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exports\n \treturn __webpack_require__(__webpack_require__.s = 33);\n\n\n\n// WEBPACK FOOTER //\n// webpack/bootstrap 67a151ebb5e544e5a40d","/* 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 { PDFJS } from 'pdfjs-lib';\n\nconst CSS_UNITS = 96.0 / 72.0;\nconst DEFAULT_SCALE_VALUE = 'auto';\nconst DEFAULT_SCALE = 1.0;\nconst MIN_SCALE = 0.25;\nconst MAX_SCALE = 10.0;\nconst UNKNOWN_SCALE = 0;\nconst MAX_AUTO_SCALE = 1.25;\nconst SCROLLBAR_PADDING = 40;\nconst VERTICAL_PADDING = 5;\n\nconst RendererType = {\n  CANVAS: 'canvas',\n  SVG: 'svg',\n};\n\n// Replaces {{arguments}} with their values.\nfunction formatL10nValue(text, args) {\n  if (!args) {\n    return text;\n  }\n  return text.replace(/\\{\\{\\s*(\\w+)\\s*\\}\\}/g, (all, name) => {\n    return (name in args ? args[name] : '{{' + name + '}}');\n  });\n}\n\n/**\n * No-op implemetation of the localization service.\n * @implements {IL10n}\n */\nlet NullL10n = {\n  get(property, args, fallback) {\n    return Promise.resolve(formatL10nValue(fallback, args));\n  },\n\n  translate(element) {\n    return Promise.resolve();\n  },\n};\n\n/**\n * Disables fullscreen support, and by extension Presentation Mode,\n * in browsers which support the fullscreen API.\n * @var {boolean}\n */\nPDFJS.disableFullscreen = (PDFJS.disableFullscreen === undefined ?\n                           false : PDFJS.disableFullscreen);\n\n/**\n * Enables CSS only zooming.\n * @var {boolean}\n */\nPDFJS.useOnlyCssZoom = (PDFJS.useOnlyCssZoom === undefined ?\n                        false : PDFJS.useOnlyCssZoom);\n\n/**\n * The maximum supported canvas size in total pixels e.g. width * height.\n * The default value is 4096 * 4096. Use -1 for no limit.\n * @var {number}\n */\nPDFJS.maxCanvasPixels = (PDFJS.maxCanvasPixels === undefined ?\n                         16777216 : PDFJS.maxCanvasPixels);\n\n/**\n * Disables saving of the last position of the viewed PDF.\n * @var {boolean}\n */\nPDFJS.disableHistory = (PDFJS.disableHistory === undefined ?\n                        false : PDFJS.disableHistory);\n\n/**\n * Disables creation of the text layer that used for text selection and search.\n * @var {boolean}\n */\nPDFJS.disableTextLayer = (PDFJS.disableTextLayer === undefined ?\n                          false : PDFJS.disableTextLayer);\n\n/**\n * Disables maintaining the current position in the document when zooming.\n */\nPDFJS.ignoreCurrentPositionOnZoom = (PDFJS.ignoreCurrentPositionOnZoom ===\n  undefined ? false : PDFJS.ignoreCurrentPositionOnZoom);\n\nif (typeof PDFJSDev === 'undefined' ||\n    !PDFJSDev.test('FIREFOX || MOZCENTRAL')) {\n  /**\n   * Interface locale settings.\n   * @var {string}\n   */\n  PDFJS.locale =\n    (PDFJS.locale === undefined && typeof navigator !== 'undefined' ?\n     navigator.language : PDFJS.locale);\n}\n\n/**\n * Returns scale factor for the canvas. It makes sense for the HiDPI displays.\n * @return {Object} The object with horizontal (sx) and vertical (sy)\n                    scales. The scaled property is set to false if scaling is\n                    not required, true otherwise.\n */\nfunction getOutputScale(ctx) {\n  let devicePixelRatio = window.devicePixelRatio || 1;\n  let backingStoreRatio = ctx.webkitBackingStorePixelRatio ||\n                          ctx.mozBackingStorePixelRatio ||\n                          ctx.msBackingStorePixelRatio ||\n                          ctx.oBackingStorePixelRatio ||\n                          ctx.backingStorePixelRatio || 1;\n  let pixelRatio = devicePixelRatio / backingStoreRatio;\n  return {\n    sx: pixelRatio,\n    sy: pixelRatio,\n    scaled: pixelRatio !== 1,\n  };\n}\n\n/**\n * Scrolls specified element into view of its parent.\n * @param {Object} element - The element to be visible.\n * @param {Object} spot - An object with optional top and left properties,\n *   specifying the offset from the top left edge.\n * @param {boolean} skipOverflowHiddenElements - Ignore elements that have\n *   the CSS rule `overflow: hidden;` set. The default is false.\n */\nfunction scrollIntoView(element, spot, skipOverflowHiddenElements = false) {\n  // Assuming offsetParent is available (it's not available when viewer is in\n  // hidden iframe or object). We have to scroll: if the offsetParent is not set\n  // producing the error. See also animationStarted.\n  let parent = element.offsetParent;\n  if (!parent) {\n    console.error('offsetParent is not set -- cannot scroll');\n    return;\n  }\n  let offsetY = element.offsetTop + element.clientTop;\n  let offsetX = element.offsetLeft + element.clientLeft;\n  while (parent.clientHeight === parent.scrollHeight ||\n         (skipOverflowHiddenElements &&\n          getComputedStyle(parent).overflow === 'hidden')) {\n    if (parent.dataset._scaleY) {\n      offsetY /= parent.dataset._scaleY;\n      offsetX /= parent.dataset._scaleX;\n    }\n    offsetY += parent.offsetTop;\n    offsetX += parent.offsetLeft;\n    parent = parent.offsetParent;\n    if (!parent) {\n      return; // no need to scroll\n    }\n  }\n  if (spot) {\n    if (spot.top !== undefined) {\n      offsetY += spot.top;\n    }\n    if (spot.left !== undefined) {\n      offsetX += spot.left;\n      parent.scrollLeft = offsetX;\n    }\n  }\n  parent.scrollTop = offsetY;\n}\n\n/**\n * Helper function to start monitoring the scroll event and converting them into\n * PDF.js friendly one: with scroll debounce and scroll direction.\n */\nfunction watchScroll(viewAreaElement, callback) {\n  let debounceScroll = function(evt) {\n    if (rAF) {\n      return;\n    }\n    // schedule an invocation of scroll for next animation frame.\n    rAF = window.requestAnimationFrame(function viewAreaElementScrolled() {\n      rAF = null;\n\n      let currentY = viewAreaElement.scrollTop;\n      let lastY = state.lastY;\n      if (currentY !== lastY) {\n        state.down = currentY > lastY;\n      }\n      state.lastY = currentY;\n      callback(state);\n    });\n  };\n\n  let state = {\n    down: true,\n    lastY: viewAreaElement.scrollTop,\n    _eventHandler: debounceScroll,\n  };\n\n  let rAF = null;\n  viewAreaElement.addEventListener('scroll', debounceScroll, true);\n  return state;\n}\n\n/**\n * Helper function to parse query string (e.g. ?param1=value&parm2=...).\n */\nfunction parseQueryString(query) {\n  let parts = query.split('&');\n  let params = Object.create(null);\n  for (let i = 0, ii = parts.length; i < ii; ++i) {\n    let param = parts[i].split('=');\n    let key = param[0].toLowerCase();\n    let value = param.length > 1 ? param[1] : null;\n    params[decodeURIComponent(key)] = decodeURIComponent(value);\n  }\n  return params;\n}\n\n/**\n * Use binary search to find the index of the first item in a given array which\n * passes a given condition. The items are expected to be sorted in the sense\n * that if the condition is true for one item in the array, then it is also true\n * for all following items.\n *\n * @returns {Number} Index of the first array element to pass the test,\n *                   or |items.length| if no such element exists.\n */\nfunction binarySearchFirstItem(items, condition) {\n  let minIndex = 0;\n  let maxIndex = items.length - 1;\n\n  if (items.length === 0 || !condition(items[maxIndex])) {\n    return items.length;\n  }\n  if (condition(items[minIndex])) {\n    return minIndex;\n  }\n\n  while (minIndex < maxIndex) {\n    let currentIndex = (minIndex + maxIndex) >> 1;\n    let currentItem = items[currentIndex];\n    if (condition(currentItem)) {\n      maxIndex = currentIndex;\n    } else {\n      minIndex = currentIndex + 1;\n    }\n  }\n  return minIndex; /* === maxIndex */\n}\n\n/**\n *  Approximates float number as a fraction using Farey sequence (max order\n *  of 8).\n *  @param {number} x - Positive float number.\n *  @returns {Array} Estimated fraction: the first array item is a numerator,\n *                   the second one is a denominator.\n */\nfunction approximateFraction(x) {\n  // Fast paths for int numbers or their inversions.\n  if (Math.floor(x) === x) {\n    return [x, 1];\n  }\n  let xinv = 1 / x;\n  let limit = 8;\n  if (xinv > limit) {\n    return [1, limit];\n  } else if (Math.floor(xinv) === xinv) {\n    return [1, xinv];\n  }\n\n  let x_ = x > 1 ? xinv : x;\n  // a/b and c/d are neighbours in Farey sequence.\n  let a = 0, b = 1, c = 1, d = 1;\n  // Limiting search to order 8.\n  while (true) {\n    // Generating next term in sequence (order of q).\n    let p = a + c, q = b + d;\n    if (q > limit) {\n      break;\n    }\n    if (x_ <= p / q) {\n      c = p; d = q;\n    } else {\n      a = p; b = q;\n    }\n  }\n  let result;\n  // Select closest of the neighbours to x.\n  if (x_ - a / b < c / d - x_) {\n    result = x_ === x ? [a, b] : [b, a];\n  } else {\n    result = x_ === x ? [c, d] : [d, c];\n  }\n  return result;\n}\n\nfunction roundToDivide(x, div) {\n  let r = x % div;\n  return r === 0 ? x : Math.round(x - r + div);\n}\n\n/**\n * Generic helper to find out what elements are visible within a scroll pane.\n */\nfunction getVisibleElements(scrollEl, views, sortByVisibility = false) {\n  let top = scrollEl.scrollTop, bottom = top + scrollEl.clientHeight;\n  let left = scrollEl.scrollLeft, right = left + scrollEl.clientWidth;\n\n  function isElementBottomBelowViewTop(view) {\n    let element = view.div;\n    let elementBottom =\n      element.offsetTop + element.clientTop + element.clientHeight;\n    return elementBottom > top;\n  }\n\n  let visible = [], view, element;\n  let currentHeight, viewHeight, hiddenHeight, percentHeight;\n  let currentWidth, viewWidth;\n  let firstVisibleElementInd = views.length === 0 ? 0 :\n    binarySearchFirstItem(views, isElementBottomBelowViewTop);\n\n  for (let i = firstVisibleElementInd, ii = views.length; i < ii; i++) {\n    view = views[i];\n    element = view.div;\n    currentHeight = element.offsetTop + element.clientTop;\n    viewHeight = element.clientHeight;\n\n    if (currentHeight > bottom) {\n      break;\n    }\n\n    currentWidth = element.offsetLeft + element.clientLeft;\n    viewWidth = element.clientWidth;\n    if (currentWidth + viewWidth < left || currentWidth > right) {\n      continue;\n    }\n    hiddenHeight = Math.max(0, top - currentHeight) +\n      Math.max(0, currentHeight + viewHeight - bottom);\n    percentHeight = ((viewHeight - hiddenHeight) * 100 / viewHeight) | 0;\n\n    visible.push({\n      id: view.id,\n      x: currentWidth,\n      y: currentHeight,\n      view,\n      percent: percentHeight,\n    });\n  }\n\n  let first = visible[0];\n  let last = visible[visible.length - 1];\n\n  if (sortByVisibility) {\n    visible.sort(function(a, b) {\n      let pc = a.percent - b.percent;\n      if (Math.abs(pc) > 0.001) {\n        return -pc;\n      }\n      return a.id - b.id; // ensure stability\n    });\n  }\n  return { first, last, views: visible, };\n}\n\n/**\n * Event handler to suppress context menu.\n */\nfunction noContextMenuHandler(evt) {\n  evt.preventDefault();\n}\n\nfunction isDataSchema(url) {\n  let i = 0, ii = url.length;\n  while (i < ii && url[i].trim() === '') {\n    i++;\n  }\n  return url.substr(i, 5).toLowerCase() === 'data:';\n}\n\n/**\n * Returns the filename or guessed filename from the url (see issue 3455).\n * @param {string} url - The original PDF location.\n * @param {string} defaultFilename - The value returned if the filename is\n *   unknown, or the protocol is unsupported.\n * @returns {string} Guessed PDF filename.\n */\nfunction getPDFFileNameFromURL(url, defaultFilename = 'document.pdf') {\n  if (isDataSchema(url)) {\n    console.warn('getPDFFileNameFromURL: ' +\n                 'ignoring \"data:\" URL for performance reasons.');\n    return defaultFilename;\n  }\n  const reURI = /^(?:(?:[^:]+:)?\\/\\/[^\\/]+)?([^?#]*)(\\?[^#]*)?(#.*)?$/;\n  //            SCHEME        HOST         1.PATH  2.QUERY   3.REF\n  // Pattern to get last matching NAME.pdf\n  const reFilename = /[^\\/?#=]+\\.pdf\\b(?!.*\\.pdf\\b)/i;\n  let splitURI = reURI.exec(url);\n  let suggestedFilename = reFilename.exec(splitURI[1]) ||\n                          reFilename.exec(splitURI[2]) ||\n                          reFilename.exec(splitURI[3]);\n  if (suggestedFilename) {\n    suggestedFilename = suggestedFilename[0];\n    if (suggestedFilename.indexOf('%') !== -1) {\n      // URL-encoded %2Fpath%2Fto%2Ffile.pdf should be file.pdf\n      try {\n        suggestedFilename =\n          reFilename.exec(decodeURIComponent(suggestedFilename))[0];\n      } catch (ex) { // Possible (extremely rare) errors:\n        // URIError \"Malformed URI\", e.g. for \"%AA.pdf\"\n        // TypeError \"null has no properties\", e.g. for \"%2F.pdf\"\n      }\n    }\n  }\n  return suggestedFilename || defaultFilename;\n}\n\nfunction normalizeWheelEventDelta(evt) {\n  let delta = Math.sqrt(evt.deltaX * evt.deltaX + evt.deltaY * evt.deltaY);\n  let angle = Math.atan2(evt.deltaY, evt.deltaX);\n  if (-0.25 * Math.PI < angle && angle < 0.75 * Math.PI) {\n    // All that is left-up oriented has to change the sign.\n    delta = -delta;\n  }\n\n  const MOUSE_DOM_DELTA_PIXEL_MODE = 0;\n  const MOUSE_DOM_DELTA_LINE_MODE = 1;\n  const MOUSE_PIXELS_PER_LINE = 30;\n  const MOUSE_LINES_PER_PAGE = 30;\n\n  // Converts delta to per-page units\n  if (evt.deltaMode === MOUSE_DOM_DELTA_PIXEL_MODE) {\n    delta /= MOUSE_PIXELS_PER_LINE * MOUSE_LINES_PER_PAGE;\n  } else if (evt.deltaMode === MOUSE_DOM_DELTA_LINE_MODE) {\n    delta /= MOUSE_LINES_PER_PAGE;\n  }\n  return delta;\n}\n\nfunction cloneObj(obj) {\n  let result = Object.create(null);\n  for (let i in obj) {\n    if (Object.prototype.hasOwnProperty.call(obj, i)) {\n      result[i] = obj[i];\n    }\n  }\n  return result;\n}\n\n/**\n * Promise that is resolved when DOM window becomes visible.\n */\nlet animationStarted = new Promise(function (resolve) {\n  window.requestAnimationFrame(resolve);\n});\n\n/**\n * (deprecated) External localization service.\n */\nlet mozL10n;\n\n/**\n * (deprecated) Promise that is resolved when UI localization is finished.\n */\nlet localized = Promise.resolve();\n\n/**\n * Simple event bus for an application. Listeners are attached using the\n * `on` and `off` methods. To raise an event, the `dispatch` method shall be\n * used.\n */\nclass EventBus {\n  constructor() {\n    this._listeners = Object.create(null);\n  }\n\n  on(eventName, listener) {\n    let eventListeners = this._listeners[eventName];\n    if (!eventListeners) {\n      eventListeners = [];\n      this._listeners[eventName] = eventListeners;\n    }\n    eventListeners.push(listener);\n  }\n\n  off(eventName, listener) {\n    let eventListeners = this._listeners[eventName];\n    let i;\n    if (!eventListeners || ((i = eventListeners.indexOf(listener)) < 0)) {\n      return;\n    }\n    eventListeners.splice(i, 1);\n  }\n\n  dispatch(eventName) {\n    let eventListeners = this._listeners[eventName];\n    if (!eventListeners || eventListeners.length === 0) {\n      return;\n    }\n    // Passing all arguments after the eventName to the listeners.\n    let args = Array.prototype.slice.call(arguments, 1);\n    // Making copy of the listeners array in case if it will be modified\n    // during dispatch.\n    eventListeners.slice(0).forEach(function (listener) {\n      listener.apply(null, args);\n    });\n  }\n}\n\nfunction clamp(v, min, max) {\n  return Math.min(Math.max(v, min), max);\n}\n\nclass ProgressBar {\n  constructor(id, { height, width, units, } = {}) {\n    this.visible = true;\n\n    // Fetch the sub-elements for later.\n    this.div = document.querySelector(id + ' .progress');\n    // Get the loading bar element, so it can be resized to fit the viewer.\n    this.bar = this.div.parentNode;\n\n    // Get options, with sensible defaults.\n    this.height = height || 100;\n    this.width = width || 100;\n    this.units = units || '%';\n\n    // Initialize heights.\n    this.div.style.height = this.height + this.units;\n    this.percent = 0;\n  }\n\n  _updateBar() {\n    if (this._indeterminate) {\n      this.div.classList.add('indeterminate');\n      this.div.style.width = this.width + this.units;\n      return;\n    }\n\n    this.div.classList.remove('indeterminate');\n    let progressSize = this.width * this._percent / 100;\n    this.div.style.width = progressSize + this.units;\n  }\n\n  get percent() {\n    return this._percent;\n  }\n\n  set percent(val) {\n    this._indeterminate = isNaN(val);\n    this._percent = clamp(val, 0, 100);\n    this._updateBar();\n  }\n\n  setWidth(viewer) {\n    if (!viewer) {\n      return;\n    }\n    let container = viewer.parentNode;\n    let scrollbarWidth = container.offsetWidth - viewer.offsetWidth;\n    if (scrollbarWidth > 0) {\n      this.bar.setAttribute('style', 'width: calc(100% - ' +\n                                     scrollbarWidth + 'px);');\n    }\n  }\n\n  hide() {\n    if (!this.visible) {\n      return;\n    }\n    this.visible = false;\n    this.bar.classList.add('hidden');\n    document.body.classList.remove('loadingInProgress');\n  }\n\n  show() {\n    if (this.visible) {\n      return;\n    }\n    this.visible = true;\n    document.body.classList.add('loadingInProgress');\n    this.bar.classList.remove('hidden');\n  }\n}\n\nexport {\n  CSS_UNITS,\n  DEFAULT_SCALE_VALUE,\n  DEFAULT_SCALE,\n  MIN_SCALE,\n  MAX_SCALE,\n  UNKNOWN_SCALE,\n  MAX_AUTO_SCALE,\n  SCROLLBAR_PADDING,\n  VERTICAL_PADDING,\n  cloneObj,\n  RendererType,\n  mozL10n,\n  NullL10n,\n  EventBus,\n  ProgressBar,\n  getPDFFileNameFromURL,\n  noContextMenuHandler,\n  parseQueryString,\n  getVisibleElements,\n  roundToDivide,\n  approximateFraction,\n  getOutputScale,\n  scrollIntoView,\n  watchScroll,\n  binarySearchFirstItem,\n  normalizeWheelEventDelta,\n  animationStarted,\n  localized,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/ui_utils.js","/* Copyright 2016 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 module, __non_webpack_require__ */\n\n'use strict';\n\nvar pdfjsLib;\nif (typeof window !== 'undefined' && window['pdfjs-dist/build/pdf']) {\n  pdfjsLib = window['pdfjs-dist/build/pdf'];\n} else {\n  pdfjsLib = __non_webpack_require__('../build/pdf.js');\n}\nmodule.exports = pdfjsLib;\n\n\n\n// WEBPACK FOOTER //\n// web/pdfjs.js","/* Copyright 2016 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 { EventBus } from './ui_utils';\n\n// Attaching to the application event bus to dispatch events to the DOM for\n// backwards viewer API compatibility.\nfunction attachDOMEventsToEventBus(eventBus) {\n  eventBus.on('documentload', function() {\n    let event = document.createEvent('CustomEvent');\n    event.initCustomEvent('documentload', true, true, {});\n    window.dispatchEvent(event);\n  });\n  eventBus.on('pagerendered', function(evt) {\n    let event = document.createEvent('CustomEvent');\n    event.initCustomEvent('pagerendered', true, true, {\n      pageNumber: evt.pageNumber,\n      cssTransform: evt.cssTransform,\n    });\n    evt.source.div.dispatchEvent(event);\n  });\n  eventBus.on('textlayerrendered', function(evt) {\n    let event = document.createEvent('CustomEvent');\n    event.initCustomEvent('textlayerrendered', true, true, {\n      pageNumber: evt.pageNumber,\n    });\n    evt.source.textLayerDiv.dispatchEvent(event);\n  });\n  eventBus.on('pagechange', function(evt) {\n    let event = document.createEvent('UIEvents');\n    event.initUIEvent('pagechange', true, true, window, 0);\n    event.pageNumber = evt.pageNumber;\n    evt.source.container.dispatchEvent(event);\n  });\n  eventBus.on('pagesinit', function(evt) {\n    let event = document.createEvent('CustomEvent');\n    event.initCustomEvent('pagesinit', true, true, null);\n    evt.source.container.dispatchEvent(event);\n  });\n  eventBus.on('pagesloaded', function(evt) {\n    let event = document.createEvent('CustomEvent');\n    event.initCustomEvent('pagesloaded', true, true, {\n      pagesCount: evt.pagesCount,\n    });\n    evt.source.container.dispatchEvent(event);\n  });\n  eventBus.on('scalechange', function(evt) {\n    let event = document.createEvent('UIEvents');\n    event.initUIEvent('scalechange', true, true, window, 0);\n    event.scale = evt.scale;\n    event.presetValue = evt.presetValue;\n    evt.source.container.dispatchEvent(event);\n  });\n  eventBus.on('updateviewarea', function(evt) {\n    let event = document.createEvent('UIEvents');\n    event.initUIEvent('updateviewarea', true, true, window, 0);\n    event.location = evt.location;\n    evt.source.container.dispatchEvent(event);\n  });\n  eventBus.on('find', function(evt) {\n    if (evt.source === window) {\n      return; // event comes from FirefoxCom, no need to replicate\n    }\n    let event = document.createEvent('CustomEvent');\n    event.initCustomEvent('find' + evt.type, true, true, {\n      query: evt.query,\n      phraseSearch: evt.phraseSearch,\n      caseSensitive: evt.caseSensitive,\n      highlightAll: evt.highlightAll,\n      findPrevious: evt.findPrevious,\n    });\n    window.dispatchEvent(event);\n  });\n  eventBus.on('attachmentsloaded', function(evt) {\n    let event = document.createEvent('CustomEvent');\n    event.initCustomEvent('attachmentsloaded', true, true, {\n      attachmentsCount: evt.attachmentsCount,\n    });\n    evt.source.container.dispatchEvent(event);\n  });\n  eventBus.on('sidebarviewchanged', function(evt) {\n    let event = document.createEvent('CustomEvent');\n    event.initCustomEvent('sidebarviewchanged', true, true, {\n      view: evt.view,\n    });\n    evt.source.outerContainer.dispatchEvent(event);\n  });\n  eventBus.on('pagemode', function(evt) {\n    let event = document.createEvent('CustomEvent');\n    event.initCustomEvent('pagemode', true, true, {\n      mode: evt.mode,\n    });\n    evt.source.pdfViewer.container.dispatchEvent(event);\n  });\n  eventBus.on('namedaction', function(evt) {\n    let event = document.createEvent('CustomEvent');\n    event.initCustomEvent('namedaction', true, true, {\n      action: evt.action,\n    });\n    evt.source.pdfViewer.container.dispatchEvent(event);\n  });\n  eventBus.on('presentationmodechanged', function(evt) {\n    let event = document.createEvent('CustomEvent');\n    event.initCustomEvent('presentationmodechanged', true, true, {\n      active: evt.active,\n      switchInProgress: evt.switchInProgress,\n    });\n    window.dispatchEvent(event);\n  });\n  eventBus.on('outlineloaded', function(evt) {\n    let event = document.createEvent('CustomEvent');\n    event.initCustomEvent('outlineloaded', true, true, {\n      outlineCount: evt.outlineCount,\n    });\n    evt.source.container.dispatchEvent(event);\n  });\n}\n\nlet globalEventBus = null;\nfunction getGlobalEventBus() {\n  if (globalEventBus) {\n    return globalEventBus;\n  }\n  globalEventBus = new EventBus();\n  attachDOMEventsToEventBus(globalEventBus);\n  return globalEventBus;\n}\n\nexport {\n  attachDOMEventsToEventBus,\n  getGlobalEventBus,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/dom_events.js","/* 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\nconst CLEANUP_TIMEOUT = 30000;\n\nconst RenderingStates = {\n  INITIAL: 0,\n  RUNNING: 1,\n  PAUSED: 2,\n  FINISHED: 3,\n};\n\n/**\n * Controls rendering of the views for pages and thumbnails.\n */\nclass PDFRenderingQueue {\n  constructor() {\n    this.pdfViewer = null;\n    this.pdfThumbnailViewer = null;\n    this.onIdle = null;\n    this.highestPriorityPage = null;\n    this.idleTimeout = null;\n    this.printing = false;\n    this.isThumbnailViewEnabled = false;\n  }\n\n  /**\n   * @param {PDFViewer} pdfViewer\n   */\n  setViewer(pdfViewer) {\n    this.pdfViewer = pdfViewer;\n  }\n\n  /**\n   * @param {PDFThumbnailViewer} pdfThumbnailViewer\n   */\n  setThumbnailViewer(pdfThumbnailViewer) {\n    this.pdfThumbnailViewer = pdfThumbnailViewer;\n  }\n\n  /**\n   * @param {IRenderableView} view\n   * @returns {boolean}\n   */\n  isHighestPriority(view) {\n    return this.highestPriorityPage === view.renderingId;\n  }\n\n  /**\n   * @param {Object} currentlyVisiblePages\n   */\n  renderHighestPriority(currentlyVisiblePages) {\n    if (this.idleTimeout) {\n      clearTimeout(this.idleTimeout);\n      this.idleTimeout = null;\n    }\n\n    // Pages have a higher priority than thumbnails, so check them first.\n    if (this.pdfViewer.forceRendering(currentlyVisiblePages)) {\n      return;\n    }\n    // No pages needed rendering, so check thumbnails.\n    if (this.pdfThumbnailViewer && this.isThumbnailViewEnabled) {\n      if (this.pdfThumbnailViewer.forceRendering()) {\n        return;\n      }\n    }\n\n    if (this.printing) {\n      // If printing is currently ongoing do not reschedule cleanup.\n      return;\n    }\n\n    if (this.onIdle) {\n      this.idleTimeout = setTimeout(this.onIdle.bind(this), CLEANUP_TIMEOUT);\n    }\n  }\n\n  /**\n   * @param {Object} visible\n   * @param {Array} views\n   * @param {boolean} scrolledDown\n   */\n  getHighestPriority(visible, views, scrolledDown) {\n    /**\n     * The state has changed. Figure out which page has the highest priority to\n     * render next (if any).\n     *\n     * Priority:\n     * 1. visible pages\n     * 2. if last scrolled down, the page after the visible pages, or\n     *    if last scrolled up, the page before the visible pages\n     */\n    var visibleViews = visible.views;\n\n    var numVisible = visibleViews.length;\n    if (numVisible === 0) {\n      return false;\n    }\n    for (var i = 0; i < numVisible; ++i) {\n      var view = visibleViews[i].view;\n      if (!this.isViewFinished(view)) {\n        return view;\n      }\n    }\n\n    // All the visible views have rendered; try to render next/previous pages.\n    if (scrolledDown) {\n      var nextPageIndex = visible.last.id;\n      // IDs start at 1, so no need to add 1.\n      if (views[nextPageIndex] && !this.isViewFinished(views[nextPageIndex])) {\n        return views[nextPageIndex];\n      }\n    } else {\n      var previousPageIndex = visible.first.id - 2;\n      if (views[previousPageIndex] &&\n          !this.isViewFinished(views[previousPageIndex])) {\n        return views[previousPageIndex];\n      }\n    }\n    // Everything that needs to be rendered has been.\n    return null;\n  }\n\n  /**\n   * @param {IRenderableView} view\n   * @returns {boolean}\n   */\n  isViewFinished(view) {\n    return view.renderingState === RenderingStates.FINISHED;\n  }\n\n  /**\n   * Render a page or thumbnail view. This calls the appropriate function\n   * based on the views state. If the view is already rendered it will return\n   * `false`.\n   *\n   * @param {IRenderableView} view\n   */\n  renderView(view) {\n    switch (view.renderingState) {\n      case RenderingStates.FINISHED:\n        return false;\n      case RenderingStates.PAUSED:\n        this.highestPriorityPage = view.renderingId;\n        view.resume();\n        break;\n      case RenderingStates.RUNNING:\n        this.highestPriorityPage = view.renderingId;\n        break;\n      case RenderingStates.INITIAL:\n        this.highestPriorityPage = view.renderingId;\n        var continueRendering = () => {\n          this.renderHighestPriority();\n        };\n        view.draw().then(continueRendering, continueRendering);\n        break;\n    }\n    return true;\n  }\n}\n\nexport {\n  RenderingStates,\n  PDFRenderingQueue,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/pdf_rendering_queue.js","/* 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 PDFBug, Stats */\n\nimport {\n  animationStarted, DEFAULT_SCALE_VALUE, getPDFFileNameFromURL, MAX_SCALE,\n  MIN_SCALE, noContextMenuHandler, normalizeWheelEventDelta,\n  parseQueryString, ProgressBar, RendererType, UNKNOWN_SCALE\n} from './ui_utils';\nimport {\n  build, createBlob, getDocument, getFilenameFromUrl, InvalidPDFException,\n  MissingPDFException, OPS, PDFJS, shadow, UnexpectedResponseException,\n  UNSUPPORTED_FEATURES, version\n} from 'pdfjs-lib';\nimport { CursorTool, PDFCursorTools } from './pdf_cursor_tools';\nimport { PDFRenderingQueue, RenderingStates } from './pdf_rendering_queue';\nimport { PDFSidebar, SidebarView } from './pdf_sidebar';\nimport { PDFViewer, PresentationModeState } from './pdf_viewer';\nimport { getGlobalEventBus } from './dom_events';\nimport { OverlayManager } from './overlay_manager';\nimport { PasswordPrompt } from './password_prompt';\nimport { PDFAttachmentViewer } from './pdf_attachment_viewer';\nimport { PDFDocumentProperties } from './pdf_document_properties';\nimport { PDFFindBar } from './pdf_find_bar';\nimport { PDFFindController } from './pdf_find_controller';\nimport { PDFHistory } from './pdf_history';\nimport { PDFLinkService } from './pdf_link_service';\nimport { PDFOutlineViewer } from './pdf_outline_viewer';\nimport { PDFPresentationMode } from './pdf_presentation_mode';\nimport { PDFThumbnailViewer } from './pdf_thumbnail_viewer';\nimport { SecondaryToolbar } from './secondary_toolbar';\nimport { Toolbar } from './toolbar';\nimport { ViewHistory } from './view_history';\n\nconst DEFAULT_SCALE_DELTA = 1.1;\nconst DISABLE_AUTO_FETCH_LOADING_BAR_TIMEOUT = 5000;\n\nfunction configure(PDFJS) {\n  PDFJS.imageResourcesPath = './images/';\n  if (typeof PDFJSDev !== 'undefined' &&\n      PDFJSDev.test('FIREFOX || MOZCENTRAL || GENERIC || CHROME')) {\n    PDFJS.workerSrc = '../build/pdf.worker.js';\n  }\n  if (typeof PDFJSDev === 'undefined' || !PDFJSDev.test('PRODUCTION')) {\n    PDFJS.cMapUrl = '../external/bcmaps/';\n    PDFJS.cMapPacked = true;\n    PDFJS.workerSrc = '../src/worker_loader.js';\n    PDFJS.pdfjsNext = true;\n  } else {\n    PDFJS.cMapUrl = '../web/cmaps/';\n    PDFJS.cMapPacked = true;\n  }\n}\n\nconst DefaultExternalServices = {\n  updateFindControlState(data) {},\n  initPassiveLoading(callbacks) {},\n  fallback(data, callback) {},\n  reportTelemetry(data) {},\n  createDownloadManager() {\n    throw new Error('Not implemented: createDownloadManager');\n  },\n  createPreferences() {\n    throw new Error('Not implemented: createPreferences');\n  },\n  createL10n() {\n    throw new Error('Not implemented: createL10n');\n  },\n  supportsIntegratedFind: false,\n  supportsDocumentFonts: true,\n  supportsDocumentColors: true,\n  supportedMouseWheelZoomModifierKeys: {\n    ctrlKey: true,\n    metaKey: true,\n  },\n};\n\nlet PDFViewerApplication = {\n  initialBookmark: document.location.hash.substring(1),\n  initialDestination: null,\n  initialized: false,\n  fellback: false,\n  appConfig: null,\n  pdfDocument: null,\n  pdfLoadingTask: null,\n  printService: null,\n  /** @type {PDFViewer} */\n  pdfViewer: null,\n  /** @type {PDFThumbnailViewer} */\n  pdfThumbnailViewer: null,\n  /** @type {PDFRenderingQueue} */\n  pdfRenderingQueue: null,\n  /** @type {PDFPresentationMode} */\n  pdfPresentationMode: null,\n  /** @type {PDFDocumentProperties} */\n  pdfDocumentProperties: null,\n  /** @type {PDFLinkService} */\n  pdfLinkService: null,\n  /** @type {PDFHistory} */\n  pdfHistory: null,\n  /** @type {PDFSidebar} */\n  pdfSidebar: null,\n  /** @type {PDFOutlineViewer} */\n  pdfOutlineViewer: null,\n  /** @type {PDFAttachmentViewer} */\n  pdfAttachmentViewer: null,\n  /** @type {PDFCursorTools} */\n  pdfCursorTools: null,\n  /** @type {ViewHistory} */\n  store: null,\n  /** @type {DownloadManager} */\n  downloadManager: null,\n  /** @type {OverlayManager} */\n  overlayManager: null,\n  /** @type {Preferences} */\n  preferences: null,\n  /** @type {Toolbar} */\n  toolbar: null,\n  /** @type {SecondaryToolbar} */\n  secondaryToolbar: null,\n  /** @type {EventBus} */\n  eventBus: null,\n  /** @type {IL10n} */\n  l10n: null,\n  isInitialViewSet: false,\n  downloadComplete: false,\n  viewerPrefs: {\n    sidebarViewOnLoad: SidebarView.NONE,\n    pdfBugEnabled: false,\n    showPreviousViewOnLoad: true,\n    defaultZoomValue: '',\n    disablePageMode: false,\n    disablePageLabels: false,\n    renderer: 'canvas',\n    enhanceTextSelection: false,\n    renderInteractiveForms: false,\n    enablePrintAutoRotate: false,\n  },\n  isViewerEmbedded: (window.parent !== window),\n  url: '',\n  baseUrl: '',\n  externalServices: DefaultExternalServices,\n  _boundEvents: {},\n\n  // Called once when the document is loaded.\n  initialize(appConfig) {\n    this.preferences = this.externalServices.createPreferences();\n\n    configure(PDFJS);\n    this.appConfig = appConfig;\n\n    return this._readPreferences().then(() => {\n      return this._initializeL10n();\n    }).then(() => {\n      return this._initializeViewerComponents();\n    }).then(() => {\n      // Bind the various event handlers *after* the viewer has been\n      // initialized, to prevent errors if an event arrives too soon.\n      this.bindEvents();\n      this.bindWindowEvents();\n\n      // We can start UI localization now.\n      let appContainer = appConfig.appContainer || document.documentElement;\n      this.l10n.translate(appContainer).then(() => {\n        // Dispatch the 'localized' event on the `eventBus` once the viewer\n        // has been fully initialized and translated.\n        this.eventBus.dispatch('localized');\n      });\n\n      if (this.isViewerEmbedded && !PDFJS.isExternalLinkTargetSet()) {\n        // Prevent external links from \"replacing\" the viewer,\n        // when it's embedded in e.g. an iframe or an object.\n        PDFJS.externalLinkTarget = PDFJS.LinkTarget.TOP;\n      }\n\n      this.initialized = true;\n    });\n  },\n\n  /**\n   * @private\n   */\n  _readPreferences() {\n    let { preferences, viewerPrefs, } = this;\n\n    return Promise.all([\n      preferences.get('enableWebGL').then(function resolved(value) {\n        PDFJS.disableWebGL = !value;\n      }),\n      preferences.get('sidebarViewOnLoad').then(function resolved(value) {\n        viewerPrefs['sidebarViewOnLoad'] = value;\n      }),\n      preferences.get('pdfBugEnabled').then(function resolved(value) {\n        viewerPrefs['pdfBugEnabled'] = value;\n      }),\n      preferences.get('showPreviousViewOnLoad').then(function resolved(value) {\n        viewerPrefs['showPreviousViewOnLoad'] = value;\n      }),\n      preferences.get('defaultZoomValue').then(function resolved(value) {\n        viewerPrefs['defaultZoomValue'] = value;\n      }),\n      preferences.get('enhanceTextSelection').then(function resolved(value) {\n        viewerPrefs['enhanceTextSelection'] = value;\n      }),\n      preferences.get('disableTextLayer').then(function resolved(value) {\n        if (PDFJS.disableTextLayer === true) {\n          return;\n        }\n        PDFJS.disableTextLayer = value;\n      }),\n      preferences.get('disableRange').then(function resolved(value) {\n        if (PDFJS.disableRange === true) {\n          return;\n        }\n        PDFJS.disableRange = value;\n      }),\n      preferences.get('disableStream').then(function resolved(value) {\n        if (PDFJS.disableStream === true) {\n          return;\n        }\n        PDFJS.disableStream = value;\n      }),\n      preferences.get('disableAutoFetch').then(function resolved(value) {\n        PDFJS.disableAutoFetch = value;\n      }),\n      preferences.get('disableFontFace').then(function resolved(value) {\n        if (PDFJS.disableFontFace === true) {\n          return;\n        }\n        PDFJS.disableFontFace = value;\n      }),\n      preferences.get('useOnlyCssZoom').then(function resolved(value) {\n        PDFJS.useOnlyCssZoom = value;\n      }),\n      preferences.get('externalLinkTarget').then(function resolved(value) {\n        if (PDFJS.isExternalLinkTargetSet()) {\n          return;\n        }\n        PDFJS.externalLinkTarget = value;\n      }),\n      preferences.get('renderer').then(function resolved(value) {\n        viewerPrefs['renderer'] = value;\n      }),\n      preferences.get('renderInteractiveForms').then(function resolved(value) {\n        viewerPrefs['renderInteractiveForms'] = value;\n      }),\n      preferences.get('disablePageMode').then(function resolved(value) {\n        viewerPrefs['disablePageMode'] = value;\n      }),\n      preferences.get('disablePageLabels').then(function resolved(value) {\n        viewerPrefs['disablePageLabels'] = value;\n      }),\n      preferences.get('enablePrintAutoRotate').then(function resolved(value) {\n        viewerPrefs['enablePrintAutoRotate'] = value;\n      }),\n    ]).catch(function(reason) { });\n  },\n\n  _initializeL10n() {\n    // Locale can be changed only when special debugging flags is present in\n    // the hash section of the URL, or development version of viewer is used.\n    // It is not possible to change locale for Firefox extension builds.