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Name	Size	Permission
pdf.js	360.21 KB	-rwxr-xr-x
pdf.js.map	742.44 KB	-rwxr-xr-x
pdf.worker.js	1.25 MB	-rwxr-xr-x
pdf.worker.js.map	2.63 MB	-rwxr-xr-x

Code Editor : pdf.js.map

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permissions and\n * limitations under the License.\n */\n/* eslint-disable no-unused-vars */\n\n\"use strict\";\n\nvar pdfjsVersion =\n  typeof PDFJSDev !== \"undefined\" ? PDFJSDev.eval(\"BUNDLE_VERSION\") : void 0;\nvar pdfjsBuild =\n  typeof PDFJSDev !== \"undefined\" ? PDFJSDev.eval(\"BUNDLE_BUILD\") : void 0;\n\nvar pdfjsSharedUtil = require(\"./shared/util.js\");\nvar pdfjsDisplayAPI = require(\"./display/api.js\");\nvar pdfjsDisplayTextLayer = require(\"./display/text_layer.js\");\nvar pdfjsDisplayAnnotationLayer = require(\"./display/annotation_layer.js\");\nvar pdfjsDisplayDisplayUtils = require(\"./display/display_utils.js\");\nvar pdfjsDisplaySVG = require(\"./display/svg.js\");\nconst pdfjsDisplayWorkerOptions = require(\"./display/worker_options.js\");\nconst pdfjsDisplayAPICompatibility = require(\"./display/api_compatibility.js\");\n\nif (typeof PDFJSDev === \"undefined\" || PDFJSDev.test(\"GENERIC\")) {\n  const { isNodeJS } = require(\"./shared/is_node.js\");\n  if (isNodeJS) {\n    const PDFNodeStream = require(\"./display/node_stream.js\").PDFNodeStream;\n    pdfjsDisplayAPI.setPDFNetworkStreamFactory(params => {\n      return new PDFNodeStream(params);\n    });\n  } else {\n    const PDFNetworkStream = require(\"./display/network.js\").PDFNetworkStream;\n    let PDFFetchStream;\n    if (pdfjsDisplayDisplayUtils.isFetchSupported()) {\n      PDFFetchStream = require(\"./display/fetch_stream.js\").PDFFetchStream;\n    }\n    pdfjsDisplayAPI.setPDFNetworkStreamFactory(params => {\n      if (\n        PDFFetchStream &&\n        pdfjsDisplayDisplayUtils.isValidFetchUrl(params.url)\n      ) {\n        return new PDFFetchStream(params);\n      }\n      return new PDFNetworkStream(params);\n    });\n  }\n} else if (PDFJSDev.test(\"CHROME\")) {\n  const PDFNetworkStream = require(\"./display/network.js\").PDFNetworkStream;\n  let PDFFetchStream;\n  const isChromeWithFetchCredentials = function() {\n    // fetch does not include credentials until Chrome 61.0.3138.0 and later.\n    // https://chromium.googlesource.com/chromium/src/+/2e231cf052ca5e68e22baf0008ac9e5e29121707\n    try {\n      // Indexed properties on window are read-only in Chrome 61.0.3151.0+\n      // https://chromium.googlesource.com/chromium/src.git/+/58ab4a971b06dec13e4edf9de8382ca6847f6190\n      window[999] = 123; // should throw. Note: JS strict mode MUST be enabled.\n      delete window[999];\n      return false;\n    } catch (e) {\n      return true;\n    }\n  };\n  if (\n    pdfjsDisplayDisplayUtils.isFetchSupported() &&\n    isChromeWithFetchCredentials()\n  ) {\n    PDFFetchStream = require(\"./display/fetch_stream.js\").PDFFetchStream;\n  }\n  pdfjsDisplayAPI.setPDFNetworkStreamFactory(params => {\n    if (\n      PDFFetchStream &&\n      pdfjsDisplayDisplayUtils.isValidFetchUrl(params.url)\n    ) {\n      return new PDFFetchStream(params);\n    }\n    return new PDFNetworkStream(params);\n  });\n}\n\nexports.build = pdfjsDisplayAPI.build;\nexports.version = pdfjsDisplayAPI.version;\nexports.getDocument = pdfjsDisplayAPI.getDocument;\nexports.LoopbackPort = pdfjsDisplayAPI.LoopbackPort;\nexports.PDFDataRangeTransport = pdfjsDisplayAPI.PDFDataRangeTransport;\nexports.PDFWorker = pdfjsDisplayAPI.PDFWorker;\nexports.renderTextLayer = pdfjsDisplayTextLayer.renderTextLayer;\nexports.AnnotationLayer = pdfjsDisplayAnnotationLayer.AnnotationLayer;\nexports.createPromiseCapability = pdfjsSharedUtil.createPromiseCapability;\nexports.PasswordResponses = pdfjsSharedUtil.PasswordResponses;\nexports.InvalidPDFException = pdfjsSharedUtil.InvalidPDFException;\nexports.MissingPDFException = pdfjsSharedUtil.MissingPDFException;\nexports.SVGGraphics = pdfjsDisplaySVG.SVGGraphics;\nexports.NativeImageDecoding = pdfjsSharedUtil.NativeImageDecoding;\nexports.CMapCompressionType = pdfjsSharedUtil.CMapCompressionType;\nexports.PermissionFlag = pdfjsSharedUtil.PermissionFlag;\nexports.UnexpectedResponseException =\n  pdfjsSharedUtil.UnexpectedResponseException;\nexports.OPS = pdfjsSharedUtil.OPS;\nexports.VerbosityLevel = pdfjsSharedUtil.VerbosityLevel;\nexports.UNSUPPORTED_FEATURES = pdfjsSharedUtil.UNSUPPORTED_FEATURES;\nexports.createValidAbsoluteUrl = pdfjsSharedUtil.createValidAbsoluteUrl;\nexports.createObjectURL = pdfjsSharedUtil.createObjectURL;\nexports.removeNullCharacters = pdfjsSharedUtil.removeNullCharacters;\nexports.shadow = pdfjsSharedUtil.shadow;\nexports.Util = pdfjsSharedUtil.Util;\nexports.RenderingCancelledException =\n  pdfjsDisplayDisplayUtils.RenderingCancelledException;\nexports.getFilenameFromUrl = pdfjsDisplayDisplayUtils.getFilenameFromUrl;\nexports.LinkTarget = pdfjsDisplayDisplayUtils.LinkTarget;\nexports.addLinkAttributes = pdfjsDisplayDisplayUtils.addLinkAttributes;\nexports.loadScript = pdfjsDisplayDisplayUtils.loadScript;\nexports.PDFDateString = pdfjsDisplayDisplayUtils.PDFDateString;\nexports.GlobalWorkerOptions = pdfjsDisplayWorkerOptions.GlobalWorkerOptions;\nexports.apiCompatibilityParams =\n  pdfjsDisplayAPICompatibility.apiCompatibilityParams;\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\nimport \"./compatibility.js\";\n\nconst IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];\nconst FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0];\n\nconst NativeImageDecoding = {\n  NONE: \"none\",\n  DECODE: \"decode\",\n  DISPLAY: \"display\",\n};\n\n// Permission flags from Table 22, Section 7.6.3.2 of the PDF specification.\nconst PermissionFlag = {\n  PRINT: 0x04,\n  MODIFY_CONTENTS: 0x08,\n  COPY: 0x10,\n  MODIFY_ANNOTATIONS: 0x20,\n  FILL_INTERACTIVE_FORMS: 0x100,\n  COPY_FOR_ACCESSIBILITY: 0x200,\n  ASSEMBLE: 0x400,\n  PRINT_HIGH_QUALITY: 0x800,\n};\n\nconst TextRenderingMode = {\n  FILL: 0,\n  STROKE: 1,\n  FILL_STROKE: 2,\n  INVISIBLE: 3,\n  FILL_ADD_TO_PATH: 4,\n  STROKE_ADD_TO_PATH: 5,\n  FILL_STROKE_ADD_TO_PATH: 6,\n  ADD_TO_PATH: 7,\n  FILL_STROKE_MASK: 3,\n  ADD_TO_PATH_FLAG: 4,\n};\n\nconst ImageKind = {\n  GRAYSCALE_1BPP: 1,\n  RGB_24BPP: 2,\n  RGBA_32BPP: 3,\n};\n\nconst AnnotationType = {\n  TEXT: 1,\n  LINK: 2,\n  FREETEXT: 3,\n  LINE: 4,\n  SQUARE: 5,\n  CIRCLE: 6,\n  POLYGON: 7,\n  POLYLINE: 8,\n  HIGHLIGHT: 9,\n  UNDERLINE: 10,\n  SQUIGGLY: 11,\n  STRIKEOUT: 12,\n  STAMP: 13,\n  CARET: 14,\n  INK: 15,\n  POPUP: 16,\n  FILEATTACHMENT: 17,\n  SOUND: 18,\n  MOVIE: 19,\n  WIDGET: 20,\n  SCREEN: 21,\n  PRINTERMARK: 22,\n  TRAPNET: 23,\n  WATERMARK: 24,\n  THREED: 25,\n  REDACT: 26,\n};\n\nconst AnnotationStateModelType = {\n  MARKED: \"Marked\",\n  REVIEW: \"Review\",\n};\n\nconst AnnotationMarkedState = {\n  MARKED: \"Marked\",\n  UNMARKED: \"Unmarked\",\n};\n\nconst AnnotationReviewState = {\n  ACCEPTED: \"Accepted\",\n  REJECTED: \"Rejected\",\n  CANCELLED: \"Cancelled\",\n  COMPLETED: \"Completed\",\n  NONE: \"None\",\n};\n\nconst AnnotationReplyType = {\n  GROUP: \"Group\",\n  REPLY: \"R\",\n};\n\nconst AnnotationFlag = {\n  INVISIBLE: 0x01,\n  HIDDEN: 0x02,\n  PRINT: 0x04,\n  NOZOOM: 0x08,\n  NOROTATE: 0x10,\n  NOVIEW: 0x20,\n  READONLY: 0x40,\n  LOCKED: 0x80,\n  TOGGLENOVIEW: 0x100,\n  LOCKEDCONTENTS: 0x200,\n};\n\nconst AnnotationFieldFlag = {\n  READONLY: 0x0000001,\n  REQUIRED: 0x0000002,\n  NOEXPORT: 0x0000004,\n  MULTILINE: 0x0001000,\n  PASSWORD: 0x0002000,\n  NOTOGGLETOOFF: 0x0004000,\n  RADIO: 0x0008000,\n  PUSHBUTTON: 0x0010000,\n  COMBO: 0x0020000,\n  EDIT: 0x0040000,\n  SORT: 0x0080000,\n  FILESELECT: 0x0100000,\n  MULTISELECT: 0x0200000,\n  DONOTSPELLCHECK: 0x0400000,\n  DONOTSCROLL: 0x0800000,\n  COMB: 0x1000000,\n  RICHTEXT: 0x2000000,\n  RADIOSINUNISON: 0x2000000,\n  COMMITONSELCHANGE: 0x4000000,\n};\n\nconst AnnotationBorderStyleType = {\n  SOLID: 1,\n  DASHED: 2,\n  BEVELED: 3,\n  INSET: 4,\n  UNDERLINE: 5,\n};\n\nconst StreamType = {\n  UNKNOWN: \"UNKNOWN\",\n  FLATE: \"FLATE\",\n  LZW: \"LZW\",\n  DCT: \"DCT\",\n  JPX: \"JPX\",\n  JBIG: \"JBIG\",\n  A85: \"A85\",\n  AHX: \"AHX\",\n  CCF: \"CCF\",\n  RLX: \"RLX\", // PDF short name is 'RL', but telemetry requires three chars.\n};\n\nconst FontType = {\n  UNKNOWN: \"UNKNOWN\",\n  TYPE1: \"TYPE1\",\n  TYPE1C: \"TYPE1C\",\n  CIDFONTTYPE0: \"CIDFONTTYPE0\",\n  CIDFONTTYPE0C: \"CIDFONTTYPE0C\",\n  TRUETYPE: \"TRUETYPE\",\n  CIDFONTTYPE2: \"CIDFONTTYPE2\",\n  TYPE3: \"TYPE3\",\n  OPENTYPE: \"OPENTYPE\",\n  TYPE0: \"TYPE0\",\n  MMTYPE1: \"MMTYPE1\",\n};\n\nconst VerbosityLevel = {\n  ERRORS: 0,\n  WARNINGS: 1,\n  INFOS: 5,\n};\n\nconst CMapCompressionType = {\n  NONE: 0,\n  BINARY: 1,\n  STREAM: 2,\n};\n\n// All the possible operations for an operator list.\nconst OPS = {\n  // Intentionally start from 1 so it is easy to spot bad operators that will be\n  // 0's.\n  dependency: 1,\n  setLineWidth: 2,\n  setLineCap: 3,\n  setLineJoin: 4,\n  setMiterLimit: 5,\n  setDash: 6,\n  setRenderingIntent: 7,\n  setFlatness: 8,\n  setGState: 9,\n  save: 10,\n  restore: 11,\n  transform: 12,\n  moveTo: 13,\n  lineTo: 14,\n  curveTo: 15,\n  curveTo2: 16,\n  curveTo3: 17,\n  closePath: 18,\n  rectangle: 19,\n  stroke: 20,\n  closeStroke: 21,\n  fill: 22,\n  eoFill: 23,\n  fillStroke: 24,\n  eoFillStroke: 25,\n  closeFillStroke: 26,\n  closeEOFillStroke: 27,\n  endPath: 28,\n  clip: 29,\n  eoClip: 30,\n  beginText: 31,\n  endText: 32,\n  setCharSpacing: 33,\n  setWordSpacing: 34,\n  setHScale: 35,\n  setLeading: 36,\n  setFont: 37,\n  setTextRenderingMode: 38,\n  setTextRise: 39,\n  moveText: 40,\n  setLeadingMoveText: 41,\n  setTextMatrix: 42,\n  nextLine: 43,\n  showText: 44,\n  showSpacedText: 45,\n  nextLineShowText: 46,\n  nextLineSetSpacingShowText: 47,\n  setCharWidth: 48,\n  setCharWidthAndBounds: 49,\n  setStrokeColorSpace: 50,\n  setFillColorSpace: 51,\n  setStrokeColor: 52,\n  setStrokeColorN: 53,\n  setFillColor: 54,\n  setFillColorN: 55,\n  setStrokeGray: 56,\n  setFillGray: 57,\n  setStrokeRGBColor: 58,\n  setFillRGBColor: 59,\n  setStrokeCMYKColor: 60,\n  setFillCMYKColor: 61,\n  shadingFill: 62,\n  beginInlineImage: 63,\n  beginImageData: 64,\n  endInlineImage: 65,\n  paintXObject: 66,\n  markPoint: 67,\n  markPointProps: 68,\n  beginMarkedContent: 69,\n  beginMarkedContentProps: 70,\n  endMarkedContent: 71,\n  beginCompat: 72,\n  endCompat: 73,\n  paintFormXObjectBegin: 74,\n  paintFormXObjectEnd: 75,\n  beginGroup: 76,\n  endGroup: 77,\n  beginAnnotations: 78,\n  endAnnotations: 79,\n  beginAnnotation: 80,\n  endAnnotation: 81,\n  paintJpegXObject: 82,\n  paintImageMaskXObject: 83,\n  paintImageMaskXObjectGroup: 84,\n  paintImageXObject: 85,\n  paintInlineImageXObject: 86,\n  paintInlineImageXObjectGroup: 87,\n  paintImageXObjectRepeat: 88,\n  paintImageMaskXObjectRepeat: 89,\n  paintSolidColorImageMask: 90,\n  constructPath: 91,\n};\n\nconst UNSUPPORTED_FEATURES = {\n  unknown: \"unknown\",\n  forms: \"forms\",\n  javaScript: \"javaScript\",\n  smask: \"smask\",\n  shadingPattern: \"shadingPattern\",\n  font: \"font\",\n};\n\nconst PasswordResponses = {\n  NEED_PASSWORD: 1,\n  INCORRECT_PASSWORD: 2,\n};\n\nlet verbosity = VerbosityLevel.WARNINGS;\n\nfunction setVerbosityLevel(level) {\n  if (Number.isInteger(level)) {\n    verbosity = level;\n  }\n}\n\nfunction getVerbosityLevel() {\n  return verbosity;\n}\n\n// A notice for devs. These are good for things that are helpful to devs, such\n// as warning that Workers were disabled, which is important to devs but not\n// end users.\nfunction info(msg) {\n  if (verbosity >= VerbosityLevel.INFOS) {\n    console.log(`Info: ${msg}`);\n  }\n}\n\n// Non-fatal warnings.\nfunction warn(msg) {\n  if (verbosity >= VerbosityLevel.WARNINGS) {\n    console.log(`Warning: ${msg}`);\n  }\n}\n\nfunction unreachable(msg) {\n  throw new Error(msg);\n}\n\nfunction assert(cond, msg) {\n  if (!cond) {\n    unreachable(msg);\n  }\n}\n\n// Checks if URLs have the same origin. For non-HTTP based URLs, returns false.\nfunction isSameOrigin(baseUrl, otherUrl) {\n  let base;\n  try {\n    base = new URL(baseUrl);\n    if (!base.origin || base.origin === \"null\") {\n      return false; // non-HTTP url\n    }\n  } catch (e) {\n    return false;\n  }\n\n  const other = new URL(otherUrl, base);\n  return base.origin === other.origin;\n}\n\n// Checks if URLs use one of the whitelisted protocols, e.g. to avoid XSS.\nfunction _isValidProtocol(url) {\n  if (!url) {\n    return false;\n  }\n  switch (url.protocol) {\n    case \"http:\":\n    case \"https:\":\n    case \"ftp:\":\n    case \"mailto:\":\n    case \"tel:\":\n      return true;\n    default:\n      return false;\n  }\n}\n\n/**\n * Attempts to create a valid absolute URL.\n *\n * @param {URL|string} url - An absolute, or relative, URL.\n * @param {URL|string} baseUrl - An absolute URL.\n * @returns Either a valid {URL}, or `null` otherwise.\n */\nfunction createValidAbsoluteUrl(url, baseUrl) {\n  if (!url) {\n    return null;\n  }\n  try {\n    const absoluteUrl = baseUrl ? new URL(url, baseUrl) : new URL(url);\n    if (_isValidProtocol(absoluteUrl)) {\n      return absoluteUrl;\n    }\n  } catch (ex) {\n    /* `new URL()` will throw on incorrect data. */\n  }\n  return null;\n}\n\nfunction shadow(obj, prop, value) {\n  Object.defineProperty(obj, prop, {\n    value,\n    enumerable: true,\n    configurable: true,\n    writable: false,\n  });\n  return value;\n}\n\nconst BaseException = (function BaseExceptionClosure() {\n  function BaseException(message) {\n    if (this.constructor === BaseException) {\n      unreachable(\"Cannot initialize BaseException.\");\n    }\n    this.message = message;\n    this.name = this.constructor.name;\n  }\n  BaseException.prototype = new Error();\n  BaseException.constructor = BaseException;\n\n  return BaseException;\n})();\n\nclass PasswordException extends BaseException {\n  constructor(msg, code) {\n    super(msg);\n    this.code = code;\n  }\n}\n\nclass UnknownErrorException extends BaseException {\n  constructor(msg, details) {\n    super(msg);\n    this.details = details;\n  }\n}\n\nclass InvalidPDFException extends BaseException {}\n\nclass MissingPDFException extends BaseException {}\n\nclass UnexpectedResponseException extends BaseException {\n  constructor(msg, status) {\n    super(msg);\n    this.status = status;\n  }\n}\n\n/**\n * Error caused during parsing PDF data.\n */\nclass FormatError extends BaseException {}\n\n/**\n * Error used to indicate task cancellation.\n */\nclass AbortException extends BaseException {}\n\nconst NullCharactersRegExp = /\\x00/g;\n\nfunction removeNullCharacters(str) {\n  if (typeof str !== \"string\") {\n    warn(\"The argument for removeNullCharacters must be a string.\");\n    return str;\n  }\n  return str.replace(NullCharactersRegExp, \"\");\n}\n\nfunction bytesToString(bytes) {\n  assert(\n    bytes !== null && typeof bytes === \"object\" && bytes.length !== undefined,\n    \"Invalid argument for bytesToString\"\n  );\n  const length = bytes.length;\n  const MAX_ARGUMENT_COUNT = 8192;\n  if (length < MAX_ARGUMENT_COUNT) {\n    return String.fromCharCode.apply(null, bytes);\n  }\n  const strBuf = [];\n  for (let i = 0; i < length; i += MAX_ARGUMENT_COUNT) {\n    const chunkEnd = Math.min(i + MAX_ARGUMENT_COUNT, length);\n    const chunk = bytes.subarray(i, chunkEnd);\n    strBuf.push(String.fromCharCode.apply(null, chunk));\n  }\n  return strBuf.join(\"\");\n}\n\nfunction stringToBytes(str) {\n  assert(typeof str === \"string\", \"Invalid argument for stringToBytes\");\n  const length = str.length;\n  const bytes = new Uint8Array(length);\n  for (let i = 0; i < length; ++i) {\n    bytes[i] = str.charCodeAt(i) & 0xff;\n  }\n  return bytes;\n}\n\n/**\n * Gets length of the array (Array, Uint8Array, or string) in bytes.\n * @param {Array|Uint8Array|string} arr\n * @returns {number}\n */\nfunction arrayByteLength(arr) {\n  if (arr.length !== undefined) {\n    return arr.length;\n  }\n  assert(arr.byteLength !== undefined);\n  return arr.byteLength;\n}\n\n/**\n * Combines array items (arrays) into single Uint8Array object.\n * @param {Array} arr - the array of the arrays (Array, Uint8Array, or string).\n * @returns {Uint8Array}\n */\nfunction arraysToBytes(arr) {\n  const length = arr.length;\n  // Shortcut: if first and only item is Uint8Array, return it.\n  if (length === 1 && arr[0] instanceof Uint8Array) {\n    return arr[0];\n  }\n  let resultLength = 0;\n  for (let i = 0; i < length; i++) {\n    resultLength += arrayByteLength(arr[i]);\n  }\n  let pos = 0;\n  const data = new Uint8Array(resultLength);\n  for (let i = 0; i < length; i++) {\n    let item = arr[i];\n    if (!(item instanceof Uint8Array)) {\n      if (typeof item === \"string\") {\n        item = stringToBytes(item);\n      } else {\n        item = new Uint8Array(item);\n      }\n    }\n    const itemLength = item.byteLength;\n    data.set(item, pos);\n    pos += itemLength;\n  }\n  return data;\n}\n\nfunction string32(value) {\n  return String.fromCharCode(\n    (value >> 24) & 0xff,\n    (value >> 16) & 0xff,\n    (value >> 8) & 0xff,\n    value & 0xff\n  );\n}\n\n// Checks the endianness of the platform.\nfunction isLittleEndian() {\n  const buffer8 = new Uint8Array(4);\n  buffer8[0] = 1;\n  const view32 = new Uint32Array(buffer8.buffer, 0, 1);\n  return view32[0] === 1;\n}\nconst IsLittleEndianCached = {\n  get value() {\n    return shadow(this, \"value\", isLittleEndian());\n  },\n};\n\n// Checks if it's possible to eval JS expressions.\nfunction isEvalSupported() {\n  try {\n    new Function(\"\"); // eslint-disable-line no-new, no-new-func\n    return true;\n  } catch (e) {\n    return false;\n  }\n}\nconst IsEvalSupportedCached = {\n  get value() {\n    return shadow(this, \"value\", isEvalSupported());\n  },\n};\n\nconst rgbBuf = [\"rgb(\", 0, \",\", 0, \",\", 0, \")\"];\n\nclass Util {\n  // makeCssRgb() can be called thousands of times. Using ´rgbBuf` avoids\n  // creating many intermediate strings.\n  static makeCssRgb(r, g, b) {\n    rgbBuf[1] = r;\n    rgbBuf[3] = g;\n    rgbBuf[5] = b;\n    return rgbBuf.join(\"\");\n  }\n\n  // Concatenates two transformation matrices together and returns the result.\n  static transform(m1, m2) {\n    return [\n      m1[0] * m2[0] + m1[2] * m2[1],\n      m1[1] * m2[0] + m1[3] * m2[1],\n      m1[0] * m2[2] + m1[2] * m2[3],\n      m1[1] * m2[2] + m1[3] * m2[3],\n      m1[0] * m2[4] + m1[2] * m2[5] + m1[4],\n      m1[1] * m2[4] + m1[3] * m2[5] + m1[5],\n    ];\n  }\n\n  // For 2d affine transforms\n  static applyTransform(p, m) {\n    const xt = p[0] * m[0] + p[1] * m[2] + m[4];\n    const yt = p[0] * m[1] + p[1] * m[3] + m[5];\n    return [xt, yt];\n  }\n\n  static applyInverseTransform(p, m) {\n    const d = m[0] * m[3] - m[1] * m[2];\n    const xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d;\n    const yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d;\n    return [xt, yt];\n  }\n\n  // Applies the transform to the rectangle and finds the minimum axially\n  // aligned bounding box.\n  static getAxialAlignedBoundingBox(r, m) {\n    const p1 = Util.applyTransform(r, m);\n    const p2 = Util.applyTransform(r.slice(2, 4), m);\n    const p3 = Util.applyTransform([r[0], r[3]], m);\n    const p4 = Util.applyTransform([r[2], r[1]], m);\n    return [\n      Math.min(p1[0], p2[0], p3[0], p4[0]),\n      Math.min(p1[1], p2[1], p3[1], p4[1]),\n      Math.max(p1[0], p2[0], p3[0], p4[0]),\n      Math.max(p1[1], p2[1], p3[1], p4[1]),\n    ];\n  }\n\n  static inverseTransform(m) {\n    const d = m[0] * m[3] - m[1] * m[2];\n    return [\n      m[3] / d,\n      -m[1] / d,\n      -m[2] / d,\n      m[0] / d,\n      (m[2] * m[5] - m[4] * m[3]) / d,\n      (m[4] * m[1] - m[5] * m[0]) / d,\n    ];\n  }\n\n  // Apply a generic 3d matrix M on a 3-vector v:\n  //   | a b c |   | X |\n  //   | d e f | x | Y |\n  //   | g h i |   | Z |\n  // M is assumed to be serialized as [a,b,c,d,e,f,g,h,i],\n  // with v as [X,Y,Z]\n  static apply3dTransform(m, v) {\n    return [\n      m[0] * v[0] + m[1] * v[1] + m[2] * v[2],\n      m[3] * v[0] + m[4] * v[1] + m[5] * v[2],\n      m[6] * v[0] + m[7] * v[1] + m[8] * v[2],\n    ];\n  }\n\n  // This calculation uses Singular Value Decomposition.\n  // The SVD can be represented with formula A = USV. We are interested in the\n  // matrix S here because it represents the scale values.\n  static singularValueDecompose2dScale(m) {\n    const transpose = [m[0], m[2], m[1], m[3]];\n\n    // Multiply matrix m with its transpose.\n    const a = m[0] * transpose[0] + m[1] * transpose[2];\n    const b = m[0] * transpose[1] + m[1] * transpose[3];\n    const c = m[2] * transpose[0] + m[3] * transpose[2];\n    const d = m[2] * transpose[1] + m[3] * transpose[3];\n\n    // Solve the second degree polynomial to get roots.\n    const first = (a + d) / 2;\n    const second = Math.sqrt((a + d) * (a + d) - 4 * (a * d - c * b)) / 2;\n    const sx = first + second || 1;\n    const sy = first - second || 1;\n\n    // Scale values are the square roots of the eigenvalues.\n    return [Math.sqrt(sx), Math.sqrt(sy)];\n  }\n\n  // Normalize rectangle rect=[x1, y1, x2, y2] so that (x1,y1) < (x2,y2)\n  // For coordinate systems whose origin lies in the bottom-left, this\n  // means normalization to (BL,TR) ordering. For systems with origin in the\n  // top-left, this means (TL,BR) ordering.\n  static normalizeRect(rect) {\n    const r = rect.slice(0); // clone rect\n    if (rect[0] > rect[2]) {\n      r[0] = rect[2];\n      r[2] = rect[0];\n    }\n    if (rect[1] > rect[3]) {\n      r[1] = rect[3];\n      r[3] = rect[1];\n    }\n    return r;\n  }\n\n  // Returns a rectangle [x1, y1, x2, y2] corresponding to the\n  // intersection of rect1 and rect2. If no intersection, returns 'false'\n  // The rectangle coordinates of rect1, rect2 should be [x1, y1, x2, y2]\n  static intersect(rect1, rect2) {\n    function compare(a, b) {\n      return a - b;\n    }\n\n    // Order points along the axes\n    const orderedX = [rect1[0], rect1[2], rect2[0], rect2[2]].sort(compare);\n    const orderedY = [rect1[1], rect1[3], rect2[1], rect2[3]].sort(compare);\n    const result = [];\n\n    rect1 = Util.normalizeRect(rect1);\n    rect2 = Util.normalizeRect(rect2);\n\n    // X: first and second points belong to different rectangles?\n    if (\n      (orderedX[0] === rect1[0] && orderedX[1] === rect2[0]) ||\n      (orderedX[0] === rect2[0] && orderedX[1] === rect1[0])\n    ) {\n      // Intersection must be between second and third points\n      result[0] = orderedX[1];\n      result[2] = orderedX[2];\n    } else {\n      return null;\n    }\n\n    // Y: first and second points belong to different rectangles?\n    if (\n      (orderedY[0] === rect1[1] && orderedY[1] === rect2[1]) ||\n      (orderedY[0] === rect2[1] && orderedY[1] === rect1[1])\n    ) {\n      // Intersection must be between second and third points\n      result[1] = orderedY[1];\n      result[3] = orderedY[2];\n    } else {\n      return null;\n    }\n\n    return result;\n  }\n}\n\n// prettier-ignore\nconst PDFStringTranslateTable = [\n  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\n  0x2D8, 0x2C7, 0x2C6, 0x2D9, 0x2DD, 0x2DB, 0x2DA, 0x2DC, 0, 0, 0, 0, 0, 0, 0,\n  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\n  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\n  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\n  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014,\n  0x2013, 0x192, 0x2044, 0x2039, 0x203A, 0x2212, 0x2030, 0x201E, 0x201C,\n  0x201D, 0x2018, 0x2019, 0x201A, 0x2122, 0xFB01, 0xFB02, 0x141, 0x152, 0x160,\n  0x178, 0x17D, 0x131, 0x142, 0x153, 0x161, 0x17E, 0, 0x20AC\n];\n\nfunction stringToPDFString(str) {\n  const length = str.length,\n    strBuf = [];\n  if (str[0] === \"\\xFE\" && str[1] === \"\\xFF\") {\n    // UTF16BE BOM\n    for (let i = 2; i < length; i += 2) {\n      strBuf.push(\n        String.fromCharCode((str.charCodeAt(i) << 8) | str.charCodeAt(i + 1))\n      );\n    }\n  } else if (str[0] === \"\\xFF\" && str[1] === \"\\xFE\") {\n    // UTF16LE BOM\n    for (let i = 2; i < length; i += 2) {\n      strBuf.push(\n        String.fromCharCode((str.charCodeAt(i + 1) << 8) | str.charCodeAt(i))\n      );\n    }\n  } else {\n    for (let i = 0; i < length; ++i) {\n      const code = PDFStringTranslateTable[str.charCodeAt(i)];\n      strBuf.push(code ? String.fromCharCode(code) : str.charAt(i));\n    }\n  }\n  return strBuf.join(\"\");\n}\n\nfunction stringToUTF8String(str) {\n  return decodeURIComponent(escape(str));\n}\n\nfunction utf8StringToString(str) {\n  return unescape(encodeURIComponent(str));\n}\n\nfunction isEmptyObj(obj) {\n  for (const key in obj) {\n    return false;\n  }\n  return true;\n}\n\nfunction isBool(v) {\n  return typeof v === \"boolean\";\n}\n\nfunction isNum(v) {\n  return typeof v === \"number\";\n}\n\nfunction isString(v) {\n  return typeof v === \"string\";\n}\n\nfunction isArrayBuffer(v) {\n  return typeof v === \"object\" && v !== null && v.byteLength !== undefined;\n}\n\nfunction isArrayEqual(arr1, arr2) {\n  if (arr1.length !== arr2.length) {\n    return false;\n  }\n  return arr1.every(function(element, index) {\n    return element === arr2[index];\n  });\n}\n\n/**\n * Promise Capability object.\n *\n * @typedef {Object} PromiseCapability\n * @property {Promise} promise - A Promise object.\n * @property {boolean} settled - If the Promise has been fulfilled/rejected.\n * @property {function} resolve - Fulfills the Promise.\n * @property {function} reject - Rejects the Promise.\n */\n\n/**\n * Creates a promise capability object.\n * @alias createPromiseCapability\n *\n * @returns {PromiseCapability}\n */\nfunction createPromiseCapability() {\n  const capability = Object.create(null);\n  let isSettled = false;\n\n  Object.defineProperty(capability, \"settled\", {\n    get() {\n      return isSettled;\n    },\n  });\n  capability.promise = new Promise(function(resolve, reject) {\n    capability.resolve = function(data) {\n      isSettled = true;\n      resolve(data);\n    };\n    capability.reject = function(reason) {\n      isSettled = true;\n      reject(reason);\n    };\n  });\n  return capability;\n}\n\nconst createObjectURL = (function createObjectURLClosure() {\n  // Blob/createObjectURL is not available, falling back to data schema.\n  const digits =\n    \"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\";\n\n  return function createObjectURL(data, contentType, forceDataSchema = false) {\n    if (!forceDataSchema && URL.createObjectURL) {\n      const blob = new Blob([data], { type: contentType });\n      return URL.createObjectURL(blob);\n    }\n\n    let buffer = `data:${contentType};base64,`;\n    for (let i = 0, ii = data.length; i < ii; i += 3) {\n      const b1 = data[i] & 0xff;\n      const b2 = data[i + 1] & 0xff;\n      const b3 = data[i + 2] & 0xff;\n      const d1 = b1 >> 2,\n        d2 = ((b1 & 3) << 4) | (b2 >> 4);\n      const d3 = i + 1 < ii ? ((b2 & 0xf) << 2) | (b3 >> 6) : 64;\n      const d4 = i + 2 < ii ? b3 & 0x3f : 64;\n      buffer += digits[d1] + digits[d2] + digits[d3] + digits[d4];\n    }\n    return buffer;\n  };\n})();\n\nexport {\n  BaseException,\n  FONT_IDENTITY_MATRIX,\n  IDENTITY_MATRIX,\n  OPS,\n  VerbosityLevel,\n  UNSUPPORTED_FEATURES,\n  AnnotationBorderStyleType,\n  AnnotationFieldFlag,\n  AnnotationFlag,\n  AnnotationMarkedState,\n  AnnotationReplyType,\n  AnnotationReviewState,\n  AnnotationStateModelType,\n  AnnotationType,\n  FontType,\n  ImageKind,\n  CMapCompressionType,\n  AbortException,\n  InvalidPDFException,\n  MissingPDFException,\n  NativeImageDecoding,\n  PasswordException,\n  PasswordResponses,\n  PermissionFlag,\n  StreamType,\n  TextRenderingMode,\n  UnexpectedResponseException,\n  UnknownErrorException,\n  Util,\n  FormatError,\n  arrayByteLength,\n  arraysToBytes,\n  assert,\n  bytesToString,\n  createPromiseCapability,\n  createObjectURL,\n  getVerbosityLevel,\n  info,\n  isArrayBuffer,\n  isArrayEqual,\n  isBool,\n  isEmptyObj,\n  isNum,\n  isString,\n  isSameOrigin,\n  createValidAbsoluteUrl,\n  IsLittleEndianCached,\n  IsEvalSupportedCached,\n  removeNullCharacters,\n  setVerbosityLevel,\n  shadow,\n  string32,\n  stringToBytes,\n  stringToPDFString,\n  stringToUTF8String,\n  utf8StringToString,\n  warn,\n  unreachable,\n};\n","/* Copyright 2017 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\n// Skip compatibility checks for modern builds (unless we're running the\n// unit-tests in Node.js/Travis) and if we already ran the module.\nif (\n  (typeof PDFJSDev === \"undefined\" ||\n    PDFJSDev.test(\"!SKIP_BABEL || (LIB && TESTING)\")) &&\n  (typeof globalThis === \"undefined\" || !globalThis._pdfjsCompatibilityChecked)\n) {\n  // Provides support for globalThis in legacy browsers.\n  // Support: IE11/Edge, Opera\n  if (typeof globalThis === \"undefined\" || globalThis.Math !== Math) {\n    // eslint-disable-next-line no-global-assign\n    globalThis = require(\"core-js/es/global-this\");\n  }\n  globalThis._pdfjsCompatibilityChecked = true;\n\n  const { isNodeJS } = require(\"./is_node.js\");\n\n  const hasDOM = typeof window === \"object\" && typeof document === \"object\";\n  const userAgent =\n    (typeof navigator !== \"undefined\" && navigator.userAgent) || \"\";\n  const isIE = /Trident/.test(userAgent);\n\n  // Support: Node.js\n  (function checkNodeBtoa() {\n    if (globalThis.btoa || !isNodeJS) {\n      return;\n    }\n    globalThis.btoa = function(chars) {\n      // eslint-disable-next-line no-undef\n      return Buffer.from(chars, \"binary\").toString(\"base64\");\n    };\n  })();\n\n  // Support: Node.js\n  (function checkNodeAtob() {\n    if (globalThis.atob || !isNodeJS) {\n      return;\n    }\n    globalThis.atob = function(input) {\n      // eslint-disable-next-line no-undef\n      return Buffer.from(input, \"base64\").toString(\"binary\");\n    };\n  })();\n\n  // Provides support for ChildNode.remove in legacy browsers.\n  // Support: IE.\n  (function checkChildNodeRemove() {\n    if (!hasDOM) {\n      return;\n    }\n    if (typeof Element.prototype.remove !== \"undefined\") {\n      return;\n    }\n    Element.prototype.remove = function() {\n      if (this.parentNode) {\n        // eslint-disable-next-line mozilla/avoid-removeChild\n        this.parentNode.removeChild(this);\n      }\n    };\n  })();\n\n  // Provides support for DOMTokenList.prototype.{add, remove}, with more than\n  // one parameter, in legacy browsers.\n  // Support: IE\n  (function checkDOMTokenListAddRemove() {\n    if (!hasDOM || isNodeJS) {\n      return;\n    }\n    const div = document.createElement(\"div\");\n    div.classList.add(\"testOne\", \"testTwo\");\n\n    if (\n      div.classList.contains(\"testOne\") === true &&\n      div.classList.contains(\"testTwo\") === true\n    ) {\n      return;\n    }\n    const OriginalDOMTokenListAdd = DOMTokenList.prototype.add;\n    const OriginalDOMTokenListRemove = DOMTokenList.prototype.remove;\n\n    DOMTokenList.prototype.add = function(...tokens) {\n      for (const token of tokens) {\n        OriginalDOMTokenListAdd.call(this, token);\n      }\n    };\n    DOMTokenList.prototype.remove = function(...tokens) {\n      for (const token of tokens) {\n        OriginalDOMTokenListRemove.call(this, token);\n      }\n    };\n  })();\n\n  // Provides support for DOMTokenList.prototype.toggle, with the optional\n  // \"force\" parameter, in legacy browsers.\n  // Support: IE\n  (function checkDOMTokenListToggle() {\n    if (!hasDOM || isNodeJS) {\n      return;\n    }\n    const div = document.createElement(\"div\");\n    if (div.classList.toggle(\"test\", 0) === false) {\n      return;\n    }\n\n    DOMTokenList.prototype.toggle = function(token) {\n      const force =\n        arguments.length > 1 ? !!arguments[1] : !this.contains(token);\n      return this[force ? \"add\" : \"remove\"](token), force;\n    };\n  })();\n\n  // Provides support for window.history.{pushState, replaceState}, with the\n  // `url` parameter set to `undefined`, without breaking the document URL.\n  // Support: IE\n  (function checkWindowHistoryPushStateReplaceState() {\n    if (!hasDOM || !isIE) {\n      return;\n    }\n    const OriginalPushState = window.history.pushState;\n    const OriginalReplaceState = window.history.replaceState;\n\n    window.history.pushState = function(state, title, url) {\n      const args = url === undefined ? [state, title] : [state, title, url];\n      OriginalPushState.apply(this, args);\n    };\n    window.history.replaceState = function(state, title, url) {\n      const args = url === undefined ? [state, title] : [state, title, url];\n      OriginalReplaceState.apply(this, args);\n    };\n  })();\n\n  // Provides support for String.prototype.startsWith in legacy browsers.\n  // Support: IE, Chrome<41\n  (function checkStringStartsWith() {\n    if (String.prototype.startsWith) {\n      return;\n    }\n    require(\"core-js/es/string/starts-with.js\");\n  })();\n\n  // Provides support for String.prototype.endsWith in legacy browsers.\n  // Support: IE, Chrome<41\n  (function checkStringEndsWith() {\n    if (String.prototype.endsWith) {\n      return;\n    }\n    require(\"core-js/es/string/ends-with.js\");\n  })();\n\n  // Provides support for String.prototype.includes in legacy browsers.\n  // Support: IE, Chrome<41\n  (function checkStringIncludes() {\n    if (String.prototype.includes) {\n      return;\n    }\n    require(\"core-js/es/string/includes.js\");\n  })();\n\n  // Provides support for Array.prototype.includes in legacy browsers.\n  // Support: IE, Chrome<47\n  (function checkArrayIncludes() {\n    if (Array.prototype.includes) {\n      return;\n    }\n    require(\"core-js/es/array/includes.js\");\n  })();\n\n  // Provides support for Array.from in legacy browsers.\n  // Support: IE\n  (function checkArrayFrom() {\n    if (Array.from) {\n      return;\n    }\n    require(\"core-js/es/array/from.js\");\n  })();\n\n  // Provides support for Object.assign in legacy browsers.\n  // Support: IE\n  (function checkObjectAssign() {\n    if (Object.assign) {\n      return;\n    }\n    require(\"core-js/es/object/assign.js\");\n  })();\n\n  // Provides support for Math.log2 in legacy browsers.\n  // Support: IE, Chrome<38\n  (function checkMathLog2() {\n    if (Math.log2) {\n      return;\n    }\n    Math.log2 = require(\"core-js/es/math/log2.js\");\n  })();\n\n  // Provides support for Number.isNaN in legacy browsers.\n  // Support: IE.\n  (function checkNumberIsNaN() {\n    if (Number.isNaN) {\n      return;\n    }\n    Number.isNaN = require(\"core-js/es/number/is-nan.js\");\n  })();\n\n  // Provides support for Number.isInteger in legacy browsers.\n  // Support: IE, Chrome<34\n  (function checkNumberIsInteger() {\n    if (Number.isInteger) {\n      return;\n    }\n    Number.isInteger = require(\"core-js/es/number/is-integer.js\");\n  })();\n\n  // Support: IE, Safari<11, Chrome<63\n  (function checkPromise() {\n    if (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"IMAGE_DECODERS\")) {\n      // The current image decoders are synchronous, hence `Promise` shouldn't\n      // need to be polyfilled for the IMAGE_DECODERS build target.\n      return;\n    }\n    if (globalThis.Promise && globalThis.Promise.allSettled) {\n      return;\n    }\n    globalThis.Promise = require(\"core-js/es/promise/index.js\");\n  })();\n\n  // Support: IE\n  (function checkURL() {\n    if (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"IMAGE_DECODERS\")) {\n      // The current image decoders don't use the `URL` constructor, so it\n      // doesn't need to be polyfilled for the IMAGE_DECODERS build target.\n      return;\n    }\n    if (typeof PDFJSDev !== \"undefined\" && !PDFJSDev.test(\"GENERIC\")) {\n      // The `URL` constructor is assumed to be available in the extension\n      // builds.\n      return;\n    }\n    globalThis.URL = require(\"core-js/web/url.js\");\n  })();\n\n  // Support: IE, Node.js\n  (function checkReadableStream() {\n    if (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"IMAGE_DECODERS\")) {\n      // The current image decoders are synchronous, hence `ReadableStream`\n      // shouldn't need to be polyfilled for the IMAGE_DECODERS build target.\n      return;\n    }\n    let isReadableStreamSupported = false;\n\n    if (typeof ReadableStream !== \"undefined\") {\n      // MS Edge may say it has ReadableStream but they are not up to spec yet.\n      try {\n        // eslint-disable-next-line no-new\n        new ReadableStream({\n          start(controller) {\n            controller.close();\n          },\n        });\n        isReadableStreamSupported = true;\n      } catch (e) {\n        // The ReadableStream constructor cannot be used.\n      }\n    }\n    if (isReadableStreamSupported) {\n      return;\n    }\n    globalThis.ReadableStream = require(\"web-streams-polyfill/dist/ponyfill.js\").ReadableStream;\n  })();\n\n  // We want to support Map iteration, but it doesn't seem possible to easily\n  // test for that specifically; hence using a similarly unsupported property.\n  // Support: IE11\n  (function checkMapEntries() {\n    if (globalThis.Map && globalThis.Map.prototype.entries) {\n      return;\n    }\n    globalThis.Map = require(\"core-js/es/map/index.js\");\n  })();\n\n  // We want to support Set iteration, but it doesn't seem possible to easily\n  // test for that specifically; hence using a similarly unsupported property.\n  // Support: IE11\n  (function checkSetEntries() {\n    if (globalThis.Set && globalThis.Set.prototype.entries) {\n      return;\n    }\n    globalThis.Set = require(\"core-js/es/set/index.js\");\n  })();\n\n  // Support: IE<11, Safari<8, Chrome<36\n  (function checkWeakMap() {\n    if (globalThis.WeakMap) {\n      return;\n    }\n    globalThis.WeakMap = require(\"core-js/es/weak-map/index.js\");\n  })();\n\n  // Support: IE11\n  (function checkWeakSet() {\n    if (globalThis.WeakSet) {\n      return;\n    }\n    globalThis.WeakSet = require(\"core-js/es/weak-set/index.js\");\n  })();\n\n  // Provides support for String.codePointAt in legacy browsers.\n  // Support: IE11.\n  (function checkStringCodePointAt() {\n    if (String.prototype.codePointAt) {\n      return;\n    }\n    require(\"core-js/es/string/code-point-at.js\");\n  })();\n\n  // Provides support for String.fromCodePoint in legacy browsers.\n  // Support: IE11.\n  (function checkStringFromCodePoint() {\n    if (String.fromCodePoint) {\n      return;\n    }\n    String.fromCodePoint = require(\"core-js/es/string/from-code-point.js\");\n  })();\n\n  // Support: IE\n  (function checkSymbol() {\n    if (globalThis.Symbol) {\n      return;\n    }\n    require(\"core-js/es/symbol/index.js\");\n  })();\n\n  // Provides support for String.prototype.padStart in legacy browsers.\n  // Support: IE, Chrome<57\n  (function checkStringPadStart() {\n    if (String.prototype.padStart) {\n      return;\n    }\n    require(\"core-js/es/string/pad-start.js\");\n  })();\n\n  // Provides support for String.prototype.padEnd in legacy browsers.\n  // Support: IE, Chrome<57\n  (function checkStringPadEnd() {\n    if (String.prototype.padEnd) {\n      return;\n    }\n    require(\"core-js/es/string/pad-end.js\");\n  })();\n\n  // Provides support for Object.values in legacy browsers.\n  // Support: IE, Chrome<54\n  (function checkObjectValues() {\n    if (Object.values) {\n      return;\n    }\n    Object.values = require(\"core-js/es/object/values.js\");\n  })();\n}\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\n/**\n * @module pdfjsLib\n */\n\nimport {\n  AbortException,\n  assert,\n  createPromiseCapability,\n  getVerbosityLevel,\n  info,\n  InvalidPDFException,\n  isArrayBuffer,\n  isSameOrigin,\n  MissingPDFException,\n  NativeImageDecoding,\n  PasswordException,\n  setVerbosityLevel,\n  shadow,\n  stringToBytes,\n  UnexpectedResponseException,\n  UnknownErrorException,\n  unreachable,\n  warn,\n} from \"../shared/util.js\";\nimport {\n  deprecated,\n  DOMCanvasFactory,\n  DOMCMapReaderFactory,\n  loadScript,\n  PageViewport,\n  releaseImageResources,\n  RenderingCancelledException,\n  StatTimer,\n} from \"./display_utils.js\";\nimport { FontFaceObject, FontLoader } from \"./font_loader.js\";\nimport { apiCompatibilityParams } from \"./api_compatibility.js\";\nimport { CanvasGraphics } from \"./canvas.js\";\nimport { GlobalWorkerOptions } from \"./worker_options.js\";\nimport { isNodeJS } from \"../shared/is_node.js\";\nimport { MessageHandler } from \"../shared/message_handler.js\";\nimport { Metadata } from \"./metadata.js\";\nimport { PDFDataTransportStream } from \"./transport_stream.js\";\nimport { WebGLContext } from \"./webgl.js\";\n\nconst DEFAULT_RANGE_CHUNK_SIZE = 65536; // 2^16 = 65536\nconst RENDERING_CANCELLED_TIMEOUT = 100; // ms\n\n/**\n * @typedef {function} IPDFStreamFactory\n * @param {DocumentInitParameters} params The document initialization\n * parameters. The \"url\" key is always present.\n * @returns {IPDFStream}\n */\n\n/** @type IPDFStreamFactory */\nlet createPDFNetworkStream;\n\n/**\n * Sets the function that instantiates a IPDFStream as an alternative PDF data\n * transport.\n * @param {IPDFStreamFactory} pdfNetworkStreamFactory - the factory function\n * that takes document initialization parameters (including a \"url\") and returns\n * an instance of IPDFStream.\n */\nfunction setPDFNetworkStreamFactory(pdfNetworkStreamFactory) {\n  createPDFNetworkStream = pdfNetworkStreamFactory;\n}\n\n/**\n * Document initialization / loading parameters object.\n *\n * @typedef {Object} DocumentInitParameters\n * @property {string}     [url] - The URL of the PDF.\n * @property {TypedArray|Array|string} [data] - Binary PDF data. Use typed\n *    arrays (Uint8Array) to improve the memory usage. If PDF data is\n *    BASE64-encoded, use atob() to convert it to a binary string first.\n * @property {Object}     [httpHeaders] - Basic authentication headers.\n * @property {boolean}    [withCredentials] - Indicates whether or not\n *   cross-site Access-Control requests should be made using credentials such\n *   as cookies or authorization headers. The default is false.\n * @property {string}     [password] - For decrypting password-protected PDFs.\n * @property {TypedArray} [initialData] - A typed array with the first portion\n *   or all of the pdf data. Used by the extension since some data is already\n *   loaded before the switch to range requests.\n * @property {number}     [length] - The PDF file length. It's used for\n *   progress reports and range requests operations.\n * @property {PDFDataRangeTransport} [range]\n * @property {number}     [rangeChunkSize] - Specify maximum number of bytes\n *   fetched per range request. The default value is 2^16 = 65536.\n * @property {PDFWorker}  [worker] - The worker that will be used for\n *   the loading and parsing of the PDF data.\n * @property {number} [verbosity] - Controls the logging level; the\n *   constants from {VerbosityLevel} should be used.\n * @property {string} [docBaseUrl] - The base URL of the document,\n *   used when attempting to recover valid absolute URLs for annotations, and\n *   outline items, that (incorrectly) only specify relative URLs.\n * @property {string} [nativeImageDecoderSupport] - Strategy for\n *   decoding certain (simple) JPEG images in the browser. This is useful for\n *   environments without DOM image and canvas support, such as e.g. Node.js.\n *   Valid values are 'decode', 'display' or 'none'; where 'decode' is intended\n *   for browsers with full image/canvas support, 'display' for environments\n *   with limited image support through stubs (useful for SVG conversion),\n *   and 'none' where JPEG images will be decoded entirely by PDF.js.\n *   The default value is 'decode'.\n * @property {string} [cMapUrl] - The URL where the predefined\n *   Adobe CMaps are located. Include trailing slash.\n * @property {boolean} [cMapPacked] - Specifies if the Adobe CMaps are\n *   binary packed.\n * @property {Object} [CMapReaderFactory] - The factory that will be\n *   used when reading built-in CMap files. Providing a custom factory is useful\n *   for environments without `XMLHttpRequest` support, such as e.g. Node.js.\n *   The default value is {DOMCMapReaderFactory}.\n * @property {boolean} [stopAtErrors] - Reject certain promises, e.g.\n *   `getOperatorList`, `getTextContent`, and `RenderTask`, when the associated\n *   PDF data cannot be successfully parsed, instead of attempting to recover\n *   whatever possible of the data. The default value is `false`.\n * @property {number} [maxImageSize] - The maximum allowed image size\n *   in total pixels, i.e. width * height. Images above this value will not be\n *   rendered. Use -1 for no limit, which is also the default value.\n * @property {boolean} [isEvalSupported] - Determines if we can eval\n *   strings as JS. Primarily used to improve performance of font rendering,\n *   and when parsing PDF functions. The default value is `true`.\n * @property {boolean} [disableFontFace] - By default fonts are\n *   converted to OpenType fonts and loaded via font face rules. If disabled,\n *   fonts will be rendered using a built-in font renderer that constructs the\n *   glyphs with primitive path commands. The default value is `false`.\n * @property {boolean} [disableRange] - Disable range request loading\n *   of PDF files. When enabled, and if the server supports partial content\n *   requests, then the PDF will be fetched in chunks.\n *   The default value is `false`.\n * @property {boolean} [disableStream] - Disable streaming of PDF file\n *   data. By default PDF.js attempts to load PDFs in chunks.\n *   The default value is `false`.\n * @property {boolean} [disableAutoFetch] - Disable pre-fetching of PDF\n *   file data. When range requests are enabled PDF.js will automatically keep\n *   fetching more data even if it isn't needed to display the current page.\n *   The default value is `false`.\n *   NOTE: It is also necessary to disable streaming, see above,\n *         in order for disabling of pre-fetching to work correctly.\n * @property {boolean} [disableCreateObjectURL] - Disable the use of\n *   `URL.createObjectURL`, for compatibility with older browsers.\n *   The default value is `false`.\n * @property {boolean} [pdfBug] - Enables special hooks for debugging\n *   PDF.js (see `web/debugger.js`). The default value is `false`.\n */\n\n/**\n * @typedef {Object} PDFDocumentStats\n * @property {Object} streamTypes - Used stream types in the document (an item\n *   is set to true if specific stream ID was used in the document).\n * @property {Object} fontTypes - Used font types in the document (an item\n *   is set to true if specific font ID was used in the document).\n */\n\n/**\n * This is the main entry point for loading a PDF and interacting with it.\n * NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR)\n * is used, which means it must follow the same origin rules that any XHR does\n * e.g. No cross domain requests without CORS.\n *\n * @param {string|TypedArray|DocumentInitParameters|PDFDataRangeTransport} src\n * Can be a url to where a PDF is located, a typed array (Uint8Array)\n * already populated with data or parameter object.\n * @returns {PDFDocumentLoadingTask}\n */\nfunction getDocument(src) {\n  const task = new PDFDocumentLoadingTask();\n\n  let source;\n  if (typeof src === \"string\") {\n    source = { url: src };\n  } else if (isArrayBuffer(src)) {\n    source = { data: src };\n  } else if (src instanceof PDFDataRangeTransport) {\n    source = { range: src };\n  } else {\n    if (typeof src !== \"object\") {\n      throw new Error(\n        \"Invalid parameter in getDocument, \" +\n          \"need either Uint8Array, string or a parameter object\"\n      );\n    }\n    if (!src.url && !src.data && !src.range) {\n      throw new Error(\n        \"Invalid parameter object: need either .data, .range or .url\"\n      );\n    }\n    source = src;\n  }\n  const params = Object.create(null);\n  let rangeTransport = null,\n    worker = null;\n\n  for (const key in source) {\n    if (key === \"url\" && typeof window !== \"undefined\") {\n      // The full path is required in the 'url' field.\n      params[key] = new URL(source[key], window.location).href;\n      continue;\n    } else if (key === \"range\") {\n      rangeTransport = source[key];\n      continue;\n    } else if (key === \"worker\") {\n      worker = source[key];\n      continue;\n    } else if (key === \"data\" && !(source[key] instanceof Uint8Array)) {\n      // Converting string or array-like data to Uint8Array.\n      const pdfBytes = source[key];\n      if (typeof pdfBytes === \"string\") {\n        params[key] = stringToBytes(pdfBytes);\n      } else if (\n        typeof pdfBytes === \"object\" &&\n        pdfBytes !== null &&\n        !isNaN(pdfBytes.length)\n      ) {\n        params[key] = new Uint8Array(pdfBytes);\n      } else if (isArrayBuffer(pdfBytes)) {\n        params[key] = new Uint8Array(pdfBytes);\n      } else {\n        throw new Error(\n          \"Invalid PDF binary data: either typed array, \" +\n            \"string or array-like object is expected in the \" +\n            \"data property.\"\n        );\n      }\n      continue;\n    }\n    params[key] = source[key];\n  }\n\n  params.rangeChunkSize = params.rangeChunkSize || DEFAULT_RANGE_CHUNK_SIZE;\n  params.CMapReaderFactory = params.CMapReaderFactory || DOMCMapReaderFactory;\n  params.ignoreErrors = params.stopAtErrors !== true;\n  params.pdfBug = params.pdfBug === true;\n\n  const NativeImageDecoderValues = Object.values(NativeImageDecoding);\n  if (\n    params.nativeImageDecoderSupport === undefined ||\n    !NativeImageDecoderValues.includes(params.nativeImageDecoderSupport)\n  ) {\n    params.nativeImageDecoderSupport =\n      apiCompatibilityParams.nativeImageDecoderSupport ||\n      NativeImageDecoding.DECODE;\n  }\n  if (!Number.isInteger(params.maxImageSize)) {\n    params.maxImageSize = -1;\n  }\n  if (typeof params.isEvalSupported !== \"boolean\") {\n    params.isEvalSupported = true;\n  }\n  if (typeof params.disableFontFace !== \"boolean\") {\n    params.disableFontFace = apiCompatibilityParams.disableFontFace || false;\n  }\n\n  if (typeof params.disableRange !== \"boolean\") {\n    params.disableRange = false;\n  }\n  if (typeof params.disableStream !== \"boolean\") {\n    params.disableStream = false;\n  }\n  if (typeof params.disableAutoFetch !== \"boolean\") {\n    params.disableAutoFetch = false;\n  }\n  if (typeof params.disableCreateObjectURL !== \"boolean\") {\n    params.disableCreateObjectURL =\n      apiCompatibilityParams.disableCreateObjectURL || false;\n  }\n\n  // Set the main-thread verbosity level.\n  setVerbosityLevel(params.verbosity);\n\n  if (!worker) {\n    const workerParams = {\n      verbosity: params.verbosity,\n      port: GlobalWorkerOptions.workerPort,\n    };\n    // Worker was not provided -- creating and owning our own. If message port\n    // is specified in global worker options, using it.\n    worker = workerParams.port\n      ? PDFWorker.fromPort(workerParams)\n      : new PDFWorker(workerParams);\n    task._worker = worker;\n  }\n  const docId = task.docId;\n  worker.promise\n    .then(function() {\n      if (task.destroyed) {\n        throw new Error(\"Loading aborted\");\n      }\n      return _fetchDocument(worker, params, rangeTransport, docId).then(\n        function(workerId) {\n          if (task.destroyed) {\n            throw new Error(\"Loading aborted\");\n          }\n\n          let networkStream;\n          if (rangeTransport) {\n            networkStream = new PDFDataTransportStream(\n              {\n                length: params.length,\n                initialData: params.initialData,\n                progressiveDone: params.progressiveDone,\n                disableRange: params.disableRange,\n                disableStream: params.disableStream,\n              },\n              rangeTransport\n            );\n          } else if (!params.data) {\n            networkStream = createPDFNetworkStream({\n              url: params.url,\n              length: params.length,\n              httpHeaders: params.httpHeaders,\n              withCredentials: params.withCredentials,\n              rangeChunkSize: params.rangeChunkSize,\n              disableRange: params.disableRange,\n              disableStream: params.disableStream,\n            });\n          }\n\n          const messageHandler = new MessageHandler(\n            docId,\n            workerId,\n            worker.port\n          );\n          messageHandler.postMessageTransfers = worker.postMessageTransfers;\n          const transport = new WorkerTransport(\n            messageHandler,\n            task,\n            networkStream,\n            params\n          );\n          task._transport = transport;\n          messageHandler.send(\"Ready\", null);\n        }\n      );\n    })\n    .catch(task._capability.reject);\n\n  return task;\n}\n\n/**\n * Starts fetching of specified PDF document/data.\n * @param {PDFWorker} worker\n * @param {Object} source\n * @param {PDFDataRangeTransport} pdfDataRangeTransport\n * @param {string} docId Unique document id, used as MessageHandler id.\n * @returns {Promise} The promise, which is resolved when worker id of\n *                    MessageHandler is known.\n * @private\n */\nfunction _fetchDocument(worker, source, pdfDataRangeTransport, docId) {\n  if (worker.destroyed) {\n    return Promise.reject(new Error(\"Worker was destroyed\"));\n  }\n\n  if (pdfDataRangeTransport) {\n    source.length = pdfDataRangeTransport.length;\n    source.initialData = pdfDataRangeTransport.initialData;\n    source.progressiveDone = pdfDataRangeTransport.progressiveDone;\n  }\n  return worker.messageHandler\n    .sendWithPromise(\"GetDocRequest\", {\n      docId,\n      apiVersion:\n        typeof PDFJSDev !== \"undefined\" && !PDFJSDev.test(\"TESTING\")\n          ? PDFJSDev.eval(\"BUNDLE_VERSION\")\n          : null,\n      // Only send the required properties, and *not* the entire object.\n      source: {\n        data: source.data,\n        url: source.url,\n        password: source.password,\n        disableAutoFetch: source.disableAutoFetch,\n        rangeChunkSize: source.rangeChunkSize,\n        length: source.length,\n      },\n      maxImageSize: source.maxImageSize,\n      disableFontFace: source.disableFontFace,\n      disableCreateObjectURL: source.disableCreateObjectURL,\n      postMessageTransfers: worker.postMessageTransfers,\n      docBaseUrl: source.docBaseUrl,\n      nativeImageDecoderSupport: source.nativeImageDecoderSupport,\n      ignoreErrors: source.ignoreErrors,\n      isEvalSupported: source.isEvalSupported,\n    })\n    .then(function(workerId) {\n      if (worker.destroyed) {\n        throw new Error(\"Worker was destroyed\");\n      }\n      return workerId;\n    });\n}\n\nconst PDFDocumentLoadingTask = (function PDFDocumentLoadingTaskClosure() {\n  let nextDocumentId = 0;\n\n  /**\n   * The loading task controls the operations required to load a PDF document\n   * (such as network requests) and provides a way to listen for completion,\n   * after which individual pages can be rendered.\n   */\n  class PDFDocumentLoadingTask {\n    constructor() {\n      this._capability = createPromiseCapability();\n      this._transport = null;\n      this._worker = null;\n\n      /**\n       * Unique document loading task id -- used in MessageHandlers.\n       * @type {string}\n       */\n      this.docId = \"d\" + nextDocumentId++;\n\n      /**\n       * Shows if loading task is destroyed.\n       * @type {boolean}\n       */\n      this.destroyed = false;\n\n      /**\n       * Callback to request a password if wrong or no password was provided.\n       * The callback receives two parameters: function that needs to be called\n       * with new password and reason (see {PasswordResponses}).\n       */\n      this.onPassword = null;\n\n      /**\n       * Callback to be able to monitor the loading progress of the PDF file\n       * (necessary to implement e.g. a loading bar). The callback receives\n       * an {Object} with the properties: {number} loaded and {number} total.\n       */\n      this.onProgress = null;\n\n      /**\n       * Callback to when unsupported feature is used. The callback receives\n       * an {UNSUPPORTED_FEATURES} argument.\n       */\n      this.onUnsupportedFeature = null;\n    }\n\n    /**\n     * Promise for document loading task completion.\n     * @type {Promise}\n     */\n    get promise() {\n      return this._capability.promise;\n    }\n\n    /**\n     * Aborts all network requests and destroys worker.\n     * @returns {Promise} A promise that is resolved after destruction activity\n     *                    is completed.\n     */\n    destroy() {\n      this.destroyed = true;\n\n      const transportDestroyed = !this._transport\n        ? Promise.resolve()\n        : this._transport.destroy();\n      return transportDestroyed.then(() => {\n        this._transport = null;\n        if (this._worker) {\n          this._worker.destroy();\n          this._worker = null;\n        }\n      });\n    }\n\n    /**\n     * Registers callbacks to indicate the document loading completion.\n     * @ignore\n     */\n    then(onFulfilled, onRejected) {\n      throw new Error(\n        \"Removed API method: \" +\n          \"PDFDocumentLoadingTask.then, use the `promise` getter instead.\"\n      );\n    }\n  }\n  return PDFDocumentLoadingTask;\n})();\n\n/**\n * Abstract class to support range requests file loading.\n * @param {number} length\n * @param {Uint8Array} initialData\n * @param {boolean} progressiveDone\n */\nclass PDFDataRangeTransport {\n  constructor(length, initialData, progressiveDone = false) {\n    this.length = length;\n    this.initialData = initialData;\n    this.progressiveDone = progressiveDone;\n\n    this._rangeListeners = [];\n    this._progressListeners = [];\n    this._progressiveReadListeners = [];\n    this._progressiveDoneListeners = [];\n    this._readyCapability = createPromiseCapability();\n  }\n\n  addRangeListener(listener) {\n    this._rangeListeners.push(listener);\n  }\n\n  addProgressListener(listener) {\n    this._progressListeners.push(listener);\n  }\n\n  addProgressiveReadListener(listener) {\n    this._progressiveReadListeners.push(listener);\n  }\n\n  addProgressiveDoneListener(listener) {\n    this._progressiveDoneListeners.push(listener);\n  }\n\n  onDataRange(begin, chunk) {\n    for (const listener of this._rangeListeners) {\n      listener(begin, chunk);\n    }\n  }\n\n  onDataProgress(loaded, total) {\n    this._readyCapability.promise.then(() => {\n      for (const listener of this._progressListeners) {\n        listener(loaded, total);\n      }\n    });\n  }\n\n  onDataProgressiveRead(chunk) {\n    this._readyCapability.promise.then(() => {\n      for (const listener of this._progressiveReadListeners) {\n        listener(chunk);\n      }\n    });\n  }\n\n  onDataProgressiveDone() {\n    this._readyCapability.promise.then(() => {\n      for (const listener of this._progressiveDoneListeners) {\n        listener();\n      }\n    });\n  }\n\n  transportReady() {\n    this._readyCapability.resolve();\n  }\n\n  requestDataRange(begin, end) {\n    unreachable(\"Abstract method PDFDataRangeTransport.requestDataRange\");\n  }\n\n  abort() {}\n}\n\n/**\n * Proxy to a PDFDocument in the worker thread. Also, contains commonly used\n * properties that can be read synchronously.\n */\nclass PDFDocumentProxy {\n  constructor(pdfInfo, transport) {\n    this._pdfInfo = pdfInfo;\n    this._transport = transport;\n  }\n\n  /**\n   * @type {number} Total number of pages the PDF contains.\n   */\n  get numPages() {\n    return this._pdfInfo.numPages;\n  }\n\n  /**\n   * @type {string} A (not guaranteed to be) unique ID to identify a PDF.\n   */\n  get fingerprint() {\n    return this._pdfInfo.fingerprint;\n  }\n\n  /**\n   * @param {number} pageNumber - The page number to get. The first page is 1.\n   * @returns {Promise} A promise that is resolved with a {@link PDFPageProxy}\n   *   object.\n   */\n  getPage(pageNumber) {\n    return this._transport.getPage(pageNumber);\n  }\n\n  /**\n   * @param {{num: number, gen: number}} ref - The page reference. Must have\n   *   the `num` and `gen` properties.