\n    if (typeof PDFJSDev === 'undefined' || !PDFJSDev.test('PRODUCTION') ||\n        (!PDFJSDev.test('FIREFOX || MOZCENTRAL') &&\n         this.viewerPrefs['pdfBugEnabled'])) {\n      let hash = document.location.hash.substring(1);\n      let hashParams = parseQueryString(hash);\n      if ('locale' in hashParams) {\n        PDFJS.locale = hashParams['locale'];\n      }\n    }\n    this.l10n = this.externalServices.createL10n();\n    return this.l10n.getDirection().then((dir) => {\n      document.getElementsByTagName('html')[0].dir = dir;\n    });\n  },\n\n  /**\n   * @private\n   */\n  _initializeViewerComponents() {\n    let appConfig = this.appConfig;\n\n    return new Promise((resolve, reject) => {\n      this.overlayManager = new OverlayManager();\n\n      let eventBus = appConfig.eventBus || getGlobalEventBus();\n      this.eventBus = eventBus;\n\n      let pdfRenderingQueue = new PDFRenderingQueue();\n      pdfRenderingQueue.onIdle = this.cleanup.bind(this);\n      this.pdfRenderingQueue = pdfRenderingQueue;\n\n      let pdfLinkService = new PDFLinkService({\n        eventBus,\n      });\n      this.pdfLinkService = pdfLinkService;\n\n      let downloadManager = this.externalServices.createDownloadManager();\n      this.downloadManager = downloadManager;\n\n      let container = appConfig.mainContainer;\n      let viewer = appConfig.viewerContainer;\n      this.pdfViewer = new PDFViewer({\n        container,\n        viewer,\n        eventBus,\n        renderingQueue: pdfRenderingQueue,\n        linkService: pdfLinkService,\n        downloadManager,\n        renderer: this.viewerPrefs['renderer'],\n        l10n: this.l10n,\n        enhanceTextSelection: this.viewerPrefs['enhanceTextSelection'],\n        renderInteractiveForms: this.viewerPrefs['renderInteractiveForms'],\n        enablePrintAutoRotate: this.viewerPrefs['enablePrintAutoRotate'],\n      });\n      pdfRenderingQueue.setViewer(this.pdfViewer);\n      pdfLinkService.setViewer(this.pdfViewer);\n\n      let thumbnailContainer = appConfig.sidebar.thumbnailView;\n      this.pdfThumbnailViewer = new PDFThumbnailViewer({\n        container: thumbnailContainer,\n        renderingQueue: pdfRenderingQueue,\n        linkService: pdfLinkService,\n        l10n: this.l10n,\n      });\n      pdfRenderingQueue.setThumbnailViewer(this.pdfThumbnailViewer);\n\n      this.pdfHistory = new PDFHistory({\n        linkService: pdfLinkService,\n        eventBus,\n      });\n      pdfLinkService.setHistory(this.pdfHistory);\n\n      this.findController = new PDFFindController({\n        pdfViewer: this.pdfViewer,\n      });\n      this.findController.onUpdateResultsCount = (matchCount) => {\n        if (this.supportsIntegratedFind) {\n          return;\n        }\n        this.findBar.updateResultsCount(matchCount);\n      };\n      this.findController.onUpdateState = (state, previous, matchCount) => {\n        if (this.supportsIntegratedFind) {\n          this.externalServices.updateFindControlState({\n            result: state,\n            findPrevious: previous,\n          });\n        } else {\n          this.findBar.updateUIState(state, previous, matchCount);\n        }\n      };\n\n      this.pdfViewer.setFindController(this.findController);\n\n      // TODO: improve `PDFFindBar` constructor parameter passing\n      let findBarConfig = Object.create(appConfig.findBar);\n      findBarConfig.findController = this.findController;\n      findBarConfig.eventBus = eventBus;\n      this.findBar = new PDFFindBar(findBarConfig, this.l10n);\n\n      this.pdfDocumentProperties =\n        new PDFDocumentProperties(appConfig.documentProperties,\n                                  this.overlayManager, this.l10n);\n\n      this.pdfCursorTools = new PDFCursorTools({\n        container,\n        eventBus,\n        preferences: this.preferences,\n      });\n\n      this.toolbar = new Toolbar(appConfig.toolbar, container, eventBus,\n                                 this.l10n);\n\n      this.secondaryToolbar =\n        new SecondaryToolbar(appConfig.secondaryToolbar, container, eventBus);\n\n      if (this.supportsFullscreen) {\n        this.pdfPresentationMode = new PDFPresentationMode({\n          container,\n          viewer,\n          pdfViewer: this.pdfViewer,\n          eventBus,\n          contextMenuItems: appConfig.fullscreen,\n        });\n      }\n\n      this.passwordPrompt = new PasswordPrompt(appConfig.passwordOverlay,\n                                               this.overlayManager, this.l10n);\n\n      this.pdfOutlineViewer = new PDFOutlineViewer({\n        container: appConfig.sidebar.outlineView,\n        eventBus,\n        linkService: pdfLinkService,\n      });\n\n      this.pdfAttachmentViewer = new PDFAttachmentViewer({\n        container: appConfig.sidebar.attachmentsView,\n        eventBus,\n        downloadManager,\n      });\n\n      // TODO: improve `PDFSidebar` constructor parameter passing\n      let sidebarConfig = Object.create(appConfig.sidebar);\n      sidebarConfig.pdfViewer = this.pdfViewer;\n      sidebarConfig.pdfThumbnailViewer = this.pdfThumbnailViewer;\n      sidebarConfig.pdfOutlineViewer = this.pdfOutlineViewer;\n      sidebarConfig.eventBus = eventBus;\n      this.pdfSidebar = new PDFSidebar(sidebarConfig, this.l10n);\n      this.pdfSidebar.onToggled = this.forceRendering.bind(this);\n\n      resolve(undefined);\n    });\n  },\n\n  run(config) {\n    this.initialize(config).then(webViewerInitialized);\n  },\n\n  zoomIn(ticks) {\n    let newScale = this.pdfViewer.currentScale;\n    do {\n      newScale = (newScale * DEFAULT_SCALE_DELTA).toFixed(2);\n      newScale = Math.ceil(newScale * 10) / 10;\n      newScale = Math.min(MAX_SCALE, newScale);\n    } while (--ticks > 0 && newScale < MAX_SCALE);\n    this.pdfViewer.currentScaleValue = newScale;\n  },\n\n  zoomOut(ticks) {\n    let newScale = this.pdfViewer.currentScale;\n    do {\n      newScale = (newScale / DEFAULT_SCALE_DELTA).toFixed(2);\n      newScale = Math.floor(newScale * 10) / 10;\n      newScale = Math.max(MIN_SCALE, newScale);\n    } while (--ticks > 0 && newScale > MIN_SCALE);\n    this.pdfViewer.currentScaleValue = newScale;\n  },\n\n  get pagesCount() {\n    return this.pdfDocument ? this.pdfDocument.numPages : 0;\n  },\n\n  get pageRotation() {\n    return this.pdfViewer.pagesRotation;\n  },\n\n  set page(val) {\n    this.pdfViewer.currentPageNumber = val;\n  },\n\n  get page() {\n    return this.pdfViewer.currentPageNumber;\n  },\n\n  get printing() {\n    return !!this.printService;\n  },\n\n  get supportsPrinting() {\n    return PDFPrintServiceFactory.instance.supportsPrinting;\n  },\n\n  get supportsFullscreen() {\n    let support;\n    if (typeof PDFJSDev !== 'undefined' && PDFJSDev.test('MOZCENTRAL')) {\n      support = document.fullscreenEnabled === true ||\n                document.mozFullScreenEnabled === true;\n    } else {\n      let doc = document.documentElement;\n      support = !!(doc.requestFullscreen || doc.mozRequestFullScreen ||\n                   doc.webkitRequestFullScreen || doc.msRequestFullscreen);\n\n      if (document.fullscreenEnabled === false ||\n          document.mozFullScreenEnabled === false ||\n          document.webkitFullscreenEnabled === false ||\n          document.msFullscreenEnabled === false) {\n        support = false;\n      }\n    }\n    if (support && PDFJS.disableFullscreen === true) {\n      support = false;\n    }\n\n    return shadow(this, 'supportsFullscreen', support);\n  },\n\n  get supportsIntegratedFind() {\n    return this.externalServices.supportsIntegratedFind;\n  },\n\n  get supportsDocumentFonts() {\n    return this.externalServices.supportsDocumentFonts;\n  },\n\n  get supportsDocumentColors() {\n    return this.externalServices.supportsDocumentColors;\n  },\n\n  get loadingBar() {\n    let bar = new ProgressBar('#loadingBar');\n    return shadow(this, 'loadingBar', bar);\n  },\n\n  get supportedMouseWheelZoomModifierKeys() {\n    return this.externalServices.supportedMouseWheelZoomModifierKeys;\n  },\n\n  initPassiveLoading() {\n    if (typeof PDFJSDev === 'undefined' ||\n        !PDFJSDev.test('FIREFOX || MOZCENTRAL || CHROME')) {\n      throw new Error('Not implemented: initPassiveLoading');\n    }\n    this.externalServices.initPassiveLoading({\n      onOpenWithTransport(url, length, transport) {\n        PDFViewerApplication.open(url, { range: transport, });\n\n        if (length) {\n          PDFViewerApplication.pdfDocumentProperties.setFileSize(length);\n        }\n      },\n      onOpenWithData(data) {\n        PDFViewerApplication.open(data);\n      },\n      onOpenWithURL(url, length, originalURL) {\n        let file = url, args = null;\n        if (length !== undefined) {\n          args = { length, };\n        }\n        if (originalURL !== undefined) {\n          file = { file: url, originalURL, };\n        }\n        PDFViewerApplication.open(file, args);\n      },\n      onError(err) {\n        PDFViewerApplication.l10n.get('loading_error', null,\n            'An error occurred while loading the PDF.').then((msg) => {\n          PDFViewerApplication.error(msg, err);\n        });\n      },\n      onProgress(loaded, total) {\n        PDFViewerApplication.progress(loaded / total);\n      },\n    });\n  },\n\n  setTitleUsingUrl(url) {\n    this.url = url;\n    this.baseUrl = url.split('#')[0];\n    let title = getPDFFileNameFromURL(url, '');\n    if (!title) {\n      try {\n        title = decodeURIComponent(getFilenameFromUrl(url)) || url;\n      } catch (ex) {\n        // decodeURIComponent may throw URIError,\n        // fall back to using the unprocessed url in that case\n        title = url;\n      }\n    }\n    this.setTitle(title);\n  },\n\n  setTitle(title) {\n    if (this.isViewerEmbedded) {\n      // Embedded PDF viewers should not be changing their parent page's title.\n      return;\n    }\n    document.title = title;\n  },\n\n  /**\n   * Closes opened PDF document.\n   * @returns {Promise} - Returns the promise, which is resolved when all\n   *                      destruction is completed.\n   */\n  close() {\n    let errorWrapper = this.appConfig.errorWrapper.container;\n    errorWrapper.setAttribute('hidden', 'true');\n\n    if (!this.pdfLoadingTask) {\n      return Promise.resolve();\n    }\n\n    let promise = this.pdfLoadingTask.destroy();\n    this.pdfLoadingTask = null;\n\n    if (this.pdfDocument) {\n      this.pdfDocument = null;\n\n      this.pdfThumbnailViewer.setDocument(null);\n      this.pdfViewer.setDocument(null);\n      this.pdfLinkService.setDocument(null, null);\n      this.pdfDocumentProperties.setDocument(null, null);\n    }\n    this.store = null;\n    this.isInitialViewSet = false;\n    this.downloadComplete = false;\n\n    this.pdfSidebar.reset();\n    this.pdfOutlineViewer.reset();\n    this.pdfAttachmentViewer.reset();\n\n    this.findController.reset();\n    this.findBar.reset();\n    this.toolbar.reset();\n    this.secondaryToolbar.reset();\n\n    if (typeof PDFBug !== 'undefined') {\n      PDFBug.cleanup();\n    }\n    return promise;\n  },\n\n  /**\n   * Opens PDF document specified by URL or array with additional arguments.\n   * @param {string|TypedArray|ArrayBuffer} file - PDF location or binary data.\n   * @param {Object} args - (optional) Additional arguments for the getDocument\n   *                        call, e.g. HTTP headers ('httpHeaders') or\n   *                        alternative data transport ('range').\n   * @returns {Promise} - Returns the promise, which is resolved when document\n   *                      is opened.\n   */\n  open(file, args) {\n    if ((typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) &&\n        (arguments.length > 2 || typeof args === 'number')) {\n      return Promise.reject(\n        new Error('Call of open() with obsolete signature.'));\n    }\n    if (this.pdfLoadingTask) {\n      // We need to destroy already opened document.\n      return this.close().then(() => {\n        // Reload the preferences if a document was previously opened.\n        this.preferences.reload();\n        // ... and repeat the open() call.\n        return this.open(file, args);\n      });\n    }\n\n    let parameters = Object.create(null), scale;\n    if (typeof file === 'string') { // URL\n      this.setTitleUsingUrl(file);\n      parameters.url = file;\n    } else if (file && 'byteLength' in file) { // ArrayBuffer\n      parameters.data = file;\n    } else if (file.url && file.originalUrl) {\n      this.setTitleUsingUrl(file.originalUrl);\n      parameters.url = file.url;\n    }\n    if (typeof PDFJSDev !== 'undefined' &&\n        PDFJSDev.test('FIREFOX || MOZCENTRAL || CHROME')) {\n      parameters.docBaseUrl = this.baseUrl;\n    }\n\n    if (args) {\n      for (let prop in args) {\n        parameters[prop] = args[prop];\n      }\n\n      if (args.scale) {\n        scale = args.scale;\n      }\n      if (args.length) {\n        this.pdfDocumentProperties.setFileSize(args.length);\n      }\n    }\n\n    let loadingTask = getDocument(parameters);\n    this.pdfLoadingTask = loadingTask;\n\n    loadingTask.onPassword = (updateCallback, reason) => {\n      this.passwordPrompt.setUpdateCallback(updateCallback, reason);\n      this.passwordPrompt.open();\n    };\n\n    loadingTask.onProgress = ({ loaded, total, }) => {\n      this.progress(loaded / total);\n    };\n\n    // Listen for unsupported features to trigger the fallback UI.\n    loadingTask.onUnsupportedFeature = this.fallback.bind(this);\n\n    return loadingTask.promise.then((pdfDocument) => {\n      this.load(pdfDocument, scale);\n    }, (exception) => {\n      let message = exception && exception.message;\n      let loadingErrorMessage;\n      if (exception instanceof InvalidPDFException) {\n        // change error message also for other builds\n        loadingErrorMessage = this.l10n.get('invalid_file_error', null,\n                                            'Invalid or corrupted PDF file.');\n      } else if (exception instanceof MissingPDFException) {\n        // special message for missing PDF's\n        loadingErrorMessage = this.l10n.get('missing_file_error', null,\n                                            'Missing PDF file.');\n      } else if (exception instanceof UnexpectedResponseException) {\n        loadingErrorMessage = this.l10n.get('unexpected_response_error', null,\n                                            'Unexpected server response.');\n      } else {\n        loadingErrorMessage = this.l10n.get('loading_error', null,\n          'An error occurred while loading the PDF.');\n      }\n\n      return loadingErrorMessage.then((msg) => {\n        this.error(msg, { message, });\n        throw new Error(msg);\n      });\n    });\n  },\n\n  download() {\n    function downloadByUrl() {\n      downloadManager.downloadUrl(url, filename);\n    }\n\n    let url = this.baseUrl;\n    // Use this.url instead of this.baseUrl to perform filename detection based\n    // on the reference fragment as ultimate fallback if needed.\n    let filename = getPDFFileNameFromURL(this.url);\n    let downloadManager = this.downloadManager;\n    downloadManager.onerror = (err) => {\n      // This error won't really be helpful because it's likely the\n      // fallback won't work either (or is already open).\n      this.error(`PDF failed to download: ${err}`);\n    };\n\n    // When the PDF document isn't ready, or the PDF file is still downloading,\n    // simply download using the URL.\n    if (!this.pdfDocument || !this.downloadComplete) {\n      downloadByUrl();\n      return;\n    }\n\n    this.pdfDocument.getData().then(function(data) {\n      let blob = createBlob(data, 'application/pdf');\n      downloadManager.download(blob, url, filename);\n    }).catch(downloadByUrl); // Error occurred, try downloading with the URL.\n  },\n\n  fallback(featureId) {\n    if (typeof PDFJSDev !== 'undefined' &&\n        PDFJSDev.test('FIREFOX || MOZCENTRAL')) {\n      // Only trigger the fallback once so we don't spam the user with messages\n      // for one PDF.\n      if (this.fellback) {\n        return;\n      }\n      this.fellback = true;\n      this.externalServices.fallback({\n        featureId,\n        url: this.baseUrl,\n      }, function response(download) {\n        if (!download) {\n          return;\n        }\n        PDFViewerApplication.download();\n      });\n    }\n  },\n\n  /**\n   * Show the error box.\n   * @param {String} message A message that is human readable.\n   * @param {Object} moreInfo (optional) Further information about the error\n   *                            that is more technical.  Should have a 'message'\n   *                            and optionally a 'stack' property.\n   */\n  error(message, moreInfo) {\n    let moreInfoText = [this.l10n.get('error_version_info',\n      { version: version || '?', build: build || '?', },\n      'PDF.js v{{version}} (build: {{build}})')];\n    if (moreInfo) {\n      moreInfoText.push(\n        this.l10n.get('error_message', { message: moreInfo.message, },\n                      'Message: {{message}}'));\n      if (moreInfo.stack) {\n        moreInfoText.push(\n          this.l10n.get('error_stack', { stack: moreInfo.stack, },\n                        'Stack: {{stack}}'));\n      } else {\n        if (moreInfo.filename) {\n          moreInfoText.push(\n            this.l10n.get('error_file', { file: moreInfo.filename, },\n                          'File: {{file}}'));\n        }\n        if (moreInfo.lineNumber) {\n          moreInfoText.push(\n            this.l10n.get('error_line', { line: moreInfo.lineNumber, },\n                          'Line: {{line}}'));\n        }\n      }\n    }\n\n    if (typeof PDFJSDev === 'undefined' ||\n        !PDFJSDev.test('FIREFOX || MOZCENTRAL')) {\n      let errorWrapperConfig = this.appConfig.errorWrapper;\n      let errorWrapper = errorWrapperConfig.container;\n      errorWrapper.removeAttribute('hidden');\n\n      let errorMessage = errorWrapperConfig.errorMessage;\n      errorMessage.textContent = message;\n\n      let closeButton = errorWrapperConfig.closeButton;\n      closeButton.onclick = function() {\n        errorWrapper.setAttribute('hidden', 'true');\n      };\n\n      let errorMoreInfo = errorWrapperConfig.errorMoreInfo;\n      let moreInfoButton = errorWrapperConfig.moreInfoButton;\n      let lessInfoButton = errorWrapperConfig.lessInfoButton;\n      moreInfoButton.onclick = function() {\n        errorMoreInfo.removeAttribute('hidden');\n        moreInfoButton.setAttribute('hidden', 'true');\n        lessInfoButton.removeAttribute('hidden');\n        errorMoreInfo.style.height = errorMoreInfo.scrollHeight + 'px';\n      };\n      lessInfoButton.onclick = function() {\n        errorMoreInfo.setAttribute('hidden', 'true');\n        moreInfoButton.removeAttribute('hidden');\n        lessInfoButton.setAttribute('hidden', 'true');\n      };\n      moreInfoButton.oncontextmenu = noContextMenuHandler;\n      lessInfoButton.oncontextmenu = noContextMenuHandler;\n      closeButton.oncontextmenu = noContextMenuHandler;\n      moreInfoButton.removeAttribute('hidden');\n      lessInfoButton.setAttribute('hidden', 'true');\n      Promise.all(moreInfoText).then((parts) => {\n        errorMoreInfo.value = parts.join('\\n');\n      });\n    } else {\n      console.error(message + '\\n' + moreInfoText);\n      this.fallback();\n    }\n  },\n\n  progress(level) {\n    if (this.downloadComplete) {\n      // Don't accidentally show the loading bar again when the entire file has\n      // already been fetched (only an issue when disableAutoFetch is enabled).\n      return;\n    }\n    let percent = Math.round(level * 100);\n    // When we transition from full request to range requests, it's possible\n    // that we discard some of the loaded data. This can cause the loading\n    // bar to move backwards. So prevent this by only updating the bar if it\n    // increases.\n    if (percent > this.loadingBar.percent || isNaN(percent)) {\n      this.loadingBar.percent = percent;\n\n      // When disableAutoFetch is enabled, it's not uncommon for the entire file\n      // to never be fetched (depends on e.g. the file structure). In this case\n      // the loading bar will not be completely filled, nor will it be hidden.\n      // To prevent displaying a partially filled loading bar permanently, we\n      // hide it when no data has been loaded during a certain amount of time.\n      if (PDFJS.disableAutoFetch && percent) {\n        if (this.disableAutoFetchLoadingBarTimeout) {\n          clearTimeout(this.disableAutoFetchLoadingBarTimeout);\n          this.disableAutoFetchLoadingBarTimeout = null;\n        }\n        this.loadingBar.show();\n\n        this.disableAutoFetchLoadingBarTimeout = setTimeout(() => {\n          this.loadingBar.hide();\n          this.disableAutoFetchLoadingBarTimeout = null;\n        }, DISABLE_AUTO_FETCH_LOADING_BAR_TIMEOUT);\n      }\n    }\n  },\n\n  load(pdfDocument, scale) {\n    scale = scale || UNKNOWN_SCALE;\n    this.pdfDocument = pdfDocument;\n\n    pdfDocument.getDownloadInfo().then(() => {\n      this.downloadComplete = true;\n      this.loadingBar.hide();\n\n      firstPagePromise.then(() => {\n        this.eventBus.dispatch('documentload', { source: this, });\n      });\n    });\n\n    // Since the `setInitialView` call below depends on this being resolved,\n    // fetch it early to avoid delaying initial rendering of the PDF document.\n    let pageModePromise = pdfDocument.getPageMode().catch(\n      function() { /* Avoid breaking initial rendering; ignoring errors. */ });\n\n    this.toolbar.setPagesCount(pdfDocument.numPages, false);\n    this.secondaryToolbar.setPagesCount(pdfDocument.numPages);\n\n    let id = this.documentFingerprint = pdfDocument.fingerprint;\n    let store = this.store = new ViewHistory(id);\n\n    let baseDocumentUrl;\n    if (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {\n      baseDocumentUrl = null;\n    } else if (PDFJSDev.test('FIREFOX || MOZCENTRAL')) {\n      baseDocumentUrl = this.baseUrl;\n    } else if (PDFJSDev.test('CHROME')) {\n      baseDocumentUrl = location.href.split('#')[0];\n    }\n    this.pdfLinkService.setDocument(pdfDocument, baseDocumentUrl);\n    this.pdfDocumentProperties.setDocument(pdfDocument, this.url);\n\n    let pdfViewer = this.pdfViewer;\n    pdfViewer.setDocument(pdfDocument);\n    let firstPagePromise = pdfViewer.firstPagePromise;\n    let pagesPromise = pdfViewer.pagesPromise;\n    let onePageRendered = pdfViewer.onePageRendered;\n\n    let pdfThumbnailViewer = this.pdfThumbnailViewer;\n    pdfThumbnailViewer.setDocument(pdfDocument);\n\n    firstPagePromise.then((pdfPage) => {\n      this.loadingBar.setWidth(this.appConfig.viewerContainer);\n\n      if (!PDFJS.disableHistory && !this.isViewerEmbedded) {\n        // The browsing history is only enabled when the viewer is standalone,\n        // i.e. not when it is embedded in a web page.\n        if (!this.viewerPrefs['showPreviousViewOnLoad']) {\n          this.pdfHistory.clearHistoryState();\n        }\n        this.pdfHistory.initialize(this.documentFingerprint);\n\n        if (this.pdfHistory.initialDestination) {\n          this.initialDestination = this.pdfHistory.initialDestination;\n        } else if (this.pdfHistory.initialBookmark) {\n          this.initialBookmark = this.pdfHistory.initialBookmark;\n        }\n      }\n\n      let initialParams = {\n        destination: this.initialDestination,\n        bookmark: this.initialBookmark,\n        hash: null,\n      };\n      let storePromise = store.getMultiple({\n        exists: false,\n        page: '1',\n        zoom: DEFAULT_SCALE_VALUE,\n        scrollLeft: '0',\n        scrollTop: '0',\n        sidebarView: SidebarView.NONE,\n      }).catch(() => { /* Unable to read from storage; ignoring errors. */ });\n\n      Promise.all([storePromise, pageModePromise]).then(\n          ([values = {}, pageMode]) => {\n        // Initialize the default values, from user preferences.\n        let hash = this.viewerPrefs['defaultZoomValue'] ?\n          ('zoom=' + this.viewerPrefs['defaultZoomValue']) : null;\n        let sidebarView = this.viewerPrefs['sidebarViewOnLoad'];\n\n        if (values.exists && this.viewerPrefs['showPreviousViewOnLoad']) {\n          hash = 'page=' + values.page +\n            '&zoom=' + (this.viewerPrefs['defaultZoomValue'] || values.zoom) +\n            ',' + values.scrollLeft + ',' + values.scrollTop;\n          sidebarView = sidebarView || (values.sidebarView | 0);\n        }\n        if (pageMode && !this.viewerPrefs['disablePageMode']) {\n          // Always let the user preference/history take precedence.\n          sidebarView = sidebarView || apiPageModeToSidebarView(pageMode);\n        }\n        return {\n          hash,\n          sidebarView,\n        };\n      }).then(({ hash, sidebarView, }) => {\n        this.setInitialView(hash, { sidebarView, scale, });\n        initialParams.hash = hash;\n\n        // Make all navigation keys work on document load,\n        // unless the viewer is embedded in a web page.\n        if (!this.isViewerEmbedded) {\n          pdfViewer.focus();\n        }\n        return pagesPromise;\n      }).then(() => {\n        // For documents with different page sizes, once all pages are resolved,\n        // ensure that the correct location becomes visible on load.\n        if (!initialParams.destination && !initialParams.bookmark &&\n            !initialParams.hash) {\n          return;\n        }\n        if (pdfViewer.hasEqualPageSizes) {\n          return;\n        }\n        this.initialDestination = initialParams.destination;\n        this.initialBookmark = initialParams.bookmark;\n\n        pdfViewer.currentScaleValue = pdfViewer.currentScaleValue;\n        this.setInitialView(initialParams.hash);\n      }).then(function() {\n        // At this point, rendering of the initial page(s) should always have\n        // started (and may even have completed).\n        // To prevent any future issues, e.g. the document being completely\n        // blank on load, always trigger rendering here.\n        pdfViewer.update();\n      });\n    });\n\n    pdfDocument.getPageLabels().then((labels) => {\n      if (!labels || this.viewerPrefs['disablePageLabels']) {\n        return;\n      }\n      let i = 0, numLabels = labels.length;\n      if (numLabels !== this.pagesCount) {\n        console.error('The number of Page Labels does not match ' +\n                      'the number of pages in the document.');\n        return;\n      }\n      // Ignore page labels that correspond to standard page numbering.\n      while (i < numLabels && labels[i] === (i + 1).toString()) {\n        i++;\n      }\n      if (i === numLabels) {\n        return;\n      }\n\n      pdfViewer.setPageLabels(labels);\n      pdfThumbnailViewer.setPageLabels(labels);\n\n      // Changing toolbar page display to use labels and we need to set\n      // the label of the current page.\n      this.toolbar.setPagesCount(pdfDocument.numPages, true);\n      this.toolbar.setPageNumber(pdfViewer.currentPageNumber,\n                                 pdfViewer.currentPageLabel);\n    });\n\n    pagesPromise.then(() => {\n      if (!this.supportsPrinting) {\n        return;\n      }\n      pdfDocument.getJavaScript().then((javaScript) => {\n        if (javaScript.length) {\n          console.warn('Warning: JavaScript is not supported');\n          this.fallback(UNSUPPORTED_FEATURES.javaScript);\n        }\n        // Hack to support auto printing.\n        let regex = /\\bprint\\s*\\(/;\n        for (let i = 0, ii = javaScript.length; i < ii; i++) {\n          let js = javaScript[i];\n          if (js && regex.test(js)) {\n            setTimeout(function() {\n              window.print();\n            });\n            return;\n          }\n        }\n      });\n    });\n\n    Promise.all([onePageRendered, animationStarted]).then(() => {\n      pdfDocument.getOutline().then((outline) => {\n        this.pdfOutlineViewer.render({ outline, });\n      });\n      pdfDocument.getAttachments().then((attachments) => {\n        this.pdfAttachmentViewer.render({ attachments, });\n      });\n    });\n\n    pdfDocument.getMetadata().then(({ info, metadata, }) => {\n      this.documentInfo = info;\n      this.metadata = metadata;\n\n      // Provides some basic debug information\n      console.log('PDF ' + pdfDocument.fingerprint + ' [' +\n                  info.PDFFormatVersion + ' ' + (info.Producer || '-').trim() +\n                  ' / ' + (info.Creator || '-').trim() + ']' +\n                  ' (PDF.js: ' + (version || '-') +\n                  (!PDFJS.disableWebGL ? ' [WebGL]' : '') + ')');\n\n      let pdfTitle;\n      if (metadata && metadata.has('dc:title')) {\n        let title = metadata.get('dc:title');\n        // Ghostscript sometimes return 'Untitled', sets the title to 'Untitled'\n        if (title !== 'Untitled') {\n          pdfTitle = title;\n        }\n      }\n\n      if (!pdfTitle && info && info['Title']) {\n        pdfTitle = info['Title'];\n      }\n\n      if (pdfTitle) {\n        this.setTitle(pdfTitle + ' - ' + document.title);\n      }\n\n      if (info.IsAcroFormPresent) {\n        console.warn('Warning: AcroForm/XFA is not supported');\n        this.fallback(UNSUPPORTED_FEATURES.forms);\n      }\n\n      if (typeof PDFJSDev !== 'undefined' &&\n          PDFJSDev.test('FIREFOX || MOZCENTRAL')) {\n        let versionId = String(info.PDFFormatVersion).slice(-1) | 0;\n        let generatorId = 0;\n        const KNOWN_GENERATORS = [\n          'acrobat distiller', 'acrobat pdfwriter', 'adobe livecycle',\n          'adobe pdf library', 'adobe photoshop', 'ghostscript', 'tcpdf',\n          'cairo', 'dvipdfm', 'dvips', 'pdftex', 'pdfkit', 'itext', 'prince',\n          'quarkxpress', 'mac os x', 'microsoft', 'openoffice', 'oracle',\n          'luradocument', 'pdf-xchange', 'antenna house', 'aspose.cells', 'fpdf'\n        ];\n        if (info.Producer) {\n          KNOWN_GENERATORS.some(function (generator, s, i) {\n            if (generator.indexOf(s) < 0) {\n              return false;\n            }\n            generatorId = i + 1;\n            return true;\n          }.bind(null, info.Producer.toLowerCase()));\n        }\n        let formType = !info.IsAcroFormPresent ? null : info.IsXFAPresent ?\n                      'xfa' : 'acroform';\n        this.externalServices.reportTelemetry({\n          type: 'documentInfo',\n          version: versionId,\n          generator: generatorId,\n          formType,\n        });\n      }\n    });\n  },\n\n  setInitialView(storedHash, options = {}) {\n    let { scale = 0, sidebarView = SidebarView.NONE, } = options;\n\n    this.isInitialViewSet = true;\n    this.pdfSidebar.setInitialView(sidebarView);\n\n    if (this.initialDestination) {\n      this.pdfLinkService.navigateTo(this.initialDestination);\n      this.initialDestination = null;\n    } else if (this.initialBookmark) {\n      this.pdfLinkService.setHash(this.initialBookmark);\n      this.pdfHistory.push({ hash: this.initialBookmark, }, true);\n      this.initialBookmark = null;\n    } else if (storedHash) {\n      this.pdfLinkService.setHash(storedHash);\n    } else if (scale) {\n      this.pdfViewer.currentScaleValue = scale;\n      this.page = 1;\n    }\n\n    // Ensure that the correct page number is displayed in the UI,\n    // even if the active page didn't change during document load.\n    this.toolbar.setPageNumber(this.pdfViewer.currentPageNumber,\n                               this.pdfViewer.currentPageLabel);\n    this.secondaryToolbar.setPageNumber(this.pdfViewer.currentPageNumber);\n\n    if (!this.pdfViewer.currentScaleValue) {\n      // Scale was not initialized: invalid bookmark or scale was not specified.\n      // Setting the default one.\n      this.pdfViewer.currentScaleValue = DEFAULT_SCALE_VALUE;\n    }\n  },\n\n  cleanup() {\n    if (!this.pdfDocument) {\n      return; // run cleanup when document is loaded\n    }\n    this.pdfViewer.cleanup();\n    this.pdfThumbnailViewer.cleanup();\n\n    // We don't want to remove fonts used by active page SVGs.\n    if (this.pdfViewer.renderer !== RendererType.SVG) {\n      this.pdfDocument.cleanup();\n    }\n  },\n\n  forceRendering() {\n    this.pdfRenderingQueue.printing = this.printing;\n    this.pdfRenderingQueue.isThumbnailViewEnabled =\n      this.pdfSidebar.isThumbnailViewVisible;\n    this.pdfRenderingQueue.renderHighestPriority();\n  },\n\n  beforePrint() {\n    if (this.printService) {\n      // There is no way to suppress beforePrint/afterPrint events,\n      // but PDFPrintService may generate double events -- this will ignore\n      // the second event that will be coming from native window.print().\n      return;\n    }\n\n    if (!this.supportsPrinting) {\n      this.l10n.get('printing_not_supported', null,\n                    'Warning: Printing is not fully supported by ' +\n                    'this browser.').then((printMessage) => {\n        this.error(printMessage);\n      });\n      return;\n    }\n\n    // The beforePrint is a sync method and we need to know layout before\n    // returning from this method. Ensure that we can get sizes of the pages.\n    if (!this.pdfViewer.pageViewsReady) {\n      this.l10n.get('printing_not_ready', null,\n                    'Warning: The PDF is not fully loaded for printing.').\n          then((notReadyMessage) => {\n        window.alert(notReadyMessage);\n      });\n      return;\n    }\n\n    let pagesOverview = this.pdfViewer.getPagesOverview();\n    let printContainer = this.appConfig.printContainer;\n    let printService = PDFPrintServiceFactory.instance.createPrintService(\n      this.pdfDocument, pagesOverview, printContainer, this.l10n);\n    this.printService = printService;\n    this.forceRendering();\n\n    printService.layout();\n\n    if (typeof PDFJSDev !== 'undefined' &&\n        PDFJSDev.test('FIREFOX || MOZCENTRAL')) {\n      this.externalServices.reportTelemetry({\n        type: 'print',\n      });\n    }\n  },\n\n  afterPrint: function pdfViewSetupAfterPrint() {\n    if (this.printService) {\n      this.printService.destroy();\n      this.printService = null;\n    }\n    this.forceRendering();\n  },\n\n  rotatePages(delta) {\n    if (!this.pdfDocument) {\n      return;\n    }\n    let { pdfViewer, pdfThumbnailViewer, } = this;\n    let pageNumber = pdfViewer.currentPageNumber;\n    let newRotation = (pdfViewer.pagesRotation + 360 + delta) % 360;\n\n    pdfViewer.pagesRotation = newRotation;\n    pdfThumbnailViewer.pagesRotation = newRotation;\n\n    this.forceRendering();\n    // Ensure that the active page doesn't change during rotation.\n    pdfViewer.currentPageNumber = pageNumber;\n  },\n\n  requestPresentationMode() {\n    if (!this.pdfPresentationMode) {\n      return;\n    }\n    this.pdfPresentationMode.request();\n  },\n\n  bindEvents() {\n    let { eventBus, _boundEvents, } = this;\n\n    _boundEvents.beforePrint = this.beforePrint.bind(this);\n    _boundEvents.afterPrint = this.afterPrint.bind(this);\n\n    eventBus.on('resize', webViewerResize);\n    eventBus.on('hashchange', webViewerHashchange);\n    eventBus.on('beforeprint', _boundEvents.beforePrint);\n    eventBus.on('afterprint', _boundEvents.afterPrint);\n    eventBus.on('pagerendered', webViewerPageRendered);\n    eventBus.on('textlayerrendered', webViewerTextLayerRendered);\n    eventBus.on('updateviewarea', webViewerUpdateViewarea);\n    eventBus.on('pagechanging', webViewerPageChanging);\n    eventBus.on('scalechanging', webViewerScaleChanging);\n    eventBus.on('sidebarviewchanged', webViewerSidebarViewChanged);\n    eventBus.on('pagemode', webViewerPageMode);\n    eventBus.on('namedaction', webViewerNamedAction);\n    eventBus.on('presentationmodechanged', webViewerPresentationModeChanged);\n    eventBus.on('presentationmode', webViewerPresentationMode);\n    eventBus.on('openfile', webViewerOpenFile);\n    eventBus.on('print', webViewerPrint);\n    eventBus.on('download', webViewerDownload);\n    eventBus.on('firstpage', webViewerFirstPage);\n    eventBus.on('lastpage', webViewerLastPage);\n    eventBus.on('nextpage', webViewerNextPage);\n    eventBus.on('previouspage', webViewerPreviousPage);\n    eventBus.on('zoomin', webViewerZoomIn);\n    eventBus.on('zoomout', webViewerZoomOut);\n    eventBus.on('pagenumberchanged', webViewerPageNumberChanged);\n    eventBus.on('scalechanged', webViewerScaleChanged);\n    eventBus.on('rotatecw', webViewerRotateCw);\n    eventBus.on('rotateccw', webViewerRotateCcw);\n    eventBus.on('documentproperties', webViewerDocumentProperties);\n    eventBus.on('find', webViewerFind);\n    eventBus.on('findfromurlhash', webViewerFindFromUrlHash);\n    if (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {\n      eventBus.on('fileinputchange', webViewerFileInputChange);\n    }\n  },\n\n  bindWindowEvents() {\n    let { eventBus, _boundEvents, } = this;\n\n    _boundEvents.windowResize = () => {\n      eventBus.dispatch('resize');\n    };\n    _boundEvents.windowHashChange = () => {\n      eventBus.dispatch('hashchange', {\n        hash: document.location.hash.substring(1),\n      });\n    };\n    _boundEvents.windowBeforePrint = () => {\n      eventBus.dispatch('beforeprint');\n    };\n    _boundEvents.windowAfterPrint = () => {\n      eventBus.dispatch('afterprint');\n    };\n\n    window.addEventListener('wheel', webViewerWheel);\n    window.addEventListener('click', webViewerClick);\n    window.addEventListener('keydown', webViewerKeyDown);\n    window.addEventListener('resize', _boundEvents.windowResize);\n    window.addEventListener('hashchange', _boundEvents.windowHashChange);\n    window.addEventListener('beforeprint', _boundEvents.windowBeforePrint);\n    window.addEventListener('afterprint', _boundEvents.windowAfterPrint);\n    if (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {\n      _boundEvents.windowChange = (evt) => {\n        let files = evt.target.files;\n        if (!files || files.length === 0) {\n          return;\n        }\n        eventBus.dispatch('fileinputchange', {\n          fileInput: evt.target,\n        });\n      };\n      window.addEventListener('change', _boundEvents.windowChange);\n    }\n  },\n\n  unbindEvents() {\n    let { eventBus, _boundEvents, } = this;\n\n    eventBus.off('resize', webViewerResize);\n    eventBus.off('hashchange', webViewerHashchange);\n    eventBus.off('beforeprint', _boundEvents.beforePrint);\n    eventBus.off('afterprint', _boundEvents.afterPrint);\n    eventBus.off('pagerendered', webViewerPageRendered);\n    eventBus.off('textlayerrendered', webViewerTextLayerRendered);\n    eventBus.off('updateviewarea', webViewerUpdateViewarea);\n    eventBus.off('pagechanging', webViewerPageChanging);\n    eventBus.off('scalechanging', webViewerScaleChanging);\n    eventBus.off('sidebarviewchanged', webViewerSidebarViewChanged);\n    eventBus.off('pagemode', webViewerPageMode);\n    eventBus.off('namedaction', webViewerNamedAction);\n    eventBus.off('presentationmodechanged', webViewerPresentationModeChanged);\n    eventBus.off('presentationmode', webViewerPresentationMode);\n    eventBus.off('openfile', webViewerOpenFile);\n    eventBus.off('print', webViewerPrint);\n    eventBus.off('download', webViewerDownload);\n    eventBus.off('firstpage', webViewerFirstPage);\n    eventBus.off('lastpage', webViewerLastPage);\n    eventBus.off('nextpage', webViewerNextPage);\n    eventBus.off('previouspage', webViewerPreviousPage);\n    eventBus.off('zoomin', webViewerZoomIn);\n    eventBus.off('zoomout', webViewerZoomOut);\n    eventBus.off('pagenumberchanged', webViewerPageNumberChanged);\n    eventBus.off('scalechanged', webViewerScaleChanged);\n    eventBus.off('rotatecw', webViewerRotateCw);\n    eventBus.off('rotateccw', webViewerRotateCcw);\n    eventBus.off('documentproperties', webViewerDocumentProperties);\n    eventBus.off('find', webViewerFind);\n    eventBus.off('findfromurlhash', webViewerFindFromUrlHash);\n    if (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {\n      eventBus.off('fileinputchange', webViewerFileInputChange);\n    }\n\n    _boundEvents.beforePrint = null;\n    _boundEvents.afterPrint = null;\n  },\n\n  unbindWindowEvents() {\n    let { _boundEvents, } = this;\n\n    window.removeEventListener('wheel', webViewerWheel);\n    window.removeEventListener('click', webViewerClick);\n    window.removeEventListener('keydown', webViewerKeyDown);\n    window.removeEventListener('resize', _boundEvents.windowResize);\n    window.removeEventListener('hashchange', _boundEvents.windowHashChange);\n    window.removeEventListener('beforeprint', _boundEvents.windowBeforePrint);\n    window.removeEventListener('afterprint', _boundEvents.windowAfterPrint);\n    if (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {\n      window.removeEventListener('change', _boundEvents.windowChange);\n      _boundEvents.windowChange = null;\n    }\n\n    _boundEvents.windowResize = null;\n    _boundEvents.windowHashChange = null;\n    _boundEvents.windowBeforePrint = null;\n    _boundEvents.windowAfterPrint = null;\n  },\n};\n\nlet validateFileURL;\nif (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {\n  const HOSTED_VIEWER_ORIGINS = ['null',\n    'http://mozilla.github.io', 'https://mozilla.github.io'];\n  validateFileURL = function validateFileURL(file) {\n    if (file === undefined) {\n      return;\n    }\n    try {\n      let viewerOrigin = new URL(window.location.href).origin || 'null';\n      if (HOSTED_VIEWER_ORIGINS.indexOf(viewerOrigin) >= 0) {\n        // Hosted or local viewer, allow for any file locations\n        return;\n      }\n      let fileOrigin = new URL(file, window.location.href).origin;\n      // Removing of the following line will not guarantee that the viewer will\n      // start accepting URLs from foreign origin -- CORS headers on the remote\n      // server must be properly configured.\n      if (fileOrigin !== viewerOrigin) {\n        throw new Error('file origin does not match viewer\\'s');\n      }\n    } catch (ex) {\n      let message = ex && ex.message;\n      PDFViewerApplication.l10n.get('loading_error', null,\n          'An error occurred while loading the PDF.').\n          then((loadingErrorMessage) => {\n        PDFViewerApplication.error(loadingErrorMessage, { message, });\n      });\n      throw ex;\n    }\n  };\n}\n\nfunction loadAndEnablePDFBug(enabledTabs) {\n  return new Promise(function (resolve, reject) {\n    let appConfig = PDFViewerApplication.appConfig;\n    let script = document.createElement('script');\n    script.src = appConfig.debuggerScriptPath;\n    script.onload = function () {\n      PDFBug.enable(enabledTabs);\n      PDFBug.init({\n        PDFJS,\n        OPS,\n      }, appConfig.mainContainer);\n      resolve();\n    };\n    script.onerror = function () {\n      reject(new Error('Cannot load debugger at ' + script.src));\n    };\n    (document.getElementsByTagName('head')[0] || document.body).\n      appendChild(script);\n  });\n}\n\nfunction webViewerInitialized() {\n  let appConfig = PDFViewerApplication.appConfig;\n  let file;\n  if (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {\n    let queryString = document.location.search.substring(1);\n    let params = parseQueryString(queryString);\n    file = 'file' in params ? params.file : appConfig.defaultUrl;\n    validateFileURL(file);\n  } else if (PDFJSDev.test('FIREFOX || MOZCENTRAL')) {\n    file = window.location.href.split('#')[0];\n  } else if (PDFJSDev.test('CHROME')) {\n    file = appConfig.defaultUrl;\n  }\n\n  let waitForBeforeOpening = [];\n  if (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {\n    let fileInput = document.createElement('input');\n    fileInput.id = appConfig.openFileInputName;\n    fileInput.className = 'fileInput';\n    fileInput.setAttribute('type', 'file');\n    fileInput.oncontextmenu = noContextMenuHandler;\n    document.body.appendChild(fileInput);\n\n    if (!window.File || !window.FileReader ||\n        !window.FileList || !window.Blob) {\n      appConfig.toolbar.openFile.setAttribute('hidden', 'true');\n      appConfig.secondaryToolbar.openFileButton.setAttribute('hidden', 'true');\n    } else {\n      fileInput.value = null;\n    }\n  } else {\n    appConfig.toolbar.openFile.setAttribute('hidden', 'true');\n    appConfig.secondaryToolbar.openFileButton.setAttribute('hidden', 'true');\n  }\n\n  if ((typeof PDFJSDev === 'undefined' || !PDFJSDev.test('PRODUCTION')) ||\n      PDFViewerApplication.viewerPrefs['pdfBugEnabled']) {\n    // Special debugging flags in the hash section of the URL.\n    let hash = document.location.hash.substring(1);\n    let hashParams = parseQueryString(hash);\n\n    if ('disableworker' in hashParams) {\n      PDFJS.disableWorker = (hashParams['disableworker'] === 'true');\n    }\n    if ('disablerange' in hashParams) {\n      PDFJS.disableRange = (hashParams['disablerange'] === 'true');\n    }\n    if ('disablestream' in hashParams) {\n      PDFJS.disableStream = (hashParams['disablestream'] === 'true');\n    }\n    if ('disableautofetch' in hashParams) {\n      PDFJS.disableAutoFetch = (hashParams['disableautofetch'] === 'true');\n    }\n    if ('disablefontface' in hashParams) {\n      PDFJS.disableFontFace = (hashParams['disablefontface'] === 'true');\n    }\n    if ('disablehistory' in hashParams) {\n      PDFJS.disableHistory = (hashParams['disablehistory'] === 'true');\n    }\n    if ('webgl' in hashParams) {\n      PDFJS.disableWebGL = (hashParams['webgl'] !== 'true');\n    }\n    if ('useonlycsszoom' in hashParams) {\n      PDFJS.useOnlyCssZoom = (hashParams['useonlycsszoom'] === 'true');\n    }\n    if ('verbosity' in hashParams) {\n      PDFJS.verbosity = hashParams['verbosity'] | 0;\n    }\n    if ('ignorecurrentpositiononzoom' in hashParams) {\n      PDFJS.ignoreCurrentPositionOnZoom =\n        (hashParams['ignorecurrentpositiononzoom'] === 'true');\n    }\n    if (typeof PDFJSDev === 'undefined' || !PDFJSDev.test('PRODUCTION')) {\n      if ('disablebcmaps' in hashParams && hashParams['disablebcmaps']) {\n        PDFJS.cMapUrl = '../external/cmaps/';\n        PDFJS.cMapPacked = false;\n      }\n    }\n    if ('textlayer' in hashParams) {\n      switch (hashParams['textlayer']) {\n        case 'off':\n          PDFJS.disableTextLayer = true;\n          break;\n        case 'visible':\n        case 'shadow':\n        case 'hover':\n          let viewer = appConfig.viewerContainer;\n          viewer.classList.add('textLayer-' + hashParams['textlayer']);\n          break;\n      }\n    }\n    if ('pdfbug' in hashParams) {\n      PDFJS.pdfBug = true;\n      let pdfBug = hashParams['pdfbug'];\n      let enabled = pdfBug.split(',');\n      waitForBeforeOpening.push(loadAndEnablePDFBug(enabled));\n    }\n  }\n\n  if (typeof PDFJSDev !== 'undefined' &&\n      PDFJSDev.test('FIREFOX || MOZCENTRAL') &&\n      !PDFViewerApplication.supportsDocumentFonts) {\n    PDFJS.disableFontFace = true;\n    PDFViewerApplication.l10n.get('web_fonts_disabled', null,\n      'Web fonts are disabled: unable to use embedded PDF fonts.').\n        then((msg) => {\n      console.warn(msg);\n    });\n  }\n\n  if (!PDFViewerApplication.supportsPrinting) {\n    appConfig.toolbar.print.classList.add('hidden');\n    appConfig.secondaryToolbar.printButton.classList.add('hidden');\n  }\n\n  if (!PDFViewerApplication.supportsFullscreen) {\n    appConfig.toolbar.presentationModeButton.classList.add('hidden');\n    appConfig.secondaryToolbar.presentationModeButton.classList.add('hidden');\n  }\n\n  if (PDFViewerApplication.supportsIntegratedFind) {\n    appConfig.toolbar.viewFind.classList.add('hidden');\n  }\n\n  appConfig.sidebar.mainContainer.addEventListener('transitionend',\n    function(evt) {\n      if (evt.target === /* mainContainer */ this) {\n        PDFViewerApplication.eventBus.dispatch('resize');\n      }\n    }, true);\n\n  appConfig.sidebar.toggleButton.addEventListener('click', function() {\n    PDFViewerApplication.pdfSidebar.toggle();\n  });\n\n  Promise.all(waitForBeforeOpening).then(function () {\n    webViewerOpenFileViaURL(file);\n  }).catch(function (reason) {\n    PDFViewerApplication.l10n.get('loading_error', null,\n        'An error occurred while opening.').then((msg) => {\n      PDFViewerApplication.error(msg, reason);\n    });\n  });\n}\n\nlet webViewerOpenFileViaURL;\nif (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {\n  webViewerOpenFileViaURL = function webViewerOpenFileViaURL(file) {\n    if (file && file.lastIndexOf('file:', 0) === 0) {\n      // file:-scheme. Load the contents in the main thread because QtWebKit\n      // cannot load file:-URLs in a Web Worker. file:-URLs are usually loaded\n      // very quickly, so there is no need to set up progress event listeners.\n      PDFViewerApplication.setTitleUsingUrl(file);\n      let xhr = new XMLHttpRequest();\n      xhr.onload = function() {\n        PDFViewerApplication.open(new Uint8Array(xhr.response));\n      };\n      try {\n        xhr.open('GET', file);\n        xhr.responseType = 'arraybuffer';\n        xhr.send();\n      } catch (ex) {\n        PDFViewerApplication.l10n.get('loading_error', null,\n            'An error occurred while loading the PDF.').then((msg) => {\n          PDFViewerApplication.error(msg, ex);\n        });\n      }\n      return;\n    }\n\n    if (file) {\n      PDFViewerApplication.open(file);\n    }\n  };\n} else if (PDFJSDev.test('FIREFOX || MOZCENTRAL || CHROME')) {\n  webViewerOpenFileViaURL = function webViewerOpenFileViaURL(file) {\n    PDFViewerApplication.setTitleUsingUrl(file);\n    PDFViewerApplication.initPassiveLoading();\n  };\n} else {\n  webViewerOpenFileViaURL = function webViewerOpenFileURL(file) {\n    if (file) {\n      throw new Error('Not implemented: webViewerOpenFileURL');\n    }\n  };\n}\n\nfunction webViewerPageRendered(evt) {\n  let pageNumber = evt.pageNumber;\n  let pageIndex = pageNumber - 1;\n  let pageView = PDFViewerApplication.pdfViewer.getPageView(pageIndex);\n\n  // If the page is still visible when it has finished rendering,\n  // ensure that the page number input loading indicator is hidden.\n  if (pageNumber === PDFViewerApplication.page) {\n    PDFViewerApplication.toolbar.updateLoadingIndicatorState(false);\n  }\n\n  // Prevent errors in the edge-case where the PDF document is removed *before*\n  // the 'pagerendered' event handler is invoked.\n  if (!pageView) {\n    return;\n  }\n\n  // Use the rendered page to set the corresponding thumbnail image.\n  if (PDFViewerApplication.pdfSidebar.isThumbnailViewVisible) {\n    let thumbnailView = PDFViewerApplication.pdfThumbnailViewer.\n                        getThumbnail(pageIndex);\n    thumbnailView.setImage(pageView);\n  }\n\n  if (PDFJS.pdfBug && Stats.enabled && pageView.stats) {\n    Stats.add(pageNumber, pageView.stats);\n  }\n\n  if (pageView.error) {\n    PDFViewerApplication.l10n.get('rendering_error', null,\n        'An error occurred while rendering the page.').then((msg) => {\n      PDFViewerApplication.error(msg, pageView.error);\n    });\n  }\n\n  if (typeof PDFJSDev !== 'undefined' &&\n      PDFJSDev.test('FIREFOX || MOZCENTRAL')) {\n    PDFViewerApplication.externalServices.reportTelemetry({\n      type: 'pageInfo',\n    });\n    // It is a good time to report stream and font types.\n    PDFViewerApplication.pdfDocument.getStats().then(function (stats) {\n      PDFViewerApplication.externalServices.reportTelemetry({\n        type: 'documentStats',\n        stats,\n      });\n    });\n  }\n}\n\nfunction webViewerTextLayerRendered(evt) {\n  if (typeof PDFJSDev !== 'undefined' &&\n      PDFJSDev.test('FIREFOX || MOZCENTRAL') &&\n      evt.numTextDivs > 0 && !PDFViewerApplication.supportsDocumentColors) {\n    PDFViewerApplication.l10n.get('document_colors_not_allowed', null,\n      'PDF documents are not allowed to use their own colors: ' +\n      '\\'Allow pages to choose their own colors\\' ' +\n      'is deactivated in the browser.').\n        then((msg) => {\n      console.error(msg);\n    });\n    PDFViewerApplication.fallback();\n  }\n}\n\nfunction webViewerPageMode(evt) {\n  // Handle the 'pagemode' hash parameter, see also `PDFLinkService_setHash`.\n  let mode = evt.mode, view;\n  switch (mode) {\n    case 'thumbs':\n      view = SidebarView.THUMBS;\n      break;\n    case 'bookmarks':\n    case 'outline':\n      view = SidebarView.OUTLINE;\n      break;\n    case 'attachments':\n      view = SidebarView.ATTACHMENTS;\n      break;\n    case 'none':\n      view = SidebarView.NONE;\n      break;\n    default:\n      console.error('Invalid \"pagemode\" hash parameter: ' + mode);\n      return;\n  }\n  PDFViewerApplication.pdfSidebar.switchView(view, /* forceOpen = */ true);\n}\n\nfunction webViewerNamedAction(evt) {\n  // Processing couple of named actions that might be useful.\n  // See also PDFLinkService.executeNamedAction\n  let action = evt.action;\n  switch (action) {\n    case 'GoToPage':\n      PDFViewerApplication.appConfig.toolbar.pageNumber.select();\n      break;\n\n    case 'Find':\n      if (!PDFViewerApplication.supportsIntegratedFind) {\n        PDFViewerApplication.findBar.toggle();\n      }\n      break;\n  }\n}\n\nfunction webViewerPresentationModeChanged(evt) {\n  let { active, switchInProgress, } = evt;\n  PDFViewerApplication.pdfViewer.presentationModeState =\n    switchInProgress ? PresentationModeState.CHANGING :\n    active ? PresentationModeState.FULLSCREEN : PresentationModeState.NORMAL;\n}\n\nfunction webViewerSidebarViewChanged(evt) {\n  PDFViewerApplication.pdfRenderingQueue.isThumbnailViewEnabled =\n    PDFViewerApplication.pdfSidebar.isThumbnailViewVisible;\n\n  let store = PDFViewerApplication.store;\n  if (store && PDFViewerApplication.isInitialViewSet) {\n    // Only update the storage when the document has been loaded *and* rendered.\n    store.set('sidebarView', evt.view).catch(function() { });\n  }\n}\n\nfunction webViewerUpdateViewarea(evt) {\n  let location = evt.location, store = PDFViewerApplication.store;\n\n  if (store && PDFViewerApplication.isInitialViewSet) {\n    store.setMultiple({\n      'exists': true,\n      'page': location.pageNumber,\n      'zoom': location.scale,\n      'scrollLeft': location.left,\n      'scrollTop': location.top,\n    }).catch(function() { /* unable to write to storage */ });\n  }\n  let href =\n    PDFViewerApplication.pdfLinkService.getAnchorUrl(location.pdfOpenParams);\n  PDFViewerApplication.appConfig.toolbar.viewBookmark.href = href;\n  PDFViewerApplication.appConfig.secondaryToolbar.viewBookmarkButton.href =\n    href;\n\n  // Update the current bookmark in the browsing history.\n  PDFViewerApplication.pdfHistory.updateCurrentBookmark(location.pdfOpenParams,\n                                                        location.pageNumber);\n\n  // Show/hide the loading indicator in the page number input element.\n  let currentPage =\n    PDFViewerApplication.pdfViewer.getPageView(PDFViewerApplication.page - 1);\n  let loading = currentPage.renderingState !== RenderingStates.FINISHED;\n  PDFViewerApplication.toolbar.updateLoadingIndicatorState(loading);\n}\n\nfunction webViewerResize() {\n  let { pdfDocument, pdfViewer, } = PDFViewerApplication;\n  if (!pdfDocument) {\n    return;\n  }\n  let currentScaleValue = pdfViewer.currentScaleValue;\n  if (currentScaleValue === 'auto' ||\n      currentScaleValue === 'page-fit' ||\n      currentScaleValue === 'page-width') {\n    // Note: the scale is constant for 'page-actual'.\n    pdfViewer.currentScaleValue = currentScaleValue;\n  }\n  pdfViewer.update();\n}\n\nfunction webViewerHashchange(evt) {\n  if (PDFViewerApplication.pdfHistory.isHashChangeUnlocked) {\n    let hash = evt.hash;\n    if (!hash) {\n      return;\n    }\n    if (!PDFViewerApplication.isInitialViewSet) {\n      PDFViewerApplication.initialBookmark = hash;\n    } else {\n      PDFViewerApplication.pdfLinkService.setHash(hash);\n    }\n  }\n}\n\nlet webViewerFileInputChange;\nif (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {\n  webViewerFileInputChange = function webViewerFileInputChange(evt) {\n    let file = evt.fileInput.files[0];\n\n    if (!PDFJS.disableCreateObjectURL && URL.createObjectURL) {\n      PDFViewerApplication.open(URL.createObjectURL(file));\n    } else {\n      // Read the local file into a Uint8Array.\n      let fileReader = new FileReader();\n      fileReader.onload = function webViewerChangeFileReaderOnload(evt) {\n        let buffer = evt.target.result;\n        PDFViewerApplication.open(new Uint8Array(buffer));\n      };\n      fileReader.readAsArrayBuffer(file);\n    }\n\n    PDFViewerApplication.setTitleUsingUrl(file.name);\n\n    // URL does not reflect proper document location - hiding some icons.\n    let appConfig = PDFViewerApplication.appConfig;\n    appConfig.toolbar.viewBookmark.setAttribute('hidden', 'true');\n    appConfig.secondaryToolbar.viewBookmarkButton.setAttribute('hidden',\n                                                               'true');\n    appConfig.toolbar.download.setAttribute('hidden', 'true');\n    appConfig.secondaryToolbar.downloadButton.setAttribute('hidden', 'true');\n  };\n}\n\nfunction webViewerPresentationMode() {\n  PDFViewerApplication.requestPresentationMode();\n}\nfunction webViewerOpenFile() {\n  let openFileInputName = PDFViewerApplication.appConfig.openFileInputName;\n  document.getElementById(openFileInputName).click();\n}\nfunction webViewerPrint() {\n  window.print();\n}\nfunction webViewerDownload() {\n  PDFViewerApplication.download();\n}\nfunction webViewerFirstPage() {\n  if (PDFViewerApplication.pdfDocument) {\n    PDFViewerApplication.page = 1;\n  }\n}\nfunction webViewerLastPage() {\n  if (PDFViewerApplication.pdfDocument) {\n    PDFViewerApplication.page = PDFViewerApplication.pagesCount;\n  }\n}\nfunction webViewerNextPage() {\n  PDFViewerApplication.page++;\n}\nfunction webViewerPreviousPage() {\n  PDFViewerApplication.page--;\n}\nfunction webViewerZoomIn() {\n  PDFViewerApplication.zoomIn();\n}\nfunction webViewerZoomOut() {\n  PDFViewerApplication.zoomOut();\n}\nfunction webViewerPageNumberChanged(evt) {\n  let pdfViewer = PDFViewerApplication.pdfViewer;\n  pdfViewer.currentPageLabel = evt.value;\n\n  // Ensure that the page number input displays the correct value, even if the\n  // value entered by the user was invalid (e.g. a floating point number).\n  if (evt.value !== pdfViewer.currentPageNumber.toString() &&\n      evt.value !== pdfViewer.currentPageLabel) {\n    PDFViewerApplication.toolbar.setPageNumber(\n      pdfViewer.currentPageNumber, pdfViewer.currentPageLabel);\n  }\n}\nfunction webViewerScaleChanged(evt) {\n  PDFViewerApplication.pdfViewer.currentScaleValue = evt.value;\n}\nfunction webViewerRotateCw() {\n  PDFViewerApplication.rotatePages(90);\n}\nfunction webViewerRotateCcw() {\n  PDFViewerApplication.rotatePages(-90);\n}\nfunction webViewerDocumentProperties() {\n  PDFViewerApplication.pdfDocumentProperties.open();\n}\n\nfunction webViewerFind(evt) {\n  PDFViewerApplication.findController.executeCommand('find' + evt.type, {\n    query: evt.query,\n    phraseSearch: evt.phraseSearch,\n    caseSensitive: evt.caseSensitive,\n    highlightAll: evt.highlightAll,\n    findPrevious: evt.findPrevious,\n  });\n}\n\nfunction webViewerFindFromUrlHash(evt) {\n  PDFViewerApplication.findController.executeCommand('find', {\n    query: evt.query,\n    phraseSearch: evt.phraseSearch,\n    caseSensitive: false,\n    highlightAll: true,\n    findPrevious: false,\n  });\n}\n\nfunction webViewerScaleChanging(evt) {\n  PDFViewerApplication.toolbar.setPageScale(evt.presetValue, evt.scale);\n\n  PDFViewerApplication.pdfViewer.update();\n}\n\nfunction webViewerPageChanging(evt) {\n  let page = evt.pageNumber;\n\n  PDFViewerApplication.toolbar.setPageNumber(page, evt.pageLabel || null);\n  PDFViewerApplication.secondaryToolbar.setPageNumber(page);\n\n  if (PDFViewerApplication.pdfSidebar.isThumbnailViewVisible) {\n    PDFViewerApplication.pdfThumbnailViewer.scrollThumbnailIntoView(page);\n  }\n\n  // we need to update stats\n  if (PDFJS.pdfBug && Stats.enabled) {\n    let pageView = PDFViewerApplication.pdfViewer.getPageView(page - 1);\n    if (pageView.stats) {\n      Stats.add(page, pageView.stats);\n    }\n  }\n}\n\nlet zoomDisabled = false, zoomDisabledTimeout;\nfunction webViewerWheel(evt) {\n  let pdfViewer = PDFViewerApplication.pdfViewer;\n  if (pdfViewer.isInPresentationMode) {\n    return;\n  }\n\n  if (evt.ctrlKey || evt.metaKey) {\n    let support = PDFViewerApplication.supportedMouseWheelZoomModifierKeys;\n    if ((evt.ctrlKey && !support.ctrlKey) ||\n        (evt.metaKey && !support.metaKey)) {\n      return;\n    }\n    // Only zoom the pages, not the entire viewer.\n    evt.preventDefault();\n    // NOTE: this check must be placed *after* preventDefault.\n    if (zoomDisabled) {\n      return;\n    }\n\n    let previousScale = pdfViewer.currentScale;\n\n    let delta = normalizeWheelEventDelta(evt);\n\n    const MOUSE_WHEEL_DELTA_PER_PAGE_SCALE = 3.0;\n    let ticks = delta * MOUSE_WHEEL_DELTA_PER_PAGE_SCALE;\n    if (ticks < 0) {\n      PDFViewerApplication.zoomOut(-ticks);\n    } else {\n      PDFViewerApplication.zoomIn(ticks);\n    }\n\n    let currentScale = pdfViewer.currentScale;\n    if (previousScale !== currentScale) {\n      // After scaling the page via zoomIn/zoomOut, the position of the upper-\n      // left corner is restored. When the mouse wheel is used, the position\n      // under the cursor should be restored instead.\n      let scaleCorrectionFactor = currentScale / previousScale - 1;\n      let rect = pdfViewer.container.getBoundingClientRect();\n      let dx = evt.clientX - rect.left;\n      let dy = evt.clientY - rect.top;\n      pdfViewer.container.scrollLeft += dx * scaleCorrectionFactor;\n      pdfViewer.container.scrollTop += dy * scaleCorrectionFactor;\n    }\n  } else {\n    zoomDisabled = true;\n    clearTimeout(zoomDisabledTimeout);\n    zoomDisabledTimeout = setTimeout(function () {\n      zoomDisabled = false;\n    }, 1000);\n  }\n}\n\nfunction webViewerClick(evt) {\n  if (!PDFViewerApplication.secondaryToolbar.isOpen) {\n    return;\n  }\n  let appConfig = PDFViewerApplication.appConfig;\n  if (PDFViewerApplication.pdfViewer.containsElement(evt.target) ||\n      (appConfig.toolbar.container.contains(evt.target) &&\n       evt.target !== appConfig.secondaryToolbar.toggleButton)) {\n    PDFViewerApplication.secondaryToolbar.close();\n  }\n}\n\nfunction webViewerKeyDown(evt) {\n  if (PDFViewerApplication.overlayManager.active) {\n    return;\n  }\n\n  let handled = false, ensureViewerFocused = false;\n  let cmd = (evt.ctrlKey ? 1 : 0) |\n            (evt.altKey ? 2 : 0) |\n            (evt.shiftKey ? 4 : 0) |\n            (evt.metaKey ? 8 : 0);\n\n  let pdfViewer = PDFViewerApplication.pdfViewer;\n  let isViewerInPresentationMode = pdfViewer && pdfViewer.isInPresentationMode;\n\n  // First, handle the key bindings that are independent whether an input\n  // control is selected or not.\n  if (cmd === 1 || cmd === 8 || cmd === 5 || cmd === 12) {\n    // either CTRL or META key with optional SHIFT.\n    switch (evt.keyCode) {\n      case 70: // f\n        if (!PDFViewerApplication.supportsIntegratedFind) {\n          PDFViewerApplication.findBar.open();\n          handled = true;\n        }\n        break;\n      case 71: // g\n        if (!PDFViewerApplication.supportsIntegratedFind) {\n          let findState = PDFViewerApplication.findController.state;\n          if (findState) {\n            PDFViewerApplication.findController.executeCommand('findagain', {\n              query: findState.query,\n              phraseSearch: findState.phraseSearch,\n              caseSensitive: findState.caseSensitive,\n              highlightAll: findState.highlightAll,\n              findPrevious: cmd === 5 || cmd === 12,\n            });\n          }\n          handled = true;\n        }\n        break;\n      case 61: // FF/Mac '='\n      case 107: // FF '+' and '='\n      case 187: // Chrome '+'\n      case 171: // FF with German keyboard\n        if (!isViewerInPresentationMode) {\n          PDFViewerApplication.zoomIn();\n        }\n        handled = true;\n        break;\n      case 173: // FF/Mac '-'\n      case 109: // FF '-'\n      case 189: // Chrome '-'\n        if (!isViewerInPresentationMode) {\n          PDFViewerApplication.zoomOut();\n        }\n        handled = true;\n        break;\n      case 48: // '0'\n      case 96: // '0' on Numpad of Swedish keyboard\n        if (!isViewerInPresentationMode) {\n          // keeping it unhandled (to restore page zoom to 100%)\n          setTimeout(function () {\n            // ... and resetting the scale after browser adjusts its scale\n            pdfViewer.currentScaleValue = DEFAULT_SCALE_VALUE;\n          });\n          handled = false;\n        }\n        break;\n\n      case 38: // up arrow\n        if (isViewerInPresentationMode || PDFViewerApplication.page > 1) {\n          PDFViewerApplication.page = 1;\n          handled = true;\n          ensureViewerFocused = true;\n        }\n        break;\n      case 40: // down arrow\n        if (isViewerInPresentationMode ||\n            PDFViewerApplication.page < PDFViewerApplication.pagesCount) {\n          PDFViewerApplication.page = PDFViewerApplication.pagesCount;\n          handled = true;\n          ensureViewerFocused = true;\n        }\n        break;\n    }\n  }\n\n  if (typeof PDFJSDev === 'undefined' ||\n      !PDFJSDev.test('FIREFOX || MOZCENTRAL')) {\n    // CTRL or META without shift\n    if (cmd === 1 || cmd === 8) {\n      switch (evt.keyCode) {\n        case 83: // s\n          PDFViewerApplication.download();\n          handled = true;\n          break;\n      }\n    }\n  }\n\n  // CTRL+ALT or Option+Command\n  if (cmd === 3 || cmd === 10) {\n    switch (evt.keyCode) {\n      case 80: // p\n        PDFViewerApplication.requestPresentationMode();\n        handled = true;\n        break;\n      case 71: // g\n        // focuses input#pageNumber field\n        PDFViewerApplication.appConfig.toolbar.pageNumber.select();\n        handled = true;\n        break;\n    }\n  }\n\n  if (handled) {\n    if (ensureViewerFocused && !isViewerInPresentationMode) {\n      pdfViewer.focus();\n    }\n    evt.preventDefault();\n    return;\n  }\n\n  // Some shortcuts should not get handled if a control/input element\n  // is selected.\n  let curElement = document.activeElement || document.querySelector(':focus');\n  let curElementTagName = curElement && curElement.tagName.toUpperCase();\n  if (curElementTagName === 'INPUT' ||\n      curElementTagName === 'TEXTAREA' ||\n      curElementTagName === 'SELECT') {\n    // Make sure that the secondary toolbar is closed when Escape is pressed.\n    if (evt.keyCode !== 27) { // 'Esc'\n      return;\n    }\n  }\n\n  if (cmd === 0) { // no control key pressed at all.\n    switch (evt.keyCode) {\n      case 38: // up arrow\n      case 33: // pg up\n      case 8: // backspace\n        if (!isViewerInPresentationMode &&\n            pdfViewer.currentScaleValue !== 'page-fit') {\n          break;\n        }\n        /* in presentation mode */\n        /* falls through */\n      case 37: // left arrow\n        // horizontal scrolling using arrow keys\n        if (pdfViewer.isHorizontalScrollbarEnabled) {\n          break;\n        }\n        /* falls through */\n      case 75: // 'k'\n      case 80: // 'p'\n        if (PDFViewerApplication.page > 1) {\n          PDFViewerApplication.page--;\n        }\n        handled = true;\n        break;\n      case 27: // esc key\n        if (PDFViewerApplication.secondaryToolbar.isOpen) {\n          PDFViewerApplication.secondaryToolbar.close();\n          handled = true;\n        }\n        if (!PDFViewerApplication.supportsIntegratedFind &&\n            PDFViewerApplication.findBar.opened) {\n          PDFViewerApplication.findBar.close();\n          handled = true;\n        }\n        break;\n      case 40: // down arrow\n      case 34: // pg down\n      case 32: // spacebar\n        if (!isViewerInPresentationMode &&\n            pdfViewer.currentScaleValue !== 'page-fit') {\n          break;\n        }\n        /* falls through */\n      case 39: // right arrow\n        // horizontal scrolling using arrow keys\n        if (pdfViewer.isHorizontalScrollbarEnabled) {\n          break;\n        }\n        /* falls through */\n      case 74: // 'j'\n      case 78: // 'n'\n        if (PDFViewerApplication.page < PDFViewerApplication.pagesCount) {\n          PDFViewerApplication.page++;\n        }\n        handled = true;\n        break;\n\n      case 36: // home\n        if (isViewerInPresentationMode || PDFViewerApplication.page > 1) {\n          PDFViewerApplication.page = 1;\n          handled = true;\n          ensureViewerFocused = true;\n        }\n        break;\n      case 35: // end\n        if (isViewerInPresentationMode ||\n            PDFViewerApplication.page < PDFViewerApplication.pagesCount) {\n          PDFViewerApplication.page = PDFViewerApplication.pagesCount;\n          handled = true;\n          ensureViewerFocused = true;\n        }\n        break;\n\n      case 83: // 's'\n        PDFViewerApplication.pdfCursorTools.switchTool(CursorTool.SELECT);\n        break;\n      case 72: // 'h'\n        PDFViewerApplication.pdfCursorTools.switchTool(CursorTool.HAND);\n        break;\n\n      case 82: // 'r'\n        PDFViewerApplication.rotatePages(90);\n        break;\n    }\n  }\n\n  if (cmd === 4) { // shift-key\n    switch (evt.keyCode) {\n      case 32: // spacebar\n        if (!isViewerInPresentationMode &&\n            pdfViewer.currentScaleValue !== 'page-fit') {\n          break;\n        }\n        if (PDFViewerApplication.page > 1) {\n          PDFViewerApplication.page--;\n        }\n        handled = true;\n        break;\n\n      case 82: // 'r'\n        PDFViewerApplication.rotatePages(-90);\n        break;\n    }\n  }\n\n  if (!handled && !isViewerInPresentationMode) {\n    // 33=Page Up  34=Page Down  35=End    36=Home\n    // 37=Left     38=Up         39=Right  40=Down\n    // 32=Spacebar\n    if ((evt.keyCode >= 33 && evt.keyCode <= 40) ||\n        (evt.keyCode === 32 && curElementTagName !== 'BUTTON')) {\n      ensureViewerFocused = true;\n    }\n  }\n\n  if (cmd === 2) { // alt-key\n    switch (evt.keyCode) {\n      case 37: // left arrow\n        if (isViewerInPresentationMode) {\n          PDFViewerApplication.pdfHistory.back();\n          handled = true;\n        }\n        break;\n      case 39: // right arrow\n        if (isViewerInPresentationMode) {\n          PDFViewerApplication.pdfHistory.forward();\n          handled = true;\n        }\n        break;\n    }\n  }\n\n  if (ensureViewerFocused && !pdfViewer.containsElement(curElement)) {\n    // The page container is not focused, but a page navigation key has been\n    // pressed. Change the focus to the viewer container to make sure that\n    // navigation by keyboard works as expected.\n    pdfViewer.focus();\n  }\n\n  if (handled) {\n    evt.preventDefault();\n  }\n}\n\n/**\n * Converts API PageMode values to the format used by `PDFSidebar`.\n * NOTE: There's also a \"FullScreen\" parameter which is not possible to support,\n *       since the Fullscreen API used in browsers requires that entering\n *       fullscreen mode only occurs as a result of a user-initiated event.\n * @param {string} mode - The API PageMode value.\n * @returns {number} A value from {SidebarView}.\n */\nfunction apiPageModeToSidebarView(mode) {\n  switch (mode) {\n    case 'UseNone':\n      return SidebarView.NONE;\n    case 'UseThumbs':\n      return SidebarView.THUMBS;\n    case 'UseOutlines':\n      return SidebarView.OUTLINE;\n    case 'UseAttachments':\n      return SidebarView.ATTACHMENTS;\n    case 'UseOC':\n      // Not implemented, since we don't support Optional Content Groups yet.\n  }\n  return SidebarView.NONE; // Default value.\n}\n\n/* Abstract factory for the print service. */\nlet PDFPrintServiceFactory = {\n  instance: {\n    supportsPrinting: false,\n    createPrintService() {\n      throw new Error('Not implemented: createPrintService');\n    },\n  },\n};\n\nexport {\n  PDFViewerApplication,\n  DefaultExternalServices,\n  PDFPrintServiceFactory,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/app.js","/* 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 { getGlobalEventBus } from './dom_events';\nimport { parseQueryString } from './ui_utils';\n\n/**\n * @typedef {Object} PDFLinkServiceOptions\n * @property {EventBus} eventBus - The application event bus.\n */\n\n/**\n * Performs navigation functions inside PDF, such as opening specified page,\n * or destination.\n * @implements {IPDFLinkService}\n */\nclass PDFLinkService {\n  /**\n   * @param {PDFLinkServiceOptions} options\n   */\n  constructor({ eventBus, } = {}) {\n    this.eventBus = eventBus || getGlobalEventBus();\n    this.baseUrl = null;\n    this.pdfDocument = null;\n    this.pdfViewer = null;\n    this.pdfHistory = null;\n\n    this._pagesRefCache = null;\n  }\n\n  setDocument(pdfDocument, baseUrl) {\n    this.baseUrl = baseUrl;\n    this.pdfDocument = pdfDocument;\n    this._pagesRefCache = Object.create(null);\n  }\n\n  setViewer(pdfViewer) {\n    this.pdfViewer = pdfViewer;\n  }\n\n  setHistory(pdfHistory) {\n    this.pdfHistory = pdfHistory;\n  }\n\n  /**\n   * @returns {number}\n   */\n  get pagesCount() {\n    return this.pdfDocument ? this.pdfDocument.numPages : 0;\n  }\n\n  /**\n   * @returns {number}\n   */\n  get page() {\n    return this.pdfViewer.currentPageNumber;\n  }\n\n  /**\n   * @param {number} value\n   */\n  set page(value) {\n    this.pdfViewer.currentPageNumber = value;\n  }\n\n  /**\n   * @param {string|Array} dest - The named, or explicit, PDF destination.\n   */\n  navigateTo(dest) {\n    let goToDestination = ({ namedDest, explicitDest, }) => {\n      // Dest array looks like that: <page-ref> </XYZ|/FitXXX> <args..>\n      let destRef = explicitDest[0], pageNumber;\n\n      if (destRef instanceof Object) {\n        pageNumber = this._cachedPageNumber(destRef);\n\n        if (pageNumber === null) {\n          // Fetch the page reference if it's not yet available. This could\n          // only occur during loading, before all pages have been resolved.\n          this.pdfDocument.getPageIndex(destRef).then((pageIndex) => {\n            this.cachePageRef(pageIndex + 1, destRef);\n            goToDestination({ namedDest, explicitDest, });\n          }).catch(() => {\n            console.error(`PDFLinkService.navigateTo: \"${destRef}\" is not ` +\n                          `a valid page reference, for dest=\"${dest}\".`);\n          });\n          return;\n        }\n      } else if ((destRef | 0) === destRef) { // Integer\n        pageNumber = destRef + 1;\n      } else {\n        console.error(`PDFLinkService.navigateTo: \"${destRef}\" is not ` +\n                      `a valid destination reference, for dest=\"${dest}\".`);\n        return;\n      }\n      if (!pageNumber || pageNumber < 1 || pageNumber > this.pagesCount) {\n        console.error(`PDFLinkService.navigateTo: \"${pageNumber}\" is not ` +\n                      `a valid page number, for dest=\"${dest}\".`);\n        return;\n      }\n\n      this.pdfViewer.scrollPageIntoView({\n        pageNumber,\n        destArray: explicitDest,\n      });\n\n      if (this.pdfHistory) { // Update the browsing history, if enabled.\n        this.pdfHistory.push({\n          dest: explicitDest,\n          hash: namedDest,\n          page: pageNumber,\n        });\n      }\n    };\n\n    new Promise((resolve, reject) => {\n      if (typeof dest === 'string') {\n        this.pdfDocument.getDestination(dest).then((destArray) => {\n          resolve({\n            namedDest: dest,\n            explicitDest: destArray,\n          });\n        });\n        return;\n      }\n      resolve({\n        namedDest: '',\n        explicitDest: dest,\n      });\n    }).then((data) => {\n      if (!(data.explicitDest instanceof Array)) {\n        console.error(`PDFLinkService.navigateTo: \"${data.explicitDest}\" is` +\n                      ` not a valid destination array, for dest=\"${dest}\".`);\n        return;\n      }\n      goToDestination(data);\n    });\n  }\n\n  /**\n   * @param {string|Array} dest - The PDF destination object.\n   * @returns {string} The hyperlink to the PDF object.\n   */\n  getDestinationHash(dest) {\n    if (typeof dest === 'string') {\n      return this.getAnchorUrl('#' + escape(dest));\n    }\n    if (dest instanceof Array) {\n      let str = JSON.stringify(dest);\n      return this.getAnchorUrl('#' + escape(str));\n    }\n    return this.getAnchorUrl('');\n  }\n\n  /**\n   * Prefix the full url on anchor links to make sure that links are resolved\n   * relative to the current URL instead of the one defined in <base href>.\n   * @param {String} anchor The anchor hash, including the #.\n   * @returns {string} The hyperlink to the PDF object.