\n   * @returns {Promise} A promise that is resolved with the page index (starting\n   *   from zero) that is associated with the reference.\n   */\n  getPageIndex(ref) {\n    return this._transport.getPageIndex(ref);\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with a lookup table for\n   *   mapping named destinations to reference numbers.\n   *\n   * This can be slow for large documents. Use `getDestination` instead.\n   */\n  getDestinations() {\n    return this._transport.getDestinations();\n  }\n\n  /**\n   * @param {string} id - The named destination to get.\n   * @returns {Promise} A promise that is resolved with all information\n   *   of the given named destination.\n   */\n  getDestination(id) {\n    return this._transport.getDestination(id);\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with an {Array} containing\n   *   the page labels that correspond to the page indexes, or `null` when\n   *   no page labels are present in the PDF file.\n   */\n  getPageLabels() {\n    return this._transport.getPageLabels();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with a {string} containing\n   *   the page layout name.\n   */\n  getPageLayout() {\n    return this._transport.getPageLayout();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with a {string} containing\n   *   the page mode name.\n   */\n  getPageMode() {\n    return this._transport.getPageMode();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with an {Object} containing\n   *   the viewer preferences.\n   */\n  getViewerPreferences() {\n    return this._transport.getViewerPreferences();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with an {Object} containing\n   *   the currently supported actions, or `null` when no OpenAction exists.\n   */\n  getOpenAction() {\n    return this._transport.getOpenAction();\n  }\n\n  getOpenActionDestination() {\n    deprecated(\"getOpenActionDestination, use getOpenAction instead.\");\n    return this.getOpenAction().then(function(openAction) {\n      return openAction && openAction.dest ? openAction.dest : null;\n    });\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with a lookup table for\n   *   mapping named attachments to their content.\n   */\n  getAttachments() {\n    return this._transport.getAttachments();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with an {Array} of all the\n   *   JavaScript strings in the name tree, or `null` if no JavaScript exists.\n   */\n  getJavaScript() {\n    return this._transport.getJavaScript();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with an {Array} that is a\n   * tree outline (if it has one) of the PDF. The tree is in the format of:\n   * [\n   *   {\n   *     title: string,\n   *     bold: boolean,\n   *     italic: boolean,\n   *     color: rgb Uint8ClampedArray,\n   *     count: integer or undefined,\n   *     dest: dest obj,\n   *     url: string,\n   *     items: array of more items like this\n   *   },\n   *   ...\n   * ]\n   */\n  getOutline() {\n    return this._transport.getOutline();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with an {Array} that contains\n   *   the permission flags for the PDF document, or `null` when\n   *   no permissions are present in the PDF file.\n   */\n  getPermissions() {\n    return this._transport.getPermissions();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with an {Object} that has\n   *   `info` and `metadata` properties. `info` is an {Object} filled with\n   *   anything available in the information dictionary and similarly\n   *   `metadata` is a {Metadata} object with information from the metadata\n   *   section of the PDF.\n   */\n  getMetadata() {\n    return this._transport.getMetadata();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved with a {TypedArray} that has\n   *   the raw data from the PDF.\n   */\n  getData() {\n    return this._transport.getData();\n  }\n\n  /**\n   * @returns {Promise} A promise that is resolved when the document's data\n   *   is loaded. It is resolved with an {Object} that contains the `length`\n   *   property that indicates size of the PDF data in bytes.\n   */\n  getDownloadInfo() {\n    return this._transport.downloadInfoCapability.promise;\n  }\n\n  /**\n   * @returns {Promise} A promise this is resolved with current statistics about\n   *   document structures (see {@link PDFDocumentStats}).\n   */\n  getStats() {\n    return this._transport.getStats();\n  }\n\n  /**\n   * Cleans up resources allocated by the document, on both the main- and\n   * worker-threads.\n   *\n   * NOTE: Do not, under any circumstances, call this method when rendering is\n   *       currently ongoing since that may lead to rendering errors.\n   *\n   * @returns {Promise} A promise that is resolved when clean-up has finished.\n   */\n  cleanup() {\n    return this._transport.startCleanup();\n  }\n\n  /**\n   * Destroys the current document instance and terminates the worker.\n   */\n  destroy() {\n    return this.loadingTask.destroy();\n  }\n\n  /**\n   * @type {Object} A subset of the current {DocumentInitParameters}, which are\n   *   either needed in the viewer and/or whose default values may be affected\n   *   by the `apiCompatibilityParams`.\n   */\n  get loadingParams() {\n    return this._transport.loadingParams;\n  }\n\n  /**\n   * @type {PDFDocumentLoadingTask} The loadingTask for the current document.\n   */\n  get loadingTask() {\n    return this._transport.loadingTask;\n  }\n}\n\n/**\n * Page getViewport parameters.\n *\n * @typedef {Object} GetViewportParameters\n * @property {number} scale - The desired scale of the viewport.\n * @property {number} [rotation] - The desired rotation, in degrees, of\n *   the viewport. If omitted it defaults to the page rotation.\n * @property {number} [offsetX] - The horizontal, i.e. x-axis, offset.\n *   The default value is `0`.\n * @property {number} [offsetY] - The vertical, i.e. y-axis, offset.\n *   The default value is `0`.\n * @property {boolean} [dontFlip] - If true, the y-axis will not be\n *   flipped. The default value is `false`.\n */\n\n/**\n * Page getTextContent parameters.\n *\n * @typedef {Object} getTextContentParameters\n * @property {boolean} normalizeWhitespace - replaces all occurrences of\n *   whitespace with standard spaces (0x20). The default value is `false`.\n * @property {boolean} disableCombineTextItems - do not attempt to combine\n *   same line {@link TextItem}'s. The default value is `false`.\n */\n\n/**\n * Page text content.\n *\n * @typedef {Object} TextContent\n * @property {array} items - array of {@link TextItem}\n * @property {Object} styles - {@link TextStyle} objects, indexed by font name.\n */\n\n/**\n * Page text content part.\n *\n * @typedef {Object} TextItem\n * @property {string} str - text content.\n * @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'.\n * @property {array} transform - transformation matrix.\n * @property {number} width - width in device space.\n * @property {number} height - height in device space.\n * @property {string} fontName - font name used by pdf.js for converted font.\n */\n\n/**\n * Text style.\n *\n * @typedef {Object} TextStyle\n * @property {number} ascent - font ascent.\n * @property {number} descent - font descent.\n * @property {boolean} vertical - text is in vertical mode.\n * @property {string} fontFamily - possible font family\n */\n\n/**\n * Page annotation parameters.\n *\n * @typedef {Object} GetAnnotationsParameters\n * @property {string} intent - Determines the annotations that will be fetched,\n *                    can be either 'display' (viewable annotations) or 'print'\n *                    (printable annotations).\n *                    If the parameter is omitted, all annotations are fetched.\n */\n\n/**\n * Page render parameters.\n *\n * @typedef {Object} RenderParameters\n * @property {Object} canvasContext - A 2D context of a DOM Canvas object.\n * @property {PageViewport} viewport - Rendering viewport obtained by\n *                          calling the `PDFPageProxy.getViewport` method.\n * @property {string} [intent] - Rendering intent, can be 'display' or 'print'\n *                    (default value is 'display').\n * @property {boolean} [enableWebGL] - Enables WebGL accelerated rendering\n *                     for some operations. The default value is `false`.\n * @property {boolean} [renderInteractiveForms] - Whether or not\n *                     interactive form elements are rendered in the display\n *                     layer. If so, we do not render them on canvas as well.\n * @property {Array}  [transform] - Additional transform, applied\n *                    just before viewport transform.\n * @property {Object} [imageLayer] - An object that has beginLayout,\n *                    endLayout and appendImage functions.\n * @property {Object} [canvasFactory] - The factory that will be used\n *                    when creating canvases. The default value is\n *                    {DOMCanvasFactory}.\n * @property {Object} [background] - Background to use for the canvas.\n *                    Can use any valid canvas.fillStyle: A DOMString parsed as\n *                    CSS <color> value, a CanvasGradient object (a linear or\n *                    radial gradient) or a CanvasPattern object (a repetitive\n *                    image). The default value is 'rgb(255,255,255)'.\n */\n\n/**\n * PDF page operator list.\n *\n * @typedef {Object} PDFOperatorList\n * @property {Array} fnArray - Array containing the operator functions.\n * @property {Array} argsArray - Array containing the arguments of the\n *                               functions.\n */\n\n/**\n * Proxy to a PDFPage in the worker thread.\n * @alias PDFPageProxy\n */\nclass PDFPageProxy {\n  constructor(pageIndex, pageInfo, transport, pdfBug = false) {\n    this._pageIndex = pageIndex;\n    this._pageInfo = pageInfo;\n    this._transport = transport;\n    this._stats = pdfBug ? new StatTimer() : null;\n    this._pdfBug = pdfBug;\n    this.commonObjs = transport.commonObjs;\n    this.objs = new PDFObjects();\n\n    this.cleanupAfterRender = false;\n    this.pendingCleanup = false;\n    this.intentStates = Object.create(null);\n    this.destroyed = false;\n  }\n\n  /**\n   * @type {number} Page number of the page. First page is 1.\n   */\n  get pageNumber() {\n    return this._pageIndex + 1;\n  }\n\n  /**\n   * @type {number} The number of degrees the page is rotated clockwise.\n   */\n  get rotate() {\n    return this._pageInfo.rotate;\n  }\n\n  /**\n   * @type {Object} The reference that points to this page. It has `num` and\n   *   `gen` properties.\n   */\n  get ref() {\n    return this._pageInfo.ref;\n  }\n\n  /**\n   * @type {number} The default size of units in 1/72nds of an inch.\n   */\n  get userUnit() {\n    return this._pageInfo.userUnit;\n  }\n\n  /**\n   * @type {Array} An array of the visible portion of the PDF page in user\n   *   space units [x1, y1, x2, y2].\n   */\n  get view() {\n    return this._pageInfo.view;\n  }\n\n  /**\n   * @param {GetViewportParameters} params - Viewport parameters.\n   * @returns {PageViewport} Contains 'width' and 'height' properties\n   *   along with transforms required for rendering.\n   */\n  getViewport({\n    scale,\n    rotation = this.rotate,\n    offsetX = 0,\n    offsetY = 0,\n    dontFlip = false,\n  } = {}) {\n    if (\n      typeof PDFJSDev !== \"undefined\" &&\n      PDFJSDev.test(\"GENERIC\") &&\n      (arguments.length > 1 || typeof arguments[0] === \"number\")\n    ) {\n      throw new Error(\n        \"PDFPageProxy.getViewport is called with obsolete arguments.\"\n      );\n    }\n    return new PageViewport({\n      viewBox: this.view,\n      scale,\n      rotation,\n      offsetX,\n      offsetY,\n      dontFlip,\n    });\n  }\n\n  /**\n   * @param {GetAnnotationsParameters} params - Annotation parameters.\n   * @returns {Promise} A promise that is resolved with an {Array} of the\n   *   annotation objects.\n   */\n  getAnnotations({ intent = null } = {}) {\n    if (!this.annotationsPromise || this.annotationsIntent !== intent) {\n      this.annotationsPromise = this._transport.getAnnotations(\n        this._pageIndex,\n        intent\n      );\n      this.annotationsIntent = intent;\n    }\n    return this.annotationsPromise;\n  }\n\n  /**\n   * Begins the process of rendering a page to the desired context.\n   * @param {RenderParameters} params Page render parameters.\n   * @returns {RenderTask} An object that contains the promise, which\n   *                       is resolved when the page finishes rendering.\n   */\n  render({\n    canvasContext,\n    viewport,\n    intent = \"display\",\n    enableWebGL = false,\n    renderInteractiveForms = false,\n    transform = null,\n    imageLayer = null,\n    canvasFactory = null,\n    background = null,\n  }) {\n    if (this._stats) {\n      this._stats.time(\"Overall\");\n    }\n\n    const renderingIntent = intent === \"print\" ? \"print\" : \"display\";\n    // If there was a pending destroy, cancel it so no cleanup happens during\n    // this call to render.\n    this.pendingCleanup = false;\n\n    if (!this.intentStates[renderingIntent]) {\n      this.intentStates[renderingIntent] = Object.create(null);\n    }\n    const intentState = this.intentStates[renderingIntent];\n\n    // Ensure that a pending `streamReader` cancel timeout is always aborted.\n    if (intentState.streamReaderCancelTimeout) {\n      clearTimeout(intentState.streamReaderCancelTimeout);\n      intentState.streamReaderCancelTimeout = null;\n    }\n\n    const canvasFactoryInstance = canvasFactory || new DOMCanvasFactory();\n    const webGLContext = new WebGLContext({\n      enable: enableWebGL,\n    });\n\n    // If there's no displayReadyCapability yet, then the operatorList\n    // was never requested before. Make the request and create the promise.\n    if (!intentState.displayReadyCapability) {\n      intentState.displayReadyCapability = createPromiseCapability();\n      intentState.operatorList = {\n        fnArray: [],\n        argsArray: [],\n        lastChunk: false,\n      };\n\n      if (this._stats) {\n        this._stats.time(\"Page Request\");\n      }\n      this._pumpOperatorList({\n        pageIndex: this._pageIndex,\n        intent: renderingIntent,\n        renderInteractiveForms: renderInteractiveForms === true,\n      });\n    }\n\n    const complete = error => {\n      const i = intentState.renderTasks.indexOf(internalRenderTask);\n      if (i >= 0) {\n        intentState.renderTasks.splice(i, 1);\n      }\n\n      // Attempt to reduce memory usage during *printing*, by always running\n      // cleanup once rendering has finished (regardless of cleanupAfterRender).\n      if (this.cleanupAfterRender || renderingIntent === \"print\") {\n        this.pendingCleanup = true;\n      }\n      this._tryCleanup();\n\n      if (error) {\n        internalRenderTask.capability.reject(error);\n\n        this._abortOperatorList({\n          intentState,\n          reason: error,\n        });\n      } else {\n        internalRenderTask.capability.resolve();\n      }\n      if (this._stats) {\n        this._stats.timeEnd(\"Rendering\");\n        this._stats.timeEnd(\"Overall\");\n      }\n    };\n\n    const internalRenderTask = new InternalRenderTask({\n      callback: complete,\n      // Only include the required properties, and *not* the entire object.\n      params: {\n        canvasContext,\n        viewport,\n        transform,\n        imageLayer,\n        background,\n      },\n      objs: this.objs,\n      commonObjs: this.commonObjs,\n      operatorList: intentState.operatorList,\n      pageIndex: this._pageIndex,\n      canvasFactory: canvasFactoryInstance,\n      webGLContext,\n      useRequestAnimationFrame: renderingIntent !== \"print\",\n      pdfBug: this._pdfBug,\n    });\n\n    if (!intentState.renderTasks) {\n      intentState.renderTasks = [];\n    }\n    intentState.renderTasks.push(internalRenderTask);\n    const renderTask = internalRenderTask.task;\n\n    intentState.displayReadyCapability.promise\n      .then(transparency => {\n        if (this.pendingCleanup) {\n          complete();\n          return;\n        }\n        if (this._stats) {\n          this._stats.time(\"Rendering\");\n        }\n        internalRenderTask.initializeGraphics(transparency);\n        internalRenderTask.operatorListChanged();\n      })\n      .catch(complete);\n\n    return renderTask;\n  }\n\n  /**\n   * @returns {Promise} A promise resolved with an {@link PDFOperatorList}\n   *   object that represents page's operator list.\n   */\n  getOperatorList() {\n    function operatorListChanged() {\n      if (intentState.operatorList.lastChunk) {\n        intentState.opListReadCapability.resolve(intentState.operatorList);\n\n        const i = intentState.renderTasks.indexOf(opListTask);\n        if (i >= 0) {\n          intentState.renderTasks.splice(i, 1);\n        }\n      }\n    }\n\n    const renderingIntent = \"oplist\";\n    if (!this.intentStates[renderingIntent]) {\n      this.intentStates[renderingIntent] = Object.create(null);\n    }\n    const intentState = this.intentStates[renderingIntent];\n    let opListTask;\n\n    if (!intentState.opListReadCapability) {\n      opListTask = {};\n      opListTask.operatorListChanged = operatorListChanged;\n      intentState.opListReadCapability = createPromiseCapability();\n      intentState.renderTasks = [];\n      intentState.renderTasks.push(opListTask);\n      intentState.operatorList = {\n        fnArray: [],\n        argsArray: [],\n        lastChunk: false,\n      };\n\n      if (this._stats) {\n        this._stats.time(\"Page Request\");\n      }\n      this._pumpOperatorList({\n        pageIndex: this._pageIndex,\n        intent: renderingIntent,\n      });\n    }\n    return intentState.opListReadCapability.promise;\n  }\n\n  /**\n   * @param {getTextContentParameters} params - getTextContent parameters.\n   * @returns {ReadableStream} ReadableStream to read textContent chunks.\n   */\n  streamTextContent({\n    normalizeWhitespace = false,\n    disableCombineTextItems = false,\n  } = {}) {\n    const TEXT_CONTENT_CHUNK_SIZE = 100;\n\n    return this._transport.messageHandler.sendWithStream(\n      \"GetTextContent\",\n      {\n        pageIndex: this._pageIndex,\n        normalizeWhitespace: normalizeWhitespace === true,\n        combineTextItems: disableCombineTextItems !== true,\n      },\n      {\n        highWaterMark: TEXT_CONTENT_CHUNK_SIZE,\n        size(textContent) {\n          return textContent.items.length;\n        },\n      }\n    );\n  }\n\n  /**\n   * @param {getTextContentParameters} params - getTextContent parameters.\n   * @returns {Promise} That is resolved a {@link TextContent}\n   *   object that represent the page text content.\n   */\n  getTextContent(params = {}) {\n    const readableStream = this.streamTextContent(params);\n\n    return new Promise(function(resolve, reject) {\n      function pump() {\n        reader.read().then(function({ value, done }) {\n          if (done) {\n            resolve(textContent);\n            return;\n          }\n          Object.assign(textContent.styles, value.styles);\n          textContent.items.push(...value.items);\n          pump();\n        }, reject);\n      }\n\n      const reader = readableStream.getReader();\n      const textContent = {\n        items: [],\n        styles: Object.create(null),\n      };\n      pump();\n    });\n  }\n\n  /**\n   * Destroys the page object.\n   * @private\n   */\n  _destroy() {\n    this.destroyed = true;\n    this._transport.pageCache[this._pageIndex] = null;\n\n    const waitOn = [];\n    Object.keys(this.intentStates).forEach(intent => {\n      const intentState = this.intentStates[intent];\n      this._abortOperatorList({\n        intentState,\n        reason: new Error(\"Page was destroyed.\"),\n        force: true,\n      });\n\n      if (intent === \"oplist\") {\n        // Avoid errors below, since the renderTasks are just stubs.\n        return;\n      }\n      intentState.renderTasks.forEach(function(renderTask) {\n        const renderCompleted = renderTask.capability.promise.catch(\n          function() {}\n        ); // ignoring failures\n        waitOn.push(renderCompleted);\n        renderTask.cancel();\n      });\n    });\n    this.objs.clear();\n    this.annotationsPromise = null;\n    this.pendingCleanup = false;\n    return Promise.all(waitOn);\n  }\n\n  /**\n   * Cleans up resources allocated by the page.\n   * @param {boolean} [resetStats] - Reset page stats, if enabled.\n   *   The default value is `false`.\n   * @returns {boolean} Indicating if clean-up was successfully run.\n   */\n  cleanup(resetStats = false) {\n    this.pendingCleanup = true;\n    return this._tryCleanup(resetStats);\n  }\n\n  /**\n   * Attempts to clean up if rendering is in a state where that's possible.\n   * @private\n   */\n  _tryCleanup(resetStats = false) {\n    if (\n      !this.pendingCleanup ||\n      Object.keys(this.intentStates).some(intent => {\n        const intentState = this.intentStates[intent];\n        return (\n          intentState.renderTasks.length !== 0 ||\n          !intentState.operatorList.lastChunk\n        );\n      })\n    ) {\n      return false;\n    }\n\n    Object.keys(this.intentStates).forEach(intent => {\n      delete this.intentStates[intent];\n    });\n    this.objs.clear();\n    this.annotationsPromise = null;\n    if (resetStats && this._stats) {\n      this._stats = new StatTimer();\n    }\n    this.pendingCleanup = false;\n    return true;\n  }\n\n  /**\n   * @private\n   */\n  _startRenderPage(transparency, intent) {\n    const intentState = this.intentStates[intent];\n    if (!intentState) {\n      return; // Rendering was cancelled.\n    }\n    if (this._stats) {\n      this._stats.timeEnd(\"Page Request\");\n    }\n    // TODO Refactor RenderPageRequest to separate rendering\n    // and operator list logic\n    if (intentState.displayReadyCapability) {\n      intentState.displayReadyCapability.resolve(transparency);\n    }\n  }\n\n  /**\n   * @private\n   */\n  _renderPageChunk(operatorListChunk, intentState) {\n    // Add the new chunk to the current operator list.\n    for (let i = 0, ii = operatorListChunk.length; i < ii; i++) {\n      intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]);\n      intentState.operatorList.argsArray.push(operatorListChunk.argsArray[i]);\n    }\n    intentState.operatorList.lastChunk = operatorListChunk.lastChunk;\n\n    // Notify all the rendering tasks there are more operators to be consumed.\n    for (let i = 0; i < intentState.renderTasks.length; i++) {\n      intentState.renderTasks[i].operatorListChanged();\n    }\n\n    if (operatorListChunk.lastChunk) {\n      this._tryCleanup();\n    }\n  }\n\n  /**\n   * @private\n   */\n  _pumpOperatorList(args) {\n    assert(\n      args.intent,\n      'PDFPageProxy._pumpOperatorList: Expected \"intent\" argument.'\n    );\n\n    const readableStream = this._transport.messageHandler.sendWithStream(\n      \"GetOperatorList\",\n      args\n    );\n    const reader = readableStream.getReader();\n\n    const intentState = this.intentStates[args.intent];\n    intentState.streamReader = reader;\n\n    const pump = () => {\n      reader.read().then(\n        ({ value, done }) => {\n          if (done) {\n            intentState.streamReader = null;\n            return;\n          }\n          if (this._transport.destroyed) {\n            return; // Ignore any pending requests if the worker was terminated.\n          }\n          this._renderPageChunk(value, intentState);\n          pump();\n        },\n        reason => {\n          intentState.streamReader = null;\n\n          if (this._transport.destroyed) {\n            return; // Ignore any pending requests if the worker was terminated.\n          }\n          if (intentState.operatorList) {\n            // Mark operator list as complete.\n            intentState.operatorList.lastChunk = true;\n\n            for (let i = 0; i < intentState.renderTasks.length; i++) {\n              intentState.renderTasks[i].operatorListChanged();\n            }\n            this._tryCleanup();\n          }\n\n          if (intentState.displayReadyCapability) {\n            intentState.displayReadyCapability.reject(reason);\n          } else if (intentState.opListReadCapability) {\n            intentState.opListReadCapability.reject(reason);\n          } else {\n            throw reason;\n          }\n        }\n      );\n    };\n    pump();\n  }\n\n  /**\n   * @private\n   */\n  _abortOperatorList({ intentState, reason, force = false }) {\n    assert(\n      reason instanceof Error ||\n        (typeof reason === \"object\" && reason !== null),\n      'PDFPageProxy._abortOperatorList: Expected \"reason\" argument.'\n    );\n\n    if (!intentState.streamReader) {\n      return;\n    }\n    if (!force) {\n      // Ensure that an Error occurring in *only* one `InternalRenderTask`, e.g.\n      // multiple render() calls on the same canvas, won't break all rendering.\n      if (intentState.renderTasks.length !== 0) {\n        return;\n      }\n      // Don't immediately abort parsing on the worker-thread when rendering is\n      // cancelled, since that will unnecessarily delay re-rendering when (for\n      // partially parsed pages) e.g. zooming/rotation occurs in the viewer.\n      if (reason instanceof RenderingCancelledException) {\n        intentState.streamReaderCancelTimeout = setTimeout(() => {\n          this._abortOperatorList({ intentState, reason, force: true });\n          intentState.streamReaderCancelTimeout = null;\n        }, RENDERING_CANCELLED_TIMEOUT);\n        return;\n      }\n    }\n    intentState.streamReader.cancel(\n      new AbortException(reason && reason.message)\n    );\n    intentState.streamReader = null;\n\n    if (this._transport.destroyed) {\n      return; // Ignore any pending requests if the worker was terminated.\n    }\n    // Remove the current `intentState`, since a cancelled `getOperatorList`\n    // call on the worker-thread cannot be re-started...\n    Object.keys(this.intentStates).some(intent => {\n      if (this.intentStates[intent] === intentState) {\n        delete this.intentStates[intent];\n        return true;\n      }\n      return false;\n    });\n    // ... and force clean-up to ensure that any old state is always removed.\n    this.cleanup();\n  }\n\n  /**\n   * @type {Object} Returns page stats, if enabled; returns `null` otherwise.\n   */\n  get stats() {\n    return this._stats;\n  }\n}\n\nclass LoopbackPort {\n  constructor(defer = true) {\n    this._listeners = [];\n    this._defer = defer;\n    this._deferred = Promise.resolve(undefined);\n  }\n\n  postMessage(obj, transfers) {\n    function cloneValue(value) {\n      // Trying to perform a structured clone close to the spec, including\n      // transfers.\n      if (typeof value !== \"object\" || value === null) {\n        return value;\n      }\n      if (cloned.has(value)) {\n        // already cloned the object\n        return cloned.get(value);\n      }\n      let buffer, result;\n      if ((buffer = value.buffer) && isArrayBuffer(buffer)) {\n        // We found object with ArrayBuffer (typed array).\n        const transferable = transfers && transfers.includes(buffer);\n        if (transferable) {\n          result = new value.constructor(\n            buffer,\n            value.byteOffset,\n            value.byteLength\n          );\n        } else {\n          result = new value.constructor(value);\n        }\n        cloned.set(value, result);\n        return result;\n      }\n      result = Array.isArray(value) ? [] : {};\n      cloned.set(value, result); // adding to cache now for cyclic references\n      // Cloning all value and object properties, however ignoring properties\n      // defined via getter.\n      for (const i in value) {\n        let desc,\n          p = value;\n        while (!(desc = Object.getOwnPropertyDescriptor(p, i))) {\n          p = Object.getPrototypeOf(p);\n        }\n        if (typeof desc.value === \"undefined\") {\n          continue;\n        }\n        if (typeof desc.value === \"function\") {\n          if (value.hasOwnProperty && value.hasOwnProperty(i)) {\n            throw new Error(\n              `LoopbackPort.postMessage - cannot clone: ${value[i]}`\n            );\n          }\n          continue;\n        }\n        result[i] = cloneValue(desc.value);\n      }\n      return result;\n    }\n\n    if (!this._defer) {\n      this._listeners.forEach(listener => {\n        listener.call(this, { data: obj });\n      });\n      return;\n    }\n\n    const cloned = new WeakMap();\n    const e = { data: cloneValue(obj) };\n    this._deferred.then(() => {\n      this._listeners.forEach(listener => {\n        listener.call(this, e);\n      });\n    });\n  }\n\n  addEventListener(name, listener) {\n    this._listeners.push(listener);\n  }\n\n  removeEventListener(name, listener) {\n    const i = this._listeners.indexOf(listener);\n    this._listeners.splice(i, 1);\n  }\n\n  terminate() {\n    this._listeners.length = 0;\n  }\n}\n\n/**\n * @typedef {Object} PDFWorkerParameters\n * @property {string} [name] - The name of the worker.\n * @property {Object} [port] - The `workerPort`.\n * @property {number} [verbosity] - Controls the logging level; the\n *   constants from {VerbosityLevel} should be used.\n */\n\nconst PDFWorker = (function PDFWorkerClosure() {\n  const pdfWorkerPorts = new WeakMap();\n  let isWorkerDisabled = false;\n  let fallbackWorkerSrc;\n  let nextFakeWorkerId = 0;\n  let fakeWorkerCapability;\n\n  if (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"GENERIC\")) {\n    // eslint-disable-next-line no-undef\n    if (isNodeJS && typeof __non_webpack_require__ === \"function\") {\n      // Workers aren't supported in Node.js, force-disabling them there.\n      isWorkerDisabled = true;\n\n      if (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"LIB\")) {\n        fallbackWorkerSrc = \"../pdf.worker.js\";\n      } else {\n        fallbackWorkerSrc = \"./pdf.worker.js\";\n      }\n    } else if (typeof document === \"object\" && \"currentScript\" in document) {\n      const pdfjsFilePath =\n        document.currentScript && document.currentScript.src;\n      if (pdfjsFilePath) {\n        fallbackWorkerSrc = pdfjsFilePath.replace(\n          /(\\.(?:min\\.)?js)(\\?.*)?$/i,\n          \".worker$1$2\"\n        );\n      }\n    }\n  }\n\n  function getWorkerSrc() {\n    if (GlobalWorkerOptions.workerSrc) {\n      return GlobalWorkerOptions.workerSrc;\n    }\n    if (typeof fallbackWorkerSrc !== \"undefined\") {\n      if (!isNodeJS) {\n        deprecated('No \"GlobalWorkerOptions.workerSrc\" specified.');\n      }\n      return fallbackWorkerSrc;\n    }\n    throw new Error('No \"GlobalWorkerOptions.workerSrc\" specified.');\n  }\n\n  function getMainThreadWorkerMessageHandler() {\n    let mainWorkerMessageHandler;\n    try {\n      mainWorkerMessageHandler =\n        globalThis.pdfjsWorker && globalThis.pdfjsWorker.WorkerMessageHandler;\n    } catch (ex) {\n      /* Ignore errors. */\n    }\n    return mainWorkerMessageHandler || null;\n  }\n\n  // Loads worker code into main thread.\n  function setupFakeWorkerGlobal() {\n    if (fakeWorkerCapability) {\n      return fakeWorkerCapability.promise;\n    }\n    fakeWorkerCapability = createPromiseCapability();\n\n    const loader = async function() {\n      const mainWorkerMessageHandler = getMainThreadWorkerMessageHandler();\n\n      if (mainWorkerMessageHandler) {\n        // The worker was already loaded using e.g. a `<script>` tag.\n        return mainWorkerMessageHandler;\n      }\n      if (typeof PDFJSDev === \"undefined\" || !PDFJSDev.test(\"PRODUCTION\")) {\n        if (typeof SystemJS !== \"object\") {\n          throw new Error(\"SystemJS must be used to load fake worker.\");\n        }\n        const worker = await SystemJS.import(\"pdfjs/core/worker.js\");\n        return worker.WorkerMessageHandler;\n      }\n      if (\n        PDFJSDev.test(\"GENERIC\") &&\n        isNodeJS &&\n        // eslint-disable-next-line no-undef\n        typeof __non_webpack_require__ === \"function\"\n      ) {\n        // Since bundlers, such as Webpack, cannot be told to leave `require`\n        // statements alone we are thus forced to jump through hoops in order\n        // to prevent `Critical dependency: ...` warnings in third-party\n        // deployments of the built `pdf.js`/`pdf.worker.js` files; see\n        // https://github.com/webpack/webpack/issues/8826\n        //\n        // The following hack is based on the assumption that code running in\n        // Node.js won't ever be affected by e.g. Content Security Policies that\n        // prevent the use of `eval`. If that ever occurs, we should revert this\n        // to a normal `__non_webpack_require__` statement and simply document\n        // the Webpack warnings instead (telling users to ignore them).\n        //\n        // eslint-disable-next-line no-eval\n        const worker = eval(\"require\")(getWorkerSrc());\n        return worker.WorkerMessageHandler;\n      }\n      await loadScript(getWorkerSrc());\n      return window.pdfjsWorker.WorkerMessageHandler;\n    };\n    loader().then(fakeWorkerCapability.resolve, fakeWorkerCapability.reject);\n\n    return fakeWorkerCapability.promise;\n  }\n\n  function createCDNWrapper(url) {\n    // We will rely on blob URL's property to specify origin.\n    // We want this function to fail in case if createObjectURL or Blob do not\n    // exist or fail for some reason -- our Worker creation will fail anyway.\n    const wrapper = \"importScripts('\" + url + \"');\";\n    return URL.createObjectURL(new Blob([wrapper]));\n  }\n\n  /**\n   * PDF.js web worker abstraction, which controls the instantiation of PDF\n   * documents. Message handlers are used to pass information from the main\n   * thread to the worker thread and vice versa. If the creation of a web\n   * worker is not possible, a \"fake\" worker will be used instead.\n   */\n  class PDFWorker {\n    /**\n     * @param {PDFWorkerParameters} params - Worker initialization parameters.\n     */\n    constructor({\n      name = null,\n      port = null,\n      verbosity = getVerbosityLevel(),\n    } = {}) {\n      if (port && pdfWorkerPorts.has(port)) {\n        throw new Error(\"Cannot use more than one PDFWorker per port\");\n      }\n\n      this.name = name;\n      this.destroyed = false;\n      this.postMessageTransfers = true;\n      this.verbosity = verbosity;\n\n      this._readyCapability = createPromiseCapability();\n      this._port = null;\n      this._webWorker = null;\n      this._messageHandler = null;\n\n      if (port) {\n        pdfWorkerPorts.set(port, this);\n        this._initializeFromPort(port);\n        return;\n      }\n      this._initialize();\n    }\n\n    get promise() {\n      return this._readyCapability.promise;\n    }\n\n    get port() {\n      return this._port;\n    }\n\n    get messageHandler() {\n      return this._messageHandler;\n    }\n\n    _initializeFromPort(port) {\n      this._port = port;\n      this._messageHandler = new MessageHandler(\"main\", \"worker\", port);\n      this._messageHandler.on(\"ready\", function() {\n        // Ignoring 'ready' event -- MessageHandler shall be already initialized\n        // and ready to accept the messages.\n      });\n      this._readyCapability.resolve();\n    }\n\n    _initialize() {\n      // If worker support isn't disabled explicit and the browser has worker\n      // support, create a new web worker and test if it/the browser fulfills\n      // all requirements to run parts of pdf.js in a web worker.\n      // Right now, the requirement is, that an Uint8Array is still an\n      // Uint8Array as it arrives on the worker. (Chrome added this with v.15.)\n      if (\n        typeof Worker !== \"undefined\" &&\n        !isWorkerDisabled &&\n        !getMainThreadWorkerMessageHandler()\n      ) {\n        let workerSrc = getWorkerSrc();\n\n        try {\n          // Wraps workerSrc path into blob URL, if the former does not belong\n          // to the same origin.\n          if (\n            typeof PDFJSDev !== \"undefined\" &&\n            PDFJSDev.test(\"GENERIC\") &&\n            !isSameOrigin(window.location.href, workerSrc)\n          ) {\n            workerSrc = createCDNWrapper(\n              new URL(workerSrc, window.location).href\n            );\n          }\n\n          // Some versions of FF can't create a worker on localhost, see:\n          // https://bugzilla.mozilla.org/show_bug.cgi?id=683280\n          const worker = new Worker(workerSrc);\n          const messageHandler = new MessageHandler(\"main\", \"worker\", worker);\n          const terminateEarly = () => {\n            worker.removeEventListener(\"error\", onWorkerError);\n            messageHandler.destroy();\n            worker.terminate();\n            if (this.destroyed) {\n              this._readyCapability.reject(new Error(\"Worker was destroyed\"));\n            } else {\n              // Fall back to fake worker if the termination is caused by an\n              // error (e.g. NetworkError / SecurityError).\n              this._setupFakeWorker();\n            }\n          };\n\n          const onWorkerError = () => {\n            if (!this._webWorker) {\n              // Worker failed to initialize due to an error. Clean up and fall\n              // back to the fake worker.\n              terminateEarly();\n            }\n          };\n          worker.addEventListener(\"error\", onWorkerError);\n\n          messageHandler.on(\"test\", data => {\n            worker.removeEventListener(\"error\", onWorkerError);\n            if (this.destroyed) {\n              terminateEarly();\n              return; // worker was destroyed\n            }\n            if (data) {\n              // supportTypedArray\n              this._messageHandler = messageHandler;\n              this._port = worker;\n              this._webWorker = worker;\n              if (!data.supportTransfers) {\n                this.postMessageTransfers = false;\n              }\n              this._readyCapability.resolve();\n              // Send global setting, e.g. verbosity level.\n              messageHandler.send(\"configure\", {\n                verbosity: this.verbosity,\n              });\n            } else {\n              this._setupFakeWorker();\n              messageHandler.destroy();\n              worker.terminate();\n            }\n          });\n\n          messageHandler.on(\"ready\", data => {\n            worker.removeEventListener(\"error\", onWorkerError);\n            if (this.destroyed) {\n              terminateEarly();\n              return; // worker was destroyed\n            }\n            try {\n              sendTest();\n            } catch (e) {\n              // We need fallback to a faked worker.\n              this._setupFakeWorker();\n            }\n          });\n\n          const sendTest = () => {\n            const testObj = new Uint8Array([\n              this.postMessageTransfers ? 255 : 0,\n            ]);\n            // Some versions of Opera throw a DATA_CLONE_ERR on serializing the\n            // typed array. Also, checking if we can use transfers.\n            try {\n              messageHandler.send(\"test\", testObj, [testObj.buffer]);\n            } catch (ex) {\n              warn(\"Cannot use postMessage transfers.\");\n              testObj[0] = 0;\n              messageHandler.send(\"test\", testObj);\n            }\n          };\n\n          // It might take time for worker to initialize (especially when AMD\n          // loader is used). We will try to send test immediately, and then\n          // when 'ready' message will arrive. The worker shall process only\n          // first received 'test'.\n          sendTest();\n          return;\n        } catch (e) {\n          info(\"The worker has been disabled.\");\n        }\n      }\n      // Either workers are disabled, not supported or have thrown an exception.\n      // Thus, we fallback to a faked worker.\n      this._setupFakeWorker();\n    }\n\n    _setupFakeWorker() {\n      if (!isWorkerDisabled) {\n        warn(\"Setting up fake worker.\");\n        isWorkerDisabled = true;\n      }\n\n      setupFakeWorkerGlobal()\n        .then(WorkerMessageHandler => {\n          if (this.destroyed) {\n            this._readyCapability.reject(new Error(\"Worker was destroyed\"));\n            return;\n          }\n          const port = new LoopbackPort();\n          this._port = port;\n\n          // All fake workers use the same port, making id unique.\n          const id = \"fake\" + nextFakeWorkerId++;\n\n          // If the main thread is our worker, setup the handling for the\n          // messages -- the main thread sends to it self.\n          const workerHandler = new MessageHandler(id + \"_worker\", id, port);\n          WorkerMessageHandler.setup(workerHandler, port);\n\n          const messageHandler = new MessageHandler(id, id + \"_worker\", port);\n          this._messageHandler = messageHandler;\n          this._readyCapability.resolve();\n          // Send global setting, e.g. verbosity level.\n          messageHandler.send(\"configure\", {\n            verbosity: this.verbosity,\n          });\n        })\n        .catch(reason => {\n          this._readyCapability.reject(\n            new Error(`Setting up fake worker failed: \"${reason.message}\".`)\n          );\n        });\n    }\n\n    /**\n     * Destroys the worker instance.\n     */\n    destroy() {\n      this.destroyed = true;\n      if (this._webWorker) {\n        // We need to terminate only web worker created resource.\n        this._webWorker.terminate();\n        this._webWorker = null;\n      }\n      pdfWorkerPorts.delete(this._port);\n      this._port = null;\n      if (this._messageHandler) {\n        this._messageHandler.destroy();\n        this._messageHandler = null;\n      }\n    }\n\n    /**\n     * @param {PDFWorkerParameters} params - The worker initialization\n     *                                       parameters.\n     */\n    static fromPort(params) {\n      if (!params || !params.port) {\n        throw new Error(\"PDFWorker.fromPort - invalid method signature.\");\n      }\n      if (pdfWorkerPorts.has(params.port)) {\n        return pdfWorkerPorts.get(params.port);\n      }\n      return new PDFWorker(params);\n    }\n\n    static getWorkerSrc() {\n      return getWorkerSrc();\n    }\n  }\n  return PDFWorker;\n})();\n\n/**\n * For internal use only.\n * @ignore\n */\nclass WorkerTransport {\n  constructor(messageHandler, loadingTask, networkStream, params) {\n    this.messageHandler = messageHandler;\n    this.loadingTask = loadingTask;\n    this.commonObjs = new PDFObjects();\n    this.fontLoader = new FontLoader({\n      docId: loadingTask.docId,\n      onUnsupportedFeature: this._onUnsupportedFeature.bind(this),\n    });\n    this._params = params;\n    this.CMapReaderFactory = new params.CMapReaderFactory({\n      baseUrl: params.cMapUrl,\n      isCompressed: params.cMapPacked,\n    });\n\n    this.destroyed = false;\n    this.destroyCapability = null;\n    this._passwordCapability = null;\n\n    this._networkStream = networkStream;\n    this._fullReader = null;\n    this._lastProgress = null;\n\n    this.pageCache = [];\n    this.pagePromises = [];\n    this.downloadInfoCapability = createPromiseCapability();\n\n    this.setupMessageHandler();\n  }\n\n  destroy() {\n    if (this.destroyCapability) {\n      return this.destroyCapability.promise;\n    }\n\n    this.destroyed = true;\n    this.destroyCapability = createPromiseCapability();\n\n    if (this._passwordCapability) {\n      this._passwordCapability.reject(\n        new Error(\"Worker was destroyed during onPassword callback\")\n      );\n    }\n\n    const waitOn = [];\n    // We need to wait for all renderings to be completed, e.g.\n    // timeout/rAF can take a long time.\n    this.pageCache.forEach(function(page) {\n      if (page) {\n        waitOn.push(page._destroy());\n      }\n    });\n    this.pageCache.length = 0;\n    this.pagePromises.length = 0;\n    // We also need to wait for the worker to finish its long running tasks.\n    const terminated = this.messageHandler.sendWithPromise(\"Terminate\", null);\n    waitOn.push(terminated);\n    Promise.all(waitOn).then(() => {\n      this.fontLoader.clear();\n      if (this._networkStream) {\n        this._networkStream.cancelAllRequests(\n          new AbortException(\"Worker was terminated.\")\n        );\n      }\n\n      if (this.messageHandler) {\n        this.messageHandler.destroy();\n        this.messageHandler = null;\n      }\n      this.destroyCapability.resolve();\n    }, this.destroyCapability.reject);\n    return this.destroyCapability.promise;\n  }\n\n  setupMessageHandler() {\n    const { messageHandler, loadingTask } = this;\n\n    messageHandler.on(\"GetReader\", (data, sink) => {\n      assert(this._networkStream);\n      this._fullReader = this._networkStream.getFullReader();\n      this._fullReader.onProgress = evt => {\n        this._lastProgress = {\n          loaded: evt.loaded,\n          total: evt.total,\n        };\n      };\n      sink.onPull = () => {\n        this._fullReader\n          .read()\n          .then(function({ value, done }) {\n            if (done) {\n              sink.close();\n              return;\n            }\n            assert(isArrayBuffer(value));\n            // Enqueue data chunk into sink, and transfer it\n            // to other side as `Transferable` object.\n            sink.enqueue(new Uint8Array(value), 1, [value]);\n          })\n          .catch(reason => {\n            sink.error(reason);\n          });\n      };\n\n      sink.onCancel = reason => {\n        this._fullReader.cancel(reason);\n      };\n    });\n\n    messageHandler.on(\"ReaderHeadersReady\", data => {\n      const headersCapability = createPromiseCapability();\n      const fullReader = this._fullReader;\n      fullReader.headersReady.then(() => {\n        // If stream or range are disabled, it's our only way to report\n        // loading progress.\n        if (!fullReader.isStreamingSupported || !fullReader.isRangeSupported) {\n          if (this._lastProgress && loadingTask.onProgress) {\n            loadingTask.onProgress(this._lastProgress);\n          }\n          fullReader.onProgress = evt => {\n            if (loadingTask.onProgress) {\n              loadingTask.onProgress({\n                loaded: evt.loaded,\n                total: evt.total,\n              });\n            }\n          };\n        }\n\n        headersCapability.resolve({\n          isStreamingSupported: fullReader.isStreamingSupported,\n          isRangeSupported: fullReader.isRangeSupported,\n          contentLength: fullReader.contentLength,\n        });\n      }, headersCapability.reject);\n\n      return headersCapability.promise;\n    });\n\n    messageHandler.on(\"GetRangeReader\", (data, sink) => {\n      assert(this._networkStream);\n      const rangeReader = this._networkStream.getRangeReader(\n        data.begin,\n        data.end\n      );\n\n      // When streaming is enabled, it's possible that the data requested here\n      // has already been fetched via the `_fullRequestReader` implementation.\n      // However, given that the PDF data is loaded asynchronously on the\n      // main-thread and then sent via `postMessage` to the worker-thread,\n      // it may not have been available during parsing (hence the attempt to\n      // use range requests here).\n      //\n      // To avoid wasting time and resources here, we'll thus *not* dispatch\n      // range requests if the data was already loaded but has not been sent to\n      // the worker-thread yet (which will happen via the `_fullRequestReader`).\n      if (!rangeReader) {\n        sink.close();\n        return;\n      }\n\n      sink.onPull = () => {\n        rangeReader\n          .read()\n          .then(function({ value, done }) {\n            if (done) {\n              sink.close();\n              return;\n            }\n            assert(isArrayBuffer(value));\n            sink.enqueue(new Uint8Array(value), 1, [value]);\n          })\n          .catch(reason => {\n            sink.error(reason);\n          });\n      };\n\n      sink.onCancel = reason => {\n        rangeReader.cancel(reason);\n      };\n    });\n\n    messageHandler.on(\"GetDoc\", ({ pdfInfo }) => {\n      this._numPages = pdfInfo.numPages;\n      loadingTask._capability.resolve(new PDFDocumentProxy(pdfInfo, this));\n    });\n\n    messageHandler.on(\"DocException\", function(ex) {\n      let reason;\n      switch (ex.name) {\n        case \"PasswordException\":\n          reason = new PasswordException(ex.message, ex.code);\n          break;\n        case \"InvalidPDFException\":\n          reason = new InvalidPDFException(ex.message);\n          break;\n        case \"MissingPDFException\":\n          reason = new MissingPDFException(ex.message);\n          break;\n        case \"UnexpectedResponseException\":\n          reason = new UnexpectedResponseException(ex.message, ex.status);\n          break;\n        case \"UnknownErrorException\":\n          reason = new UnknownErrorException(ex.message, ex.details);\n          break;\n      }\n      if (\n        typeof PDFJSDev === \"undefined\" ||\n        PDFJSDev.test(\"!PRODUCTION || TESTING\")\n      ) {\n        assert(reason instanceof Error, \"DocException: expected an Error.\");\n      }\n      loadingTask._capability.reject(reason);\n    });\n\n    messageHandler.on(\"PasswordRequest\", exception => {\n      this._passwordCapability = createPromiseCapability();\n\n      if (loadingTask.onPassword) {\n        const updatePassword = password => {\n          this._passwordCapability.resolve({\n            password,\n          });\n        };\n        try {\n          loadingTask.onPassword(updatePassword, exception.code);\n        } catch (ex) {\n          this._passwordCapability.reject(ex);\n        }\n      } else {\n        this._passwordCapability.reject(\n          new PasswordException(exception.message, exception.code)\n        );\n      }\n      return this._passwordCapability.promise;\n    });\n\n    messageHandler.on(\"DataLoaded\", data => {\n      // For consistency: Ensure that progress is always reported when the\n      // entire PDF file has been loaded, regardless of how it was fetched.\n      if (loadingTask.onProgress) {\n        loadingTask.onProgress({\n          loaded: data.length,\n          total: data.length,\n        });\n      }\n      this.downloadInfoCapability.resolve(data);\n    });\n\n    messageHandler.on(\"StartRenderPage\", data => {\n      if (this.destroyed) {\n        return; // Ignore any pending requests if the worker was terminated.\n      }\n\n      const page = this.pageCache[data.pageIndex];\n      page._startRenderPage(data.transparency, data.intent);\n    });\n\n    messageHandler.on(\"commonobj\", data => {\n      if (this.destroyed) {\n        return; // Ignore any pending requests if the worker was terminated.\n      }\n\n      const [id, type, exportedData] = data;\n      if (this.commonObjs.has(id)) {\n        return;\n      }\n\n      switch (type) {\n        case \"Font\":\n          const params = this._params;\n\n          if (\"error\" in exportedData) {\n            const exportedError = exportedData.error;\n            warn(`Error during font loading: ${exportedError}`);\n            this.commonObjs.resolve(id, exportedError);\n            break;\n          }\n\n          let fontRegistry = null;\n          if (\n            params.pdfBug &&\n            globalThis.FontInspector &&\n            globalThis.FontInspector.enabled\n          ) {\n            fontRegistry = {\n              registerFont(font, url) {\n                globalThis.FontInspector.fontAdded(font, url);\n              },\n            };\n          }\n          const font = new FontFaceObject(exportedData, {\n            isEvalSupported: params.isEvalSupported,\n            disableFontFace: params.disableFontFace,\n            ignoreErrors: params.ignoreErrors,\n            onUnsupportedFeature: this._onUnsupportedFeature.bind(this),\n            fontRegistry,\n          });\n\n          this.fontLoader.bind(font).then(\n            () => {\n              this.commonObjs.resolve(id, font);\n            },\n            reason => {\n              messageHandler\n                .sendWithPromise(\"FontFallback\", {\n                  id,\n                })\n                .finally(() => {\n                  this.commonObjs.resolve(id, font);\n                });\n            }\n          );\n          break;\n        case \"FontPath\":\n        case \"FontType3Res\":\n          this.commonObjs.resolve(id, exportedData);\n          break;\n        default:\n          throw new Error(`Got unknown common object type ${type}`);\n      }\n    });\n\n    messageHandler.on(\"obj\", data => {\n      if (this.destroyed) {\n        // Ignore any pending requests if the worker was terminated.\n        return undefined;\n      }\n\n      const [id, pageIndex, type, imageData] = data;\n      const pageProxy = this.pageCache[pageIndex];\n      if (pageProxy.objs.has(id)) {\n        return undefined;\n      }\n\n      switch (type) {\n        case \"JpegStream\":\n          return new Promise((resolve, reject) => {\n            const img = new Image();\n            img.onload = function() {\n              resolve(img);\n            };\n            img.onerror = function() {\n              // Note that when the browser image loading/decoding fails,\n              // we'll fallback to the built-in PDF.js JPEG decoder; see\n              // `PartialEvaluator.buildPaintImageXObject` in the\n              // `src/core/evaluator.js` file.\n              reject(new Error(\"Error during JPEG image loading\"));\n\n              // Always remember to release the image data if errors occurred.\n              releaseImageResources(img);\n            };\n            img.src = imageData;\n          }).then(img => {\n            pageProxy.objs.resolve(id, img);\n          });\n        case \"Image\":\n          pageProxy.objs.resolve(id, imageData);\n\n          // Heuristic that will allow us not to store large data.\n          const MAX_IMAGE_SIZE_TO_STORE = 8000000;\n          if (\n            imageData &&\n            \"data\" in imageData &&\n            imageData.data.length > MAX_IMAGE_SIZE_TO_STORE\n          ) {\n            pageProxy.cleanupAfterRender = true;\n          }\n          break;\n        default:\n          throw new Error(`Got unknown object type ${type}`);\n      }\n      return undefined;\n    });\n\n    messageHandler.on(\"DocProgress\", data => {\n      if (this.destroyed) {\n        return; // Ignore any pending requests if the worker was terminated.\n      }\n\n      if (loadingTask.onProgress) {\n        loadingTask.onProgress({\n          loaded: data.loaded,\n          total: data.total,\n        });\n      }\n    });\n\n    messageHandler.on(\n      \"UnsupportedFeature\",\n      this._onUnsupportedFeature.bind(this)\n    );\n\n    messageHandler.on(\"JpegDecode\", data => {\n      if (this.destroyed) {\n        return Promise.reject(new Error(\"Worker was destroyed\"));\n      }\n\n      if (typeof document === \"undefined\") {\n        // Make sure that this code is not executing in node.js, as\n        // it's using DOM image, and there is no library to support that.\n        return Promise.reject(new Error('\"document\" is not defined.'));\n      }\n\n      const [imageUrl, components] = data;\n      if (components !== 3 && components !== 1) {\n        return Promise.reject(\n          new Error(\"Only 3 components or 1 component can be returned\")\n        );\n      }\n\n      return new Promise(function(resolve, reject) {\n        const img = new Image();\n        img.onload = function() {\n          const { width, height } = img;\n          const size = width * height;\n          const rgbaLength = size * 4;\n          const buf = new Uint8ClampedArray(size * components);\n          let tmpCanvas = document.createElement(\"canvas\");\n          tmpCanvas.width = width;\n          tmpCanvas.height = height;\n          let tmpCtx = tmpCanvas.getContext(\"2d\");\n          tmpCtx.drawImage(img, 0, 0);\n          const data = tmpCtx.getImageData(0, 0, width, height).data;\n\n          if (components === 3) {\n            for (let i = 0, j = 0; i < rgbaLength; i += 4, j += 3) {\n              buf[j] = data[i];\n              buf[j + 1] = data[i + 1];\n              buf[j + 2] = data[i + 2];\n            }\n          } else if (components === 1) {\n            for (let i = 0, j = 0; i < rgbaLength; i += 4, j++) {\n              buf[j] = data[i];\n            }\n          }\n          resolve({ data: buf, width, height });\n\n          // Immediately release the image data once decoding has finished.\n          releaseImageResources(img);\n          // Zeroing the width and height cause Firefox to release graphics\n          // resources immediately, which can greatly reduce memory consumption.\n          tmpCanvas.width = 0;\n          tmpCanvas.height = 0;\n          tmpCanvas = null;\n          tmpCtx = null;\n        };\n        img.onerror = function() {\n          reject(new Error(\"JpegDecode failed to load image\"));\n\n          // Always remember to release the image data if errors occurred.\n          releaseImageResources(img);\n        };\n        img.src = imageUrl;\n      });\n    });\n\n    messageHandler.on(\"FetchBuiltInCMap\", (data, sink) => {\n      if (this.destroyed) {\n        sink.error(new Error(\"Worker was destroyed\"));\n        return;\n      }\n      let fetched = false;\n\n      sink.onPull = () => {\n        if (fetched) {\n          sink.close();\n          return;\n        }\n        fetched = true;\n\n        this.CMapReaderFactory.fetch(data)\n          .then(function(builtInCMap) {\n            sink.enqueue(builtInCMap, 1, [builtInCMap.cMapData.buffer]);\n          })\n          .catch(function(reason) {\n            sink.error(reason);\n          });\n      };\n    });\n  }\n\n  _onUnsupportedFeature({ featureId }) {\n    if (this.destroyed) {\n      return; // Ignore any pending requests if the worker was terminated.\n    }\n    if (this.loadingTask.onUnsupportedFeature) {\n      this.loadingTask.onUnsupportedFeature(featureId);\n    }\n  }\n\n  getData() {\n    return this.messageHandler.sendWithPromise(\"GetData\", null);\n  }\n\n  getPage(pageNumber) {\n    if (\n      !Number.isInteger(pageNumber) ||\n      pageNumber <= 0 ||\n      pageNumber > this._numPages\n    ) {\n      return Promise.reject(new Error(\"Invalid page request\"));\n    }\n\n    const pageIndex = pageNumber - 1;\n    if (pageIndex in this.pagePromises) {\n      return this.pagePromises[pageIndex];\n    }\n    const promise = this.messageHandler\n      .sendWithPromise(\"GetPage\", {\n        pageIndex,\n      })\n      .then(pageInfo => {\n        if (this.destroyed) {\n          throw new Error(\"Transport destroyed\");\n        }\n        const page = new PDFPageProxy(\n          pageIndex,\n          pageInfo,\n          this,\n          this._params.pdfBug\n        );\n        this.pageCache[pageIndex] = page;\n        return page;\n      });\n    this.pagePromises[pageIndex] = promise;\n    return promise;\n  }\n\n  getPageIndex(ref) {\n    return this.messageHandler\n      .sendWithPromise(\"GetPageIndex\", {\n        ref,\n      })\n      .catch(function(reason) {\n        return Promise.reject(new Error(reason));\n      });\n  }\n\n  getAnnotations(pageIndex, intent) {\n    return this.messageHandler.sendWithPromise(\"GetAnnotations\", {\n      pageIndex,\n      intent,\n    });\n  }\n\n  getDestinations() {\n    return this.messageHandler.sendWithPromise(\"GetDestinations\", null);\n  }\n\n  getDestination(id) {\n    if (typeof id !== \"string\") {\n      return Promise.reject(new Error(\"Invalid destination request.\"));\n    }\n    return this.messageHandler.sendWithPromise(\"GetDestination\", {\n      id,\n    });\n  }\n\n  getPageLabels() {\n    return this.messageHandler.sendWithPromise(\"GetPageLabels\", null);\n  }\n\n  getPageLayout() {\n    return this.messageHandler.sendWithPromise(\"GetPageLayout\", null);\n  }\n\n  getPageMode() {\n    return this.messageHandler.sendWithPromise(\"GetPageMode\", null);\n  }\n\n  getViewerPreferences() {\n    return this.messageHandler.sendWithPromise(\"GetViewerPreferences\", null);\n  }\n\n  getOpenAction() {\n    return this.messageHandler.sendWithPromise(\"GetOpenAction\", null);\n  }\n\n  getAttachments() {\n    return this.messageHandler.sendWithPromise(\"GetAttachments\", null);\n  }\n\n  getJavaScript() {\n    return this.messageHandler.sendWithPromise(\"GetJavaScript\", null);\n  }\n\n  getOutline() {\n    return this.messageHandler.sendWithPromise(\"GetOutline\", null);\n  }\n\n  getPermissions() {\n    return this.messageHandler.sendWithPromise(\"GetPermissions\", null);\n  }\n\n  getMetadata() {\n    return this.messageHandler\n      .sendWithPromise(\"GetMetadata\", null)\n      .then(results => {\n        return {\n          info: results[0],\n          metadata: results[1] ? new Metadata(results[1]) : null,\n          contentDispositionFilename: this._fullReader\n            ? this._fullReader.filename\n            : null,\n        };\n      });\n  }\n\n  getStats() {\n    return this.messageHandler.sendWithPromise(\"GetStats\", null);\n  }\n\n  startCleanup() {\n    return this.messageHandler.sendWithPromise(\"Cleanup\", null).then(() => {\n      for (let i = 0, ii = this.pageCache.length; i < ii; i++) {\n        const page = this.pageCache[i];\n        if (page) {\n          const cleanupSuccessful = page.cleanup();\n\n          if (!cleanupSuccessful) {\n            throw new Error(\n              `startCleanup: Page ${i + 1} is currently rendering.`\n            );\n          }\n        }\n      }\n      this.commonObjs.clear();\n      this.fontLoader.clear();\n    });\n  }\n\n  get loadingParams() {\n    const params = this._params;\n    return shadow(this, \"loadingParams\", {\n      disableAutoFetch: params.disableAutoFetch,\n      disableCreateObjectURL: params.disableCreateObjectURL,\n      disableFontFace: params.disableFontFace,\n      nativeImageDecoderSupport: params.nativeImageDecoderSupport,\n    });\n  }\n}\n\n/**\n * A PDF document and page is built of many objects. E.g. there are objects for\n * fonts, images, rendering code, etc. These objects may get processed inside of\n * a worker. This class implements some basic methods to manage these objects.\n * @ignore\n */\nclass PDFObjects {\n  constructor() {\n    this._objs = Object.create(null);\n  }\n\n  /**\n   * Ensures there is an object defined for `objId`.\n   * @private\n   */\n  _ensureObj(objId) {\n    if (this._objs[objId]) {\n      return this._objs[objId];\n    }\n    return (this._objs[objId] = {\n      capability: createPromiseCapability(),\n      data: null,\n      resolved: false,\n    });\n  }\n\n  /**\n   * If called *without* callback, this returns the data of `objId` but the\n   * object needs to be resolved. If it isn't, this method throws.\n   *\n   * If called *with* a callback, the callback is called with the data of the\n   * object once the object is resolved. That means, if you call this method\n   * and the object is already resolved, the callback gets called right away.\n   */\n  get(objId, callback = null) {\n    // If there is a callback, then the get can be async and the object is\n    // not required to be resolved right now.\n    if (callback) {\n      this._ensureObj(objId).capability.promise.then(callback);\n      return null;\n    }\n    // If there isn't a callback, the user expects to get the resolved data\n    // directly.\n    const obj = this._objs[objId];\n    // If there isn't an object yet or the object isn't resolved, then the\n    // data isn't ready yet!\n    if (!obj || !obj.resolved) {\n      throw new Error(`Requesting object that isn't resolved yet ${objId}.`);\n    }\n    return obj.data;\n  }\n\n  has(objId) {\n    const obj = this._objs[objId];\n    return obj ? obj.resolved : false;\n  }\n\n  /**\n   * Resolves the object `objId` with optional `data`.\n   */\n  resolve(objId, data) {\n    const obj = this._ensureObj(objId);\n\n    obj.resolved = true;\n    obj.data = data;\n    obj.capability.resolve(data);\n  }\n\n  clear() {\n    for (const objId in this._objs) {\n      const { data } = this._objs[objId];\n\n      if (typeof Image !== \"undefined\" && data instanceof Image) {\n        // Always release the image data when clearing out the cached objects.\n        releaseImageResources(data);\n      }\n    }\n    this._objs = Object.create(null);\n  }\n}\n\n/**\n * Allows controlling of the rendering tasks.\n * @alias RenderTask\n */\nclass RenderTask {\n  constructor(internalRenderTask) {\n    this._internalRenderTask = internalRenderTask;\n\n    /**\n     * Callback for incremental rendering -- a function that will be called\n     * each time the rendering is paused.  To continue rendering call the\n     * function that is the first argument to the callback.\n     * @type {function}\n     */\n    this.onContinue = null;\n  }\n\n  /**\n   * Promise for rendering task completion.\n   * @type {Promise}\n   */\n  get promise() {\n    return this._internalRenderTask.capability.promise;\n  }\n\n  /**\n   * Cancels the rendering task. If the task is currently rendering it will\n   * not be cancelled until graphics pauses with a timeout. The promise that\n   * this object extends will be rejected when cancelled.\n   */\n  cancel() {\n    this._internalRenderTask.cancel();\n  }\n\n  /**\n   * Registers callbacks to indicate the rendering task completion.\n   * @ignore\n   */\n  then(onFulfilled, onRejected) {\n    throw new Error(\n      \"Removed API method: \" +\n        \"RenderTask.then, use the `promise` getter instead.\"\n    );\n  }\n}\n\n/**\n * For internal use only.\n * @ignore\n */\nconst InternalRenderTask = (function InternalRenderTaskClosure() {\n  const canvasInRendering = new WeakSet();\n\n  class InternalRenderTask {\n    constructor({\n      callback,\n      params,\n      objs,\n      commonObjs,\n      operatorList,\n      pageIndex,\n      canvasFactory,\n      webGLContext,\n      useRequestAnimationFrame = false,\n      pdfBug = false,\n    }) {\n      this.callback = callback;\n      this.params = params;\n      this.objs = objs;\n      this.commonObjs = commonObjs;\n      this.operatorListIdx = null;\n      this.operatorList = operatorList;\n      this._pageIndex = pageIndex;\n      this.canvasFactory = canvasFactory;\n      this.webGLContext = webGLContext;\n      this._pdfBug = pdfBug;\n\n      this.running = false;\n      this.graphicsReadyCallback = null;\n      this.graphicsReady = false;\n      this._useRequestAnimationFrame =\n        useRequestAnimationFrame === true && typeof window !== \"undefined\";\n      this.cancelled = false;\n      this.capability = createPromiseCapability();\n      this.task = new RenderTask(this);\n      // caching this-bound methods\n      this._continueBound = this._continue.bind(this);\n      this._scheduleNextBound = this._scheduleNext.bind(this);\n      this._nextBound = this._next.bind(this);\n      this._canvas = params.canvasContext.canvas;\n    }\n\n    initializeGraphics(transparency = false) {\n      if (this.cancelled) {\n        return;\n      }\n      if (this._canvas) {\n        if (canvasInRendering.has(this._canvas)) {\n          throw new Error(\n            \"Cannot use the same canvas during multiple render() operations. \" +\n              \"Use different canvas or ensure previous operations were \" +\n              \"cancelled or completed.\"\n          );\n        }\n        canvasInRendering.add(this._canvas);\n      }\n\n      if (\n        this._pdfBug &&\n        globalThis.StepperManager &&\n        globalThis.StepperManager.enabled\n      ) {\n        this.stepper = globalThis.StepperManager.create(this._pageIndex);\n        this.stepper.init(this.operatorList);\n        this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint();\n      }\n      const {\n        canvasContext,\n        viewport,\n        transform,\n        imageLayer,\n        background,\n      } = this.params;\n\n      this.gfx = new CanvasGraphics(\n        canvasContext,\n        this.commonObjs,\n        this.objs,\n        this.canvasFactory,\n        this.webGLContext,\n        imageLayer\n      );\n      this.gfx.beginDrawing({\n        transform,\n        viewport,\n        transparency,\n        background,\n      });\n      this.operatorListIdx = 0;\n      this.graphicsReady = true;\n      if (this.graphicsReadyCallback) {\n        this.graphicsReadyCallback();\n      }\n    }\n\n    cancel(error = null) {\n      this.running = false;\n      this.cancelled = true;\n      if (this.gfx) {\n        this.gfx.endDrawing();\n      }\n      if (this._canvas) {\n        canvasInRendering.delete(this._canvas);\n      }\n      this.callback(\n        error ||\n          new RenderingCancelledException(\n            `Rendering cancelled, page ${this._pageIndex + 1}`,\n            \"canvas\"\n          )\n      );\n    }\n\n    operatorListChanged() {\n      if (!this.graphicsReady) {\n        if (!this.graphicsReadyCallback) {\n          this.graphicsReadyCallback = this._continueBound;\n        }\n        return;\n      }\n\n      if (this.stepper) {\n        this.stepper.updateOperatorList(this.operatorList);\n      }\n\n      if (this.running) {\n        return;\n      }\n      this._continue();\n    }\n\n    _continue() {\n      this.running = true;\n      if (this.cancelled) {\n        return;\n      }\n      if (this.task.onContinue) {\n        this.task.onContinue(this._scheduleNextBound);\n      } else {\n        this._scheduleNext();\n      }\n    }\n\n    _scheduleNext() {\n      if (this._useRequestAnimationFrame) {\n        window.requestAnimationFrame(() => {\n          this._nextBound().catch(this.cancel.bind(this));\n        });\n      } else {\n        Promise.resolve()\n          .then(this._nextBound)\n          .catch(this.cancel.bind(this));\n      }\n    }\n\n    async _next() {\n      if (this.cancelled) {\n        return;\n      }\n      this.operatorListIdx = this.gfx.executeOperatorList(\n        this.operatorList,\n        this.operatorListIdx,\n        this._continueBound,\n        this.stepper\n      );\n      if (this.operatorListIdx === this.operatorList.argsArray.length) {\n        this.running = false;\n        if (this.operatorList.lastChunk) {\n          this.gfx.endDrawing();\n          if (this._canvas) {\n            canvasInRendering.delete(this._canvas);\n          }\n          this.callback();\n        }\n      }\n    }\n  }\n  return InternalRenderTask;\n})();\n\nconst version =\n  typeof PDFJSDev !== \"undefined\" ? PDFJSDev.eval(\"BUNDLE_VERSION\") : null;\nconst build =\n  typeof PDFJSDev !== \"undefined\" ? PDFJSDev.eval(\"BUNDLE_BUILD\") : null;\n\nexport {\n  getDocument,\n  LoopbackPort,\n  PDFDataRangeTransport,\n  PDFWorker,\n  PDFDocumentProxy,\n  PDFPageProxy,\n  setPDFNetworkStreamFactory,\n  version,\n  build,\n};\n","/* Copyright 2015 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\nimport {\n  assert,\n  BaseException,\n  CMapCompressionType,\n  isString,\n  removeNullCharacters,\n  stringToBytes,\n  Util,\n  warn,\n} from \"../shared/util.js\";\n\nconst DEFAULT_LINK_REL = \"noopener noreferrer nofollow\";\nconst SVG_NS = \"http://www.w3.org/2000/svg\";\n\nclass DOMCanvasFactory {\n  create(width, height) {\n    if (width <= 0 || height <= 0) {\n      throw new Error(\"Invalid canvas size\");\n    }\n    const canvas = document.createElement(\"canvas\");\n    const context = canvas.getContext(\"2d\");\n    canvas.width = width;\n    canvas.height = height;\n    return {\n      canvas,\n      context,\n    };\n  }\n\n  reset(canvasAndContext, width, height) {\n    if (!canvasAndContext.canvas) {\n      throw new Error(\"Canvas is not specified\");\n    }\n    if (width <= 0 || height <= 0) {\n      throw new Error(\"Invalid canvas size\");\n    }\n    canvasAndContext.canvas.width = width;\n    canvasAndContext.canvas.height = height;\n  }\n\n  destroy(canvasAndContext) {\n    if (!canvasAndContext.canvas) {\n      throw new Error(\"Canvas is not specified\");\n    }\n    // Zeroing the width and height cause Firefox to release graphics\n    // resources immediately, which can greatly reduce memory consumption.\n    canvasAndContext.canvas.width = 0;\n    canvasAndContext.canvas.height = 0;\n    canvasAndContext.canvas = null;\n    canvasAndContext.context = null;\n  }\n}\n\nclass DOMCMapReaderFactory {\n  constructor({ baseUrl = null, isCompressed = false }) {\n    this.baseUrl = baseUrl;\n    this.isCompressed = isCompressed;\n  }\n\n  async fetch({ name }) {\n    if (!this.baseUrl) {\n      throw new Error(\n        'The CMap \"baseUrl\" parameter must be specified, ensure that ' +\n          'the \"cMapUrl\" and \"cMapPacked\" API parameters are provided.'\n      );\n    }\n    if (!name) {\n      throw new Error(\"CMap name must be specified.\");\n    }\n    const url = this.baseUrl + name + (this.isCompressed ? \".bcmap\" : \"\");\n    const compressionType = this.isCompressed\n      ? CMapCompressionType.BINARY\n      : CMapCompressionType.NONE;\n\n    if (\n      (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"MOZCENTRAL\")) ||\n      (isFetchSupported() && isValidFetchUrl(url, document.baseURI))\n    ) {\n      return fetch(url)\n        .then(async response => {\n          if (!response.ok) {\n            throw new Error(response.statusText);\n          }\n          let cMapData;\n          if (this.isCompressed) {\n            cMapData = new Uint8Array(await response.arrayBuffer());\n          } else {\n            cMapData = stringToBytes(await response.text());\n          }\n          return { cMapData, compressionType };\n        })\n        .catch(reason => {\n          throw new Error(\n            `Unable to load ${this.isCompressed ? \"binary \" : \"\"}` +\n              `CMap at: ${url}`\n          );\n        });\n    }\n\n    // The Fetch API is not supported.\n    return new Promise((resolve, reject) => {\n      const request = new XMLHttpRequest();\n      request.open(\"GET\", url, true);\n\n      if (this.isCompressed) {\n        request.responseType = \"arraybuffer\";\n      }\n      request.onreadystatechange = () => {\n        if (request.readyState !== XMLHttpRequest.DONE) {\n          return;\n        }\n        if (request.status === 200 || request.status === 0) {\n          let cMapData;\n          if (this.isCompressed && request.response) {\n            cMapData = new Uint8Array(request.response);\n          } else if (!this.isCompressed && request.responseText) {\n            cMapData = stringToBytes(request.responseText);\n          }\n          if (cMapData) {\n            resolve({ cMapData, compressionType });\n            return;\n          }\n        }\n        reject(new Error(request.statusText));\n      };\n\n      request.send(null);\n    }).catch(reason => {\n      throw new Error(\n        `Unable to load ${this.isCompressed ? \"binary \" : \"\"}` +\n          `CMap at: ${url}`\n      );\n    });\n  }\n}\n\nclass DOMSVGFactory {\n  create(width, height) {\n    assert(width > 0 && height > 0, \"Invalid SVG dimensions\");\n\n    const svg = document.createElementNS(SVG_NS, \"svg:svg\");\n    svg.setAttribute(\"version\", \"1.1\");\n    svg.setAttribute(\"width\", width + \"px\");\n    svg.setAttribute(\"height\", height + \"px\");\n    svg.setAttribute(\"preserveAspectRatio\", \"none\");\n    svg.setAttribute(\"viewBox\", \"0 0 \" + width + \" \" + height);\n\n    return svg;\n  }\n\n  createElement(type) {\n    assert(typeof type === \"string\", \"Invalid SVG element type\");\n\n    return document.createElementNS(SVG_NS, type);\n  }\n}\n\n/**\n * @typedef {Object} PageViewportParameters\n * @property {Array} viewBox - The xMin, yMin, xMax and yMax coordinates.\n * @property {number} scale - The scale of the viewport.\n * @property {number} rotation - The rotation, in degrees, of the viewport.\n * @property {number} [offsetX] - The horizontal, i.e. x-axis, offset. The\n *   default value is `0`.\n * @property {number} [offsetY] - The vertical, i.e. y-axis, offset. The\n *   default value is `0`.\n * @property {boolean} [dontFlip] - If true, the y-axis will not be flipped.\n *   The default value is `false`.\n */\n\n/**\n * @typedef {Object} PageViewportCloneParameters\n * @property {number} [scale] - The scale, overriding the one in the cloned\n *   viewport. The default value is `this.scale`.\n * @property {number} [rotation] - The rotation, in degrees, overriding the one\n *   in the cloned viewport. The default value is `this.rotation`.\n * @property {number} [offsetX] - The horizontal, i.e. x-axis, offset.\n *   The default value is `this.offsetX`.\n * @property {number} [offsetY] - The vertical, i.e. y-axis, offset.\n *   The default value is `this.offsetY`.\n * @property {boolean} [dontFlip] - If true, the x-axis will not be flipped.\n *   The default value is `false`.\n */\n\n/**\n * PDF page viewport created based on scale, rotation and offset.\n */\nclass PageViewport {\n  /**\n   * @param {PageViewportParameters}\n   */\n  constructor({\n    viewBox,\n    scale,\n    rotation,\n    offsetX = 0,\n    offsetY = 0,\n    dontFlip = false,\n  }) {\n    this.viewBox = viewBox;\n    this.scale = scale;\n    this.rotation = rotation;\n    this.offsetX = offsetX;\n    this.offsetY = offsetY;\n\n    // creating transform to convert pdf coordinate system to the normal\n    // canvas like coordinates taking in account scale and rotation\n    const centerX = (viewBox[2] + viewBox[0]) / 2;\n    const centerY = (viewBox[3] + viewBox[1]) / 2;\n    let rotateA, rotateB, rotateC, rotateD;\n    rotation = rotation % 360;\n    rotation = rotation < 0 ? rotation + 360 : rotation;\n    switch (rotation) {\n      case 180:\n        rotateA = -1;\n        rotateB = 0;\n        rotateC = 0;\n        rotateD = 1;\n        break;\n      case 90:\n        rotateA = 0;\n        rotateB = 1;\n        rotateC = 1;\n        rotateD = 0;\n        break;\n      case 270:\n        rotateA = 0;\n        rotateB = -1;\n        rotateC = -1;\n        rotateD = 0;\n        break;\n      // case 0:\n      default:\n        rotateA = 1;\n        rotateB = 0;\n        rotateC = 0;\n        rotateD = -1;\n        break;\n    }\n\n    if (dontFlip) {\n      rotateC = -rotateC;\n      rotateD = -rotateD;\n    }\n\n    let offsetCanvasX, offsetCanvasY;\n    let width, height;\n    if (rotateA === 0) {\n      offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX;\n      offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY;\n      width = Math.abs(viewBox[3] - viewBox[1]) * scale;\n      height = Math.abs(viewBox[2] - viewBox[0]) * scale;\n    } else {\n      offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX;\n      offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY;\n      width = Math.abs(viewBox[2] - viewBox[0]) * scale;\n      height = Math.abs(viewBox[3] - viewBox[1]) * scale;\n    }\n    // creating transform for the following operations:\n    // translate(-centerX, -centerY), rotate and flip vertically,\n    // scale, and translate(offsetCanvasX, offsetCanvasY)\n    this.transform = [\n      rotateA * scale,\n      rotateB * scale,\n      rotateC * scale,\n      rotateD * scale,\n      offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY,\n      offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY,\n    ];\n\n    this.width = width;\n    this.height = height;\n  }\n\n  /**\n   * Clones viewport, with optional additional properties.\n   * @param {PageViewportCloneParameters} [params]\n   * @returns {PageViewport} Cloned viewport.\n   */\n  clone({\n    scale = this.scale,\n    rotation = this.rotation,\n    offsetX = this.offsetX,\n    offsetY = this.offsetY,\n    dontFlip = false,\n  } = {}) {\n    return new PageViewport({\n      viewBox: this.viewBox.slice(),\n      scale,\n      rotation,\n      offsetX,\n      offsetY,\n      dontFlip,\n    });\n  }\n\n  /**\n   * Converts PDF point to the viewport coordinates. For examples, useful for\n   * converting PDF location into canvas pixel coordinates.\n   * @param {number} x - The x-coordinate.\n   * @param {number} y - The y-coordinate.\n   * @returns {Object} Object containing `x` and `y` properties of the\n   *   point in the viewport coordinate space.\n   * @see {@link convertToPdfPoint}\n   * @see {@link convertToViewportRectangle}\n   */\n  convertToViewportPoint(x, y) {\n    return Util.applyTransform([x, y], this.transform);\n  }\n\n  /**\n   * Converts PDF rectangle to the viewport coordinates.\n   * @param {Array} rect - The xMin, yMin, xMax and yMax coordinates.\n   * @returns {Array} Array containing corresponding coordinates of the\n   *   rectangle in the viewport coordinate space.\n   * @see {@link convertToViewportPoint}\n   */\n  convertToViewportRectangle(rect) {\n    const topLeft = Util.applyTransform([rect[0], rect[1]], this.transform);\n    const bottomRight = Util.applyTransform([rect[2], rect[3]], this.transform);\n    return [topLeft[0], topLeft[1], bottomRight[0], bottomRight[1]];\n  }\n\n  /**\n   * Converts viewport coordinates to the PDF location. For examples, useful\n   * for converting canvas pixel location into PDF one.\n   * @param {number} x - The x-coordinate.\n   * @param {number} y - The y-coordinate.\n   * @returns {Object} Object containing `x` and `y` properties of the\n   *   point in the PDF coordinate space.\n   * @see {@link convertToViewportPoint}\n   */\n  convertToPdfPoint(x, y) {\n    return Util.applyInverseTransform([x, y], this.transform);\n  }\n}\n\nclass RenderingCancelledException extends BaseException {\n  constructor(msg, type) {\n    super(msg);\n    this.type = type;\n  }\n}\n\nconst LinkTarget = {\n  NONE: 0, // Default value.\n  SELF: 1,\n  BLANK: 2,\n  PARENT: 3,\n  TOP: 4,\n};\n\n/**\n * @typedef ExternalLinkParameters\n * @typedef {Object} ExternalLinkParameters\n * @property {string} url - An absolute URL.\n * @property {LinkTarget} [target] - The link target. The default value is\n *   `LinkTarget.NONE`.\n * @property {string} [rel] - The link relationship. The default value is\n *   `DEFAULT_LINK_REL`.\n * @property {boolean} [enabled] - Whether the link should be enabled. The\n *   default value is true.\n */\n\n/**\n * Adds various attributes (href, title, target, rel) to hyperlinks.\n * @param {HTMLLinkElement} link - The link element.\n * @param {ExternalLinkParameters} params\n */\nfunction addLinkAttributes(link, { url, target, rel, enabled = true } = {}) {\n  assert(\n    url && typeof url === \"string\",\n    'addLinkAttributes: A valid \"url\" parameter must provided.'\n  );\n\n  const urlNullRemoved = removeNullCharacters(url);\n  if (enabled) {\n    link.href = link.title = urlNullRemoved;\n  } else {\n    link.href = \"\";\n    link.title = `Disabled: ${urlNullRemoved}`;\n    link.onclick = () => {\n      return false;\n    };\n  }\n\n  let targetStr = \"\"; // LinkTarget.NONE\n  switch (target) {\n    case LinkTarget.NONE:\n      break;\n    case LinkTarget.SELF:\n      targetStr = \"_self\";\n      break;\n    case LinkTarget.BLANK:\n      targetStr = \"_blank\";\n      break;\n    case LinkTarget.PARENT:\n      targetStr = \"_parent\";\n      break;\n    case LinkTarget.TOP:\n      targetStr = \"_top\";\n      break;\n  }\n  link.target = targetStr;\n\n  link.rel = typeof rel === \"string\" ? rel : DEFAULT_LINK_REL;\n}\n\n// Gets the file name from a given URL.\nfunction getFilenameFromUrl(url) {\n  const anchor = url.indexOf(\"#\");\n  const query = url.indexOf(\"?\");\n  const end = Math.min(\n    anchor > 0 ? anchor : url.length,\n    query > 0 ? query : url.length\n  );\n  return url.substring(url.lastIndexOf(\"/\", end) + 1, end);\n}\n\nclass StatTimer {\n  constructor() {\n    this.started = Object.create(null);\n    this.times = [];\n  }\n\n  time(name) {\n    if (name in this.started) {\n      warn(`Timer is already running for ${name}`);\n    }\n    this.started[name] = Date.now();\n  }\n\n  timeEnd(name) {\n    if (!(name in this.started)) {\n      warn(`Timer has not been started for ${name}`);\n    }\n    this.times.push({\n      name,\n      start: this.started[name],\n      end: Date.now(),\n    });\n    // Remove timer from started so it can be called again.\n    delete this.started[name];\n  }\n\n  toString() {\n    // Find the longest name for padding purposes.\n    const outBuf = [];\n    let longest = 0;\n    for (const time of this.times) {\n      const name = time.name;\n      if (name.length > longest) {\n        longest = name.length;\n      }\n    }\n    for (const time of this.times) {\n      const duration = time.end - time.start;\n      outBuf.push(`${time.name.padEnd(longest)} ${duration}ms\\n`);\n    }\n    return outBuf.join(\"\");\n  }\n}\n\nfunction isFetchSupported() {\n  return (\n    typeof fetch !== \"undefined\" &&\n    typeof Response !== \"undefined\" &&\n    \"body\" in Response.prototype &&\n    typeof ReadableStream !== \"undefined\"\n  );\n}\n\nfunction isValidFetchUrl(url, baseUrl) {\n  try {\n    const { protocol } = baseUrl ? new URL(url, baseUrl) : new URL(url);\n    // The Fetch API only supports the http/https protocols, and not file/ftp.\n    return protocol === \"http:\" || protocol === \"https:\";\n  } catch (ex) {\n    return false; // `new URL()` will throw on incorrect data.\n  }\n}\n\nfunction loadScript(src) {\n  return new Promise((resolve, reject) => {\n    const script = document.createElement(\"script\");\n    script.src = src;\n\n    script.onload = resolve;\n    script.onerror = function() {\n      reject(new Error(`Cannot load script at: ${script.src}`));\n    };\n    (document.head || document.documentElement).appendChild(script);\n  });\n}\n\n// Deprecated API function -- display regardless of the `verbosity` setting.\nfunction deprecated(details) {\n  console.log(\"Deprecated API usage: \" + details);\n}\n\nfunction releaseImageResources(img) {\n  assert(img instanceof Image, \"Invalid `img` parameter.\");\n\n  const url = img.src;\n  if (\n    typeof url === \"string\" &&\n    url.startsWith(\"blob:\") &&\n    URL.revokeObjectURL\n  ) {\n    URL.revokeObjectURL(url);\n  }\n  img.removeAttribute(\"src\");\n}\n\nlet pdfDateStringRegex;\n\nclass PDFDateString {\n  /**\n   * Convert a PDF date string to a JavaScript `Date` object.\n   *\n   * The PDF date string format is described in section 7.9.4 of the official\n   * PDF 32000-1:2008 specification. However, in the PDF 1.7 reference (sixth\n   * edition) Adobe describes the same format including a trailing apostrophe.\n   * This syntax in incorrect, but Adobe Acrobat creates PDF files that contain\n   * them. We ignore all apostrophes as they are not necessary for date parsing.\n   *\n   * Moreover, Adobe Acrobat doesn't handle changing the date to universal time\n   * and doesn't use the user's time zone (effectively ignoring the HH' and mm'\n   * parts of the date string).\n   *\n   * @param {string} input\n   * @returns {Date|null}\n   */\n  static toDateObject(input) {\n    if (!input || !isString(input)) {\n      return null;\n    }\n\n    // Lazily initialize the regular expression.\n    if (!pdfDateStringRegex) {\n      pdfDateStringRegex = new RegExp(\n        \"^D:\" + // Prefix (required)\n        \"(\\\\d{4})\" + // Year (required)\n        \"(\\\\d{2})?\" + // Month (optional)\n        \"(\\\\d{2})?\" + // Day (optional)\n        \"(\\\\d{2})?\" + // Hour (optional)\n        \"(\\\\d{2})?\" + // Minute (optional)\n        \"(\\\\d{2})?\" + // Second (optional)\n        \"([Z|+|-])?\" + // Universal time relation (optional)\n        \"(\\\\d{2})?\" + // Offset hour (optional)\n        \"'?\" + // Splitting apostrophe (optional)\n        \"(\\\\d{2})?\" + // Offset minute (optional)\n          \"'?\" // Trailing apostrophe (optional)\n      );\n    }\n\n    // Optional fields that don't satisfy the requirements from the regular\n    // expression (such as incorrect digit counts or numbers that are out of\n    // range) will fall back the defaults from the specification.\n    const matches = pdfDateStringRegex.exec(input);\n    if (!matches) {\n      return null;\n    }\n\n    // JavaScript's `Date` object expects the month to be between 0 and 11\n    // instead of 1 and 12, so we have to correct for that.\n    const year = parseInt(matches[1], 10);\n    let month = parseInt(matches[2], 10);\n    month = month >= 1 && month <= 12 ? month - 1 : 0;\n    let day = parseInt(matches[3], 10);\n    day = day >= 1 && day <= 31 ? day : 1;\n    let hour = parseInt(matches[4], 10);\n    hour = hour >= 0 && hour <= 23 ? hour : 0;\n    let minute = parseInt(matches[5], 10);\n    minute = minute >= 0 && minute <= 59 ? minute : 0;\n    let second = parseInt(matches[6], 10);\n    second = second >= 0 && second <= 59 ? second : 0;\n    const universalTimeRelation = matches[7] || \"Z\";\n    let offsetHour = parseInt(matches[8], 10);\n    offsetHour = offsetHour >= 0 && offsetHour <= 23 ? offsetHour : 0;\n    let offsetMinute = parseInt(matches[9], 10) || 0;\n    offsetMinute = offsetMinute >= 0 && offsetMinute <= 59 ? offsetMinute : 0;\n\n    // Universal time relation 'Z' means that the local time is equal to the\n    // universal time, whereas the relations '+'/'-' indicate that the local\n    // time is later respectively earlier than the universal time. Every date\n    // is normalized to universal time.\n    if (universalTimeRelation === \"-\") {\n      hour += offsetHour;\n      minute += offsetMinute;\n    } else if (universalTimeRelation === \"+\") {\n      hour -= offsetHour;\n      minute -= offsetMinute;\n    }\n\n    return new Date(Date.UTC(year, month, day, hour, minute, second));\n  }\n}\n\nexport {\n  PageViewport,\n  RenderingCancelledException,\n  addLinkAttributes,\n  getFilenameFromUrl,\n  LinkTarget,\n  DEFAULT_LINK_REL,\n  DOMCanvasFactory,\n  DOMCMapReaderFactory,\n  DOMSVGFactory,\n  StatTimer,\n  isFetchSupported,\n  isValidFetchUrl,\n  loadScript,\n  deprecated,\n  releaseImageResources,\n  PDFDateString,\n};\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport {\n  assert,\n  bytesToString,\n  IsEvalSupportedCached,\n  shadow,\n  string32,\n  unreachable,\n  UNSUPPORTED_FEATURES,\n  warn,\n} from \"../shared/util.js\";\n\nclass BaseFontLoader {\n  constructor({ docId, onUnsupportedFeature }) {\n    if (this.constructor === BaseFontLoader) {\n      unreachable(\"Cannot initialize BaseFontLoader.\");\n    }\n    this.docId = docId;\n    this._onUnsupportedFeature = onUnsupportedFeature;\n\n    this.nativeFontFaces = [];\n    this.styleElement = null;\n  }\n\n  addNativeFontFace(nativeFontFace) {\n    this.nativeFontFaces.push(nativeFontFace);\n    document.fonts.add(nativeFontFace);\n  }\n\n  insertRule(rule) {\n    let styleElement = this.styleElement;\n    if (!styleElement) {\n      styleElement = this.styleElement = document.createElement(\"style\");\n      styleElement.id = `PDFJS_FONT_STYLE_TAG_${this.docId}`;\n      document.documentElement\n        .getElementsByTagName(\"head\")[0]\n        .appendChild(styleElement);\n    }\n\n    const styleSheet = styleElement.sheet;\n    styleSheet.insertRule(rule, styleSheet.cssRules.length);\n  }\n\n  clear() {\n    this.nativeFontFaces.forEach(function(nativeFontFace) {\n      document.fonts.delete(nativeFontFace);\n    });\n    this.nativeFontFaces.length = 0;\n\n    if (this.styleElement) {\n      // Note: ChildNode.remove doesn't throw if the parentNode is undefined.\n      this.styleElement.remove();\n      this.styleElement = null;\n    }\n  }\n\n  async bind(font) {\n    // Add the font to the DOM only once; skip if the font is already loaded.\n    if (font.attached || font.missingFile) {\n      return;\n    }\n    font.attached = true;\n\n    if (this.isFontLoadingAPISupported) {\n      const nativeFontFace = font.createNativeFontFace();\n      if (nativeFontFace) {\n        this.addNativeFontFace(nativeFontFace);\n        try {\n          await nativeFontFace.loaded;\n        } catch (ex) {\n          this._onUnsupportedFeature({ featureId: UNSUPPORTED_FEATURES.font });\n          warn(`Failed to load font '${nativeFontFace.family}': '${ex}'.`);\n\n          // When font loading failed, fall back to the built-in font renderer.\n          font.disableFontFace = true;\n          throw ex;\n        }\n      }\n      return; // The font was, asynchronously, loaded.\n    }\n\n    // !this.isFontLoadingAPISupported\n    const rule = font.createFontFaceRule();\n    if (rule) {\n      this.insertRule(rule);\n\n      if (this.isSyncFontLoadingSupported) {\n        return; // The font was, synchronously, loaded.\n      }\n      await new Promise(resolve => {\n        const request = this._queueLoadingCallback(resolve);\n        this._prepareFontLoadEvent([rule], [font], request);\n      });\n      // The font was, asynchronously, loaded.\n    }\n  }\n\n  _queueLoadingCallback(callback) {\n    unreachable(\"Abstract method `_queueLoadingCallback`.\");\n  }\n\n  get isFontLoadingAPISupported() {\n    const supported = typeof document !== \"undefined\" && !!document.fonts;\n    return shadow(this, \"isFontLoadingAPISupported\", supported);\n  }\n\n  // eslint-disable-next-line getter-return\n  get isSyncFontLoadingSupported() {\n    unreachable(\"Abstract method `isSyncFontLoadingSupported`.\");\n  }\n\n  // eslint-disable-next-line getter-return\n  get _loadTestFont() {\n    unreachable(\"Abstract method `_loadTestFont`.\");\n  }\n\n  _prepareFontLoadEvent(rules, fontsToLoad, request) {\n    unreachable(\"Abstract method `_prepareFontLoadEvent`.\");\n  }\n}\n\nlet FontLoader;\nif (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"MOZCENTRAL\")) {\n  FontLoader = class MozcentralFontLoader extends BaseFontLoader {\n    get isSyncFontLoadingSupported() {\n      return shadow(this, \"isSyncFontLoadingSupported\", true);\n    }\n  };\n} else {\n  // PDFJSDev.test('CHROME || GENERIC')\n\n  FontLoader = class GenericFontLoader extends BaseFontLoader {\n    constructor(docId) {\n      super(docId);\n      this.loadingContext = {\n        requests: [],\n        nextRequestId: 0,\n      };\n      this.loadTestFontId = 0;\n    }\n\n    get isSyncFontLoadingSupported() {\n      let supported = false;\n      if (typeof PDFJSDev === \"undefined\" || !PDFJSDev.test(\"CHROME\")) {\n        if (typeof navigator === \"undefined\") {\n          // Node.js - we can pretend that sync font loading is supported.\n          supported = true;\n        } else {\n          // User agent string sniffing is bad, but there is no reliable way to\n          // tell if the font is fully loaded and ready to be used with canvas.\n          const m = /Mozilla\\/5.0.*?rv:(\\d+).*? Gecko/.exec(\n            navigator.userAgent\n          );\n          if (m && m[1] >= 14) {\n            supported = true;\n          }\n          // TODO - other browsers...\n        }\n      }\n      return shadow(this, \"isSyncFontLoadingSupported\", supported);\n    }\n\n    _queueLoadingCallback(callback) {\n      function completeRequest() {\n        assert(!request.done, \"completeRequest() cannot be called twice.\");\n        request.done = true;\n\n        // Sending all completed requests in order of how they were queued.\n        while (context.requests.length > 0 && context.requests[0].done) {\n          const otherRequest = context.requests.shift();\n          setTimeout(otherRequest.callback, 0);\n        }\n      }\n\n      const context = this.loadingContext;\n      const request = {\n        id: `pdfjs-font-loading-${context.nextRequestId++}`,\n        done: false,\n        complete: completeRequest,\n        callback,\n      };\n      context.requests.push(request);\n      return request;\n    }\n\n    get _loadTestFont() {\n      const getLoadTestFont = function() {\n        // This is a CFF font with 1 glyph for '.' that fills its entire width\n        // and height.\n        return atob(\n          \"T1RUTwALAIAAAwAwQ0ZGIDHtZg4AAAOYAAAAgUZGVE1lkzZwAAAEHAAAABxHREVGABQA\" +\n            \"FQAABDgAAAAeT1MvMlYNYwkAAAEgAAAAYGNtYXABDQLUAAACNAAAAUJoZWFk/xVFDQAA\" +\n            \"ALwAAAA2aGhlYQdkA+oAAAD0AAAAJGhtdHgD6AAAAAAEWAAAAAZtYXhwAAJQAAAAARgA\" +\n            \"AAAGbmFtZVjmdH4AAAGAAAAAsXBvc3T/hgAzAAADeAAAACAAAQAAAAEAALZRFsRfDzz1\" +\n            \"AAsD6AAAAADOBOTLAAAAAM4KHDwAAAAAA+gDIQAAAAgAAgAAAAAAAAABAAADIQAAAFoD\" +\n            \"6AAAAAAD6AABAAAAAAAAAAAAAAAAAAAAAQAAUAAAAgAAAAQD6AH0AAUAAAKKArwAAACM\" +\n            \"AooCvAAAAeAAMQECAAACAAYJAAAAAAAAAAAAAQAAAAAAAAAAAAAAAFBmRWQAwAAuAC4D\" +\n            \"IP84AFoDIQAAAAAAAQAAAAAAAAAAACAAIAABAAAADgCuAAEAAAAAAAAAAQAAAAEAAAAA\" +\n            \"AAEAAQAAAAEAAAAAAAIAAQAAAAEAAAAAAAMAAQAAAAEAAAAAAAQAAQAAAAEAAAAAAAUA\" +\n            \"AQAAAAEAAAAAAAYAAQAAAAMAAQQJAAAAAgABAAMAAQQJAAEAAgABAAMAAQQJAAIAAgAB\" +\n            \"AAMAAQQJAAMAAgABAAMAAQQJAAQAAgABAAMAAQQJAAUAAgABAAMAAQQJAAYAAgABWABY\" +\n            \"AAAAAAAAAwAAAAMAAAAcAAEAAAAAADwAAwABAAAAHAAEACAAAAAEAAQAAQAAAC7//wAA\" +\n            \"AC7////TAAEAAAAAAAABBgAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\" +\n            \"AAAAAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\" +\n            \"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\" +\n            \"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\" +\n            \"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\" +\n            \"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMAAAAAAAD/gwAyAAAAAQAAAAAAAAAAAAAAAAAA\" +\n            \"AAABAAQEAAEBAQJYAAEBASH4DwD4GwHEAvgcA/gXBIwMAYuL+nz5tQXkD5j3CBLnEQAC\" +\n            \"AQEBIVhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYAAABAQAADwACAQEEE/t3\" +\n            \"Dov6fAH6fAT+fPp8+nwHDosMCvm1Cvm1DAz6fBQAAAAAAAABAAAAAMmJbzEAAAAAzgTj\" +\n            \"FQAAAADOBOQpAAEAAAAAAAAADAAUAAQAAAABAAAAAgABAAAAAAAAAAAD6AAAAAAAAA==\"\n        );\n      };\n      return shadow(this, \"_loadTestFont\", getLoadTestFont());\n    }\n\n    _prepareFontLoadEvent(rules, fonts, request) {\n      /** Hack begin */\n      // There's currently no event when a font has finished downloading so the\n      // following code is a dirty hack to 'guess' when a font is ready.\n      // It's assumed fonts are loaded in order, so add a known test font after\n      // the desired fonts and then test for the loading of that test font.\n\n      function int32(data, offset) {\n        return (\n          (data.charCodeAt(offset) << 24) |\n          (data.charCodeAt(offset + 1) << 16) |\n          (data.charCodeAt(offset + 2) << 8) |\n          (data.charCodeAt(offset + 3) & 0xff)\n        );\n      }\n      function spliceString(s, offset, remove, insert) {\n        const chunk1 = s.substring(0, offset);\n        const chunk2 = s.substring(offset + remove);\n        return chunk1 + insert + chunk2;\n      }\n      let i, ii;\n\n      // The temporary canvas is used to determine if fonts are loaded.\n      const canvas = document.createElement(\"canvas\");\n      canvas.width = 1;\n      canvas.height = 1;\n      const ctx = canvas.getContext(\"2d\");\n\n      let called = 0;\n      function isFontReady(name, callback) {\n        called++;\n        // With setTimeout clamping this gives the font ~100ms to load.\n        if (called > 30) {\n          warn(\"Load test font never loaded.\");\n          callback();\n          return;\n        }\n        ctx.font = \"30px \" + name;\n        ctx.fillText(\".\", 0, 20);\n        const imageData = ctx.getImageData(0, 0, 1, 1);\n        if (imageData.data[3] > 0) {\n          callback();\n          return;\n        }\n        setTimeout(isFontReady.bind(null, name, callback));\n      }\n\n      const loadTestFontId = `lt${Date.now()}${this.loadTestFontId++}`;\n      // Chromium seems to cache fonts based on a hash of the actual font data,\n      // so the font must be modified for each load test else it will appear to\n      // be loaded already.\n      // TODO: This could maybe be made faster by avoiding the btoa of the full\n      // font by splitting it in chunks before hand and padding the font id.\n      let data = this._loadTestFont;\n      const COMMENT_OFFSET = 976; // has to be on 4 byte boundary (for checksum)\n      data = spliceString(\n        data,\n        COMMENT_OFFSET,\n        loadTestFontId.length,\n        loadTestFontId\n      );\n      // CFF checksum is important for IE, adjusting it\n      const CFF_CHECKSUM_OFFSET = 16;\n      const XXXX_VALUE = 0x58585858; // the \"comment\" filled with 'X'\n      let checksum = int32(data, CFF_CHECKSUM_OFFSET);\n      for (i = 0, ii = loadTestFontId.length - 3; i < ii; i += 4) {\n        checksum = (checksum - XXXX_VALUE + int32(loadTestFontId, i)) | 0;\n      }\n      if (i < loadTestFontId.length) {\n        // align to 4 bytes boundary\n        checksum =\n          (checksum - XXXX_VALUE + int32(loadTestFontId + \"XXX\", i)) | 0;\n      }\n      data = spliceString(data, CFF_CHECKSUM_OFFSET, 4, string32(checksum));\n\n      const url = `url(data:font/opentype;base64,${btoa(data)});`;\n      const rule = `@font-face {font-family:\"${loadTestFontId}\";src:${url}}`;\n      this.insertRule(rule);\n\n      const names = [];\n      for (i = 0, ii = fonts.length; i < ii; i++) {\n        names.push(fonts[i].loadedName);\n      }\n      names.push(loadTestFontId);\n\n      const div = document.createElement(\"div\");\n      div.style.visibility = \"hidden\";\n      div.style.width = div.style.height = \"10px\";\n      div.style.position = \"absolute\";\n      div.style.top = div.style.left = \"0px\";\n\n      for (i = 0, ii = names.length; i < ii; ++i) {\n        const span = document.createElement(\"span\");\n        span.textContent = \"Hi\";\n        span.style.fontFamily = names[i];\n        div.appendChild(span);\n      }\n      document.body.appendChild(div);\n\n      isFontReady(loadTestFontId, function() {\n        document.body.removeChild(div);\n        request.complete();\n      });\n      /** Hack end */\n    }\n  };\n} // End of PDFJSDev.test('CHROME || GENERIC')\n\nclass FontFaceObject {\n  constructor(\n    translatedData,\n    {\n      isEvalSupported = true,\n      disableFontFace = false,\n      ignoreErrors = false,\n      onUnsupportedFeature = null,\n      fontRegistry = null,\n    }\n  ) {\n    this.compiledGlyphs = Object.create(null);\n    // importing translated data\n    for (const i in translatedData) {\n      this[i] = translatedData[i];\n    }\n    this.isEvalSupported = isEvalSupported !== false;\n    this.disableFontFace = disableFontFace === true;\n    this.ignoreErrors = ignoreErrors === true;\n    this._onUnsupportedFeature = onUnsupportedFeature;\n    this.fontRegistry = fontRegistry;\n  }\n\n  createNativeFontFace() {\n    if (!this.data || this.disableFontFace) {\n      return null;\n    }\n    const nativeFontFace = new FontFace(this.loadedName, this.data, {});\n\n    if (this.fontRegistry) {\n      this.fontRegistry.registerFont(this);\n    }\n    return nativeFontFace;\n  }\n\n  createFontFaceRule() {\n    if (!this.data || this.disableFontFace) {\n      return null;\n    }\n    const data = bytesToString(new Uint8Array(this.data));\n    // Add the @font-face rule to the document.\n    const url = `url(data:${this.mimetype};base64,${btoa(data)});`;\n    const rule = `@font-face {font-family:\"${this.loadedName}\";src:${url}}`;\n\n    if (this.fontRegistry) {\n      this.fontRegistry.registerFont(this, url);\n    }\n    return rule;\n  }\n\n  getPathGenerator(objs, character) {\n    if (this.compiledGlyphs[character] !== undefined) {\n      return this.compiledGlyphs[character];\n    }\n\n    let cmds, current;\n    try {\n      cmds = objs.get(this.loadedName + \"_path_\" + character);\n    } catch (ex) {\n      if (!this.ignoreErrors) {\n        throw ex;\n      }\n      if (this._onUnsupportedFeature) {\n        this._onUnsupportedFeature({ featureId: UNSUPPORTED_FEATURES.font });\n      }\n      warn(`getPathGenerator - ignoring character: \"${ex}\".`);\n\n      return (this.compiledGlyphs[character] = function(c, size) {\n        // No-op function, to allow rendering to continue.\n      });\n    }\n\n    // If we can, compile cmds into JS for MAXIMUM SPEED...\n    if (this.isEvalSupported && IsEvalSupportedCached.value) {\n      let args,\n        js = \"\";\n      for (let i = 0, ii = cmds.length; i < ii; i++) {\n        current = cmds[i];\n\n        if (current.args !== undefined) {\n          args = current.args.join(\",\");\n        } else {\n          args = \"\";\n        }\n        js += \"c.\" + current.cmd + \"(\" + args + \");\\n\";\n      }\n      // eslint-disable-next-line no-new-func\n      return (this.compiledGlyphs[character] = new Function(\"c\", \"size\", js));\n    }\n    // ... but fall back on using Function.prototype.apply() if we're\n    // blocked from using eval() for whatever reason (like CSP policies).\n    return (this.compiledGlyphs[character] = function(c, size) {\n      for (let i = 0, ii = cmds.length; i < ii; i++) {\n        current = cmds[i];\n\n        if (current.cmd === \"scale\") {\n          current.args = [size, -size];\n        }\n        c[current.cmd].apply(c, current.args);\n      }\n    });\n  }\n}\n\nexport { FontFaceObject, FontLoader };\n","/* Copyright 2018 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nconst compatibilityParams = Object.create(null);\nif (typeof PDFJSDev === \"undefined\" || PDFJSDev.test(\"GENERIC\")) {\n  const { isNodeJS } = require(\"../shared/is_node.js\");\n\n  const userAgent =\n    (typeof navigator !== \"undefined\" && navigator.userAgent) || \"\";\n  const isIE = /Trident/.test(userAgent);\n  const isIOSChrome = /CriOS/.test(userAgent);\n\n  // Checks if possible to use URL.createObjectURL()\n  // Support: IE, Chrome on iOS\n  (function checkOnBlobSupport() {\n    // Sometimes IE and Chrome on iOS losing the data created with\n    // createObjectURL(), see issues #3977 and #8081.\n    if (isIE || isIOSChrome) {\n      compatibilityParams.disableCreateObjectURL = true;\n    }\n  })();\n\n  // Support: Node.js\n  (function checkFontFaceAndImage() {\n    // Node.js is missing native support for `@font-face` and `Image`.\n    if (isNodeJS) {\n      compatibilityParams.disableFontFace = true;\n      compatibilityParams.nativeImageDecoderSupport = \"none\";\n    }\n  })();\n}\n\nexports.apiCompatibilityParams = Object.freeze(compatibilityParams);\n","/* Copyright 2018 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* globals process */\n\n// NW.js / Electron is a browser context, but copies some Node.js objects; see\n// http://docs.nwjs.io/en/latest/For%20Users/Advanced/JavaScript%20Contexts%20in%20NW.js/#access-nodejs-and-nwjs-api-in-browser-context\n// https://electronjs.org/docs/api/process#processversionselectron\nconst isNodeJS =\n  typeof process === \"object\" &&\n  process + \"\" === \"[object process]\" &&\n  !process.versions[\"nw\"] &&\n  !process.versions[\"electron\"];\n\nexport { isNodeJS };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport {\n  FONT_IDENTITY_MATRIX,\n  IDENTITY_MATRIX,\n  ImageKind,\n  info,\n  IsLittleEndianCached,\n  isNum,\n  OPS,\n  shadow,\n  TextRenderingMode,\n  unreachable,\n  Util,\n  warn,\n} from \"../shared/util.js\";\nimport { getShadingPatternFromIR, TilingPattern } from \"./pattern_helper.js\";\n\n// <canvas> contexts store most of the state we need natively.\n// However, PDF needs a bit more state, which we store here.\n\n// Minimal font size that would be used during canvas fillText operations.\nvar MIN_FONT_SIZE = 16;\n// Maximum font size that would be used during canvas fillText operations.\nvar MAX_FONT_SIZE = 100;\nvar MAX_GROUP_SIZE = 4096;\n\n// Heuristic value used when enforcing minimum line widths.\nvar MIN_WIDTH_FACTOR = 0.65;\n\nvar COMPILE_TYPE3_GLYPHS = true;\nvar MAX_SIZE_TO_COMPILE = 1000;\n\nvar FULL_CHUNK_HEIGHT = 16;\n\nfunction addContextCurrentTransform(ctx) {\n  // If the context doesn't expose a `mozCurrentTransform`, add a JS based one.\n  if (!ctx.mozCurrentTransform) {\n    ctx._originalSave = ctx.save;\n    ctx._originalRestore = ctx.restore;\n    ctx._originalRotate = ctx.rotate;\n    ctx._originalScale = ctx.scale;\n    ctx._originalTranslate = ctx.translate;\n    ctx._originalTransform = ctx.transform;\n    ctx._originalSetTransform = ctx.setTransform;\n\n    ctx._transformMatrix = ctx._transformMatrix || [1, 0, 0, 1, 0, 0];\n    ctx._transformStack = [];\n\n    Object.defineProperty(ctx, \"mozCurrentTransform\", {\n      get: function getCurrentTransform() {\n        return this._transformMatrix;\n      },\n    });\n\n    Object.defineProperty(ctx, \"mozCurrentTransformInverse\", {\n      get: function getCurrentTransformInverse() {\n        // Calculation done using WolframAlpha:\n        // http://www.wolframalpha.com/input/?\n        //   i=Inverse+{{a%2C+c%2C+e}%2C+{b%2C+d%2C+f}%2C+{0%2C+0%2C+1}}\n\n        var m = this._transformMatrix;\n        var a = m[0],\n          b = m[1],\n          c = m[2],\n          d = m[3],\n          e = m[4],\n          f = m[5];\n\n        var ad_bc = a * d - b * c;\n        var bc_ad = b * c - a * d;\n\n        return [\n          d / ad_bc,\n          b / bc_ad,\n          c / bc_ad,\n          a / ad_bc,\n          (d * e - c * f) / bc_ad,\n          (b * e - a * f) / ad_bc,\n        ];\n      },\n    });\n\n    ctx.save = function ctxSave() {\n      var old = this._transformMatrix;\n      this._transformStack.push(old);\n      this._transformMatrix = old.slice(0, 6);\n\n      this._originalSave();\n    };\n\n    ctx.restore = function ctxRestore() {\n      var prev = this._transformStack.pop();\n      if (prev) {\n        this._transformMatrix = prev;\n        this._originalRestore();\n      }\n    };\n\n    ctx.translate = function ctxTranslate(x, y) {\n      var m = this._transformMatrix;\n      m[4] = m[0] * x + m[2] * y + m[4];\n      m[5] = m[1] * x + m[3] * y + m[5];\n\n      this._originalTranslate(x, y);\n    };\n\n    ctx.scale = function ctxScale(x, y) {\n      var m = this._transformMatrix;\n      m[0] = m[0] * x;\n      m[1] = m[1] * x;\n      m[2] = m[2] * y;\n      m[3] = m[3] * y;\n\n      this._originalScale(x, y);\n    };\n\n    ctx.transform = function ctxTransform(a, b, c, d, e, f) {\n      var m = this._transformMatrix;\n      this._transformMatrix = [\n        m[0] * a + m[2] * b,\n        m[1] * a + m[3] * b,\n        m[0] * c + m[2] * d,\n        m[1] * c + m[3] * d,\n        m[0] * e + m[2] * f + m[4],\n        m[1] * e + m[3] * f + m[5],\n      ];\n\n      ctx._originalTransform(a, b, c, d, e, f);\n    };\n\n    ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) {\n      this._transformMatrix = [a, b, c, d, e, f];\n\n      ctx._originalSetTransform(a, b, c, d, e, f);\n    };\n\n    ctx.rotate = function ctxRotate(angle) {\n      var cosValue = Math.cos(angle);\n      var sinValue = Math.sin(angle);\n\n      var m = this._transformMatrix;\n      this._transformMatrix = [\n        m[0] * cosValue + m[2] * sinValue,\n        m[1] * cosValue + m[3] * sinValue,\n        m[0] * -sinValue + m[2] * cosValue,\n        m[1] * -sinValue + m[3] * cosValue,\n        m[4],\n        m[5],\n      ];\n\n      this._originalRotate(angle);\n    };\n  }\n}\n\nvar CachedCanvases = (function CachedCanvasesClosure() {\n  function CachedCanvases(canvasFactory) {\n    this.canvasFactory = canvasFactory;\n    this.cache = Object.create(null);\n  }\n  CachedCanvases.prototype = {\n    getCanvas: function CachedCanvases_getCanvas(\n      id,\n      width,\n      height,\n      trackTransform\n    ) {\n      var canvasEntry;\n      if (this.cache[id] !== undefined) {\n        canvasEntry = this.cache[id];\n        this.canvasFactory.reset(canvasEntry, width, height);\n        // reset canvas transform for emulated mozCurrentTransform, if needed\n        canvasEntry.context.setTransform(1, 0, 0, 1, 0, 0);\n      } else {\n        canvasEntry = this.canvasFactory.create(width, height);\n        this.cache[id] = canvasEntry;\n      }\n      if (trackTransform) {\n        addContextCurrentTransform(canvasEntry.context);\n      }\n      return canvasEntry;\n    },\n    clear() {\n      for (var id in this.cache) {\n        var canvasEntry = this.cache[id];\n        this.canvasFactory.destroy(canvasEntry);\n        delete this.cache[id];\n      }\n    },\n  };\n  return CachedCanvases;\n})();\n\nfunction compileType3Glyph(imgData) {\n  var POINT_TO_PROCESS_LIMIT = 1000;\n\n  var width = imgData.width,\n    height = imgData.height;\n  var i,\n    j,\n    j0,\n    width1 = width + 1;\n  var points = new Uint8Array(width1 * (height + 1));\n  // prettier-ignore\n  var POINT_TYPES =\n      new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]);\n\n  // decodes bit-packed mask data\n  var lineSize = (width + 7) & ~7,\n    data0 = imgData.data;\n  var data = new Uint8Array(lineSize * height),\n    pos = 0,\n    ii;\n  for (i = 0, ii = data0.length; i < ii; i++) {\n    var mask = 128,\n      elem = data0[i];\n    while (mask > 0) {\n      data[pos++] = elem & mask ? 0 : 255;\n      mask >>= 1;\n    }\n  }\n\n  // finding interesting points: every point is located between mask pixels,\n  // so there will be points of the (width + 1)x(height + 1) grid. Every point\n  // will have flags assigned based on neighboring mask pixels:\n  //   4 | 8\n  //   --P--\n  //   2 | 1\n  // We are interested only in points with the flags:\n  //   - outside corners: 1, 2, 4, 8;\n  //   - inside corners: 7, 11, 13, 14;\n  //   - and, intersections: 5, 10.\n  var count = 0;\n  pos = 0;\n  if (data[pos] !== 0) {\n    points[0] = 1;\n    ++count;\n  }\n  for (j = 1; j < width; j++) {\n    if (data[pos] !== data[pos + 1]) {\n      points[j] = data[pos] ? 2 : 1;\n      ++count;\n    }\n    pos++;\n  }\n  if (data[pos] !== 0) {\n    points[j] = 2;\n    ++count;\n  }\n  for (i = 1; i < height; i++) {\n    pos = i * lineSize;\n    j0 = i * width1;\n    if (data[pos - lineSize] !== data[pos]) {\n      points[j0] = data[pos] ? 1 : 8;\n      ++count;\n    }\n    // 'sum' is the position of the current pixel configuration in the 'TYPES'\n    // array (in order 8-1-2-4, so we can use '>>2' to shift the column).\n    var sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0);\n    for (j = 1; j < width; j++) {\n      sum =\n        (sum >> 2) +\n        (data[pos + 1] ? 4 : 0) +\n        (data[pos - lineSize + 1] ? 8 : 0);\n      if (POINT_TYPES[sum]) {\n        points[j0 + j] = POINT_TYPES[sum];\n        ++count;\n      }\n      pos++;\n    }\n    if (data[pos - lineSize] !== data[pos]) {\n      points[j0 + j] = data[pos] ? 2 : 4;\n      ++count;\n    }\n\n    if (count > POINT_TO_PROCESS_LIMIT) {\n      return null;\n    }\n  }\n\n  pos = lineSize * (height - 1);\n  j0 = i * width1;\n  if (data[pos] !== 0) {\n    points[j0] = 8;\n    ++count;\n  }\n  for (j = 1; j < width; j++) {\n    if (data[pos] !== data[pos + 1]) {\n      points[j0 + j] = data[pos] ? 4 : 8;\n      ++count;\n    }\n    pos++;\n  }\n  if (data[pos] !== 0) {\n    points[j0 + j] = 4;\n    ++count;\n  }\n  if (count > POINT_TO_PROCESS_LIMIT) {\n    return null;\n  }\n\n  // building outlines\n  var steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]);\n  var outlines = [];\n  for (i = 0; count && i <= height; i++) {\n    var p = i * width1;\n    var end = p + width;\n    while (p < end && !points[p]) {\n      p++;\n    }\n    if (p === end) {\n      continue;\n    }\n    var coords = [p % width1, i];\n\n    var type = points[p],\n      p0 = p,\n      pp;\n    do {\n      var step = steps[type];\n      do {\n        p += step;\n      } while (!points[p]);\n\n      pp = points[p];\n      if (pp !== 5 && pp !== 10) {\n        // set new direction\n        type = pp;\n        // delete mark\n        points[p] = 0;\n      } else {\n        // type is 5 or 10, ie, a crossing\n        // set new direction\n        type = pp & ((0x33 * type) >> 4);\n        // set new type for \"future hit\"\n        points[p] &= (type >> 2) | (type << 2);\n      }\n\n      coords.push(p % width1);\n      coords.push((p / width1) | 0);\n\n      if (!points[p]) {\n        --count;\n      }\n    } while (p0 !== p);\n    outlines.push(coords);\n    --i;\n  }\n\n  var drawOutline = function(c) {\n    c.save();\n    // the path shall be painted in [0..1]x[0..1] space\n    c.scale(1 / width, -1 / height);\n    c.translate(0, -height);\n    c.beginPath();\n    for (var i = 0, ii = outlines.length; i < ii; i++) {\n      var o = outlines[i];\n      c.moveTo(o[0], o[1]);\n      for (var j = 2, jj = o.length; j < jj; j += 2) {\n        c.lineTo(o[j], o[j + 1]);\n      }\n    }\n    c.fill();\n    c.beginPath();\n    c.restore();\n  };\n\n  return drawOutline;\n}\n\nvar CanvasExtraState = (function CanvasExtraStateClosure() {\n  function CanvasExtraState() {\n    // Are soft masks and alpha values shapes or opacities?\n    this.alphaIsShape = false;\n    this.fontSize = 0;\n    this.fontSizeScale = 1;\n    this.textMatrix = IDENTITY_MATRIX;\n    this.textMatrixScale = 1;\n    this.fontMatrix = FONT_IDENTITY_MATRIX;\n    this.leading = 0;\n    // Current point (in user coordinates)\n    this.x = 0;\n    this.y = 0;\n    // Start of text line (in text coordinates)\n    this.lineX = 0;\n    this.lineY = 0;\n    // Character and word spacing\n    this.charSpacing = 0;\n    this.wordSpacing = 0;\n    this.textHScale = 1;\n    this.textRenderingMode = TextRenderingMode.FILL;\n    this.textRise = 0;\n    // Default fore and background colors\n    this.fillColor = \"#000000\";\n    this.strokeColor = \"#000000\";\n    this.patternFill = false;\n    // Note: fill alpha applies to all non-stroking operations\n    this.fillAlpha = 1;\n    this.strokeAlpha = 1;\n    this.lineWidth = 1;\n    this.activeSMask = null;\n    this.resumeSMaskCtx = null; // nonclonable field (see the save method below)\n  }\n\n  CanvasExtraState.prototype = {\n    clone: function CanvasExtraState_clone() {\n      return Object.create(this);\n    },\n    setCurrentPoint: function CanvasExtraState_setCurrentPoint(x, y) {\n      this.x = x;\n      this.y = y;\n    },\n  };\n  return CanvasExtraState;\n})();\n\nvar CanvasGraphics = (function CanvasGraphicsClosure() {\n  // Defines the time the executeOperatorList is going to be executing\n  // before it stops and shedules a continue of execution.\n  var EXECUTION_TIME = 15;\n  // Defines the number of steps before checking the execution time\n  var EXECUTION_STEPS = 10;\n\n  function CanvasGraphics(\n    canvasCtx,\n    commonObjs,\n    objs,\n    canvasFactory,\n    webGLContext,\n    imageLayer\n  ) {\n    this.ctx = canvasCtx;\n    this.current = new CanvasExtraState();\n    this.stateStack = [];\n    this.pendingClip = null;\n    this.pendingEOFill = false;\n    this.res = null;\n    this.xobjs = null;\n    this.commonObjs = commonObjs;\n    this.objs = objs;\n    this.canvasFactory = canvasFactory;\n    this.webGLContext = webGLContext;\n    this.imageLayer = imageLayer;\n    this.groupStack = [];\n    this.processingType3 = null;\n    // Patterns are painted relative to the initial page/form transform, see pdf\n    // spec 8.7.2 NOTE 1.\n    this.baseTransform = null;\n    this.baseTransformStack = [];\n    this.groupLevel = 0;\n    this.smaskStack = [];\n    this.smaskCounter = 0;\n    this.tempSMask = null;\n    this.cachedCanvases = new CachedCanvases(this.canvasFactory);\n    if (canvasCtx) {\n      // NOTE: if mozCurrentTransform is polyfilled, then the current state of\n      // the transformation must already be set in canvasCtx._transformMatrix.\n      addContextCurrentTransform(canvasCtx);\n    }\n    this._cachedGetSinglePixelWidth = null;\n  }\n\n  function putBinaryImageData(ctx, imgData) {\n    if (typeof ImageData !== \"undefined\" && imgData instanceof ImageData) {\n      ctx.putImageData(imgData, 0, 0);\n      return;\n    }\n\n    // Put the image data to the canvas in chunks, rather than putting the\n    // whole image at once.  