\n   */\n  getAnchorUrl(anchor) {\n    return (this.baseUrl || '') + anchor;\n  }\n\n  /**\n   * @param {string} hash\n   */\n  setHash(hash) {\n    let pageNumber, dest;\n    if (hash.indexOf('=') >= 0) {\n      let params = parseQueryString(hash);\n      if ('search' in params) {\n        this.eventBus.dispatch('findfromurlhash', {\n          source: this,\n          query: params['search'].replace(/\"/g, ''),\n          phraseSearch: (params['phrase'] === 'true'),\n        });\n      }\n      // borrowing syntax from \"Parameters for Opening PDF Files\"\n      if ('nameddest' in params) {\n        if (this.pdfHistory) {\n          this.pdfHistory.updateNextHashParam(params.nameddest);\n        }\n        this.navigateTo(params.nameddest);\n        return;\n      }\n      if ('page' in params) {\n        pageNumber = (params.page | 0) || 1;\n      }\n      if ('zoom' in params) {\n        // Build the destination array.\n        let zoomArgs = params.zoom.split(','); // scale,left,top\n        let zoomArg = zoomArgs[0];\n        let zoomArgNumber = parseFloat(zoomArg);\n\n        if (zoomArg.indexOf('Fit') === -1) {\n          // If the zoomArg is a number, it has to get divided by 100. If it's\n          // a string, it should stay as it is.\n          dest = [null, { name: 'XYZ', },\n                  zoomArgs.length > 1 ? (zoomArgs[1] | 0) : null,\n                  zoomArgs.length > 2 ? (zoomArgs[2] | 0) : null,\n                  (zoomArgNumber ? zoomArgNumber / 100 : zoomArg)];\n        } else {\n          if (zoomArg === 'Fit' || zoomArg === 'FitB') {\n            dest = [null, { name: zoomArg, }];\n          } else if ((zoomArg === 'FitH' || zoomArg === 'FitBH') ||\n                     (zoomArg === 'FitV' || zoomArg === 'FitBV')) {\n            dest = [null, { name: zoomArg, },\n                    zoomArgs.length > 1 ? (zoomArgs[1] | 0) : null];\n          } else if (zoomArg === 'FitR') {\n            if (zoomArgs.length !== 5) {\n              console.error(\n                'PDFLinkService.setHash: Not enough parameters for \"FitR\".');\n            } else {\n              dest = [null, { name: zoomArg, },\n                      (zoomArgs[1] | 0), (zoomArgs[2] | 0),\n                      (zoomArgs[3] | 0), (zoomArgs[4] | 0)];\n            }\n          } else {\n            console.error(`PDFLinkService.setHash: \"${zoomArg}\" is not ` +\n                          'a valid zoom value.');\n          }\n        }\n      }\n      if (dest) {\n        this.pdfViewer.scrollPageIntoView({\n          pageNumber: pageNumber || this.page,\n          destArray: dest,\n          allowNegativeOffset: true,\n        });\n      } else if (pageNumber) {\n        this.page = pageNumber; // simple page\n      }\n      if ('pagemode' in params) {\n        this.eventBus.dispatch('pagemode', {\n          source: this,\n          mode: params.pagemode,\n        });\n      }\n    } else { // Named (or explicit) destination.\n      if ((typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) &&\n          /^\\d+$/.test(hash) && hash <= this.pagesCount) {\n        console.warn('PDFLinkService_setHash: specifying a page number ' +\n                     'directly after the hash symbol (#) is deprecated, ' +\n                     `please use the \"#page=${hash}\" form instead.`);\n        this.page = hash | 0;\n      }\n\n      dest = unescape(hash);\n      try {\n        dest = JSON.parse(dest);\n\n        if (!(dest instanceof Array)) {\n          // Avoid incorrectly rejecting a valid named destination, such as\n          // e.g. \"4.3\" or \"true\", because `JSON.parse` converted its type.\n          dest = dest.toString();\n        }\n      } catch (ex) {}\n\n      if (typeof dest === 'string' || isValidExplicitDestination(dest)) {\n        if (this.pdfHistory) {\n          this.pdfHistory.updateNextHashParam(dest);\n        }\n        this.navigateTo(dest);\n        return;\n      }\n      console.error(`PDFLinkService.setHash: \"${unescape(hash)}\" is not ` +\n                    'a valid destination.');\n    }\n  }\n\n  /**\n   * @param {string} action\n   */\n  executeNamedAction(action) {\n    // See PDF reference, table 8.45 - Named action\n    switch (action) {\n      case 'GoBack':\n        if (this.pdfHistory) {\n          this.pdfHistory.back();\n        }\n        break;\n\n      case 'GoForward':\n        if (this.pdfHistory) {\n          this.pdfHistory.forward();\n        }\n        break;\n\n      case 'NextPage':\n        if (this.page < this.pagesCount) {\n          this.page++;\n        }\n        break;\n\n      case 'PrevPage':\n        if (this.page > 1) {\n          this.page--;\n        }\n        break;\n\n      case 'LastPage':\n        this.page = this.pagesCount;\n        break;\n\n      case 'FirstPage':\n        this.page = 1;\n        break;\n\n      default:\n        break; // No action according to spec\n    }\n\n    this.eventBus.dispatch('namedaction', {\n      source: this,\n      action,\n    });\n  }\n\n  /**\n   * @param {Object} params\n   */\n  onFileAttachmentAnnotation({ id, filename, content, }) {\n    this.eventBus.dispatch('fileattachmentannotation', {\n      source: this,\n      id,\n      filename,\n      content,\n    });\n  }\n\n  /**\n   * @param {number} pageNum - page number.\n   * @param {Object} pageRef - reference to the page.\n   */\n  cachePageRef(pageNum, pageRef) {\n    let refStr = pageRef.num + ' ' + pageRef.gen + ' R';\n    this._pagesRefCache[refStr] = pageNum;\n  }\n\n  _cachedPageNumber(pageRef) {\n    let refStr = pageRef.num + ' ' + pageRef.gen + ' R';\n    return (this._pagesRefCache && this._pagesRefCache[refStr]) || null;\n  }\n}\n\nfunction isValidExplicitDestination(dest) {\n  if (!(dest instanceof Array)) {\n    return false;\n  }\n  let destLength = dest.length, allowNull = true;\n  if (destLength < 2) {\n    return false;\n  }\n  let page = dest[0];\n  if (!(typeof page === 'object' &&\n        typeof page.num === 'number' && (page.num | 0) === page.num &&\n        typeof page.gen === 'number' && (page.gen | 0) === page.gen) &&\n      !(typeof page === 'number' && (page | 0) === page && page >= 0)) {\n    return false;\n  }\n  let zoom = dest[1];\n  if (!(typeof zoom === 'object' && typeof zoom.name === 'string')) {\n    return false;\n  }\n  switch (zoom.name) {\n    case 'XYZ':\n      if (destLength !== 5) {\n        return false;\n      }\n      break;\n    case 'Fit':\n    case 'FitB':\n      return destLength === 2;\n    case 'FitH':\n    case 'FitBH':\n    case 'FitV':\n    case 'FitBV':\n      if (destLength !== 3) {\n        return false;\n      }\n      break;\n    case 'FitR':\n      if (destLength !== 6) {\n        return false;\n      }\n      allowNull = false;\n      break;\n    default:\n      return false;\n  }\n  for (let i = 2; i < destLength; i++) {\n    let param = dest[i];\n    if (!(typeof param === 'number' || (allowNull && param === null))) {\n      return false;\n    }\n  }\n  return true;\n}\n\nclass SimpleLinkService {\n  /**\n   * @returns {number}\n   */\n  get page() {\n    return 0;\n  }\n  /**\n   * @param {number} value\n   */\n  set page(value) {}\n  /**\n   * @param dest - The PDF destination object.\n   */\n  navigateTo(dest) {}\n  /**\n   * @param dest - The PDF destination object.\n   * @returns {string} The hyperlink to the PDF object.\n   */\n  getDestinationHash(dest) {\n    return '#';\n  }\n  /**\n   * @param hash - The PDF parameters/hash.\n   * @returns {string} The hyperlink to the PDF object.\n   */\n  getAnchorUrl(hash) {\n    return '#';\n  }\n  /**\n   * @param {string} hash\n   */\n  setHash(hash) {}\n  /**\n   * @param {string} action\n   */\n  executeNamedAction(action) {}\n  /**\n   * @param {Object} params\n   */\n  onFileAttachmentAnnotation({ id, filename, content, }) {}\n  /**\n   * @param {number} pageNum - page number.\n   * @param {Object} pageRef - reference to the page.\n   */\n  cachePageRef(pageNum, pageRef) {}\n}\n\nexport {\n  PDFLinkService,\n  SimpleLinkService,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/pdf_link_service.js","/* 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\nimport { GrabToPan } from './grab_to_pan';\n\nconst CursorTool = {\n  SELECT: 0, // The default value.\n  HAND: 1,\n  ZOOM: 2,\n};\n\n/**\n * @typedef {Object} PDFCursorToolsOptions\n * @property {HTMLDivElement} container - The document container.\n * @property {EventBus} eventBus - The application event bus.\n * @property {BasePreferences} preferences - Object for reading/writing\n *                                           persistent settings.\n */\n\nclass PDFCursorTools {\n  /**\n   * @param {PDFCursorToolsOptions} options\n   */\n  constructor({ container, eventBus, preferences, }) {\n    this.container = container;\n    this.eventBus = eventBus;\n\n    this.active = CursorTool.SELECT;\n    this.activeBeforePresentationMode = null;\n\n    this.handTool = new GrabToPan({\n      element: this.container,\n    });\n\n    this._addEventListeners();\n\n    Promise.all([\n      preferences.get('cursorToolOnLoad'),\n      preferences.get('enableHandToolOnLoad')\n    ]).then(([cursorToolPref, handToolPref]) => {\n      // If the 'cursorToolOnLoad' preference has not been set to a non-default\n      // value, attempt to convert the old 'enableHandToolOnLoad' preference.\n      // TODO: Remove this conversion after a suitable number of releases.\n      if (handToolPref === true) {\n        preferences.set('enableHandToolOnLoad', false);\n\n        if (cursorToolPref === CursorTool.SELECT) {\n          cursorToolPref = CursorTool.HAND;\n          preferences.set('cursorToolOnLoad', cursorToolPref).catch(() => { });\n        }\n      }\n      this.switchTool(cursorToolPref);\n    }).catch(() => { });\n  }\n\n  /**\n   * @returns {number} One of the values in {CursorTool}.\n   */\n  get activeTool() {\n    return this.active;\n  }\n\n  /**\n   * NOTE: This method is ignored while Presentation Mode is active.\n   * @param {number} tool - The cursor mode that should be switched to,\n   *                        must be one of the values in {CursorTool}.\n   */\n  switchTool(tool) {\n    if (this.activeBeforePresentationMode !== null) {\n      return; // Cursor tools cannot be used in Presentation Mode.\n    }\n    if (tool === this.active) {\n      return; // The requested tool is already active.\n    }\n\n    let disableActiveTool = () => {\n      switch (this.active) {\n        case CursorTool.SELECT:\n          break;\n        case CursorTool.HAND:\n          this.handTool.deactivate();\n          break;\n        case CursorTool.ZOOM:\n          /* falls through */\n      }\n    };\n\n    switch (tool) { // Enable the new cursor tool.\n      case CursorTool.SELECT:\n        disableActiveTool();\n        break;\n      case CursorTool.HAND:\n        disableActiveTool();\n        this.handTool.activate();\n        break;\n      case CursorTool.ZOOM:\n        /* falls through */\n      default:\n        console.error(`switchTool: \"${tool}\" is an unsupported value.`);\n        return;\n    }\n    // Update the active tool *after* it has been validated above,\n    // in order to prevent setting it to an invalid state.\n    this.active = tool;\n\n    this._dispatchEvent();\n  }\n\n  /**\n   * @private\n   */\n  _dispatchEvent() {\n    this.eventBus.dispatch('cursortoolchanged', {\n      source: this,\n      tool: this.active,\n    });\n  }\n\n  /**\n   * @private\n   */\n  _addEventListeners() {\n    this.eventBus.on('switchcursortool', (evt) => {\n      this.switchTool(evt.tool);\n    });\n\n    this.eventBus.on('presentationmodechanged', (evt) => {\n      if (evt.switchInProgress) {\n        return;\n      }\n      let previouslyActive;\n\n      if (evt.active) {\n        previouslyActive = this.active;\n\n        this.switchTool(CursorTool.SELECT);\n        this.activeBeforePresentationMode = previouslyActive;\n      } else {\n        previouslyActive = this.activeBeforePresentationMode;\n\n        this.activeBeforePresentationMode = null;\n        this.switchTool(previouslyActive);\n      }\n    });\n  }\n}\n\nexport {\n  CursorTool,\n  PDFCursorTools,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/pdf_cursor_tools.js","/* 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 { createPromiseCapability } from 'pdfjs-lib';\nimport { scrollIntoView } from './ui_utils';\n\nconst FindState = {\n  FOUND: 0,\n  NOT_FOUND: 1,\n  WRAPPED: 2,\n  PENDING: 3,\n};\n\nconst FIND_SCROLL_OFFSET_TOP = -50;\nconst FIND_SCROLL_OFFSET_LEFT = -400;\nconst FIND_TIMEOUT = 250; // ms\n\nconst CHARACTERS_TO_NORMALIZE = {\n  '\\u2018': '\\'', // Left single quotation mark\n  '\\u2019': '\\'', // Right single quotation mark\n  '\\u201A': '\\'', // Single low-9 quotation mark\n  '\\u201B': '\\'', // Single high-reversed-9 quotation mark\n  '\\u201C': '\"', // Left double quotation mark\n  '\\u201D': '\"', // Right double quotation mark\n  '\\u201E': '\"', // Double low-9 quotation mark\n  '\\u201F': '\"', // Double high-reversed-9 quotation mark\n  '\\u00BC': '1/4', // Vulgar fraction one quarter\n  '\\u00BD': '1/2', // Vulgar fraction one half\n  '\\u00BE': '3/4', // Vulgar fraction three quarters\n};\n\n/**\n * Provides search functionality to find a given string in a PDF document.\n */\nclass PDFFindController {\n  constructor({ pdfViewer, }) {\n    this.pdfViewer = pdfViewer;\n\n    this.onUpdateResultsCount = null;\n    this.onUpdateState = null;\n\n    this.reset();\n\n    // Compile the regular expression for text normalization once.\n    let replace = Object.keys(CHARACTERS_TO_NORMALIZE).join('');\n    this.normalizationRegex = new RegExp('[' + replace + ']', 'g');\n  }\n\n  reset() {\n    this.startedTextExtraction = false;\n    this.extractTextPromises = [];\n    this.pendingFindMatches = Object.create(null);\n    this.active = false; // If active, find results will be highlighted.\n    this.pageContents = []; // Stores the text for each page.\n    this.pageMatches = [];\n    this.pageMatchesLength = null;\n    this.matchCount = 0;\n    this.selected = { // Currently selected match.\n      pageIdx: -1,\n      matchIdx: -1,\n    };\n    this.offset = { // Where the find algorithm currently is in the document.\n      pageIdx: null,\n      matchIdx: null,\n    };\n    this.pagesToSearch = null;\n    this.resumePageIdx = null;\n    this.state = null;\n    this.dirtyMatch = false;\n    this.findTimeout = null;\n\n    this._firstPagePromise = new Promise((resolve) => {\n      this.resolveFirstPage = resolve;\n    });\n  }\n\n  normalize(text) {\n    return text.replace(this.normalizationRegex, function (ch) {\n      return CHARACTERS_TO_NORMALIZE[ch];\n    });\n  }\n\n  /**\n   * Helper for multi-term search that fills the `matchesWithLength` array\n   * and handles cases where one search term includes another search term (for\n   * example, \"tamed tame\" or \"this is\"). It looks for intersecting terms in\n   * the `matches` and keeps elements with a longer match length.\n   */\n  _prepareMatches(matchesWithLength, matches, matchesLength) {\n    function isSubTerm(matchesWithLength, currentIndex) {\n      let currentElem = matchesWithLength[currentIndex];\n      let nextElem = matchesWithLength[currentIndex + 1];\n\n      // Check for cases like \"TAMEd TAME\".\n      if (currentIndex < matchesWithLength.length - 1 &&\n          currentElem.match === nextElem.match) {\n        currentElem.skipped = true;\n        return true;\n      }\n\n      // Check for cases like \"thIS IS\".\n      for (let i = currentIndex - 1; i >= 0; i--) {\n        let prevElem = matchesWithLength[i];\n        if (prevElem.skipped) {\n          continue;\n        }\n        if (prevElem.match + prevElem.matchLength < currentElem.match) {\n          break;\n        }\n        if (prevElem.match + prevElem.matchLength >=\n            currentElem.match + currentElem.matchLength) {\n          currentElem.skipped = true;\n          return true;\n        }\n      }\n      return false;\n    }\n\n    // Sort the array of `{ match: <match>, matchLength: <matchLength> }`\n    // objects on increasing index first and on the length otherwise.\n    matchesWithLength.sort(function(a, b) {\n      return a.match === b.match ? a.matchLength - b.matchLength :\n                                   a.match - b.match;\n    });\n    for (let i = 0, len = matchesWithLength.length; i < len; i++) {\n      if (isSubTerm(matchesWithLength, i)) {\n        continue;\n      }\n      matches.push(matchesWithLength[i].match);\n      matchesLength.push(matchesWithLength[i].matchLength);\n    }\n  }\n\n  calcFindPhraseMatch(query, pageIndex, pageContent) {\n    let matches = [];\n    let queryLen = query.length;\n    let matchIdx = -queryLen;\n    while (true) {\n      matchIdx = pageContent.indexOf(query, matchIdx + queryLen);\n      if (matchIdx === -1) {\n        break;\n      }\n      matches.push(matchIdx);\n    }\n    this.pageMatches[pageIndex] = matches;\n  }\n\n  calcFindWordMatch(query, pageIndex, pageContent) {\n    let matchesWithLength = [];\n    // Divide the query into pieces and search for text in each piece.\n    let queryArray = query.match(/\\S+/g);\n    for (let i = 0, len = queryArray.length; i < len; i++) {\n      let subquery = queryArray[i];\n      let subqueryLen = subquery.length;\n      let matchIdx = -subqueryLen;\n      while (true) {\n        matchIdx = pageContent.indexOf(subquery, matchIdx + subqueryLen);\n        if (matchIdx === -1) {\n          break;\n        }\n        // Other searches do not, so we store the length.\n        matchesWithLength.push({\n          match: matchIdx,\n          matchLength: subqueryLen,\n          skipped: false,\n        });\n      }\n    }\n\n    // Prepare arrays for storing the matches.\n    if (!this.pageMatchesLength) {\n      this.pageMatchesLength = [];\n    }\n    this.pageMatchesLength[pageIndex] = [];\n    this.pageMatches[pageIndex] = [];\n\n    // Sort `matchesWithLength`, remove intersecting terms and put the result\n    // into the two arrays.\n    this._prepareMatches(matchesWithLength, this.pageMatches[pageIndex],\n      this.pageMatchesLength[pageIndex]);\n  }\n\n  calcFindMatch(pageIndex) {\n    let pageContent = this.normalize(this.pageContents[pageIndex]);\n    let query = this.normalize(this.state.query);\n    let caseSensitive = this.state.caseSensitive;\n    let phraseSearch = this.state.phraseSearch;\n    let queryLen = query.length;\n\n    if (queryLen === 0) {\n      // Do nothing: the matches should be wiped out already.\n      return;\n    }\n\n    if (!caseSensitive) {\n      pageContent = pageContent.toLowerCase();\n      query = query.toLowerCase();\n    }\n\n    if (phraseSearch) {\n      this.calcFindPhraseMatch(query, pageIndex, pageContent);\n    } else {\n      this.calcFindWordMatch(query, pageIndex, pageContent);\n    }\n\n    this.updatePage(pageIndex);\n    if (this.resumePageIdx === pageIndex) {\n      this.resumePageIdx = null;\n      this.nextPageMatch();\n    }\n\n    // Update the match count.\n    if (this.pageMatches[pageIndex].length > 0) {\n      this.matchCount += this.pageMatches[pageIndex].length;\n      this.updateUIResultsCount();\n    }\n  }\n\n  extractText() {\n    if (this.startedTextExtraction) {\n      return;\n    }\n    this.startedTextExtraction = true;\n    this.pageContents.length = 0;\n\n    let promise = Promise.resolve();\n    for (let i = 0, ii = this.pdfViewer.pagesCount; i < ii; i++) {\n      let extractTextCapability = createPromiseCapability();\n      this.extractTextPromises[i] = extractTextCapability.promise;\n\n      promise = promise.then(() => {\n        return this.pdfViewer.getPageTextContent(i).then((textContent) => {\n          let textItems = textContent.items;\n          let strBuf = [];\n\n          for (let j = 0, jj = textItems.length; j < jj; j++) {\n            strBuf.push(textItems[j].str);\n          }\n          // Store the pageContent as a string.\n          this.pageContents[i] = strBuf.join('');\n          extractTextCapability.resolve(i);\n        }, (reason) => {\n          console.error(`Unable to get page ${i + 1} text content`, reason);\n          // Page error -- assuming no text content.\n          this.pageContents[i] = '';\n          extractTextCapability.resolve(i);\n        });\n      });\n    }\n  }\n\n  executeCommand(cmd, state) {\n    if (this.state === null || cmd !== 'findagain') {\n      this.dirtyMatch = true;\n    }\n    this.state = state;\n    this.updateUIState(FindState.PENDING);\n\n    this._firstPagePromise.then(() => {\n      this.extractText();\n\n      clearTimeout(this.findTimeout);\n      if (cmd === 'find') {\n        // Trigger the find action with a small delay to avoid starting the\n        // search when the user is still typing (saving resources).\n        this.findTimeout = setTimeout(this.nextMatch.bind(this), FIND_TIMEOUT);\n      } else {\n        this.nextMatch();\n      }\n    });\n  }\n\n  updatePage(index) {\n    if (this.selected.pageIdx === index) {\n      // If the page is selected, scroll the page into view, which triggers\n      // rendering the page, which adds the textLayer. Once the textLayer is\n      // build, it will scroll onto the selected match.\n      this.pdfViewer.currentPageNumber = index + 1;\n    }\n\n    let page = this.pdfViewer.getPageView(index);\n    if (page.textLayer) {\n      page.textLayer.updateMatches();\n    }\n  }\n\n  nextMatch() {\n    let previous = this.state.findPrevious;\n    let currentPageIndex = this.pdfViewer.currentPageNumber - 1;\n    let numPages = this.pdfViewer.pagesCount;\n\n    this.active = true;\n\n    if (this.dirtyMatch) {\n      // Need to recalculate the matches, reset everything.\n      this.dirtyMatch = false;\n      this.selected.pageIdx = this.selected.matchIdx = -1;\n      this.offset.pageIdx = currentPageIndex;\n      this.offset.matchIdx = null;\n      this.hadMatch = false;\n      this.resumePageIdx = null;\n      this.pageMatches = [];\n      this.matchCount = 0;\n      this.pageMatchesLength = null;\n\n      for (let i = 0; i < numPages; i++) {\n        // Wipe out any previously highlighted matches.\n        this.updatePage(i);\n\n        // Start finding the matches as soon as the text is extracted.\n        if (!(i in this.pendingFindMatches)) {\n          this.pendingFindMatches[i] = true;\n          this.extractTextPromises[i].then((pageIdx) => {\n            delete this.pendingFindMatches[pageIdx];\n            this.calcFindMatch(pageIdx);\n          });\n        }\n      }\n    }\n\n    // If there's no query there's no point in searching.\n    if (this.state.query === '') {\n      this.updateUIState(FindState.FOUND);\n      return;\n    }\n\n    // If we're waiting on a page, we return since we can't do anything else.\n    if (this.resumePageIdx) {\n      return;\n    }\n\n    let offset = this.offset;\n    // Keep track of how many pages we should maximally iterate through.\n    this.pagesToSearch = numPages;\n    // If there's already a `matchIdx` that means we are iterating through a\n    // page's matches.\n    if (offset.matchIdx !== null) {\n      let numPageMatches = this.pageMatches[offset.pageIdx].length;\n      if ((!previous && offset.matchIdx + 1 < numPageMatches) ||\n          (previous && offset.matchIdx > 0)) {\n        // The simple case; we just have advance the matchIdx to select\n        // the next match on the page.\n        this.hadMatch = true;\n        offset.matchIdx = (previous ? offset.matchIdx - 1 :\n                                      offset.matchIdx + 1);\n        this.updateMatch(true);\n        return;\n      }\n      // We went beyond the current page's matches, so we advance to\n      // the next page.\n      this.advanceOffsetPage(previous);\n    }\n    // Start searching through the page.\n    this.nextPageMatch();\n  }\n\n  matchesReady(matches) {\n    let offset = this.offset;\n    let numMatches = matches.length;\n    let previous = this.state.findPrevious;\n\n    if (numMatches) {\n      // There were matches for the page, so initialize `matchIdx`.\n      this.hadMatch = true;\n      offset.matchIdx = (previous ? numMatches - 1 : 0);\n      this.updateMatch(true);\n      return true;\n    }\n    // No matches, so attempt to search the next page.\n    this.advanceOffsetPage(previous);\n    if (offset.wrapped) {\n      offset.matchIdx = null;\n      if (this.pagesToSearch < 0) {\n        // No point in wrapping again, there were no matches.\n        this.updateMatch(false);\n        // While matches were not found, searching for a page\n        // with matches should nevertheless halt.\n        return true;\n      }\n    }\n    // Matches were not found (and searching is not done).\n    return false;\n  }\n\n  /**\n   * Called from the text layer when match presentation is updated.\n   *\n   * @param {number} pageIndex - The index of the page.\n   * @param {number} matchIndex - The index of the match.\n   * @param {Array} elements - Text layer `div` elements.\n   * @param {number} beginIdx - Start index of the `div` array for the match.\n   */\n  updateMatchPosition(pageIndex, matchIndex, elements, beginIdx) {\n    if (this.selected.matchIdx === matchIndex &&\n        this.selected.pageIdx === pageIndex) {\n      let spot = {\n        top: FIND_SCROLL_OFFSET_TOP,\n        left: FIND_SCROLL_OFFSET_LEFT,\n      };\n      scrollIntoView(elements[beginIdx], spot,\n                     /* skipOverflowHiddenElements = */ true);\n    }\n  }\n\n  nextPageMatch() {\n    if (this.resumePageIdx !== null) {\n      console.error('There can only be one pending page.');\n    }\n\n    let matches = null;\n    do {\n      let pageIdx = this.offset.pageIdx;\n      matches = this.pageMatches[pageIdx];\n      if (!matches) {\n        // The matches don't exist yet for processing by `matchesReady`,\n        // so set a resume point for when they do exist.\n        this.resumePageIdx = pageIdx;\n        break;\n      }\n    } while (!this.matchesReady(matches));\n  }\n\n  advanceOffsetPage(previous) {\n    let offset = this.offset;\n    let numPages = this.extractTextPromises.length;\n    offset.pageIdx = (previous ? offset.pageIdx - 1 : offset.pageIdx + 1);\n    offset.matchIdx = null;\n\n    this.pagesToSearch--;\n\n    if (offset.pageIdx >= numPages || offset.pageIdx < 0) {\n      offset.pageIdx = (previous ? numPages - 1 : 0);\n      offset.wrapped = true;\n    }\n  }\n\n  updateMatch(found = false) {\n    let state = FindState.NOT_FOUND;\n    let wrapped = this.offset.wrapped;\n    this.offset.wrapped = false;\n\n    if (found) {\n      let previousPage = this.selected.pageIdx;\n      this.selected.pageIdx = this.offset.pageIdx;\n      this.selected.matchIdx = this.offset.matchIdx;\n      state = (wrapped ? FindState.WRAPPED : FindState.FOUND);\n\n      // Update the currently selected page to wipe out any selected matches.\n      if (previousPage !== -1 && previousPage !== this.selected.pageIdx) {\n        this.updatePage(previousPage);\n      }\n    }\n\n    this.updateUIState(state, this.state.findPrevious);\n    if (this.selected.pageIdx !== -1) {\n      this.updatePage(this.selected.pageIdx);\n    }\n  }\n\n  updateUIResultsCount() {\n    if (this.onUpdateResultsCount) {\n      this.onUpdateResultsCount(this.matchCount);\n    }\n  }\n\n  updateUIState(state, previous) {\n    if (this.onUpdateState) {\n      this.onUpdateState(state, previous, this.matchCount);\n    }\n  }\n}\n\nexport {\n  FindState,\n  PDFFindController,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/pdf_find_controller.js","/* 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\nimport { DefaultExternalServices, PDFViewerApplication } from './app';\nimport { BasePreferences } from './preferences';\nimport { DownloadManager } from './download_manager';\nimport { GenericL10n } from './genericl10n';\nimport { PDFJS } from 'pdfjs-lib';\n\nif (typeof PDFJSDev !== 'undefined' && !PDFJSDev.test('GENERIC')) {\n  throw new Error('Module \"pdfjs-web/genericcom\" shall not be used outside ' +\n                  'GENERIC build.');\n}\n\nvar GenericCom = {};\n\nclass GenericPreferences extends BasePreferences {\n  _writeToStorage(prefObj) {\n    return new Promise(function(resolve) {\n      localStorage.setItem('pdfjs.preferences', JSON.stringify(prefObj));\n      resolve();\n    });\n  }\n\n  _readFromStorage(prefObj) {\n    return new Promise(function(resolve) {\n      var readPrefs = JSON.parse(localStorage.getItem('pdfjs.preferences'));\n      resolve(readPrefs);\n    });\n  }\n}\n\nvar GenericExternalServices = Object.create(DefaultExternalServices);\nGenericExternalServices.createDownloadManager = function() {\n  return new DownloadManager();\n};\nGenericExternalServices.createPreferences = function() {\n  return new GenericPreferences();\n};\nGenericExternalServices.createL10n = function () {\n  return new GenericL10n(PDFJS.locale);\n};\nPDFViewerApplication.externalServices = GenericExternalServices;\n\nexport {\n  GenericCom,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/genericcom.js","/* Copyright 2016 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 { CSS_UNITS, NullL10n } from './ui_utils';\nimport { PDFPrintServiceFactory, PDFViewerApplication } from './app';\nimport { PDFJS } from 'pdfjs-lib';\n\nlet activeService = null;\nlet overlayManager = null;\n\n// Renders the page to the canvas of the given print service, and returns\n// the suggested dimensions of the output page.\nfunction renderPage(activeServiceOnEntry, pdfDocument, pageNumber, size) {\n  var scratchCanvas = activeService.scratchCanvas;\n\n  // The size of the canvas in pixels for printing.\n  var PRINT_RESOLUTION = 150;\n  var PRINT_UNITS = PRINT_RESOLUTION / 72.0;\n  scratchCanvas.width = Math.floor(size.width * PRINT_UNITS);\n  scratchCanvas.height = Math.floor(size.height * PRINT_UNITS);\n\n  // The physical size of the img as specified by the PDF document.\n  var width = Math.floor(size.width * CSS_UNITS) + 'px';\n  var height = Math.floor(size.height * CSS_UNITS) + 'px';\n\n  var ctx = scratchCanvas.getContext('2d');\n  ctx.save();\n  ctx.fillStyle = 'rgb(255, 255, 255)';\n  ctx.fillRect(0, 0, scratchCanvas.width, scratchCanvas.height);\n  ctx.restore();\n\n  return pdfDocument.getPage(pageNumber).then(function (pdfPage) {\n    var renderContext = {\n      canvasContext: ctx,\n      transform: [PRINT_UNITS, 0, 0, PRINT_UNITS, 0, 0],\n      viewport: pdfPage.getViewport(1, size.rotation),\n      intent: 'print',\n    };\n    return pdfPage.render(renderContext).promise;\n  }).then(function () {\n    return {\n      width,\n      height,\n    };\n  });\n}\n\nfunction PDFPrintService(pdfDocument, pagesOverview, printContainer, l10n) {\n  this.pdfDocument = pdfDocument;\n  this.pagesOverview = pagesOverview;\n  this.printContainer = printContainer;\n  this.l10n = l10n || NullL10n;\n  this.currentPage = -1;\n  // The temporary canvas where renderPage paints one page at a time.\n  this.scratchCanvas = document.createElement('canvas');\n}\n\nPDFPrintService.prototype = {\n  layout() {\n    this.throwIfInactive();\n\n    var body = document.querySelector('body');\n    body.setAttribute('data-pdfjsprinting', true);\n\n    var hasEqualPageSizes = this.pagesOverview.every(function (size) {\n      return size.width === this.pagesOverview[0].width &&\n             size.height === this.pagesOverview[0].height;\n    }, this);\n    if (!hasEqualPageSizes) {\n      console.warn('Not all pages have the same size. The printed ' +\n                   'result may be incorrect!');\n    }\n\n    // Insert a @page + size rule to make sure that the page size is correctly\n    // set. Note that we assume that all pages have the same size, because\n    // variable-size pages are not supported yet (e.g. in Chrome & Firefox).\n    // TODO(robwu): Use named pages when size calculation bugs get resolved\n    // (e.g. https://crbug.com/355116) AND when support for named pages is\n    // added (http://www.w3.org/TR/css3-page/#using-named-pages).\n    // In browsers where @page + size is not supported (such as Firefox,\n    // https://bugzil.la/851441), the next stylesheet will be ignored and the\n    // user has to select the correct paper size in the UI if wanted.\n    this.pageStyleSheet = document.createElement('style');\n    var pageSize = this.pagesOverview[0];\n    this.pageStyleSheet.textContent =\n      // \"size:<width> <height>\" is what we need. But also add \"A4\" because\n      // Firefox incorrectly reports support for the other value.\n      '@supports ((size:A4) and (size:1pt 1pt)) {' +\n      '@page { size: ' + pageSize.width + 'pt ' + pageSize.height + 'pt;}' +\n      '}';\n    body.appendChild(this.pageStyleSheet);\n  },\n\n  destroy() {\n    if (activeService !== this) {\n      // |activeService| cannot be replaced without calling destroy() first,\n      // so if it differs then an external consumer has a stale reference to\n      // us.\n      return;\n    }\n    this.printContainer.textContent = '';\n    if (this.pageStyleSheet && this.pageStyleSheet.parentNode) {\n      this.pageStyleSheet.parentNode.removeChild(this.pageStyleSheet);\n      this.pageStyleSheet = null;\n    }\n    this.scratchCanvas.width = this.scratchCanvas.height = 0;\n    this.scratchCanvas = null;\n    activeService = null;\n    ensureOverlay().then(function () {\n      if (overlayManager.active !== 'printServiceOverlay') {\n        return; // overlay was already closed\n      }\n      overlayManager.close('printServiceOverlay');\n    });\n  },\n\n  renderPages() {\n    var pageCount = this.pagesOverview.length;\n    var renderNextPage = (resolve, reject) => {\n      this.throwIfInactive();\n      if (++this.currentPage >= pageCount) {\n        renderProgress(pageCount, pageCount, this.l10n);\n        resolve();\n        return;\n      }\n      var index = this.currentPage;\n      renderProgress(index, pageCount, this.l10n);\n      renderPage(this, this.pdfDocument, index + 1, this.pagesOverview[index])\n        .then(this.useRenderedPage.bind(this))\n        .then(function () {\n          renderNextPage(resolve, reject);\n        }, reject);\n    };\n    return new Promise(renderNextPage);\n  },\n\n  useRenderedPage(printItem) {\n    this.throwIfInactive();\n    var img = document.createElement('img');\n    img.style.width = printItem.width;\n    img.style.height = printItem.height;\n\n    var scratchCanvas = this.scratchCanvas;\n    if (('toBlob' in scratchCanvas) && !PDFJS.disableCreateObjectURL) {\n      scratchCanvas.toBlob(function (blob) {\n        img.src = URL.createObjectURL(blob);\n      });\n    } else {\n      img.src = scratchCanvas.toDataURL();\n    }\n\n    var wrapper = document.createElement('div');\n    wrapper.appendChild(img);\n    this.printContainer.appendChild(wrapper);\n\n    return new Promise(function (resolve, reject) {\n      img.onload = resolve;\n      img.onerror = reject;\n    });\n  },\n\n  performPrint() {\n    this.throwIfInactive();\n    return new Promise((resolve) => {\n      // Push window.print in the macrotask queue to avoid being affected by\n      // the deprecation of running print() code in a microtask, see\n      // https://github.com/mozilla/pdf.js/issues/7547.\n      setTimeout(() => {\n        if (!this.active) {\n          resolve();\n          return;\n        }\n        print.call(window);\n        // Delay promise resolution in case print() was not synchronous.\n        setTimeout(resolve, 20);  // Tidy-up.\n      }, 0);\n    });\n  },\n\n  get active() {\n    return this === activeService;\n  },\n\n  throwIfInactive() {\n    if (!this.active) {\n      throw new Error('This print request was cancelled or completed.');\n    }\n  },\n};\n\n\nvar print = window.print;\nwindow.print = function print() {\n  if (activeService) {\n    console.warn('Ignored window.print() because of a pending print job.');\n    return;\n  }\n  ensureOverlay().then(function () {\n    if (activeService) {\n      overlayManager.open('printServiceOverlay');\n    }\n  });\n\n  try {\n    dispatchEvent('beforeprint');\n  } finally {\n    if (!activeService) {\n      console.error('Expected print service to be initialized.');\n      ensureOverlay().then(function () {\n        if (overlayManager.active === 'printServiceOverlay') {\n          overlayManager.close('printServiceOverlay');\n        }\n      });\n      return; // eslint-disable-line no-unsafe-finally\n    }\n    var activeServiceOnEntry = activeService;\n    activeService.renderPages().then(function () {\n      return activeServiceOnEntry.performPrint();\n    }).catch(function () {\n      // Ignore any error messages.\n    }).then(function () {\n      // aborts acts on the \"active\" print request, so we need to check\n      // whether the print request (activeServiceOnEntry) is still active.\n      // Without the check, an unrelated print request (created after aborting\n      // this print request while the pages were being generated) would be\n      // aborted.\n      if (activeServiceOnEntry.active) {\n        abort();\n      }\n    });\n  }\n};\n\nfunction dispatchEvent(eventType) {\n  var event = document.createEvent('CustomEvent');\n  event.initCustomEvent(eventType, false, false, 'custom');\n  window.dispatchEvent(event);\n}\n\nfunction abort() {\n  if (activeService) {\n    activeService.destroy();\n    dispatchEvent('afterprint');\n  }\n}\n\nfunction renderProgress(index, total, l10n) {\n  var progressContainer = document.getElementById('printServiceOverlay');\n  var progress = Math.round(100 * index / total);\n  var progressBar = progressContainer.querySelector('progress');\n  var progressPerc = progressContainer.querySelector('.relative-progress');\n  progressBar.value = progress;\n  l10n.get('print_progress_percent', { progress, }, progress + '%').\n      then((msg) => {\n    progressPerc.textContent = msg;\n  });\n}\n\nvar hasAttachEvent = !!document.attachEvent;\n\nwindow.addEventListener('keydown', function(event) {\n  // Intercept Cmd/Ctrl + P in all browsers.