This saves JS memory, because the ImageData object\n    // is smaller. It also possibly saves C++ memory within the implementation\n    // of putImageData(). (E.g. in Firefox we make two short-lived copies of\n    // the data passed to putImageData()). |n| shouldn't be too small, however,\n    // because too many putImageData() calls will slow things down.\n    //\n    // Note: as written, if the last chunk is partial, the putImageData() call\n    // will (conceptually) put pixels past the bounds of the canvas.  But\n    // that's ok; any such pixels are ignored.\n\n    var height = imgData.height,\n      width = imgData.width;\n    var partialChunkHeight = height % FULL_CHUNK_HEIGHT;\n    var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;\n    var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;\n\n    var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);\n    var srcPos = 0,\n      destPos;\n    var src = imgData.data;\n    var dest = chunkImgData.data;\n    var i, j, thisChunkHeight, elemsInThisChunk;\n\n    // There are multiple forms in which the pixel data can be passed, and\n    // imgData.kind tells us which one this is.\n    if (imgData.kind === ImageKind.GRAYSCALE_1BPP) {\n      // Grayscale, 1 bit per pixel (i.e. black-and-white).\n      var srcLength = src.byteLength;\n      var dest32 = new Uint32Array(dest.buffer, 0, dest.byteLength >> 2);\n      var dest32DataLength = dest32.length;\n      var fullSrcDiff = (width + 7) >> 3;\n      var white = 0xffffffff;\n      var black = IsLittleEndianCached.value ? 0xff000000 : 0x000000ff;\n      for (i = 0; i < totalChunks; i++) {\n        thisChunkHeight =\n          i < fullChunks ? FULL_CHUNK_HEIGHT : partialChunkHeight;\n        destPos = 0;\n        for (j = 0; j < thisChunkHeight; j++) {\n          var srcDiff = srcLength - srcPos;\n          var k = 0;\n          var kEnd = srcDiff > fullSrcDiff ? width : srcDiff * 8 - 7;\n          var kEndUnrolled = kEnd & ~7;\n          var mask = 0;\n          var srcByte = 0;\n          for (; k < kEndUnrolled; k += 8) {\n            srcByte = src[srcPos++];\n            dest32[destPos++] = srcByte & 128 ? white : black;\n            dest32[destPos++] = srcByte & 64 ? white : black;\n            dest32[destPos++] = srcByte & 32 ? white : black;\n            dest32[destPos++] = srcByte & 16 ? white : black;\n            dest32[destPos++] = srcByte & 8 ? white : black;\n            dest32[destPos++] = srcByte & 4 ? white : black;\n            dest32[destPos++] = srcByte & 2 ? white : black;\n            dest32[destPos++] = srcByte & 1 ? white : black;\n          }\n          for (; k < kEnd; k++) {\n            if (mask === 0) {\n              srcByte = src[srcPos++];\n              mask = 128;\n            }\n\n            dest32[destPos++] = srcByte & mask ? white : black;\n            mask >>= 1;\n          }\n        }\n        // We ran out of input. Make all remaining pixels transparent.\n        while (destPos < dest32DataLength) {\n          dest32[destPos++] = 0;\n        }\n\n        ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);\n      }\n    } else if (imgData.kind === ImageKind.RGBA_32BPP) {\n      // RGBA, 32-bits per pixel.\n\n      j = 0;\n      elemsInThisChunk = width * FULL_CHUNK_HEIGHT * 4;\n      for (i = 0; i < fullChunks; i++) {\n        dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));\n        srcPos += elemsInThisChunk;\n\n        ctx.putImageData(chunkImgData, 0, j);\n        j += FULL_CHUNK_HEIGHT;\n      }\n      if (i < totalChunks) {\n        elemsInThisChunk = width * partialChunkHeight * 4;\n        dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));\n        ctx.putImageData(chunkImgData, 0, j);\n      }\n    } else if (imgData.kind === ImageKind.RGB_24BPP) {\n      // RGB, 24-bits per pixel.\n      thisChunkHeight = FULL_CHUNK_HEIGHT;\n      elemsInThisChunk = width * thisChunkHeight;\n      for (i = 0; i < totalChunks; i++) {\n        if (i >= fullChunks) {\n          thisChunkHeight = partialChunkHeight;\n          elemsInThisChunk = width * thisChunkHeight;\n        }\n\n        destPos = 0;\n        for (j = elemsInThisChunk; j--; ) {\n          dest[destPos++] = src[srcPos++];\n          dest[destPos++] = src[srcPos++];\n          dest[destPos++] = src[srcPos++];\n          dest[destPos++] = 255;\n        }\n        ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);\n      }\n    } else {\n      throw new Error(`bad image kind: ${imgData.kind}`);\n    }\n  }\n\n  function putBinaryImageMask(ctx, imgData) {\n    var height = imgData.height,\n      width = imgData.width;\n    var partialChunkHeight = height % FULL_CHUNK_HEIGHT;\n    var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;\n    var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;\n\n    var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);\n    var srcPos = 0;\n    var src = imgData.data;\n    var dest = chunkImgData.data;\n\n    for (var i = 0; i < totalChunks; i++) {\n      var thisChunkHeight =\n        i < fullChunks ? FULL_CHUNK_HEIGHT : partialChunkHeight;\n\n      // Expand the mask so it can be used by the canvas.  Any required\n      // inversion has already been handled.\n      var destPos = 3; // alpha component offset\n      for (var j = 0; j < thisChunkHeight; j++) {\n        var mask = 0;\n        for (var k = 0; k < width; k++) {\n          if (!mask) {\n            var elem = src[srcPos++];\n            mask = 128;\n          }\n          dest[destPos] = elem & mask ? 0 : 255;\n          destPos += 4;\n          mask >>= 1;\n        }\n      }\n      ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);\n    }\n  }\n\n  function copyCtxState(sourceCtx, destCtx) {\n    var properties = [\n      \"strokeStyle\",\n      \"fillStyle\",\n      \"fillRule\",\n      \"globalAlpha\",\n      \"lineWidth\",\n      \"lineCap\",\n      \"lineJoin\",\n      \"miterLimit\",\n      \"globalCompositeOperation\",\n      \"font\",\n    ];\n    for (var i = 0, ii = properties.length; i < ii; i++) {\n      var property = properties[i];\n      if (sourceCtx[property] !== undefined) {\n        destCtx[property] = sourceCtx[property];\n      }\n    }\n    if (sourceCtx.setLineDash !== undefined) {\n      destCtx.setLineDash(sourceCtx.getLineDash());\n      destCtx.lineDashOffset = sourceCtx.lineDashOffset;\n    }\n  }\n\n  function resetCtxToDefault(ctx) {\n    ctx.strokeStyle = \"#000000\";\n    ctx.fillStyle = \"#000000\";\n    ctx.fillRule = \"nonzero\";\n    ctx.globalAlpha = 1;\n    ctx.lineWidth = 1;\n    ctx.lineCap = \"butt\";\n    ctx.lineJoin = \"miter\";\n    ctx.miterLimit = 10;\n    ctx.globalCompositeOperation = \"source-over\";\n    ctx.font = \"10px sans-serif\";\n    if (ctx.setLineDash !== undefined) {\n      ctx.setLineDash([]);\n      ctx.lineDashOffset = 0;\n    }\n  }\n\n  function composeSMaskBackdrop(bytes, r0, g0, b0) {\n    var length = bytes.length;\n    for (var i = 3; i < length; i += 4) {\n      var alpha = bytes[i];\n      if (alpha === 0) {\n        bytes[i - 3] = r0;\n        bytes[i - 2] = g0;\n        bytes[i - 1] = b0;\n      } else if (alpha < 255) {\n        var alpha_ = 255 - alpha;\n        bytes[i - 3] = (bytes[i - 3] * alpha + r0 * alpha_) >> 8;\n        bytes[i - 2] = (bytes[i - 2] * alpha + g0 * alpha_) >> 8;\n        bytes[i - 1] = (bytes[i - 1] * alpha + b0 * alpha_) >> 8;\n      }\n    }\n  }\n\n  function composeSMaskAlpha(maskData, layerData, transferMap) {\n    var length = maskData.length;\n    var scale = 1 / 255;\n    for (var i = 3; i < length; i += 4) {\n      var alpha = transferMap ? transferMap[maskData[i]] : maskData[i];\n      layerData[i] = (layerData[i] * alpha * scale) | 0;\n    }\n  }\n\n  function composeSMaskLuminosity(maskData, layerData, transferMap) {\n    var length = maskData.length;\n    for (var i = 3; i < length; i += 4) {\n      var y =\n        maskData[i - 3] * 77 + // * 0.3 / 255 * 0x10000\n        maskData[i - 2] * 152 + // * 0.59 ....\n        maskData[i - 1] * 28; // * 0.11 ....\n      layerData[i] = transferMap\n        ? (layerData[i] * transferMap[y >> 8]) >> 8\n        : (layerData[i] * y) >> 16;\n    }\n  }\n\n  function genericComposeSMask(\n    maskCtx,\n    layerCtx,\n    width,\n    height,\n    subtype,\n    backdrop,\n    transferMap\n  ) {\n    var hasBackdrop = !!backdrop;\n    var r0 = hasBackdrop ? backdrop[0] : 0;\n    var g0 = hasBackdrop ? backdrop[1] : 0;\n    var b0 = hasBackdrop ? backdrop[2] : 0;\n\n    var composeFn;\n    if (subtype === \"Luminosity\") {\n      composeFn = composeSMaskLuminosity;\n    } else {\n      composeFn = composeSMaskAlpha;\n    }\n\n    // processing image in chunks to save memory\n    var PIXELS_TO_PROCESS = 1048576;\n    var chunkSize = Math.min(height, Math.ceil(PIXELS_TO_PROCESS / width));\n    for (var row = 0; row < height; row += chunkSize) {\n      var chunkHeight = Math.min(chunkSize, height - row);\n      var maskData = maskCtx.getImageData(0, row, width, chunkHeight);\n      var layerData = layerCtx.getImageData(0, row, width, chunkHeight);\n\n      if (hasBackdrop) {\n        composeSMaskBackdrop(maskData.data, r0, g0, b0);\n      }\n      composeFn(maskData.data, layerData.data, transferMap);\n\n      maskCtx.putImageData(layerData, 0, row);\n    }\n  }\n\n  function composeSMask(ctx, smask, layerCtx, webGLContext) {\n    var mask = smask.canvas;\n    var maskCtx = smask.context;\n\n    ctx.setTransform(\n      smask.scaleX,\n      0,\n      0,\n      smask.scaleY,\n      smask.offsetX,\n      smask.offsetY\n    );\n\n    var backdrop = smask.backdrop || null;\n    if (!smask.transferMap && webGLContext.isEnabled) {\n      const composed = webGLContext.composeSMask({\n        layer: layerCtx.canvas,\n        mask,\n        properties: {\n          subtype: smask.subtype,\n          backdrop,\n        },\n      });\n      ctx.setTransform(1, 0, 0, 1, 0, 0);\n      ctx.drawImage(composed, smask.offsetX, smask.offsetY);\n      return;\n    }\n    genericComposeSMask(\n      maskCtx,\n      layerCtx,\n      mask.width,\n      mask.height,\n      smask.subtype,\n      backdrop,\n      smask.transferMap\n    );\n    ctx.drawImage(mask, 0, 0);\n  }\n\n  var LINE_CAP_STYLES = [\"butt\", \"round\", \"square\"];\n  var LINE_JOIN_STYLES = [\"miter\", \"round\", \"bevel\"];\n  var NORMAL_CLIP = {};\n  var EO_CLIP = {};\n\n  CanvasGraphics.prototype = {\n    beginDrawing({\n      transform,\n      viewport,\n      transparency = false,\n      background = null,\n    }) {\n      // For pdfs that use blend modes we have to clear the canvas else certain\n      // blend modes can look wrong since we'd be blending with a white\n      // backdrop. The problem with a transparent backdrop though is we then\n      // don't get sub pixel anti aliasing on text, creating temporary\n      // transparent canvas when we have blend modes.\n      var width = this.ctx.canvas.width;\n      var height = this.ctx.canvas.height;\n\n      this.ctx.save();\n      this.ctx.fillStyle = background || \"rgb(255, 255, 255)\";\n      this.ctx.fillRect(0, 0, width, height);\n      this.ctx.restore();\n\n      if (transparency) {\n        var transparentCanvas = this.cachedCanvases.getCanvas(\n          \"transparent\",\n          width,\n          height,\n          true\n        );\n        this.compositeCtx = this.ctx;\n        this.transparentCanvas = transparentCanvas.canvas;\n        this.ctx = transparentCanvas.context;\n        this.ctx.save();\n        // The transform can be applied before rendering, transferring it to\n        // the new canvas.\n        this.ctx.transform.apply(\n          this.ctx,\n          this.compositeCtx.mozCurrentTransform\n        );\n      }\n\n      this.ctx.save();\n      resetCtxToDefault(this.ctx);\n      if (transform) {\n        this.ctx.transform.apply(this.ctx, transform);\n      }\n      this.ctx.transform.apply(this.ctx, viewport.transform);\n\n      this.baseTransform = this.ctx.mozCurrentTransform.slice();\n\n      if (this.imageLayer) {\n        this.imageLayer.beginLayout();\n      }\n    },\n\n    executeOperatorList: function CanvasGraphics_executeOperatorList(\n      operatorList,\n      executionStartIdx,\n      continueCallback,\n      stepper\n    ) {\n      var argsArray = operatorList.argsArray;\n      var fnArray = operatorList.fnArray;\n      var i = executionStartIdx || 0;\n      var argsArrayLen = argsArray.length;\n\n      // Sometimes the OperatorList to execute is empty.\n      if (argsArrayLen === i) {\n        return i;\n      }\n\n      var chunkOperations =\n        argsArrayLen - i > EXECUTION_STEPS &&\n        typeof continueCallback === \"function\";\n      var endTime = chunkOperations ? Date.now() + EXECUTION_TIME : 0;\n      var steps = 0;\n\n      var commonObjs = this.commonObjs;\n      var objs = this.objs;\n      var fnId;\n\n      while (true) {\n        if (stepper !== undefined && i === stepper.nextBreakPoint) {\n          stepper.breakIt(i, continueCallback);\n          return i;\n        }\n\n        fnId = fnArray[i];\n\n        if (fnId !== OPS.dependency) {\n          this[fnId].apply(this, argsArray[i]);\n        } else {\n          for (const depObjId of argsArray[i]) {\n            const objsPool = depObjId.startsWith(\"g_\") ? commonObjs : objs;\n\n            // If the promise isn't resolved yet, add the continueCallback\n            // to the promise and bail out.\n            if (!objsPool.has(depObjId)) {\n              objsPool.get(depObjId, continueCallback);\n              return i;\n            }\n          }\n        }\n\n        i++;\n\n        // If the entire operatorList was executed, stop as were done.\n        if (i === argsArrayLen) {\n          return i;\n        }\n\n        // If the execution took longer then a certain amount of time and\n        // `continueCallback` is specified, interrupt the execution.\n        if (chunkOperations && ++steps > EXECUTION_STEPS) {\n          if (Date.now() > endTime) {\n            continueCallback();\n            return i;\n          }\n          steps = 0;\n        }\n\n        // If the operatorList isn't executed completely yet OR the execution\n        // time was short enough, do another execution round.\n      }\n    },\n\n    endDrawing: function CanvasGraphics_endDrawing() {\n      // Finishing all opened operations such as SMask group painting.\n      if (this.current.activeSMask !== null) {\n        this.endSMaskGroup();\n      }\n\n      this.ctx.restore();\n\n      if (this.transparentCanvas) {\n        this.ctx = this.compositeCtx;\n        this.ctx.save();\n        this.ctx.setTransform(1, 0, 0, 1, 0, 0); // Avoid apply transform twice\n        this.ctx.drawImage(this.transparentCanvas, 0, 0);\n        this.ctx.restore();\n        this.transparentCanvas = null;\n      }\n\n      this.cachedCanvases.clear();\n      this.webGLContext.clear();\n\n      if (this.imageLayer) {\n        this.imageLayer.endLayout();\n      }\n    },\n\n    // Graphics state\n    setLineWidth: function CanvasGraphics_setLineWidth(width) {\n      this.current.lineWidth = width;\n      this.ctx.lineWidth = width;\n    },\n    setLineCap: function CanvasGraphics_setLineCap(style) {\n      this.ctx.lineCap = LINE_CAP_STYLES[style];\n    },\n    setLineJoin: function CanvasGraphics_setLineJoin(style) {\n      this.ctx.lineJoin = LINE_JOIN_STYLES[style];\n    },\n    setMiterLimit: function CanvasGraphics_setMiterLimit(limit) {\n      this.ctx.miterLimit = limit;\n    },\n    setDash: function CanvasGraphics_setDash(dashArray, dashPhase) {\n      var ctx = this.ctx;\n      if (ctx.setLineDash !== undefined) {\n        ctx.setLineDash(dashArray);\n        ctx.lineDashOffset = dashPhase;\n      }\n    },\n    setRenderingIntent(intent) {\n      // This operation is ignored since we haven't found a use case for it yet.\n    },\n    setFlatness(flatness) {\n      // This operation is ignored since we haven't found a use case for it yet.\n    },\n    setGState: function CanvasGraphics_setGState(states) {\n      for (var i = 0, ii = states.length; i < ii; i++) {\n        var state = states[i];\n        var key = state[0];\n        var value = state[1];\n\n        switch (key) {\n          case \"LW\":\n            this.setLineWidth(value);\n            break;\n          case \"LC\":\n            this.setLineCap(value);\n            break;\n          case \"LJ\":\n            this.setLineJoin(value);\n            break;\n          case \"ML\":\n            this.setMiterLimit(value);\n            break;\n          case \"D\":\n            this.setDash(value[0], value[1]);\n            break;\n          case \"RI\":\n            this.setRenderingIntent(value);\n            break;\n          case \"FL\":\n            this.setFlatness(value);\n            break;\n          case \"Font\":\n            this.setFont(value[0], value[1]);\n            break;\n          case \"CA\":\n            this.current.strokeAlpha = state[1];\n            break;\n          case \"ca\":\n            this.current.fillAlpha = state[1];\n            this.ctx.globalAlpha = state[1];\n            break;\n          case \"BM\":\n            this.ctx.globalCompositeOperation = value;\n            break;\n          case \"SMask\":\n            if (this.current.activeSMask) {\n              // If SMask is currrenly used, it needs to be suspended or\n              // finished. Suspend only makes sense when at least one save()\n              // was performed and state needs to be reverted on restore().\n              if (\n                this.stateStack.length > 0 &&\n                this.stateStack[this.stateStack.length - 1].activeSMask ===\n                  this.current.activeSMask\n              ) {\n                this.suspendSMaskGroup();\n              } else {\n                this.endSMaskGroup();\n              }\n            }\n            this.current.activeSMask = value ? this.tempSMask : null;\n            if (this.current.activeSMask) {\n              this.beginSMaskGroup();\n            }\n            this.tempSMask = null;\n            break;\n        }\n      }\n    },\n    beginSMaskGroup: function CanvasGraphics_beginSMaskGroup() {\n      var activeSMask = this.current.activeSMask;\n      var drawnWidth = activeSMask.canvas.width;\n      var drawnHeight = activeSMask.canvas.height;\n      var cacheId = \"smaskGroupAt\" + this.groupLevel;\n      var scratchCanvas = this.cachedCanvases.getCanvas(\n        cacheId,\n        drawnWidth,\n        drawnHeight,\n        true\n      );\n\n      var currentCtx = this.ctx;\n      var currentTransform = currentCtx.mozCurrentTransform;\n      this.ctx.save();\n\n      var groupCtx = scratchCanvas.context;\n      groupCtx.scale(1 / activeSMask.scaleX, 1 / activeSMask.scaleY);\n      groupCtx.translate(-activeSMask.offsetX, -activeSMask.offsetY);\n      groupCtx.transform.apply(groupCtx, currentTransform);\n\n      activeSMask.startTransformInverse = groupCtx.mozCurrentTransformInverse;\n\n      copyCtxState(currentCtx, groupCtx);\n      this.ctx = groupCtx;\n      this.setGState([\n        [\"BM\", \"source-over\"],\n        [\"ca\", 1],\n        [\"CA\", 1],\n      ]);\n      this.groupStack.push(currentCtx);\n      this.groupLevel++;\n    },\n    suspendSMaskGroup: function CanvasGraphics_endSMaskGroup() {\n      // Similar to endSMaskGroup, the intermediate canvas has to be composed\n      // and future ctx state restored.\n      var groupCtx = this.ctx;\n      this.groupLevel--;\n      this.ctx = this.groupStack.pop();\n\n      composeSMask(\n        this.ctx,\n        this.current.activeSMask,\n        groupCtx,\n        this.webGLContext\n      );\n      this.ctx.restore();\n      this.ctx.save(); // save is needed since SMask will be resumed.\n      copyCtxState(groupCtx, this.ctx);\n\n      // Saving state for resuming.\n      this.current.resumeSMaskCtx = groupCtx;\n      // Transform was changed in the SMask canvas, reflecting this change on\n      // this.ctx.\n      var deltaTransform = Util.transform(\n        this.current.activeSMask.startTransformInverse,\n        groupCtx.mozCurrentTransform\n      );\n      this.ctx.transform.apply(this.ctx, deltaTransform);\n\n      // SMask was composed, the results at the groupCtx can be cleared.\n      groupCtx.save();\n      groupCtx.setTransform(1, 0, 0, 1, 0, 0);\n      groupCtx.clearRect(0, 0, groupCtx.canvas.width, groupCtx.canvas.height);\n      groupCtx.restore();\n    },\n    resumeSMaskGroup: function CanvasGraphics_endSMaskGroup() {\n      // Resuming state saved by suspendSMaskGroup. We don't need to restore\n      // any groupCtx state since restore() command (the only caller) will do\n      // that for us. See also beginSMaskGroup.\n      var groupCtx = this.current.resumeSMaskCtx;\n      var currentCtx = this.ctx;\n      this.ctx = groupCtx;\n      this.groupStack.push(currentCtx);\n      this.groupLevel++;\n    },\n    endSMaskGroup: function CanvasGraphics_endSMaskGroup() {\n      var groupCtx = this.ctx;\n      this.groupLevel--;\n      this.ctx = this.groupStack.pop();\n\n      composeSMask(\n        this.ctx,\n        this.current.activeSMask,\n        groupCtx,\n        this.webGLContext\n      );\n      this.ctx.restore();\n      copyCtxState(groupCtx, this.ctx);\n      // Transform was changed in the SMask canvas, reflecting this change on\n      // this.ctx.\n      var deltaTransform = Util.transform(\n        this.current.activeSMask.startTransformInverse,\n        groupCtx.mozCurrentTransform\n      );\n      this.ctx.transform.apply(this.ctx, deltaTransform);\n    },\n    save: function CanvasGraphics_save() {\n      this.ctx.save();\n      var old = this.current;\n      this.stateStack.push(old);\n      this.current = old.clone();\n      this.current.resumeSMaskCtx = null;\n    },\n    restore: function CanvasGraphics_restore() {\n      // SMask was suspended, we just need to resume it.\n      if (this.current.resumeSMaskCtx) {\n        this.resumeSMaskGroup();\n      }\n      // SMask has to be finished once there is no states that are using the\n      // same SMask.\n      if (\n        this.current.activeSMask !== null &&\n        (this.stateStack.length === 0 ||\n          this.stateStack[this.stateStack.length - 1].activeSMask !==\n            this.current.activeSMask)\n      ) {\n        this.endSMaskGroup();\n      }\n\n      if (this.stateStack.length !== 0) {\n        this.current = this.stateStack.pop();\n        this.ctx.restore();\n\n        // Ensure that the clipping path is reset (fixes issue6413.pdf).\n        this.pendingClip = null;\n\n        this._cachedGetSinglePixelWidth = null;\n      }\n    },\n    transform: function CanvasGraphics_transform(a, b, c, d, e, f) {\n      this.ctx.transform(a, b, c, d, e, f);\n\n      this._cachedGetSinglePixelWidth = null;\n    },\n\n    // Path\n    constructPath: function CanvasGraphics_constructPath(ops, args) {\n      var ctx = this.ctx;\n      var current = this.current;\n      var x = current.x,\n        y = current.y;\n      for (var i = 0, j = 0, ii = ops.length; i < ii; i++) {\n        switch (ops[i] | 0) {\n          case OPS.rectangle:\n            x = args[j++];\n            y = args[j++];\n            var width = args[j++];\n            var height = args[j++];\n            if (width === 0) {\n              width = this.getSinglePixelWidth();\n            }\n            if (height === 0) {\n              height = this.getSinglePixelWidth();\n            }\n            var xw = x + width;\n            var yh = y + height;\n            this.ctx.moveTo(x, y);\n            this.ctx.lineTo(xw, y);\n            this.ctx.lineTo(xw, yh);\n            this.ctx.lineTo(x, yh);\n            this.ctx.lineTo(x, y);\n            this.ctx.closePath();\n            break;\n          case OPS.moveTo:\n            x = args[j++];\n            y = args[j++];\n            ctx.moveTo(x, y);\n            break;\n          case OPS.lineTo:\n            x = args[j++];\n            y = args[j++];\n            ctx.lineTo(x, y);\n            break;\n          case OPS.curveTo:\n            x = args[j + 4];\n            y = args[j + 5];\n            ctx.bezierCurveTo(\n              args[j],\n              args[j + 1],\n              args[j + 2],\n              args[j + 3],\n              x,\n              y\n            );\n            j += 6;\n            break;\n          case OPS.curveTo2:\n            ctx.bezierCurveTo(\n              x,\n              y,\n              args[j],\n              args[j + 1],\n              args[j + 2],\n              args[j + 3]\n            );\n            x = args[j + 2];\n            y = args[j + 3];\n            j += 4;\n            break;\n          case OPS.curveTo3:\n            x = args[j + 2];\n            y = args[j + 3];\n            ctx.bezierCurveTo(args[j], args[j + 1], x, y, x, y);\n            j += 4;\n            break;\n          case OPS.closePath:\n            ctx.closePath();\n            break;\n        }\n      }\n      current.setCurrentPoint(x, y);\n    },\n    closePath: function CanvasGraphics_closePath() {\n      this.ctx.closePath();\n    },\n    stroke: function CanvasGraphics_stroke(consumePath) {\n      consumePath = typeof consumePath !== \"undefined\" ? consumePath : true;\n      var ctx = this.ctx;\n      var strokeColor = this.current.strokeColor;\n      // For stroke we want to temporarily change the global alpha to the\n      // stroking alpha.\n      ctx.globalAlpha = this.current.strokeAlpha;\n      if (\n        strokeColor &&\n        strokeColor.hasOwnProperty(\"type\") &&\n        strokeColor.type === \"Pattern\"\n      ) {\n        // for patterns, we transform to pattern space, calculate\n        // the pattern, call stroke, and restore to user space\n        ctx.save();\n        // The current transform will be replaced while building the pattern,\n        // but the line width needs to be adjusted by the current transform, so\n        // we must scale it. To properly fix this we should be using a pattern\n        // transform instead (see #10955).\n        const transform = ctx.mozCurrentTransform;\n        const scale = Util.singularValueDecompose2dScale(transform)[0];\n        ctx.strokeStyle = strokeColor.getPattern(ctx, this);\n        ctx.lineWidth = Math.max(\n          this.getSinglePixelWidth() * MIN_WIDTH_FACTOR,\n          this.current.lineWidth * scale\n        );\n        ctx.stroke();\n        ctx.restore();\n      } else {\n        // Prevent drawing too thin lines by enforcing a minimum line width.\n        ctx.lineWidth = Math.max(\n          this.getSinglePixelWidth() * MIN_WIDTH_FACTOR,\n          this.current.lineWidth\n        );\n        ctx.stroke();\n      }\n      if (consumePath) {\n        this.consumePath();\n      }\n      // Restore the global alpha to the fill alpha\n      ctx.globalAlpha = this.current.fillAlpha;\n    },\n    closeStroke: function CanvasGraphics_closeStroke() {\n      this.closePath();\n      this.stroke();\n    },\n    fill: function CanvasGraphics_fill(consumePath) {\n      consumePath = typeof consumePath !== \"undefined\" ? consumePath : true;\n      var ctx = this.ctx;\n      var fillColor = this.current.fillColor;\n      var isPatternFill = this.current.patternFill;\n      var needRestore = false;\n\n      if (isPatternFill) {\n        ctx.save();\n        if (this.baseTransform) {\n          ctx.setTransform.apply(ctx, this.baseTransform);\n        }\n        ctx.fillStyle = fillColor.getPattern(ctx, this);\n        needRestore = true;\n      }\n\n      if (this.pendingEOFill) {\n        ctx.fill(\"evenodd\");\n        this.pendingEOFill = false;\n      } else {\n        ctx.fill();\n      }\n\n      if (needRestore) {\n        ctx.restore();\n      }\n      if (consumePath) {\n        this.consumePath();\n      }\n    },\n    eoFill: function CanvasGraphics_eoFill() {\n      this.pendingEOFill = true;\n      this.fill();\n    },\n    fillStroke: function CanvasGraphics_fillStroke() {\n      this.fill(false);\n      this.stroke(false);\n\n      this.consumePath();\n    },\n    eoFillStroke: function CanvasGraphics_eoFillStroke() {\n      this.pendingEOFill = true;\n      this.fillStroke();\n    },\n    closeFillStroke: function CanvasGraphics_closeFillStroke() {\n      this.closePath();\n      this.fillStroke();\n    },\n    closeEOFillStroke: function CanvasGraphics_closeEOFillStroke() {\n      this.pendingEOFill = true;\n      this.closePath();\n      this.fillStroke();\n    },\n    endPath: function CanvasGraphics_endPath() {\n      this.consumePath();\n    },\n\n    // Clipping\n    clip: function CanvasGraphics_clip() {\n      this.pendingClip = NORMAL_CLIP;\n    },\n    eoClip: function CanvasGraphics_eoClip() {\n      this.pendingClip = EO_CLIP;\n    },\n\n    // Text\n    beginText: function CanvasGraphics_beginText() {\n      this.current.textMatrix = IDENTITY_MATRIX;\n      this.current.textMatrixScale = 1;\n      this.current.x = this.current.lineX = 0;\n      this.current.y = this.current.lineY = 0;\n    },\n    endText: function CanvasGraphics_endText() {\n      var paths = this.pendingTextPaths;\n      var ctx = this.ctx;\n      if (paths === undefined) {\n        ctx.beginPath();\n        return;\n      }\n\n      ctx.save();\n      ctx.beginPath();\n      for (var i = 0; i < paths.length; i++) {\n        var path = paths[i];\n        ctx.setTransform.apply(ctx, path.transform);\n        ctx.translate(path.x, path.y);\n        path.addToPath(ctx, path.fontSize);\n      }\n      ctx.restore();\n      ctx.clip();\n      ctx.beginPath();\n      delete this.pendingTextPaths;\n    },\n    setCharSpacing: function CanvasGraphics_setCharSpacing(spacing) {\n      this.current.charSpacing = spacing;\n    },\n    setWordSpacing: function CanvasGraphics_setWordSpacing(spacing) {\n      this.current.wordSpacing = spacing;\n    },\n    setHScale: function CanvasGraphics_setHScale(scale) {\n      this.current.textHScale = scale / 100;\n    },\n    setLeading: function CanvasGraphics_setLeading(leading) {\n      this.current.leading = -leading;\n    },\n    setFont: function CanvasGraphics_setFont(fontRefName, size) {\n      var fontObj = this.commonObjs.get(fontRefName);\n      var current = this.current;\n\n      if (!fontObj) {\n        throw new Error(`Can't find font for ${fontRefName}`);\n      }\n\n      current.fontMatrix = fontObj.fontMatrix\n        ? fontObj.fontMatrix\n        : FONT_IDENTITY_MATRIX;\n\n      // A valid matrix needs all main diagonal elements to be non-zero\n      // This also ensures we bypass FF bugzilla bug #719844.\n      if (current.fontMatrix[0] === 0 || current.fontMatrix[3] === 0) {\n        warn(\"Invalid font matrix for font \" + fontRefName);\n      }\n\n      // The spec for Tf (setFont) says that 'size' specifies the font 'scale',\n      // and in some docs this can be negative (inverted x-y axes).\n      if (size < 0) {\n        size = -size;\n        current.fontDirection = -1;\n      } else {\n        current.fontDirection = 1;\n      }\n\n      this.current.font = fontObj;\n      this.current.fontSize = size;\n\n      if (fontObj.isType3Font) {\n        return; // we don't need ctx.font for Type3 fonts\n      }\n\n      var name = fontObj.loadedName || \"sans-serif\";\n\n      let bold = \"normal\";\n      if (fontObj.black) {\n        bold = \"900\";\n      } else if (fontObj.bold) {\n        bold = \"bold\";\n      }\n      var italic = fontObj.italic ? \"italic\" : \"normal\";\n      var typeface = `\"${name}\", ${fontObj.fallbackName}`;\n\n      // Some font backends cannot handle fonts below certain size.\n      // Keeping the font at minimal size and using the fontSizeScale to change\n      // the current transformation matrix before the fillText/strokeText.\n      // See https://bugzilla.mozilla.org/show_bug.cgi?id=726227\n      let browserFontSize = size;\n      if (size < MIN_FONT_SIZE) {\n        browserFontSize = MIN_FONT_SIZE;\n      } else if (size > MAX_FONT_SIZE) {\n        browserFontSize = MAX_FONT_SIZE;\n      }\n      this.current.fontSizeScale = size / browserFontSize;\n\n      this.ctx.font = `${italic} ${bold} ${browserFontSize}px ${typeface}`;\n    },\n    setTextRenderingMode: function CanvasGraphics_setTextRenderingMode(mode) {\n      this.current.textRenderingMode = mode;\n    },\n    setTextRise: function CanvasGraphics_setTextRise(rise) {\n      this.current.textRise = rise;\n    },\n    moveText: function CanvasGraphics_moveText(x, y) {\n      this.current.x = this.current.lineX += x;\n      this.current.y = this.current.lineY += y;\n    },\n    setLeadingMoveText: function CanvasGraphics_setLeadingMoveText(x, y) {\n      this.setLeading(-y);\n      this.moveText(x, y);\n    },\n    setTextMatrix: function CanvasGraphics_setTextMatrix(a, b, c, d, e, f) {\n      this.current.textMatrix = [a, b, c, d, e, f];\n      this.current.textMatrixScale = Math.sqrt(a * a + b * b);\n\n      this.current.x = this.current.lineX = 0;\n      this.current.y = this.current.lineY = 0;\n    },\n    nextLine: function CanvasGraphics_nextLine() {\n      this.moveText(0, this.current.leading);\n    },\n\n    paintChar(character, x, y, patternTransform) {\n      var ctx = this.ctx;\n      var current = this.current;\n      var font = current.font;\n      var textRenderingMode = current.textRenderingMode;\n      var fontSize = current.fontSize / current.fontSizeScale;\n      var fillStrokeMode =\n        textRenderingMode & TextRenderingMode.FILL_STROKE_MASK;\n      var isAddToPathSet = !!(\n        textRenderingMode & TextRenderingMode.ADD_TO_PATH_FLAG\n      );\n      const patternFill = current.patternFill && font.data;\n\n      var addToPath;\n      if (font.disableFontFace || isAddToPathSet || patternFill) {\n        addToPath = font.getPathGenerator(this.commonObjs, character);\n      }\n\n      if (font.disableFontFace || patternFill) {\n        ctx.save();\n        ctx.translate(x, y);\n        ctx.beginPath();\n        addToPath(ctx, fontSize);\n        if (patternTransform) {\n          ctx.setTransform.apply(ctx, patternTransform);\n        }\n        if (\n          fillStrokeMode === TextRenderingMode.FILL ||\n          fillStrokeMode === TextRenderingMode.FILL_STROKE\n        ) {\n          ctx.fill();\n        }\n        if (\n          fillStrokeMode === TextRenderingMode.STROKE ||\n          fillStrokeMode === TextRenderingMode.FILL_STROKE\n        ) {\n          ctx.stroke();\n        }\n        ctx.restore();\n      } else {\n        if (\n          fillStrokeMode === TextRenderingMode.FILL ||\n          fillStrokeMode === TextRenderingMode.FILL_STROKE\n        ) {\n          ctx.fillText(character, x, y);\n        }\n        if (\n          fillStrokeMode === TextRenderingMode.STROKE ||\n          fillStrokeMode === TextRenderingMode.FILL_STROKE\n        ) {\n          ctx.strokeText(character, x, y);\n        }\n      }\n\n      if (isAddToPathSet) {\n        var paths = this.pendingTextPaths || (this.pendingTextPaths = []);\n        paths.push({\n          transform: ctx.mozCurrentTransform,\n          x,\n          y,\n          fontSize,\n          addToPath,\n        });\n      }\n    },\n\n    get isFontSubpixelAAEnabled() {\n      // Checks if anti-aliasing is enabled when scaled text is painted.\n      // On Windows GDI scaled fonts looks bad.\n      const { context: ctx } = this.cachedCanvases.getCanvas(\n        \"isFontSubpixelAAEnabled\",\n        10,\n        10\n      );\n      ctx.scale(1.5, 1);\n      ctx.fillText(\"I\", 0, 10);\n      var data = ctx.getImageData(0, 0, 10, 10).data;\n      var enabled = false;\n      for (var i = 3; i < data.length; i += 4) {\n        if (data[i] > 0 && data[i] < 255) {\n          enabled = true;\n          break;\n        }\n      }\n      return shadow(this, \"isFontSubpixelAAEnabled\", enabled);\n    },\n\n    showText: function CanvasGraphics_showText(glyphs) {\n      var current = this.current;\n      var font = current.font;\n      if (font.isType3Font) {\n        return this.showType3Text(glyphs);\n      }\n\n      var fontSize = current.fontSize;\n      if (fontSize === 0) {\n        return undefined;\n      }\n\n      var ctx = this.ctx;\n      var fontSizeScale = current.fontSizeScale;\n      var charSpacing = current.charSpacing;\n      var wordSpacing = current.wordSpacing;\n      var fontDirection = current.fontDirection;\n      var textHScale = current.textHScale * fontDirection;\n      var glyphsLength = glyphs.length;\n      var vertical = font.vertical;\n      var spacingDir = vertical ? 1 : -1;\n      var defaultVMetrics = font.defaultVMetrics;\n      var widthAdvanceScale = fontSize * current.fontMatrix[0];\n\n      var simpleFillText =\n        current.textRenderingMode === TextRenderingMode.FILL &&\n        !font.disableFontFace &&\n        !current.patternFill;\n\n      ctx.save();\n      let patternTransform;\n      if (current.patternFill) {\n        // TODO: Patterns are not applied correctly to text if a non-embedded\n        // font is used. E.g. issue 8111 and ShowText-ShadingPattern.pdf.\n        ctx.save();\n        const pattern = current.fillColor.getPattern(ctx, this);\n        patternTransform = ctx.mozCurrentTransform;\n        ctx.restore();\n        ctx.fillStyle = pattern;\n      }\n      ctx.transform.apply(ctx, current.textMatrix);\n      ctx.translate(current.x, current.y + current.textRise);\n\n      if (fontDirection > 0) {\n        ctx.scale(textHScale, -1);\n      } else {\n        ctx.scale(textHScale, 1);\n      }\n\n      var lineWidth = current.lineWidth;\n      var scale = current.textMatrixScale;\n      if (scale === 0 || lineWidth === 0) {\n        var fillStrokeMode =\n          current.textRenderingMode & TextRenderingMode.FILL_STROKE_MASK;\n        if (\n          fillStrokeMode === TextRenderingMode.STROKE ||\n          fillStrokeMode === TextRenderingMode.FILL_STROKE\n        ) {\n          this._cachedGetSinglePixelWidth = null;\n          lineWidth = this.getSinglePixelWidth() * MIN_WIDTH_FACTOR;\n        }\n      } else {\n        lineWidth /= scale;\n      }\n\n      if (fontSizeScale !== 1.0) {\n        ctx.scale(fontSizeScale, fontSizeScale);\n        lineWidth /= fontSizeScale;\n      }\n\n      ctx.lineWidth = lineWidth;\n\n      var x = 0,\n        i;\n      for (i = 0; i < glyphsLength; ++i) {\n        var glyph = glyphs[i];\n        if (isNum(glyph)) {\n          x += (spacingDir * glyph * fontSize) / 1000;\n          continue;\n        }\n\n        var restoreNeeded = false;\n        var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing;\n        var character = glyph.fontChar;\n        var accent = glyph.accent;\n        var scaledX, scaledY, scaledAccentX, scaledAccentY;\n        var width = glyph.width;\n        if (vertical) {\n          var vmetric, vx, vy;\n          vmetric = glyph.vmetric || defaultVMetrics;\n          vx = glyph.vmetric ? vmetric[1] : width * 0.5;\n          vx = -vx * widthAdvanceScale;\n          vy = vmetric[2] * widthAdvanceScale;\n\n          width = vmetric ? -vmetric[0] : width;\n          scaledX = vx / fontSizeScale;\n          scaledY = (x + vy) / fontSizeScale;\n        } else {\n          scaledX = x / fontSizeScale;\n          scaledY = 0;\n        }\n\n        if (font.remeasure && width > 0) {\n          // Some standard fonts may not have the exact width: rescale per\n          // character if measured width is greater than expected glyph width\n          // and subpixel-aa is enabled, otherwise just center the glyph.\n          var measuredWidth =\n            ((ctx.measureText(character).width * 1000) / fontSize) *\n            fontSizeScale;\n          if (width < measuredWidth && this.isFontSubpixelAAEnabled) {\n            var characterScaleX = width / measuredWidth;\n            restoreNeeded = true;\n            ctx.save();\n            ctx.scale(characterScaleX, 1);\n            scaledX /= characterScaleX;\n          } else if (width !== measuredWidth) {\n            scaledX +=\n              (((width - measuredWidth) / 2000) * fontSize) / fontSizeScale;\n          }\n        }\n\n        // Only attempt to draw the glyph if it is actually in the embedded font\n        // file or if there isn't a font file so the fallback font is shown.\n        if (glyph.isInFont || font.missingFile) {\n          if (simpleFillText && !accent) {\n            // common case\n            ctx.fillText(character, scaledX, scaledY);\n          } else {\n            this.paintChar(character, scaledX, scaledY, patternTransform);\n            if (accent) {\n              scaledAccentX = scaledX + accent.offset.x / fontSizeScale;\n              scaledAccentY = scaledY - accent.offset.y / fontSizeScale;\n              this.paintChar(\n                accent.fontChar,\n                scaledAccentX,\n                scaledAccentY,\n                patternTransform\n              );\n            }\n          }\n        }\n\n        var charWidth;\n        if (vertical) {\n          charWidth = width * widthAdvanceScale - spacing * fontDirection;\n        } else {\n          charWidth = width * widthAdvanceScale + spacing * fontDirection;\n        }\n        x += charWidth;\n\n        if (restoreNeeded) {\n          ctx.restore();\n        }\n      }\n      if (vertical) {\n        current.y -= x;\n      } else {\n        current.x += x * textHScale;\n      }\n      ctx.restore();\n    },\n\n    showType3Text: function CanvasGraphics_showType3Text(glyphs) {\n      // Type3 fonts - each glyph is a \"mini-PDF\"\n      var ctx = this.ctx;\n      var current = this.current;\n      var font = current.font;\n      var fontSize = current.fontSize;\n      var fontDirection = current.fontDirection;\n      var spacingDir = font.vertical ? 1 : -1;\n      var charSpacing = current.charSpacing;\n      var wordSpacing = current.wordSpacing;\n      var textHScale = current.textHScale * fontDirection;\n      var fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX;\n      var glyphsLength = glyphs.length;\n      var isTextInvisible =\n        current.textRenderingMode === TextRenderingMode.INVISIBLE;\n      var i, glyph, width, spacingLength;\n\n      if (isTextInvisible || fontSize === 0) {\n        return;\n      }\n      this._cachedGetSinglePixelWidth = null;\n\n      ctx.save();\n      ctx.transform.apply(ctx, current.textMatrix);\n      ctx.translate(current.x, current.y);\n\n      ctx.scale(textHScale, fontDirection);\n\n      for (i = 0; i < glyphsLength; ++i) {\n        glyph = glyphs[i];\n        if (isNum(glyph)) {\n          spacingLength = (spacingDir * glyph * fontSize) / 1000;\n          this.ctx.translate(spacingLength, 0);\n          current.x += spacingLength * textHScale;\n          continue;\n        }\n\n        var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing;\n        var operatorList = font.charProcOperatorList[glyph.operatorListId];\n        if (!operatorList) {\n          warn(`Type3 character \"${glyph.operatorListId}\" is not available.`);\n          continue;\n        }\n        this.processingType3 = glyph;\n        this.save();\n        ctx.scale(fontSize, fontSize);\n        ctx.transform.apply(ctx, fontMatrix);\n        this.executeOperatorList(operatorList);\n        this.restore();\n\n        var transformed = Util.applyTransform([glyph.width, 0], fontMatrix);\n        width = transformed[0] * fontSize + spacing;\n\n        ctx.translate(width, 0);\n        current.x += width * textHScale;\n      }\n      ctx.restore();\n      this.processingType3 = null;\n    },\n\n    // Type3 fonts\n    setCharWidth: function CanvasGraphics_setCharWidth(xWidth, yWidth) {\n      // We can safely ignore this since the width should be the same\n      // as the width in the Widths array.\n    },\n    setCharWidthAndBounds: function CanvasGraphics_setCharWidthAndBounds(\n      xWidth,\n      yWidth,\n      llx,\n      lly,\n      urx,\n      ury\n    ) {\n      // TODO According to the spec we're also suppose to ignore any operators\n      // that set color or include images while processing this type3 font.\n      this.ctx.rect(llx, lly, urx - llx, ury - lly);\n      this.clip();\n      this.endPath();\n    },\n\n    // Color\n    getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR) {\n      var pattern;\n      if (IR[0] === \"TilingPattern\") {\n        var color = IR[1];\n        var baseTransform =\n          this.baseTransform || this.ctx.mozCurrentTransform.slice();\n        var canvasGraphicsFactory = {\n          createCanvasGraphics: ctx => {\n            return new CanvasGraphics(\n              ctx,\n              this.commonObjs,\n              this.objs,\n              this.canvasFactory,\n              this.webGLContext\n            );\n          },\n        };\n        pattern = new TilingPattern(\n          IR,\n          color,\n          this.ctx,\n          canvasGraphicsFactory,\n          baseTransform\n        );\n      } else {\n        pattern = getShadingPatternFromIR(IR);\n      }\n      return pattern;\n    },\n    setStrokeColorN: function CanvasGraphics_setStrokeColorN() {\n      this.current.strokeColor = this.getColorN_Pattern(arguments);\n    },\n    setFillColorN: function CanvasGraphics_setFillColorN() {\n      this.current.fillColor = this.getColorN_Pattern(arguments);\n      this.current.patternFill = true;\n    },\n    setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) {\n      var color = Util.makeCssRgb(r, g, b);\n      this.ctx.strokeStyle = color;\n      this.current.strokeColor = color;\n    },\n    setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) {\n      var color = Util.makeCssRgb(r, g, b);\n      this.ctx.fillStyle = color;\n      this.current.fillColor = color;\n      this.current.patternFill = false;\n    },\n\n    shadingFill: function CanvasGraphics_shadingFill(patternIR) {\n      var ctx = this.ctx;\n\n      this.save();\n      var pattern = getShadingPatternFromIR(patternIR);\n      ctx.fillStyle = pattern.getPattern(ctx, this, true);\n\n      var inv = ctx.mozCurrentTransformInverse;\n      if (inv) {\n        var canvas = ctx.canvas;\n        var width = canvas.width;\n        var height = canvas.height;\n\n        var bl = Util.applyTransform([0, 0], inv);\n        var br = Util.applyTransform([0, height], inv);\n        var ul = Util.applyTransform([width, 0], inv);\n        var ur = Util.applyTransform([width, height], inv);\n\n        var x0 = Math.min(bl[0], br[0], ul[0], ur[0]);\n        var y0 = Math.min(bl[1], br[1], ul[1], ur[1]);\n        var x1 = Math.max(bl[0], br[0], ul[0], ur[0]);\n        var y1 = Math.max(bl[1], br[1], ul[1], ur[1]);\n\n        this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0);\n      } else {\n        // HACK to draw the gradient onto an infinite rectangle.\n        // PDF gradients are drawn across the entire image while\n        // Canvas only allows gradients to be drawn in a rectangle\n        // The following bug should allow us to remove this.\n        // https://bugzilla.mozilla.org/show_bug.cgi?id=664884\n\n        this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10);\n      }\n\n      this.restore();\n    },\n\n    // Images\n    beginInlineImage: function CanvasGraphics_beginInlineImage() {\n      unreachable(\"Should not call beginInlineImage\");\n    },\n    beginImageData: function CanvasGraphics_beginImageData() {\n      unreachable(\"Should not call beginImageData\");\n    },\n\n    paintFormXObjectBegin: function CanvasGraphics_paintFormXObjectBegin(\n      matrix,\n      bbox\n    ) {\n      this.save();\n      this.baseTransformStack.push(this.baseTransform);\n\n      if (Array.isArray(matrix) && matrix.length === 6) {\n        this.transform.apply(this, matrix);\n      }\n\n      this.baseTransform = this.ctx.mozCurrentTransform;\n\n      if (bbox) {\n        var width = bbox[2] - bbox[0];\n        var height = bbox[3] - bbox[1];\n        this.ctx.rect(bbox[0], bbox[1], width, height);\n        this.clip();\n        this.endPath();\n      }\n    },\n\n    paintFormXObjectEnd: function CanvasGraphics_paintFormXObjectEnd() {\n      this.restore();\n      this.baseTransform = this.baseTransformStack.pop();\n    },\n\n    beginGroup: function CanvasGraphics_beginGroup(group) {\n      this.save();\n      var currentCtx = this.ctx;\n      // TODO non-isolated groups - according to Rik at adobe non-isolated\n      // group results aren't usually that different and they even have tools\n      // that ignore this setting. Notes from Rik on implementing:\n      // - When you encounter an transparency group, create a new canvas with\n      // the dimensions of the bbox\n      // - copy the content from the previous canvas to the new canvas\n      // - draw as usual\n      // - remove the backdrop alpha:\n      // alphaNew = 1 - (1 - alpha)/(1 - alphaBackdrop) with 'alpha' the alpha\n      // value of your transparency group and 'alphaBackdrop' the alpha of the\n      // backdrop\n      // - remove background color:\n      // colorNew = color - alphaNew *colorBackdrop /(1 - alphaNew)\n      if (!group.isolated) {\n        info(\"TODO: Support non-isolated groups.\");\n      }\n\n      // TODO knockout - supposedly possible with the clever use of compositing\n      // modes.\n      if (group.knockout) {\n        warn(\"Knockout groups not supported.\");\n      }\n\n      var currentTransform = currentCtx.mozCurrentTransform;\n      if (group.matrix) {\n        currentCtx.transform.apply(currentCtx, group.matrix);\n      }\n      if (!group.bbox) {\n        throw new Error(\"Bounding box is required.\");\n      }\n\n      // Based on the current transform figure out how big the bounding box\n      // will actually be.\n      var bounds = Util.getAxialAlignedBoundingBox(\n        group.bbox,\n        currentCtx.mozCurrentTransform\n      );\n      // Clip the bounding box to the current canvas.\n      var canvasBounds = [\n        0,\n        0,\n        currentCtx.canvas.width,\n        currentCtx.canvas.height,\n      ];\n      bounds = Util.intersect(bounds, canvasBounds) || [0, 0, 0, 0];\n      // Use ceil in case we're between sizes so we don't create canvas that is\n      // too small and make the canvas at least 1x1 pixels.\n      var offsetX = Math.floor(bounds[0]);\n      var offsetY = Math.floor(bounds[1]);\n      var drawnWidth = Math.max(Math.ceil(bounds[2]) - offsetX, 1);\n      var drawnHeight = Math.max(Math.ceil(bounds[3]) - offsetY, 1);\n      var scaleX = 1,\n        scaleY = 1;\n      if (drawnWidth > MAX_GROUP_SIZE) {\n        scaleX = drawnWidth / MAX_GROUP_SIZE;\n        drawnWidth = MAX_GROUP_SIZE;\n      }\n      if (drawnHeight > MAX_GROUP_SIZE) {\n        scaleY = drawnHeight / MAX_GROUP_SIZE;\n        drawnHeight = MAX_GROUP_SIZE;\n      }\n\n      var cacheId = \"groupAt\" + this.groupLevel;\n      if (group.smask) {\n        // Using two cache entries is case if masks are used one after another.\n        cacheId += \"_smask_\" + (this.smaskCounter++ % 2);\n      }\n      var scratchCanvas = this.cachedCanvases.getCanvas(\n        cacheId,\n        drawnWidth,\n        drawnHeight,\n        true\n      );\n      var groupCtx = scratchCanvas.context;\n\n      // Since we created a new canvas that is just the size of the bounding box\n      // we have to translate the group ctx.\n      groupCtx.scale(1 / scaleX, 1 / scaleY);\n      groupCtx.translate(-offsetX, -offsetY);\n      groupCtx.transform.apply(groupCtx, currentTransform);\n\n      if (group.smask) {\n        // Saving state and cached mask to be used in setGState.\n        this.smaskStack.push({\n          canvas: scratchCanvas.canvas,\n          context: groupCtx,\n          offsetX,\n          offsetY,\n          scaleX,\n          scaleY,\n          subtype: group.smask.subtype,\n          backdrop: group.smask.backdrop,\n          transferMap: group.smask.transferMap || null,\n          startTransformInverse: null, // used during suspend operation\n        });\n      } else {\n        // Setup the current ctx so when the group is popped we draw it at the\n        // right location.\n        currentCtx.setTransform(1, 0, 0, 1, 0, 0);\n        currentCtx.translate(offsetX, offsetY);\n        currentCtx.scale(scaleX, scaleY);\n      }\n      // The transparency group inherits all off the current graphics state\n      // except the blend mode, soft mask, and alpha constants.\n      copyCtxState(currentCtx, groupCtx);\n      this.ctx = groupCtx;\n      this.setGState([\n        [\"BM\", \"source-over\"],\n        [\"ca\", 1],\n        [\"CA\", 1],\n      ]);\n      this.groupStack.push(currentCtx);\n      this.groupLevel++;\n\n      // Reseting mask state, masks will be applied on restore of the group.\n      this.current.activeSMask = null;\n    },\n\n    endGroup: function CanvasGraphics_endGroup(group) {\n      this.groupLevel--;\n      var groupCtx = this.ctx;\n      this.ctx = this.groupStack.pop();\n      // Turn off image smoothing to avoid sub pixel interpolation which can\n      // look kind of blurry for some pdfs.\n      if (this.ctx.imageSmoothingEnabled !== undefined) {\n        this.ctx.imageSmoothingEnabled = false;\n      } else {\n        this.ctx.mozImageSmoothingEnabled = false;\n      }\n      if (group.smask) {\n        this.tempSMask = this.smaskStack.pop();\n      } else {\n        this.ctx.drawImage(groupCtx.canvas, 0, 0);\n      }\n      this.restore();\n    },\n\n    beginAnnotations: function CanvasGraphics_beginAnnotations() {\n      this.save();\n      if (this.baseTransform) {\n        this.ctx.setTransform.apply(this.ctx, this.baseTransform);\n      }\n    },\n\n    endAnnotations: function CanvasGraphics_endAnnotations() {\n      this.restore();\n    },\n\n    beginAnnotation: function CanvasGraphics_beginAnnotation(\n      rect,\n      transform,\n      matrix\n    ) {\n      this.save();\n      resetCtxToDefault(this.ctx);\n      this.current = new CanvasExtraState();\n\n      if (Array.isArray(rect) && rect.length === 4) {\n        var width = rect[2] - rect[0];\n        var height = rect[3] - rect[1];\n        this.ctx.rect(rect[0], rect[1], width, height);\n        this.clip();\n        this.endPath();\n      }\n\n      this.transform.apply(this, transform);\n      this.transform.apply(this, matrix);\n    },\n\n    endAnnotation: function CanvasGraphics_endAnnotation() {\n      this.restore();\n    },\n\n    paintJpegXObject: function CanvasGraphics_paintJpegXObject(objId, w, h) {\n      const domImage = this.processingType3\n        ? this.commonObjs.get(objId)\n        : this.objs.get(objId);\n      if (!domImage) {\n        warn(\"Dependent image isn't ready yet\");\n        return;\n      }\n\n      this.save();\n\n      var ctx = this.ctx;\n      // scale the image to the unit square\n      ctx.scale(1 / w, -1 / h);\n\n      ctx.drawImage(\n        domImage,\n        0,\n        0,\n        domImage.width,\n        domImage.height,\n        0,\n        -h,\n        w,\n        h\n      );\n      if (this.imageLayer) {\n        var currentTransform = ctx.mozCurrentTransformInverse;\n        var position = this.getCanvasPosition(0, 0);\n        this.imageLayer.appendImage({\n          objId,\n          left: position[0],\n          top: position[1],\n          width: w / currentTransform[0],\n          height: h / currentTransform[3],\n        });\n      }\n      this.restore();\n    },\n\n    paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) {\n      var ctx = this.ctx;\n      var width = img.width,\n        height = img.height;\n      var fillColor = this.current.fillColor;\n      var isPatternFill = this.current.patternFill;\n\n      var glyph = this.processingType3;\n\n      if (COMPILE_TYPE3_GLYPHS && glyph && glyph.compiled === undefined) {\n        if (width <= MAX_SIZE_TO_COMPILE && height <= MAX_SIZE_TO_COMPILE) {\n          glyph.compiled = compileType3Glyph({ data: img.data, width, height });\n        } else {\n          glyph.compiled = null;\n        }\n      }\n\n      if (glyph && glyph.compiled) {\n        glyph.compiled(ctx);\n        return;\n      }\n\n      var maskCanvas = this.cachedCanvases.getCanvas(\n        \"maskCanvas\",\n        width,\n        height\n      );\n      var maskCtx = maskCanvas.context;\n      maskCtx.save();\n\n      putBinaryImageMask(maskCtx, img);\n\n      maskCtx.globalCompositeOperation = \"source-in\";\n\n      maskCtx.fillStyle = isPatternFill\n        ? fillColor.getPattern(maskCtx, this)\n        : fillColor;\n      maskCtx.fillRect(0, 0, width, height);\n\n      maskCtx.restore();\n\n      this.paintInlineImageXObject(maskCanvas.canvas);\n    },\n\n    paintImageMaskXObjectRepeat: function CanvasGraphics_paintImageMaskXObjectRepeat(\n      imgData,\n      scaleX,\n      scaleY,\n      positions\n    ) {\n      var width = imgData.width;\n      var height = imgData.height;\n      var fillColor = this.current.fillColor;\n      var isPatternFill = this.current.patternFill;\n\n      var maskCanvas = this.cachedCanvases.getCanvas(\n        \"maskCanvas\",\n        width,\n        height\n      );\n      var maskCtx = maskCanvas.context;\n      maskCtx.save();\n\n      putBinaryImageMask(maskCtx, imgData);\n\n      maskCtx.globalCompositeOperation = \"source-in\";\n\n      maskCtx.fillStyle = isPatternFill\n        ? fillColor.getPattern(maskCtx, this)\n        : fillColor;\n      maskCtx.fillRect(0, 0, width, height);\n\n      maskCtx.restore();\n\n      var ctx = this.ctx;\n      for (var i = 0, ii = positions.length; i < ii; i += 2) {\n        ctx.save();\n        ctx.transform(scaleX, 0, 0, scaleY, positions[i], positions[i + 1]);\n        ctx.scale(1, -1);\n        ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, 0, -1, 1, 1);\n        ctx.restore();\n      }\n    },\n\n    paintImageMaskXObjectGroup: function CanvasGraphics_paintImageMaskXObjectGroup(\n      images\n    ) {\n      var ctx = this.ctx;\n\n      var fillColor = this.current.fillColor;\n      var isPatternFill = this.current.patternFill;\n      for (var i = 0, ii = images.length; i < ii; i++) {\n        var image = images[i];\n        var width = image.width,\n          height = image.height;\n\n        var maskCanvas = this.cachedCanvases.getCanvas(\n          \"maskCanvas\",\n          width,\n          height\n        );\n        var maskCtx = maskCanvas.context;\n        maskCtx.save();\n\n        putBinaryImageMask(maskCtx, image);\n\n        maskCtx.globalCompositeOperation = \"source-in\";\n\n        maskCtx.fillStyle = isPatternFill\n          ? fillColor.getPattern(maskCtx, this)\n          : fillColor;\n        maskCtx.fillRect(0, 0, width, height);\n\n        maskCtx.restore();\n\n        ctx.save();\n        ctx.transform.apply(ctx, image.transform);\n        ctx.scale(1, -1);\n        ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, 0, -1, 1, 1);\n        ctx.restore();\n      }\n    },\n\n    paintImageXObject: function CanvasGraphics_paintImageXObject(objId) {\n      const imgData = this.processingType3\n        ? this.commonObjs.get(objId)\n        : this.objs.get(objId);\n      if (!imgData) {\n        warn(\"Dependent image isn't ready yet\");\n        return;\n      }\n\n      this.paintInlineImageXObject(imgData);\n    },\n\n    paintImageXObjectRepeat: function CanvasGraphics_paintImageXObjectRepeat(\n      objId,\n      scaleX,\n      scaleY,\n      positions\n    ) {\n      const imgData = this.processingType3\n        ? this.commonObjs.get(objId)\n        : this.objs.get(objId);\n      if (!imgData) {\n        warn(\"Dependent image isn't ready yet\");\n        return;\n      }\n\n      var width = imgData.width;\n      var height = imgData.height;\n      var map = [];\n      for (var i = 0, ii = positions.length; i < ii; i += 2) {\n        map.push({\n          transform: [scaleX, 0, 0, scaleY, positions[i], positions[i + 1]],\n          x: 0,\n          y: 0,\n          w: width,\n          h: height,\n        });\n      }\n      this.paintInlineImageXObjectGroup(imgData, map);\n    },\n\n    paintInlineImageXObject: function CanvasGraphics_paintInlineImageXObject(\n      imgData\n    ) {\n      var width = imgData.width;\n      var height = imgData.height;\n      var ctx = this.ctx;\n\n      this.save();\n      // scale the image to the unit square\n      ctx.scale(1 / width, -1 / height);\n\n      var currentTransform = ctx.mozCurrentTransformInverse;\n      var a = currentTransform[0],\n        b = currentTransform[1];\n      var widthScale = Math.max(Math.sqrt(a * a + b * b), 1);\n      var c = currentTransform[2],\n        d = currentTransform[3];\n      var heightScale = Math.max(Math.sqrt(c * c + d * d), 1);\n\n      var imgToPaint, tmpCanvas;\n      // typeof check is needed due to node.js support, see issue #8489\n      if (\n        (typeof HTMLElement === \"function\" && imgData instanceof HTMLElement) ||\n        !imgData.data\n      ) {\n        imgToPaint = imgData;\n      } else {\n        tmpCanvas = this.cachedCanvases.getCanvas(\"inlineImage\", width, height);\n        var tmpCtx = tmpCanvas.context;\n        putBinaryImageData(tmpCtx, imgData);\n        imgToPaint = tmpCanvas.canvas;\n      }\n\n      var paintWidth = width,\n        paintHeight = height;\n      var tmpCanvasId = \"prescale1\";\n      // Vertial or horizontal scaling shall not be more than 2 to not loose the\n      // pixels during drawImage operation, painting on the temporary canvas(es)\n      // that are twice smaller in size\n      while (\n        (widthScale > 2 && paintWidth > 1) ||\n        (heightScale > 2 && paintHeight > 1)\n      ) {\n        var newWidth = paintWidth,\n          newHeight = paintHeight;\n        if (widthScale > 2 && paintWidth > 1) {\n          newWidth = Math.ceil(paintWidth / 2);\n          widthScale /= paintWidth / newWidth;\n        }\n        if (heightScale > 2 && paintHeight > 1) {\n          newHeight = Math.ceil(paintHeight / 2);\n          heightScale /= paintHeight / newHeight;\n        }\n        tmpCanvas = this.cachedCanvases.getCanvas(\n          tmpCanvasId,\n          newWidth,\n          newHeight\n        );\n        tmpCtx = tmpCanvas.context;\n        tmpCtx.clearRect(0, 0, newWidth, newHeight);\n        tmpCtx.drawImage(\n          imgToPaint,\n          0,\n          0,\n          paintWidth,\n          paintHeight,\n          0,\n          0,\n          newWidth,\n          newHeight\n        );\n        imgToPaint = tmpCanvas.canvas;\n        paintWidth = newWidth;\n        paintHeight = newHeight;\n        tmpCanvasId = tmpCanvasId === \"prescale1\" ? \"prescale2\" : \"prescale1\";\n      }\n      ctx.drawImage(\n        imgToPaint,\n        0,\n        0,\n        paintWidth,\n        paintHeight,\n        0,\n        -height,\n        width,\n        height\n      );\n\n      if (this.imageLayer) {\n        var position = this.getCanvasPosition(0, -height);\n        this.imageLayer.appendImage({\n          imgData,\n          left: position[0],\n          top: position[1],\n          width: width / currentTransform[0],\n          height: height / currentTransform[3],\n        });\n      }\n      this.restore();\n    },\n\n    paintInlineImageXObjectGroup: function CanvasGraphics_paintInlineImageXObjectGroup(\n      imgData,\n      map\n    ) {\n      var ctx = this.ctx;\n      var w = imgData.width;\n      var h = imgData.height;\n\n      var tmpCanvas = this.cachedCanvases.getCanvas(\"inlineImage\", w, h);\n      var tmpCtx = tmpCanvas.context;\n      putBinaryImageData(tmpCtx, imgData);\n\n      for (var i = 0, ii = map.length; i < ii; i++) {\n        var entry = map[i];\n        ctx.save();\n        ctx.transform.apply(ctx, entry.transform);\n        ctx.scale(1, -1);\n        ctx.drawImage(\n          tmpCanvas.canvas,\n          entry.x,\n          entry.y,\n          entry.w,\n          entry.h,\n          0,\n          -1,\n          1,\n          1\n        );\n        if (this.imageLayer) {\n          var position = this.getCanvasPosition(entry.x, entry.y);\n          this.imageLayer.appendImage({\n            imgData,\n            left: position[0],\n            top: position[1],\n            width: w,\n            height: h,\n          });\n        }\n        ctx.restore();\n      }\n    },\n\n    paintSolidColorImageMask: function CanvasGraphics_paintSolidColorImageMask() {\n      this.ctx.fillRect(0, 0, 1, 1);\n    },\n\n    paintXObject: function CanvasGraphics_paintXObject() {\n      warn(\"Unsupported 'paintXObject' command.