\n  // Also intercept Cmd/Ctrl + Shift + P in Chrome and Opera\n  if (event.keyCode === /* P= */ 80 && (event.ctrlKey || event.metaKey) &&\n      !event.altKey && (!event.shiftKey || window.chrome || window.opera)) {\n    window.print();\n    if (hasAttachEvent) {\n      // Only attachEvent can cancel Ctrl + P dialog in IE <=10\n      // attachEvent is gone in IE11, so the dialog will re-appear in IE11.\n      return;\n    }\n    event.preventDefault();\n    if (event.stopImmediatePropagation) {\n      event.stopImmediatePropagation();\n    } else {\n      event.stopPropagation();\n    }\n    return;\n  }\n}, true);\nif (hasAttachEvent) {\n  document.attachEvent('onkeydown', function(event) {\n    event = event || window.event;\n    if (event.keyCode === /* P= */ 80 && event.ctrlKey) {\n      event.keyCode = 0;\n      return false;\n    }\n  });\n}\n\nif ('onbeforeprint' in window) {\n  // Do not propagate before/afterprint events when they are not triggered\n  // from within this polyfill. (FF/IE).\n  var stopPropagationIfNeeded = function(event) {\n    if (event.detail !== 'custom' && event.stopImmediatePropagation) {\n      event.stopImmediatePropagation();\n    }\n  };\n  window.addEventListener('beforeprint', stopPropagationIfNeeded);\n  window.addEventListener('afterprint', stopPropagationIfNeeded);\n}\n\nvar overlayPromise;\nfunction ensureOverlay() {\n  if (!overlayPromise) {\n    overlayManager = PDFViewerApplication.overlayManager;\n    if (!overlayManager) {\n      throw new Error('The overlay manager has not yet been initialized.');\n    }\n\n    overlayPromise = overlayManager.register('printServiceOverlay',\n      document.getElementById('printServiceOverlay'), abort, true);\n    document.getElementById('printCancel').onclick = abort;\n  }\n  return overlayPromise;\n}\n\nPDFPrintServiceFactory.instance = {\n  supportsPrinting: true,\n\n  createPrintService(pdfDocument, pagesOverview, printContainer, l10n) {\n    if (activeService) {\n      throw new Error('The print service is created and active.');\n    }\n    activeService = new PDFPrintService(pdfDocument, pagesOverview,\n                                        printContainer, l10n);\n    return activeService;\n  },\n};\n\nexport {\n  PDFPrintService,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/pdf_print_service.js","/**\n * Copyright (c) 2011-2013 Fabien Cazenave, Mozilla.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n/*\n  Additional modifications for PDF.js project:\n    - Disables language initialization on page loading.\n    - Disables document translation on page loading.\n    - Removes consoleWarn and consoleLog and use console.log/warn directly.\n    - Removes window._ assignment.\n    - Remove compatibility code for OldIE.\n*/\n\n/*jshint browser: true, devel: true, es5: true, globalstrict: true */\n'use strict';\n\ndocument.webL10n = (function(window, document, undefined) {\n  var gL10nData = {};\n  var gTextData = '';\n  var gTextProp = 'textContent';\n  var gLanguage = '';\n  var gMacros = {};\n  var gReadyState = 'loading';\n\n\n  /**\n   * Synchronously loading l10n resources significantly minimizes flickering\n   * from displaying the app with non-localized strings and then updating the\n   * strings. Although this will block all script execution on this page, we\n   * expect that the l10n resources are available locally on flash-storage.\n   *\n   * As synchronous XHR is generally considered as a bad idea, we're still\n   * loading l10n resources asynchronously -- but we keep this in a setting,\n   * just in case... and applications using this library should hide their\n   * content until the `localized' event happens.\n   */\n\n  var gAsyncResourceLoading = true; // read-only\n\n\n  /**\n   * DOM helpers for the so-called \"HTML API\".\n   *\n   * These functions are written for modern browsers. For old versions of IE,\n   * they're overridden in the 'startup' section at the end of this file.\n   */\n\n  function getL10nResourceLinks() {\n    return document.querySelectorAll('link[type=\"application/l10n\"]');\n  }\n\n  function getL10nDictionary() {\n    var script = document.querySelector('script[type=\"application/l10n\"]');\n    // TODO: support multiple and external JSON dictionaries\n    return script ? JSON.parse(script.innerHTML) : null;\n  }\n\n  function getTranslatableChildren(element) {\n    return element ? element.querySelectorAll('*[data-l10n-id]') : [];\n  }\n\n  function getL10nAttributes(element) {\n    if (!element)\n      return {};\n\n    var l10nId = element.getAttribute('data-l10n-id');\n    var l10nArgs = element.getAttribute('data-l10n-args');\n    var args = {};\n    if (l10nArgs) {\n      try {\n        args = JSON.parse(l10nArgs);\n      } catch (e) {\n        console.warn('could not parse arguments for #' + l10nId);\n      }\n    }\n    return { id: l10nId, args: args };\n  }\n\n  function fireL10nReadyEvent(lang) {\n    var evtObject = document.createEvent('Event');\n    evtObject.initEvent('localized', true, false);\n    evtObject.language = lang;\n    document.dispatchEvent(evtObject);\n  }\n\n  function xhrLoadText(url, onSuccess, onFailure) {\n    onSuccess = onSuccess || function _onSuccess(data) {};\n    onFailure = onFailure || function _onFailure() {};\n\n    var xhr = new XMLHttpRequest();\n    xhr.open('GET', url, gAsyncResourceLoading);\n    if (xhr.overrideMimeType) {\n      xhr.overrideMimeType('text/plain; charset=utf-8');\n    }\n    xhr.onreadystatechange = function() {\n      if (xhr.readyState == 4) {\n        if (xhr.status == 200 || xhr.status === 0) {\n          onSuccess(xhr.responseText);\n        } else {\n          onFailure();\n        }\n      }\n    };\n    xhr.onerror = onFailure;\n    xhr.ontimeout = onFailure;\n\n    // in Firefox OS with the app:// protocol, trying to XHR a non-existing\n    // URL will raise an exception here -- hence this ugly try...catch.\n    try {\n      xhr.send(null);\n    } catch (e) {\n      onFailure();\n    }\n  }\n\n\n  /**\n   * l10n resource parser:\n   *  - reads (async XHR) the l10n resource matching `lang';\n   *  - imports linked resources (synchronously) when specified;\n   *  - parses the text data (fills `gL10nData' and `gTextData');\n   *  - triggers success/failure callbacks when done.\n   *\n   * @param {string} href\n   *    URL of the l10n resource to parse.\n   *\n   * @param {string} lang\n   *    locale (language) to parse. Must be a lowercase string.\n   *\n   * @param {Function} successCallback\n   *    triggered when the l10n resource has been successully parsed.\n   *\n   * @param {Function} failureCallback\n   *    triggered when the an error has occured.\n   *\n   * @return {void}\n   *    uses the following global variables: gL10nData, gTextData, gTextProp.\n   */\n\n  function parseResource(href, lang, successCallback, failureCallback) {\n    var baseURL = href.replace(/[^\\/]*$/, '') || './';\n\n    // handle escaped characters (backslashes) in a string\n    function evalString(text) {\n      if (text.lastIndexOf('\\\\') < 0)\n        return text;\n      return text.replace(/\\\\\\\\/g, '\\\\')\n                 .replace(/\\\\n/g, '\\n')\n                 .replace(/\\\\r/g, '\\r')\n                 .replace(/\\\\t/g, '\\t')\n                 .replace(/\\\\b/g, '\\b')\n                 .replace(/\\\\f/g, '\\f')\n                 .replace(/\\\\{/g, '{')\n                 .replace(/\\\\}/g, '}')\n                 .replace(/\\\\\"/g, '\"')\n                 .replace(/\\\\'/g, \"'\");\n    }\n\n    // parse *.properties text data into an l10n dictionary\n    // If gAsyncResourceLoading is false, then the callback will be called\n    // synchronously. Otherwise it is called asynchronously.\n    function parseProperties(text, parsedPropertiesCallback) {\n      var dictionary = {};\n\n      // token expressions\n      var reBlank = /^\\s*|\\s*$/;\n      var reComment = /^\\s*#|^\\s*$/;\n      var reSection = /^\\s*\\[(.*)\\]\\s*$/;\n      var reImport = /^\\s*@import\\s+url\\((.*)\\)\\s*$/i;\n      var reSplit = /^([^=\\s]*)\\s*=\\s*(.+)$/; // TODO: escape EOLs with '\\'\n\n      // parse the *.properties file into an associative array\n      function parseRawLines(rawText, extendedSyntax, parsedRawLinesCallback) {\n        var entries = rawText.replace(reBlank, '').split(/[\\r\\n]+/);\n        var currentLang = '*';\n        var genericLang = lang.split('-', 1)[0];\n        var skipLang = false;\n        var match = '';\n\n        function nextEntry() {\n          // Use infinite loop instead of recursion to avoid reaching the\n          // maximum recursion limit for content with many lines.\n          while (true) {\n            if (!entries.length) {\n              parsedRawLinesCallback();\n              return;\n            }\n            var line = entries.shift();\n\n            // comment or blank line?\n            if (reComment.test(line))\n              continue;\n\n            // the extended syntax supports [lang] sections and @import rules\n            if (extendedSyntax) {\n              match = reSection.exec(line);\n              if (match) { // section start?\n                // RFC 4646, section 4.4, \"All comparisons MUST be performed\n                // in a case-insensitive manner.\"\n\n                currentLang = match[1].toLowerCase();\n                skipLang = (currentLang !== '*') &&\n                    (currentLang !== lang) && (currentLang !== genericLang);\n                continue;\n              } else if (skipLang) {\n                continue;\n              }\n              match = reImport.exec(line);\n              if (match) { // @import rule?\n                loadImport(baseURL + match[1], nextEntry);\n                return;\n              }\n            }\n\n            // key-value pair\n            var tmp = line.match(reSplit);\n            if (tmp && tmp.length == 3) {\n              dictionary[tmp[1]] = evalString(tmp[2]);\n            }\n          }\n        }\n        nextEntry();\n      }\n\n      // import another *.properties file\n      function loadImport(url, callback) {\n        xhrLoadText(url, function(content) {\n          parseRawLines(content, false, callback); // don't allow recursive imports\n        }, function () {\n          console.warn(url + ' not found.');\n          callback();\n        });\n      }\n\n      // fill the dictionary\n      parseRawLines(text, true, function() {\n        parsedPropertiesCallback(dictionary);\n      });\n    }\n\n    // load and parse l10n data (warning: global variables are used here)\n    xhrLoadText(href, function(response) {\n      gTextData += response; // mostly for debug\n\n      // parse *.properties text data into an l10n dictionary\n      parseProperties(response, function(data) {\n\n        // find attribute descriptions, if any\n        for (var key in data) {\n          var id, prop, index = key.lastIndexOf('.');\n          if (index > 0) { // an attribute has been specified\n            id = key.substring(0, index);\n            prop = key.substr(index + 1);\n          } else { // no attribute: assuming text content by default\n            id = key;\n            prop = gTextProp;\n          }\n          if (!gL10nData[id]) {\n            gL10nData[id] = {};\n          }\n          gL10nData[id][prop] = data[key];\n        }\n\n        // trigger callback\n        if (successCallback) {\n          successCallback();\n        }\n      });\n    }, failureCallback);\n  }\n\n  // load and parse all resources for the specified locale\n  function loadLocale(lang, callback) {\n    // RFC 4646, section 2.1 states that language tags have to be treated as\n    // case-insensitive. Convert to lowercase for case-insensitive comparisons.\n    if (lang) {\n      lang = lang.toLowerCase();\n    }\n\n    callback = callback || function _callback() {};\n\n    clear();\n    gLanguage = lang;\n\n    // check all <link type=\"application/l10n\" href=\"...\" /> nodes\n    // and load the resource files\n    var langLinks = getL10nResourceLinks();\n    var langCount = langLinks.length;\n    if (langCount === 0) {\n      // we might have a pre-compiled dictionary instead\n      var dict = getL10nDictionary();\n      if (dict && dict.locales && dict.default_locale) {\n        console.log('using the embedded JSON directory, early way out');\n        gL10nData = dict.locales[lang];\n        if (!gL10nData) {\n          var defaultLocale = dict.default_locale.toLowerCase();\n          for (var anyCaseLang in dict.locales) {\n            anyCaseLang = anyCaseLang.toLowerCase();\n            if (anyCaseLang === lang) {\n              gL10nData = dict.locales[lang];\n              break;\n            } else if (anyCaseLang === defaultLocale) {\n              gL10nData = dict.locales[defaultLocale];\n            }\n          }\n        }\n        callback();\n      } else {\n        console.log('no resource to load, early way out');\n      }\n      // early way out\n      fireL10nReadyEvent(lang);\n      gReadyState = 'complete';\n      return;\n    }\n\n    // start the callback when all resources are loaded\n    var onResourceLoaded = null;\n    var gResourceCount = 0;\n    onResourceLoaded = function() {\n      gResourceCount++;\n      if (gResourceCount >= langCount) {\n        callback();\n        fireL10nReadyEvent(lang);\n        gReadyState = 'complete';\n      }\n    };\n\n    // load all resource files\n    function L10nResourceLink(link) {\n      var href = link.href;\n      // Note: If |gAsyncResourceLoading| is false, then the following callbacks\n      // are synchronously called.\n      this.load = function(lang, callback) {\n        parseResource(href, lang, callback, function() {\n          console.warn(href + ' not found.');\n          // lang not found, used default resource instead\n          console.warn('\"' + lang + '\" resource not found');\n          gLanguage = '';\n          // Resource not loaded, but we still need to call the callback.\n          callback();\n        });\n      };\n    }\n\n    for (var i = 0; i < langCount; i++) {\n      var resource = new L10nResourceLink(langLinks[i]);\n      resource.load(lang, onResourceLoaded);\n    }\n  }\n\n  // clear all l10n data\n  function clear() {\n    gL10nData = {};\n    gTextData = '';\n    gLanguage = '';\n    // TODO: clear all non predefined macros.\n    // There's no such macro /yet/ but we're planning to have some...\n  }\n\n\n  /**\n   * Get rules for plural forms (shared with JetPack), see:\n   * http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html\n   * https://github.com/mozilla/addon-sdk/blob/master/python-lib/plural-rules-generator.p\n   *\n   * @param {string} lang\n   *    locale (language) used.\n   *\n   * @return {Function}\n   *    returns a function that gives the plural form name for a given integer:\n   *       var fun = getPluralRules('en');\n   *       fun(1)    -> 'one'\n   *       fun(0)    -> 'other'\n   *       fun(1000) -> 'other'.\n   */\n\n  function getPluralRules(lang) {\n    var locales2rules = {\n      'af': 3,\n      'ak': 4,\n      'am': 4,\n      'ar': 1,\n      'asa': 3,\n      'az': 0,\n      'be': 11,\n      'bem': 3,\n      'bez': 3,\n      'bg': 3,\n      'bh': 4,\n      'bm': 0,\n      'bn': 3,\n      'bo': 0,\n      'br': 20,\n      'brx': 3,\n      'bs': 11,\n      'ca': 3,\n      'cgg': 3,\n      'chr': 3,\n      'cs': 12,\n      'cy': 17,\n      'da': 3,\n      'de': 3,\n      'dv': 3,\n      'dz': 0,\n      'ee': 3,\n      'el': 3,\n      'en': 3,\n      'eo': 3,\n      'es': 3,\n      'et': 3,\n      'eu': 3,\n      'fa': 0,\n      'ff': 5,\n      'fi': 3,\n      'fil': 4,\n      'fo': 3,\n      'fr': 5,\n      'fur': 3,\n      'fy': 3,\n      'ga': 8,\n      'gd': 24,\n      'gl': 3,\n      'gsw': 3,\n      'gu': 3,\n      'guw': 4,\n      'gv': 23,\n      'ha': 3,\n      'haw': 3,\n      'he': 2,\n      'hi': 4,\n      'hr': 11,\n      'hu': 0,\n      'id': 0,\n      'ig': 0,\n      'ii': 0,\n      'is': 3,\n      'it': 3,\n      'iu': 7,\n      'ja': 0,\n      'jmc': 3,\n      'jv': 0,\n      'ka': 0,\n      'kab': 5,\n      'kaj': 3,\n      'kcg': 3,\n      'kde': 0,\n      'kea': 0,\n      'kk': 3,\n      'kl': 3,\n      'km': 0,\n      'kn': 0,\n      'ko': 0,\n      'ksb': 3,\n      'ksh': 21,\n      'ku': 3,\n      'kw': 7,\n      'lag': 18,\n      'lb': 3,\n      'lg': 3,\n      'ln': 4,\n      'lo': 0,\n      'lt': 10,\n      'lv': 6,\n      'mas': 3,\n      'mg': 4,\n      'mk': 16,\n      'ml': 3,\n      'mn': 3,\n      'mo': 9,\n      'mr': 3,\n      'ms': 0,\n      'mt': 15,\n      'my': 0,\n      'nah': 3,\n      'naq': 7,\n      'nb': 3,\n      'nd': 3,\n      'ne': 3,\n      'nl': 3,\n      'nn': 3,\n      'no': 3,\n      'nr': 3,\n      'nso': 4,\n      'ny': 3,\n      'nyn': 3,\n      'om': 3,\n      'or': 3,\n      'pa': 3,\n      'pap': 3,\n      'pl': 13,\n      'ps': 3,\n      'pt': 3,\n      'rm': 3,\n      'ro': 9,\n      'rof': 3,\n      'ru': 11,\n      'rwk': 3,\n      'sah': 0,\n      'saq': 3,\n      'se': 7,\n      'seh': 3,\n      'ses': 0,\n      'sg': 0,\n      'sh': 11,\n      'shi': 19,\n      'sk': 12,\n      'sl': 14,\n      'sma': 7,\n      'smi': 7,\n      'smj': 7,\n      'smn': 7,\n      'sms': 7,\n      'sn': 3,\n      'so': 3,\n      'sq': 3,\n      'sr': 11,\n      'ss': 3,\n      'ssy': 3,\n      'st': 3,\n      'sv': 3,\n      'sw': 3,\n      'syr': 3,\n      'ta': 3,\n      'te': 3,\n      'teo': 3,\n      'th': 0,\n      'ti': 4,\n      'tig': 3,\n      'tk': 3,\n      'tl': 4,\n      'tn': 3,\n      'to': 0,\n      'tr': 0,\n      'ts': 3,\n      'tzm': 22,\n      'uk': 11,\n      'ur': 3,\n      've': 3,\n      'vi': 0,\n      'vun': 3,\n      'wa': 4,\n      'wae': 3,\n      'wo': 0,\n      'xh': 3,\n      'xog': 3,\n      'yo': 0,\n      'zh': 0,\n      'zu': 3\n    };\n\n    // utility functions for plural rules methods\n    function isIn(n, list) {\n      return list.indexOf(n) !== -1;\n    }\n    function isBetween(n, start, end) {\n      return start <= n && n <= end;\n    }\n\n    // list of all plural rules methods:\n    // map an integer to the plural form name to use\n    var pluralRules = {\n      '0': function(n) {\n        return 'other';\n      },\n      '1': function(n) {\n        if ((isBetween((n % 100), 3, 10)))\n          return 'few';\n        if (n === 0)\n          return 'zero';\n        if ((isBetween((n % 100), 11, 99)))\n          return 'many';\n        if (n == 2)\n          return 'two';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '2': function(n) {\n        if (n !== 0 && (n % 10) === 0)\n          return 'many';\n        if (n == 2)\n          return 'two';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '3': function(n) {\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '4': function(n) {\n        if ((isBetween(n, 0, 1)))\n          return 'one';\n        return 'other';\n      },\n      '5': function(n) {\n        if ((isBetween(n, 0, 2)) && n != 2)\n          return 'one';\n        return 'other';\n      },\n      '6': function(n) {\n        if (n === 0)\n          return 'zero';\n        if ((n % 10) == 1 && (n % 100) != 11)\n          return 'one';\n        return 'other';\n      },\n      '7': function(n) {\n        if (n == 2)\n          return 'two';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '8': function(n) {\n        if ((isBetween(n, 3, 6)))\n          return 'few';\n        if ((isBetween(n, 7, 10)))\n          return 'many';\n        if (n == 2)\n          return 'two';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '9': function(n) {\n        if (n === 0 || n != 1 && (isBetween((n % 100), 1, 19)))\n          return 'few';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '10': function(n) {\n        if ((isBetween((n % 10), 2, 9)) && !(isBetween((n % 100), 11, 19)))\n          return 'few';\n        if ((n % 10) == 1 && !(isBetween((n % 100), 11, 19)))\n          return 'one';\n        return 'other';\n      },\n      '11': function(n) {\n        if ((isBetween((n % 10), 2, 4)) && !(isBetween((n % 100), 12, 14)))\n          return 'few';\n        if ((n % 10) === 0 ||\n            (isBetween((n % 10), 5, 9)) ||\n            (isBetween((n % 100), 11, 14)))\n          return 'many';\n        if ((n % 10) == 1 && (n % 100) != 11)\n          return 'one';\n        return 'other';\n      },\n      '12': function(n) {\n        if ((isBetween(n, 2, 4)))\n          return 'few';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '13': function(n) {\n        if ((isBetween((n % 10), 2, 4)) && !(isBetween((n % 100), 12, 14)))\n          return 'few';\n        if (n != 1 && (isBetween((n % 10), 0, 1)) ||\n            (isBetween((n % 10), 5, 9)) ||\n            (isBetween((n % 100), 12, 14)))\n          return 'many';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '14': function(n) {\n        if ((isBetween((n % 100), 3, 4)))\n          return 'few';\n        if ((n % 100) == 2)\n          return 'two';\n        if ((n % 100) == 1)\n          return 'one';\n        return 'other';\n      },\n      '15': function(n) {\n        if (n === 0 || (isBetween((n % 100), 2, 10)))\n          return 'few';\n        if ((isBetween((n % 100), 11, 19)))\n          return 'many';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '16': function(n) {\n        if ((n % 10) == 1 && n != 11)\n          return 'one';\n        return 'other';\n      },\n      '17': function(n) {\n        if (n == 3)\n          return 'few';\n        if (n === 0)\n          return 'zero';\n        if (n == 6)\n          return 'many';\n        if (n == 2)\n          return 'two';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '18': function(n) {\n        if (n === 0)\n          return 'zero';\n        if ((isBetween(n, 0, 2)) && n !== 0 && n != 2)\n          return 'one';\n        return 'other';\n      },\n      '19': function(n) {\n        if ((isBetween(n, 2, 10)))\n          return 'few';\n        if ((isBetween(n, 0, 1)))\n          return 'one';\n        return 'other';\n      },\n      '20': function(n) {\n        if ((isBetween((n % 10), 3, 4) || ((n % 10) == 9)) && !(\n            isBetween((n % 100), 10, 19) ||\n            isBetween((n % 100), 70, 79) ||\n            isBetween((n % 100), 90, 99)\n            ))\n          return 'few';\n        if ((n % 1000000) === 0 && n !== 0)\n          return 'many';\n        if ((n % 10) == 2 && !isIn((n % 100), [12, 72, 92]))\n          return 'two';\n        if ((n % 10) == 1 && !isIn((n % 100), [11, 71, 91]))\n          return 'one';\n        return 'other';\n      },\n      '21': function(n) {\n        if (n === 0)\n          return 'zero';\n        if (n == 1)\n          return 'one';\n        return 'other';\n      },\n      '22': function(n) {\n        if ((isBetween(n, 0, 1)) || (isBetween(n, 11, 99)))\n          return 'one';\n        return 'other';\n      },\n      '23': function(n) {\n        if ((isBetween((n % 10), 1, 2)) || (n % 20) === 0)\n          return 'one';\n        return 'other';\n      },\n      '24': function(n) {\n        if ((isBetween(n, 3, 10) || isBetween(n, 13, 19)))\n          return 'few';\n        if (isIn(n, [2, 12]))\n          return 'two';\n        if (isIn(n, [1, 11]))\n          return 'one';\n        return 'other';\n      }\n    };\n\n    // return a function that gives the plural form name for a given integer\n    var index = locales2rules[lang.replace(/-.*$/, '')];\n    if (!(index in pluralRules)) {\n      console.warn('plural form unknown for [' + lang + ']');\n      return function() { return 'other'; };\n    }\n    return pluralRules[index];\n  }\n\n  // pre-defined 'plural' macro\n  gMacros.plural = function(str, param, key, prop) {\n    var n = parseFloat(param);\n    if (isNaN(n))\n      return str;\n\n    // TODO: support other properties (l20n still doesn't...)\n    if (prop != gTextProp)\n      return str;\n\n    // initialize _pluralRules\n    if (!gMacros._pluralRules) {\n      gMacros._pluralRules = getPluralRules(gLanguage);\n    }\n    var index = '[' + gMacros._pluralRules(n) + ']';\n\n    // try to find a [zero|one|two] key if it's defined\n    if (n === 0 && (key + '[zero]') in gL10nData) {\n      str = gL10nData[key + '[zero]'][prop];\n    } else if (n == 1 && (key + '[one]') in gL10nData) {\n      str = gL10nData[key + '[one]'][prop];\n    } else if (n == 2 && (key + '[two]') in gL10nData) {\n      str = gL10nData[key + '[two]'][prop];\n    } else if ((key + index) in gL10nData) {\n      str = gL10nData[key + index][prop];\n    } else if ((key + '[other]') in gL10nData) {\n      str = gL10nData[key + '[other]'][prop];\n    }\n\n    return str;\n  };\n\n\n  /**\n   * l10n dictionary functions\n   */\n\n  // fetch an l10n object, warn if not found, apply `args' if possible\n  function getL10nData(key, args, fallback) {\n    var data = gL10nData[key];\n    if (!data) {\n      console.warn('#' + key + ' is undefined.');\n      if (!fallback) {\n        return null;\n      }\n      data = fallback;\n    }\n\n    /** This is where l10n expressions should be processed.\n      * The plan is to support C-style expressions from the l20n project;\n      * until then, only two kinds of simple expressions are supported:\n      *   {[ index ]} and {{ arguments }}.\n      */\n    var rv = {};\n    for (var prop in data) {\n      var str = data[prop];\n      str = substIndexes(str, args, key, prop);\n      str = substArguments(str, args, key);\n      rv[prop] = str;\n    }\n    return rv;\n  }\n\n  // replace {[macros]} with their values\n  function substIndexes(str, args, key, prop) {\n    var reIndex = /\\{\\[\\s*([a-zA-Z]+)\\(([a-zA-Z]+)\\)\\s*\\]\\}/;\n    var reMatch = reIndex.exec(str);\n    if (!reMatch || !reMatch.length)\n      return str;\n\n    // an index/macro has been found\n    // Note: at the moment, only one parameter is supported\n    var macroName = reMatch[1];\n    var paramName = reMatch[2];\n    var param;\n    if (args && paramName in args) {\n      param = args[paramName];\n    } else if (paramName in gL10nData) {\n      param = gL10nData[paramName];\n    }\n\n    // there's no macro parser yet: it has to be defined in gMacros\n    if (macroName in gMacros) {\n      var macro = gMacros[macroName];\n      str = macro(str, param, key, prop);\n    }\n    return str;\n  }\n\n  // replace {{arguments}} with their values\n  function substArguments(str, args, key) {\n    var reArgs = /\\{\\{\\s*(.+?)\\s*\\}\\}/g;\n    return str.replace(reArgs, function(matched_text, arg) {\n      if (args && arg in args) {\n        return args[arg];\n      }\n      if (arg in gL10nData) {\n        return gL10nData[arg];\n      }\n      console.log('argument {{' + arg + '}} for #' + key + ' is undefined.');\n      return matched_text;\n    });\n  }\n\n  // translate an HTML element\n  function translateElement(element) {\n    var l10n = getL10nAttributes(element);\n    if (!l10n.id)\n      return;\n\n    // get the related l10n object\n    var data = getL10nData(l10n.id, l10n.args);\n    if (!data) {\n      console.warn('#' + l10n.id + ' is undefined.');\n      return;\n    }\n\n    // translate element (TODO: security checks?)\n    if (data[gTextProp]) { // XXX\n      if (getChildElementCount(element) === 0) {\n        element[gTextProp] = data[gTextProp];\n      } else {\n        // this element has element children: replace the content of the first\n        // (non-empty) child textNode and clear other child textNodes\n        var children = element.childNodes;\n        var found = false;\n        for (var i = 0, l = children.length; i < l; i++) {\n          if (children[i].nodeType === 3 && /\\S/.test(children[i].nodeValue)) {\n            if (found) {\n              children[i].nodeValue = '';\n            } else {\n              children[i].nodeValue = data[gTextProp];\n              found = true;\n            }\n          }\n        }\n        // if no (non-empty) textNode is found, insert a textNode before the\n        // first element child.\n        if (!found) {\n          var textNode = document.createTextNode(data[gTextProp]);\n          element.insertBefore(textNode, element.firstChild);\n        }\n      }\n      delete data[gTextProp];\n    }\n\n    for (var k in data) {\n      element[k] = data[k];\n    }\n  }\n\n  // webkit browsers don't currently support 'children' on SVG elements...\n  function getChildElementCount(element) {\n    if (element.children) {\n      return element.children.length;\n    }\n    if (typeof element.childElementCount !== 'undefined') {\n      return element.childElementCount;\n    }\n    var count = 0;\n    for (var i = 0; i < element.childNodes.length; i++) {\n      count += element.nodeType === 1 ? 1 : 0;\n    }\n    return count;\n  }\n\n  // translate an HTML subtree\n  function translateFragment(element) {\n    element = element || document.documentElement;\n\n    // check all translatable children (= w/ a `data-l10n-id' attribute)\n    var children = getTranslatableChildren(element);\n    var elementCount = children.length;\n    for (var i = 0; i < elementCount; i++) {\n      translateElement(children[i]);\n    }\n\n    // translate element itself if necessary\n    translateElement(element);\n  }\n\n  return {\n    // get a localized string\n    get: function(key, args, fallbackString) {\n      var index = key.lastIndexOf('.');\n      var prop = gTextProp;\n      if (index > 0) { // An attribute has been specified\n        prop = key.substr(index + 1);\n        key = key.substring(0, index);\n      }\n      var fallback;\n      if (fallbackString) {\n        fallback = {};\n        fallback[prop] = fallbackString;\n      }\n      var data = getL10nData(key, args, fallback);\n      if (data && prop in data) {\n        return data[prop];\n      }\n      return '{{' + key + '}}';\n    },\n\n    // debug\n    getData: function() { return gL10nData; },\n    getText: function() { return gTextData; },\n\n    // get|set the document language\n    getLanguage: function() { return gLanguage; },\n    setLanguage: function(lang, callback) {\n      loadLocale(lang, function() {\n        if (callback)\n          callback();\n      });\n    },\n\n    // get the direction (ltr|rtl) of the current language\n    getDirection: function() {\n      // http://www.w3.org/International/questions/qa-scripts\n      // Arabic, Hebrew, Farsi, Pashto, Urdu\n      var rtlList = ['ar', 'he', 'fa', 'ps', 'ur'];\n      var shortCode = gLanguage.split('-', 1)[0];\n      return (rtlList.indexOf(shortCode) >= 0) ? 'rtl' : 'ltr';\n    },\n\n    // translate an element or document fragment\n    translate: translateFragment,\n\n    // this can be used to prevent race conditions\n    getReadyState: function() { return gReadyState; },\n    ready: function(callback) {\n      if (!callback) {\n        return;\n      } else if (gReadyState == 'complete' || gReadyState == 'interactive') {\n        window.setTimeout(function() {\n          callback();\n        });\n      } else if (document.addEventListener) {\n        document.addEventListener('localized', function once() {\n          document.removeEventListener('localized', once);\n          callback();\n        });\n      }\n    }\n  };\n}) (window, document);\n\n\n\n// WEBPACK FOOTER //\n// external/webL10n/l10n.js","/* 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 { AnnotationLayer } from 'pdfjs-lib';\nimport { NullL10n } from './ui_utils';\nimport { SimpleLinkService } from './pdf_link_service';\n\n/**\n * @typedef {Object} AnnotationLayerBuilderOptions\n * @property {HTMLDivElement} pageDiv\n * @property {PDFPage} pdfPage\n * @property {boolean} renderInteractiveForms\n * @property {IPDFLinkService} linkService\n * @property {DownloadManager} downloadManager\n * @property {IL10n} l10n - Localization service.\n */\n\nclass AnnotationLayerBuilder {\n  /**\n   * @param {AnnotationLayerBuilderOptions} options\n   */\n  constructor({ pageDiv, pdfPage, linkService, downloadManager,\n                renderInteractiveForms = false, l10n = NullL10n, }) {\n    this.pageDiv = pageDiv;\n    this.pdfPage = pdfPage;\n    this.linkService = linkService;\n    this.downloadManager = downloadManager;\n    this.renderInteractiveForms = renderInteractiveForms;\n    this.l10n = l10n;\n\n    this.div = null;\n  }\n\n  /**\n   * @param {PageViewport} viewport\n   * @param {string} intent (default value is 'display')\n   */\n  render(viewport, intent = 'display') {\n    this.pdfPage.getAnnotations({ intent, }).then((annotations) => {\n      let parameters = {\n        viewport: viewport.clone({ dontFlip: true, }),\n        div: this.div,\n        annotations,\n        page: this.pdfPage,\n        renderInteractiveForms: this.renderInteractiveForms,\n        linkService: this.linkService,\n        downloadManager: this.downloadManager,\n      };\n\n      if (this.div) {\n        // If an annotationLayer already exists, refresh its children's\n        // transformation matrices.\n        AnnotationLayer.update(parameters);\n      } else {\n        // Create an annotation layer div and render the annotations\n        // if there is at least one annotation.\n        if (annotations.length === 0) {\n          return;\n        }\n        this.div = document.createElement('div');\n        this.div.className = 'annotationLayer';\n        this.pageDiv.appendChild(this.div);\n        parameters.div = this.div;\n\n        AnnotationLayer.render(parameters);\n        this.l10n.translate(this.div);\n      }\n    });\n  }\n\n  hide() {\n    if (!this.div) {\n      return;\n    }\n    this.div.setAttribute('hidden', 'true');\n  }\n}\n\n/**\n * @implements IPDFAnnotationLayerFactory\n */\nclass DefaultAnnotationLayerFactory {\n  /**\n   * @param {HTMLDivElement} pageDiv\n   * @param {PDFPage} pdfPage\n   * @param {boolean} renderInteractiveForms\n   * @param {IL10n} l10n\n   * @returns {AnnotationLayerBuilder}\n   */\n  createAnnotationLayerBuilder(pageDiv, pdfPage, renderInteractiveForms = false,\n                               l10n = NullL10n) {\n    return new AnnotationLayerBuilder({\n      pageDiv,\n      pdfPage,\n      renderInteractiveForms,\n      linkService: new SimpleLinkService(),\n      l10n,\n    });\n  }\n}\n\nexport {\n  AnnotationLayerBuilder,\n  DefaultAnnotationLayerFactory,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/annotation_layer_builder.js","/* Copyright 2013 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 { createObjectURL, createValidAbsoluteUrl, PDFJS } from 'pdfjs-lib';\n\nif (typeof PDFJSDev !== 'undefined' && !PDFJSDev.test('CHROME || GENERIC')) {\n  throw new Error('Module \"pdfjs-web/download_manager\" shall not be used ' +\n                  'outside CHROME and GENERIC builds.');\n}\n\nfunction download(blobUrl, filename) {\n  let a = document.createElement('a');\n  if (a.click) {\n    // Use a.click() if available. Otherwise, Chrome might show\n    // \"Unsafe JavaScript attempt to initiate a navigation change\n    //  for frame with URL\" and not open the PDF at all.\n    // Supported by (not mentioned = untested):\n    // - Firefox 6 - 19 (4- does not support a.click, 5 ignores a.click)\n    // - Chrome 19 - 26 (18- does not support a.click)\n    // - Opera 9 - 12.15\n    // - Internet Explorer 6 - 10\n    // - Safari 6 (5.1- does not support a.click)\n    a.href = blobUrl;\n    a.target = '_parent';\n    // Use a.download if available. This increases the likelihood that\n    // the file is downloaded instead of opened by another PDF plugin.\n    if ('download' in a) {\n      a.download = filename;\n    }\n    // <a> must be in the document for IE and recent Firefox versions.\n    // (otherwise .click() is ignored)\n    (document.body || document.documentElement).appendChild(a);\n    a.click();\n    a.parentNode.removeChild(a);\n  } else {\n    if (window.top === window &&\n        blobUrl.split('#')[0] === window.location.href.split('#')[0]) {\n      // If _parent == self, then opening an identical URL with different\n      // location hash will only cause a navigation, not a download.\n      let padCharacter = blobUrl.indexOf('?') === -1 ? '?' : '&';\n      blobUrl = blobUrl.replace(/#|$/, padCharacter + '$&');\n    }\n    window.open(blobUrl, '_parent');\n  }\n}\n\nclass DownloadManager {\n  downloadUrl(url, filename) {\n    if (!createValidAbsoluteUrl(url, 'http://example.com')) {\n      return; // restricted/invalid URL\n    }\n    download(url + '#pdfjs.action=download', filename);\n  }\n\n  downloadData(data, filename, contentType) {\n    if (navigator.msSaveBlob) { // IE10 and above\n      return navigator.msSaveBlob(new Blob([data], { type: contentType, }),\n                                  filename);\n    }\n    let blobUrl = createObjectURL(data, contentType,\n                                  PDFJS.disableCreateObjectURL);\n    download(blobUrl, filename);\n  }\n\n  download(blob, url, filename) {\n    if (navigator.msSaveBlob) {\n      // IE10 / IE11\n      if (!navigator.msSaveBlob(blob, filename)) {\n        this.downloadUrl(url, filename);\n      }\n      return;\n    }\n\n    if (PDFJS.disableCreateObjectURL) {\n      // URL.createObjectURL is not supported\n      this.downloadUrl(url, filename);\n      return;\n    }\n\n    let blobUrl = URL.createObjectURL(blob);\n    download(blobUrl, filename);\n  }\n}\n\nexport {\n  DownloadManager,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/download_manager.js","/* 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\nimport '../external/webL10n/l10n';\n\nvar webL10n = document.webL10n;\n\nclass GenericL10n {\n  constructor(lang) {\n    this._lang = lang;\n    this._ready = new Promise((resolve, reject) => {\n      webL10n.setLanguage(lang, () => {\n        resolve(webL10n);\n      });\n    });\n  }\n\n  getDirection() {\n    return this._ready.then((l10n) => {\n      return l10n.getDirection();\n    });\n  }\n\n  get(property, args, fallback) {\n    return this._ready.then((l10n) => {\n      return l10n.get(property, args, fallback);\n    });\n  }\n\n  translate(element) {\n    return this._ready.then((l10n) => {\n      return l10n.translate(element);\n    });\n  }\n}\n\nexport {\n  GenericL10n,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/genericl10n.js","/* Copyright 2013 Rob Wu <[email protected]>\n * https://github.com/Rob--W/grab-to-pan.js\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/**\n * Construct a GrabToPan instance for a given HTML element.\n * @param options.element {Element}\n * @param options.ignoreTarget {function} optional. See `ignoreTarget(node)`\n * @param options.onActiveChanged {function(boolean)} optional. Called\n *  when grab-to-pan is (de)activated. The first argument is a boolean that\n *  shows whether grab-to-pan is activated.\n */\nfunction GrabToPan(options) {\n  this.element = options.element;\n  this.document = options.element.ownerDocument;\n  if (typeof options.ignoreTarget === 'function') {\n    this.ignoreTarget = options.ignoreTarget;\n  }\n  this.onActiveChanged = options.onActiveChanged;\n\n  // Bind the contexts to ensure that `this` always points to\n  // the GrabToPan instance.\n  this.activate = this.activate.bind(this);\n  this.deactivate = this.deactivate.bind(this);\n  this.toggle = this.toggle.bind(this);\n  this._onmousedown = this._onmousedown.bind(this);\n  this._onmousemove = this._onmousemove.bind(this);\n  this._endPan = this._endPan.bind(this);\n\n  // This overlay will be inserted in the document when the mouse moves during\n  // a grab operation, to ensure that the cursor has the desired appearance.\n  var overlay = this.overlay = document.createElement('div');\n  overlay.className = 'grab-to-pan-grabbing';\n}\nGrabToPan.prototype = {\n  /**\n   * Class name of element which can be grabbed\n   */\n  CSS_CLASS_GRAB: 'grab-to-pan-grab',\n\n  /**\n   * Bind a mousedown event to the element to enable grab-detection.\n   */\n  activate: function GrabToPan_activate() {\n    if (!this.active) {\n      this.active = true;\n      this.element.addEventListener('mousedown', this._onmousedown, true);\n      this.element.classList.add(this.CSS_CLASS_GRAB);\n      if (this.onActiveChanged) {\n        this.onActiveChanged(true);\n      }\n    }\n  },\n\n  /**\n   * Removes all events. Any pending pan session is immediately stopped.\n   */\n  deactivate: function GrabToPan_deactivate() {\n    if (this.active) {\n      this.active = false;\n      this.element.removeEventListener('mousedown', this._onmousedown, true);\n      this._endPan();\n      this.element.classList.remove(this.CSS_CLASS_GRAB);\n      if (this.onActiveChanged) {\n        this.onActiveChanged(false);\n      }\n    }\n  },\n\n  toggle: function GrabToPan_toggle() {\n    if (this.active) {\n      this.deactivate();\n    } else {\n      this.activate();\n    }\n  },\n\n  /**\n   * Whether to not pan if the target element is clicked.\n   * Override this method to change the default behaviour.\n   *\n   * @param node {Element} The target of the event\n   * @return {boolean} Whether to not react to the click event.\n   */\n  ignoreTarget: function GrabToPan_ignoreTarget(node) {\n    // Use matchesSelector to check whether the clicked element\n    // is (a child of) an input element / link\n    return node[matchesSelector](\n      'a[href], a[href] *, input, textarea, button, button *, select, option'\n    );\n  },\n\n  /**\n   * @private\n   */\n  _onmousedown: function GrabToPan__onmousedown(event) {\n    if (event.button !== 0 || this.ignoreTarget(event.target)) {\n      return;\n    }\n    if (event.originalTarget) {\n      try {\n        // eslint-disable-next-line no-unused-expressions\n        event.originalTarget.tagName;\n      } catch (e) {\n        // Mozilla-specific: element is a scrollbar (XUL element)\n        return;\n      }\n    }\n\n    this.scrollLeftStart = this.element.scrollLeft;\n    this.scrollTopStart = this.element.scrollTop;\n    this.clientXStart = event.clientX;\n    this.clientYStart = event.clientY;\n    this.document.addEventListener('mousemove', this._onmousemove, true);\n    this.document.addEventListener('mouseup', this._endPan, true);\n    // When a scroll event occurs before a mousemove, assume that the user\n    // dragged a scrollbar (necessary for Opera Presto, Safari and IE)\n    // (not needed for Chrome/Firefox)\n    this.element.addEventListener('scroll', this._endPan, true);\n    event.preventDefault();\n    event.stopPropagation();\n\n    var focusedElement = document.activeElement;\n    if (focusedElement && !focusedElement.contains(event.target)) {\n      focusedElement.blur();\n    }\n  },\n\n  /**\n   * @private\n   */\n  _onmousemove: function GrabToPan__onmousemove(event) {\n    this.element.removeEventListener('scroll', this._endPan, true);\n    if (isLeftMouseReleased(event)) {\n      this._endPan();\n      return;\n    }\n    var xDiff = event.clientX - this.clientXStart;\n    var yDiff = event.clientY - this.clientYStart;\n    var scrollTop = this.scrollTopStart - yDiff;\n    var scrollLeft = this.scrollLeftStart - xDiff;\n    if (this.element.scrollTo) {\n      this.element.scrollTo({\n        top: scrollTop,\n        left: scrollLeft,\n        behavior: 'instant',\n      });\n    } else {\n      this.element.scrollTop = scrollTop;\n      this.element.scrollLeft = scrollLeft;\n    }\n    if (!this.overlay.parentNode) {\n      document.body.appendChild(this.overlay);\n    }\n  },\n\n  /**\n   * @private\n   */\n  _endPan: function GrabToPan__endPan() {\n    this.element.removeEventListener('scroll', this._endPan, true);\n    this.document.removeEventListener('mousemove', this._onmousemove, true);\n    this.document.removeEventListener('mouseup', this._endPan, true);\n    // Note: ChildNode.remove doesn't throw if the parentNode is undefined.\n    this.overlay.remove();\n  },\n};\n\n// Get the correct (vendor-prefixed) name of the matches method.\nvar matchesSelector;\n['webkitM', 'mozM', 'msM', 'oM', 'm'].some(function(prefix) {\n  var name = prefix + 'atches';\n  if (name in document.documentElement) {\n    matchesSelector = name;\n  }\n  name += 'Selector';\n  if (name in document.documentElement) {\n    matchesSelector = name;\n  }\n  return matchesSelector; // If found, then truthy, and [].some() ends.\n});\n\n// Browser sniffing because it's impossible to feature-detect\n// whether event.which for onmousemove is reliable\nvar isNotIEorIsIE10plus = !document.documentMode || document.documentMode > 9;\nvar chrome = window.chrome;\nvar isChrome15OrOpera15plus = chrome && (chrome.webstore || chrome.app);\n//                                       ^ Chrome 15+       ^ Opera 15+\nvar isSafari6plus = /Apple/.test(navigator.vendor) &&\n                    /Version\\/([6-9]\\d*|[1-5]\\d+)/.test(navigator.userAgent);\n\n/**\n * Whether the left mouse is not pressed.\n * @param event {MouseEvent}\n * @return {boolean} True if the left mouse button is not pressed.\n *                   False if unsure or if the left mouse button is pressed.\n */\nfunction isLeftMouseReleased(event) {\n  if ('buttons' in event && isNotIEorIsIE10plus) {\n    // http://www.w3.org/TR/DOM-Level-3-Events/#events-MouseEvent-buttons\n    // Firefox 15+\n    // Internet Explorer 10+\n    return !(event.buttons & 1);\n  }\n  if (isChrome15OrOpera15plus || isSafari6plus) {\n    // Chrome 14+\n    // Opera 15+\n    // Safari 6.0+\n    return event.which === 0;\n  }\n}\n\nexport {\n  GrabToPan,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/grab_to_pan.js","/* 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\nclass OverlayManager {\n  constructor() {\n    this._overlays = {};\n    this._active = null;\n    this._keyDownBound = this._keyDown.bind(this);\n  }\n\n  get active() {\n    return this._active;\n  }\n\n  /**\n   * @param {string} name - The name of the overlay that is registered.\n   * @param {HTMLDivElement} element - The overlay's DOM element.\n   * @param {function} callerCloseMethod - (optional) The method that, if\n   *                   present, calls `OverlayManager.close` from the object\n   *                   registering the overlay. Access to this method is\n   *                   necessary in order to run cleanup code when e.g.\n   *                   the overlay is force closed. The default is `null`.\n   * @param {boolean} canForceClose - (optional) Indicates if opening the\n   *                  overlay closes an active overlay. The default is `false`.\n   * @returns {Promise} A promise that is resolved when the overlay has been\n   *                    registered.\n   */\n  register(name, element, callerCloseMethod = null, canForceClose = false) {\n    return new Promise((resolve) => {\n      let container;\n      if (!name || !element || !(container = element.parentNode)) {\n        throw new Error('Not enough parameters.');\n      } else if (this._overlays[name]) {\n        throw new Error('The overlay is already registered.');\n      }\n      this._overlays[name] = {\n        element,\n        container,\n        callerCloseMethod,\n        canForceClose,\n      };\n      resolve();\n    });\n  }\n\n  /**\n   * @param {string} name - The name of the overlay that is unregistered.\n   * @returns {Promise} A promise that is resolved when the overlay has been\n   *                    unregistered.\n   */\n  unregister(name) {\n    return new Promise((resolve) => {\n      if (!this._overlays[name]) {\n        throw new Error('The overlay does not exist.');\n      } else if (this._active === name) {\n        throw new Error('The overlay cannot be removed while it is active.');\n      }\n      delete this._overlays[name];\n      resolve();\n    });\n  }\n\n  /**\n   * @param {string} name - The name of the overlay that should be opened.\n   * @returns {Promise} A promise that is resolved when the overlay has been\n   *                    opened.\n   */\n  open(name) {\n    return new Promise((resolve) => {\n      if (!this._overlays[name]) {\n        throw new Error('The overlay does not exist.');\n      } else if (this._active) {\n        if (this._overlays[name].canForceClose) {\n          this._closeThroughCaller();\n        } else if (this._active === name) {\n          throw new Error('The overlay is already active.');\n        } else {\n          throw new Error('Another overlay is currently active.');\n        }\n      }\n      this._active = name;\n      this._overlays[this._active].element.classList.remove('hidden');\n      this._overlays[this._active].container.classList.remove('hidden');\n\n      window.addEventListener('keydown', this._keyDownBound);\n      resolve();\n    });\n  }\n\n  /**\n   * @param {string} name - The name of the overlay that should be closed.\n   * @returns {Promise} A promise that is resolved when the overlay has been\n   *                    closed.\n   */\n  close(name) {\n    return new Promise((resolve) => {\n      if (!this._overlays[name]) {\n        throw new Error('The overlay does not exist.');\n      } else if (!this._active) {\n        throw new Error('The overlay is currently not active.');\n      } else if (this._active !== name) {\n        throw new Error('Another overlay is currently active.');\n      }\n      this._overlays[this._active].container.classList.add('hidden');\n      this._overlays[this._active].element.classList.add('hidden');\n      this._active = null;\n\n      window.removeEventListener('keydown', this._keyDownBound);\n      resolve();\n    });\n  }\n\n  /**\n   * @private\n   */\n  _keyDown(evt) {\n    if (this._active && evt.keyCode === 27) { // Esc key.\n      this._closeThroughCaller();\n      evt.preventDefault();\n    }\n  }\n\n  /**\n   * @private\n   */\n  _closeThroughCaller() {\n    if (this._overlays[this._active].callerCloseMethod) {\n      this._overlays[this._active].callerCloseMethod();\n    }\n    if (this._active) {\n      this.close(this._active);\n    }\n  }\n}\n\nexport {\n  OverlayManager,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/overlay_manager.js","/* 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 { NullL10n } from './ui_utils';\nimport { PasswordResponses } from 'pdfjs-lib';\n\n/**\n * @typedef {Object} PasswordPromptOptions\n * @property {string} overlayName - Name of the overlay for the overlay manager.\n * @property {HTMLDivElement} container - Div container for the overlay.\n * @property {HTMLParagraphElement} label - Label containing instructions for\n *                                          entering the password.\n * @property {HTMLInputElement} input - Input field for entering the password.\n * @property {HTMLButtonElement} submitButton - Button for submitting the\n *                                              password.\n * @property {HTMLButtonElement} cancelButton - Button for cancelling password\n *                                              entry.\n */\n\nclass PasswordPrompt {\n  /**\n   * @param {PasswordPromptOptions} options\n   * @param {OverlayManager} overlayManager - Manager for the viewer overlays.\n   * @param {IL10n} l10n - Localization service.\n   */\n  constructor(options, overlayManager, l10n = NullL10n) {\n    this.overlayName = options.overlayName;\n    this.container = options.container;\n    this.label = options.label;\n    this.input = options.input;\n    this.submitButton = options.submitButton;\n    this.cancelButton = options.cancelButton;\n    this.overlayManager = overlayManager;\n    this.l10n = l10n;\n\n    this.updateCallback = null;\n    this.reason = null;\n\n    // Attach the event listeners.\n    this.submitButton.addEventListener('click', this.verify.bind(this));\n    this.cancelButton.addEventListener('click', this.close.bind(this));\n    this.input.addEventListener('keydown', (e) => {\n      if (e.keyCode === 13) { // Enter key\n        this.verify();\n      }\n    });\n\n    this.overlayManager.register(this.overlayName, this.container,\n                                 this.close.bind(this), true);\n  }\n\n  open() {\n    this.overlayManager.open(this.overlayName).then(() => {\n      this.input.focus();\n\n      let promptString;\n      if (this.reason === PasswordResponses.INCORRECT_PASSWORD) {\n        promptString = this.l10n.get('password_invalid', null,\n          'Invalid password. Please try again.');\n      } else {\n        promptString = this.l10n.get('password_label', null,\n          'Enter the password to open this PDF file.');\n      }\n\n      promptString.then((msg) => {\n        this.label.textContent = msg;\n      });\n    });\n  }\n\n  close() {\n    this.overlayManager.close(this.overlayName).then(() => {\n      this.input.value = '';\n    });\n  }\n\n  verify() {\n    let password = this.input.value;\n    if (password && password.length > 0) {\n      this.close();\n      return this.updateCallback(password);\n    }\n  }\n\n  setUpdateCallback(updateCallback, reason) {\n    this.updateCallback = updateCallback;\n    this.reason = reason;\n  }\n}\n\nexport {\n  PasswordPrompt,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/password_prompt.js","/* 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  createObjectURL, createPromiseCapability, getFilenameFromUrl, PDFJS,\n  removeNullCharacters\n} from 'pdfjs-lib';\n\n/**\n * @typedef {Object} PDFAttachmentViewerOptions\n * @property {HTMLDivElement} container - The viewer element.\n * @property {EventBus} eventBus - The application event bus.\n * @property {DownloadManager} downloadManager - The download manager.\n */\n\n/**\n * @typedef {Object} PDFAttachmentViewerRenderParameters\n * @property {Object|null} attachments - A lookup table of attachment objects.\n */\n\nclass PDFAttachmentViewer {\n  /**\n   * @param {PDFAttachmentViewerOptions} options\n   */\n  constructor({ container, eventBus, downloadManager, }) {\n    this.attachments = null;\n\n    this.container = container;\n    this.eventBus = eventBus;\n    this.downloadManager = downloadManager;\n\n    this._renderedCapability = createPromiseCapability();\n    this.eventBus.on('fileattachmentannotation',\n      this._appendAttachment.bind(this));\n  }\n\n  reset(keepRenderedCapability = false) {\n    this.attachments = null;\n\n    // Remove the attachments from the DOM.\n    this.container.textContent = '';\n\n    if (!keepRenderedCapability) {\n      // NOTE: The *only* situation in which the `_renderedCapability` should\n      //       not be replaced is when appending file attachment annotations.\n      this._renderedCapability = createPromiseCapability();\n    }\n  }\n\n  /**\n   * @private\n   */\n  _dispatchEvent(attachmentsCount) {\n    this.eventBus.dispatch('attachmentsloaded', {\n      source: this,\n      attachmentsCount,\n    });\n\n    this._renderedCapability.resolve();\n  }\n\n  /**\n   * @private\n   */\n  _bindPdfLink(button, content, filename) {\n    if (PDFJS.disableCreateObjectURL) {\n      throw new Error('bindPdfLink: ' +\n                      'Unsupported \"PDFJS.disableCreateObjectURL\" value.');\n    }\n    let blobUrl;\n    button.onclick = function() {\n      if (!blobUrl) {\n        blobUrl = createObjectURL(content, 'application/pdf');\n      }\n      let viewerUrl;\n      if (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {\n        // The current URL is the viewer, let's use it and append the file.\n        viewerUrl = '?file=' + encodeURIComponent(blobUrl + '#' + filename);\n      } else if (PDFJSDev.test('CHROME')) {\n        // In the Chrome extension, the URL is rewritten using the history API\n        // in viewer.js, so an absolute URL must be generated.\n        // eslint-disable-next-line no-undef\n        viewerUrl = chrome.runtime.getURL('/content/web/viewer.html') +\n          '?file=' + encodeURIComponent(blobUrl + '#' + filename);\n      } else if (PDFJSDev.test('FIREFOX || MOZCENTRAL')) {\n        // Let Firefox's content handler catch the URL and display the PDF.\n        viewerUrl = blobUrl + '?' + encodeURIComponent(filename);\n      }\n      window.open(viewerUrl);\n      return false;\n    };\n  }\n\n  /**\n   * @private\n   */\n  _bindLink(button, content, filename) {\n    button.onclick = () => {\n      this.downloadManager.downloadData(content, filename, '');\n      return false;\n    };\n  }\n\n  /**\n   * @param {PDFAttachmentViewerRenderParameters} params\n   */\n  render({ attachments, keepRenderedCapability = false, }) {\n    let attachmentsCount = 0;\n\n    if (this.attachments) {\n      this.reset(keepRenderedCapability === true);\n    }\n    this.attachments = attachments || null;\n\n    if (!attachments) {\n      this._dispatchEvent(attachmentsCount);\n      return;\n    }\n\n    let names = Object.keys(attachments).sort(function(a, b) {\n      return a.toLowerCase().localeCompare(b.toLowerCase());\n    });\n    attachmentsCount = names.length;\n\n    for (let i = 0; i < attachmentsCount; i++) {\n      let item = attachments[names[i]];\n      let filename = removeNullCharacters(getFilenameFromUrl(item.filename));\n\n      let div = document.createElement('div');\n      div.className = 'attachmentsItem';\n      let button = document.createElement('button');\n      button.textContent = filename;\n      if (/\\.pdf$/i.test(filename) && !PDFJS.disableCreateObjectURL) {\n        this._bindPdfLink(button, item.content, filename);\n      } else {\n        this._bindLink(button, item.content, filename);\n      }\n\n      div.appendChild(button);\n      this.container.appendChild(div);\n    }\n\n    this._dispatchEvent(attachmentsCount);\n  }\n\n  /**\n   * Used to append FileAttachment annotations to the sidebar.\n   * @private\n   */\n  _appendAttachment({ id, filename, content, }) {\n    this._renderedCapability.promise.then(() => {\n      let attachments = this.attachments;\n\n      if (!attachments) {\n        attachments = Object.create(null);\n      } else {\n        for (let name in attachments) {\n          if (id === name) {\n            return; // Ignore the new attachment if it already exists.\n          }\n        }\n      }\n      attachments[id] = {\n        filename,\n        content,\n      };\n      this.render({\n        attachments,\n        keepRenderedCapability: true,\n      });\n    });\n  }\n}\n\nexport {\n  PDFAttachmentViewer,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/pdf_attachment_viewer.js","/* 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 { cloneObj, getPDFFileNameFromURL, NullL10n } from './ui_utils';\nimport { createPromiseCapability } from 'pdfjs-lib';\n\nconst DEFAULT_FIELD_CONTENT = '-';\n\n/**\n * @typedef {Object} PDFDocumentPropertiesOptions\n * @property {string} overlayName - Name/identifier for the overlay.\n * @property {Object} fields - Names and elements of the overlay's fields.\n * @property {HTMLDivElement} container - Div container for the overlay.\n * @property {HTMLButtonElement} closeButton - Button for closing the overlay.\n */\n\nclass PDFDocumentProperties {\n  /**\n   * @param {PDFDocumentPropertiesOptions} options\n   * @param {OverlayManager} overlayManager - Manager for the viewer overlays.\n   * @param {IL10n} l10n - Localization service.\n   */\n  constructor({ overlayName, fields, container, closeButton, },\n              overlayManager, l10n = NullL10n) {\n    this.overlayName = overlayName;\n    this.fields = fields;\n    this.container = container;\n    this.overlayManager = overlayManager;\n    this.l10n = l10n;\n\n    this._reset();\n\n    if (closeButton) { // Bind the event listener for the Close button.\n      closeButton.addEventListener('click', this.close.bind(this));\n    }\n    this.overlayManager.register(this.overlayName, this.container,\n                                 this.close.bind(this));\n  }\n\n  /**\n   * Open the document properties overlay.\n   */\n  open() {\n    let freezeFieldData = (data) => {\n      Object.defineProperty(this, 'fieldData', {\n        value: Object.freeze(data),\n        writable: false,\n        enumerable: true,\n        configurable: true,\n      });\n    };\n\n    Promise.all([this.overlayManager.open(this.overlayName),\n                 this._dataAvailableCapability.promise]).then(() => {\n      // If the document properties were previously fetched (for this PDF file),\n      // just update the dialog immediately to avoid redundant lookups.\n      if (this.fieldData) {\n        this._updateUI();\n        return;\n      }\n      // Get the document properties.\n      this.pdfDocument.getMetadata().then(({ info, metadata, }) => {\n        return Promise.all([\n          info,\n          metadata,\n          this._parseFileSize(this.maybeFileSize),\n          this._parseDate(info.CreationDate),\n          this._parseDate(info.ModDate)\n        ]);\n      }).then(([info, metadata, fileSize, creationDate, modificationDate]) => {\n        freezeFieldData({\n          'fileName': getPDFFileNameFromURL(this.url),\n          'fileSize': fileSize,\n          'title': info.Title,\n          'author': info.Author,\n          'subject': info.Subject,\n          'keywords': info.Keywords,\n          'creationDate': creationDate,\n          'modificationDate': modificationDate,\n          'creator': info.Creator,\n          'producer': info.Producer,\n          'version': info.PDFFormatVersion,\n          'pageCount': this.pdfDocument.numPages,\n        });\n        this._updateUI();\n\n        // Get the correct fileSize, since it may not have been set (if\n        // `this.setFileSize` wasn't called) or may be incorrectly set.\n        return this.pdfDocument.getDownloadInfo();\n      }).then(({ length, }) => {\n        return this._parseFileSize(length);\n      }).then((fileSize) => {\n        let data = cloneObj(this.fieldData);\n        data['fileSize'] = fileSize;\n\n        freezeFieldData(data);\n        this._updateUI();\n      });\n    });\n  }\n\n  /**\n   * Close the document properties overlay.\n   */\n  close() {\n    this.overlayManager.close(this.overlayName);\n  }\n\n  /**\n   * Set a reference to the PDF document and the URL in order\n   * to populate the overlay fields with the document properties.\n   * Note that the overlay will contain no information if this method\n   * is not called.\n   *\n   * @param {Object} pdfDocument - A reference to the PDF document.\n   * @param {string} url - The URL of the document.\n   */\n  setDocument(pdfDocument, url) {\n    if (this.pdfDocument) {\n      this._reset();\n      this._updateUI(true);\n    }\n    if (!pdfDocument) {\n      return;\n    }\n    this.pdfDocument = pdfDocument;\n    this.url = url;\n\n    this._dataAvailableCapability.resolve();\n  }\n\n  /**\n   * Set the file size of the PDF document. This method is used to\n   * update the file size in the document properties overlay once it\n   * is known so we do not have to wait until the entire file is loaded.\n   *\n   * @param {number} fileSize - The file size of the PDF document.\n   */\n  setFileSize(fileSize) {\n    if (typeof fileSize === 'number' && fileSize > 0) {\n      this.maybeFileSize = fileSize;\n    }\n  }\n\n  /**\n   * @private\n   */\n  _reset() {\n    this.pdfDocument = null;\n    this.url = null;\n\n    this.maybeFileSize = 0;\n    delete this.fieldData;\n    this._dataAvailableCapability = createPromiseCapability();\n  }\n\n  /**\n   * Always updates all of the dialog fields, to prevent inconsistent UI state.\n   * NOTE: If the contents of a particular field is neither a non-empty string,\n   *       nor a number, it will fall back to `DEFAULT_FIELD_CONTENT`.\n   * @private\n   */\n  _updateUI(reset = false) {\n    if (reset || !this.fieldData) {\n      for (let id in this.fields) {\n        this.fields[id].textContent = DEFAULT_FIELD_CONTENT;\n      }\n      return;\n    }\n    if (this.overlayManager.active !== this.overlayName) {\n      // Don't bother updating the dialog if has already been closed,\n      // since it will be updated the next time `this.open` is called.\n      return;\n    }\n    for (let id in this.fields) {\n      let content = this.fieldData[id];\n      this.fields[id].textContent = (content || content === 0) ?\n                                    content : DEFAULT_FIELD_CONTENT;\n    }\n  }\n\n  /**\n   * @private\n   */\n  _parseFileSize(fileSize = 0) {\n    let kb = fileSize / 1024;\n    if (!kb) {\n      return Promise.resolve(undefined);\n    } else if (kb < 1024) {\n      return this.l10n.get('document_properties_kb', {\n        size_kb: (+kb.toPrecision(3)).toLocaleString(),\n        size_b: fileSize.toLocaleString(),\n      }, '{{size_kb}} KB ({{size_b}} bytes)');\n    }\n    return this.l10n.get('document_properties_mb', {\n      size_mb: (+(kb / 1024).toPrecision(3)).toLocaleString(),\n      size_b: fileSize.toLocaleString(),\n    }, '{{size_mb}} MB ({{size_b}} bytes)');\n  }\n\n  /**\n   * @private\n   */\n  _parseDate(inputDate) {\n    if (!inputDate) {\n      return;\n    }\n    // This is implemented according to the PDF specification, but note that\n    // Adobe Reader doesn't handle changing the date to universal time\n    // and doesn't use the user's time zone (they're effectively ignoring\n    // the HH' and mm' parts of the date string).\n    let dateToParse = inputDate;\n\n    // Remove the D: prefix if it is available.\n    if (dateToParse.substring(0, 2) === 'D:') {\n      dateToParse = dateToParse.substring(2);\n    }\n\n    // Get all elements from the PDF date string.\n    // JavaScript's `Date` object expects the month to be between\n    // 0 and 11 instead of 1 and 12, so we're correcting for this.\n    let year = parseInt(dateToParse.substring(0, 4), 10);\n    let month = parseInt(dateToParse.substring(4, 6), 10) - 1;\n    let day = parseInt(dateToParse.substring(6, 8), 10);\n    let hours = parseInt(dateToParse.substring(8, 10), 10);\n    let minutes = parseInt(dateToParse.substring(10, 12), 10);\n    let seconds = parseInt(dateToParse.substring(12, 14), 10);\n    let utRel = dateToParse.substring(14, 15);\n    let offsetHours = parseInt(dateToParse.substring(15, 17), 10);\n    let offsetMinutes = parseInt(dateToParse.substring(18, 20), 10);\n\n    // As per spec, utRel = 'Z' means equal to universal time.\n    // The other cases ('-' and '+') have to be handled here.\n    if (utRel === '-') {\n      hours += offsetHours;\n      minutes += offsetMinutes;\n    } else if (utRel === '+') {\n      hours -= offsetHours;\n      minutes -= offsetMinutes;\n    }\n\n    // Return the new date format from the user's locale.\n    let date = new Date(Date.UTC(year, month, day, hours, minutes, seconds));\n    let dateString = date.toLocaleDateString();\n    let timeString = date.toLocaleTimeString();\n    return this.l10n.get('document_properties_date_string',\n                         { date: dateString, time: timeString, },\n                         '{{date}}, {{time}}');\n  }\n}\n\nexport {\n  PDFDocumentProperties,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/pdf_document_properties.js","/* 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 { FindState } from './pdf_find_controller';\nimport { NullL10n } from './ui_utils';\n\n/**\n * Creates a \"search bar\" given a set of DOM elements that act as controls\n * for searching or for setting search preferences in the UI. This object\n * also sets up the appropriate events for the controls. Actual searching\n * is done by PDFFindController.\n */\nclass PDFFindBar {\n  constructor(options, l10n = NullL10n) {\n    this.opened = false;\n\n    this.bar = options.bar || null;\n    this.toggleButton = options.toggleButton || null;\n    this.findField = options.findField || null;\n    this.highlightAll = options.highlightAllCheckbox || null;\n    this.caseSensitive = options.caseSensitiveCheckbox || null;\n    this.findMsg = options.findMsg || null;\n    this.findResultsCount = options.findResultsCount || null;\n    this.findStatusIcon = options.findStatusIcon || null;\n    this.findPreviousButton = options.findPreviousButton || null;\n    this.findNextButton = options.findNextButton || null;\n    this.findController = options.findController || null;\n    this.eventBus = options.eventBus;\n    this.l10n = l10n;\n\n    if (this.findController === null) {\n      throw new Error('PDFFindBar cannot be used without a ' +\n                      'PDFFindController instance.');\n    }\n\n    // Add event listeners to the DOM elements.\n    this.toggleButton.addEventListener('click', () => {\n      this.toggle();\n    });\n\n    this.findField.addEventListener('input', () => {\n      this.dispatchEvent('');\n    });\n\n    this.bar.addEventListener('keydown', (e) => {\n      switch (e.keyCode) {\n        case 13: // Enter\n          if (e.target === this.findField) {\n            this.dispatchEvent('again', e.shiftKey);\n          }\n          break;\n        case 27: // Escape\n          this.close();\n          break;\n      }\n    });\n\n    this.findPreviousButton.addEventListener('click', () => {\n      this.dispatchEvent('again', true);\n    });\n\n    this.findNextButton.addEventListener('click', () => {\n      this.dispatchEvent('again', false);\n    });\n\n    this.highlightAll.addEventListener('click', () => {\n      this.dispatchEvent('highlightallchange');\n    });\n\n    this.caseSensitive.addEventListener('click', () => {\n      this.dispatchEvent('casesensitivitychange');\n    });\n\n    this.eventBus.on('resize', this._adjustWidth.bind(this));\n  }\n\n  reset() {\n    this.updateUIState();\n  }\n\n  dispatchEvent(type, findPrev) {\n    this.eventBus.dispatch('find', {\n      source: this,\n      type,\n      query: this.findField.value,\n      caseSensitive: this.caseSensitive.checked,\n      phraseSearch: true,\n      highlightAll: this.highlightAll.checked,\n      findPrevious: findPrev,\n    });\n  }\n\n  updateUIState(state, previous, matchCount) {\n    let notFound = false;\n    let findMsg = '';\n    let status = '';\n\n    switch (state) {\n      case FindState.FOUND:\n        break;\n\n      case FindState.PENDING:\n        status = 'pending';\n        break;\n\n      case FindState.NOT_FOUND:\n        findMsg = this.l10n.get('find_not_found', null, 'Phrase not found');\n        notFound = true;\n        break;\n\n      case FindState.WRAPPED:\n        if (previous) {\n          findMsg = this.l10n.get('find_reached_top', null,\n            'Reached top of document, continued from bottom');\n        } else {\n          findMsg = this.l10n.get('find_reached_bottom', null,\n            'Reached end of document, continued from top');\n        }\n        break;\n    }\n\n    if (notFound) {\n      this.findField.classList.add('notFound');\n    } else {\n      this.findField.classList.remove('notFound');\n    }\n\n    this.findField.setAttribute('data-status', status);\n    Promise.resolve(findMsg).then((msg) => {\n      this.findMsg.textContent = msg;\n      this._adjustWidth();\n    });\n\n    this.updateResultsCount(matchCount);\n  }\n\n  updateResultsCount(matchCount) {\n    if (!this.findResultsCount) {\n      return; // No UI control is provided.\n    }\n\n    if (!matchCount) {\n      // If there are no matches, hide and reset the counter.\n      this.findResultsCount.classList.add('hidden');\n      this.findResultsCount.textContent = '';\n    } else {\n      // Update and show the match counter.\n      this.findResultsCount.textContent = matchCount.toLocaleString();\n      this.findResultsCount.classList.remove('hidden');\n    }\n    // Since `updateResultsCount` may be called from `PDFFindController`,\n    // ensure that the width of the findbar is always updated correctly.\n    this._adjustWidth();\n  }\n\n  open() {\n    if (!this.opened) {\n      this.opened = true;\n      this.toggleButton.classList.add('toggled');\n      this.bar.classList.remove('hidden');\n    }\n    this.findField.select();\n    this.findField.focus();\n\n    this._adjustWidth();\n  }\n\n  close() {\n    if (!this.opened) {\n      return;\n    }\n    this.opened = false;\n    this.toggleButton.classList.remove('toggled');\n    this.bar.classList.add('hidden');\n    this.findController.active = false;\n  }\n\n  toggle() {\n    if (this.opened) {\n      this.close();\n    } else {\n      this.open();\n    }\n  }\n\n  /**\n   * @private\n   */\n  _adjustWidth() {\n    if (!this.opened) {\n      return;\n    }\n\n    // The find bar has an absolute position and thus the browser extends\n    // its width to the maximum possible width once the find bar does not fit\n    // entirely within the window anymore (and its elements are automatically\n    // wrapped). Here we detect and fix that.\n    this.bar.classList.remove('wrapContainers');\n\n    let findbarHeight = this.bar.clientHeight;\n    let inputContainerHeight = this.bar.firstElementChild.clientHeight;\n\n    if (findbarHeight > inputContainerHeight) {\n      // The findbar is taller than the input container, which means that\n      // the browser wrapped some of the elements. For a consistent look,\n      // wrap all of them to adjust the width of the find bar.\n      this.bar.classList.add('wrapContainers');\n    }\n  }\n}\n\nexport {\n  PDFFindBar,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/pdf_find_bar.js","/* 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 chrome */\n\nimport { getGlobalEventBus } from './dom_events';\n\nfunction PDFHistory(options) {\n  this.linkService = options.linkService;\n  this.eventBus = options.eventBus || getGlobalEventBus();\n\n  this.initialized = false;\n  this.initialDestination = null;\n  this.initialBookmark = null;\n}\n\nPDFHistory.prototype = {\n  /**\n   * @param {string} fingerprint\n   */\n  initialize: function pdfHistoryInitialize(fingerprint) {\n    this.initialized = true;\n    this.reInitialized = false;\n    this.allowHashChange = true;\n    this.historyUnlocked = true;\n    this.isViewerInPresentationMode = false;\n\n    this.previousHash = window.location.hash.substring(1);\n    this.currentBookmark = '';\n    this.currentPage = 0;\n    this.updatePreviousBookmark = false;\n    this.previousBookmark = '';\n    this.previousPage = 0;\n    this.nextHashParam = '';\n\n    this.fingerprint = fingerprint;\n    this.currentUid = this.uid = 0;\n    this.current = {};\n\n    var state = window.history.state;\n    if (this._isStateObjectDefined(state)) {\n      // This corresponds to navigating back to the document\n      // from another page in the browser history.\n      if (state.target.dest) {\n        this.initialDestination = state.target.dest;\n      } else {\n        this.initialBookmark = state.target.hash;\n      }\n      this.currentUid = state.uid;\n      this.uid = state.uid + 1;\n      this.current = state.target;\n    } else {\n      // This corresponds to the loading of a new document.\n      if (state && state.fingerprint &&\n        this.fingerprint !== state.fingerprint) {\n        // Reinitialize the browsing history when a new document\n        // is opened in the web viewer.\n        this.reInitialized = true;\n      }\n      this._pushOrReplaceState({ fingerprint: this.fingerprint, }, true);\n    }\n\n    var self = this;\n    window.addEventListener('popstate', function pdfHistoryPopstate(evt) {\n      if (!self.historyUnlocked) {\n        return;\n      }\n      if (evt.state) {\n        // Move back/forward in the history.\n        self._goTo(evt.state);\n        return;\n      }\n\n      // If the state is not set, then the user tried to navigate to a\n      // different hash by manually editing the URL and pressing Enter, or by\n      // clicking on an in-page link (e.g. the \"current view\" link).\n      // Save the current view state to the browser history.\n\n      // Note: In Firefox, history.null could also be null after an in-page\n      // navigation to the same URL, and without dispatching the popstate\n      // event: https://bugzilla.mozilla.org/show_bug.cgi?id=1183881\n\n      if (self.uid === 0) {\n        // Replace the previous state if it was not explicitly set.\n        var previousParams = (self.previousHash && self.currentBookmark &&\n          self.previousHash !== self.currentBookmark) ?