\");\n    },\n\n    // Marked content\n\n    markPoint: function CanvasGraphics_markPoint(tag) {\n      // TODO Marked content.\n    },\n    markPointProps: function CanvasGraphics_markPointProps(tag, properties) {\n      // TODO Marked content.\n    },\n    beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) {\n      // TODO Marked content.\n    },\n    beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps(\n      tag,\n      properties\n    ) {\n      // TODO Marked content.\n    },\n    endMarkedContent: function CanvasGraphics_endMarkedContent() {\n      // TODO Marked content.\n    },\n\n    // Compatibility\n\n    beginCompat: function CanvasGraphics_beginCompat() {\n      // TODO ignore undefined operators (should we do that anyway?)\n    },\n    endCompat: function CanvasGraphics_endCompat() {\n      // TODO stop ignoring undefined operators\n    },\n\n    // Helper functions\n\n    consumePath: function CanvasGraphics_consumePath() {\n      var ctx = this.ctx;\n      if (this.pendingClip) {\n        if (this.pendingClip === EO_CLIP) {\n          ctx.clip(\"evenodd\");\n        } else {\n          ctx.clip();\n        }\n        this.pendingClip = null;\n      }\n      ctx.beginPath();\n    },\n    getSinglePixelWidth(scale) {\n      if (this._cachedGetSinglePixelWidth === null) {\n        const inverse = this.ctx.mozCurrentTransformInverse;\n        // max of the current horizontal and vertical scale\n        this._cachedGetSinglePixelWidth = Math.sqrt(\n          Math.max(\n            inverse[0] * inverse[0] + inverse[1] * inverse[1],\n            inverse[2] * inverse[2] + inverse[3] * inverse[3]\n          )\n        );\n      }\n      return this._cachedGetSinglePixelWidth;\n    },\n    getCanvasPosition: function CanvasGraphics_getCanvasPosition(x, y) {\n      var transform = this.ctx.mozCurrentTransform;\n      return [\n        transform[0] * x + transform[2] * y + transform[4],\n        transform[1] * x + transform[3] * y + transform[5],\n      ];\n    },\n  };\n\n  for (var op in OPS) {\n    CanvasGraphics.prototype[OPS[op]] = CanvasGraphics.prototype[op];\n  }\n\n  return CanvasGraphics;\n})();\n\nexport { CanvasGraphics };\n","/* Copyright 2014 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FormatError, info, Util } from \"../shared/util.js\";\n\nvar ShadingIRs = {};\n\nfunction applyBoundingBox(ctx, bbox) {\n  if (!bbox || typeof Path2D === \"undefined\") {\n    return;\n  }\n  const width = bbox[2] - bbox[0];\n  const height = bbox[3] - bbox[1];\n  const region = new Path2D();\n  region.rect(bbox[0], bbox[1], width, height);\n  ctx.clip(region);\n}\n\nShadingIRs.RadialAxial = {\n  fromIR: function RadialAxial_fromIR(raw) {\n    var type = raw[1];\n    var bbox = raw[2];\n    var colorStops = raw[3];\n    var p0 = raw[4];\n    var p1 = raw[5];\n    var r0 = raw[6];\n    var r1 = raw[7];\n    return {\n      type: \"Pattern\",\n      getPattern: function RadialAxial_getPattern(ctx) {\n        applyBoundingBox(ctx, bbox);\n        var grad;\n        if (type === \"axial\") {\n          grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]);\n        } else if (type === \"radial\") {\n          grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1);\n        }\n\n        for (var i = 0, ii = colorStops.length; i < ii; ++i) {\n          var c = colorStops[i];\n          grad.addColorStop(c[0], c[1]);\n        }\n        return grad;\n      },\n    };\n  },\n};\n\nvar createMeshCanvas = (function createMeshCanvasClosure() {\n  function drawTriangle(data, context, p1, p2, p3, c1, c2, c3) {\n    // Very basic Gouraud-shaded triangle rasterization algorithm.\n    var coords = context.coords,\n      colors = context.colors;\n    var bytes = data.data,\n      rowSize = data.width * 4;\n    var tmp;\n    if (coords[p1 + 1] > coords[p2 + 1]) {\n      tmp = p1;\n      p1 = p2;\n      p2 = tmp;\n      tmp = c1;\n      c1 = c2;\n      c2 = tmp;\n    }\n    if (coords[p2 + 1] > coords[p3 + 1]) {\n      tmp = p2;\n      p2 = p3;\n      p3 = tmp;\n      tmp = c2;\n      c2 = c3;\n      c3 = tmp;\n    }\n    if (coords[p1 + 1] > coords[p2 + 1]) {\n      tmp = p1;\n      p1 = p2;\n      p2 = tmp;\n      tmp = c1;\n      c1 = c2;\n      c2 = tmp;\n    }\n    var x1 = (coords[p1] + context.offsetX) * context.scaleX;\n    var y1 = (coords[p1 + 1] + context.offsetY) * context.scaleY;\n    var x2 = (coords[p2] + context.offsetX) * context.scaleX;\n    var y2 = (coords[p2 + 1] + context.offsetY) * context.scaleY;\n    var x3 = (coords[p3] + context.offsetX) * context.scaleX;\n    var y3 = (coords[p3 + 1] + context.offsetY) * context.scaleY;\n    if (y1 >= y3) {\n      return;\n    }\n    var c1r = colors[c1],\n      c1g = colors[c1 + 1],\n      c1b = colors[c1 + 2];\n    var c2r = colors[c2],\n      c2g = colors[c2 + 1],\n      c2b = colors[c2 + 2];\n    var c3r = colors[c3],\n      c3g = colors[c3 + 1],\n      c3b = colors[c3 + 2];\n\n    var minY = Math.round(y1),\n      maxY = Math.round(y3);\n    var xa, car, cag, cab;\n    var xb, cbr, cbg, cbb;\n    for (var y = minY; y <= maxY; y++) {\n      if (y < y2) {\n        let k;\n        if (y < y1) {\n          k = 0;\n        } else if (y1 === y2) {\n          k = 1;\n        } else {\n          k = (y1 - y) / (y1 - y2);\n        }\n        xa = x1 - (x1 - x2) * k;\n        car = c1r - (c1r - c2r) * k;\n        cag = c1g - (c1g - c2g) * k;\n        cab = c1b - (c1b - c2b) * k;\n      } else {\n        let k;\n        if (y > y3) {\n          k = 1;\n        } else if (y2 === y3) {\n          k = 0;\n        } else {\n          k = (y2 - y) / (y2 - y3);\n        }\n        xa = x2 - (x2 - x3) * k;\n        car = c2r - (c2r - c3r) * k;\n        cag = c2g - (c2g - c3g) * k;\n        cab = c2b - (c2b - c3b) * k;\n      }\n\n      let k;\n      if (y < y1) {\n        k = 0;\n      } else if (y > y3) {\n        k = 1;\n      } else {\n        k = (y1 - y) / (y1 - y3);\n      }\n      xb = x1 - (x1 - x3) * k;\n      cbr = c1r - (c1r - c3r) * k;\n      cbg = c1g - (c1g - c3g) * k;\n      cbb = c1b - (c1b - c3b) * k;\n      var x1_ = Math.round(Math.min(xa, xb));\n      var x2_ = Math.round(Math.max(xa, xb));\n      var j = rowSize * y + x1_ * 4;\n      for (var x = x1_; x <= x2_; x++) {\n        let k = (xa - x) / (xa - xb);\n        if (k < 0) {\n          k = 0;\n        } else if (k > 1) {\n          k = 1;\n        }\n        bytes[j++] = (car - (car - cbr) * k) | 0;\n        bytes[j++] = (cag - (cag - cbg) * k) | 0;\n        bytes[j++] = (cab - (cab - cbb) * k) | 0;\n        bytes[j++] = 255;\n      }\n    }\n  }\n\n  function drawFigure(data, figure, context) {\n    var ps = figure.coords;\n    var cs = figure.colors;\n    var i, ii;\n    switch (figure.type) {\n      case \"lattice\":\n        var verticesPerRow = figure.verticesPerRow;\n        var rows = Math.floor(ps.length / verticesPerRow) - 1;\n        var cols = verticesPerRow - 1;\n        for (i = 0; i < rows; i++) {\n          var q = i * verticesPerRow;\n          for (var j = 0; j < cols; j++, q++) {\n            drawTriangle(\n              data,\n              context,\n              ps[q],\n              ps[q + 1],\n              ps[q + verticesPerRow],\n              cs[q],\n              cs[q + 1],\n              cs[q + verticesPerRow]\n            );\n            drawTriangle(\n              data,\n              context,\n              ps[q + verticesPerRow + 1],\n              ps[q + 1],\n              ps[q + verticesPerRow],\n              cs[q + verticesPerRow + 1],\n              cs[q + 1],\n              cs[q + verticesPerRow]\n            );\n          }\n        }\n        break;\n      case \"triangles\":\n        for (i = 0, ii = ps.length; i < ii; i += 3) {\n          drawTriangle(\n            data,\n            context,\n            ps[i],\n            ps[i + 1],\n            ps[i + 2],\n            cs[i],\n            cs[i + 1],\n            cs[i + 2]\n          );\n        }\n        break;\n      default:\n        throw new Error(\"illegal figure\");\n    }\n  }\n\n  function createMeshCanvas(\n    bounds,\n    combinesScale,\n    coords,\n    colors,\n    figures,\n    backgroundColor,\n    cachedCanvases,\n    webGLContext\n  ) {\n    // we will increase scale on some weird factor to let antialiasing take\n    // care of \"rough\" edges\n    var EXPECTED_SCALE = 1.1;\n    // MAX_PATTERN_SIZE is used to avoid OOM situation.\n    var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough\n    // We need to keep transparent border around our pattern for fill():\n    // createPattern with 'no-repeat' will bleed edges across entire area.\n    var BORDER_SIZE = 2;\n\n    var offsetX = Math.floor(bounds[0]);\n    var offsetY = Math.floor(bounds[1]);\n    var boundsWidth = Math.ceil(bounds[2]) - offsetX;\n    var boundsHeight = Math.ceil(bounds[3]) - offsetY;\n\n    var width = Math.min(\n      Math.ceil(Math.abs(boundsWidth * combinesScale[0] * EXPECTED_SCALE)),\n      MAX_PATTERN_SIZE\n    );\n    var height = Math.min(\n      Math.ceil(Math.abs(boundsHeight * combinesScale[1] * EXPECTED_SCALE)),\n      MAX_PATTERN_SIZE\n    );\n    var scaleX = boundsWidth / width;\n    var scaleY = boundsHeight / height;\n\n    var context = {\n      coords,\n      colors,\n      offsetX: -offsetX,\n      offsetY: -offsetY,\n      scaleX: 1 / scaleX,\n      scaleY: 1 / scaleY,\n    };\n\n    var paddedWidth = width + BORDER_SIZE * 2;\n    var paddedHeight = height + BORDER_SIZE * 2;\n\n    var canvas, tmpCanvas, i, ii;\n    if (webGLContext.isEnabled) {\n      canvas = webGLContext.drawFigures({\n        width,\n        height,\n        backgroundColor,\n        figures,\n        context,\n      });\n      // https://bugzilla.mozilla.org/show_bug.cgi?id=972126\n      tmpCanvas = cachedCanvases.getCanvas(\n        \"mesh\",\n        paddedWidth,\n        paddedHeight,\n        false\n      );\n      tmpCanvas.context.drawImage(canvas, BORDER_SIZE, BORDER_SIZE);\n      canvas = tmpCanvas.canvas;\n    } else {\n      tmpCanvas = cachedCanvases.getCanvas(\n        \"mesh\",\n        paddedWidth,\n        paddedHeight,\n        false\n      );\n      var tmpCtx = tmpCanvas.context;\n\n      var data = tmpCtx.createImageData(width, height);\n      if (backgroundColor) {\n        var bytes = data.data;\n        for (i = 0, ii = bytes.length; i < ii; i += 4) {\n          bytes[i] = backgroundColor[0];\n          bytes[i + 1] = backgroundColor[1];\n          bytes[i + 2] = backgroundColor[2];\n          bytes[i + 3] = 255;\n        }\n      }\n      for (i = 0; i < figures.length; i++) {\n        drawFigure(data, figures[i], context);\n      }\n      tmpCtx.putImageData(data, BORDER_SIZE, BORDER_SIZE);\n      canvas = tmpCanvas.canvas;\n    }\n\n    return {\n      canvas,\n      offsetX: offsetX - BORDER_SIZE * scaleX,\n      offsetY: offsetY - BORDER_SIZE * scaleY,\n      scaleX,\n      scaleY,\n    };\n  }\n  return createMeshCanvas;\n})();\n\nShadingIRs.Mesh = {\n  fromIR: function Mesh_fromIR(raw) {\n    // var type = raw[1];\n    var coords = raw[2];\n    var colors = raw[3];\n    var figures = raw[4];\n    var bounds = raw[5];\n    var matrix = raw[6];\n    var bbox = raw[7];\n    var background = raw[8];\n    return {\n      type: \"Pattern\",\n      getPattern: function Mesh_getPattern(ctx, owner, shadingFill) {\n        applyBoundingBox(ctx, bbox);\n        var scale;\n        if (shadingFill) {\n          scale = Util.singularValueDecompose2dScale(ctx.mozCurrentTransform);\n        } else {\n          // Obtain scale from matrix and current transformation matrix.\n          scale = Util.singularValueDecompose2dScale(owner.baseTransform);\n          if (matrix) {\n            var matrixScale = Util.singularValueDecompose2dScale(matrix);\n            scale = [scale[0] * matrixScale[0], scale[1] * matrixScale[1]];\n          }\n        }\n\n        // Rasterizing on the main thread since sending/queue large canvases\n        // might cause OOM.\n        var temporaryPatternCanvas = createMeshCanvas(\n          bounds,\n          scale,\n          coords,\n          colors,\n          figures,\n          shadingFill ? null : background,\n          owner.cachedCanvases,\n          owner.webGLContext\n        );\n\n        if (!shadingFill) {\n          ctx.setTransform.apply(ctx, owner.baseTransform);\n          if (matrix) {\n            ctx.transform.apply(ctx, matrix);\n          }\n        }\n\n        ctx.translate(\n          temporaryPatternCanvas.offsetX,\n          temporaryPatternCanvas.offsetY\n        );\n        ctx.scale(temporaryPatternCanvas.scaleX, temporaryPatternCanvas.scaleY);\n\n        return ctx.createPattern(temporaryPatternCanvas.canvas, \"no-repeat\");\n      },\n    };\n  },\n};\n\nShadingIRs.Dummy = {\n  fromIR: function Dummy_fromIR() {\n    return {\n      type: \"Pattern\",\n      getPattern: function Dummy_fromIR_getPattern() {\n        return \"hotpink\";\n      },\n    };\n  },\n};\n\nfunction getShadingPatternFromIR(raw) {\n  var shadingIR = ShadingIRs[raw[0]];\n  if (!shadingIR) {\n    throw new Error(`Unknown IR type: ${raw[0]}`);\n  }\n  return shadingIR.fromIR(raw);\n}\n\nvar TilingPattern = (function TilingPatternClosure() {\n  var PaintType = {\n    COLORED: 1,\n    UNCOLORED: 2,\n  };\n\n  var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough\n\n  function TilingPattern(IR, color, ctx, canvasGraphicsFactory, baseTransform) {\n    this.operatorList = IR[2];\n    this.matrix = IR[3] || [1, 0, 0, 1, 0, 0];\n    this.bbox = IR[4];\n    this.xstep = IR[5];\n    this.ystep = IR[6];\n    this.paintType = IR[7];\n    this.tilingType = IR[8];\n    this.color = color;\n    this.canvasGraphicsFactory = canvasGraphicsFactory;\n    this.baseTransform = baseTransform;\n    this.type = \"Pattern\";\n    this.ctx = ctx;\n  }\n\n  TilingPattern.prototype = {\n    createPatternCanvas: function TilinPattern_createPatternCanvas(owner) {\n      var operatorList = this.operatorList;\n      var bbox = this.bbox;\n      var xstep = this.xstep;\n      var ystep = this.ystep;\n      var paintType = this.paintType;\n      var tilingType = this.tilingType;\n      var color = this.color;\n      var canvasGraphicsFactory = this.canvasGraphicsFactory;\n\n      info(\"TilingType: \" + tilingType);\n\n      // A tiling pattern as defined by PDF spec 8.7.2 is a cell whose size is\n      // described by bbox, and may repeat regularly by shifting the cell by\n      // xstep and ystep.\n      // Because the HTML5 canvas API does not support pattern repetition with\n      // gaps in between, we use the xstep/ystep instead of the bbox's size.\n      //\n      // This has the following consequences (similarly for ystep):\n      //\n      // - If xstep is the same as bbox, then there is no observable difference.\n      //\n      // - If xstep is larger than bbox, then the pattern canvas is partially\n      //   empty: the area bounded by bbox is painted, the outside area is void.\n      //\n      // - If xstep is smaller than bbox, then the pixels between xstep and the\n      //   bbox boundary will be missing. This is INCORRECT behavior.\n      //   \"Figures on adjacent tiles should not overlap\" (PDF spec 8.7.3.1),\n      //   but overlapping cells without common pixels are still valid.\n      //   TODO: Fix the implementation, to allow this scenario to be painted\n      //   correctly.\n\n      var x0 = bbox[0],\n        y0 = bbox[1],\n        x1 = bbox[2],\n        y1 = bbox[3];\n\n      // Obtain scale from matrix and current transformation matrix.\n      var matrixScale = Util.singularValueDecompose2dScale(this.matrix);\n      var curMatrixScale = Util.singularValueDecompose2dScale(\n        this.baseTransform\n      );\n      var combinedScale = [\n        matrixScale[0] * curMatrixScale[0],\n        matrixScale[1] * curMatrixScale[1],\n      ];\n\n      // Use width and height values that are as close as possible to the end\n      // result when the pattern is used. Too low value makes the pattern look\n      // blurry. Too large value makes it look too crispy.\n      var dimx = this.getSizeAndScale(\n        xstep,\n        this.ctx.canvas.width,\n        combinedScale[0]\n      );\n      var dimy = this.getSizeAndScale(\n        ystep,\n        this.ctx.canvas.height,\n        combinedScale[1]\n      );\n\n      var tmpCanvas = owner.cachedCanvases.getCanvas(\n        \"pattern\",\n        dimx.size,\n        dimy.size,\n        true\n      );\n      var tmpCtx = tmpCanvas.context;\n      var graphics = canvasGraphicsFactory.createCanvasGraphics(tmpCtx);\n      graphics.groupLevel = owner.groupLevel;\n\n      this.setFillAndStrokeStyleToContext(graphics, paintType, color);\n\n      graphics.transform(dimx.scale, 0, 0, dimy.scale, 0, 0);\n\n      // transform coordinates to pattern space\n      graphics.transform(1, 0, 0, 1, -x0, -y0);\n\n      this.clipBbox(graphics, bbox, x0, y0, x1, y1);\n\n      graphics.executeOperatorList(operatorList);\n\n      this.ctx.transform(1, 0, 0, 1, x0, y0);\n\n      // Rescale canvas so that the ctx.createPattern call generates a pattern\n      // with the desired size.\n      this.ctx.scale(1 / dimx.scale, 1 / dimy.scale);\n      return tmpCanvas.canvas;\n    },\n\n    getSizeAndScale: function TilingPattern_getSizeAndScale(\n      step,\n      realOutputSize,\n      scale\n    ) {\n      // xstep / ystep may be negative -- normalize.\n      step = Math.abs(step);\n      // MAX_PATTERN_SIZE is used to avoid OOM situation.\n      // Use the destination canvas's size if it is bigger than the hard-coded\n      // limit of MAX_PATTERN_SIZE to avoid clipping patterns that cover the\n      // whole canvas.\n      var maxSize = Math.max(MAX_PATTERN_SIZE, realOutputSize);\n      var size = Math.ceil(step * scale);\n      if (size >= maxSize) {\n        size = maxSize;\n      } else {\n        scale = size / step;\n      }\n      return { scale, size };\n    },\n\n    clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) {\n      if (Array.isArray(bbox) && bbox.length === 4) {\n        var bboxWidth = x1 - x0;\n        var bboxHeight = y1 - y0;\n        graphics.ctx.rect(x0, y0, bboxWidth, bboxHeight);\n        graphics.clip();\n        graphics.endPath();\n      }\n    },\n\n    setFillAndStrokeStyleToContext: function setFillAndStrokeStyleToContext(\n      graphics,\n      paintType,\n      color\n    ) {\n      const context = graphics.ctx,\n        current = graphics.current;\n      switch (paintType) {\n        case PaintType.COLORED:\n          var ctx = this.ctx;\n          context.fillStyle = ctx.fillStyle;\n          context.strokeStyle = ctx.strokeStyle;\n          current.fillColor = ctx.fillStyle;\n          current.strokeColor = ctx.strokeStyle;\n          break;\n        case PaintType.UNCOLORED:\n          var cssColor = Util.makeCssRgb(color[0], color[1], color[2]);\n          context.fillStyle = cssColor;\n          context.strokeStyle = cssColor;\n          // Set color needed by image masks (fixes issues 3226 and 8741).\n          current.fillColor = cssColor;\n          current.strokeColor = cssColor;\n          break;\n        default:\n          throw new FormatError(`Unsupported paint type: ${paintType}`);\n      }\n    },\n\n    getPattern: function TilingPattern_getPattern(ctx, owner) {\n      ctx = this.ctx;\n      // PDF spec 8.7.2 NOTE 1: pattern's matrix is relative to initial matrix.\n      ctx.setTransform.apply(ctx, this.baseTransform);\n      ctx.transform.apply(ctx, this.matrix);\n\n      var temporaryPatternCanvas = this.createPatternCanvas(owner);\n\n      return ctx.createPattern(temporaryPatternCanvas, \"repeat\");\n    },\n  };\n\n  return TilingPattern;\n})();\n\nexport { getShadingPatternFromIR, TilingPattern };\n","/* Copyright 2018 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nconst GlobalWorkerOptions = Object.create(null);\n\n/**\n * Defines global port for worker process. Overrides the `workerSrc` option.\n * @var {Object}\n */\nGlobalWorkerOptions.workerPort =\n  GlobalWorkerOptions.workerPort === undefined\n    ? null\n    : GlobalWorkerOptions.workerPort;\n\n/**\n * A string containing the path and filename of the worker file.\n *\n * NOTE: The `workerSrc` option should always be set, in order to prevent any\n *       issues when using the PDF.js library.\n * @var {string}\n */\nGlobalWorkerOptions.workerSrc =\n  GlobalWorkerOptions.workerSrc === undefined\n    ? \"\"\n    : GlobalWorkerOptions.workerSrc;\n\nexport { GlobalWorkerOptions };\n","/* Copyright 2018 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error, prefer-const: error */\n\nimport {\n  AbortException,\n  assert,\n  createPromiseCapability,\n  MissingPDFException,\n  UnexpectedResponseException,\n  UnknownErrorException,\n} from \"./util.js\";\n\nconst CallbackKind = {\n  UNKNOWN: 0,\n  DATA: 1,\n  ERROR: 2,\n};\n\nconst StreamKind = {\n  UNKNOWN: 0,\n  CANCEL: 1,\n  CANCEL_COMPLETE: 2,\n  CLOSE: 3,\n  ENQUEUE: 4,\n  ERROR: 5,\n  PULL: 6,\n  PULL_COMPLETE: 7,\n  START_COMPLETE: 8,\n};\n\nfunction wrapReason(reason) {\n  if (\n    typeof PDFJSDev === \"undefined\" ||\n    PDFJSDev.test(\"!PRODUCTION || TESTING\")\n  ) {\n    assert(\n      reason instanceof Error ||\n        (typeof reason === \"object\" && reason !== null),\n      'wrapReason: Expected \"reason\" to be a (possibly cloned) Error.'\n    );\n  } else {\n    if (typeof reason !== \"object\" || reason === null) {\n      return reason;\n    }\n  }\n  switch (reason.name) {\n    case \"AbortException\":\n      return new AbortException(reason.message);\n    case \"MissingPDFException\":\n      return new MissingPDFException(reason.message);\n    case \"UnexpectedResponseException\":\n      return new UnexpectedResponseException(reason.message, reason.status);\n    case \"UnknownErrorException\":\n      return new UnknownErrorException(reason.message, reason.details);\n    default:\n      return new UnknownErrorException(reason.message, reason.toString());\n  }\n}\n\nclass MessageHandler {\n  constructor(sourceName, targetName, comObj) {\n    this.sourceName = sourceName;\n    this.targetName = targetName;\n    this.comObj = comObj;\n    this.callbackId = 1;\n    this.streamId = 1;\n    this.postMessageTransfers = true;\n    this.streamSinks = Object.create(null);\n    this.streamControllers = Object.create(null);\n    this.callbackCapabilities = Object.create(null);\n    this.actionHandler = Object.create(null);\n\n    this._onComObjOnMessage = event => {\n      const data = event.data;\n      if (data.targetName !== this.sourceName) {\n        return;\n      }\n      if (data.stream) {\n        this._processStreamMessage(data);\n        return;\n      }\n      if (data.callback) {\n        const callbackId = data.callbackId;\n        const capability = this.callbackCapabilities[callbackId];\n        if (!capability) {\n          throw new Error(`Cannot resolve callback ${callbackId}`);\n        }\n        delete this.callbackCapabilities[callbackId];\n\n        if (data.callback === CallbackKind.DATA) {\n          capability.resolve(data.data);\n        } else if (data.callback === CallbackKind.ERROR) {\n          capability.reject(wrapReason(data.reason));\n        } else {\n          throw new Error(\"Unexpected callback case\");\n        }\n        return;\n      }\n      const action = this.actionHandler[data.action];\n      if (!action) {\n        throw new Error(`Unknown action from worker: ${data.action}`);\n      }\n      if (data.callbackId) {\n        const sourceName = this.sourceName;\n        const targetName = data.sourceName;\n        new Promise(function(resolve) {\n          resolve(action(data.data));\n        }).then(\n          function(result) {\n            comObj.postMessage({\n              sourceName,\n              targetName,\n              callback: CallbackKind.DATA,\n              callbackId: data.callbackId,\n              data: result,\n            });\n          },\n          function(reason) {\n            comObj.postMessage({\n              sourceName,\n              targetName,\n              callback: CallbackKind.ERROR,\n              callbackId: data.callbackId,\n              reason: wrapReason(reason),\n            });\n          }\n        );\n        return;\n      }\n      if (data.streamId) {\n        this._createStreamSink(data);\n        return;\n      }\n      action(data.data);\n    };\n    comObj.addEventListener(\"message\", this._onComObjOnMessage);\n  }\n\n  on(actionName, handler) {\n    if (\n      typeof PDFJSDev === \"undefined\" ||\n      PDFJSDev.test(\"!PRODUCTION || TESTING\")\n    ) {\n      assert(\n        typeof handler === \"function\",\n        'MessageHandler.on: Expected \"handler\" to be a function.'\n      );\n    }\n    const ah = this.actionHandler;\n    if (ah[actionName]) {\n      throw new Error(`There is already an actionName called \"${actionName}\"`);\n    }\n    ah[actionName] = handler;\n  }\n\n  /**\n   * Sends a message to the comObj to invoke the action with the supplied data.\n   * @param {string} actionName - Action to call.\n   * @param {JSON} data - JSON data to send.\n   * @param {Array} [transfers] - List of transfers/ArrayBuffers.\n   */\n  send(actionName, data, transfers) {\n    this._postMessage(\n      {\n        sourceName: this.sourceName,\n        targetName: this.targetName,\n        action: actionName,\n        data,\n      },\n      transfers\n    );\n  }\n\n  /**\n   * Sends a message to the comObj to invoke the action with the supplied data.\n   * Expects that the other side will callback with the response.\n   * @param {string} actionName - Action to call.\n   * @param {JSON} data - JSON data to send.\n   * @param {Array} [transfers] - List of transfers/ArrayBuffers.\n   * @returns {Promise} Promise to be resolved with response data.\n   */\n  sendWithPromise(actionName, data, transfers) {\n    const callbackId = this.callbackId++;\n    const capability = createPromiseCapability();\n    this.callbackCapabilities[callbackId] = capability;\n    try {\n      this._postMessage(\n        {\n          sourceName: this.sourceName,\n          targetName: this.targetName,\n          action: actionName,\n          callbackId,\n          data,\n        },\n        transfers\n      );\n    } catch (ex) {\n      capability.reject(ex);\n    }\n    return capability.promise;\n  }\n\n  /**\n   * Sends a message to the comObj to invoke the action with the supplied data.\n   * Expect that the other side will callback to signal 'start_complete'.\n   * @param {string} actionName - Action to call.\n   * @param {JSON} data - JSON data to send.\n   * @param {Object} queueingStrategy - Strategy to signal backpressure based on\n   *                 internal queue.\n   * @param {Array} [transfers] - List of transfers/ArrayBuffers.\n   * @returns {ReadableStream} ReadableStream to read data in chunks.\n   */\n  sendWithStream(actionName, data, queueingStrategy, transfers) {\n    const streamId = this.streamId++;\n    const sourceName = this.sourceName;\n    const targetName = this.targetName;\n    const comObj = this.comObj;\n\n    return new ReadableStream(\n      {\n        start: controller => {\n          const startCapability = createPromiseCapability();\n          this.streamControllers[streamId] = {\n            controller,\n            startCall: startCapability,\n            pullCall: null,\n            cancelCall: null,\n            isClosed: false,\n          };\n          this._postMessage(\n            {\n              sourceName,\n              targetName,\n              action: actionName,\n              streamId,\n              data,\n              desiredSize: controller.desiredSize,\n            },\n            transfers\n          );\n          // Return Promise for Async process, to signal success/failure.\n          return startCapability.promise;\n        },\n\n        pull: controller => {\n          const pullCapability = createPromiseCapability();\n          this.streamControllers[streamId].pullCall = pullCapability;\n          comObj.postMessage({\n            sourceName,\n            targetName,\n            stream: StreamKind.PULL,\n            streamId,\n            desiredSize: controller.desiredSize,\n          });\n          // Returning Promise will not call \"pull\"\n          // again until current pull is resolved.\n          return pullCapability.promise;\n        },\n\n        cancel: reason => {\n          assert(reason instanceof Error, \"cancel must have a valid reason\");\n          const cancelCapability = createPromiseCapability();\n          this.streamControllers[streamId].cancelCall = cancelCapability;\n          this.streamControllers[streamId].isClosed = true;\n          comObj.postMessage({\n            sourceName,\n            targetName,\n            stream: StreamKind.CANCEL,\n            streamId,\n            reason: wrapReason(reason),\n          });\n          // Return Promise to signal success or failure.\n          return cancelCapability.promise;\n        },\n      },\n      queueingStrategy\n    );\n  }\n\n  /**\n   * @private\n   */\n  _createStreamSink(data) {\n    const self = this;\n    const action = this.actionHandler[data.action];\n    const streamId = data.streamId;\n    const sourceName = this.sourceName;\n    const targetName = data.sourceName;\n    const comObj = this.comObj;\n\n    const streamSink = {\n      enqueue(chunk, size = 1, transfers) {\n        if (this.isCancelled) {\n          return;\n        }\n        const lastDesiredSize = this.desiredSize;\n        this.desiredSize -= size;\n        // Enqueue decreases the desiredSize property of sink,\n        // so when it changes from positive to negative,\n        // set ready as unresolved promise.\n        if (lastDesiredSize > 0 && this.desiredSize <= 0) {\n          this.sinkCapability = createPromiseCapability();\n          this.ready = this.sinkCapability.promise;\n        }\n        self._postMessage(\n          {\n            sourceName,\n            targetName,\n            stream: StreamKind.ENQUEUE,\n            streamId,\n            chunk,\n          },\n          transfers\n        );\n      },\n\n      close() {\n        if (this.isCancelled) {\n          return;\n        }\n        this.isCancelled = true;\n        comObj.postMessage({\n          sourceName,\n          targetName,\n          stream: StreamKind.CLOSE,\n          streamId,\n        });\n        delete self.streamSinks[streamId];\n      },\n\n      error(reason) {\n        assert(reason instanceof Error, \"error must have a valid reason\");\n        if (this.isCancelled) {\n          return;\n        }\n        this.isCancelled = true;\n        comObj.postMessage({\n          sourceName,\n          targetName,\n          stream: StreamKind.ERROR,\n          streamId,\n          reason: wrapReason(reason),\n        });\n      },\n\n      sinkCapability: createPromiseCapability(),\n      onPull: null,\n      onCancel: null,\n      isCancelled: false,\n      desiredSize: data.desiredSize,\n      ready: null,\n    };\n\n    streamSink.sinkCapability.resolve();\n    streamSink.ready = streamSink.sinkCapability.promise;\n    this.streamSinks[streamId] = streamSink;\n    new Promise(function(resolve) {\n      resolve(action(data.data, streamSink));\n    }).then(\n      function() {\n        comObj.postMessage({\n          sourceName,\n          targetName,\n          stream: StreamKind.START_COMPLETE,\n          streamId,\n          success: true,\n        });\n      },\n      function(reason) {\n        comObj.postMessage({\n          sourceName,\n          targetName,\n          stream: StreamKind.START_COMPLETE,\n          streamId,\n          reason: wrapReason(reason),\n        });\n      }\n    );\n  }\n\n  /**\n   * @private\n   */\n  _processStreamMessage(data) {\n    const streamId = data.streamId;\n    const sourceName = this.sourceName;\n    const targetName = data.sourceName;\n    const comObj = this.comObj;\n\n    switch (data.stream) {\n      case StreamKind.START_COMPLETE:\n        if (data.success) {\n          this.streamControllers[streamId].startCall.resolve();\n        } else {\n          this.streamControllers[streamId].startCall.reject(\n            wrapReason(data.reason)\n          );\n        }\n        break;\n      case StreamKind.PULL_COMPLETE:\n        if (data.success) {\n          this.streamControllers[streamId].pullCall.resolve();\n        } else {\n          this.streamControllers[streamId].pullCall.reject(\n            wrapReason(data.reason)\n          );\n        }\n        break;\n      case StreamKind.PULL:\n        // Ignore any pull after close is called.\n        if (!this.streamSinks[streamId]) {\n          comObj.postMessage({\n            sourceName,\n            targetName,\n            stream: StreamKind.PULL_COMPLETE,\n            streamId,\n            success: true,\n          });\n          break;\n        }\n        // Pull increases the desiredSize property of sink,\n        // so when it changes from negative to positive,\n        // set ready property as resolved promise.\n        if (\n          this.streamSinks[streamId].desiredSize <= 0 &&\n          data.desiredSize > 0\n        ) {\n          this.streamSinks[streamId].sinkCapability.resolve();\n        }\n        // Reset desiredSize property of sink on every pull.\n        this.streamSinks[streamId].desiredSize = data.desiredSize;\n        const { onPull } = this.streamSinks[data.streamId];\n        new Promise(function(resolve) {\n          resolve(onPull && onPull());\n        }).then(\n          function() {\n            comObj.postMessage({\n              sourceName,\n              targetName,\n              stream: StreamKind.PULL_COMPLETE,\n              streamId,\n              success: true,\n            });\n          },\n          function(reason) {\n            comObj.postMessage({\n              sourceName,\n              targetName,\n              stream: StreamKind.PULL_COMPLETE,\n              streamId,\n              reason: wrapReason(reason),\n            });\n          }\n        );\n        break;\n      case StreamKind.ENQUEUE:\n        assert(\n          this.streamControllers[streamId],\n          \"enqueue should have stream controller\"\n        );\n        if (this.streamControllers[streamId].isClosed) {\n          break;\n        }\n        this.streamControllers[streamId].controller.enqueue(data.chunk);\n        break;\n      case StreamKind.CLOSE:\n        assert(\n          this.streamControllers[streamId],\n          \"close should have stream controller\"\n        );\n        if (this.streamControllers[streamId].isClosed) {\n          break;\n        }\n        this.streamControllers[streamId].isClosed = true;\n        this.streamControllers[streamId].controller.close();\n        this._deleteStreamController(streamId);\n        break;\n      case StreamKind.ERROR:\n        assert(\n          this.streamControllers[streamId],\n          \"error should have stream controller\"\n        );\n        this.streamControllers[streamId].controller.error(\n          wrapReason(data.reason)\n        );\n        this._deleteStreamController(streamId);\n        break;\n      case StreamKind.CANCEL_COMPLETE:\n        if (data.success) {\n          this.streamControllers[streamId].cancelCall.resolve();\n        } else {\n          this.streamControllers[streamId].cancelCall.reject(\n            wrapReason(data.reason)\n          );\n        }\n        this._deleteStreamController(streamId);\n        break;\n      case StreamKind.CANCEL:\n        if (!this.streamSinks[streamId]) {\n          break;\n        }\n        const { onCancel } = this.streamSinks[data.streamId];\n        new Promise(function(resolve) {\n          resolve(onCancel && onCancel(wrapReason(data.reason)));\n        }).then(\n          function() {\n            comObj.postMessage({\n              sourceName,\n              targetName,\n              stream: StreamKind.CANCEL_COMPLETE,\n              streamId,\n              success: true,\n            });\n          },\n          function(reason) {\n            comObj.postMessage({\n              sourceName,\n              targetName,\n              stream: StreamKind.CANCEL_COMPLETE,\n              streamId,\n              reason: wrapReason(reason),\n            });\n          }\n        );\n        this.streamSinks[streamId].sinkCapability.reject(\n          wrapReason(data.reason)\n        );\n        this.streamSinks[streamId].isCancelled = true;\n        delete this.streamSinks[streamId];\n        break;\n      default:\n        throw new Error(\"Unexpected stream case\");\n    }\n  }\n\n  /**\n   * @private\n   */\n  async _deleteStreamController(streamId) {\n    // Delete the `streamController` only when the start, pull, and cancel\n    // capabilities have settled, to prevent `TypeError`s.\n    await Promise.allSettled(\n      [\n        this.streamControllers[streamId].startCall,\n        this.streamControllers[streamId].pullCall,\n        this.streamControllers[streamId].cancelCall,\n      ].map(function(capability) {\n        return capability && capability.promise;\n      })\n    );\n    delete this.streamControllers[streamId];\n  }\n\n  /**\n   * Sends raw message to the comObj.\n   * @param {Object} message - Raw message.\n   * @param transfers List of transfers/ArrayBuffers, or undefined.\n   * @private\n   */\n  _postMessage(message, transfers) {\n    if (transfers && this.postMessageTransfers) {\n      this.comObj.postMessage(message, transfers);\n    } else {\n      this.comObj.postMessage(message);\n    }\n  }\n\n  destroy() {\n    this.comObj.removeEventListener(\"message\", this._onComObjOnMessage);\n  }\n}\n\nexport { MessageHandler };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { assert } from \"../shared/util.js\";\nimport { SimpleXMLParser } from \"./xml_parser.js\";\n\nclass Metadata {\n  constructor(data) {\n    assert(typeof data === \"string\", \"Metadata: input is not a string\");\n\n    // Ghostscript may produce invalid metadata, so try to repair that first.\n    data = this._repair(data);\n\n    // Convert the string to an XML document.\n    const parser = new SimpleXMLParser();\n    const xmlDocument = parser.parseFromString(data);\n\n    this._metadataMap = new Map();\n\n    if (xmlDocument) {\n      this._parse(xmlDocument);\n    }\n  }\n\n  _repair(data) {\n    // Start by removing any \"junk\" before the first tag (see issue 10395).\n    return data\n      .replace(/^[^<]+/, \"\")\n      .replace(/>\\\\376\\\\377([^<]+)/g, function(all, codes) {\n        const bytes = codes\n          .replace(/\\\\([0-3])([0-7])([0-7])/g, function(code, d1, d2, d3) {\n            return String.fromCharCode(d1 * 64 + d2 * 8 + d3 * 1);\n          })\n          .replace(/&(amp|apos|gt|lt|quot);/g, function(str, name) {\n            switch (name) {\n              case \"amp\":\n                return \"&\";\n              case \"apos\":\n                return \"'\";\n              case \"gt\":\n                return \">\";\n              case \"lt\":\n                return \"<\";\n              case \"quot\":\n                return '\"';\n            }\n            throw new Error(`_repair: ${name} isn't defined.`);\n          });\n\n        let chars = \"\";\n        for (let i = 0, ii = bytes.length; i < ii; i += 2) {\n          const code = bytes.charCodeAt(i) * 256 + bytes.charCodeAt(i + 1);\n          if (\n            code >= /* Space = */ 32 &&\n            code < /* Delete = */ 127 &&\n            code !== /* '<' = */ 60 &&\n            code !== /* '>' = */ 62 &&\n            code !== /* '&' = */ 38\n          ) {\n            chars += String.fromCharCode(code);\n          } else {\n            chars += \"&#x\" + (0x10000 + code).toString(16).substring(1) + \";\";\n          }\n        }\n\n        return \">\" + chars;\n      });\n  }\n\n  _parse(xmlDocument) {\n    let rdf = xmlDocument.documentElement;\n\n    if (rdf.nodeName.toLowerCase() !== \"rdf:rdf\") {\n      // Wrapped in <xmpmeta>\n      rdf = rdf.firstChild;\n      while (rdf && rdf.nodeName.toLowerCase() !== \"rdf:rdf\") {\n        rdf = rdf.nextSibling;\n      }\n    }\n\n    const nodeName = rdf ? rdf.nodeName.toLowerCase() : null;\n    if (!rdf || nodeName !== \"rdf:rdf\" || !rdf.hasChildNodes()) {\n      return;\n    }\n\n    const children = rdf.childNodes;\n    for (let i = 0, ii = children.length; i < ii; i++) {\n      const desc = children[i];\n      if (desc.nodeName.toLowerCase() !== \"rdf:description\") {\n        continue;\n      }\n\n      for (let j = 0, jj = desc.childNodes.length; j < jj; j++) {\n        if (desc.childNodes[j].nodeName.toLowerCase() !== \"#text\") {\n          const entry = desc.childNodes[j];\n          const name = entry.nodeName.toLowerCase();\n\n          this._metadataMap.set(name, entry.textContent.trim());\n        }\n      }\n    }\n  }\n\n  get(name) {\n    return this._metadataMap.has(name) ? this._metadataMap.get(name) : null;\n  }\n\n  getAll() {\n    const obj = Object.create(null);\n    for (const [key, value] of this._metadataMap) {\n      obj[key] = value;\n    }\n    return obj;\n  }\n\n  has(name) {\n    return this._metadataMap.has(name);\n  }\n}\n\nexport { Metadata };\n","/* Copyright 2018 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n// The code for XMLParserBase copied from\n// https://github.com/mozilla/shumway/blob/16451d8836fa85f4b16eeda8b4bda2fa9e2b22b0/src/avm2/natives/xml.ts\n\nconst XMLParserErrorCode = {\n  NoError: 0,\n  EndOfDocument: -1,\n  UnterminatedCdat: -2,\n  UnterminatedXmlDeclaration: -3,\n  UnterminatedDoctypeDeclaration: -4,\n  UnterminatedComment: -5,\n  MalformedElement: -6,\n  OutOfMemory: -7,\n  UnterminatedAttributeValue: -8,\n  UnterminatedElement: -9,\n  ElementNeverBegun: -10,\n};\n\nfunction isWhitespace(s, index) {\n  const ch = s[index];\n  return ch === \" \" || ch === \"\\n\" || ch === \"\\r\" || ch === \"\\t\";\n}\n\nfunction isWhitespaceString(s) {\n  for (let i = 0, ii = s.length; i < ii; i++) {\n    if (!isWhitespace(s, i)) {\n      return false;\n    }\n  }\n  return true;\n}\n\nclass XMLParserBase {\n  _resolveEntities(s) {\n    return s.replace(/&([^;]+);/g, (all, entity) => {\n      if (entity.substring(0, 2) === \"#x\") {\n        return String.fromCharCode(parseInt(entity.substring(2), 16));\n      } else if (entity.substring(0, 1) === \"#\") {\n        return String.fromCharCode(parseInt(entity.substring(1), 10));\n      }\n      switch (entity) {\n        case \"lt\":\n          return \"<\";\n        case \"gt\":\n          return \">\";\n        case \"amp\":\n          return \"&\";\n        case \"quot\":\n          return '\"';\n      }\n      return this.onResolveEntity(entity);\n    });\n  }\n\n  _parseContent(s, start) {\n    const attributes = [];\n    let pos = start;\n\n    function skipWs() {\n      while (pos < s.length && isWhitespace(s, pos)) {\n        ++pos;\n      }\n    }\n\n    while (\n      pos < s.length &&\n      !isWhitespace(s, pos) &&\n      s[pos] !== \">\" &&\n      s[pos] !== \"/\"\n    ) {\n      ++pos;\n    }\n    const name = s.substring(start, pos);\n    skipWs();\n    while (\n      pos < s.length &&\n      s[pos] !== \">\" &&\n      s[pos] !== \"/\" &&\n      s[pos] !== \"?\"\n    ) {\n      skipWs();\n      let attrName = \"\",\n        attrValue = \"\";\n      while (pos < s.length && !isWhitespace(s, pos) && s[pos] !== \"=\") {\n        attrName += s[pos];\n        ++pos;\n      }\n      skipWs();\n      if (s[pos] !== \"=\") {\n        return null;\n      }\n      ++pos;\n      skipWs();\n      const attrEndChar = s[pos];\n      if (attrEndChar !== '\"' && attrEndChar !== \"'\") {\n        return null;\n      }\n      const attrEndIndex = s.indexOf(attrEndChar, ++pos);\n      if (attrEndIndex < 0) {\n        return null;\n      }\n      attrValue = s.substring(pos, attrEndIndex);\n      attributes.push({\n        name: attrName,\n        value: this._resolveEntities(attrValue),\n      });\n      pos = attrEndIndex + 1;\n      skipWs();\n    }\n    return {\n      name,\n      attributes,\n      parsed: pos - start,\n    };\n  }\n\n  _parseProcessingInstruction(s, start) {\n    let pos = start;\n\n    function skipWs() {\n      while (pos < s.length && isWhitespace(s, pos)) {\n        ++pos;\n      }\n    }\n\n    while (\n      pos < s.length &&\n      !isWhitespace(s, pos) &&\n      s[pos] !== \">\" &&\n      s[pos] !== \"/\"\n    ) {\n      ++pos;\n    }\n    const name = s.substring(start, pos);\n    skipWs();\n    const attrStart = pos;\n    while (pos < s.length && (s[pos] !== \"?\" || s[pos + 1] !== \">\")) {\n      ++pos;\n    }\n    const value = s.substring(attrStart, pos);\n    return {\n      name,\n      value,\n      parsed: pos - start,\n    };\n  }\n\n  parseXml(s) {\n    let i = 0;\n    while (i < s.length) {\n      const ch = s[i];\n      let j = i;\n      if (ch === \"<\") {\n        ++j;\n        const ch2 = s[j];\n        let q;\n        switch (ch2) {\n          case \"/\":\n            ++j;\n            q = s.indexOf(\">\", j);\n            if (q < 0) {\n              this.onError(XMLParserErrorCode.UnterminatedElement);\n              return;\n            }\n            this.onEndElement(s.substring(j, q));\n            j = q + 1;\n            break;\n          case \"?\":\n            ++j;\n            const pi = this._parseProcessingInstruction(s, j);\n            if (s.substring(j + pi.parsed, j + pi.parsed + 2) !== \"?>\") {\n              this.onError(XMLParserErrorCode.UnterminatedXmlDeclaration);\n              return;\n            }\n            this.onPi(pi.name, pi.value);\n            j += pi.parsed + 2;\n            break;\n          case \"!\":\n            if (s.substring(j + 1, j + 3) === \"--\") {\n              q = s.indexOf(\"-->\", j + 3);\n              if (q < 0) {\n                this.onError(XMLParserErrorCode.UnterminatedComment);\n                return;\n              }\n              this.onComment(s.substring(j + 3, q));\n              j = q + 3;\n            } else if (s.substring(j + 1, j + 8) === \"[CDATA[\") {\n              q = s.indexOf(\"]]>\", j + 8);\n              if (q < 0) {\n                this.onError(XMLParserErrorCode.UnterminatedCdat);\n                return;\n              }\n              this.onCdata(s.substring(j + 8, q));\n              j = q + 3;\n            } else if (s.substring(j + 1, j + 8) === \"DOCTYPE\") {\n              const q2 = s.indexOf(\"[\", j + 8);\n              let complexDoctype = false;\n              q = s.indexOf(\">\", j + 8);\n              if (q < 0) {\n                this.onError(XMLParserErrorCode.UnterminatedDoctypeDeclaration);\n                return;\n              }\n              if (q2 > 0 && q > q2) {\n                q = s.indexOf(\"]>\", j + 8);\n                if (q < 0) {\n                  this.onError(\n                    XMLParserErrorCode.UnterminatedDoctypeDeclaration\n                  );\n                  return;\n                }\n                complexDoctype = true;\n              }\n              const doctypeContent = s.substring(\n                j + 8,\n                q + (complexDoctype ? 1 : 0)\n              );\n              this.onDoctype(doctypeContent);\n              j = q + (complexDoctype ? 2 : 1);\n            } else {\n              this.onError(XMLParserErrorCode.MalformedElement);\n              return;\n            }\n            break;\n          default:\n            const content = this._parseContent(s, j);\n            if (content === null) {\n              this.onError(XMLParserErrorCode.MalformedElement);\n              return;\n            }\n            let isClosed = false;\n            if (\n              s.substring(j + content.parsed, j + content.parsed + 2) === \"/>\"\n            ) {\n              isClosed = true;\n            } else if (\n              s.substring(j + content.parsed, j + content.parsed + 1) !== \">\"\n            ) {\n              this.onError(XMLParserErrorCode.UnterminatedElement);\n              return;\n            }\n            this.onBeginElement(content.name, content.attributes, isClosed);\n            j += content.parsed + (isClosed ? 2 : 1);\n            break;\n        }\n      } else {\n        while (j < s.length && s[j] !== \"<\") {\n          j++;\n        }\n        const text = s.substring(i, j);\n        this.onText(this._resolveEntities(text));\n      }\n      i = j;\n    }\n  }\n\n  onResolveEntity(name) {\n    return `&${name};`;\n  }\n\n  onPi(name, value) {}\n\n  onComment(text) {}\n\n  onCdata(text) {}\n\n  onDoctype(doctypeContent) {}\n\n  onText(text) {}\n\n  onBeginElement(name, attributes, isEmpty) {}\n\n  onEndElement(name) {}\n\n  onError(code) {}\n}\n\nclass SimpleDOMNode {\n  constructor(nodeName, nodeValue) {\n    this.nodeName = nodeName;\n    this.nodeValue = nodeValue;\n\n    Object.defineProperty(this, \"parentNode\", { value: null, writable: true });\n  }\n\n  get firstChild() {\n    return this.childNodes && this.childNodes[0];\n  }\n\n  get nextSibling() {\n    const childNodes = this.parentNode.childNodes;\n    if (!childNodes) {\n      return undefined;\n    }\n    const index = childNodes.indexOf(this);\n    if (index === -1) {\n      return undefined;\n    }\n    return childNodes[index + 1];\n  }\n\n  get textContent() {\n    if (!this.childNodes) {\n      return this.nodeValue || \"\";\n    }\n    return this.childNodes\n      .map(function(child) {\n        return child.textContent;\n      })\n      .join(\"\");\n  }\n\n  hasChildNodes() {\n    return this.childNodes && this.childNodes.length > 0;\n  }\n}\n\nclass SimpleXMLParser extends XMLParserBase {\n  constructor() {\n    super();\n    this._currentFragment = null;\n    this._stack = null;\n    this._errorCode = XMLParserErrorCode.NoError;\n  }\n\n  parseFromString(data) {\n    this._currentFragment = [];\n    this._stack = [];\n    this._errorCode = XMLParserErrorCode.NoError;\n\n    this.parseXml(data);\n\n    if (this._errorCode !== XMLParserErrorCode.NoError) {\n      return undefined; // return undefined on error\n    }\n\n    // We should only have one root.\n    const [documentElement] = this._currentFragment;\n    if (!documentElement) {\n      return undefined; // Return undefined if no root was found.\n    }\n    return { documentElement };\n  }\n\n  onResolveEntity(name) {\n    switch (name) {\n      case \"apos\":\n        return \"'\";\n    }\n    return super.onResolveEntity(name);\n  }\n\n  onText(text) {\n    if (isWhitespaceString(text)) {\n      return;\n    }\n    const node = new SimpleDOMNode(\"#text\", text);\n    this._currentFragment.push(node);\n  }\n\n  onCdata(text) {\n    const node = new SimpleDOMNode(\"#text\", text);\n    this._currentFragment.push(node);\n  }\n\n  onBeginElement(name, attributes, isEmpty) {\n    const node = new SimpleDOMNode(name);\n    node.childNodes = [];\n    this._currentFragment.push(node);\n    if (isEmpty) {\n      return;\n    }\n    this._stack.push(this._currentFragment);\n    this._currentFragment = node.childNodes;\n  }\n\n  onEndElement(name) {\n    this._currentFragment = this._stack.pop() || [];\n    const lastElement = this._currentFragment[this._currentFragment.length - 1];\n    if (!lastElement) {\n      return;\n    }\n    for (let i = 0, ii = lastElement.childNodes.length; i < ii; i++) {\n      lastElement.childNodes[i].parentNode = lastElement;\n    }\n  }\n\n  onError(code) {\n    this._errorCode = code;\n  }\n}\n\nexport { SimpleXMLParser };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\nimport { assert, createPromiseCapability } from \"../shared/util.js\";\n\n/** @implements {IPDFStream} */\nclass PDFDataTransportStream {\n  constructor(params, pdfDataRangeTransport) {\n    assert(pdfDataRangeTransport);\n\n    this._queuedChunks = [];\n    this._progressiveDone = params.progressiveDone || false;\n\n    const initialData = params.initialData;\n    if (initialData && initialData.length > 0) {\n      const buffer = new Uint8Array(initialData).buffer;\n      this._queuedChunks.push(buffer);\n    }\n\n    this._pdfDataRangeTransport = pdfDataRangeTransport;\n    this._isStreamingSupported = !params.disableStream;\n    this._isRangeSupported = !params.disableRange;\n    this._contentLength = params.length;\n\n    this._fullRequestReader = null;\n    this._rangeReaders = [];\n\n    this._pdfDataRangeTransport.addRangeListener((begin, chunk) => {\n      this._onReceiveData({ begin, chunk });\n    });\n\n    this._pdfDataRangeTransport.addProgressListener((loaded, total) => {\n      this._onProgress({ loaded, total });\n    });\n\n    this._pdfDataRangeTransport.addProgressiveReadListener(chunk => {\n      this._onReceiveData({ chunk });\n    });\n\n    this._pdfDataRangeTransport.addProgressiveDoneListener(() => {\n      this._onProgressiveDone();\n    });\n\n    this._pdfDataRangeTransport.transportReady();\n  }\n\n  _onReceiveData(args) {\n    const buffer = new Uint8Array(args.chunk).buffer;\n    if (args.begin === undefined) {\n      if (this._fullRequestReader) {\n        this._fullRequestReader._enqueue(buffer);\n      } else {\n        this._queuedChunks.push(buffer);\n      }\n    } else {\n      const found = this._rangeReaders.some(function(rangeReader) {\n        if (rangeReader._begin !== args.begin) {\n          return false;\n        }\n        rangeReader._enqueue(buffer);\n        return true;\n      });\n      assert(found);\n    }\n  }\n\n  get _progressiveDataLength() {\n    return this._fullRequestReader ? this._fullRequestReader._loaded : 0;\n  }\n\n  _onProgress(evt) {\n    if (evt.total === undefined) {\n      // Reporting to first range reader, if it exists.\n      const firstReader = this._rangeReaders[0];\n      if (firstReader && firstReader.onProgress) {\n        firstReader.onProgress({ loaded: evt.loaded });\n      }\n    } else {\n      const fullReader = this._fullRequestReader;\n      if (fullReader && fullReader.onProgress) {\n        fullReader.onProgress({ loaded: evt.loaded, total: evt.total });\n      }\n    }\n  }\n\n  _onProgressiveDone() {\n    if (this._fullRequestReader) {\n      this._fullRequestReader.progressiveDone();\n    }\n    this._progressiveDone = true;\n  }\n\n  _removeRangeReader(reader) {\n    const i = this._rangeReaders.indexOf(reader);\n    if (i >= 0) {\n      this._rangeReaders.splice(i, 1);\n    }\n  }\n\n  getFullReader() {\n    assert(!this._fullRequestReader);\n    const queuedChunks = this._queuedChunks;\n    this._queuedChunks = null;\n    return new PDFDataTransportStreamReader(\n      this,\n      queuedChunks,\n      this._progressiveDone\n    );\n  }\n\n  getRangeReader(begin, end) {\n    if (end <= this._progressiveDataLength) {\n      return null;\n    }\n    const reader = new PDFDataTransportStreamRangeReader(this, begin, end);\n    this._pdfDataRangeTransport.requestDataRange(begin, end);\n    this._rangeReaders.push(reader);\n    return reader;\n  }\n\n  cancelAllRequests(reason) {\n    if (this._fullRequestReader) {\n      this._fullRequestReader.cancel(reason);\n    }\n    const readers = this._rangeReaders.slice(0);\n    readers.forEach(function(rangeReader) {\n      rangeReader.cancel(reason);\n    });\n    this._pdfDataRangeTransport.abort();\n  }\n}\n\n/** @implements {IPDFStreamReader} */\nclass PDFDataTransportStreamReader {\n  constructor(stream, queuedChunks, progressiveDone = false) {\n    this._stream = stream;\n    this._done = progressiveDone || false;\n    this._filename = null;\n    this._queuedChunks = queuedChunks || [];\n    this._loaded = 0;\n    for (const chunk of this._queuedChunks) {\n      this._loaded += chunk.byteLength;\n    }\n    this._requests = [];\n    this._headersReady = Promise.resolve();\n    stream._fullRequestReader = this;\n\n    this.onProgress = null;\n  }\n\n  _enqueue(chunk) {\n    if (this._done) {\n      return; // Ignore new data.\n    }\n    if (this._requests.length > 0) {\n      const requestCapability = this._requests.shift();\n      requestCapability.resolve({ value: chunk, done: false });\n    } else {\n      this._queuedChunks.push(chunk);\n    }\n    this._loaded += chunk.byteLength;\n  }\n\n  get headersReady() {\n    return this._headersReady;\n  }\n\n  get filename() {\n    return this._filename;\n  }\n\n  get isRangeSupported() {\n    return this._stream._isRangeSupported;\n  }\n\n  get isStreamingSupported() {\n    return this._stream._isStreamingSupported;\n  }\n\n  get contentLength() {\n    return this._stream._contentLength;\n  }\n\n  async read() {\n    if (this._queuedChunks.length > 0) {\n      const chunk = this._queuedChunks.shift();\n      return { value: chunk, done: false };\n    }\n    if (this._done) {\n      return { value: undefined, done: true };\n    }\n    const requestCapability = createPromiseCapability();\n    this._requests.push(requestCapability);\n    return requestCapability.promise;\n  }\n\n  cancel(reason) {\n    this._done = true;\n    this._requests.forEach(function(requestCapability) {\n      requestCapability.resolve({ value: undefined, done: true });\n    });\n    this._requests = [];\n  }\n\n  progressiveDone() {\n    if (this._done) {\n      return;\n    }\n    this._done = true;\n  }\n}\n\n/** @implements {IPDFStreamRangeReader} */\nclass PDFDataTransportStreamRangeReader {\n  constructor(stream, begin, end) {\n    this._stream = stream;\n    this._begin = begin;\n    this._end = end;\n    this._queuedChunk = null;\n    this._requests = [];\n    this._done = false;\n\n    this.onProgress = null;\n  }\n\n  _enqueue(chunk) {\n    if (this._done) {\n      return; // ignore new data\n    }\n    if (this._requests.length === 0) {\n      this._queuedChunk = chunk;\n    } else {\n      const requestsCapability = this._requests.shift();\n      requestsCapability.resolve({ value: chunk, done: false });\n      this._requests.forEach(function(requestCapability) {\n        requestCapability.resolve({ value: undefined, done: true });\n      });\n      this._requests = [];\n    }\n    this._done = true;\n    this._stream._removeRangeReader(this);\n  }\n\n  get isStreamingSupported() {\n    return false;\n  }\n\n  async read() {\n    if (this._queuedChunk) {\n      const chunk = this._queuedChunk;\n      this._queuedChunk = null;\n      return { value: chunk, done: false };\n    }\n    if (this._done) {\n      return { value: undefined, done: true };\n    }\n    const requestCapability = createPromiseCapability();\n    this._requests.push(requestCapability);\n    return requestCapability.promise;\n  }\n\n  cancel(reason) {\n    this._done = true;\n    this._requests.forEach(function(requestCapability) {\n      requestCapability.resolve({ value: undefined, done: true });\n    });\n    this._requests = [];\n    this._stream._removeRangeReader(this);\n  }\n}\n\nexport { PDFDataTransportStream };\n","/* Copyright 2014 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint-disable no-multi-str */\n\nimport { shadow } from \"../shared/util.js\";\n\nclass WebGLContext {\n  constructor({ enable = false }) {\n    this._enabled = enable === true;\n  }\n\n  get isEnabled() {\n    let enabled = this._enabled;\n    if (enabled) {\n      enabled = WebGLUtils.tryInitGL();\n    }\n    return shadow(this, \"isEnabled\", enabled);\n  }\n\n  composeSMask({ layer, mask, properties }) {\n    return WebGLUtils.composeSMask(layer, mask, properties);\n  }\n\n  drawFigures({ width, height, backgroundColor, figures, context }) {\n    return WebGLUtils.drawFigures(\n      width,\n      height,\n      backgroundColor,\n      figures,\n      context\n    );\n  }\n\n  clear() {\n    WebGLUtils.cleanup();\n  }\n}\n\nvar WebGLUtils = (function WebGLUtilsClosure() {\n  function loadShader(gl, code, shaderType) {\n    var shader = gl.createShader(shaderType);\n    gl.shaderSource(shader, code);\n    gl.compileShader(shader);\n    var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS);\n    if (!compiled) {\n      var errorMsg = gl.getShaderInfoLog(shader);\n      throw new Error(\"Error during shader compilation: \" + errorMsg);\n    }\n    return shader;\n  }\n  function createVertexShader(gl, code) {\n    return loadShader(gl, code, gl.VERTEX_SHADER);\n  }\n  function createFragmentShader(gl, code) {\n    return loadShader(gl, code, gl.FRAGMENT_SHADER);\n  }\n  function createProgram(gl, shaders) {\n    var program = gl.createProgram();\n    for (var i = 0, ii = shaders.length; i < ii; ++i) {\n      gl.attachShader(program, shaders[i]);\n    }\n    gl.linkProgram(program);\n    var linked = gl.getProgramParameter(program, gl.LINK_STATUS);\n    if (!linked) {\n      var errorMsg = gl.getProgramInfoLog(program);\n      throw new Error(\"Error during program linking: \" + errorMsg);\n    }\n    return program;\n  }\n  function createTexture(gl, image, textureId) {\n    gl.activeTexture(textureId);\n    var texture = gl.createTexture();\n    gl.bindTexture(gl.TEXTURE_2D, texture);\n\n    // Set the parameters so we can render any size image.\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);\n\n    // Upload the image into the texture.\n    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);\n    return texture;\n  }\n\n  var currentGL, currentCanvas;\n  function generateGL() {\n    if (currentGL) {\n      return;\n    }\n\n    // The temporary canvas is used in the WebGL context.\n    currentCanvas = document.createElement(\"canvas\");\n    currentGL = currentCanvas.getContext(\"webgl\", {\n      premultipliedalpha: false,\n    });\n  }\n\n  var smaskVertexShaderCode =\n    \"\\\n  attribute vec2 a_position;                                    \\\n  attribute vec2 a_texCoord;                                    \\\n                                                                \\\n  uniform vec2 u_resolution;                                    \\\n                                                                \\\n  varying vec2 v_texCoord;                                      \\\n                                                                \\\n  void main() {                                                 \\\n    vec2 clipSpace = (a_position / u_resolution) * 2.0 - 1.0;   \\\n    gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);          \\\n                                                                \\\n    v_texCoord = a_texCoord;                                    \\\n  }                                                             \";\n\n  var smaskFragmentShaderCode =\n    \"\\\n  precision mediump float;                                      \\\n                                                                \\\n  uniform vec4 u_backdrop;                                      \\\n  uniform int u_subtype;                                        \\\n  uniform sampler2D u_image;                                    \\\n  uniform sampler2D u_mask;                                     \\\n                                                                \\\n  varying vec2 v_texCoord;                                      \\\n                                                                \\\n  void main() {                                                 \\\n    vec4 imageColor = texture2D(u_image, v_texCoord);           \\\n    vec4 maskColor = texture2D(u_mask, v_texCoord);             \\\n    if (u_backdrop.a > 0.0) {                                   \\\n      maskColor.rgb = maskColor.rgb * maskColor.a +             \\\n                      u_backdrop.rgb * (1.0 - maskColor.a);     \\\n    }                                                           \\\n    float lum;                                                  \\\n    if (u_subtype == 0) {                                       \\\n      lum = maskColor.a;                                        \\\n    } else {                                                    \\\n      lum = maskColor.r * 0.3 + maskColor.g * 0.59 +            \\\n            maskColor.b * 0.11;                                 \\\n    }                                                           \\\n    imageColor.a *= lum;                                        \\\n    imageColor.rgb *= imageColor.a;                             \\\n    gl_FragColor = imageColor;                                  \\\n  }                                                             \";\n\n  var smaskCache = null;\n\n  function initSmaskGL() {\n    var canvas, gl;\n\n    generateGL();\n    canvas = currentCanvas;\n    currentCanvas = null;\n    gl = currentGL;\n    currentGL = null;\n\n    // setup a GLSL program\n    var vertexShader = createVertexShader(gl, smaskVertexShaderCode);\n    var fragmentShader = createFragmentShader(gl, smaskFragmentShaderCode);\n    var program = createProgram(gl, [vertexShader, fragmentShader]);\n    gl.useProgram(program);\n\n    var cache = {};\n    cache.gl = gl;\n    cache.canvas = canvas;\n    cache.resolutionLocation = gl.getUniformLocation(program, \"u_resolution\");\n    cache.positionLocation = gl.getAttribLocation(program, \"a_position\");\n    cache.backdropLocation = gl.getUniformLocation(program, \"u_backdrop\");\n    cache.subtypeLocation = gl.getUniformLocation(program, \"u_subtype\");\n\n    var texCoordLocation = gl.getAttribLocation(program, \"a_texCoord\");\n    var texLayerLocation = gl.getUniformLocation(program, \"u_image\");\n    var texMaskLocation = gl.getUniformLocation(program, \"u_mask\");\n\n    // provide texture coordinates for the rectangle.\n    var texCoordBuffer = gl.createBuffer();\n    gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);\n    // prettier-ignore\n    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([\n      0.0, 0.0,\n      1.0, 0.0,\n      0.0, 1.0,\n      0.0, 1.0,\n      1.0, 0.0,\n      1.0, 1.0]), gl.STATIC_DRAW);\n    gl.enableVertexAttribArray(texCoordLocation);\n    gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0);\n\n    gl.uniform1i(texLayerLocation, 0);\n    gl.uniform1i(texMaskLocation, 1);\n\n    smaskCache = cache;\n  }\n\n  function composeSMask(layer, mask, properties) {\n    var width = layer.width,\n      height = layer.height;\n\n    if (!smaskCache) {\n      initSmaskGL();\n    }\n    var cache = smaskCache,\n      canvas = cache.canvas,\n      gl = cache.gl;\n    canvas.width = width;\n    canvas.height = height;\n    gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);\n    gl.uniform2f(cache.resolutionLocation, width, height);\n\n    if (properties.backdrop) {\n      gl.uniform4f(\n        cache.resolutionLocation,\n        properties.backdrop[0],\n        properties.backdrop[1],\n        properties.backdrop[2],\n        1\n      );\n    } else {\n      gl.uniform4f(cache.resolutionLocation, 0, 0, 0, 0);\n    }\n    gl.uniform1i(\n      cache.subtypeLocation,\n      properties.subtype === \"Luminosity\" ? 1 : 0\n    );\n\n    // Create a textures\n    var texture = createTexture(gl, layer, gl.TEXTURE0);\n    var maskTexture = createTexture(gl, mask, gl.TEXTURE1);\n\n    // Create a buffer and put a single clipspace rectangle in\n    // it (2 triangles)\n    var buffer = gl.createBuffer();\n    gl.bindBuffer(gl.ARRAY_BUFFER, buffer);\n    // prettier-ignore\n    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([\n      0, 0,\n      width, 0,\n      0, height,\n      0, height,\n      width, 0,\n      width, height]), gl.STATIC_DRAW);\n    gl.enableVertexAttribArray(cache.positionLocation);\n    gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0);\n\n    // draw\n    gl.clearColor(0, 0, 0, 0);\n    gl.enable(gl.BLEND);\n    gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA);\n    gl.clear(gl.COLOR_BUFFER_BIT);\n\n    gl.drawArrays(gl.TRIANGLES, 0, 6);\n\n    gl.flush();\n\n    gl.deleteTexture(texture);\n    gl.deleteTexture(maskTexture);\n    gl.deleteBuffer(buffer);\n\n    return canvas;\n  }\n\n  var figuresVertexShaderCode =\n    \"\\\n  attribute vec2 a_position;                                    \\\n  attribute vec3 a_color;                                       \\\n                                                                \\\n  uniform vec2 u_resolution;                                    \\\n  uniform vec2 u_scale;                                         \\\n  uniform vec2 u_offset;                                        \\\n                                                                \\\n  varying vec4 v_color;                                         \\\n                                                                \\\n  void main() {                                                 \\\n    vec2 position = (a_position + u_offset) * u_scale;          \\\n    vec2 clipSpace = (position / u_resolution) * 2.0 - 1.0;     \\\n    gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);          \\\n                                                                \\\n    v_color = vec4(a_color / 255.0, 1.0);                       \\\n  }                                                             \";\n\n  var figuresFragmentShaderCode =\n    \"\\\n  precision mediump float;                                      \\\n                                                                \\\n  varying vec4 v_color;                                         \\\n                                                                \\\n  void main() {                                                 \\\n    gl_FragColor = v_color;                                     \\\n  }                                                             \";\n\n  var figuresCache = null;\n\n  function initFiguresGL() {\n    var canvas, gl;\n\n    generateGL();\n    canvas = currentCanvas;\n    currentCanvas = null;\n    gl = currentGL;\n    currentGL = null;\n\n    // setup a GLSL program\n    var vertexShader = createVertexShader(gl, figuresVertexShaderCode);\n    var fragmentShader = createFragmentShader(gl, figuresFragmentShaderCode);\n    var program = createProgram(gl, [vertexShader, fragmentShader]);\n    gl.useProgram(program);\n\n    var cache = {};\n    cache.gl = gl;\n    cache.canvas = canvas;\n    cache.resolutionLocation = gl.getUniformLocation(program, \"u_resolution\");\n    cache.scaleLocation = gl.getUniformLocation(program, \"u_scale\");\n    cache.offsetLocation = gl.getUniformLocation(program, \"u_offset\");\n    cache.positionLocation = gl.getAttribLocation(program, \"a_position\");\n    cache.colorLocation = gl.getAttribLocation(program, \"a_color\");\n\n    figuresCache = cache;\n  }\n\n  function drawFigures(width, height, backgroundColor, figures, context) {\n    if (!figuresCache) {\n      initFiguresGL();\n    }\n    var cache = figuresCache,\n      canvas = cache.canvas,\n      gl = cache.gl;\n\n    canvas.width = width;\n    canvas.height = height;\n    gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);\n    gl.uniform2f(cache.resolutionLocation, width, height);\n\n    // count triangle points\n    var count = 0;\n    var i, ii, rows;\n    for (i = 0, ii = figures.length; i < ii; i++) {\n      switch (figures[i].type) {\n        case \"lattice\":\n          rows = (figures[i].coords.length / figures[i].verticesPerRow) | 0;\n          count += (rows - 1) * (figures[i].verticesPerRow - 1) * 6;\n          break;\n        case \"triangles\":\n          count += figures[i].coords.length;\n          break;\n      }\n    }\n    // transfer data\n    var coords = new Float32Array(count * 2);\n    var colors = new Uint8Array(count * 3);\n    var coordsMap = context.coords,\n      colorsMap = context.colors;\n    var pIndex = 0,\n      cIndex = 0;\n    for (i = 0, ii = figures.length; i < ii; i++) {\n      var figure = figures[i],\n        ps = figure.coords,\n        cs = figure.colors;\n      switch (figure.type) {\n        case \"lattice\":\n          var cols = figure.verticesPerRow;\n          rows = (ps.length / cols) | 0;\n          for (var row = 1; row < rows; row++) {\n            var offset = row * cols + 1;\n            for (var col = 1; col < cols; col++, offset++) {\n              coords[pIndex] = coordsMap[ps[offset - cols - 1]];\n              coords[pIndex + 1] = coordsMap[ps[offset - cols - 1] + 1];\n              coords[pIndex + 2] = coordsMap[ps[offset - cols]];\n              coords[pIndex + 3] = coordsMap[ps[offset - cols] + 1];\n              coords[pIndex + 4] = coordsMap[ps[offset - 1]];\n              coords[pIndex + 5] = coordsMap[ps[offset - 1] + 1];\n              colors[cIndex] = colorsMap[cs[offset - cols - 1]];\n              colors[cIndex + 1] = colorsMap[cs[offset - cols - 1] + 1];\n              colors[cIndex + 2] = colorsMap[cs[offset - cols - 1] + 2];\n              colors[cIndex + 3] = colorsMap[cs[offset - cols]];\n              colors[cIndex + 4] = colorsMap[cs[offset - cols] + 1];\n              colors[cIndex + 5] = colorsMap[cs[offset - cols] + 2];\n              colors[cIndex + 6] = colorsMap[cs[offset - 1]];\n              colors[cIndex + 7] = colorsMap[cs[offset - 1] + 1];\n              colors[cIndex + 8] = colorsMap[cs[offset - 1] + 2];\n\n              coords[pIndex + 6] = coords[pIndex + 2];\n              coords[pIndex + 7] = coords[pIndex + 3];\n              coords[pIndex + 8] = coords[pIndex + 4];\n              coords[pIndex + 9] = coords[pIndex + 5];\n              coords[pIndex + 10] = coordsMap[ps[offset]];\n              coords[pIndex + 11] = coordsMap[ps[offset] + 1];\n              colors[cIndex + 9] = colors[cIndex + 3];\n              colors[cIndex + 10] = colors[cIndex + 4];\n              colors[cIndex + 11] = colors[cIndex + 5];\n              colors[cIndex + 12] = colors[cIndex + 6];\n              colors[cIndex + 13] = colors[cIndex + 7];\n              colors[cIndex + 14] = colors[cIndex + 8];\n              colors[cIndex + 15] = colorsMap[cs[offset]];\n              colors[cIndex + 16] = colorsMap[cs[offset] + 1];\n              colors[cIndex + 17] = colorsMap[cs[offset] + 2];\n              pIndex += 12;\n              cIndex += 18;\n            }\n          }\n          break;\n        case \"triangles\":\n          for (var j = 0, jj = ps.length; j < jj; j++) {\n            coords[pIndex] = coordsMap[ps[j]];\n            coords[pIndex + 1] = coordsMap[ps[j] + 1];\n            colors[cIndex] = colorsMap[cs[j]];\n            colors[cIndex + 1] = colorsMap[cs[j] + 1];\n            colors[cIndex + 2] = colorsMap[cs[j] + 2];\n            pIndex += 2;\n            cIndex += 3;\n          }\n          break;\n      }\n    }\n\n    // draw\n    if (backgroundColor) {\n      gl.clearColor(\n        backgroundColor[0] / 255,\n        backgroundColor[1] / 255,\n        backgroundColor[2] / 255,\n        1.0\n      );\n    } else {\n      gl.clearColor(0, 0, 0, 0);\n    }\n    gl.clear(gl.COLOR_BUFFER_BIT);\n\n    var coordsBuffer = gl.createBuffer();\n    gl.bindBuffer(gl.ARRAY_BUFFER, coordsBuffer);\n    gl.bufferData(gl.ARRAY_BUFFER, coords, gl.STATIC_DRAW);\n    gl.enableVertexAttribArray(cache.positionLocation);\n    gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0);\n\n    var colorsBuffer = gl.createBuffer();\n    gl.bindBuffer(gl.ARRAY_BUFFER, colorsBuffer);\n    gl.bufferData(gl.ARRAY_BUFFER, colors, gl.STATIC_DRAW);\n    gl.enableVertexAttribArray(cache.colorLocation);\n    gl.vertexAttribPointer(\n      cache.colorLocation,\n      3,\n      gl.UNSIGNED_BYTE,\n      false,\n      0,\n      0\n    );\n\n    gl.uniform2f(cache.scaleLocation, context.scaleX, context.scaleY);\n    gl.uniform2f(cache.offsetLocation, context.offsetX, context.offsetY);\n\n    gl.drawArrays(gl.TRIANGLES, 0, count);\n\n    gl.flush();\n\n    gl.deleteBuffer(coordsBuffer);\n    gl.deleteBuffer(colorsBuffer);\n\n    return canvas;\n  }\n\n  return {\n    tryInitGL() {\n      try {\n        generateGL();\n        return !!currentGL;\n      } catch (ex) {}\n      return false;\n    },\n\n    composeSMask,\n\n    drawFigures,\n\n    cleanup() {\n      if (smaskCache && smaskCache.canvas) {\n        smaskCache.canvas.width = 0;\n        smaskCache.canvas.height = 0;\n      }\n      if (figuresCache && figuresCache.canvas) {\n        figuresCache.canvas.width = 0;\n        figuresCache.canvas.height = 0;\n      }\n      smaskCache = null;\n      figuresCache = null;\n    },\n  };\n})();\n\nexport { WebGLContext };\n","/* Copyright 2015 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport {\n  AbortException,\n  createPromiseCapability,\n  Util,\n} from \"../shared/util.js\";\n\n/**\n * Text layer render parameters.\n *\n * @typedef {Object} TextLayerRenderParameters\n * @property {TextContent} [textContent] - Text content to render (the object\n *   is returned by the page's `getTextContent` method).\n * @property {ReadableStream} [textContentStream] - Text content stream to\n *   render (the stream is returned by the page's `streamTextContent` method).\n * @property {HTMLElement} container - HTML element that will contain text runs.\n * @property {PageViewport} viewport - The target viewport to properly\n *   layout the text runs.\n * @property {Array} [textDivs] - HTML elements that are correspond to the\n *   text items of the textContent input. This is output and shall be\n *   initially be set to empty array.\n * @property {Array} [textContentItemsStr] - Strings that correspond to the\n *   `str` property of the text items of textContent input. This is output\n *   and shall be initially be set to empty array.\n * @property {number} [timeout] - Delay in milliseconds before rendering of the\n *   text runs occurs.\n * @property {boolean} [enhanceTextSelection] - Whether to turn on the text\n *   selection enhancement.\n */\nvar renderTextLayer = (function renderTextLayerClosure() {\n  var MAX_TEXT_DIVS_TO_RENDER = 100000;\n\n  var NonWhitespaceRegexp = /\\S/;\n\n  function isAllWhitespace(str) {\n    return !NonWhitespaceRegexp.test(str);\n  }\n\n  function appendText(task, geom, styles) {\n    // Initialize all used properties to keep the caches monomorphic.\n    var textDiv = document.createElement(\"span\");\n    var textDivProperties = {\n      angle: 0,\n      canvasWidth: 0,\n      isWhitespace: false,\n      originalTransform: null,\n      paddingBottom: 0,\n      paddingLeft: 0,\n      paddingRight: 0,\n      paddingTop: 0,\n      scale: 1,\n    };\n\n    task._textDivs.push(textDiv);\n    if (isAllWhitespace(geom.str)) {\n      textDivProperties.isWhitespace = true;\n      task._textDivProperties.set(textDiv, textDivProperties);\n      return;\n    }\n\n    var tx = Util.transform(task._viewport.transform, geom.transform);\n    var angle = Math.atan2(tx[1], tx[0]);\n    var style = styles[geom.fontName];\n    if (style.vertical) {\n      angle += Math.PI / 2;\n    }\n    var fontHeight = Math.sqrt(tx[2] * tx[2] + tx[3] * tx[3]);\n    var fontAscent = fontHeight;\n    if (style.ascent) {\n      fontAscent = style.ascent * fontAscent;\n    } else if (style.descent) {\n      fontAscent = (1 + style.descent) * fontAscent;\n    }\n\n    let left, top;\n    if (angle === 0) {\n      left = tx[4];\n      top = tx[5] - fontAscent;\n    } else {\n      left = tx[4] + fontAscent * Math.sin(angle);\n      top = tx[5] - fontAscent * Math.cos(angle);\n    }\n    // Setting the style properties individually, rather than all at once,\n    // should be OK since the `textDiv` isn't appended to the document yet.\n    textDiv.style.left = `${left}px`;\n    textDiv.style.top = `${top}px`;\n    textDiv.style.fontSize = `${fontHeight}px`;\n    textDiv.style.fontFamily = style.fontFamily;\n\n    textDiv.textContent = geom.str;\n    // `fontName` is only used by the FontInspector, and we only use `dataset`\n    // here to make the font name available in the debugger.\n    if (task._fontInspectorEnabled) {\n      textDiv.dataset.fontName = geom.fontName;\n    }\n    if (angle !== 0) {\n      textDivProperties.angle = angle * (180 / Math.PI);\n    }\n    // We don't bother scaling single-char text divs, because it has very\n    // little effect on text highlighting. This makes scrolling on docs with\n    // lots of such divs a lot faster.\n    if (geom.str.length > 1) {\n      if (style.vertical) {\n        textDivProperties.canvasWidth = geom.height * task._viewport.scale;\n      } else {\n        textDivProperties.canvasWidth = geom.width * task._viewport.scale;\n      }\n    }\n    task._textDivProperties.set(textDiv, textDivProperties);\n    if (task._textContentStream) {\n      task._layoutText(textDiv);\n    }\n\n    if (task._enhanceTextSelection) {\n      var angleCos = 1,\n        angleSin = 0;\n      if (angle !== 0) {\n        angleCos = Math.cos(angle);\n        angleSin = Math.sin(angle);\n      }\n      var divWidth =\n        (style.vertical ? geom.height : geom.width) * task._viewport.scale;\n      var divHeight = fontHeight;\n\n      var m, b;\n      if (angle !== 0) {\n        m = [angleCos, angleSin, -angleSin, angleCos, left, top];\n        b = Util.getAxialAlignedBoundingBox([0, 0, divWidth, divHeight], m);\n      } else {\n        b = [left, top, left + divWidth, top + divHeight];\n      }\n\n      task._bounds.push({\n        left: b[0],\n        top: b[1],\n        right: b[2],\n        bottom: b[3],\n        div: textDiv,\n        size: [divWidth, divHeight],\n        m,\n      });\n    }\n  }\n\n  function render(task) {\n    if (task._canceled) {\n      return;\n    }\n    var textDivs = task._textDivs;\n    var capability = task._capability;\n    var textDivsLength = textDivs.length;\n\n    // No point in rendering many divs as it would make the browser\n    // unusable even after the divs are rendered.\n    if (textDivsLength > MAX_TEXT_DIVS_TO_RENDER) {\n      task._renderingDone = true;\n      capability.resolve();\n      return;\n    }\n\n    if (!task._textContentStream) {\n      for (var i = 0; i < textDivsLength; i++) {\n        task._layoutText(textDivs[i]);\n      }\n    }\n\n    task._renderingDone = true;\n    capability.resolve();\n  }\n\n  function expand(task) {\n    var bounds = task._bounds;\n    var viewport = task._viewport;\n\n    var expanded = expandBounds(viewport.width, viewport.height, bounds);\n    for (var i = 0; i < expanded.length; i++) {\n      var div = bounds[i].div;\n      var divProperties = task._textDivProperties.get(div);\n      if (divProperties.angle === 0) {\n        divProperties.paddingLeft = bounds[i].left - expanded[i].left;\n        divProperties.paddingTop = bounds[i].top - expanded[i].top;\n        divProperties.paddingRight = expanded[i].right - bounds[i].right;\n        divProperties.paddingBottom = expanded[i].bottom - bounds[i].bottom;\n        task._textDivProperties.set(div, divProperties);\n        continue;\n      }\n      // Box is rotated -- trying to find padding so rotated div will not\n      // exceed its expanded bounds.\n      var e = expanded[i],\n        b = bounds[i];\n      var m = b.m,\n        c = m[0],\n        s = m[1];\n      // Finding intersections with expanded box.\n      var points = [[0, 0], [0, b.size[1]], [b.size[0], 0], b.size];\n      var ts = new Float64Array(64);\n      points.forEach(function(p, i) {\n        var t = Util.applyTransform(p, m);\n        ts[i + 0] = c && (e.left - t[0]) / c;\n        ts[i + 4] = s && (e.top - t[1]) / s;\n        ts[i + 8] = c && (e.right - t[0]) / c;\n        ts[i + 12] = s && (e.bottom - t[1]) / s;\n\n        ts[i + 16] = s && (e.left - t[0]) / -s;\n        ts[i + 20] = c && (e.top - t[1]) / c;\n        ts[i + 24] = s && (e.right - t[0]) / -s;\n        ts[i + 28] = c && (e.bottom - t[1]) / c;\n\n        ts[i + 32] = c && (e.left - t[0]) / -c;\n        ts[i + 36] = s && (e.top - t[1]) / -s;\n        ts[i + 40] = c && (e.right - t[0]) / -c;\n        ts[i + 44] = s && (e.bottom - t[1]) / -s;\n\n        ts[i + 48] = s && (e.left - t[0]) / s;\n        ts[i + 52] = c && (e.top - t[1]) / -c;\n        ts[i + 56] = s && (e.right - t[0]) / s;\n        ts[i + 60] = c && (e.bottom - t[1]) / -c;\n      });\n      var findPositiveMin = function(ts, offset, count) {\n        var result = 0;\n        for (var i = 0; i < count; i++) {\n          var t = ts[offset++];\n          if (t > 0) {\n            result = result ? Math.min(t, result) : t;\n          }\n        }\n        return result;\n      };\n      // Not based on math, but to simplify calculations, using cos and sin\n      // absolute values to not exceed the box (it can but insignificantly).\n      var boxScale = 1 + Math.min(Math.abs(c), Math.abs(s));\n      divProperties.paddingLeft = findPositiveMin(ts, 32, 16) / boxScale;\n      divProperties.paddingTop = findPositiveMin(ts, 48, 16) / boxScale;\n      divProperties.paddingRight = findPositiveMin(ts, 0, 16) / boxScale;\n      divProperties.paddingBottom = findPositiveMin(ts, 16, 16) / boxScale;\n      task._textDivProperties.set(div, divProperties);\n    }\n  }\n\n  function expandBounds(width, height, boxes) {\n    var bounds = boxes.map(function(box, i) {\n      return {\n        x1: box.left,\n        y1: box.top,\n        x2: box.right,\n        y2: box.bottom,\n        index: i,\n        x1New: undefined,\n        x2New: undefined,\n      };\n    });\n    expandBoundsLTR(width, bounds);\n    var expanded = new Array(boxes.length);\n    bounds.forEach(function(b) {\n      var i = b.index;\n      expanded[i] = {\n        left: b.x1New,\n        top: 0,\n        right: b.x2New,\n        bottom: 0,\n      };\n    });\n\n    // Rotating on 90 degrees and extending extended boxes. Reusing the bounds\n    // array and objects.\n    boxes.map(function(box, i) {\n      var e = expanded[i],\n        b = bounds[i];\n      b.x1 = box.top;\n      b.y1 = width - e.right;\n      b.x2 = box.bottom;\n      b.y2 = width - e.left;\n      b.index = i;\n      b.x1New = undefined;\n      b.x2New = undefined;\n    });\n    expandBoundsLTR(height, bounds);\n\n    bounds.forEach(function(b) {\n      var i = b.index;\n      expanded[i].top = b.x1New;\n      expanded[i].bottom = b.x2New;\n    });\n    return expanded;\n  }\n\n  function expandBoundsLTR(width, bounds) {\n    // Sorting by x1 coordinate and walk by the bounds in the same order.\n    bounds.sort(function(a, b) {\n      return a.x1 - b.x1 || a.index - b.index;\n    });\n\n    // First we see on the horizon is a fake boundary.\n    var fakeBoundary = {\n      x1: -Infinity,\n      y1: -Infinity,\n      x2: 0,\n      y2: Infinity,\n      index: -1,\n      x1New: 0,\n      x2New: 0,\n    };\n    var horizon = [\n      {\n        start: -Infinity,\n        end: Infinity,\n        boundary: fakeBoundary,\n      },\n    ];\n\n    bounds.forEach(function(boundary) {\n      // Searching for the affected part of horizon.\n      // TODO red-black tree or simple binary search\n      var i = 0;\n      while (i < horizon.length && horizon[i].end <= boundary.y1) {\n        i++;\n      }\n      var j = horizon.length - 1;\n      while (j >= 0 && horizon[j].start >= boundary.y2) {\n        j--;\n      }\n\n      var horizonPart, affectedBoundary;\n      var q,\n        k,\n        maxXNew = -Infinity;\n      for (q = i; q <= j; q++) {\n        horizonPart = horizon[q];\n        affectedBoundary = horizonPart.boundary;\n        var xNew;\n        if (affectedBoundary.x2 > boundary.x1) {\n          // In the middle of the previous element, new x shall be at the\n          // boundary start. Extending if further if the affected boundary\n          // placed on top of the current one.\n          xNew =\n            affectedBoundary.index > boundary.index\n              ? affectedBoundary.x1New\n              : boundary.x1;\n        } else if (affectedBoundary.x2New === undefined) {\n          // We have some space in between, new x in middle will be a fair\n          // choice.\n          xNew = (affectedBoundary.x2 + boundary.x1) / 2;\n        } else {\n          // Affected boundary has x2new set, using it as new x.\n          xNew = affectedBoundary.x2New;\n        }\n        if (xNew > maxXNew) {\n          maxXNew = xNew;\n        }\n      }\n\n      // Set new x1 for current boundary.\n      boundary.x1New = maxXNew;\n\n      // Adjusts new x2 for the affected boundaries.\n      for (q = i; q <= j; q++) {\n        horizonPart = horizon[q];\n        affectedBoundary = horizonPart.boundary;\n        if (affectedBoundary.x2New === undefined) {\n          // Was not set yet, choosing new x if possible.\n          if (affectedBoundary.x2 > boundary.x1) {\n            // Current and affected boundaries intersect. If affected boundary\n            // is placed on top of the current, shrinking the affected.\n            if (affectedBoundary.index > boundary.index) {\n              affectedBoundary.x2New = affectedBoundary.x2;\n            }\n          } else {\n            affectedBoundary.x2New = maxXNew;\n          }\n        } else if (affectedBoundary.x2New > maxXNew) {\n          // Affected boundary is touching new x, pushing it back.\n          affectedBoundary.x2New = Math.max(maxXNew, affectedBoundary.x2);\n        }\n      }\n\n      // Fixing the horizon.\n      var changedHorizon = [],\n        lastBoundary = null;\n      for (q = i; q <= j; q++) {\n        horizonPart = horizon[q];\n        affectedBoundary = horizonPart.boundary;\n        // Checking which boundary will be visible.\n        var useBoundary =\n          affectedBoundary.x2 > boundary.x2 ? affectedBoundary : boundary;\n        if (lastBoundary === useBoundary) {\n          // Merging with previous.\n          changedHorizon[changedHorizon.length - 1].end = horizonPart.end;\n        } else {\n          changedHorizon.push({\n            start: horizonPart.start,\n            end: horizonPart.end,\n            boundary: useBoundary,\n          });\n          lastBoundary = useBoundary;\n        }\n      }\n      if (horizon[i].start < boundary.y1) {\n        changedHorizon[0].start = boundary.y1;\n        changedHorizon.unshift({\n          start: horizon[i].start,\n          end: boundary.y1,\n          boundary: horizon[i].boundary,\n        });\n      }\n      if (boundary.y2 < horizon[j].end) {\n        changedHorizon[changedHorizon.length - 1].end = boundary.y2;\n        changedHorizon.push({\n          start: boundary.y2,\n          end: horizon[j].end,\n          boundary: horizon[j].boundary,\n        });\n      }\n\n      // Set x2 new of boundary that is no longer visible (see overlapping case\n      // above).\n      // TODO more efficient, e.g. via reference counting.\n      for (q = i; q <= j; q++) {\n        horizonPart = horizon[q];\n        affectedBoundary = horizonPart.boundary;\n        if (affectedBoundary.x2New !== undefined) {\n          continue;\n        }\n        var used = false;\n        for (\n          k = i - 1;\n          !used && k >= 0 && horizon[k].start >= affectedBoundary.y1;\n          k--\n        ) {\n          used = horizon[k].boundary === affectedBoundary;\n        }\n        for (\n          k = j + 1;\n          !used && k < horizon.length && horizon[k].end <= affectedBoundary.y2;\n          k++\n        ) {\n          used = horizon[k].boundary === affectedBoundary;\n        }\n        for (k = 0; !used && k < changedHorizon.length; k++) {\n          used = changedHorizon[k].boundary === affectedBoundary;\n        }\n        if (!used) {\n          affectedBoundary.x2New = maxXNew;\n        }\n      }\n\n      Array.prototype.splice.apply(\n        horizon,\n        [i, j - i + 1].concat(changedHorizon)\n      );\n    });\n\n    // Set new x2 for all unset boundaries.\n    horizon.forEach(function(horizonPart) {\n      var affectedBoundary = horizonPart.boundary;\n      if (affectedBoundary.x2New === undefined) {\n        affectedBoundary.x2New = Math.max(width, affectedBoundary.x2);\n      }\n    });\n  }\n\n  /**\n   * Text layer rendering task.\n   *\n   * @param {TextContent} textContent\n   * @param {HTMLElement} container\n   * @param {PageViewport} viewport\n   * @param {Array} textDivs\n   * @param {boolean} enhanceTextSelection\n   * @private\n   */\n  function TextLayerRenderTask({\n    textContent,\n    textContentStream,\n    container,\n    viewport,\n    textDivs,\n    textContentItemsStr,\n    enhanceTextSelection,\n  }) {\n    this._textContent = textContent;\n    this._textContentStream = textContentStream;\n    this._container = container;\n    this._viewport = viewport;\n    this._textDivs = textDivs || [];\n    this._textContentItemsStr = textContentItemsStr || [];\n    this._enhanceTextSelection = !!enhanceTextSelection;\n    this._fontInspectorEnabled = !!(\n      globalThis.FontInspector && globalThis.FontInspector.enabled\n    );\n\n    this._reader = null;\n    this._layoutTextLastFontSize = null;\n    this._layoutTextLastFontFamily = null;\n    this._layoutTextCtx = null;\n    this._textDivProperties = new WeakMap();\n    this._renderingDone = false;\n    this._canceled = false;\n    this._capability = createPromiseCapability();\n    this._renderTimer = null;\n    this._bounds = [];\n\n    // Always clean-up the temporary canvas once rendering is no longer pending.\n    this._capability.promise\n      .finally(() => {\n        if (this._layoutTextCtx) {\n          // Zeroing the width and height cause Firefox to release graphics\n          // resources immediately, which can greatly reduce memory consumption.\n          this._layoutTextCtx.canvas.width = 0;\n          this._layoutTextCtx.canvas.height = 0;\n          this._layoutTextCtx = null;\n        }\n      })\n      .catch(() => {\n        /* Avoid \"Uncaught promise\" messages in the console. */\n      });\n  }\n  TextLayerRenderTask.prototype = {\n    get promise() {\n      return this._capability.promise;\n    },\n\n    cancel: function TextLayer_cancel() {\n      this._canceled = true;\n      if (this._reader) {\n        this._reader.cancel(new AbortException(\"TextLayer task cancelled.\"));\n        this._reader = null;\n      }\n      if (this._renderTimer !== null) {\n        clearTimeout(this._renderTimer);\n        this._renderTimer = null;\n      }\n      this._capability.reject(new Error(\"TextLayer task cancelled.\"));\n    },\n\n    _processItems(items, styleCache) {\n      for (let i = 0, len = items.length; i < len; i++) {\n        this._textContentItemsStr.push(items[i].str);\n        appendText(this, items[i], styleCache);\n      }\n    },\n\n    _layoutText(textDiv) {\n      const textDivProperties = this._textDivProperties.get(textDiv);\n      if (textDivProperties.isWhitespace) {\n        return;\n      }\n\n      let transform = \"\";\n      if (textDivProperties.canvasWidth !== 0) {\n        const { fontSize, fontFamily } = textDiv.style;\n\n        // Only build font string and set to context if different from last.\n        if (\n          fontSize !== this._layoutTextLastFontSize ||\n          fontFamily !== this._layoutTextLastFontFamily\n        ) {\n          this._layoutTextCtx.font = `${fontSize} ${fontFamily}`;\n          this._layoutTextLastFontSize = fontSize;\n          this._layoutTextLastFontFamily = fontFamily;\n        }\n        // Only measure the width for multi-char text divs, see `appendText`.\n        const { width } = this._layoutTextCtx.measureText(textDiv.textContent);\n\n        if (width > 0) {\n          textDivProperties.scale = textDivProperties.canvasWidth / width;\n          transform = `scaleX(${textDivProperties.scale})`;\n        }\n      }\n      if (textDivProperties.angle !== 0) {\n        transform = `rotate(${textDivProperties.angle}deg) ${transform}`;\n      }\n      if (transform.length > 0) {\n        if (this._enhanceTextSelection) {\n          textDivProperties.originalTransform = transform;\n        }\n        textDiv.style.transform = transform;\n      }\n      this._textDivProperties.set(textDiv, textDivProperties);\n      this._container.appendChild(textDiv);\n    },\n\n    _render: function TextLayer_render(timeout) {\n      const capability = createPromiseCapability();\n      let styleCache = Object.create(null);\n\n      // The temporary canvas is used to measure text length in the DOM.\n      const canvas = document.createElement(\"canvas\");\n      if (\n        typeof PDFJSDev === \"undefined\" ||\n        PDFJSDev.test(\"MOZCENTRAL || GENERIC\")\n      ) {\n        canvas.mozOpaque = true;\n      }\n      this._layoutTextCtx = canvas.getContext(\"2d\", { alpha: false });\n\n      if (this._textContent) {\n        const textItems = this._textContent.items;\n        const textStyles = this._textContent.styles;\n        this._processItems(textItems, textStyles);\n        capability.resolve();\n      } else if (this._textContentStream) {\n        const pump = () => {\n          this._reader.read().then(({ value, done }) => {\n            if (done) {\n              capability.resolve();\n              return;\n            }\n\n            Object.assign(styleCache, value.styles);\n            this._processItems(value.items, styleCache);\n            pump();\n          }, capability.reject);\n        };\n\n        this._reader = this._textContentStream.getReader();\n        pump();\n      } else {\n        throw new Error(\n          'Neither \"textContent\" nor \"textContentStream\"' +\n            \" parameters specified.\"\n        );\n      }\n\n      capability.promise.then(() => {\n        styleCache = null;\n        if (!timeout) {\n          // Render right away\n          render(this);\n        } else {\n          // Schedule\n          this._renderTimer = setTimeout(() => {\n            render(this);\n            this._renderTimer = null;\n          }, timeout);\n        }\n      }, this._capability.reject);\n    },\n\n    expandTextDivs: function TextLayer_expandTextDivs(expandDivs) {\n      if (!this._enhanceTextSelection || !this._renderingDone) {\n        return;\n      }\n      if (this._bounds !== null) {\n        expand(this);\n        this._bounds = null;\n      }\n      const transformBuf = [],\n        paddingBuf = [];\n\n      for (var i = 0, ii = this._textDivs.length; i < ii; i++) {\n        const div = this._textDivs[i];\n        const divProps = this._textDivProperties.get(div);\n\n        if (divProps.isWhitespace) {\n          continue;\n        }\n        if (expandDivs) {\n          transformBuf.length = 0;\n          paddingBuf.length = 0;\n\n          if (divProps.originalTransform) {\n            transformBuf.push(divProps.originalTransform);\n          }\n          if (divProps.paddingTop > 0) {\n            paddingBuf.push(`${divProps.paddingTop}px`);\n            transformBuf.push(`translateY(${-divProps.paddingTop}px)`);\n          } else {\n            paddingBuf.push(0);\n          }\n          if (divProps.paddingRight > 0) {\n            paddingBuf.push(`${divProps.paddingRight / divProps.scale}px`);\n          } else {\n            paddingBuf.push(0);\n          }\n          if (divProps.paddingBottom > 0) {\n            paddingBuf.push(`${divProps.paddingBottom}px`);\n          } else {\n            paddingBuf.push(0);\n          }\n          if (divProps.paddingLeft > 0) {\n            paddingBuf.push(`${divProps.paddingLeft / divProps.scale}px`);\n            transformBuf.push(\n              `translateX(${-divProps.paddingLeft / divProps.scale}px)`\n            );\n          } else {\n            paddingBuf.push(0);\n          }\n\n          div.style.padding = paddingBuf.join(\" \");\n          if (transformBuf.length) {\n            div.style.transform = transformBuf.join(\" \");\n          }\n        } else {\n          div.style.padding = null;\n          div.style.transform = divProps.originalTransform;\n        }\n      }\n    },\n  };\n\n  /**\n   * Starts rendering of the text layer.\n   *\n   * @param {TextLayerRenderParameters} renderParameters\n   * @returns {TextLayerRenderTask}\n   */\n  function renderTextLayer(renderParameters) {\n    var task = new TextLayerRenderTask({\n      textContent: renderParameters.textContent,\n      textContentStream: renderParameters.textContentStream,\n      container: renderParameters.container,\n      viewport: renderParameters.viewport,\n      textDivs: renderParameters.textDivs,\n      textContentItemsStr: renderParameters.textContentItemsStr,\n      enhanceTextSelection: renderParameters.enhanceTextSelection,\n    });\n    task._render(renderParameters.timeout);\n    return task;\n  }\n\n  return renderTextLayer;\n})();\n\nexport { renderTextLayer };\n","/* Copyright 2014 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\nimport {\n  addLinkAttributes,\n  DOMSVGFactory,\n  getFilenameFromUrl,\n  LinkTarget,\n  PDFDateString,\n} from \"./display_utils.js\";\nimport {\n  AnnotationBorderStyleType,\n  AnnotationType,\n  stringToPDFString,\n  unreachable,\n  Util,\n  warn,\n} from \"../shared/util.js\";\n\n/**\n * @typedef {Object} AnnotationElementParameters\n * @property {Object} data\n * @property {HTMLDivElement} layer\n * @property {PDFPage} page\n * @property {PageViewport} viewport\n * @property {IPDFLinkService} linkService\n * @property {DownloadManager} downloadManager\n * @property {string} [imageResourcesPath] - Path for image resources, mainly\n *   for annotation icons. Include trailing slash.\n * @property {boolean} renderInteractiveForms\n * @property {Object} svgFactory\n */\n\nclass AnnotationElementFactory {\n  /**\n   * @param {AnnotationElementParameters} parameters\n   * @returns {AnnotationElement}\n   */\n  static create(parameters) {\n    const subtype = parameters.data.annotationType;\n\n    switch (subtype) {\n      case AnnotationType.LINK:\n        return new LinkAnnotationElement(parameters);\n\n      case AnnotationType.TEXT:\n        return new TextAnnotationElement(parameters);\n\n      case AnnotationType.WIDGET:\n        const fieldType = parameters.data.fieldType;\n\n        switch (fieldType) {\n          case \"Tx\":\n            return new TextWidgetAnnotationElement(parameters);\n          case \"Btn\":\n            if (parameters.data.radioButton) {\n              return new RadioButtonWidgetAnnotationElement(parameters);\n            } else if (parameters.data.checkBox) {\n              return new CheckboxWidgetAnnotationElement(parameters);\n            }\n            return new PushButtonWidgetAnnotationElement(parameters);\n          case \"Ch\":\n            return new ChoiceWidgetAnnotationElement(parameters);\n        }\n        return new WidgetAnnotationElement(parameters);\n\n      case AnnotationType.POPUP:\n        return new PopupAnnotationElement(parameters);\n\n      case AnnotationType.FREETEXT:\n        return new FreeTextAnnotationElement(parameters);\n\n      case AnnotationType.LINE:\n        return new LineAnnotationElement(parameters);\n\n      case AnnotationType.SQUARE:\n        return new SquareAnnotationElement(parameters);\n\n      case AnnotationType.CIRCLE:\n        return new CircleAnnotationElement(parameters);\n\n      case AnnotationType.POLYLINE:\n        return new PolylineAnnotationElement(parameters);\n\n      case AnnotationType.CARET:\n        return new CaretAnnotationElement(parameters);\n\n      case AnnotationType.INK:\n        return new InkAnnotationElement(parameters);\n\n      case AnnotationType.POLYGON:\n        return new PolygonAnnotationElement(parameters);\n\n      case AnnotationType.HIGHLIGHT:\n        return new HighlightAnnotationElement(parameters);\n\n      case AnnotationType.UNDERLINE:\n        return new UnderlineAnnotationElement(parameters);\n\n      case AnnotationType.SQUIGGLY:\n        return new SquigglyAnnotationElement(parameters);\n\n      case AnnotationType.STRIKEOUT:\n        return new StrikeOutAnnotationElement(parameters);\n\n      case AnnotationType.STAMP:\n        return new StampAnnotationElement(parameters);\n\n      case AnnotationType.FILEATTACHMENT:\n        return new FileAttachmentAnnotationElement(parameters);\n\n      default:\n        return new AnnotationElement(parameters);\n    }\n  }\n}\n\nclass AnnotationElement {\n  constructor(parameters, isRenderable = false, ignoreBorder = false) {\n    this.isRenderable = isRenderable;\n    this.data = parameters.data;\n    this.layer = parameters.layer;\n    this.page = parameters.page;\n    this.viewport = parameters.viewport;\n    this.linkService = parameters.linkService;\n    this.downloadManager = parameters.downloadManager;\n    this.imageResourcesPath = parameters.imageResourcesPath;\n    this.renderInteractiveForms = parameters.renderInteractiveForms;\n    this.svgFactory = parameters.svgFactory;\n\n    if (isRenderable) {\n      this.container = this._createContainer(ignoreBorder);\n    }\n  }\n\n  /**\n   * Create an empty container for the annotation's HTML element.\n   *\n   * @private\n   * @param {boolean} ignoreBorder\n   * @memberof AnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  _createContainer(ignoreBorder = false) {\n    const data = this.data,\n      page = this.page,\n      viewport = this.viewport;\n    const container = document.createElement(\"section\");\n    let width = data.rect[2] - data.rect[0];\n    let height = data.rect[3] - data.rect[1];\n\n    container.setAttribute(\"data-annotation-id\", data.id);\n\n    // Do *not* modify `data.rect`, since that will corrupt the annotation\n    // position on subsequent calls to `_createContainer` (see issue 6804).\n    const rect = Util.normalizeRect([\n      data.rect[0],\n      page.view[3] - data.rect[1] + page.view[1],\n      data.rect[2],\n      page.view[3] - data.rect[3] + page.view[1],\n    ]);\n\n    container.style.transform = `matrix(${viewport.transform.join(\",\")})`;\n    container.style.transformOrigin = `-${rect[0]}px -${rect[1]}px`;\n\n    if (!ignoreBorder && data.borderStyle.width > 0) {\n      container.style.borderWidth = `${data.borderStyle.width}px`;\n      if (data.borderStyle.style !== AnnotationBorderStyleType.UNDERLINE) {\n        // Underline styles only have a bottom border, so we do not need\n        // to adjust for all borders. This yields a similar result as\n        // Adobe Acrobat/Reader.\n        width = width - 2 * data.borderStyle.width;\n        height = height - 2 * data.borderStyle.width;\n      }\n\n      const horizontalRadius = data.borderStyle.horizontalCornerRadius;\n      const verticalRadius = data.borderStyle.verticalCornerRadius;\n      if (horizontalRadius > 0 || verticalRadius > 0) {\n        const radius = `${horizontalRadius}px / ${verticalRadius}px`;\n        container.style.borderRadius = radius;\n      }\n\n      switch (data.borderStyle.style) {\n        case AnnotationBorderStyleType.SOLID:\n          container.style.borderStyle = \"solid\";\n          break;\n\n        case AnnotationBorderStyleType.DASHED:\n          container.style.borderStyle = \"dashed\";\n          break;\n\n        case AnnotationBorderStyleType.BEVELED:\n          warn(\"Unimplemented border style: beveled\");\n          break;\n\n        case AnnotationBorderStyleType.INSET:\n          warn(\"Unimplemented border style: inset\");\n          break;\n\n        case AnnotationBorderStyleType.UNDERLINE:\n          container.style.borderBottomStyle = \"solid\";\n          break;\n\n        default:\n          break;\n      }\n\n      if (data.color) {\n        container.style.borderColor = Util.makeCssRgb(\n          data.color[0] | 0,\n          data.color[1] | 0,\n          data.color[2] | 0\n        );\n      } else {\n        // Transparent (invisible) border, so do not draw it at all.\n        container.style.borderWidth = 0;\n      }\n    }\n\n    container.style.left = `${rect[0]}px`;\n    container.style.top = `${rect[1]}px`;\n    container.style.width = `${width}px`;\n    container.style.height = `${height}px`;\n    return container;\n  }\n\n  /**\n   * Create a popup for the annotation's HTML element. This is used for\n   * annotations that do not have a Popup entry in the dictionary, but\n   * are of a type that works with popups (such as Highlight annotations).\n   *\n   * @private\n   * @param {HTMLSectionElement} container\n   * @param {HTMLDivElement|HTMLImageElement|null} trigger\n   * @param {Object} data\n   * @memberof AnnotationElement\n   */\n  _createPopup(container, trigger, data) {\n    // If no trigger element is specified, create it.\n    if (!trigger) {\n      trigger = document.createElement(\"div\");\n      trigger.style.height = container.style.height;\n      trigger.style.width = container.style.width;\n      container.appendChild(trigger);\n    }\n\n    const popupElement = new PopupElement({\n      container,\n      trigger,\n      color: data.color,\n      title: data.title,\n      modificationDate: data.modificationDate,\n      contents: data.contents,\n      hideWrapper: true,\n    });\n    const popup = popupElement.render();\n\n    // Position the popup next to the annotation's container.\n    popup.style.left = container.style.width;\n\n    container.appendChild(popup);\n  }\n\n  /**\n   * Render the annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof AnnotationElement\n   */\n  render() {\n    unreachable(\"Abstract method `AnnotationElement.render` called\");\n  }\n}\n\nclass LinkAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.url ||\n      parameters.data.dest ||\n      parameters.data.action\n    );\n    super(parameters, isRenderable);\n  }\n\n  /**\n   * Render the link annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof LinkAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"linkAnnotation\";\n\n    const { data, linkService } = this;\n    const link = document.createElement(\"a\");\n\n    if (data.url) {\n      addLinkAttributes(link, {\n        url: data.url,\n        target: data.newWindow\n          ? LinkTarget.BLANK\n          : linkService.externalLinkTarget,\n        rel: linkService.externalLinkRel,\n        enabled: linkService.externalLinkEnabled,\n      });\n    } else if (data.action) {\n      this._bindNamedAction(link, data.action);\n    } else {\n      this._bindLink(link, data.dest);\n    }\n\n    this.container.appendChild(link);\n    return this.container;\n  }\n\n  /**\n   * Bind internal links to the link element.\n   *\n   * @private\n   * @param {Object} link\n   * @param {Object} destination\n   * @memberof LinkAnnotationElement\n   */\n  _bindLink(link, destination) {\n    link.href = this.linkService.getDestinationHash(destination);\n    link.onclick = () => {\n      if (destination) {\n        this.linkService.navigateTo(destination);\n      }\n      return false;\n    };\n    if (destination) {\n      link.className = \"internalLink\";\n    }\n  }\n\n  /**\n   * Bind named actions to the link element.\n   *\n   * @private\n   * @param {Object} link\n   * @param {Object} action\n   * @memberof LinkAnnotationElement\n   */\n  _bindNamedAction(link, action) {\n    link.href = this.linkService.getAnchorUrl(\"\");\n    link.onclick = () => {\n      this.linkService.executeNamedAction(action);\n      return false;\n    };\n    link.className = \"internalLink\";\n  }\n}\n\nclass TextAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable);\n  }\n\n  /**\n   * Render the text annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof TextAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"textAnnotation\";\n\n    const image = document.createElement(\"img\");\n    image.style.height = this.container.style.height;\n    image.style.width = this.container.style.width;\n    image.src =\n      this.imageResourcesPath +\n      \"annotation-\" +\n      this.data.name.toLowerCase() +\n      \".svg\";\n    image.alt = \"[{{type}} Annotation]\";\n    image.dataset.l10nId = \"text_annotation_type\";\n    image.dataset.l10nArgs = JSON.stringify({ type: this.data.name });\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, image, this.data);\n    }\n\n    this.container.appendChild(image);\n    return this.container;\n  }\n}\n\nclass WidgetAnnotationElement extends AnnotationElement {\n  /**\n   * Render the widget annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof WidgetAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    // Show only the container for unsupported field types.\n    return this.container;\n  }\n}\n\nclass TextWidgetAnnotationElement extends WidgetAnnotationElement {\n  constructor(parameters) {\n    const isRenderable =\n      parameters.renderInteractiveForms ||\n      (!parameters.data.hasAppearance && !!parameters.data.fieldValue);\n    super(parameters, isRenderable);\n  }\n\n  /**\n   * Render the text widget annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof TextWidgetAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    const TEXT_ALIGNMENT = [\"left\", \"center\", \"right\"];\n\n    this.container.className = \"textWidgetAnnotation\";\n\n    let element = null;\n    if (this.renderInteractiveForms) {\n      // NOTE: We cannot set the values using `element.value` below, since it\n      //       prevents the AnnotationLayer rasterizer in `test/driver.js`\n      //       from parsing the elements correctly for the reference tests.\n      if (this.data.multiLine) {\n        element = document.createElement(\"textarea\");\n        element.textContent = this.data.fieldValue;\n      } else {\n        element = document.createElement(\"input\");\n        element.type = \"text\";\n        element.setAttribute(\"value\", this.data.fieldValue);\n      }\n\n      element.disabled = this.data.readOnly;\n\n      if (this.data.maxLen !== null) {\n        element.maxLength = this.data.maxLen;\n      }\n\n      if (this.data.comb) {\n        const fieldWidth = this.data.rect[2] - this.data.rect[0];\n        const combWidth = fieldWidth / this.data.maxLen;\n\n        element.classList.add(\"comb\");\n        element.style.letterSpacing = `calc(${combWidth}px - 1ch)`;\n      }\n    } else {\n      element = document.createElement(\"div\");\n      element.textContent = this.data.fieldValue;\n      element.style.verticalAlign = \"middle\";\n      element.style.display = \"table-cell\";\n\n      let font = null;\n      if (\n        this.data.fontRefName &&\n        this.page.commonObjs.has(this.data.fontRefName)\n      ) {\n        font = this.page.commonObjs.get(this.data.fontRefName);\n      }\n      this._setTextStyle(element, font);\n    }\n\n    if (this.data.textAlignment !== null) {\n      element.style.textAlign = TEXT_ALIGNMENT[this.data.textAlignment];\n    }\n\n    this.container.appendChild(element);\n    return this.container;\n  }\n\n  /**\n   * Apply text styles to the text in the element.\n   *\n   * @private\n   * @param {HTMLDivElement} element\n   * @param {Object} font\n   * @memberof TextWidgetAnnotationElement\n   */\n  _setTextStyle(element, font) {\n    // TODO: This duplicates some of the logic in CanvasGraphics.setFont().\n    const style = element.style;\n    style.fontSize = `${this.data.fontSize}px`;\n    style.direction = this.data.fontDirection < 0 ? \"rtl\" : \"ltr\";\n\n    if (!font) {\n      return;\n    }\n\n    let bold = \"normal\";\n    if (font.black) {\n      bold = \"900\";\n    } else if (font.bold) {\n      bold = \"bold\";\n    }\n    style.fontWeight = bold;\n    style.fontStyle = font.italic ? \"italic\" : \"normal\";\n\n    // Use a reasonable default font if the font doesn't specify a fallback.\n    const fontFamily = font.loadedName ? `\"${font.loadedName}\", ` : \"\";\n    const fallbackName = font.fallbackName || \"Helvetica, sans-serif\";\n    style.fontFamily = fontFamily + fallbackName;\n  }\n}\n\nclass CheckboxWidgetAnnotationElement extends WidgetAnnotationElement {\n  constructor(parameters) {\n    super(parameters, parameters.renderInteractiveForms);\n  }\n\n  /**\n   * Render the checkbox widget annotation's HTML element\n   * in the empty container.\n   *\n   * @public\n   * @memberof CheckboxWidgetAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"buttonWidgetAnnotation checkBox\";\n\n    const element = document.createElement(\"input\");\n    element.disabled = this.data.readOnly;\n    element.type = \"checkbox\";\n    if (this.data.fieldValue && this.data.fieldValue !== \"Off\") {\n      element.setAttribute(\"checked\", true);\n    }\n\n    this.container.appendChild(element);\n    return this.container;\n  }\n}\n\nclass RadioButtonWidgetAnnotationElement extends WidgetAnnotationElement {\n  constructor(parameters) {\n    super(parameters, parameters.renderInteractiveForms);\n  }\n\n  /**\n   * Render the radio button widget annotation's HTML element\n   * in the empty container.