\n          { hash: self.currentBookmark, page: self.currentPage, } :\n          { page: 1, };\n        replacePreviousHistoryState(previousParams, function() {\n          updateHistoryWithCurrentHash();\n        });\n      } else {\n        updateHistoryWithCurrentHash();\n      }\n    });\n\n\n    function updateHistoryWithCurrentHash() {\n      self.previousHash = window.location.hash.slice(1);\n      self._pushToHistory({ hash: self.previousHash, }, false, true);\n      self._updatePreviousBookmark();\n    }\n\n    function replacePreviousHistoryState(params, callback) {\n      // To modify the previous history entry, the following happens:\n      // 1. history.back()\n      // 2. _pushToHistory, which calls history.replaceState( ... )\n      // 3. history.forward()\n      // Because a navigation via the history API does not immediately update\n      // the history state, the popstate event is used for synchronization.\n      self.historyUnlocked = false;\n\n      // Suppress the hashchange event to avoid side effects caused by\n      // navigating back and forward.\n      self.allowHashChange = false;\n      window.addEventListener('popstate', rewriteHistoryAfterBack);\n      history.back();\n\n      function rewriteHistoryAfterBack() {\n        window.removeEventListener('popstate', rewriteHistoryAfterBack);\n        window.addEventListener('popstate', rewriteHistoryAfterForward);\n        self._pushToHistory(params, false, true);\n        history.forward();\n      }\n      function rewriteHistoryAfterForward() {\n        window.removeEventListener('popstate', rewriteHistoryAfterForward);\n        self.allowHashChange = true;\n        self.historyUnlocked = true;\n        callback();\n      }\n    }\n\n    function pdfHistoryBeforeUnload() {\n      var previousParams = self._getPreviousParams(null, true);\n      if (previousParams) {\n        var replacePrevious = (!self.current.dest &&\n        self.current.hash !== self.previousHash);\n        self._pushToHistory(previousParams, false, replacePrevious);\n        self._updatePreviousBookmark();\n      }\n      // Remove the event listener when navigating away from the document,\n      // since 'beforeunload' prevents Firefox from caching the document.\n      window.removeEventListener('beforeunload', pdfHistoryBeforeUnload);\n    }\n\n    window.addEventListener('beforeunload', pdfHistoryBeforeUnload);\n\n    window.addEventListener('pageshow', function pdfHistoryPageShow(evt) {\n      // If the entire viewer (including the PDF file) is cached in\n      // the browser, we need to reattach the 'beforeunload' event listener\n      // since the 'DOMContentLoaded' event is not fired on 'pageshow'.\n      window.addEventListener('beforeunload', pdfHistoryBeforeUnload);\n    });\n\n    self.eventBus.on('presentationmodechanged', function(e) {\n      self.isViewerInPresentationMode = e.active;\n    });\n  },\n\n  clearHistoryState: function pdfHistory_clearHistoryState() {\n    this._pushOrReplaceState(null, true);\n  },\n\n  _isStateObjectDefined: function pdfHistory_isStateObjectDefined(state) {\n    return (state && state.uid >= 0 &&\n    state.fingerprint && this.fingerprint === state.fingerprint &&\n    state.target && state.target.hash) ? true : false;\n  },\n\n  _pushOrReplaceState: function pdfHistory_pushOrReplaceState(stateObj,\n                                                              replace) {\n    // history.state.chromecomState is managed by chromecom.js.\n    if (typeof PDFJSDev !== 'undefined' && PDFJSDev.test('CHROME') &&\n        window.history.state && 'chromecomState' in window.history.state) {\n      stateObj = stateObj || {};\n      stateObj.chromecomState = window.history.state.chromecomState;\n    }\n    if (replace) {\n      if (typeof PDFJSDev === 'undefined' ||\n          PDFJSDev.test('GENERIC || CHROME')) {\n        window.history.replaceState(stateObj, '', document.URL);\n      } else {\n        window.history.replaceState(stateObj, '');\n      }\n    } else {\n      if (typeof PDFJSDev === 'undefined' ||\n          PDFJSDev.test('GENERIC || CHROME')) {\n        window.history.pushState(stateObj, '', document.URL);\n      } else {\n        window.history.pushState(stateObj, '');\n      }\n      if (typeof PDFJSDev !== 'undefined' && PDFJSDev.test('CHROME') &&\n          top === window) {\n        chrome.runtime.sendMessage('showPageAction');\n      }\n    }\n  },\n\n  get isHashChangeUnlocked() {\n    if (!this.initialized) {\n      return true;\n    }\n    return this.allowHashChange;\n  },\n\n  _updatePreviousBookmark: function pdfHistory_updatePreviousBookmark() {\n    if (this.updatePreviousBookmark &&\n      this.currentBookmark && this.currentPage) {\n      this.previousBookmark = this.currentBookmark;\n      this.previousPage = this.currentPage;\n      this.updatePreviousBookmark = false;\n    }\n  },\n\n  updateCurrentBookmark: function pdfHistoryUpdateCurrentBookmark(bookmark,\n                                                                  pageNum) {\n    if (this.initialized) {\n      this.currentBookmark = bookmark.substring(1);\n      this.currentPage = pageNum | 0;\n      this._updatePreviousBookmark();\n    }\n  },\n\n  updateNextHashParam: function pdfHistoryUpdateNextHashParam(param) {\n    if (this.initialized) {\n      this.nextHashParam = param;\n    }\n  },\n\n  push: function pdfHistoryPush(params, isInitialBookmark) {\n    if (!(this.initialized && this.historyUnlocked)) {\n      return;\n    }\n    if (params.dest && !params.hash) {\n      params.hash = (this.current.hash && this.current.dest &&\n      this.current.dest === params.dest) ?\n        this.current.hash :\n        this.linkService.getDestinationHash(params.dest).split('#')[1];\n    }\n    if (params.page) {\n      params.page |= 0;\n    }\n    if (isInitialBookmark) {\n      var target = window.history.state.target;\n      if (!target) {\n        // Invoked when the user specifies an initial bookmark,\n        // thus setting initialBookmark, when the document is loaded.\n        this._pushToHistory(params, false);\n        this.previousHash = window.location.hash.substring(1);\n      }\n      this.updatePreviousBookmark = this.nextHashParam ? false : true;\n      if (target) {\n        // If the current document is reloaded,\n        // avoid creating duplicate entries in the history.\n        this._updatePreviousBookmark();\n      }\n      return;\n    }\n    if (this.nextHashParam) {\n      if (this.nextHashParam === params.hash) {\n        this.nextHashParam = null;\n        this.updatePreviousBookmark = true;\n        return;\n      }\n      this.nextHashParam = null;\n    }\n\n    if (params.hash) {\n      if (this.current.hash) {\n        if (this.current.hash !== params.hash) {\n          this._pushToHistory(params, true);\n        } else {\n          if (!this.current.page && params.page) {\n            this._pushToHistory(params, false, true);\n          }\n          this.updatePreviousBookmark = true;\n        }\n      } else {\n        this._pushToHistory(params, true);\n      }\n    } else if (this.current.page && params.page &&\n      this.current.page !== params.page) {\n      this._pushToHistory(params, true);\n    }\n  },\n\n  _getPreviousParams: function pdfHistory_getPreviousParams(onlyCheckPage,\n                                                            beforeUnload) {\n    if (!(this.currentBookmark && this.currentPage)) {\n      return null;\n    } else if (this.updatePreviousBookmark) {\n      this.updatePreviousBookmark = false;\n    }\n    if (this.uid > 0 && !(this.previousBookmark && this.previousPage)) {\n      // Prevent the history from getting stuck in the current state,\n      // effectively preventing the user from going back/forward in\n      // the history.\n      //\n      // This happens if the current position in the document didn't change\n      // when the history was previously updated. The reasons for this are\n      // either:\n      // 1. The current zoom value is such that the document does not need to,\n      //    or cannot, be scrolled to display the destination.\n      // 2. The previous destination is broken, and doesn't actally point to a\n      //    position within the document.\n      //    (This is either due to a bad PDF generator, or the user making a\n      //     mistake when entering a destination in the hash parameters.)\n      return null;\n    }\n    if ((!this.current.dest && !onlyCheckPage) || beforeUnload) {\n      if (this.previousBookmark === this.currentBookmark) {\n        return null;\n      }\n    } else if (this.current.page || onlyCheckPage) {\n      if (this.previousPage === this.currentPage) {\n        return null;\n      }\n    } else {\n      return null;\n    }\n    var params = { hash: this.currentBookmark, page: this.currentPage, };\n    if (this.isViewerInPresentationMode) {\n      params.hash = null;\n    }\n    return params;\n  },\n\n  _stateObj: function pdfHistory_stateObj(params) {\n    return { fingerprint: this.fingerprint, uid: this.uid, target: params, };\n  },\n\n  _pushToHistory: function pdfHistory_pushToHistory(params,\n                                                    addPrevious, overwrite) {\n    if (!this.initialized) {\n      return;\n    }\n    if (!params.hash && params.page) {\n      params.hash = ('page=' + params.page);\n    }\n    if (addPrevious && !overwrite) {\n      var previousParams = this._getPreviousParams();\n      if (previousParams) {\n        var replacePrevious = (!this.current.dest &&\n        this.current.hash !== this.previousHash);\n        this._pushToHistory(previousParams, false, replacePrevious);\n      }\n    }\n    this._pushOrReplaceState(this._stateObj(params),\n      (overwrite || this.uid === 0));\n    this.currentUid = this.uid++;\n    this.current = params;\n    this.updatePreviousBookmark = true;\n  },\n\n  _goTo: function pdfHistory_goTo(state) {\n    if (!(this.initialized && this.historyUnlocked &&\n      this._isStateObjectDefined(state))) {\n      return;\n    }\n    if (!this.reInitialized && state.uid < this.currentUid) {\n      var previousParams = this._getPreviousParams(true);\n      if (previousParams) {\n        this._pushToHistory(this.current, false);\n        this._pushToHistory(previousParams, false);\n        this.currentUid = state.uid;\n        window.history.back();\n        return;\n      }\n    }\n    this.historyUnlocked = false;\n\n    if (state.target.dest) {\n      this.linkService.navigateTo(state.target.dest);\n    } else {\n      this.linkService.setHash(state.target.hash);\n    }\n    this.currentUid = state.uid;\n    if (state.uid > this.uid) {\n      this.uid = state.uid;\n    }\n    this.current = state.target;\n    this.updatePreviousBookmark = true;\n\n    var currentHash = window.location.hash.substring(1);\n    if (this.previousHash !== currentHash) {\n      this.allowHashChange = false;\n    }\n    this.previousHash = currentHash;\n\n    this.historyUnlocked = true;\n  },\n\n  back: function pdfHistoryBack() {\n    this.go(-1);\n  },\n\n  forward: function pdfHistoryForward() {\n    this.go(1);\n  },\n\n  go: function pdfHistoryGo(direction) {\n    if (this.initialized && this.historyUnlocked) {\n      var state = window.history.state;\n      if (direction === -1 && state && state.uid > 0) {\n        window.history.back();\n      } else if (direction === 1 && state && state.uid < (this.uid - 1)) {\n        window.history.forward();\n      }\n    }\n  },\n};\n\nexport {\n  PDFHistory,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/pdf_history.js","/* 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  addLinkAttributes, PDFJS, removeNullCharacters\n} from 'pdfjs-lib';\n\nconst DEFAULT_TITLE = '\\u2013';\n\n/**\n * @typedef {Object} PDFOutlineViewerOptions\n * @property {HTMLDivElement} container - The viewer element.\n * @property {IPDFLinkService} linkService - The navigation/linking service.\n * @property {EventBus} eventBus - The application event bus.\n */\n\n/**\n * @typedef {Object} PDFOutlineViewerRenderParameters\n * @property {Array|null} outline - An array of outline objects.\n */\n\nclass PDFOutlineViewer {\n  /**\n   * @param {PDFOutlineViewerOptions} options\n   */\n  constructor({ container, linkService, eventBus, }) {\n    this.outline = null;\n    this.lastToggleIsShow = true;\n\n    this.container = container;\n    this.linkService = linkService;\n    this.eventBus = eventBus;\n  }\n\n  reset() {\n    this.outline = null;\n    this.lastToggleIsShow = true;\n\n    // Remove the outline from the DOM.\n    this.container.textContent = '';\n\n    // Ensure that the left (right in RTL locales) margin is always reset,\n    // to prevent incorrect outline alignment if a new document is opened.\n    this.container.classList.remove('outlineWithDeepNesting');\n  }\n\n  /**\n   * @private\n   */\n  _dispatchEvent(outlineCount) {\n    this.eventBus.dispatch('outlineloaded', {\n      source: this,\n      outlineCount,\n    });\n  }\n\n  /**\n   * @private\n   */\n  _bindLink(element, item) {\n    if (item.url) {\n      addLinkAttributes(element, {\n        url: item.url,\n        target: (item.newWindow ? PDFJS.LinkTarget.BLANK : undefined),\n      });\n      return;\n    }\n    let destination = item.dest;\n\n    element.href = this.linkService.getDestinationHash(destination);\n    element.onclick = () => {\n      if (destination) {\n        this.linkService.navigateTo(destination);\n      }\n      return false;\n    };\n  }\n\n  /**\n   * @private\n   */\n  _setStyles(element, item) {\n    let styleStr = '';\n    if (item.bold) {\n      styleStr += 'font-weight: bold;';\n    }\n    if (item.italic) {\n      styleStr += 'font-style: italic;';\n    }\n\n    if (styleStr) {\n      element.setAttribute('style', styleStr);\n    }\n  }\n\n  /**\n   * Prepend a button before an outline item which allows the user to toggle\n   * the visibility of all outline items at that level.\n   *\n   * @private\n   */\n  _addToggleButton(div) {\n    let toggler = document.createElement('div');\n    toggler.className = 'outlineItemToggler';\n    toggler.onclick = (evt) => {\n      evt.stopPropagation();\n      toggler.classList.toggle('outlineItemsHidden');\n\n      if (evt.shiftKey) {\n        let shouldShowAll = !toggler.classList.contains('outlineItemsHidden');\n        this._toggleOutlineItem(div, shouldShowAll);\n      }\n    };\n    div.insertBefore(toggler, div.firstChild);\n  }\n\n  /**\n   * Toggle the visibility of the subtree of an outline item.\n   *\n   * @param {Element} root - the root of the outline (sub)tree.\n   * @param {boolean} show - whether to show the outline (sub)tree. If false,\n   *   the outline subtree rooted at |root| will be collapsed.\n   *\n   * @private\n   */\n  _toggleOutlineItem(root, show) {\n    this.lastToggleIsShow = show;\n    let togglers = root.querySelectorAll('.outlineItemToggler');\n    for (let i = 0, ii = togglers.length; i < ii; ++i) {\n      togglers[i].classList[show ? 'remove' : 'add']('outlineItemsHidden');\n    }\n  }\n\n  /**\n   * Collapse or expand all subtrees of the outline.\n   */\n  toggleOutlineTree() {\n    if (!this.outline) {\n      return;\n    }\n    this._toggleOutlineItem(this.container, !this.lastToggleIsShow);\n  }\n\n  /**\n   * @param {PDFOutlineViewerRenderParameters} params\n   */\n  render({ outline, }) {\n    let outlineCount = 0;\n\n    if (this.outline) {\n      this.reset();\n    }\n    this.outline = outline || null;\n\n    if (!outline) {\n      this._dispatchEvent(outlineCount);\n      return;\n    }\n\n    let fragment = document.createDocumentFragment();\n    let queue = [{ parent: fragment, items: this.outline, }];\n    let hasAnyNesting = false;\n    while (queue.length > 0) {\n      let levelData = queue.shift();\n      for (let i = 0, len = levelData.items.length; i < len; i++) {\n        let item = levelData.items[i];\n\n        let div = document.createElement('div');\n        div.className = 'outlineItem';\n\n        let element = document.createElement('a');\n        this._bindLink(element, item);\n        this._setStyles(element, item);\n        element.textContent =\n          removeNullCharacters(item.title) || DEFAULT_TITLE;\n\n        div.appendChild(element);\n\n        if (item.items.length > 0) {\n          hasAnyNesting = true;\n          this._addToggleButton(div);\n\n          let itemsDiv = document.createElement('div');\n          itemsDiv.className = 'outlineItems';\n          div.appendChild(itemsDiv);\n          queue.push({ parent: itemsDiv, items: item.items, });\n        }\n\n        levelData.parent.appendChild(div);\n        outlineCount++;\n      }\n    }\n    if (hasAnyNesting) {\n      this.container.classList.add('outlineWithDeepNesting');\n    }\n\n    this.container.appendChild(fragment);\n\n    this._dispatchEvent(outlineCount);\n  }\n}\n\nexport {\n  PDFOutlineViewer,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/pdf_outline_viewer.js","/* 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  approximateFraction, CSS_UNITS, DEFAULT_SCALE, getOutputScale, NullL10n,\n  RendererType, roundToDivide\n} from './ui_utils';\nimport {\n  createPromiseCapability, CustomStyle, PDFJS, RenderingCancelledException,\n  SVGGraphics\n} from 'pdfjs-lib';\nimport { getGlobalEventBus } from './dom_events';\nimport { RenderingStates } from './pdf_rendering_queue';\n\n/**\n * @typedef {Object} PDFPageViewOptions\n * @property {HTMLDivElement} container - The viewer element.\n * @property {EventBus} eventBus - The application event bus.\n * @property {number} id - The page unique ID (normally its number).\n * @property {number} scale - The page scale display.\n * @property {PageViewport} defaultViewport - The page viewport.\n * @property {PDFRenderingQueue} renderingQueue - The rendering queue object.\n * @property {IPDFTextLayerFactory} textLayerFactory\n * @property {IPDFAnnotationLayerFactory} annotationLayerFactory\n * @property {boolean} enhanceTextSelection - Turns on the text selection\n *   enhancement. The default is `false`.\n * @property {boolean} renderInteractiveForms - Turns on rendering of\n *   interactive form elements. The default is `false`.\n * @property {string} renderer - 'canvas' or 'svg'. The default is 'canvas'.\n * @property {IL10n} l10n - Localization service.\n */\n\n/**\n * @implements {IRenderableView}\n */\nclass PDFPageView {\n  /**\n   * @param {PDFPageViewOptions} options\n   */\n  constructor(options) {\n    let container = options.container;\n    let defaultViewport = options.defaultViewport;\n\n    this.id = options.id;\n    this.renderingId = 'page' + this.id;\n\n    this.pdfPage = null;\n    this.pageLabel = null;\n    this.rotation = 0;\n    this.scale = options.scale || DEFAULT_SCALE;\n    this.viewport = defaultViewport;\n    this.pdfPageRotate = defaultViewport.rotation;\n    this.hasRestrictedScaling = false;\n    this.enhanceTextSelection = options.enhanceTextSelection || false;\n    this.renderInteractiveForms = options.renderInteractiveForms || false;\n\n    this.eventBus = options.eventBus || getGlobalEventBus();\n    this.renderingQueue = options.renderingQueue;\n    this.textLayerFactory = options.textLayerFactory;\n    this.annotationLayerFactory = options.annotationLayerFactory;\n    this.renderer = options.renderer || RendererType.CANVAS;\n    this.l10n = options.l10n || NullL10n;\n\n    this.paintTask = null;\n    this.paintedViewportMap = new WeakMap();\n    this.renderingState = RenderingStates.INITIAL;\n    this.resume = null;\n    this.error = null;\n\n    this.onBeforeDraw = null;\n    this.onAfterDraw = null;\n\n    this.annotationLayer = null;\n    this.textLayer = null;\n    this.zoomLayer = null;\n\n    let div = document.createElement('div');\n    div.className = 'page';\n    div.style.width = Math.floor(this.viewport.width) + 'px';\n    div.style.height = Math.floor(this.viewport.height) + 'px';\n    div.setAttribute('data-page-number', this.id);\n    this.div = div;\n\n    container.appendChild(div);\n  }\n\n  setPdfPage(pdfPage) {\n    this.pdfPage = pdfPage;\n    this.pdfPageRotate = pdfPage.rotate;\n\n    let totalRotation = (this.rotation + this.pdfPageRotate) % 360;\n    this.viewport = pdfPage.getViewport(this.scale * CSS_UNITS,\n                                        totalRotation);\n    this.stats = pdfPage.stats;\n    this.reset();\n  }\n\n  destroy() {\n    this.reset();\n    if (this.pdfPage) {\n      this.pdfPage.cleanup();\n      this.pdfPage = null;\n    }\n  }\n\n  /**\n   * @private\n   */\n  _resetZoomLayer(removeFromDOM = false) {\n    if (!this.zoomLayer) {\n      return;\n    }\n    let zoomLayerCanvas = this.zoomLayer.firstChild;\n    this.paintedViewportMap.delete(zoomLayerCanvas);\n    // Zeroing the width and height causes Firefox to release graphics\n    // resources immediately, which can greatly reduce memory consumption.\n    zoomLayerCanvas.width = 0;\n    zoomLayerCanvas.height = 0;\n\n    if (removeFromDOM) {\n      // Note: `ChildNode.remove` doesn't throw if the parent node is undefined.\n      this.zoomLayer.remove();\n    }\n    this.zoomLayer = null;\n  }\n\n  reset(keepZoomLayer = false, keepAnnotations = false) {\n    this.cancelRendering();\n\n    let div = this.div;\n    div.style.width = Math.floor(this.viewport.width) + 'px';\n    div.style.height = Math.floor(this.viewport.height) + 'px';\n\n    let childNodes = div.childNodes;\n    let currentZoomLayerNode = (keepZoomLayer && this.zoomLayer) || null;\n    let currentAnnotationNode = (keepAnnotations && this.annotationLayer &&\n                                 this.annotationLayer.div) || null;\n    for (let i = childNodes.length - 1; i >= 0; i--) {\n      let node = childNodes[i];\n      if (currentZoomLayerNode === node || currentAnnotationNode === node) {\n        continue;\n      }\n      div.removeChild(node);\n    }\n    div.removeAttribute('data-loaded');\n\n    if (currentAnnotationNode) {\n      // Hide the annotation layer until all elements are resized\n      // so they are not displayed on the already resized page.\n      this.annotationLayer.hide();\n    } else {\n      this.annotationLayer = null;\n    }\n\n    if (!currentZoomLayerNode) {\n      if (this.canvas) {\n        this.paintedViewportMap.delete(this.canvas);\n        // Zeroing the width and height causes Firefox to release graphics\n        // resources immediately, which can greatly reduce memory consumption.\n        this.canvas.width = 0;\n        this.canvas.height = 0;\n        delete this.canvas;\n      }\n      this._resetZoomLayer();\n    }\n    if (this.svg) {\n      this.paintedViewportMap.delete(this.svg);\n      delete this.svg;\n    }\n\n    this.loadingIconDiv = document.createElement('div');\n    this.loadingIconDiv.className = 'loadingIcon';\n    div.appendChild(this.loadingIconDiv);\n  }\n\n  update(scale, rotation) {\n    this.scale = scale || this.scale;\n    if (typeof rotation !== 'undefined') { // The rotation may be zero.\n      this.rotation = rotation;\n    }\n\n    let totalRotation = (this.rotation + this.pdfPageRotate) % 360;\n    this.viewport = this.viewport.clone({\n      scale: this.scale * CSS_UNITS,\n      rotation: totalRotation,\n    });\n\n    if (this.svg) {\n      this.cssTransform(this.svg, true);\n\n      this.eventBus.dispatch('pagerendered', {\n        source: this,\n        pageNumber: this.id,\n        cssTransform: true,\n      });\n      return;\n    }\n\n    let isScalingRestricted = false;\n    if (this.canvas && PDFJS.maxCanvasPixels > 0) {\n      let outputScale = this.outputScale;\n      if (((Math.floor(this.viewport.width) * outputScale.sx) | 0) *\n          ((Math.floor(this.viewport.height) * outputScale.sy) | 0) >\n          PDFJS.maxCanvasPixels) {\n        isScalingRestricted = true;\n      }\n    }\n\n    if (this.canvas) {\n      if (PDFJS.useOnlyCssZoom ||\n          (this.hasRestrictedScaling && isScalingRestricted)) {\n        this.cssTransform(this.canvas, true);\n\n        this.eventBus.dispatch('pagerendered', {\n          source: this,\n          pageNumber: this.id,\n          cssTransform: true,\n        });\n        return;\n      }\n      if (!this.zoomLayer && !this.canvas.hasAttribute('hidden')) {\n        this.zoomLayer = this.canvas.parentNode;\n        this.zoomLayer.style.position = 'absolute';\n      }\n    }\n    if (this.zoomLayer) {\n      this.cssTransform(this.zoomLayer.firstChild);\n    }\n    this.reset(/* keepZoomLayer = */ true, /* keepAnnotations = */ true);\n  }\n\n  cancelRendering() {\n    if (this.paintTask) {\n      this.paintTask.cancel();\n      this.paintTask = null;\n    }\n    this.renderingState = RenderingStates.INITIAL;\n    this.resume = null;\n\n    if (this.textLayer) {\n      this.textLayer.cancel();\n      this.textLayer = null;\n    }\n  }\n\n  cssTransform(target, redrawAnnotations = false) {\n    // Scale target (canvas or svg), its wrapper and page container.\n    let width = this.viewport.width;\n    let height = this.viewport.height;\n    let div = this.div;\n    target.style.width = target.parentNode.style.width = div.style.width =\n      Math.floor(width) + 'px';\n    target.style.height = target.parentNode.style.height = div.style.height =\n      Math.floor(height) + 'px';\n    // The canvas may have been originally rotated; rotate relative to that.\n    let relativeRotation = this.viewport.rotation -\n                           this.paintedViewportMap.get(target).rotation;\n    let absRotation = Math.abs(relativeRotation);\n    let scaleX = 1, scaleY = 1;\n    if (absRotation === 90 || absRotation === 270) {\n      // Scale x and y because of the rotation.\n      scaleX = height / width;\n      scaleY = width / height;\n    }\n    let cssTransform = 'rotate(' + relativeRotation + 'deg) ' +\n      'scale(' + scaleX + ',' + scaleY + ')';\n    CustomStyle.setProp('transform', target, cssTransform);\n\n    if (this.textLayer) {\n      // Rotating the text layer is more complicated since the divs inside the\n      // the text layer are rotated.\n      // TODO: This could probably be simplified by drawing the text layer in\n      // one orientation and then rotating overall.\n      let textLayerViewport = this.textLayer.viewport;\n      let textRelativeRotation = this.viewport.rotation -\n        textLayerViewport.rotation;\n      let textAbsRotation = Math.abs(textRelativeRotation);\n      let scale = width / textLayerViewport.width;\n      if (textAbsRotation === 90 || textAbsRotation === 270) {\n        scale = width / textLayerViewport.height;\n      }\n      let textLayerDiv = this.textLayer.textLayerDiv;\n      let transX, transY;\n      switch (textAbsRotation) {\n        case 0:\n          transX = transY = 0;\n          break;\n        case 90:\n          transX = 0;\n          transY = '-' + textLayerDiv.style.height;\n          break;\n        case 180:\n          transX = '-' + textLayerDiv.style.width;\n          transY = '-' + textLayerDiv.style.height;\n          break;\n        case 270:\n          transX = '-' + textLayerDiv.style.width;\n          transY = 0;\n          break;\n        default:\n          console.error('Bad rotation value.');\n          break;\n      }\n      CustomStyle.setProp('transform', textLayerDiv,\n          'rotate(' + textAbsRotation + 'deg) ' +\n          'scale(' + scale + ', ' + scale + ') ' +\n          'translate(' + transX + ', ' + transY + ')');\n      CustomStyle.setProp('transformOrigin', textLayerDiv, '0% 0%');\n    }\n\n    if (redrawAnnotations && this.annotationLayer) {\n      this.annotationLayer.render(this.viewport, 'display');\n    }\n  }\n\n  get width() {\n    return this.viewport.width;\n  }\n\n  get height() {\n    return this.viewport.height;\n  }\n\n  getPagePoint(x, y) {\n    return this.viewport.convertToPdfPoint(x, y);\n  }\n\n  draw() {\n    if (this.renderingState !== RenderingStates.INITIAL) {\n      console.error('Must be in new state before drawing');\n      this.reset(); // Ensure that we reset all state to prevent issues.\n    }\n\n    if (!this.pdfPage) {\n      this.renderingState = RenderingStates.FINISHED;\n      return Promise.reject(new Error('Page is not loaded'));\n    }\n\n    this.renderingState = RenderingStates.RUNNING;\n\n    let pdfPage = this.pdfPage;\n    let div = this.div;\n    // Wrap the canvas so that if it has a CSS transform for high DPI the\n    // overflow will be hidden in Firefox.\n    let canvasWrapper = document.createElement('div');\n    canvasWrapper.style.width = div.style.width;\n    canvasWrapper.style.height = div.style.height;\n    canvasWrapper.classList.add('canvasWrapper');\n\n    if (this.annotationLayer && this.annotationLayer.div) {\n      // The annotation layer needs to stay on top.\n      div.insertBefore(canvasWrapper, this.annotationLayer.div);\n    } else {\n      div.appendChild(canvasWrapper);\n    }\n\n    let textLayer = null;\n    if (this.textLayerFactory) {\n      let textLayerDiv = document.createElement('div');\n      textLayerDiv.className = 'textLayer';\n      textLayerDiv.style.width = canvasWrapper.style.width;\n      textLayerDiv.style.height = canvasWrapper.style.height;\n      if (this.annotationLayer && this.annotationLayer.div) {\n        // The annotation layer needs to stay on top.\n        div.insertBefore(textLayerDiv, this.annotationLayer.div);\n      } else {\n        div.appendChild(textLayerDiv);\n      }\n\n      textLayer = this.textLayerFactory.\n        createTextLayerBuilder(textLayerDiv, this.id - 1, this.viewport,\n                               this.enhanceTextSelection);\n    }\n    this.textLayer = textLayer;\n\n    let renderContinueCallback = null;\n    if (this.renderingQueue) {\n      renderContinueCallback = (cont) => {\n        if (!this.renderingQueue.isHighestPriority(this)) {\n          this.renderingState = RenderingStates.PAUSED;\n          this.resume = () => {\n            this.renderingState = RenderingStates.RUNNING;\n            cont();\n          };\n          return;\n        }\n        cont();\n      };\n    }\n\n    let finishPaintTask = (error) => {\n      // The paintTask may have been replaced by a new one, so only remove\n      // the reference to the paintTask if it matches the one that is\n      // triggering this callback.\n      if (paintTask === this.paintTask) {\n        this.paintTask = null;\n      }\n\n      if (((typeof PDFJSDev === 'undefined' ||\n            !PDFJSDev.test('PDFJS_NEXT')) && error === 'cancelled') ||\n          error instanceof RenderingCancelledException) {\n        this.error = null;\n        return Promise.resolve(undefined);\n      }\n\n      this.renderingState = RenderingStates.FINISHED;\n\n      if (this.loadingIconDiv) {\n        div.removeChild(this.loadingIconDiv);\n        delete this.loadingIconDiv;\n      }\n      this._resetZoomLayer(/* removeFromDOM = */ true);\n\n      this.error = error;\n      this.stats = pdfPage.stats;\n      if (this.onAfterDraw) {\n        this.onAfterDraw();\n      }\n      this.eventBus.dispatch('pagerendered', {\n        source: this,\n        pageNumber: this.id,\n        cssTransform: false,\n      });\n\n      if (error) {\n        return Promise.reject(error);\n      }\n      return Promise.resolve(undefined);\n    };\n\n    let paintTask = this.renderer === RendererType.SVG ?\n      this.paintOnSvg(canvasWrapper) :\n      this.paintOnCanvas(canvasWrapper);\n    paintTask.onRenderContinue = renderContinueCallback;\n    this.paintTask = paintTask;\n\n    let resultPromise = paintTask.promise.then(function() {\n      return finishPaintTask(null).then(function () {\n        if (textLayer) {\n          let readableStream = pdfPage.streamTextContent({\n            normalizeWhitespace: true,\n          });\n          textLayer.setTextContentStream(readableStream);\n          textLayer.render();\n        }\n      });\n    }, function(reason) {\n      return finishPaintTask(reason);\n    });\n\n    if (this.annotationLayerFactory) {\n      if (!this.annotationLayer) {\n        this.annotationLayer = this.annotationLayerFactory.\n          createAnnotationLayerBuilder(div, pdfPage,\n                                       this.renderInteractiveForms, this.l10n);\n      }\n      this.annotationLayer.render(this.viewport, 'display');\n    }\n    div.setAttribute('data-loaded', true);\n\n    if (this.onBeforeDraw) {\n      this.onBeforeDraw();\n    }\n    return resultPromise;\n  }\n\n  paintOnCanvas(canvasWrapper) {\n    let renderCapability = createPromiseCapability();\n    let result = {\n      promise: renderCapability.promise,\n      onRenderContinue(cont) {\n        cont();\n      },\n      cancel() {\n        renderTask.cancel();\n      },\n    };\n\n    let viewport = this.viewport;\n    let canvas = document.createElement('canvas');\n    canvas.id = this.renderingId;\n\n    // Keep the canvas hidden until the first draw callback, or until drawing\n    // is complete when `!this.renderingQueue`, to prevent black flickering.\n    canvas.setAttribute('hidden', 'hidden');\n    let isCanvasHidden = true;\n    let showCanvas = function () {\n      if (isCanvasHidden) {\n        canvas.removeAttribute('hidden');\n        isCanvasHidden = false;\n      }\n    };\n\n    canvasWrapper.appendChild(canvas);\n    this.canvas = canvas;\n\n    if (typeof PDFJSDev === 'undefined' ||\n        PDFJSDev.test('MOZCENTRAL || FIREFOX || GENERIC')) {\n      canvas.mozOpaque = true;\n    }\n\n    let ctx = canvas.getContext('2d', { alpha: false, });\n    let outputScale = getOutputScale(ctx);\n    this.outputScale = outputScale;\n\n    if (PDFJS.useOnlyCssZoom) {\n      let actualSizeViewport = viewport.clone({ scale: CSS_UNITS, });\n      // Use a scale that makes the canvas have the originally intended size\n      // of the page.\n      outputScale.sx *= actualSizeViewport.width / viewport.width;\n      outputScale.sy *= actualSizeViewport.height / viewport.height;\n      outputScale.scaled = true;\n    }\n\n    if (PDFJS.maxCanvasPixels > 0) {\n      let pixelsInViewport = viewport.width * viewport.height;\n      let maxScale = Math.sqrt(PDFJS.maxCanvasPixels / pixelsInViewport);\n      if (outputScale.sx > maxScale || outputScale.sy > maxScale) {\n        outputScale.sx = maxScale;\n        outputScale.sy = maxScale;\n        outputScale.scaled = true;\n        this.hasRestrictedScaling = true;\n      } else {\n        this.hasRestrictedScaling = false;\n      }\n    }\n\n    let sfx = approximateFraction(outputScale.sx);\n    let sfy = approximateFraction(outputScale.sy);\n    canvas.width = roundToDivide(viewport.width * outputScale.sx, sfx[0]);\n    canvas.height = roundToDivide(viewport.height * outputScale.sy, sfy[0]);\n    canvas.style.width = roundToDivide(viewport.width, sfx[1]) + 'px';\n    canvas.style.height = roundToDivide(viewport.height, sfy[1]) + 'px';\n    // Add the viewport so it's known what it was originally drawn with.\n    this.paintedViewportMap.set(canvas, viewport);\n\n    // Rendering area\n    let transform = !outputScale.scaled ? null :\n      [outputScale.sx, 0, 0, outputScale.sy, 0, 0];\n    let renderContext = {\n      canvasContext: ctx,\n      transform,\n      viewport: this.viewport,\n      renderInteractiveForms: this.renderInteractiveForms,\n    };\n    let renderTask = this.pdfPage.render(renderContext);\n    renderTask.onContinue = function (cont) {\n      showCanvas();\n      if (result.onRenderContinue) {\n        result.onRenderContinue(cont);\n      } else {\n        cont();\n      }\n    };\n\n    renderTask.promise.then(function() {\n      showCanvas();\n      renderCapability.resolve(undefined);\n    }, function(error) {\n      showCanvas();\n      renderCapability.reject(error);\n    });\n    return result;\n  }\n\n  paintOnSvg(wrapper) {\n    if (typeof PDFJSDev !== 'undefined' &&\n        PDFJSDev.test('FIREFOX || MOZCENTRAL || CHROME')) {\n      // Return a mock object, to prevent errors such as e.g.\n      // \"TypeError: paintTask.promise is undefined\".\n      return {\n        promise: Promise.reject(new Error('SVG rendering is not supported.')),\n        onRenderContinue(cont) { },\n        cancel() { },\n      };\n    }\n\n    let cancelled = false;\n    let ensureNotCancelled = () => {\n      if (cancelled) {\n        if ((typeof PDFJSDev !== 'undefined' &&\n             PDFJSDev.test('PDFJS_NEXT')) || PDFJS.pdfjsNext) {\n          throw new RenderingCancelledException(\n            'Rendering cancelled, page ' + this.id, 'svg');\n        } else {\n          throw 'cancelled'; // eslint-disable-line no-throw-literal\n        }\n      }\n    };\n\n    let pdfPage = this.pdfPage;\n    let actualSizeViewport = this.viewport.clone({ scale: CSS_UNITS, });\n    let promise = pdfPage.getOperatorList().then((opList) => {\n      ensureNotCancelled();\n      let svgGfx = new SVGGraphics(pdfPage.commonObjs, pdfPage.objs);\n      return svgGfx.getSVG(opList, actualSizeViewport).then((svg) => {\n        ensureNotCancelled();\n        this.svg = svg;\n        this.paintedViewportMap.set(svg, actualSizeViewport);\n\n        svg.style.width = wrapper.style.width;\n        svg.style.height = wrapper.style.height;\n        this.renderingState = RenderingStates.FINISHED;\n        wrapper.appendChild(svg);\n      });\n    });\n\n    return {\n      promise,\n      onRenderContinue(cont) {\n        cont();\n      },\n      cancel() {\n        cancelled = true;\n      },\n    };\n  }\n\n  /**\n   * @param {string|null} label\n   */\n  setPageLabel(label) {\n    this.pageLabel = (typeof label === 'string' ? label : null);\n\n    if (this.pageLabel !