\n   *\n   * @public\n   * @memberof RadioButtonWidgetAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"buttonWidgetAnnotation radioButton\";\n\n    const element = document.createElement(\"input\");\n    element.disabled = this.data.readOnly;\n    element.type = \"radio\";\n    element.name = this.data.fieldName;\n    if (this.data.fieldValue === this.data.buttonValue) {\n      element.setAttribute(\"checked\", true);\n    }\n\n    this.container.appendChild(element);\n    return this.container;\n  }\n}\n\nclass PushButtonWidgetAnnotationElement extends LinkAnnotationElement {\n  /**\n   * Render the push button widget annotation's HTML element\n   * in the empty container.\n   *\n   * @public\n   * @memberof PushButtonWidgetAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    // The rendering and functionality of a push button widget annotation is\n    // equal to that of a link annotation, but may have more functionality, such\n    // as performing actions on form fields (resetting, submitting, et cetera).\n    const container = super.render();\n    container.className = \"buttonWidgetAnnotation pushButton\";\n    return container;\n  }\n}\n\nclass ChoiceWidgetAnnotationElement extends WidgetAnnotationElement {\n  constructor(parameters) {\n    super(parameters, parameters.renderInteractiveForms);\n  }\n\n  /**\n   * Render the choice widget annotation's HTML element in the empty\n   * container.\n   *\n   * @public\n   * @memberof ChoiceWidgetAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"choiceWidgetAnnotation\";\n\n    const selectElement = document.createElement(\"select\");\n    selectElement.disabled = this.data.readOnly;\n\n    if (!this.data.combo) {\n      // List boxes have a size and (optionally) multiple selection.\n      selectElement.size = this.data.options.length;\n      if (this.data.multiSelect) {\n        selectElement.multiple = true;\n      }\n    }\n\n    // Insert the options into the choice field.\n    for (const option of this.data.options) {\n      const optionElement = document.createElement(\"option\");\n      optionElement.textContent = option.displayValue;\n      optionElement.value = option.exportValue;\n      if (this.data.fieldValue.includes(option.displayValue)) {\n        optionElement.setAttribute(\"selected\", true);\n      }\n      selectElement.appendChild(optionElement);\n    }\n\n    this.container.appendChild(selectElement);\n    return this.container;\n  }\n}\n\nclass PopupAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(parameters.data.title || parameters.data.contents);\n    super(parameters, isRenderable);\n  }\n\n  /**\n   * Render the popup annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof PopupAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    // Do not render popup annotations for parent elements with these types as\n    // they create the popups themselves (because of custom trigger divs).\n    const IGNORE_TYPES = [\n      \"Line\",\n      \"Square\",\n      \"Circle\",\n      \"PolyLine\",\n      \"Polygon\",\n      \"Ink\",\n    ];\n\n    this.container.className = \"popupAnnotation\";\n\n    if (IGNORE_TYPES.includes(this.data.parentType)) {\n      return this.container;\n    }\n\n    const selector = `[data-annotation-id=\"${this.data.parentId}\"]`;\n    const parentElement = this.layer.querySelector(selector);\n    if (!parentElement) {\n      return this.container;\n    }\n\n    const popup = new PopupElement({\n      container: this.container,\n      trigger: parentElement,\n      color: this.data.color,\n      title: this.data.title,\n      modificationDate: this.data.modificationDate,\n      contents: this.data.contents,\n    });\n\n    // Position the popup next to the parent annotation's container.\n    // PDF viewers ignore a popup annotation's rectangle.\n    const parentLeft = parseFloat(parentElement.style.left);\n    const parentWidth = parseFloat(parentElement.style.width);\n    this.container.style.transformOrigin = `-${parentLeft + parentWidth}px -${\n      parentElement.style.top\n    }`;\n    this.container.style.left = `${parentLeft + parentWidth}px`;\n\n    this.container.appendChild(popup.render());\n    return this.container;\n  }\n}\n\nclass PopupElement {\n  constructor(parameters) {\n    this.container = parameters.container;\n    this.trigger = parameters.trigger;\n    this.color = parameters.color;\n    this.title = parameters.title;\n    this.modificationDate = parameters.modificationDate;\n    this.contents = parameters.contents;\n    this.hideWrapper = parameters.hideWrapper || false;\n\n    this.pinned = false;\n  }\n\n  /**\n   * Render the popup's HTML element.\n   *\n   * @public\n   * @memberof PopupElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    const BACKGROUND_ENLIGHT = 0.7;\n\n    const wrapper = document.createElement(\"div\");\n    wrapper.className = \"popupWrapper\";\n\n    // For Popup annotations we hide the entire section because it contains\n    // only the popup. However, for Text annotations without a separate Popup\n    // annotation, we cannot hide the entire container as the image would\n    // disappear too. In that special case, hiding the wrapper suffices.\n    this.hideElement = this.hideWrapper ? wrapper : this.container;\n    this.hideElement.setAttribute(\"hidden\", true);\n\n    const popup = document.createElement(\"div\");\n    popup.className = \"popup\";\n\n    const color = this.color;\n    if (color) {\n      // Enlighten the color.\n      const r = BACKGROUND_ENLIGHT * (255 - color[0]) + color[0];\n      const g = BACKGROUND_ENLIGHT * (255 - color[1]) + color[1];\n      const b = BACKGROUND_ENLIGHT * (255 - color[2]) + color[2];\n      popup.style.backgroundColor = Util.makeCssRgb(r | 0, g | 0, b | 0);\n    }\n\n    const title = document.createElement(\"h1\");\n    title.textContent = this.title;\n    popup.appendChild(title);\n\n    // The modification date is shown in the popup instead of the creation\n    // date if it is available and can be parsed correctly, which is\n    // consistent with other viewers such as Adobe Acrobat.\n    const dateObject = PDFDateString.toDateObject(this.modificationDate);\n    if (dateObject) {\n      const modificationDate = document.createElement(\"span\");\n      modificationDate.textContent = \"{{date}}, {{time}}\";\n      modificationDate.dataset.l10nId = \"annotation_date_string\";\n      modificationDate.dataset.l10nArgs = JSON.stringify({\n        date: dateObject.toLocaleDateString(),\n        time: dateObject.toLocaleTimeString(),\n      });\n      popup.appendChild(modificationDate);\n    }\n\n    const contents = this._formatContents(this.contents);\n    popup.appendChild(contents);\n\n    // Attach the event listeners to the trigger element.\n    this.trigger.addEventListener(\"click\", this._toggle.bind(this));\n    this.trigger.addEventListener(\"mouseover\", this._show.bind(this, false));\n    this.trigger.addEventListener(\"mouseout\", this._hide.bind(this, false));\n    popup.addEventListener(\"click\", this._hide.bind(this, true));\n\n    wrapper.appendChild(popup);\n    return wrapper;\n  }\n\n  /**\n   * Format the contents of the popup by adding newlines where necessary.\n   *\n   * @private\n   * @param {string} contents\n   * @memberof PopupElement\n   * @returns {HTMLParagraphElement}\n   */\n  _formatContents(contents) {\n    const p = document.createElement(\"p\");\n    const lines = contents.split(/(?:\\r\\n?|\\n)/);\n    for (let i = 0, ii = lines.length; i < ii; ++i) {\n      const line = lines[i];\n      p.appendChild(document.createTextNode(line));\n      if (i < ii - 1) {\n        p.appendChild(document.createElement(\"br\"));\n      }\n    }\n    return p;\n  }\n\n  /**\n   * Toggle the visibility of the popup.\n   *\n   * @private\n   * @memberof PopupElement\n   */\n  _toggle() {\n    if (this.pinned) {\n      this._hide(true);\n    } else {\n      this._show(true);\n    }\n  }\n\n  /**\n   * Show the popup.\n   *\n   * @private\n   * @param {boolean} pin\n   * @memberof PopupElement\n   */\n  _show(pin = false) {\n    if (pin) {\n      this.pinned = true;\n    }\n    if (this.hideElement.hasAttribute(\"hidden\")) {\n      this.hideElement.removeAttribute(\"hidden\");\n      this.container.style.zIndex += 1;\n    }\n  }\n\n  /**\n   * Hide the popup.\n   *\n   * @private\n   * @param {boolean} unpin\n   * @memberof PopupElement\n   */\n  _hide(unpin = true) {\n    if (unpin) {\n      this.pinned = false;\n    }\n    if (!this.hideElement.hasAttribute(\"hidden\") && !this.pinned) {\n      this.hideElement.setAttribute(\"hidden\", true);\n      this.container.style.zIndex -= 1;\n    }\n  }\n}\n\nclass FreeTextAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the free text annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof FreeTextAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"freeTextAnnotation\";\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, null, this.data);\n    }\n    return this.container;\n  }\n}\n\nclass LineAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the line annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof LineAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"lineAnnotation\";\n\n    // Create an invisible line with the same starting and ending coordinates\n    // that acts as the trigger for the popup. Only the line itself should\n    // trigger the popup, not the entire container.\n    const data = this.data;\n    const width = data.rect[2] - data.rect[0];\n    const height = data.rect[3] - data.rect[1];\n    const svg = this.svgFactory.create(width, height);\n\n    // PDF coordinates are calculated from a bottom left origin, so transform\n    // the line coordinates to a top left origin for the SVG element.\n    const line = this.svgFactory.createElement(\"svg:line\");\n    line.setAttribute(\"x1\", data.rect[2] - data.lineCoordinates[0]);\n    line.setAttribute(\"y1\", data.rect[3] - data.lineCoordinates[1]);\n    line.setAttribute(\"x2\", data.rect[2] - data.lineCoordinates[2]);\n    line.setAttribute(\"y2\", data.rect[3] - data.lineCoordinates[3]);\n    // Ensure that the 'stroke-width' is always non-zero, since otherwise it\n    // won't be possible to open/close the popup (note e.g. issue 11122).\n    line.setAttribute(\"stroke-width\", data.borderStyle.width || 1);\n    line.setAttribute(\"stroke\", \"transparent\");\n\n    svg.appendChild(line);\n    this.container.append(svg);\n\n    // Create the popup ourselves so that we can bind it to the line instead\n    // of to the entire container (which is the default).\n    this._createPopup(this.container, line, data);\n\n    return this.container;\n  }\n}\n\nclass SquareAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the square annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof SquareAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"squareAnnotation\";\n\n    // Create an invisible square with the same rectangle that acts as the\n    // trigger for the popup. Only the square itself should trigger the\n    // popup, not the entire container.\n    const data = this.data;\n    const width = data.rect[2] - data.rect[0];\n    const height = data.rect[3] - data.rect[1];\n    const svg = this.svgFactory.create(width, height);\n\n    // The browser draws half of the borders inside the square and half of\n    // the borders outside the square by default. This behavior cannot be\n    // changed programmatically, so correct for that here.\n    const borderWidth = data.borderStyle.width;\n    const square = this.svgFactory.createElement(\"svg:rect\");\n    square.setAttribute(\"x\", borderWidth / 2);\n    square.setAttribute(\"y\", borderWidth / 2);\n    square.setAttribute(\"width\", width - borderWidth);\n    square.setAttribute(\"height\", height - borderWidth);\n    // Ensure that the 'stroke-width' is always non-zero, since otherwise it\n    // won't be possible to open/close the popup (note e.g. issue 11122).\n    square.setAttribute(\"stroke-width\", borderWidth || 1);\n    square.setAttribute(\"stroke\", \"transparent\");\n    square.setAttribute(\"fill\", \"none\");\n\n    svg.appendChild(square);\n    this.container.append(svg);\n\n    // Create the popup ourselves so that we can bind it to the square instead\n    // of to the entire container (which is the default).\n    this._createPopup(this.container, square, data);\n\n    return this.container;\n  }\n}\n\nclass CircleAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the circle annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof CircleAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"circleAnnotation\";\n\n    // Create an invisible circle with the same ellipse that acts as the\n    // trigger for the popup. Only the circle itself should trigger the\n    // popup, not the entire container.\n    const data = this.data;\n    const width = data.rect[2] - data.rect[0];\n    const height = data.rect[3] - data.rect[1];\n    const svg = this.svgFactory.create(width, height);\n\n    // The browser draws half of the borders inside the circle and half of\n    // the borders outside the circle by default. This behavior cannot be\n    // changed programmatically, so correct for that here.\n    const borderWidth = data.borderStyle.width;\n    const circle = this.svgFactory.createElement(\"svg:ellipse\");\n    circle.setAttribute(\"cx\", width / 2);\n    circle.setAttribute(\"cy\", height / 2);\n    circle.setAttribute(\"rx\", width / 2 - borderWidth / 2);\n    circle.setAttribute(\"ry\", height / 2 - borderWidth / 2);\n    // Ensure that the 'stroke-width' is always non-zero, since otherwise it\n    // won't be possible to open/close the popup (note e.g. issue 11122).\n    circle.setAttribute(\"stroke-width\", borderWidth || 1);\n    circle.setAttribute(\"stroke\", \"transparent\");\n    circle.setAttribute(\"fill\", \"none\");\n\n    svg.appendChild(circle);\n    this.container.append(svg);\n\n    // Create the popup ourselves so that we can bind it to the circle instead\n    // of to the entire container (which is the default).\n    this._createPopup(this.container, circle, data);\n\n    return this.container;\n  }\n}\n\nclass PolylineAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n\n    this.containerClassName = \"polylineAnnotation\";\n    this.svgElementName = \"svg:polyline\";\n  }\n\n  /**\n   * Render the polyline annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof PolylineAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = this.containerClassName;\n\n    // Create an invisible polyline with the same points that acts as the\n    // trigger for the popup. Only the polyline itself should trigger the\n    // popup, not the entire container.\n    const data = this.data;\n    const width = data.rect[2] - data.rect[0];\n    const height = data.rect[3] - data.rect[1];\n    const svg = this.svgFactory.create(width, height);\n\n    // Convert the vertices array to a single points string that the SVG\n    // polyline element expects (\"x1,y1 x2,y2 ...\"). PDF coordinates are\n    // calculated from a bottom left origin, so transform the polyline\n    // coordinates to a top left origin for the SVG element.\n    let points = [];\n    for (const coordinate of data.vertices) {\n      const x = coordinate.x - data.rect[0];\n      const y = data.rect[3] - coordinate.y;\n      points.push(x + \",\" + y);\n    }\n    points = points.join(\" \");\n\n    const polyline = this.svgFactory.createElement(this.svgElementName);\n    polyline.setAttribute(\"points\", points);\n    // Ensure that the 'stroke-width' is always non-zero, since otherwise it\n    // won't be possible to open/close the popup (note e.g. issue 11122).\n    polyline.setAttribute(\"stroke-width\", data.borderStyle.width || 1);\n    polyline.setAttribute(\"stroke\", \"transparent\");\n    polyline.setAttribute(\"fill\", \"none\");\n\n    svg.appendChild(polyline);\n    this.container.append(svg);\n\n    // Create the popup ourselves so that we can bind it to the polyline\n    // instead of to the entire container (which is the default).\n    this._createPopup(this.container, polyline, data);\n\n    return this.container;\n  }\n}\n\nclass PolygonAnnotationElement extends PolylineAnnotationElement {\n  constructor(parameters) {\n    // Polygons are specific forms of polylines, so reuse their logic.\n    super(parameters);\n\n    this.containerClassName = \"polygonAnnotation\";\n    this.svgElementName = \"svg:polygon\";\n  }\n}\n\nclass CaretAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the caret annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof CaretAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"caretAnnotation\";\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, null, this.data);\n    }\n    return this.container;\n  }\n}\n\nclass InkAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n\n    this.containerClassName = \"inkAnnotation\";\n\n    // Use the polyline SVG element since it allows us to use coordinates\n    // directly and to draw both straight lines and curves.\n    this.svgElementName = \"svg:polyline\";\n  }\n\n  /**\n   * Render the ink annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof InkAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = this.containerClassName;\n\n    // Create an invisible polyline with the same points that acts as the\n    // trigger for the popup.\n    const data = this.data;\n    const width = data.rect[2] - data.rect[0];\n    const height = data.rect[3] - data.rect[1];\n    const svg = this.svgFactory.create(width, height);\n\n    for (const inkList of data.inkLists) {\n      // Convert the ink list to a single points string that the SVG\n      // polyline element expects (\"x1,y1 x2,y2 ...\"). PDF coordinates are\n      // calculated from a bottom left origin, so transform the polyline\n      // coordinates to a top left origin for the SVG element.\n      let points = [];\n      for (const coordinate of inkList) {\n        const x = coordinate.x - data.rect[0];\n        const y = data.rect[3] - coordinate.y;\n        points.push(`${x},${y}`);\n      }\n      points = points.join(\" \");\n\n      const polyline = this.svgFactory.createElement(this.svgElementName);\n      polyline.setAttribute(\"points\", points);\n      // Ensure that the 'stroke-width' is always non-zero, since otherwise it\n      // won't be possible to open/close the popup (note e.g. issue 11122).\n      polyline.setAttribute(\"stroke-width\", data.borderStyle.width || 1);\n      polyline.setAttribute(\"stroke\", \"transparent\");\n      polyline.setAttribute(\"fill\", \"none\");\n\n      // Create the popup ourselves so that we can bind it to the polyline\n      // instead of to the entire container (which is the default).\n      this._createPopup(this.container, polyline, data);\n\n      svg.appendChild(polyline);\n    }\n\n    this.container.append(svg);\n    return this.container;\n  }\n}\n\nclass HighlightAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the highlight annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof HighlightAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"highlightAnnotation\";\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, null, this.data);\n    }\n    return this.container;\n  }\n}\n\nclass UnderlineAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the underline annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof UnderlineAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"underlineAnnotation\";\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, null, this.data);\n    }\n    return this.container;\n  }\n}\n\nclass SquigglyAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the squiggly annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof SquigglyAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"squigglyAnnotation\";\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, null, this.data);\n    }\n    return this.container;\n  }\n}\n\nclass StrikeOutAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the strikeout annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof StrikeOutAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"strikeoutAnnotation\";\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, null, this.data);\n    }\n    return this.container;\n  }\n}\n\nclass StampAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    const isRenderable = !!(\n      parameters.data.hasPopup ||\n      parameters.data.title ||\n      parameters.data.contents\n    );\n    super(parameters, isRenderable, /* ignoreBorder = */ true);\n  }\n\n  /**\n   * Render the stamp annotation's HTML element in the empty container.\n   *\n   * @public\n   * @memberof StampAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"stampAnnotation\";\n\n    if (!this.data.hasPopup) {\n      this._createPopup(this.container, null, this.data);\n    }\n    return this.container;\n  }\n}\n\nclass FileAttachmentAnnotationElement extends AnnotationElement {\n  constructor(parameters) {\n    super(parameters, /* isRenderable = */ true);\n\n    const { filename, content } = this.data.file;\n    this.filename = getFilenameFromUrl(filename);\n    this.content = content;\n\n    if (this.linkService.eventBus) {\n      this.linkService.eventBus.dispatch(\"fileattachmentannotation\", {\n        source: this,\n        id: stringToPDFString(filename),\n        filename,\n        content,\n      });\n    }\n  }\n\n  /**\n   * Render the file attachment annotation's HTML element in the empty\n   * container.\n   *\n   * @public\n   * @memberof FileAttachmentAnnotationElement\n   * @returns {HTMLSectionElement}\n   */\n  render() {\n    this.container.className = \"fileAttachmentAnnotation\";\n\n    const trigger = document.createElement(\"div\");\n    trigger.style.height = this.container.style.height;\n    trigger.style.width = this.container.style.width;\n    trigger.addEventListener(\"dblclick\", this._download.bind(this));\n\n    if (!this.data.hasPopup && (this.data.title || this.data.contents)) {\n      this._createPopup(this.container, trigger, this.data);\n    }\n\n    this.container.appendChild(trigger);\n    return this.container;\n  }\n\n  /**\n   * Download the file attachment associated with this annotation.\n   *\n   * @private\n   * @memberof FileAttachmentAnnotationElement\n   */\n  _download() {\n    if (!this.downloadManager) {\n      warn(\"Download cannot be started due to unavailable download manager\");\n      return;\n    }\n    this.downloadManager.downloadData(this.content, this.filename, \"\");\n  }\n}\n\n/**\n * @typedef {Object} AnnotationLayerParameters\n * @property {PageViewport} viewport\n * @property {HTMLDivElement} div\n * @property {Array} annotations\n * @property {PDFPage} page\n * @property {IPDFLinkService} linkService\n * @property {DownloadManager} downloadManager\n * @property {string} [imageResourcesPath] - Path for image resources, mainly\n *   for annotation icons. Include trailing slash.\n * @property {boolean} renderInteractiveForms\n */\n\nclass AnnotationLayer {\n  /**\n   * Render a new annotation layer with all annotation elements.\n   *\n   * @public\n   * @param {AnnotationLayerParameters} parameters\n   * @memberof AnnotationLayer\n   */\n  static render(parameters) {\n    const sortedAnnotations = [],\n      popupAnnotations = [];\n    // Ensure that Popup annotations are handled last, since they're dependant\n    // upon the parent annotation having already been rendered (please refer to\n    // the `PopupAnnotationElement.render` method); fixes issue 11362.\n    for (const data of parameters.annotations) {\n      if (!data) {\n        continue;\n      }\n      if (data.annotationType === AnnotationType.POPUP) {\n        popupAnnotations.push(data);\n        continue;\n      }\n      sortedAnnotations.push(data);\n    }\n    if (popupAnnotations.length) {\n      sortedAnnotations.push(...popupAnnotations);\n    }\n\n    for (const data of sortedAnnotations) {\n      const element = AnnotationElementFactory.create({\n        data,\n        layer: parameters.div,\n        page: parameters.page,\n        viewport: parameters.viewport,\n        linkService: parameters.linkService,\n        downloadManager: parameters.downloadManager,\n        imageResourcesPath: parameters.imageResourcesPath || \"\",\n        renderInteractiveForms: parameters.renderInteractiveForms || false,\n        svgFactory: new DOMSVGFactory(),\n      });\n      if (element.isRenderable) {\n        parameters.div.appendChild(element.render());\n      }\n    }\n  }\n\n  /**\n   * Update the annotation elements on existing annotation layer.\n   *\n   * @public\n   * @param {AnnotationLayerParameters} parameters\n   * @memberof AnnotationLayer\n   */\n  static update(parameters) {\n    for (const data of parameters.annotations) {\n      const element = parameters.div.querySelector(\n        `[data-annotation-id=\"${data.id}\"]`\n      );\n      if (element) {\n        element.style.transform = `matrix(${parameters.viewport.transform.join(\n          \",\"\n        )})`;\n      }\n    }\n    parameters.div.removeAttribute(\"hidden\");\n  }\n}\n\nexport { AnnotationLayer };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* globals __non_webpack_require__ */\n/* eslint no-var: error */\n\nimport {\n  createObjectURL,\n  FONT_IDENTITY_MATRIX,\n  IDENTITY_MATRIX,\n  ImageKind,\n  isNum,\n  OPS,\n  TextRenderingMode,\n  Util,\n  warn,\n} from \"../shared/util.js\";\nimport { DOMSVGFactory } from \"./display_utils.js\";\nimport { isNodeJS } from \"../shared/is_node.js\";\n\nlet SVGGraphics = function() {\n  throw new Error(\"Not implemented: SVGGraphics\");\n};\n\nif (typeof PDFJSDev === \"undefined\" || PDFJSDev.test(\"GENERIC\")) {\n  const SVG_DEFAULTS = {\n    fontStyle: \"normal\",\n    fontWeight: \"normal\",\n    fillColor: \"#000000\",\n  };\n  const XML_NS = \"http://www.w3.org/XML/1998/namespace\";\n  const XLINK_NS = \"http://www.w3.org/1999/xlink\";\n  const LINE_CAP_STYLES = [\"butt\", \"round\", \"square\"];\n  const LINE_JOIN_STYLES = [\"miter\", \"round\", \"bevel\"];\n\n  const convertImgDataToPng = (function() {\n    const PNG_HEADER = new Uint8Array([\n      0x89,\n      0x50,\n      0x4e,\n      0x47,\n      0x0d,\n      0x0a,\n      0x1a,\n      0x0a,\n    ]);\n    const CHUNK_WRAPPER_SIZE = 12;\n\n    const crcTable = new Int32Array(256);\n    for (let i = 0; i < 256; i++) {\n      let c = i;\n      for (let h = 0; h < 8; h++) {\n        if (c & 1) {\n          c = 0xedb88320 ^ ((c >> 1) & 0x7fffffff);\n        } else {\n          c = (c >> 1) & 0x7fffffff;\n        }\n      }\n      crcTable[i] = c;\n    }\n\n    function crc32(data, start, end) {\n      let crc = -1;\n      for (let i = start; i < end; i++) {\n        const a = (crc ^ data[i]) & 0xff;\n        const b = crcTable[a];\n        crc = (crc >>> 8) ^ b;\n      }\n      return crc ^ -1;\n    }\n\n    function writePngChunk(type, body, data, offset) {\n      let p = offset;\n      const len = body.length;\n\n      data[p] = (len >> 24) & 0xff;\n      data[p + 1] = (len >> 16) & 0xff;\n      data[p + 2] = (len >> 8) & 0xff;\n      data[p + 3] = len & 0xff;\n      p += 4;\n\n      data[p] = type.charCodeAt(0) & 0xff;\n      data[p + 1] = type.charCodeAt(1) & 0xff;\n      data[p + 2] = type.charCodeAt(2) & 0xff;\n      data[p + 3] = type.charCodeAt(3) & 0xff;\n      p += 4;\n\n      data.set(body, p);\n      p += body.length;\n\n      const crc = crc32(data, offset + 4, p);\n      data[p] = (crc >> 24) & 0xff;\n      data[p + 1] = (crc >> 16) & 0xff;\n      data[p + 2] = (crc >> 8) & 0xff;\n      data[p + 3] = crc & 0xff;\n    }\n\n    function adler32(data, start, end) {\n      let a = 1;\n      let b = 0;\n      for (let i = start; i < end; ++i) {\n        a = (a + (data[i] & 0xff)) % 65521;\n        b = (b + a) % 65521;\n      }\n      return (b << 16) | a;\n    }\n\n    /**\n     * @param {Uint8Array} literals The input data.\n     * @returns {Uint8Array} The DEFLATE-compressed data stream in zlib format.\n     *   This is the required format for compressed streams in the PNG format:\n     *   http://www.libpng.org/pub/png/spec/1.2/PNG-Compression.html\n     */\n    function deflateSync(literals) {\n      if (!isNodeJS) {\n        // zlib is certainly not available outside of Node.js. We can either use\n        // the pako library for client-side DEFLATE compression, or use the\n        // canvas API of the browser to obtain a more optimal PNG file.\n        return deflateSyncUncompressed(literals);\n      }\n      try {\n        // NOTE: This implementation is far from perfect, but already way better\n        // than not applying any compression.\n        //\n        // A better algorithm will try to choose a good predictor/filter and\n        // then choose a suitable zlib compression strategy (e.g. 3,Z_RLE).\n        //\n        // Node v0.11.12 zlib.deflateSync is introduced (and returns a Buffer).\n        // Node v3.0.0   Buffer inherits from Uint8Array.\n        // Node v8.0.0   zlib.deflateSync accepts Uint8Array as input.\n        let input;\n        // eslint-disable-next-line no-undef\n        if (parseInt(process.versions.node) >= 8) {\n          input = literals;\n        } else {\n          // eslint-disable-next-line no-undef\n          input = Buffer.from(literals);\n        }\n        const output = __non_webpack_require__(\"zlib\").deflateSync(input, {\n          level: 9,\n        });\n        return output instanceof Uint8Array ? output : new Uint8Array(output);\n      } catch (e) {\n        warn(\n          \"Not compressing PNG because zlib.deflateSync is unavailable: \" + e\n        );\n      }\n\n      return deflateSyncUncompressed(literals);\n    }\n\n    // An implementation of DEFLATE with compression level 0 (Z_NO_COMPRESSION).\n    function deflateSyncUncompressed(literals) {\n      let len = literals.length;\n      const maxBlockLength = 0xffff;\n\n      const deflateBlocks = Math.ceil(len / maxBlockLength);\n      const idat = new Uint8Array(2 + len + deflateBlocks * 5 + 4);\n      let pi = 0;\n      idat[pi++] = 0x78; // compression method and flags\n      idat[pi++] = 0x9c; // flags\n\n      let pos = 0;\n      while (len > maxBlockLength) {\n        // writing non-final DEFLATE blocks type 0 and length of 65535\n        idat[pi++] = 0x00;\n        idat[pi++] = 0xff;\n        idat[pi++] = 0xff;\n        idat[pi++] = 0x00;\n        idat[pi++] = 0x00;\n        idat.set(literals.subarray(pos, pos + maxBlockLength), pi);\n        pi += maxBlockLength;\n        pos += maxBlockLength;\n        len -= maxBlockLength;\n      }\n\n      // writing non-final DEFLATE blocks type 0\n      idat[pi++] = 0x01;\n      idat[pi++] = len & 0xff;\n      idat[pi++] = (len >> 8) & 0xff;\n      idat[pi++] = ~len & 0xffff & 0xff;\n      idat[pi++] = ((~len & 0xffff) >> 8) & 0xff;\n      idat.set(literals.subarray(pos), pi);\n      pi += literals.length - pos;\n\n      const adler = adler32(literals, 0, literals.length); // checksum\n      idat[pi++] = (adler >> 24) & 0xff;\n      idat[pi++] = (adler >> 16) & 0xff;\n      idat[pi++] = (adler >> 8) & 0xff;\n      idat[pi++] = adler & 0xff;\n      return idat;\n    }\n\n    function encode(imgData, kind, forceDataSchema, isMask) {\n      const width = imgData.width;\n      const height = imgData.height;\n      let bitDepth, colorType, lineSize;\n      const bytes = imgData.data;\n\n      switch (kind) {\n        case ImageKind.GRAYSCALE_1BPP:\n          colorType = 0;\n          bitDepth = 1;\n          lineSize = (width + 7) >> 3;\n          break;\n        case ImageKind.RGB_24BPP:\n          colorType = 2;\n          bitDepth = 8;\n          lineSize = width * 3;\n          break;\n        case ImageKind.RGBA_32BPP:\n          colorType = 6;\n          bitDepth = 8;\n          lineSize = width * 4;\n          break;\n        default:\n          throw new Error(\"invalid format\");\n      }\n\n      // prefix every row with predictor 0\n      const literals = new Uint8Array((1 + lineSize) * height);\n      let offsetLiterals = 0,\n        offsetBytes = 0;\n      for (let y = 0; y < height; ++y) {\n        literals[offsetLiterals++] = 0; // no prediction\n        literals.set(\n          bytes.subarray(offsetBytes, offsetBytes + lineSize),\n          offsetLiterals\n        );\n        offsetBytes += lineSize;\n        offsetLiterals += lineSize;\n      }\n\n      if (kind === ImageKind.GRAYSCALE_1BPP && isMask) {\n        // inverting for image masks\n        offsetLiterals = 0;\n        for (let y = 0; y < height; y++) {\n          offsetLiterals++; // skipping predictor\n          for (let i = 0; i < lineSize; i++) {\n            literals[offsetLiterals++] ^= 0xff;\n          }\n        }\n      }\n\n      const ihdr = new Uint8Array([\n        (width >> 24) & 0xff,\n        (width >> 16) & 0xff,\n        (width >> 8) & 0xff,\n        width & 0xff,\n        (height >> 24) & 0xff,\n        (height >> 16) & 0xff,\n        (height >> 8) & 0xff,\n        height & 0xff,\n        bitDepth, // bit depth\n        colorType, // color type\n        0x00, // compression method\n        0x00, // filter method\n        0x00, // interlace method\n      ]);\n      const idat = deflateSync(literals);\n\n      // PNG consists of: header, IHDR+data, IDAT+data, and IEND.\n      const pngLength =\n        PNG_HEADER.length + CHUNK_WRAPPER_SIZE * 3 + ihdr.length + idat.length;\n      const data = new Uint8Array(pngLength);\n      let offset = 0;\n      data.set(PNG_HEADER, offset);\n      offset += PNG_HEADER.length;\n      writePngChunk(\"IHDR\", ihdr, data, offset);\n      offset += CHUNK_WRAPPER_SIZE + ihdr.length;\n      writePngChunk(\"IDATA\", idat, data, offset);\n      offset += CHUNK_WRAPPER_SIZE + idat.length;\n      writePngChunk(\"IEND\", new Uint8Array(0), data, offset);\n\n      return createObjectURL(data, \"image/png\", forceDataSchema);\n    }\n\n    return function convertImgDataToPng(imgData, forceDataSchema, isMask) {\n      const kind =\n        imgData.kind === undefined ? ImageKind.GRAYSCALE_1BPP : imgData.kind;\n      return encode(imgData, kind, forceDataSchema, isMask);\n    };\n  })();\n\n  class SVGExtraState {\n    constructor() {\n      this.fontSizeScale = 1;\n      this.fontWeight = SVG_DEFAULTS.fontWeight;\n      this.fontSize = 0;\n\n      this.textMatrix = IDENTITY_MATRIX;\n      this.fontMatrix = FONT_IDENTITY_MATRIX;\n      this.leading = 0;\n      this.textRenderingMode = TextRenderingMode.FILL;\n      this.textMatrixScale = 1;\n\n      // Current point (in user coordinates)\n      this.x = 0;\n      this.y = 0;\n\n      // Start of text line (in text coordinates)\n      this.lineX = 0;\n      this.lineY = 0;\n\n      // Character and word spacing\n      this.charSpacing = 0;\n      this.wordSpacing = 0;\n      this.textHScale = 1;\n      this.textRise = 0;\n\n      // Default foreground and background colors\n      this.fillColor = SVG_DEFAULTS.fillColor;\n      this.strokeColor = \"#000000\";\n\n      this.fillAlpha = 1;\n      this.strokeAlpha = 1;\n      this.lineWidth = 1;\n      this.lineJoin = \"\";\n      this.lineCap = \"\";\n      this.miterLimit = 0;\n\n      this.dashArray = [];\n      this.dashPhase = 0;\n\n      this.dependencies = [];\n\n      // Clipping\n      this.activeClipUrl = null;\n      this.clipGroup = null;\n\n      this.maskId = \"\";\n    }\n\n    clone() {\n      return Object.create(this);\n    }\n\n    setCurrentPoint(x, y) {\n      this.x = x;\n      this.y = y;\n    }\n  }\n\n  // eslint-disable-next-line no-inner-declarations\n  function opListToTree(opList) {\n    let opTree = [];\n    const tmp = [];\n\n    for (const opListElement of opList) {\n      if (opListElement.fn === \"save\") {\n        opTree.push({ fnId: 92, fn: \"group\", items: [] });\n        tmp.push(opTree);\n        opTree = opTree[opTree.length - 1].items;\n        continue;\n      }\n\n      if (opListElement.fn === \"restore\") {\n        opTree = tmp.pop();\n      } else {\n        opTree.push(opListElement);\n      }\n    }\n    return opTree;\n  }\n\n  /**\n   * Format a float number as a string.\n   *\n   * @param value {number} - The float number to format.\n   * @returns {string}\n   */\n  // eslint-disable-next-line no-inner-declarations\n  function pf(value) {\n    if (Number.isInteger(value)) {\n      return value.toString();\n    }\n    const s = value.toFixed(10);\n    let i = s.length - 1;\n    if (s[i] !== \"0\") {\n      return s;\n    }\n\n    // Remove trailing zeros.\n    do {\n      i--;\n    } while (s[i] === \"0\");\n    return s.substring(0, s[i] === \".\" ? i : i + 1);\n  }\n\n  /**\n   * Format a transform matrix as a string. The standard rotation, scale and\n   * translation matrices are replaced by their shorter forms, and for\n   * identity matrices an empty string is returned to save memory.\n   *\n   * @param m {Array} - The transform matrix to format.\n   * @returns {string}\n   */\n  // eslint-disable-next-line no-inner-declarations\n  function pm(m) {\n    if (m[4] === 0 && m[5] === 0) {\n      if (m[1] === 0 && m[2] === 0) {\n        if (m[0] === 1 && m[3] === 1) {\n          return \"\";\n        }\n        return `scale(${pf(m[0])} ${pf(m[3])})`;\n      }\n      if (m[0] === m[3] && m[1] === -m[2]) {\n        const a = (Math.acos(m[0]) * 180) / Math.PI;\n        return `rotate(${pf(a)})`;\n      }\n    } else {\n      if (m[0] === 1 && m[1] === 0 && m[2] === 0 && m[3] === 1) {\n        return `translate(${pf(m[4])} ${pf(m[5])})`;\n      }\n    }\n    return (\n      `matrix(${pf(m[0])} ${pf(m[1])} ${pf(m[2])} ${pf(m[3])} ${pf(m[4])} ` +\n      `${pf(m[5])})`\n    );\n  }\n\n  // The counts below are relevant for all pages, so they have to be global\n  // instead of being members of `SVGGraphics` (which is recreated for\n  // each page).\n  let clipCount = 0;\n  let maskCount = 0;\n  let shadingCount = 0;\n\n  SVGGraphics = class SVGGraphics {\n    constructor(commonObjs, objs, forceDataSchema) {\n      this.svgFactory = new DOMSVGFactory();\n\n      this.current = new SVGExtraState();\n      this.transformMatrix = IDENTITY_MATRIX; // Graphics state matrix\n      this.transformStack = [];\n      this.extraStack = [];\n      this.commonObjs = commonObjs;\n      this.objs = objs;\n      this.pendingClip = null;\n      this.pendingEOFill = false;\n\n      this.embedFonts = false;\n      this.embeddedFonts = Object.create(null);\n      this.cssStyle = null;\n      this.forceDataSchema = !!forceDataSchema;\n\n      // In `src/shared/util.js` the operator names are mapped to IDs.\n      // The list below represents the reverse of that, i.e., it maps IDs\n      // to operator names.\n      this._operatorIdMapping = [];\n      for (const op in OPS) {\n        this._operatorIdMapping[OPS[op]] = op;\n      }\n    }\n\n    save() {\n      this.transformStack.push(this.transformMatrix);\n      const old = this.current;\n      this.extraStack.push(old);\n      this.current = old.clone();\n    }\n\n    restore() {\n      this.transformMatrix = this.transformStack.pop();\n      this.current = this.extraStack.pop();\n      this.pendingClip = null;\n      this.tgrp = null;\n    }\n\n    group(items) {\n      this.save();\n      this.executeOpTree(items);\n      this.restore();\n    }\n\n    loadDependencies(operatorList) {\n      const fnArray = operatorList.fnArray;\n      const argsArray = operatorList.argsArray;\n\n      for (let i = 0, ii = fnArray.length; i < ii; i++) {\n        if (fnArray[i] !== OPS.dependency) {\n          continue;\n        }\n\n        for (const obj of argsArray[i]) {\n          const objsPool = obj.startsWith(\"g_\") ? this.commonObjs : this.objs;\n          const promise = new Promise(resolve => {\n            objsPool.get(obj, resolve);\n          });\n          this.current.dependencies.push(promise);\n        }\n      }\n      return Promise.all(this.current.dependencies);\n    }\n\n    transform(a, b, c, d, e, f) {\n      const transformMatrix = [a, b, c, d, e, f];\n      this.transformMatrix = Util.transform(\n        this.transformMatrix,\n        transformMatrix\n      );\n      this.tgrp = null;\n    }\n\n    getSVG(operatorList, viewport) {\n      this.viewport = viewport;\n\n      const svgElement = this._initialize(viewport);\n      return this.loadDependencies(operatorList).then(() => {\n        this.transformMatrix = IDENTITY_MATRIX;\n        this.executeOpTree(this.convertOpList(operatorList));\n        return svgElement;\n      });\n    }\n\n    convertOpList(operatorList) {\n      const operatorIdMapping = this._operatorIdMapping;\n      const argsArray = operatorList.argsArray;\n      const fnArray = operatorList.fnArray;\n      const opList = [];\n      for (let i = 0, ii = fnArray.length; i < ii; i++) {\n        const fnId = fnArray[i];\n        opList.push({\n          fnId,\n          fn: operatorIdMapping[fnId],\n          args: argsArray[i],\n        });\n      }\n      return opListToTree(opList);\n    }\n\n    executeOpTree(opTree) {\n      for (const opTreeElement of opTree) {\n        const fn = opTreeElement.fn;\n        const fnId = opTreeElement.fnId;\n        const args = opTreeElement.args;\n\n        switch (fnId | 0) {\n          case OPS.beginText:\n            this.beginText();\n            break;\n          case OPS.dependency:\n            // Handled in `loadDependencies`, so no warning should be shown.\n            break;\n          case OPS.setLeading:\n            this.setLeading(args);\n            break;\n          case OPS.setLeadingMoveText:\n            this.setLeadingMoveText(args[0], args[1]);\n            break;\n          case OPS.setFont:\n            this.setFont(args);\n            break;\n          case OPS.showText:\n            this.showText(args[0]);\n            break;\n          case OPS.showSpacedText:\n            this.showText(args[0]);\n            break;\n          case OPS.endText:\n            this.endText();\n            break;\n          case OPS.moveText:\n            this.moveText(args[0], args[1]);\n            break;\n          case OPS.setCharSpacing:\n            this.setCharSpacing(args[0]);\n            break;\n          case OPS.setWordSpacing:\n            this.setWordSpacing(args[0]);\n            break;\n          case OPS.setHScale:\n            this.setHScale(args[0]);\n            break;\n          case OPS.setTextMatrix:\n            this.setTextMatrix(\n              args[0],\n              args[1],\n              args[2],\n              args[3],\n              args[4],\n              args[5]\n            );\n            break;\n          case OPS.setTextRise:\n            this.setTextRise(args[0]);\n            break;\n          case OPS.setTextRenderingMode:\n            this.setTextRenderingMode(args[0]);\n            break;\n          case OPS.setLineWidth:\n            this.setLineWidth(args[0]);\n            break;\n          case OPS.setLineJoin:\n            this.setLineJoin(args[0]);\n            break;\n          case OPS.setLineCap:\n            this.setLineCap(args[0]);\n            break;\n          case OPS.setMiterLimit:\n            this.setMiterLimit(args[0]);\n            break;\n          case OPS.setFillRGBColor:\n            this.setFillRGBColor(args[0], args[1], args[2]);\n            break;\n          case OPS.setStrokeRGBColor:\n            this.setStrokeRGBColor(args[0], args[1], args[2]);\n            break;\n          case OPS.setStrokeColorN:\n            this.setStrokeColorN(args);\n            break;\n          case OPS.setFillColorN:\n            this.setFillColorN(args);\n            break;\n          case OPS.shadingFill:\n            this.shadingFill(args[0]);\n            break;\n          case OPS.setDash:\n            this.setDash(args[0], args[1]);\n            break;\n          case OPS.setRenderingIntent:\n            this.setRenderingIntent(args[0]);\n            break;\n          case OPS.setFlatness:\n            this.setFlatness(args[0]);\n            break;\n          case OPS.setGState:\n            this.setGState(args[0]);\n            break;\n          case OPS.fill:\n            this.fill();\n            break;\n          case OPS.eoFill:\n            this.eoFill();\n            break;\n          case OPS.stroke:\n            this.stroke();\n            break;\n          case OPS.fillStroke:\n            this.fillStroke();\n            break;\n          case OPS.eoFillStroke:\n            this.eoFillStroke();\n            break;\n          case OPS.clip:\n            this.clip(\"nonzero\");\n            break;\n          case OPS.eoClip:\n            this.clip(\"evenodd\");\n            break;\n          case OPS.paintSolidColorImageMask:\n            this.paintSolidColorImageMask();\n            break;\n          case OPS.paintJpegXObject:\n            this.paintJpegXObject(args[0], args[1], args[2]);\n            break;\n          case OPS.paintImageXObject:\n            this.paintImageXObject(args[0]);\n            break;\n          case OPS.paintInlineImageXObject:\n            this.paintInlineImageXObject(args[0]);\n            break;\n          case OPS.paintImageMaskXObject:\n            this.paintImageMaskXObject(args[0]);\n            break;\n          case OPS.paintFormXObjectBegin:\n            this.paintFormXObjectBegin(args[0], args[1]);\n            break;\n          case OPS.paintFormXObjectEnd:\n            this.paintFormXObjectEnd();\n            break;\n          case OPS.closePath:\n            this.closePath();\n            break;\n          case OPS.closeStroke:\n            this.closeStroke();\n            break;\n          case OPS.closeFillStroke:\n            this.closeFillStroke();\n            break;\n          case OPS.closeEOFillStroke:\n            this.closeEOFillStroke();\n            break;\n          case OPS.nextLine:\n            this.nextLine();\n            break;\n          case OPS.transform:\n            this.transform(\n              args[0],\n              args[1],\n              args[2],\n              args[3],\n              args[4],\n              args[5]\n            );\n            break;\n          case OPS.constructPath:\n            this.constructPath(args[0], args[1]);\n            break;\n          case OPS.endPath:\n            this.endPath();\n            break;\n          case 92:\n            this.group(opTreeElement.items);\n            break;\n          default:\n            warn(`Unimplemented operator ${fn}`);\n            break;\n        }\n      }\n    }\n\n    setWordSpacing(wordSpacing) {\n      this.current.wordSpacing = wordSpacing;\n    }\n\n    setCharSpacing(charSpacing) {\n      this.current.charSpacing = charSpacing;\n    }\n\n    nextLine() {\n      this.moveText(0, this.current.leading);\n    }\n\n    setTextMatrix(a, b, c, d, e, f) {\n      const current = this.current;\n      current.textMatrix = current.lineMatrix = [a, b, c, d, e, f];\n      current.textMatrixScale = Math.sqrt(a * a + b * b);\n\n      current.x = current.lineX = 0;\n      current.y = current.lineY = 0;\n\n      current.xcoords = [];\n      current.tspan = this.svgFactory.createElement(\"svg:tspan\");\n      current.tspan.setAttributeNS(null, \"font-family\", current.fontFamily);\n      current.tspan.setAttributeNS(\n        null,\n        \"font-size\",\n        `${pf(current.fontSize)}px`\n      );\n      current.tspan.setAttributeNS(null, \"y\", pf(-current.y));\n\n      current.txtElement = this.svgFactory.createElement(\"svg:text\");\n      current.txtElement.appendChild(current.tspan);\n    }\n\n    beginText() {\n      const current = this.current;\n      current.x = current.lineX = 0;\n      current.y = current.lineY = 0;\n      current.textMatrix = IDENTITY_MATRIX;\n      current.lineMatrix = IDENTITY_MATRIX;\n      current.textMatrixScale = 1;\n      current.tspan = this.svgFactory.createElement(\"svg:tspan\");\n      current.txtElement = this.svgFactory.createElement(\"svg:text\");\n      current.txtgrp = this.svgFactory.createElement(\"svg:g\");\n      current.xcoords = [];\n    }\n\n    moveText(x, y) {\n      const current = this.current;\n      current.x = current.lineX += x;\n      current.y = current.lineY += y;\n\n      current.xcoords = [];\n      current.tspan = this.svgFactory.createElement(\"svg:tspan\");\n      current.tspan.setAttributeNS(null, \"font-family\", current.fontFamily);\n      current.tspan.setAttributeNS(\n        null,\n        \"font-size\",\n        `${pf(current.fontSize)}px`\n      );\n      current.tspan.setAttributeNS(null, \"y\", pf(-current.y));\n    }\n\n    showText(glyphs) {\n      const current = this.current;\n      const font = current.font;\n      const fontSize = current.fontSize;\n      if (fontSize === 0) {\n        return;\n      }\n\n      const charSpacing = current.charSpacing;\n      const wordSpacing = current.wordSpacing;\n      const fontDirection = current.fontDirection;\n      const textHScale = current.textHScale * fontDirection;\n      const vertical = font.vertical;\n      const widthAdvanceScale = fontSize * current.fontMatrix[0];\n\n      let x = 0;\n      for (const glyph of glyphs) {\n        if (glyph === null) {\n          // Word break\n          x += fontDirection * wordSpacing;\n          continue;\n        } else if (isNum(glyph)) {\n          x += -glyph * fontSize * 0.001;\n          continue;\n        }\n\n        const width = glyph.width;\n        const character = glyph.fontChar;\n        const spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing;\n        const charWidth = width * widthAdvanceScale + spacing * fontDirection;\n\n        if (!glyph.isInFont && !font.missingFile) {\n          x += charWidth;\n          // TODO: To assist with text selection, we should replace the missing\n          // character with a space character if charWidth is not zero.\n          // But we cannot just do \"character = ' '\", because the ' ' character\n          // might actually map to a different glyph.\n          continue;\n        }\n        current.xcoords.push(current.x + x);\n        current.tspan.textContent += character;\n        x += charWidth;\n      }\n      if (vertical) {\n        current.y -= x * textHScale;\n      } else {\n        current.x += x * textHScale;\n      }\n\n      current.tspan.setAttributeNS(\n        null,\n        \"x\",\n        current.xcoords.map(pf).join(\" \")\n      );\n      current.tspan.setAttributeNS(null, \"y\", pf(-current.y));\n      current.tspan.setAttributeNS(null, \"font-family\", current.fontFamily);\n      current.tspan.setAttributeNS(\n        null,\n        \"font-size\",\n        `${pf(current.fontSize)}px`\n      );\n      if (current.fontStyle !== SVG_DEFAULTS.fontStyle) {\n        current.tspan.setAttributeNS(null, \"font-style\", current.fontStyle);\n      }\n      if (current.fontWeight !== SVG_DEFAULTS.fontWeight) {\n        current.tspan.setAttributeNS(null, \"font-weight\", current.fontWeight);\n      }\n\n      const fillStrokeMode =\n        current.textRenderingMode & TextRenderingMode.FILL_STROKE_MASK;\n      if (\n        fillStrokeMode === TextRenderingMode.FILL ||\n        fillStrokeMode === TextRenderingMode.FILL_STROKE\n      ) {\n        if (current.fillColor !== SVG_DEFAULTS.fillColor) {\n          current.tspan.setAttributeNS(null, \"fill\", current.fillColor);\n        }\n        if (current.fillAlpha < 1) {\n          current.tspan.setAttributeNS(null, \"fill-opacity\", current.fillAlpha);\n        }\n      } else if (current.textRenderingMode === TextRenderingMode.ADD_TO_PATH) {\n        // Workaround for Firefox: We must set fill=\"transparent\" because\n        // fill=\"none\" would generate an empty clipping path.\n        current.tspan.setAttributeNS(null, \"fill\", \"transparent\");\n      } else {\n        current.tspan.setAttributeNS(null, \"fill\", \"none\");\n      }\n\n      if (\n        fillStrokeMode === TextRenderingMode.STROKE ||\n        fillStrokeMode === TextRenderingMode.FILL_STROKE\n      ) {\n        const lineWidthScale = 1 / (current.textMatrixScale || 1);\n        this._setStrokeAttributes(current.tspan, lineWidthScale);\n      }\n\n      // Include the text rise in the text matrix since the `pm` function\n      // creates the SVG element's `translate` entry (work on a copy to avoid\n      // altering the original text matrix).\n      let textMatrix = current.textMatrix;\n      if (current.textRise !== 0) {\n        textMatrix = textMatrix.slice();\n        textMatrix[5] += current.textRise;\n      }\n\n      current.txtElement.setAttributeNS(\n        null,\n        \"transform\",\n        `${pm(textMatrix)} scale(${pf(textHScale)}, -1)`\n      );\n      current.txtElement.setAttributeNS(XML_NS, \"xml:space\", \"preserve\");\n      current.txtElement.appendChild(current.tspan);\n      current.txtgrp.appendChild(current.txtElement);\n\n      this._ensureTransformGroup().appendChild(current.txtElement);\n    }\n\n    setLeadingMoveText(x, y) {\n      this.setLeading(-y);\n      this.moveText(x, y);\n    }\n\n    addFontStyle(fontObj) {\n      if (!this.cssStyle) {\n        this.cssStyle = this.svgFactory.createElement(\"svg:style\");\n        this.cssStyle.setAttributeNS(null, \"type\", \"text/css\");\n        this.defs.appendChild(this.cssStyle);\n      }\n\n      const url = createObjectURL(\n        fontObj.data,\n        fontObj.mimetype,\n        this.forceDataSchema\n      );\n      this.cssStyle.textContent +=\n        `@font-face { font-family: \"${fontObj.loadedName}\";` +\n        ` src: url(${url}); }\\n`;\n    }\n\n    setFont(details) {\n      const current = this.current;\n      const fontObj = this.commonObjs.get(details[0]);\n      let size = details[1];\n      current.font = fontObj;\n\n      if (\n        this.embedFonts &&\n        fontObj.data &&\n        !this.embeddedFonts[fontObj.loadedName]\n      ) {\n        this.addFontStyle(fontObj);\n        this.embeddedFonts[fontObj.loadedName] = fontObj;\n      }\n\n      current.fontMatrix = fontObj.fontMatrix\n        ? fontObj.fontMatrix\n        : FONT_IDENTITY_MATRIX;\n\n      let bold = \"normal\";\n      if (fontObj.black) {\n        bold = \"900\";\n      } else if (fontObj.bold) {\n        bold = \"bold\";\n      }\n      const italic = fontObj.italic ? \"italic\" : \"normal\";\n\n      if (size < 0) {\n        size = -size;\n        current.fontDirection = -1;\n      } else {\n        current.fontDirection = 1;\n      }\n      current.fontSize = size;\n      current.fontFamily = fontObj.loadedName;\n      current.fontWeight = bold;\n      current.fontStyle = italic;\n\n      current.tspan = this.svgFactory.createElement(\"svg:tspan\");\n      current.tspan.setAttributeNS(null, \"y\", pf(-current.y));\n      current.xcoords = [];\n    }\n\n    endText() {\n      const current = this.current;\n      if (\n        current.textRenderingMode & TextRenderingMode.ADD_TO_PATH_FLAG &&\n        current.txtElement &&\n        current.txtElement.hasChildNodes()\n      ) {\n        // If no glyphs are shown (i.e. no child nodes), no clipping occurs.\n        current.element = current.txtElement;\n        this.clip(\"nonzero\");\n        this.endPath();\n      }\n    }\n\n    // Path properties\n    setLineWidth(width) {\n      if (width > 0) {\n        this.current.lineWidth = width;\n      }\n    }\n\n    setLineCap(style) {\n      this.current.lineCap = LINE_CAP_STYLES[style];\n    }\n\n    setLineJoin(style) {\n      this.current.lineJoin = LINE_JOIN_STYLES[style];\n    }\n\n    setMiterLimit(limit) {\n      this.current.miterLimit = limit;\n    }\n\n    setStrokeAlpha(strokeAlpha) {\n      this.current.strokeAlpha = strokeAlpha;\n    }\n\n    setStrokeRGBColor(r, g, b) {\n      this.current.strokeColor = Util.makeCssRgb(r, g, b);\n    }\n\n    setFillAlpha(fillAlpha) {\n      this.current.fillAlpha = fillAlpha;\n    }\n\n    setFillRGBColor(r, g, b) {\n      this.current.fillColor = Util.makeCssRgb(r, g, b);\n      this.current.tspan = this.svgFactory.createElement(\"svg:tspan\");\n      this.current.xcoords = [];\n    }\n\n    setStrokeColorN(args) {\n      this.current.strokeColor = this._makeColorN_Pattern(args);\n    }\n\n    setFillColorN(args) {\n      this.current.fillColor = this._makeColorN_Pattern(args);\n    }\n\n    shadingFill(args) {\n      const width = this.viewport.width;\n      const height = this.viewport.height;\n      const inv = Util.inverseTransform(this.transformMatrix);\n      const bl = Util.applyTransform([0, 0], inv);\n      const br = Util.applyTransform([0, height], inv);\n      const ul = Util.applyTransform([width, 0], inv);\n      const ur = Util.applyTransform([width, height], inv);\n      const x0 = Math.min(bl[0], br[0], ul[0], ur[0]);\n      const y0 = Math.min(bl[1], br[1], ul[1], ur[1]);\n      const x1 = Math.max(bl[0], br[0], ul[0], ur[0]);\n      const y1 = Math.max(bl[1], br[1], ul[1], ur[1]);\n\n      const rect = this.svgFactory.createElement(\"svg:rect\");\n      rect.setAttributeNS(null, \"x\", x0);\n      rect.setAttributeNS(null, \"y\", y0);\n      rect.setAttributeNS(null, \"width\", x1 - x0);\n      rect.setAttributeNS(null, \"height\", y1 - y0);\n      rect.setAttributeNS(null, \"fill\", this._makeShadingPattern(args));\n      this._ensureTransformGroup().appendChild(rect);\n    }\n\n    /**\n     * @private\n     */\n    _makeColorN_Pattern(args) {\n      if (args[0] === \"TilingPattern\") {\n        return this._makeTilingPattern(args);\n      }\n      return this._makeShadingPattern(args);\n    }\n\n    /**\n     * @private\n     */\n    _makeTilingPattern(args) {\n      const color = args[1];\n      const operatorList = args[2];\n      const matrix = args[3] || IDENTITY_MATRIX;\n      const [x0, y0, x1, y1] = args[4];\n      const xstep = args[5];\n      const ystep = args[6];\n      const paintType = args[7];\n\n      const tilingId = `shading${shadingCount++}`;\n      const [tx0, ty0] = Util.applyTransform([x0, y0], matrix);\n      const [tx1, ty1] = Util.applyTransform([x1, y1], matrix);\n      const [xscale, yscale] = Util.singularValueDecompose2dScale(matrix);\n      const txstep = xstep * xscale;\n      const tystep = ystep * yscale;\n\n      const tiling = this.svgFactory.createElement(\"svg:pattern\");\n      tiling.setAttributeNS(null, \"id\", tilingId);\n      tiling.setAttributeNS(null, \"patternUnits\", \"userSpaceOnUse\");\n      tiling.setAttributeNS(null, \"width\", txstep);\n      tiling.setAttributeNS(null, \"height\", tystep);\n      tiling.setAttributeNS(null, \"x\", `${tx0}`);\n      tiling.setAttributeNS(null, \"y\", `${ty0}`);\n\n      // Save current state.\n      const svg = this.svg;\n      const transformMatrix = this.transformMatrix;\n      const fillColor = this.current.fillColor;\n      const strokeColor = this.current.strokeColor;\n\n      const bbox = this.svgFactory.create(tx1 - tx0, ty1 - ty0);\n      this.svg = bbox;\n      this.transformMatrix = matrix;\n      if (paintType === 2) {\n        const cssColor = Util.makeCssRgb(...color);\n        this.current.fillColor = cssColor;\n        this.current.strokeColor = cssColor;\n      }\n      this.executeOpTree(this.convertOpList(operatorList));\n\n      // Restore saved state.\n      this.svg = svg;\n      this.transformMatrix = transformMatrix;\n      this.current.fillColor = fillColor;\n      this.current.strokeColor = strokeColor;\n\n      tiling.appendChild(bbox.childNodes[0]);\n      this.defs.appendChild(tiling);\n      return `url(#${tilingId})`;\n    }\n\n    /**\n     * @private\n     */\n    _makeShadingPattern(args) {\n      switch (args[0]) {\n        case \"RadialAxial\":\n          const shadingId = `shading${shadingCount++}`;\n          const colorStops = args[3];\n          let gradient;\n\n          switch (args[1]) {\n            case \"axial\":\n              const point0 = args[4];\n              const point1 = args[5];\n              gradient = this.svgFactory.createElement(\"svg:linearGradient\");\n              gradient.setAttributeNS(null, \"id\", shadingId);\n              gradient.setAttributeNS(null, \"gradientUnits\", \"userSpaceOnUse\");\n              gradient.setAttributeNS(null, \"x1\", point0[0]);\n              gradient.setAttributeNS(null, \"y1\", point0[1]);\n              gradient.setAttributeNS(null, \"x2\", point1[0]);\n              gradient.setAttributeNS(null, \"y2\", point1[1]);\n              break;\n            case \"radial\":\n              const focalPoint = args[4];\n              const circlePoint = args[5];\n              const focalRadius = args[6];\n              const circleRadius = args[7];\n              gradient = this.svgFactory.createElement(\"svg:radialGradient\");\n              gradient.setAttributeNS(null, \"id\", shadingId);\n              gradient.setAttributeNS(null, \"gradientUnits\", \"userSpaceOnUse\");\n              gradient.setAttributeNS(null, \"cx\", circlePoint[0]);\n              gradient.setAttributeNS(null, \"cy\", circlePoint[1]);\n              gradient.setAttributeNS(null, \"r\", circleRadius);\n              gradient.setAttributeNS(null, \"fx\", focalPoint[0]);\n              gradient.setAttributeNS(null, \"fy\", focalPoint[1]);\n              gradient.setAttributeNS(null, \"fr\", focalRadius);\n              break;\n            default:\n              throw new Error(`Unknown RadialAxial type: ${args[1]}`);\n          }\n          for (const colorStop of colorStops) {\n            const stop = this.svgFactory.createElement(\"svg:stop\");\n            stop.setAttributeNS(null, \"offset\", colorStop[0]);\n            stop.setAttributeNS(null, \"stop-color\", colorStop[1]);\n            gradient.appendChild(stop);\n          }\n          this.defs.appendChild(gradient);\n          return `url(#${shadingId})`;\n        case \"Mesh\":\n          warn(\"Unimplemented pattern Mesh\");\n          return null;\n        case \"Dummy\":\n          return \"hotpink\";\n        default:\n          throw new Error(`Unknown IR type: ${args[0]}`);\n      }\n    }\n\n    setDash(dashArray, dashPhase) {\n      this.current.dashArray = dashArray;\n      this.current.dashPhase = dashPhase;\n    }\n\n    constructPath(ops, args) {\n      const current = this.current;\n      let x = current.x,\n        y = current.y;\n      let d = [];\n      let j = 0;\n\n      for (const op of ops) {\n        switch (op | 0) {\n          case OPS.rectangle:\n            x = args[j++];\n            y = args[j++];\n            const width = args[j++];\n            const height = args[j++];\n            const xw = x + width;\n            const yh = y + height;\n            d.push(\n              \"M\",\n              pf(x),\n              pf(y),\n              \"L\",\n              pf(xw),\n              pf(y),\n              \"L\",\n              pf(xw),\n              pf(yh),\n              \"L\",\n              pf(x),\n              pf(yh),\n              \"Z\"\n            );\n            break;\n          case OPS.moveTo:\n            x = args[j++];\n            y = args[j++];\n            d.push(\"M\", pf(x), pf(y));\n            break;\n          case OPS.lineTo:\n            x = args[j++];\n            y = args[j++];\n            d.push(\"L\", pf(x), pf(y));\n            break;\n          case OPS.curveTo:\n            x = args[j + 4];\n            y = args[j + 5];\n            d.push(\n              \"C\",\n              pf(args[j]),\n              pf(args[j + 1]),\n              pf(args[j + 2]),\n              pf(args[j + 3]),\n              pf(x),\n              pf(y)\n            );\n            j += 6;\n            break;\n          case OPS.curveTo2:\n            d.push(\n              \"C\",\n              pf(x),\n              pf(y),\n              pf(args[j]),\n              pf(args[j + 1]),\n              pf(args[j + 2]),\n              pf(args[j + 3])\n            );\n            x = args[j + 2];\n            y = args[j + 3];\n            j += 4;\n            break;\n          case OPS.curveTo3:\n            x = args[j + 2];\n            y = args[j + 3];\n            d.push(\n              \"C\",\n              pf(args[j]),\n              pf(args[j + 1]),\n              pf(x),\n              pf(y),\n              pf(x),\n              pf(y)\n            );\n            j += 4;\n            break;\n          case OPS.closePath:\n            d.push(\"Z\");\n            break;\n        }\n      }\n\n      d = d.join(\" \");\n\n      if (\n        current.path &&\n        ops.length > 0 &&\n        ops[0] !== OPS.rectangle &&\n        ops[0] !== OPS.moveTo\n      ) {\n        // If a path does not start with an OPS.rectangle or OPS.moveTo, it has\n        // probably been divided into two OPS.constructPath operators by\n        // OperatorList. Append the commands to the previous path element.\n        d = current.path.getAttributeNS(null, \"d\") + d;\n      } else {\n        current.path = this.svgFactory.createElement(\"svg:path\");\n        this._ensureTransformGroup().appendChild(current.path);\n      }\n\n      current.path.setAttributeNS(null, \"d\", d);\n      current.path.setAttributeNS(null, \"fill\", \"none\");\n\n      // Saving a reference in current.element so that it can be addressed\n      // in 'fill' and 'stroke'\n      current.element = current.path;\n      current.setCurrentPoint(x, y);\n    }\n\n    endPath() {\n      const current = this.current;\n\n      // Painting operators end a path.\n      current.path = null;\n\n      if (!this.pendingClip) {\n        return;\n      }\n      if (!current.element) {\n        this.pendingClip = null;\n        return;\n      }\n\n      // Add the current path to a clipping path.\n      const clipId = `clippath${clipCount++}`;\n      const clipPath = this.svgFactory.createElement(\"svg:clipPath\");\n      clipPath.setAttributeNS(null, \"id\", clipId);\n      clipPath.setAttributeNS(null, \"transform\", pm(this.transformMatrix));\n\n      // A deep clone is needed when text is used as a clipping path.\n      const clipElement = current.element.cloneNode(true);\n      if (this.pendingClip === \"evenodd\") {\n        clipElement.setAttributeNS(null, \"clip-rule\", \"evenodd\");\n      } else {\n        clipElement.setAttributeNS(null, \"clip-rule\", \"nonzero\");\n      }\n      this.pendingClip = null;\n      clipPath.appendChild(clipElement);\n      this.defs.appendChild(clipPath);\n\n      if (current.activeClipUrl) {\n        // The previous clipping group content can go out of order -- resetting\n        // cached clipGroups.\n        current.clipGroup = null;\n        this.extraStack.forEach(function(prev) {\n          prev.clipGroup = null;\n        });\n        // Intersect with the previous clipping path.\n        clipPath.setAttributeNS(null, \"clip-path\", current.activeClipUrl);\n      }\n      current.activeClipUrl = `url(#${clipId})`;\n\n      this.tgrp = null;\n    }\n\n    clip(type) {\n      this.pendingClip = type;\n    }\n\n    closePath() {\n      const current = this.current;\n      if (current.path) {\n        const d = `${current.path.getAttributeNS(null, \"d\")}Z`;\n        current.path.setAttributeNS(null, \"d\", d);\n      }\n    }\n\n    setLeading(leading) {\n      this.current.leading = -leading;\n    }\n\n    setTextRise(textRise) {\n      this.current.textRise = textRise;\n    }\n\n    setTextRenderingMode(textRenderingMode) {\n      this.current.textRenderingMode = textRenderingMode;\n    }\n\n    setHScale(scale) {\n      this.current.textHScale = scale / 100;\n    }\n\n    setRenderingIntent(intent) {\n      // This operation is ignored since we haven't found a use case for it yet.\n    }\n\n    setFlatness(flatness) {\n      // This operation is ignored since we haven't found a use case for it yet.\n    }\n\n    setGState(states) {\n      for (const [key, value] of states) {\n        switch (key) {\n          case \"LW\":\n            this.setLineWidth(value);\n            break;\n          case \"LC\":\n            this.setLineCap(value);\n            break;\n          case \"LJ\":\n            this.setLineJoin(value);\n            break;\n          case \"ML\":\n            this.setMiterLimit(value);\n            break;\n          case \"D\":\n            this.setDash(value[0], value[1]);\n            break;\n          case \"RI\":\n            this.setRenderingIntent(value);\n            break;\n          case \"FL\":\n            this.setFlatness(value);\n            break;\n          case \"Font\":\n            this.setFont(value);\n            break;\n          case \"CA\":\n            this.setStrokeAlpha(value);\n            break;\n          case \"ca\":\n            this.setFillAlpha(value);\n            break;\n          default:\n            warn(`Unimplemented graphic state operator ${key}`);\n            break;\n        }\n      }\n    }\n\n    fill() {\n      const current = this.current;\n      if (current.element) {\n        current.element.setAttributeNS(null, \"fill\", current.fillColor);\n        current.element.setAttributeNS(null, \"fill-opacity\", current.fillAlpha);\n        this.endPath();\n      }\n    }\n\n    stroke() {\n      const current = this.current;\n      if (current.element) {\n        this._setStrokeAttributes(current.element);\n        current.element.setAttributeNS(null, \"fill\", \"none\");\n        this.endPath();\n      }\n    }\n\n    /**\n     * @private\n     */\n    _setStrokeAttributes(element, lineWidthScale = 1) {\n      const current = this.current;\n      let dashArray = current.dashArray;\n      if (lineWidthScale !== 1 && dashArray.length > 0) {\n        dashArray = dashArray.map(function(value) {\n          return lineWidthScale * value;\n        });\n      }\n      element.setAttributeNS(null, \"stroke\", current.strokeColor);\n      element.setAttributeNS(null, \"stroke-opacity\", current.strokeAlpha);\n      element.setAttributeNS(null, \"stroke-miterlimit\", pf(current.miterLimit));\n      element.setAttributeNS(null, \"stroke-linecap\", current.lineCap);\n      element.setAttributeNS(null, \"stroke-linejoin\", current.lineJoin);\n      element.setAttributeNS(\n        null,\n        \"stroke-width\",\n        pf(lineWidthScale * current.lineWidth) + \"px\"\n      );\n      element.setAttributeNS(\n        null,\n        \"stroke-dasharray\",\n        dashArray.map(pf).join(\" \")\n      );\n      element.setAttributeNS(\n        null,\n        \"stroke-dashoffset\",\n        pf(lineWidthScale * current.dashPhase) + \"px\"\n      );\n    }\n\n    eoFill() {\n      if (this.current.element) {\n        this.current.element.setAttributeNS(null, \"fill-rule\", \"evenodd\");\n      }\n      this.fill();\n    }\n\n    fillStroke() {\n      // Order is important since stroke wants fill to be none.\n      // First stroke, then if fill needed, it will be overwritten.\n      this.stroke();\n      this.fill();\n    }\n\n    eoFillStroke() {\n      if (this.current.element) {\n        this.current.element.setAttributeNS(null, \"fill-rule\", \"evenodd\");\n      }\n      this.fillStroke();\n    }\n\n    closeStroke() {\n      this.closePath();\n      this.stroke();\n    }\n\n    closeFillStroke() {\n      this.closePath();\n      this.fillStroke();\n    }\n\n    closeEOFillStroke() {\n      this.closePath();\n      this.eoFillStroke();\n    }\n\n    paintSolidColorImageMask() {\n      const rect = this.svgFactory.createElement(\"svg:rect\");\n      rect.setAttributeNS(null, \"x\", \"0\");\n      rect.setAttributeNS(null, \"y\", \"0\");\n      rect.setAttributeNS(null, \"width\", \"1px\");\n      rect.setAttributeNS(null, \"height\", \"1px\");\n      rect.setAttributeNS(null, \"fill\", this.current.fillColor);\n\n      this._ensureTransformGroup().appendChild(rect);\n    }\n\n    paintJpegXObject(objId, w, h) {\n      const imgObj = this.objs.get(objId);\n      const imgEl = this.svgFactory.createElement(\"svg:image\");\n      imgEl.setAttributeNS(XLINK_NS, \"xlink:href\", imgObj.src);\n      imgEl.setAttributeNS(null, \"width\", pf(w));\n      imgEl.setAttributeNS(null, \"height\", pf(h));\n      imgEl.setAttributeNS(null, \"x\", \"0\");\n      imgEl.setAttributeNS(null, \"y\", pf(-h));\n      imgEl.setAttributeNS(\n        null,\n        \"transform\",\n        `scale(${pf(1 / w)} ${pf(-1 / h)})`\n      );\n\n      this._ensureTransformGroup().appendChild(imgEl);\n    }\n\n    paintImageXObject(objId) {\n      const imgData = this.objs.get(objId);\n      if (!imgData) {\n        warn(`Dependent image with object ID ${objId} is not ready yet`);\n        return;\n      }\n      this.paintInlineImageXObject(imgData);\n    }\n\n    paintInlineImageXObject(imgData, mask) {\n      const width = imgData.width;\n      const height = imgData.height;\n\n      const imgSrc = convertImgDataToPng(imgData, this.forceDataSchema, !!mask);\n      const cliprect = this.svgFactory.createElement(\"svg:rect\");\n      cliprect.setAttributeNS(null, \"x\", \"0\");\n      cliprect.setAttributeNS(null, \"y\", \"0\");\n      cliprect.setAttributeNS(null, \"width\", pf(width));\n      cliprect.setAttributeNS(null, \"height\", pf(height));\n      this.current.element = cliprect;\n      this.clip(\"nonzero\");\n\n      const imgEl = this.svgFactory.createElement(\"svg:image\");\n      imgEl.setAttributeNS(XLINK_NS, \"xlink:href\", imgSrc);\n      imgEl.setAttributeNS(null, \"x\", \"0\");\n      imgEl.setAttributeNS(null, \"y\", pf(-height));\n      imgEl.setAttributeNS(null, \"width\", pf(width) + \"px\");\n      imgEl.setAttributeNS(null, \"height\", pf(height) + \"px\");\n      imgEl.setAttributeNS(\n        null,\n        \"transform\",\n        `scale(${pf(1 / width)} ${pf(-1 / height)})`\n      );\n      if (mask) {\n        mask.appendChild(imgEl);\n      } else {\n        this._ensureTransformGroup().appendChild(imgEl);\n      }\n    }\n\n    paintImageMaskXObject(imgData) {\n      const current = this.current;\n      const width = imgData.width;\n      const height = imgData.height;\n      const fillColor = current.fillColor;\n\n      current.maskId = `mask${maskCount++}`;\n      const mask = this.svgFactory.createElement(\"svg:mask\");\n      mask.setAttributeNS(null, \"id\", current.maskId);\n\n      const rect = this.svgFactory.createElement(\"svg:rect\");\n      rect.setAttributeNS(null, \"x\", \"0\");\n      rect.setAttributeNS(null, \"y\", \"0\");\n      rect.setAttributeNS(null, \"width\", pf(width));\n      rect.setAttributeNS(null, \"height\", pf(height));\n      rect.setAttributeNS(null, \"fill\", fillColor);\n      rect.setAttributeNS(null, \"mask\", `url(#${current.maskId})`);\n\n      this.defs.appendChild(mask);\n      this._ensureTransformGroup().appendChild(rect);\n\n      this.paintInlineImageXObject(imgData, mask);\n    }\n\n    paintFormXObjectBegin(matrix, bbox) {\n      if (Array.isArray(matrix) && matrix.length === 6) {\n        this.transform(\n          matrix[0],\n          matrix[1],\n          matrix[2],\n          matrix[3],\n          matrix[4],\n          matrix[5]\n        );\n      }\n\n      if (bbox) {\n        const width = bbox[2] - bbox[0];\n        const height = bbox[3] - bbox[1];\n\n        const cliprect = this.svgFactory.createElement(\"svg:rect\");\n        cliprect.setAttributeNS(null, \"x\", bbox[0]);\n        cliprect.setAttributeNS(null, \"y\", bbox[1]);\n        cliprect.setAttributeNS(null, \"width\", pf(width));\n        cliprect.setAttributeNS(null, \"height\", pf(height));\n        this.current.element = cliprect;\n        this.clip(\"nonzero\");\n        this.endPath();\n      }\n    }\n\n    paintFormXObjectEnd() {}\n\n    /**\n     * @private\n     */\n    _initialize(viewport) {\n      const svg = this.svgFactory.create(viewport.width, viewport.height);\n\n      // Create the definitions element.\n      const definitions = this.svgFactory.createElement(\"svg:defs\");\n      svg.appendChild(definitions);\n      this.defs = definitions;\n\n      // Create the root group element, which acts a container for all other\n      // groups and applies the viewport transform.\n      const rootGroup = this.svgFactory.createElement(\"svg:g\");\n      rootGroup.setAttributeNS(null, \"transform\", pm(viewport.transform));\n      svg.appendChild(rootGroup);\n\n      // For the construction of the SVG image we are only interested in the\n      // root group, so we expose it as the entry point of the SVG image for\n      // the other code in this class.\n      this.svg = rootGroup;\n\n      return svg;\n    }\n\n    /**\n     * @private\n     */\n    _ensureClipGroup() {\n      if (!this.current.clipGroup) {\n        const clipGroup = this.svgFactory.createElement(\"svg:g\");\n        clipGroup.setAttributeNS(null, \"clip-path\", this.current.activeClipUrl);\n        this.svg.appendChild(clipGroup);\n        this.current.clipGroup = clipGroup;\n      }\n      return this.current.clipGroup;\n    }\n\n    /**\n     * @private\n     */\n    _ensureTransformGroup() {\n      if (!this.tgrp) {\n        this.tgrp = this.svgFactory.createElement(\"svg:g\");\n        this.tgrp.setAttributeNS(null, \"transform\", pm(this.transformMatrix));\n        if (this.current.activeClipUrl) {\n          this._ensureClipGroup().appendChild(this.tgrp);\n        } else {\n          this.svg.appendChild(this.tgrp);\n        }\n      }\n      return this.tgrp;\n    }\n  };\n}\n\nexport { SVGGraphics };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* globals __non_webpack_require__ */\n\nconst fs = __non_webpack_require__(\"fs\");\nconst http = __non_webpack_require__(\"http\");\nconst https = __non_webpack_require__(\"https\");\nconst url = __non_webpack_require__(\"url\");\n\nimport {\n  AbortException,\n  assert,\n  createPromiseCapability,\n  MissingPDFException,\n} from \"../shared/util.js\";\nimport {\n  extractFilenameFromHeader,\n  validateRangeRequestCapabilities,\n} from \"./network_utils.js\";\n\nconst fileUriRegex = /^file:\\/\\/\\/[a-zA-Z]:\\//;\n\nfunction parseUrl(sourceUrl) {\n  const parsedUrl = url.parse(sourceUrl);\n  if (parsedUrl.protocol === \"file:\" || parsedUrl.host) {\n    return parsedUrl;\n  }\n  // Prepending 'file:///' to Windows absolute path.\n  if (/^[a-z]:[/\\\\]/i.test(sourceUrl)) {\n    return url.parse(`file:///${sourceUrl}`);\n  }\n  // Changes protocol to 'file:' if url refers to filesystem.\n  if (!parsedUrl.host) {\n    parsedUrl.protocol = \"file:\";\n  }\n  return parsedUrl;\n}\n\nclass PDFNodeStream {\n  constructor(source) {\n    this.source = source;\n    this.url = parseUrl(source.url);\n    this.isHttp =\n      this.url.protocol === \"http:\" || this.url.protocol === \"https:\";\n    // Check if url refers to filesystem.\n    this.isFsUrl = this.url.protocol === \"file:\";\n    this.httpHeaders = (this.isHttp && source.httpHeaders) || {};\n\n    this._fullRequestReader = null;\n    this._rangeRequestReaders = [];\n  }\n\n  get _progressiveDataLength() {\n    return this._fullRequestReader ? this._fullRequestReader._loaded : 0;\n  }\n\n  getFullReader() {\n    assert(!this._fullRequestReader);\n    this._fullRequestReader = this.isFsUrl\n      ? new PDFNodeStreamFsFullReader(this)\n      : new PDFNodeStreamFullReader(this);\n    return this._fullRequestReader;\n  }\n\n  getRangeReader(start, end) {\n    if (end <= this._progressiveDataLength) {\n      return null;\n    }\n    const rangeReader = this.isFsUrl\n      ? new PDFNodeStreamFsRangeReader(this, start, end)\n      : new PDFNodeStreamRangeReader(this, start, end);\n    this._rangeRequestReaders.push(rangeReader);\n    return rangeReader;\n  }\n\n  cancelAllRequests(reason) {\n    if (this._fullRequestReader) {\n      this._fullRequestReader.cancel(reason);\n    }\n\n    const readers = this._rangeRequestReaders.slice(0);\n    readers.forEach(function(reader) {\n      reader.cancel(reason);\n    });\n  }\n}\n\nclass BaseFullReader {\n  constructor(stream) {\n    this._url = stream.url;\n    this._done = false;\n    this._storedError = null;\n    this.onProgress = null;\n    const source = stream.source;\n    this._contentLength = source.length; // optional\n    this._loaded = 0;\n    this._filename = null;\n\n    this._disableRange = source.disableRange || false;\n    this._rangeChunkSize = source.rangeChunkSize;\n    if (!this._rangeChunkSize && !this._disableRange) {\n      this._disableRange = true;\n    }\n\n    this._isStreamingSupported = !source.disableStream;\n    this._isRangeSupported = !source.disableRange;\n\n    this._readableStream = null;\n    this._readCapability = createPromiseCapability();\n    this._headersCapability = createPromiseCapability();\n  }\n\n  get headersReady() {\n    return this._headersCapability.promise;\n  }\n\n  get filename() {\n    return this._filename;\n  }\n\n  get contentLength() {\n    return this._contentLength;\n  }\n\n  get isRangeSupported() {\n    return this._isRangeSupported;\n  }\n\n  get isStreamingSupported() {\n    return this._isStreamingSupported;\n  }\n\n  async read() {\n    await this._readCapability.promise;\n    if (this._done) {\n      return { value: undefined, done: true };\n    }\n    if (this._storedError) {\n      throw this._storedError;\n    }\n\n    const chunk = this._readableStream.read();\n    if (chunk === null) {\n      this._readCapability = createPromiseCapability();\n      return this.read();\n    }\n    this._loaded += chunk.length;\n    if (this.onProgress) {\n      this.onProgress({\n        loaded: this._loaded,\n        total: this._contentLength,\n      });\n    }\n    // Ensure that `read()` method returns ArrayBuffer.\n    const buffer = new Uint8Array(chunk).buffer;\n    return { value: buffer, done: false };\n  }\n\n  cancel(reason) {\n    // Call `this._error()` method when cancel is called\n    // before _readableStream is set.\n    if (!this._readableStream) {\n      this._error(reason);\n      return;\n    }\n    this._readableStream.destroy(reason);\n  }\n\n  _error(reason) {\n    this._storedError = reason;\n    this._readCapability.resolve();\n  }\n\n  _setReadableStream(readableStream) {\n    this._readableStream = readableStream;\n    readableStream.on(\"readable\", () => {\n      this._readCapability.resolve();\n    });\n\n    readableStream.on(\"end\", () => {\n      // Destroy readable to minimize resource usage.\n      readableStream.destroy();\n      this._done = true;\n      this._readCapability.resolve();\n    });\n\n    readableStream.on(\"error\", reason => {\n      this._error(reason);\n    });\n\n    // We need to stop reading when range is supported and streaming is\n    // disabled.\n    if (!this._isStreamingSupported && this._isRangeSupported) {\n      this._error(new AbortException(\"streaming is disabled\"));\n    }\n\n    // Destroy ReadableStream if already in errored state.\n    if (this._storedError) {\n      this._readableStream.destroy(this._storedError);\n    }\n  }\n}\n\nclass BaseRangeReader {\n  constructor(stream) {\n    this._url = stream.url;\n    this._done = false;\n    this._storedError = null;\n    this.onProgress = null;\n    this._loaded = 0;\n    this._readableStream = null;\n    this._readCapability = createPromiseCapability();\n    const source = stream.source;\n    this._isStreamingSupported = !source.disableStream;\n  }\n\n  get isStreamingSupported() {\n    return this._isStreamingSupported;\n  }\n\n  async read() {\n    await this._readCapability.promise;\n    if (this._done) {\n      return { value: undefined, done: true };\n    }\n    if (this._storedError) {\n      throw this._storedError;\n    }\n\n    const chunk = this._readableStream.read();\n    if (chunk === null) {\n      this._readCapability = createPromiseCapability();\n      return this.read();\n    }\n    this._loaded += chunk.length;\n    if (this.onProgress) {\n      this.onProgress({ loaded: this._loaded });\n    }\n    // Ensure that `read()` method returns ArrayBuffer.\n    const buffer = new Uint8Array(chunk).buffer;\n    return { value: buffer, done: false };\n  }\n\n  cancel(reason) {\n    // Call `this._error()` method when cancel is called\n    // before _readableStream is set.\n    if (!this._readableStream) {\n      this._error(reason);\n      return;\n    }\n    this._readableStream.destroy(reason);\n  }\n\n  _error(reason) {\n    this._storedError = reason;\n    this._readCapability.resolve();\n  }\n\n  _setReadableStream(readableStream) {\n    this._readableStream = readableStream;\n    readableStream.on(\"readable\", () => {\n      this._readCapability.resolve();\n    });\n\n    readableStream.on(\"end\", () => {\n      // Destroy readableStream to minimize resource usage.\n      readableStream.destroy();\n      this._done = true;\n      this._readCapability.resolve();\n    });\n\n    readableStream.on(\"error\", reason => {\n      this._error(reason);\n    });\n\n    // Destroy readableStream if already in errored state.\n    if (this._storedError) {\n      this._readableStream.destroy(this._storedError);\n    }\n  }\n}\n\nfunction createRequestOptions(url, headers) {\n  return {\n    protocol: url.protocol,\n    auth: url.auth,\n    host: url.hostname,\n    port: url.port,\n    path: url.path,\n    method: \"GET\",\n    headers,\n  };\n}\n\nclass PDFNodeStreamFullReader extends BaseFullReader {\n  constructor(stream) {\n    super(stream);\n\n    const handleResponse = response => {\n      if (response.statusCode === 404) {\n        const error = new MissingPDFException(`Missing PDF \"${this._url}\".`);\n        this._storedError = error;\n        this._headersCapability.reject(error);\n        return;\n      }\n      this._headersCapability.resolve();\n      this._setReadableStream(response);\n\n      const getResponseHeader = name => {\n        // Make sure that headers name are in lower case, as mentioned\n        // here: https://nodejs.org/api/http.html#http_message_headers.\n        return this._readableStream.headers[name.toLowerCase()];\n      };\n      const {\n        allowRangeRequests,\n        suggestedLength,\n      } = validateRangeRequestCapabilities({\n        getResponseHeader,\n        isHttp: stream.isHttp,\n        rangeChunkSize: this._rangeChunkSize,\n        disableRange: this._disableRange,\n      });\n\n      this._isRangeSupported = allowRangeRequests;\n      // Setting right content length.\n      this._contentLength = suggestedLength || this._contentLength;\n\n      this._filename = extractFilenameFromHeader(getResponseHeader);\n    };\n\n    this._request = null;\n    if (this._url.protocol === \"http:\") {\n      this._request = http.request(\n        createRequestOptions(this._url, stream.httpHeaders),\n        handleResponse\n      );\n    } else {\n      this._request = https.request(\n        createRequestOptions(this._url, stream.httpHeaders),\n        handleResponse\n      );\n    }\n\n    this._request.on(\"error\", reason => {\n      this._storedError = reason;\n      this._headersCapability.reject(reason);\n    });\n    // Note: `request.end(data)` is used to write `data` to request body\n    // and notify end of request. But one should always call `request.end()`\n    // even if there is no data to write -- (to notify the end of request).\n    this._request.end();\n  }\n}\n\nclass PDFNodeStreamRangeReader extends BaseRangeReader {\n  constructor(stream, start, end) {\n    super(stream);\n\n    this._httpHeaders = {};\n    for (const property in stream.httpHeaders) {\n      const value = stream.httpHeaders[property];\n      if (typeof value === \"undefined\") {\n        continue;\n      }\n      this._httpHeaders[property] = value;\n    }\n    this._httpHeaders[\"Range\"] = `bytes=${start}-${end - 1}`;\n\n    const handleResponse = response => {\n      if (response.statusCode === 404) {\n        const error = new MissingPDFException(`Missing PDF \"${this._url}\".`);\n        this._storedError = error;\n        return;\n      }\n      this._setReadableStream(response);\n    };\n\n    this._request = null;\n    if (this._url.protocol === \"http:\") {\n      this._request = http.request(\n        createRequestOptions(this._url, this._httpHeaders),\n        handleResponse\n      );\n    } else {\n      this._request = https.request(\n        createRequestOptions(this._url, this._httpHeaders),\n        handleResponse\n      );\n    }\n\n    this._request.on(\"error\", reason => {\n      this._storedError = reason;\n    });\n    this._request.end();\n  }\n}\n\nclass PDFNodeStreamFsFullReader extends BaseFullReader {\n  constructor(stream) {\n    super(stream);\n\n    let path = decodeURIComponent(this._url.path);\n\n    // Remove the extra slash to get right path from url like `file:///C:/`\n    if (fileUriRegex.test(this._url.href)) {\n      path = path.replace(/^\\//, \"\");\n    }\n\n    fs.lstat(path, (error, stat) => {\n      if (error) {\n        if (error.code === \"ENOENT\") {\n          error = new MissingPDFException(`Missing PDF \"${path}\".`);\n        }\n        this._storedError = error;\n        this._headersCapability.reject(error);\n        return;\n      }\n      // Setting right content length.\n      this._contentLength = stat.size;\n\n      this._setReadableStream(fs.createReadStream(path));\n      this._headersCapability.resolve();\n    });\n  }\n}\n\nclass PDFNodeStreamFsRangeReader extends BaseRangeReader {\n  constructor(stream, start, end) {\n    super(stream);\n\n    let path = decodeURIComponent(this._url.path);\n\n    // Remove the extra slash to get right path from url like `file:///C:/`\n    if (fileUriRegex.test(this._url.href)) {\n      path = path.replace(/^\\//, \"\");\n    }\n\n    this._setReadableStream(fs.createReadStream(path, { start, end: end - 1 }));\n  }\n}\n\nexport { PDFNodeStream };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport {\n  assert,\n  MissingPDFException,\n  UnexpectedResponseException,\n} from \"../shared/util.js\";\nimport { getFilenameFromContentDispositionHeader } from \"./content_disposition.js\";\n\nfunction validateRangeRequestCapabilities({\n  getResponseHeader,\n  isHttp,\n  rangeChunkSize,\n  disableRange,\n}) {\n  assert(rangeChunkSize > 0, \"Range chunk size must be larger than zero\");\n  const returnValues = {\n    allowRangeRequests: false,\n    suggestedLength: undefined,\n  };\n\n  const length = parseInt(getResponseHeader(\"Content-Length\"), 10);\n  if (!Number.isInteger(length)) {\n    return returnValues;\n  }\n\n  returnValues.suggestedLength = length;\n\n  if (length <= 2 * rangeChunkSize) {\n    // The file size is smaller than the size of two chunks, so it does not\n    // make any sense to abort the request and retry with a range request.\n    return returnValues;\n  }\n\n  if (disableRange || !isHttp) {\n    return returnValues;\n  }\n  if (getResponseHeader(\"Accept-Ranges\") !== \"bytes\") {\n    return returnValues;\n  }\n\n  const contentEncoding = getResponseHeader(\"Content-Encoding\") || \"identity\";\n  if (contentEncoding !== \"identity\") {\n    return returnValues;\n  }\n\n  returnValues.allowRangeRequests = true;\n  return returnValues;\n}\n\nfunction extractFilenameFromHeader(getResponseHeader) {\n  const contentDisposition = getResponseHeader(\"Content-Disposition\");\n  if (contentDisposition) {\n    let filename = getFilenameFromContentDispositionHeader(contentDisposition);\n    if (filename.includes(\"%\")) {\n      try {\n        filename = decodeURIComponent(filename);\n      } catch (ex) {}\n    }\n    if (/\\.pdf$/i.test(filename)) {\n      return filename;\n    }\n  }\n  return null;\n}\n\nfunction createResponseStatusError(status, url) {\n  if (status === 404 || (status === 0 && url.startsWith(\"file:\"))) {\n    return new MissingPDFException('Missing PDF \"' + url + '\".');\n  }\n  return new UnexpectedResponseException(\n    \"Unexpected server response (\" +\n      status +\n      ') while retrieving PDF \"' +\n      url +\n      '\".',\n    status\n  );\n}\n\nfunction validateResponseStatus(status) {\n  return status === 200 || status === 206;\n}\n\nexport {\n  createResponseStatusError,\n  extractFilenameFromHeader,\n  validateRangeRequestCapabilities,\n  validateResponseStatus,\n};\n","/* Copyright 2017 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n// This getFilenameFromContentDispositionHeader function is adapted from\n// https://github.com/Rob--W/open-in-browser/blob/7e2e35a38b8b4e981b11da7b2f01df0149049e92/extension/content-disposition.js\n// with the following changes:\n// - Modified to conform to PDF.js's coding style.\n// - Support UTF-8 decoding when TextDecoder is unsupported.\n// - Move return to the end of the function to prevent Babel from dropping the\n//   function declarations.\n\n/**\n * Extract file name from the Content-Disposition HTTP response header.\n *\n * @param {string} contentDisposition\n * @returns {string} Filename, if found in the Content-Disposition header.\n */\nfunction getFilenameFromContentDispositionHeader(contentDisposition) {\n  let needsEncodingFixup = true;\n\n  // filename*=ext-value (\"ext-value\" from RFC 5987, referenced by RFC 6266).\n  let tmp = toParamRegExp(\"filename\\\\*\", \"i\").exec(contentDisposition);\n  if (tmp) {\n    tmp = tmp[1];\n    let filename = rfc2616unquote(tmp);\n    filename = unescape(filename);\n    filename = rfc5987decode(filename);\n    filename = rfc2047decode(filename);\n    return fixupEncoding(filename);\n  }\n\n  // Continuations (RFC 2231 section 3, referenced by RFC 5987 section 3.1).\n  // filename*n*=part\n  // filename*n=part\n  tmp = rfc2231getparam(contentDisposition);\n  if (tmp) {\n    // RFC 2047, section\n    const filename = rfc2047decode(tmp);\n    return fixupEncoding(filename);\n  }\n\n  // filename=value (RFC 5987, section 4.1).\n  tmp = toParamRegExp(\"filename\", \"i\").exec(contentDisposition);\n  if (tmp) {\n    tmp = tmp[1];\n    let filename = rfc2616unquote(tmp);\n    filename = rfc2047decode(filename);\n    return fixupEncoding(filename);\n  }\n\n  // After this line there are only function declarations. We cannot put\n  // \"return\" here for readability because babel would then drop the function\n  // declarations...\n  function toParamRegExp(attributePattern, flags) {\n    return new RegExp(\n      \"(?:^|;)\\\\s*\" +\n        attributePattern +\n        \"\\\\s*=\\\\s*\" +\n        // Captures: value = token | quoted-string\n        // (RFC 2616, section 3.6 and referenced by RFC 6266 4.1)\n        \"(\" +\n        '[^\";\\\\s][^;\\\\s]*' +\n        \"|\" +\n        '\"(?:[^\"\\\\\\\\]|\\\\\\\\\"?)+\"?' +\n        \")\",\n      flags\n    );\n  }\n  function textdecode(encoding, value) {\n    if (encoding) {\n      if (!/^[\\x00-\\xFF]+$/.test(value)) {\n        return value;\n      }\n      try {\n        const decoder = new TextDecoder(encoding, { fatal: true });\n        const bytes = Array.from(value, function(ch) {\n          return ch.charCodeAt(0) & 0xff;\n        });\n        value = decoder.decode(new Uint8Array(bytes));\n        needsEncodingFixup = false;\n      } catch (e) {\n        // TextDecoder constructor threw - unrecognized encoding.\n        // Or TextDecoder API is not available (in IE / Edge).\n        if (/^utf-?8$/i.test(encoding)) {\n          // UTF-8 is commonly used, try to support it in another way:\n          try {\n            value = decodeURIComponent(escape(value));\n            needsEncodingFixup = false;\n          } catch (err) {}\n        }\n      }\n    }\n    return value;\n  }\n  function fixupEncoding(value) {\n    if (needsEncodingFixup && /[\\x80-\\xff]/.test(value)) {\n      // Maybe multi-byte UTF-8.\n      value = textdecode(\"utf-8\", value);\n      if (needsEncodingFixup) {\n        // Try iso-8859-1 encoding.\n        value = textdecode(\"iso-8859-1\", value);\n      }\n    }\n    return value;\n  }\n  function rfc2231getparam(contentDisposition) {\n    const matches = [];\n    let match;\n    // Iterate over all filename*n= and filename*n*= with n being an integer\n    // of at least zero. Any non-zero number must not start with '0'.\n    const iter = toParamRegExp(\"filename\\\\*((?!0\\\\d)\\\\d+)(\\\\*?)\", \"ig\");\n    while ((match = iter.exec(contentDisposition)) !== null) {\n      let [, n, quot, part] = match; // eslint-disable-line prefer-const\n      n = parseInt(n, 10);\n      if (n in matches) {\n        // Ignore anything after the invalid second filename*0.\n        if (n === 0) {\n          break;\n        }\n        continue;\n      }\n      matches[n] = [quot, part];\n    }\n    const parts = [];\n    for (let n = 0; n < matches.length; ++n) {\n      if (!(n in matches)) {\n        // Numbers must be consecutive. Truncate when there is a hole.\n        break;\n      }\n      let [quot, part] = matches[n]; // eslint-disable-line prefer-const\n      part = rfc2616unquote(part);\n      if (quot) {\n        part = unescape(part);\n        if (n === 0) {\n          part = rfc5987decode(part);\n        }\n      }\n      parts.push(part);\n    }\n    return parts.join(\"\");\n  }\n  function rfc2616unquote(value) {\n    if (value.startsWith('\"')) {\n      const parts = value.slice(1).split('\\\\\"');\n      // Find the first unescaped \" and terminate there.\n      for (let i = 0; i < parts.length; ++i) {\n        const quotindex = parts[i].indexOf('\"');\n        if (quotindex !== -1) {\n          parts[i] = parts[i].slice(0, quotindex);\n          parts.length = i + 1; // Truncates and stop the iteration.\n        }\n        parts[i] = parts[i].replace(/\\\\(.)/g, \"$1\");\n      }\n      value = parts.join('\"');\n    }\n    return value;\n  }\n  function rfc5987decode(extvalue) {\n    // Decodes \"ext-value\" from RFC 5987.\n    const encodingend = extvalue.indexOf(\"'\");\n    if (encodingend === -1) {\n      // Some servers send \"filename*=\" without encoding 'language' prefix,\n      // e.g. in https://github.com/Rob--W/open-in-browser/issues/26\n      // Let's accept the value like Firefox (57) (Chrome 62 rejects it).\n      return extvalue;\n    }\n    const encoding = extvalue.slice(0, encodingend);\n    const langvalue = extvalue.slice(encodingend + 1);\n    // Ignore language (RFC 5987 section 3.2.1, and RFC 6266 section 4.1 ).\n    const value = langvalue.replace(/^[^']*'/, \"\");\n    return textdecode(encoding, value);\n  }\n  function rfc2047decode(value) {\n    // RFC 2047-decode the result. Firefox tried to drop support for it, but\n    // backed out because some servers use it - https://bugzil.la/875615\n    // Firefox's condition for decoding is here: https://searchfox.org/mozilla-central/rev/4a590a5a15e35d88a3b23dd6ac3c471cf85b04a8/netwerk/mime/nsMIMEHeaderParamImpl.cpp#742-748\n\n    // We are more strict and only recognize RFC 2047-encoding if the value\n    // starts with \"=?\", since then it is likely that the full value is\n    // RFC 2047-encoded.\n\n    // Firefox also decodes words even where RFC 2047 section 5 states:\n    // \"An 'encoded-word' MUST NOT appear within a 'quoted-string'.\"\n    if (!value.startsWith(\"=?\") || /[\\x00-\\x19\\x80-\\xff]/.test(value)) {\n      return value;\n    }\n    // RFC 2047, section 2.4\n    // encoded-word = \"=?\" charset \"?\" encoding \"?\" encoded-text \"?=\"\n    // charset = token (but let's restrict to characters that denote a\n    //       possibly valid encoding).\n    // encoding = q or b\n    // encoded-text = any printable ASCII character other than ? or space.\n    //        ... but Firefox permits ? and space.\n    return value.replace(\n      /=\\?([\\w-]*)\\?([QqBb])\\?((?:[^?]|\\?(?!=))*)\\?=/g,\n      function(_, charset, encoding, text) {\n        if (encoding === \"q\" || encoding === \"Q\") {\n          // RFC 2047 section 4.2.\n          text = text.replace(/_/g, \" \");\n          text = text.replace(/=([0-9a-fA-F]{2})/g, function(_, hex) {\n            return String.fromCharCode(parseInt(hex, 16));\n          });\n          return textdecode(charset, text);\n        } // else encoding is b or B - base64 (RFC 2047 section 4.1)\n        try {\n          text = atob(text);\n        } catch (e) {}\n        return textdecode(charset, text);\n      }\n    );\n  }\n\n  return \"\";\n}\n\nexport { getFilenameFromContentDispositionHeader };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\nimport {\n  assert,\n  createPromiseCapability,\n  stringToBytes,\n} from \"../shared/util.js\";\nimport {\n  createResponseStatusError,\n  extractFilenameFromHeader,\n  validateRangeRequestCapabilities,\n} from \"./network_utils.js\";\n\nif (typeof PDFJSDev !== \"undefined\" && PDFJSDev.test(\"MOZCENTRAL\")) {\n  throw new Error(\n    'Module \"./network.js\" shall not be used with MOZCENTRAL builds.'\n  );\n}\n\nconst OK_RESPONSE = 200;\nconst PARTIAL_CONTENT_RESPONSE = 206;\n\nfunction getArrayBuffer(xhr) {\n  const data = xhr.response;\n  if (typeof data !== \"string\") {\n    return data;\n  }\n  const array = stringToBytes(data);\n  return array.buffer;\n}\n\nclass NetworkManager {\n  constructor(url, args) {\n    this.url = url;\n    args = args || {};\n    this.isHttp = /^https?:/i.test(url);\n    this.httpHeaders = (this.isHttp && args.httpHeaders) || {};\n    this.withCredentials = args.withCredentials || false;\n    this.getXhr =\n      args.getXhr ||\n      function NetworkManager_getXhr() {\n        return new XMLHttpRequest();\n      };\n\n    this.currXhrId = 0;\n    this.pendingRequests = Object.create(null);\n  }\n\n  requestRange(begin, end, listeners) {\n    const args = {\n      begin,\n      end,\n    };\n    for (const prop in listeners) {\n      args[prop] = listeners[prop];\n    }\n    return this.request(args);\n  }\n\n  requestFull(listeners) {\n    return this.request(listeners);\n  }\n\n  request(args) {\n    const xhr = this.getXhr();\n    const xhrId = this.currXhrId++;\n    const pendingRequest = (this.pendingRequests[xhrId] = {\n      xhr,\n    });\n\n    xhr.open(\"GET\", this.url);\n    xhr.withCredentials = this.withCredentials;\n    for (const property in this.httpHeaders) {\n      const value = this.httpHeaders[property];\n      if (typeof value === \"undefined\") {\n        continue;\n      }\n      xhr.setRequestHeader(property, value);\n    }\n    if (this.isHttp && \"begin\" in args && \"end\" in args) {\n      xhr.setRequestHeader(\"Range\", `bytes=${args.begin}-${args.end - 1}`);\n      pendingRequest.expectedStatus = PARTIAL_CONTENT_RESPONSE;\n    } else {\n      pendingRequest.expectedStatus = OK_RESPONSE;\n    }\n    xhr.responseType = \"arraybuffer\";\n\n    if (args.onError) {\n      xhr.onerror = function(evt) {\n        args.onError(xhr.status);\n      };\n    }\n    xhr.onreadystatechange = this.onStateChange.bind(this, xhrId);\n    xhr.onprogress = this.onProgress.bind(this, xhrId);\n\n    pendingRequest.onHeadersReceived = args.onHeadersReceived;\n    pendingRequest.onDone = args.onDone;\n    pendingRequest.onError = args.onError;\n    pendingRequest.onProgress = args.onProgress;\n\n    xhr.send(null);\n\n    return xhrId;\n  }\n\n  onProgress(xhrId, evt) {\n    const pendingRequest = this.pendingRequests[xhrId];\n    if (!pendingRequest) {\n      // Maybe abortRequest was called...\n      return;\n    }\n\n    if (pendingRequest.onProgress) {\n      pendingRequest.onProgress(evt);\n    }\n  }\n\n  onStateChange(xhrId, evt) {\n    const pendingRequest = this.pendingRequests[xhrId];\n    if (!pendingRequest) {\n      // Maybe abortRequest was called...\n      return;\n    }\n\n    const xhr = pendingRequest.xhr;\n    if (xhr.readyState >= 2 && pendingRequest.onHeadersReceived) {\n      pendingRequest.onHeadersReceived();\n      delete pendingRequest.onHeadersReceived;\n    }\n\n    if (xhr.readyState !== 4) {\n      return;\n    }\n\n    if (!(xhrId in this.pendingRequests)) {\n      // The XHR request might have been aborted in onHeadersReceived()\n      // callback, in which case we should abort request.\n      return;\n    }\n\n    delete this.pendingRequests[xhrId];\n\n    // Success status == 0 can be on ftp, file and other protocols.\n    if (xhr.status === 0 && this.isHttp) {\n      if (pendingRequest.onError) {\n        pendingRequest.onError(xhr.status);\n      }\n      return;\n    }\n    const xhrStatus = xhr.status || OK_RESPONSE;\n\n    // From http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.2:\n    // \"A server MAY ignore the Range header\". This means it's possible to\n    // get a 200 rather than a 206 response from a range request.\n    const ok_response_on_range_request =\n      xhrStatus === OK_RESPONSE &&\n      pendingRequest.expectedStatus === PARTIAL_CONTENT_RESPONSE;\n\n    if (\n      !ok_response_on_range_request &&\n      xhrStatus !== pendingRequest.expectedStatus\n    ) {\n      if (pendingRequest.onError) {\n        pendingRequest.onError(xhr.status);\n      }\n      return;\n    }\n\n    const chunk = getArrayBuffer(xhr);\n    if (xhrStatus === PARTIAL_CONTENT_RESPONSE) {\n      const rangeHeader = xhr.getResponseHeader(\"Content-Range\");\n      const matches = /bytes (\\d+)-(\\d+)\\/(\\d+)/.exec(rangeHeader);\n      pendingRequest.onDone({\n        begin: parseInt(matches[1], 10),\n        chunk,\n      });\n    } else if (chunk) {\n      pendingRequest.onDone({\n        begin: 0,\n        chunk,\n      });\n    } else if (pendingRequest.onError) {\n      pendingRequest.onError(xhr.status);\n    }\n  }\n\n  hasPendingRequests() {\n    for (const xhrId in this.pendingRequests) {\n      return true;\n    }\n    return false;\n  }\n\n  getRequestXhr(xhrId) {\n    return this.pendingRequests[xhrId].xhr;\n  }\n\n  isPendingRequest(xhrId) {\n    return xhrId in this.pendingRequests;\n  }\n\n  abortAllRequests() {\n    for (const xhrId in this.pendingRequests) {\n      this.abortRequest(xhrId | 0);\n    }\n  }\n\n  abortRequest(xhrId) {\n    const xhr = this.pendingRequests[xhrId].xhr;\n    delete this.pendingRequests[xhrId];\n    xhr.abort();\n  }\n}\n\n/** @implements {IPDFStream} */\nclass PDFNetworkStream {\n  constructor(source) {\n    this._source = source;\n    this._manager = new NetworkManager(source.url, {\n      httpHeaders: source.httpHeaders,\n      withCredentials: source.withCredentials,\n    });\n    this._rangeChunkSize = source.rangeChunkSize;\n    this._fullRequestReader = null;\n    this._rangeRequestReaders = [];\n  }\n\n  _onRangeRequestReaderClosed(reader) {\n    const i = this._rangeRequestReaders.indexOf(reader);\n    if (i >= 0) {\n      this._rangeRequestReaders.splice(i, 1);\n    }\n  }\n\n  getFullReader() {\n    assert(!this._fullRequestReader);\n    this._fullRequestReader = new PDFNetworkStreamFullRequestReader(\n      this._manager,\n      this._source\n    );\n    return this._fullRequestReader;\n  }\n\n  getRangeReader(begin, end) {\n    const reader = new PDFNetworkStreamRangeRequestReader(\n      this._manager,\n      begin,\n      end\n    );\n    reader.onClosed = this._onRangeRequestReaderClosed.bind(this);\n    this._rangeRequestReaders.push(reader);\n    return reader;\n  }\n\n  cancelAllRequests(reason) {\n    if (this._fullRequestReader) {\n      this._fullRequestReader.cancel(reason);\n    }\n    const readers = this._rangeRequestReaders.slice(0);\n    readers.forEach(function(reader) {\n      reader.cancel(reason);\n    });\n  }\n}\n\n/** @implements {IPDFStreamReader} */\nclass PDFNetworkStreamFullRequestReader {\n  constructor(manager, source) {\n    this._manager = manager;\n\n    const args = {\n      onHeadersReceived: this._onHeadersReceived.bind(this),\n      onDone: this._onDone.bind(this),\n      onError: this._onError.bind(this),\n      onProgress: this._onProgress.bind(this),\n    };\n    this._url = source.url;\n    this._fullRequestId = manager.requestFull(args);\n    this._headersReceivedCapability = createPromiseCapability();\n    this._disableRange = source.disableRange || false;\n    this._contentLength = source.length; // Optional\n    this._rangeChunkSize = source.rangeChunkSize;\n    if (!this._rangeChunkSize && !this._disableRange) {\n      this._disableRange = true;\n    }\n\n    this._isStreamingSupported = false;\n    this._isRangeSupported = false;\n\n    this._cachedChunks = [];\n    this._requests = [];\n    this._done = false;\n    this._storedError = undefined;\n    this._filename = null;\n\n    this.onProgress = null;\n  }\n\n  _onHeadersReceived() {\n    const fullRequestXhrId = this._fullRequestId;\n    const fullRequestXhr = this._manager.getRequestXhr(fullRequestXhrId);\n\n    const getResponseHeader = name => {\n      return fullRequestXhr.getResponseHeader(name);\n    };\n    const {\n      allowRangeRequests,\n      suggestedLength,\n    } = validateRangeRequestCapabilities({\n      getResponseHeader,\n      isHttp: this._manager.isHttp,\n      rangeChunkSize: this._rangeChunkSize,\n      disableRange: this._disableRange,\n    });\n\n    if (allowRangeRequests) {\n      this._isRangeSupported = true;\n    }\n    // Setting right content length.\n    this._contentLength = suggestedLength || this._contentLength;\n\n    this._filename = extractFilenameFromHeader(getResponseHeader);\n\n    if (this._isRangeSupported) {\n      // NOTE: by cancelling the full request, and then issuing range\n      // requests, there will be an issue for sites where you can only\n      // request the pdf once. However, if this is the case, then the\n      // server should not be returning that it can support range requests.\n      this._manager.abortRequest(fullRequestXhrId);\n    }\n\n    this._headersReceivedCapability.resolve();\n  }\n\n  _onDone(args) {\n    if (args) {\n      if (this._requests.length > 0) {\n        const requestCapability = this._requests.shift();\n        requestCapability.resolve({ value: args.chunk, done: false });\n      } else {\n        this._cachedChunks.push(args.chunk);\n      }\n    }\n    this._done = true;\n    if (this._cachedChunks.length > 0) {\n      return;\n    }\n    this._requests.forEach(function(requestCapability) {\n      requestCapability.resolve({ value: undefined, done: true });\n    });\n    this._requests = [];\n  }\n\n  _onError(status) {\n    const url = this._url;\n    const exception = createResponseStatusError(status, url);\n    this._storedError = exception;\n    this._headersReceivedCapability.reject(exception);\n    this._requests.forEach(function(requestCapability) {\n      requestCapability.reject(exception);\n    });\n    this._requests = [];\n    this._cachedChunks = [];\n  }\n\n  _onProgress(data) {\n    if (this.onProgress) {\n      this.onProgress({\n        loaded: data.loaded,\n        total: data.lengthComputable ? data.total : this._contentLength,\n      });\n    }\n  }\n\n  get filename() {\n    return this._filename;\n  }\n\n  get isRangeSupported() {\n    return this._isRangeSupported;\n  }\n\n  get isStreamingSupported() {\n    return this._isStreamingSupported;\n  }\n\n  get contentLength() {\n    return this._contentLength;\n  }\n\n  get headersReady() {\n    return this._headersReceivedCapability.promise;\n  }\n\n  async read() {\n    if (this._storedError) {\n      throw this._storedError;\n    }\n    if (this._cachedChunks.length > 0) {\n      const chunk = this._cachedChunks.shift();\n      return { value: chunk, done: false };\n    }\n    if (this._done) {\n      return { value: undefined, done: true };\n    }\n    const requestCapability = createPromiseCapability();\n    this._requests.push(requestCapability);\n    return requestCapability.promise;\n  }\n\n  cancel(reason) {\n    this._done = true;\n    this._headersReceivedCapability.reject(reason);\n    this._requests.forEach(function(requestCapability) {\n      requestCapability.resolve({ value: undefined, done: true });\n    });\n    this._requests = [];\n    if (this._manager.isPendingRequest(this._fullRequestId)) {\n      this._manager.abortRequest(this._fullRequestId);\n    }\n    this._fullRequestReader = null;\n  }\n}\n\n/** @implements {IPDFStreamRangeReader} */\nclass PDFNetworkStreamRangeRequestReader {\n  constructor(manager, begin, end) {\n    this._manager = manager;\n    const args = {\n      onDone: this._onDone.bind(this),\n      onProgress: this._onProgress.bind(this),\n    };\n    this._requestId = manager.requestRange(begin, end, args);\n    this._requests = [];\n    this._queuedChunk = null;\n    this._done = false;\n\n    this.onProgress = null;\n    this.onClosed = null;\n  }\n\n  _close() {\n    if (this.onClosed) {\n      this.onClosed(this);\n    }\n  }\n\n  _onDone(data) {\n    const chunk = data.chunk;\n    if (this._requests.length > 0) {\n      const requestCapability = this._requests.shift();\n      requestCapability.resolve({ value: chunk, done: false });\n    } else {\n      this._queuedChunk = chunk;\n    }\n    this._done = true;\n    this._requests.forEach(function(requestCapability) {\n      requestCapability.resolve({ value: undefined, done: true });\n    });\n    this._requests = [];\n    this._close();\n  }\n\n  _onProgress(evt) {\n    if (!this.isStreamingSupported && this.onProgress) {\n      this.onProgress({\n        loaded: evt.loaded,\n      });\n    }\n  }\n\n  get isStreamingSupported() {\n    return false;\n  }\n\n  async read() {\n    if (this._queuedChunk !== null) {\n      const chunk = this._queuedChunk;\n      this._queuedChunk = null;\n      return { value: chunk, done: false };\n    }\n    if (this._done) {\n      return { value: undefined, done: true };\n    }\n    const requestCapability = createPromiseCapability();\n    this._requests.push(requestCapability);\n    return requestCapability.promise;\n  }\n\n  cancel(reason) {\n    this._done = true;\n    this._requests.forEach(function(requestCapability) {\n      requestCapability.resolve({ value: undefined, done: true });\n    });\n    this._requests = [];\n    if (this._manager.isPendingRequest(this._requestId)) {\n      this._manager.abortRequest(this._requestId);\n    }\n    this._close();\n  }\n}\n\nexport { PDFNetworkStream };\n","/* Copyright 2012 Mozilla Foundation\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/* eslint no-var: error */\n\nimport {\n  AbortException,\n  assert,\n  createPromiseCapability,\n} from \"../shared/util.js\";\nimport {\n  createResponseStatusError,\n  extractFilenameFromHeader,\n  validateRangeRequestCapabilities,\n  validateResponseStatus,\n} from \"./network_utils.js\";\n\nfunction createFetchOptions(headers, withCredentials, abortController) {\n  return {\n    method: \"GET\",\n    headers,\n    signal: abortController && abortController.signal,\n    mode: \"cors\",\n    credentials: withCredentials ? \"include\" : \"same-origin\",\n    redirect: \"follow\",\n  };\n}\n\nfunction createHeaders(httpHeaders) {\n  const headers = new Headers();\n  for (const property in httpHeaders) {\n    const value = httpHeaders[property];\n    if (typeof value === \"undefined\") {\n      continue;\n    }\n    headers.append(property, value);\n  }\n  return headers;\n}\n\n/** @implements {IPDFStream} */\nclass PDFFetchStream {\n  constructor(source) {\n    this.source = source;\n    this.isHttp = /^https?:/i.test(source.url);\n    this.httpHeaders = (this.isHttp && source.httpHeaders) || {};\n\n    this._fullRequestReader = null;\n    this._rangeRequestReaders = [];\n  }\n\n  get _progressiveDataLength() {\n    return this._fullRequestReader ? this._fullRequestReader._loaded : 0;\n  }\n\n  getFullReader() {\n    assert(!this._fullRequestReader);\n    this._fullRequestReader = new PDFFetchStreamReader(this);\n    return this._fullRequestReader;\n  }\n\n  getRangeReader(begin, end) {\n    if (end <= this._progressiveDataLength) {\n      return null;\n    }\n    const reader = new PDFFetchStreamRangeReader(this, begin, end);\n    this._rangeRequestReaders.push(reader);\n    return reader;\n  }\n\n  cancelAllRequests(reason) {\n    if (this._fullRequestReader) {\n      this._fullRequestReader.cancel(reason);\n    }\n    const readers = this._rangeRequestReaders.slice(0);\n    readers.forEach(function(reader) {\n      reader.cancel(reason);\n    });\n  }\n}\n\n/** @implements {IPDFStreamReader} */\nclass PDFFetchStreamReader {\n  constructor(stream) {\n    this._stream = stream;\n    this._reader = null;\n    this._loaded = 0;\n    this._filename = null;\n    const source = stream.source;\n    this._withCredentials = source.withCredentials || false;\n    this._contentLength = source.length;\n    this._headersCapability = createPromiseCapability();\n    this._disableRange = source.disableRange || false;\n    this._rangeChunkSize = source.rangeChunkSize;\n    if (!this._rangeChunkSize && !this._disableRange) {\n      this._disableRange = true;\n    }\n\n    if (typeof AbortController !== \"undefined\") {\n      this._abortController = new AbortController();\n    }\n    this._isStreamingSupported = !source.disableStream;\n    this._isRangeSupported = !source.disableRange;\n\n    this._headers = createHeaders(this._stream.httpHeaders);\n\n    const url = source.url;\n    fetch(\n      url,\n      createFetchOptions(\n        this._headers,\n        this._withCredentials,\n        this._abortController\n      )\n    )\n      .then(response => {\n        if (!validateResponseStatus(response.status)) {\n          throw createResponseStatusError(response.status, url);\n        }\n        this._reader = response.body.getReader();\n        this._headersCapability.resolve();\n\n        const getResponseHeader = name => {\n          return response.headers.get(name);\n        };\n        const {\n          allowRangeRequests,\n          suggestedLength,\n        } = validateRangeRequestCapabilities({\n          getResponseHeader,\n          isHttp: this._stream.isHttp,\n          rangeChunkSize: this._rangeChunkSize,\n          disableRange: this._disableRange,\n        });\n\n        this._isRangeSupported = allowRangeRequests;\n        // Setting right content length.\n        this._contentLength = suggestedLength || this._contentLength;\n\n        this._filename = extractFilenameFromHeader(getResponseHeader);\n\n        // We need to stop reading when range is supported and streaming is\n        // disabled.\n        if (!this._isStreamingSupported && this._isRangeSupported) {\n          this.cancel(new AbortException(\"Streaming is disabled.\"));\n        }\n      })\n      .catch(this._headersCapability.reject);\n\n    this.onProgress = null;\n  }\n\n  get headersReady() {\n    return this._headersCapability.promise;\n  }\n\n  get filename() {\n    return this._filename;\n  }\n\n  get contentLength() {\n    return this._contentLength;\n  }\n\n  get isRangeSupported() {\n    return this._isRangeSupported;\n  }\n\n  get isStreamingSupported() {\n    return this._isStreamingSupported;\n  }\n\n  async read() {\n    await this._headersCapability.promise;\n    const { value, done } = await this._reader.read();\n    if (done) {\n      return { value, done };\n    }\n    this._loaded += value.byteLength;\n    if (this.onProgress) {\n      this.onProgress({\n        loaded: this._loaded,\n        total: this._contentLength,\n      });\n    }\n    const buffer = new Uint8Array(value).buffer;\n    return { value: buffer, done: false };\n  }\n\n  cancel(reason) {\n    if (this._reader) {\n      this._reader.cancel(reason);\n    }\n    if (this._abortController) {\n      this._abortController.abort();\n    }\n  }\n}\n\n/** @implements {IPDFStreamRangeReader} */\nclass PDFFetchStreamRangeReader {\n  constructor(stream, begin, end) {\n    this._stream = stream;\n    this._reader = null;\n    this._loaded = 0;\n    const source = stream.source;\n    this._withCredentials = source.withCredentials || false;\n    this._readCapability = createPromiseCapability();\n    this._isStreamingSupported = !source.disableStream;\n\n    if (typeof AbortController !== \"undefined\") {\n      this._abortController = new AbortController();\n    }\n\n    this._headers = createHeaders(this._stream.httpHeaders);\n    this._headers.append(\"Range\", `bytes=${begin}-${end - 1}`);\n\n    const url = source.url;\n    fetch(\n      url,\n      createFetchOptions(\n        this._headers,\n        this._withCredentials,\n        this._abortController\n      )\n    ).then(response => {\n      if (!validateResponseStatus(response.status)) {\n        throw createResponseStatusError(response.status, url);\n      }\n      this._readCapability.resolve();\n      this._reader = response.body.getReader();\n    });\n\n    this.onProgress = null;\n  }\n\n  get isStreamingSupported() {\n    return this._isStreamingSupported;\n  }\n\n  async read() {\n    await this._readCapability.promise;\n    const { value, done } = await this._reader.read();\n    if (done) {\n      return { value, done };\n    }\n    this._loaded += value.byteLength;\n    if (this.onProgress) {\n      this.onProgress({ loaded: this._loaded });\n    }\n    const buffer = new Uint8Array(value).buffer;\n    return { value: buffer, done: false };\n  }\n\n  cancel(reason) {\n    if (this._reader) {\n      this._reader.cancel(reason);\n    }\n    if (this._abortController) {\n      this._abortController.abort();\n    }\n  }\n}\n\nexport { PDFFetchStream };\n"],"sourceRoot":""}

${this.title}

Code Editor : pdf.js.map