== null) {\n      this.div.setAttribute('data-page-label', this.pageLabel);\n    } else {\n      this.div.removeAttribute('data-page-label');\n    }\n  }\n}\n\nexport {\n  PDFPageView,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/pdf_page_view.js","/* 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 { normalizeWheelEventDelta } from './ui_utils';\n\nconst DELAY_BEFORE_RESETTING_SWITCH_IN_PROGRESS = 1500; // in ms\nconst DELAY_BEFORE_HIDING_CONTROLS = 3000; // in ms\nconst ACTIVE_SELECTOR = 'pdfPresentationMode';\nconst CONTROLS_SELECTOR = 'pdfPresentationModeControls';\nconst MOUSE_SCROLL_COOLDOWN_TIME = 50; // in ms\nconst PAGE_SWITCH_THRESHOLD = 0.1;\n\n// Number of CSS pixels for a movement to count as a swipe.\nconst SWIPE_MIN_DISTANCE_THRESHOLD = 50;\n\n// Swipe angle deviation from the x or y axis before it is not\n// considered a swipe in that direction any more.\nconst SWIPE_ANGLE_THRESHOLD = Math.PI / 6;\n\n/**\n * @typedef {Object} PDFPresentationModeOptions\n * @property {HTMLDivElement} container - The container for the viewer element.\n * @property {HTMLDivElement} viewer - (optional) The viewer element.\n * @property {PDFViewer} pdfViewer - The document viewer.\n * @property {EventBus} eventBus - The application event bus.\n * @property {Array} contextMenuItems - (optional) The menuitems that are added\n *   to the context menu in Presentation Mode.\n */\n\nclass PDFPresentationMode {\n  /**\n   * @param {PDFPresentationModeOptions} options\n   */\n  constructor({ container, viewer = null, pdfViewer, eventBus,\n                contextMenuItems = null, }) {\n    this.container = container;\n    this.viewer = viewer || container.firstElementChild;\n    this.pdfViewer = pdfViewer;\n    this.eventBus = eventBus;\n\n    this.active = false;\n    this.args = null;\n    this.contextMenuOpen = false;\n    this.mouseScrollTimeStamp = 0;\n    this.mouseScrollDelta = 0;\n    this.touchSwipeState = null;\n\n    if (contextMenuItems) {\n      contextMenuItems.contextFirstPage.addEventListener('click', () => {\n        this.contextMenuOpen = false;\n        this.eventBus.dispatch('firstpage');\n      });\n      contextMenuItems.contextLastPage.addEventListener('click', () => {\n        this.contextMenuOpen = false;\n        this.eventBus.dispatch('lastpage');\n      });\n      contextMenuItems.contextPageRotateCw.addEventListener('click', () => {\n        this.contextMenuOpen = false;\n        this.eventBus.dispatch('rotatecw');\n      });\n      contextMenuItems.contextPageRotateCcw.addEventListener('click', () => {\n        this.contextMenuOpen = false;\n        this.eventBus.dispatch('rotateccw');\n      });\n    }\n  }\n\n  /**\n   * Request the browser to enter fullscreen mode.\n   * @returns {boolean} Indicating if the request was successful.\n   */\n  request() {\n    if (this.switchInProgress || this.active || !this.viewer.hasChildNodes()) {\n      return false;\n    }\n    this._addFullscreenChangeListeners();\n    this._setSwitchInProgress();\n    this._notifyStateChange();\n\n    if (this.container.requestFullscreen) {\n      this.container.requestFullscreen();\n    } else if (this.container.mozRequestFullScreen) {\n      this.container.mozRequestFullScreen();\n    } else if (this.container.webkitRequestFullscreen) {\n      this.container.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);\n    } else if (this.container.msRequestFullscreen) {\n      this.container.msRequestFullscreen();\n    } else {\n      return false;\n    }\n\n    this.args = {\n      page: this.pdfViewer.currentPageNumber,\n      previousScale: this.pdfViewer.currentScaleValue,\n    };\n\n    return true;\n  }\n\n  /**\n   * @private\n   */\n  _mouseWheel(evt) {\n    if (!this.active) {\n      return;\n    }\n\n    evt.preventDefault();\n\n    let delta = normalizeWheelEventDelta(evt);\n    let currentTime = (new Date()).getTime();\n    let storedTime = this.mouseScrollTimeStamp;\n\n    // If we've already switched page, avoid accidentally switching again.\n    if (currentTime > storedTime &&\n        currentTime - storedTime < MOUSE_SCROLL_COOLDOWN_TIME) {\n      return;\n    }\n    // If the scroll direction changed, reset the accumulated scroll delta.\n    if ((this.mouseScrollDelta > 0 && delta < 0) ||\n        (this.mouseScrollDelta < 0 && delta > 0)) {\n      this._resetMouseScrollState();\n    }\n    this.mouseScrollDelta += delta;\n\n    if (Math.abs(this.mouseScrollDelta) >= PAGE_SWITCH_THRESHOLD) {\n      let totalDelta = this.mouseScrollDelta;\n      this._resetMouseScrollState();\n      let success = totalDelta > 0 ? this._goToPreviousPage()\n                                   : this._goToNextPage();\n      if (success) {\n        this.mouseScrollTimeStamp = currentTime;\n      }\n    }\n  }\n\n  get isFullscreen() {\n    return !!(document.fullscreenElement || document.mozFullScreen ||\n              document.webkitIsFullScreen || document.msFullscreenElement);\n  }\n\n  /**\n   * @private\n   */\n  _goToPreviousPage() {\n    let page = this.pdfViewer.currentPageNumber;\n    // If we're at the first page, we don't need to do anything.\n    if (page <= 1) {\n      return false;\n    }\n    this.pdfViewer.currentPageNumber = (page - 1);\n    return true;\n  }\n\n  /**\n   * @private\n   */\n  _goToNextPage() {\n    let page = this.pdfViewer.currentPageNumber;\n    // If we're at the last page, we don't need to do anything.\n    if (page >= this.pdfViewer.pagesCount) {\n      return false;\n    }\n    this.pdfViewer.currentPageNumber = (page + 1);\n    return true;\n  }\n\n  /**\n   * @private\n   */\n  _notifyStateChange() {\n    this.eventBus.dispatch('presentationmodechanged', {\n      source: this,\n      active: this.active,\n      switchInProgress: !!this.switchInProgress,\n    });\n  }\n\n  /**\n   * Used to initialize a timeout when requesting Presentation Mode,\n   * i.e. when the browser is requested to enter fullscreen mode.\n   * This timeout is used to prevent the current page from being scrolled\n   * partially, or completely, out of view when entering Presentation Mode.\n   * NOTE: This issue seems limited to certain zoom levels (e.g. page-width).\n   *\n   * @private\n   */\n  _setSwitchInProgress() {\n    if (this.switchInProgress) {\n      clearTimeout(this.switchInProgress);\n    }\n    this.switchInProgress = setTimeout(() => {\n      this._removeFullscreenChangeListeners();\n      delete this.switchInProgress;\n      this._notifyStateChange();\n    }, DELAY_BEFORE_RESETTING_SWITCH_IN_PROGRESS);\n  }\n\n  /**\n   * @private\n   */\n  _resetSwitchInProgress() {\n    if (this.switchInProgress) {\n      clearTimeout(this.switchInProgress);\n      delete this.switchInProgress;\n    }\n  }\n\n  /**\n   * @private\n   */\n  _enter() {\n    this.active = true;\n    this._resetSwitchInProgress();\n    this._notifyStateChange();\n    this.container.classList.add(ACTIVE_SELECTOR);\n\n    // Ensure that the correct page is scrolled into view when entering\n    // Presentation Mode, by waiting until fullscreen mode in enabled.\n    setTimeout(() => {\n      this.pdfViewer.currentPageNumber = this.args.page;\n      this.pdfViewer.currentScaleValue = 'page-fit';\n    }, 0);\n\n    this._addWindowListeners();\n    this._showControls();\n    this.contextMenuOpen = false;\n    this.container.setAttribute('contextmenu', 'viewerContextMenu');\n\n    // Text selection is disabled in Presentation Mode, thus it's not possible\n    // for the user to deselect text that is selected (e.g. with \"Select all\")\n    // when entering Presentation Mode, hence we remove any active selection.\n    window.getSelection().removeAllRanges();\n  }\n\n  /**\n   * @private\n   */\n  _exit() {\n    let page = this.pdfViewer.currentPageNumber;\n    this.container.classList.remove(ACTIVE_SELECTOR);\n\n    // Ensure that the correct page is scrolled into view when exiting\n    // Presentation Mode, by waiting until fullscreen mode is disabled.\n    setTimeout(() => {\n      this.active = false;\n      this._removeFullscreenChangeListeners();\n      this._notifyStateChange();\n\n      this.pdfViewer.currentScaleValue = this.args.previousScale;\n      this.pdfViewer.currentPageNumber = page;\n      this.args = null;\n    }, 0);\n\n    this._removeWindowListeners();\n    this._hideControls();\n    this._resetMouseScrollState();\n    this.container.removeAttribute('contextmenu');\n    this.contextMenuOpen = false;\n  }\n\n  /**\n   * @private\n   */\n  _mouseDown(evt) {\n    if (this.contextMenuOpen) {\n      this.contextMenuOpen = false;\n      evt.preventDefault();\n      return;\n    }\n    if (evt.button === 0) {\n      // Enable clicking of links in presentation mode. Note: only links\n      // pointing to destinations in the current PDF document work.\n      let isInternalLink = (evt.target.href &&\n                            evt.target.classList.contains('internalLink'));\n      if (!isInternalLink) {\n        // Unless an internal link was clicked, advance one page.\n        evt.preventDefault();\n\n        if (evt.shiftKey) {\n          this._goToPreviousPage();\n        } else {\n          this._goToNextPage();\n        }\n      }\n    }\n  }\n\n  /**\n   * @private\n   */\n  _contextMenu() {\n    this.contextMenuOpen = true;\n  }\n\n  /**\n   * @private\n   */\n  _showControls() {\n    if (this.controlsTimeout) {\n      clearTimeout(this.controlsTimeout);\n    } else {\n      this.container.classList.add(CONTROLS_SELECTOR);\n    }\n    this.controlsTimeout = setTimeout(() => {\n      this.container.classList.remove(CONTROLS_SELECTOR);\n      delete this.controlsTimeout;\n    }, DELAY_BEFORE_HIDING_CONTROLS);\n  }\n\n  /**\n   * @private\n   */\n  _hideControls() {\n    if (!this.controlsTimeout) {\n      return;\n    }\n    clearTimeout(this.controlsTimeout);\n    this.container.classList.remove(CONTROLS_SELECTOR);\n    delete this.controlsTimeout;\n  }\n\n  /**\n   * Resets the properties used for tracking mouse scrolling events.\n   *\n   * @private\n   */\n  _resetMouseScrollState() {\n    this.mouseScrollTimeStamp = 0;\n    this.mouseScrollDelta = 0;\n  }\n\n  /**\n   * @private\n   */\n  _touchSwipe(evt) {\n    if (!this.active) {\n      return;\n    }\n    if (evt.touches.length > 1) {\n      // Multiple touch points detected; cancel the swipe.\n      this.touchSwipeState = null;\n      return;\n    }\n\n    switch (evt.type) {\n      case 'touchstart':\n        this.touchSwipeState = {\n          startX: evt.touches[0].pageX,\n          startY: evt.touches[0].pageY,\n          endX: evt.touches[0].pageX,\n          endY: evt.touches[0].pageY,\n        };\n        break;\n      case 'touchmove':\n        if (this.touchSwipeState === null) {\n          return;\n        }\n        this.touchSwipeState.endX = evt.touches[0].pageX;\n        this.touchSwipeState.endY = evt.touches[0].pageY;\n        // Avoid the swipe from triggering browser gestures (Chrome in\n        // particular has some sort of swipe gesture in fullscreen mode).\n        evt.preventDefault();\n        break;\n      case 'touchend':\n        if (this.touchSwipeState === null) {\n          return;\n        }\n        let delta = 0;\n        let dx = this.touchSwipeState.endX - this.touchSwipeState.startX;\n        let dy = this.touchSwipeState.endY - this.touchSwipeState.startY;\n        let absAngle = Math.abs(Math.atan2(dy, dx));\n        if (Math.abs(dx) > SWIPE_MIN_DISTANCE_THRESHOLD &&\n            (absAngle <= SWIPE_ANGLE_THRESHOLD ||\n             absAngle >= (Math.PI - SWIPE_ANGLE_THRESHOLD))) {\n          // Horizontal swipe.\n          delta = dx;\n        } else if (Math.abs(dy) > SWIPE_MIN_DISTANCE_THRESHOLD &&\n            Math.abs(absAngle - (Math.PI / 2)) <= SWIPE_ANGLE_THRESHOLD) {\n          // Vertical swipe.\n          delta = dy;\n        }\n        if (delta > 0) {\n          this._goToPreviousPage();\n        } else if (delta < 0) {\n          this._goToNextPage();\n        }\n        break;\n    }\n  }\n\n  /**\n   * @private\n   */\n  _addWindowListeners() {\n    this.showControlsBind = this._showControls.bind(this);\n    this.mouseDownBind = this._mouseDown.bind(this);\n    this.mouseWheelBind = this._mouseWheel.bind(this);\n    this.resetMouseScrollStateBind = this._resetMouseScrollState.bind(this);\n    this.contextMenuBind = this._contextMenu.bind(this);\n    this.touchSwipeBind = this._touchSwipe.bind(this);\n\n    window.addEventListener('mousemove', this.showControlsBind);\n    window.addEventListener('mousedown', this.mouseDownBind);\n    window.addEventListener('wheel', this.mouseWheelBind);\n    window.addEventListener('keydown', this.resetMouseScrollStateBind);\n    window.addEventListener('contextmenu', this.contextMenuBind);\n    window.addEventListener('touchstart', this.touchSwipeBind);\n    window.addEventListener('touchmove', this.touchSwipeBind);\n    window.addEventListener('touchend', this.touchSwipeBind);\n  }\n\n  /**\n   * @private\n   */\n  _removeWindowListeners() {\n    window.removeEventListener('mousemove', this.showControlsBind);\n    window.removeEventListener('mousedown', this.mouseDownBind);\n    window.removeEventListener('wheel', this.mouseWheelBind);\n    window.removeEventListener('keydown', this.resetMouseScrollStateBind);\n    window.removeEventListener('contextmenu', this.contextMenuBind);\n    window.removeEventListener('touchstart', this.touchSwipeBind);\n    window.removeEventListener('touchmove', this.touchSwipeBind);\n    window.removeEventListener('touchend', this.touchSwipeBind);\n\n    delete this.showControlsBind;\n    delete this.mouseDownBind;\n    delete this.mouseWheelBind;\n    delete this.resetMouseScrollStateBind;\n    delete this.contextMenuBind;\n    delete this.touchSwipeBind;\n  }\n\n  /**\n   * @private\n   */\n  _fullscreenChange() {\n    if (this.isFullscreen) {\n      this._enter();\n    } else {\n      this._exit();\n    }\n  }\n\n  /**\n   * @private\n   */\n  _addFullscreenChangeListeners() {\n    this.fullscreenChangeBind = this._fullscreenChange.bind(this);\n\n    window.addEventListener('fullscreenchange', this.fullscreenChangeBind);\n    window.addEventListener('mozfullscreenchange', this.fullscreenChangeBind);\n    if (typeof PDFJSDev === 'undefined' ||\n        !PDFJSDev.test('FIREFOX || MOZCENTRAL')) {\n      window.addEventListener('webkitfullscreenchange',\n                              this.fullscreenChangeBind);\n      window.addEventListener('MSFullscreenChange',\n                              this.fullscreenChangeBind);\n    }\n  }\n\n  /**\n   * @private\n   */\n  _removeFullscreenChangeListeners() {\n    window.removeEventListener('fullscreenchange', this.fullscreenChangeBind);\n    window.removeEventListener('mozfullscreenchange',\n                               this.fullscreenChangeBind);\n    if (typeof PDFJSDev === 'undefined' ||\n        !PDFJSDev.test('FIREFOX || MOZCENTRAL')) {\n      window.removeEventListener('webkitfullscreenchange',\n                                 this.fullscreenChangeBind);\n      window.removeEventListener('MSFullscreenChange',\n                                 this.fullscreenChangeBind);\n    }\n\n    delete this.fullscreenChangeBind;\n  }\n}\n\nexport {\n  PDFPresentationMode,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/pdf_presentation_mode.js","/* Copyright 2016 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 { NullL10n } from './ui_utils';\nimport { RenderingStates } from './pdf_rendering_queue';\n\nconst UI_NOTIFICATION_CLASS = 'pdfSidebarNotification';\n\nconst SidebarView = {\n  NONE: 0,\n  THUMBS: 1,\n  OUTLINE: 2,\n  ATTACHMENTS: 3,\n};\n\n/**\n * @typedef {Object} PDFSidebarOptions\n * @property {PDFViewer} pdfViewer - The document viewer.\n * @property {PDFThumbnailViewer} pdfThumbnailViewer - The thumbnail viewer.\n * @property {PDFOutlineViewer} pdfOutlineViewer - The outline viewer.\n * @property {HTMLDivElement} mainContainer - The main container\n *   (in which the viewer element is placed).\n * @property {HTMLDivElement} outerContainer - The outer container\n *   (encasing both the viewer and sidebar elements).\n * @property {EventBus} eventBus - The application event bus.\n * @property {HTMLButtonElement} toggleButton - The button used for\n *   opening/closing the sidebar.\n * @property {HTMLButtonElement} thumbnailButton - The button used to show\n *   the thumbnail view.\n * @property {HTMLButtonElement} outlineButton - The button used to show\n *   the outline view.\n * @property {HTMLButtonElement} attachmentsButton - The button used to show\n *   the attachments view.\n * @property {HTMLDivElement} thumbnailView - The container in which\n *   the thumbnails are placed.\n * @property {HTMLDivElement} outlineView - The container in which\n *   the outline is placed.\n * @property {HTMLDivElement} attachmentsView - The container in which\n *   the attachments are placed.\n * @property {boolean} disableNotification - (optional) Disable the notification\n *   for documents containing outline/attachments. The default value is `false`.\n */\n\nclass PDFSidebar {\n  /**\n   * @param {PDFSidebarOptions} options\n   * @param {IL10n} l10n - Localization service.\n   */\n  constructor(options, l10n = NullL10n) {\n    this.isOpen = false;\n    this.active = SidebarView.THUMBS;\n    this.isInitialViewSet = false;\n\n    /**\n     * Callback used when the sidebar has been opened/closed, to ensure that\n     * the viewers (PDFViewer/PDFThumbnailViewer) are updated correctly.\n     */\n    this.onToggled = null;\n\n    this.pdfViewer = options.pdfViewer;\n    this.pdfThumbnailViewer = options.pdfThumbnailViewer;\n    this.pdfOutlineViewer = options.pdfOutlineViewer;\n\n    this.mainContainer = options.mainContainer;\n    this.outerContainer = options.outerContainer;\n    this.eventBus = options.eventBus;\n    this.toggleButton = options.toggleButton;\n\n    this.thumbnailButton = options.thumbnailButton;\n    this.outlineButton = options.outlineButton;\n    this.attachmentsButton = options.attachmentsButton;\n\n    this.thumbnailView = options.thumbnailView;\n    this.outlineView = options.outlineView;\n    this.attachmentsView = options.attachmentsView;\n\n    this.disableNotification = options.disableNotification || false;\n\n    this.l10n = l10n;\n\n    this._addEventListeners();\n  }\n\n  reset() {\n    this.isInitialViewSet = false;\n\n    this._hideUINotification(null);\n    this.switchView(SidebarView.THUMBS);\n\n    this.outlineButton.disabled = false;\n    this.attachmentsButton.disabled = false;\n  }\n\n  /**\n   * @returns {number} One of the values in {SidebarView}.\n   */\n  get visibleView() {\n    return (this.isOpen ? this.active : SidebarView.NONE);\n  }\n\n  get isThumbnailViewVisible() {\n    return (this.isOpen && this.active === SidebarView.THUMBS);\n  }\n\n  get isOutlineViewVisible() {\n    return (this.isOpen && this.active === SidebarView.OUTLINE);\n  }\n\n  get isAttachmentsViewVisible() {\n    return (this.isOpen && this.active === SidebarView.ATTACHMENTS);\n  }\n\n  /**\n   * @param {number} view - The sidebar view that should become visible,\n   *                        must be one of the values in {SidebarView}.\n   */\n  setInitialView(view) {\n    if (this.isInitialViewSet) {\n      return;\n    }\n    this.isInitialViewSet = true;\n\n    if (this.isOpen && view === SidebarView.NONE) {\n      this._dispatchEvent();\n      // If the user has already manually opened the sidebar,\n      // immediately closing it would be bad UX.\n      return;\n    }\n    let isViewPreserved = (view === this.visibleView);\n    this.switchView(view, /* forceOpen */ true);\n\n    if (isViewPreserved) {\n      // Prevent dispatching two back-to-back `sidebarviewchanged` events,\n      // since `this.switchView` dispatched the event if the view changed.\n      this._dispatchEvent();\n    }\n  }\n\n  /**\n   * @param {number} view - The sidebar view that should be switched to,\n   *                        must be one of the values in {SidebarView}.\n   * @param {boolean} forceOpen - (optional) Ensure that the sidebar is open.\n   *                              The default value is `false`.\n   */\n  switchView(view, forceOpen = false) {\n    if (view === SidebarView.NONE) {\n      this.close();\n      return;\n    }\n    let isViewChanged = (view !== this.active);\n    let shouldForceRendering = false;\n\n    switch (view) {\n      case SidebarView.THUMBS:\n        this.thumbnailButton.classList.add('toggled');\n        this.outlineButton.classList.remove('toggled');\n        this.attachmentsButton.classList.remove('toggled');\n\n        this.thumbnailView.classList.remove('hidden');\n        this.outlineView.classList.add('hidden');\n        this.attachmentsView.classList.add('hidden');\n\n        if (this.isOpen && isViewChanged) {\n          this._updateThumbnailViewer();\n          shouldForceRendering = true;\n        }\n        break;\n      case SidebarView.OUTLINE:\n        if (this.outlineButton.disabled) {\n          return;\n        }\n        this.thumbnailButton.classList.remove('toggled');\n        this.outlineButton.classList.add('toggled');\n        this.attachmentsButton.classList.remove('toggled');\n\n        this.thumbnailView.classList.add('hidden');\n        this.outlineView.classList.remove('hidden');\n        this.attachmentsView.classList.add('hidden');\n        break;\n      case SidebarView.ATTACHMENTS:\n        if (this.attachmentsButton.disabled) {\n          return;\n        }\n        this.thumbnailButton.classList.remove('toggled');\n        this.outlineButton.classList.remove('toggled');\n        this.attachmentsButton.classList.add('toggled');\n\n        this.thumbnailView.classList.add('hidden');\n        this.outlineView.classList.add('hidden');\n        this.attachmentsView.classList.remove('hidden');\n        break;\n      default:\n        console.error('PDFSidebar_switchView: \"' + view +\n                      '\" is an unsupported value.');\n        return;\n    }\n    // Update the active view *after* it has been validated above,\n    // in order to prevent setting it to an invalid state.\n    this.active = view | 0;\n\n    if (forceOpen && !this.isOpen) {\n      this.open();\n      return; // NOTE: Opening will trigger rendering, and dispatch the event.\n    }\n    if (shouldForceRendering) {\n      this._forceRendering();\n    }\n    if (isViewChanged) {\n      this._dispatchEvent();\n    }\n    this._hideUINotification(this.active);\n  }\n\n  open() {\n    if (this.isOpen) {\n      return;\n    }\n    this.isOpen = true;\n    this.toggleButton.classList.add('toggled');\n\n    this.outerContainer.classList.add('sidebarMoving');\n    this.outerContainer.classList.add('sidebarOpen');\n\n    if (this.active === SidebarView.THUMBS) {\n      this._updateThumbnailViewer();\n    }\n    this._forceRendering();\n    this._dispatchEvent();\n\n    this._hideUINotification(this.active);\n  }\n\n  close() {\n    if (!this.isOpen) {\n      return;\n    }\n    this.isOpen = false;\n    this.toggleButton.classList.remove('toggled');\n\n    this.outerContainer.classList.add('sidebarMoving');\n    this.outerContainer.classList.remove('sidebarOpen');\n\n    this._forceRendering();\n    this._dispatchEvent();\n  }\n\n  toggle() {\n    if (this.isOpen) {\n      this.close();\n    } else {\n      this.open();\n    }\n  }\n\n  /**\n   * @private\n   */\n  _dispatchEvent() {\n    this.eventBus.dispatch('sidebarviewchanged', {\n      source: this,\n      view: this.visibleView,\n    });\n  }\n\n  /**\n   * @private\n   */\n  _forceRendering() {\n    if (this.onToggled) {\n      this.onToggled();\n    } else { // Fallback\n      this.pdfViewer.forceRendering();\n      this.pdfThumbnailViewer.forceRendering();\n    }\n  }\n\n  /**\n   * @private\n   */\n  _updateThumbnailViewer() {\n    let { pdfViewer, pdfThumbnailViewer, } = this;\n\n    // Use the rendered pages to set the corresponding thumbnail images.\n    let pagesCount = pdfViewer.pagesCount;\n    for (let pageIndex = 0; pageIndex < pagesCount; pageIndex++) {\n      let pageView = pdfViewer.getPageView(pageIndex);\n      if (pageView && pageView.renderingState === RenderingStates.FINISHED) {\n        let thumbnailView = pdfThumbnailViewer.getThumbnail(pageIndex);\n        thumbnailView.setImage(pageView);\n      }\n    }\n    pdfThumbnailViewer.scrollThumbnailIntoView(pdfViewer.currentPageNumber);\n  }\n\n  /**\n   * @private\n   */\n  _showUINotification(view) {\n    if (this.disableNotification) {\n      return;\n    }\n\n    this.l10n.get('toggle_sidebar_notification.title', null,\n                  'Toggle Sidebar (document contains outline/attachments)').\n        then((msg) => {\n      this.toggleButton.title = msg;\n    });\n\n    if (!this.isOpen) {\n      // Only show the notification on the `toggleButton` if the sidebar is\n      // currently closed, to avoid unnecessarily bothering the user.\n      this.toggleButton.classList.add(UI_NOTIFICATION_CLASS);\n    } else if (view === this.active) {\n      // If the sidebar is currently open *and* the `view` is visible, do not\n      // bother the user with a notification on the corresponding button.\n      return;\n    }\n\n    switch (view) {\n      case SidebarView.OUTLINE:\n        this.outlineButton.classList.add(UI_NOTIFICATION_CLASS);\n        break;\n      case SidebarView.ATTACHMENTS:\n        this.attachmentsButton.classList.add(UI_NOTIFICATION_CLASS);\n        break;\n    }\n  }\n\n  /**\n   * @private\n   */\n  _hideUINotification(view) {\n    if (this.disableNotification) {\n      return;\n    }\n\n    let removeNotification = (view) => {\n      switch (view) {\n        case SidebarView.OUTLINE:\n          this.outlineButton.classList.remove(UI_NOTIFICATION_CLASS);\n          break;\n        case SidebarView.ATTACHMENTS:\n          this.attachmentsButton.classList.remove(UI_NOTIFICATION_CLASS);\n          break;\n      }\n    };\n\n    if (!this.isOpen && view !== null) {\n      // Only hide the notifications when the sidebar is currently open,\n      // or when it is being reset (i.e. `view === null`).\n      return;\n    }\n    this.toggleButton.classList.remove(UI_NOTIFICATION_CLASS);\n\n    if (view !== null) {\n      removeNotification(view);\n      return;\n    }\n    for (view in SidebarView) { // Remove all sidebar notifications on reset.\n      removeNotification(SidebarView[view]);\n    }\n\n    this.l10n.get('toggle_sidebar.title', null, 'Toggle Sidebar').\n        then((msg) => {\n      this.toggleButton.title = msg;\n    });\n  }\n\n  /**\n   * @private\n   */\n  _addEventListeners() {\n    this.mainContainer.addEventListener('transitionend', (evt) => {\n      if (evt.target === this.mainContainer) {\n        this.outerContainer.classList.remove('sidebarMoving');\n      }\n    });\n\n    // Buttons for switching views.\n    this.thumbnailButton.addEventListener('click', () => {\n      this.switchView(SidebarView.THUMBS);\n    });\n\n    this.outlineButton.addEventListener('click', () => {\n      this.switchView(SidebarView.OUTLINE);\n    });\n    this.outlineButton.addEventListener('dblclick', () => {\n      this.pdfOutlineViewer.toggleOutlineTree();\n    });\n\n    this.attachmentsButton.addEventListener('click', () => {\n      this.switchView(SidebarView.ATTACHMENTS);\n    });\n\n    // Disable/enable views.\n    this.eventBus.on('outlineloaded', (evt) => {\n      let outlineCount = evt.outlineCount;\n\n      this.outlineButton.disabled = !outlineCount;\n\n      if (outlineCount) {\n        this._showUINotification(SidebarView.OUTLINE);\n      } else if (this.active === SidebarView.OUTLINE) {\n        // If the outline view was opened during document load, switch away\n        // from it if it turns out that the document has no outline.\n        this.switchView(SidebarView.THUMBS);\n      }\n    });\n\n    this.eventBus.on('attachmentsloaded', (evt) => {\n      let attachmentsCount = evt.attachmentsCount;\n\n      this.attachmentsButton.disabled = !attachmentsCount;\n\n      if (attachmentsCount) {\n        this._showUINotification(SidebarView.ATTACHMENTS);\n      } else if (this.active === SidebarView.ATTACHMENTS) {\n        // If the attachment view was opened during document load, switch away\n        // from it if it turns out that the document has no attachments.\n        this.switchView(SidebarView.THUMBS);\n      }\n    });\n\n    // Update the thumbnailViewer, if visible, when exiting presentation mode.\n    this.eventBus.on('presentationmodechanged', (evt) => {\n      if (!evt.active && !evt.switchInProgress && this.isThumbnailViewVisible) {\n        this._updateThumbnailViewer();\n      }\n    });\n  }\n}\n\nexport {\n  SidebarView,\n  PDFSidebar,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/pdf_sidebar.js","/* 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  createPromiseCapability, RenderingCancelledException\n} from 'pdfjs-lib';\nimport { getOutputScale, NullL10n } from './ui_utils';\nimport { RenderingStates } from './pdf_rendering_queue';\n\nconst MAX_NUM_SCALING_STEPS = 3;\nconst THUMBNAIL_CANVAS_BORDER_WIDTH = 1; // px\nconst THUMBNAIL_WIDTH = 98; // px\n\n/**\n * @typedef {Object} PDFThumbnailViewOptions\n * @property {HTMLDivElement} container - The viewer element.\n * @property {number} id - The thumbnail's unique ID (normally its number).\n * @property {PageViewport} defaultViewport - The page viewport.\n * @property {IPDFLinkService} linkService - The navigation/linking service.\n * @property {PDFRenderingQueue} renderingQueue - The rendering queue object.\n * @property {boolean} disableCanvasToImageConversion - (optional) Don't convert\n *   the canvas thumbnails to images. This prevents `toDataURL` calls,\n *   but increases the overall memory usage. The default value is `false`.\n * @property {IL10n} l10n - Localization service.\n */\n\nconst TempImageFactory = (function TempImageFactoryClosure() {\n  let tempCanvasCache = null;\n\n  return {\n    getCanvas(width, height) {\n      let tempCanvas = tempCanvasCache;\n      if (!tempCanvas) {\n        tempCanvas = document.createElement('canvas');\n        tempCanvasCache = tempCanvas;\n      }\n      tempCanvas.width = width;\n      tempCanvas.height = height;\n\n      // Since this is a temporary canvas, we need to fill it with a white\n      // background ourselves. `_getPageDrawContext` uses CSS rules for this.\n      if (typeof PDFJSDev === 'undefined' ||\n          PDFJSDev.test('MOZCENTRAL || FIREFOX || GENERIC')) {\n        tempCanvas.mozOpaque = true;\n      }\n\n      let ctx = tempCanvas.getContext('2d', { alpha: false, });\n      ctx.save();\n      ctx.fillStyle = 'rgb(255, 255, 255)';\n      ctx.fillRect(0, 0, width, height);\n      ctx.restore();\n      return tempCanvas;\n    },\n\n    destroyCanvas() {\n      let tempCanvas = tempCanvasCache;\n      if (tempCanvas) {\n        // Zeroing the width and height causes Firefox to release graphics\n        // resources immediately, which can greatly reduce memory consumption.\n        tempCanvas.width = 0;\n        tempCanvas.height = 0;\n      }\n      tempCanvasCache = null;\n    },\n  };\n})();\n\n/**\n * @implements {IRenderableView}\n */\nclass PDFThumbnailView {\n  /**\n   * @param {PDFThumbnailViewOptions} options\n   */\n  constructor({ container, id, defaultViewport, linkService, renderingQueue,\n                disableCanvasToImageConversion = false, l10n = NullL10n, }) {\n    this.id = id;\n    this.renderingId = 'thumbnail' + id;\n    this.pageLabel = null;\n\n    this.pdfPage = null;\n    this.rotation = 0;\n    this.viewport = defaultViewport;\n    this.pdfPageRotate = defaultViewport.rotation;\n\n    this.linkService = linkService;\n    this.renderingQueue = renderingQueue;\n\n    this.renderTask = null;\n    this.renderingState = RenderingStates.INITIAL;\n    this.resume = null;\n    this.disableCanvasToImageConversion = disableCanvasToImageConversion;\n\n    this.pageWidth = this.viewport.width;\n    this.pageHeight = this.viewport.height;\n    this.pageRatio = this.pageWidth / this.pageHeight;\n\n    this.canvasWidth = THUMBNAIL_WIDTH;\n    this.canvasHeight = (this.canvasWidth / this.pageRatio) | 0;\n    this.scale = this.canvasWidth / this.pageWidth;\n\n    this.l10n = l10n;\n\n    let anchor = document.createElement('a');\n    anchor.href = linkService.getAnchorUrl('#page=' + id);\n    this.l10n.get('thumb_page_title', { page: id, }, 'Page {{page}}').\n        then((msg) => {\n      anchor.title = msg;\n    });\n    anchor.onclick = function() {\n      linkService.page = id;\n      return false;\n    };\n    this.anchor = anchor;\n\n    let div = document.createElement('div');\n    div.className = 'thumbnail';\n    div.setAttribute('data-page-number', this.id);\n    this.div = div;\n\n    if (id === 1) {\n      // Highlight the thumbnail of the first page when no page number is\n      // specified (or exists in cache) when the document is loaded.\n      div.classList.add('selected');\n    }\n\n    let ring = document.createElement('div');\n    ring.className = 'thumbnailSelectionRing';\n    let borderAdjustment = 2 * THUMBNAIL_CANVAS_BORDER_WIDTH;\n    ring.style.width = this.canvasWidth + borderAdjustment + 'px';\n    ring.style.height = this.canvasHeight + borderAdjustment + 'px';\n    this.ring = ring;\n\n    div.appendChild(ring);\n    anchor.appendChild(div);\n    container.appendChild(anchor);\n  }\n\n  setPdfPage(pdfPage) {\n    this.pdfPage = pdfPage;\n    this.pdfPageRotate = pdfPage.rotate;\n    let totalRotation = (this.rotation + this.pdfPageRotate) % 360;\n    this.viewport = pdfPage.getViewport(1, totalRotation);\n    this.reset();\n  }\n\n  reset() {\n    this.cancelRendering();\n\n    this.pageWidth = this.viewport.width;\n    this.pageHeight = this.viewport.height;\n    this.pageRatio = this.pageWidth / this.pageHeight;\n\n    this.canvasHeight = (this.canvasWidth / this.pageRatio) | 0;\n    this.scale = (this.canvasWidth / this.pageWidth);\n\n    this.div.removeAttribute('data-loaded');\n    let ring = this.ring;\n    let childNodes = ring.childNodes;\n    for (let i = childNodes.length - 1; i >= 0; i--) {\n      ring.removeChild(childNodes[i]);\n    }\n    let borderAdjustment = 2 * THUMBNAIL_CANVAS_BORDER_WIDTH;\n    ring.style.width = this.canvasWidth + borderAdjustment + 'px';\n    ring.style.height = this.canvasHeight + borderAdjustment + 'px';\n\n    if (this.canvas) {\n      // Zeroing the width and height causes Firefox to release graphics\n      // resources immediately, which can greatly reduce memory consumption.\n      this.canvas.width = 0;\n      this.canvas.height = 0;\n      delete this.canvas;\n    }\n    if (this.image) {\n      this.image.removeAttribute('src');\n      delete this.image;\n    }\n  }\n\n  update(rotation) {\n    if (typeof rotation !== 'undefined') {\n      this.rotation = rotation;\n    }\n    let totalRotation = (this.rotation + this.pdfPageRotate) % 360;\n    this.viewport = this.viewport.clone({\n      scale: 1,\n      rotation: totalRotation,\n    });\n    this.reset();\n  }\n\n  cancelRendering() {\n    if (this.renderTask) {\n      this.renderTask.cancel();\n      this.renderTask = null;\n    }\n    this.renderingState = RenderingStates.INITIAL;\n    this.resume = null;\n  }\n\n  /**\n   * @private\n   */\n  _getPageDrawContext(noCtxScale = false) {\n    let canvas = document.createElement('canvas');\n    // Keep the no-thumbnail outline visible, i.e. `data-loaded === false`,\n    // until rendering/image conversion is complete, to avoid display issues.\n    this.canvas = canvas;\n\n    if (typeof PDFJSDev === 'undefined' ||\n        PDFJSDev.test('MOZCENTRAL || FIREFOX || GENERIC')) {\n      canvas.mozOpaque = true;\n    }\n    let ctx = canvas.getContext('2d', { alpha: false, });\n    let outputScale = getOutputScale(ctx);\n\n    canvas.width = (this.canvasWidth * outputScale.sx) | 0;\n    canvas.height = (this.canvasHeight * outputScale.sy) | 0;\n    canvas.style.width = this.canvasWidth + 'px';\n    canvas.style.height = this.canvasHeight + 'px';\n\n    if (!noCtxScale && outputScale.scaled) {\n      ctx.scale(outputScale.sx, outputScale.sy);\n    }\n    return ctx;\n  }\n\n  /**\n   * @private\n   */\n  _convertCanvasToImage() {\n    if (!this.canvas) {\n      return;\n    }\n    if (this.renderingState !== RenderingStates.FINISHED) {\n      return;\n    }\n    let id = this.renderingId;\n    let className = 'thumbnailImage';\n\n    if (this.disableCanvasToImageConversion) {\n      this.canvas.id = id;\n      this.canvas.className = className;\n      this.l10n.get('thumb_page_canvas', { page: this.pageId, },\n                    'Thumbnail of Page {{page}}').then((msg) => {\n        this.canvas.setAttribute('aria-label', msg);\n      });\n\n      this.div.setAttribute('data-loaded', true);\n      this.ring.appendChild(this.canvas);\n      return;\n    }\n    let image = document.createElement('img');\n    image.id = id;\n    image.className = className;\n    this.l10n.get('thumb_page_canvas', { page: this.pageId, },\n      'Thumbnail of Page {{page}}').\n        then((msg) => {\n      image.setAttribute('aria-label', msg);\n    });\n\n    image.style.width = this.canvasWidth + 'px';\n    image.style.height = this.canvasHeight + 'px';\n\n    image.src = this.canvas.toDataURL();\n    this.image = image;\n\n    this.div.setAttribute('data-loaded', true);\n    this.ring.appendChild(image);\n\n    // Zeroing the width and height causes Firefox to release graphics\n    // resources immediately, which can greatly reduce memory consumption.\n    this.canvas.width = 0;\n    this.canvas.height = 0;\n    delete this.canvas;\n  }\n\n  draw() {\n    if (this.renderingState !== RenderingStates.INITIAL) {\n      console.error('Must be in new state before drawing');\n      return Promise.resolve(undefined);\n    }\n    this.renderingState = RenderingStates.RUNNING;\n\n    let renderCapability = createPromiseCapability();\n    let finishRenderTask = (error) => {\n      // The renderTask may have been replaced by a new one, so only remove\n      // the reference to the renderTask if it matches the one that is\n      // triggering this callback.\n      if (renderTask === this.renderTask) {\n        this.renderTask = null;\n      }\n\n      if (((typeof PDFJSDev === 'undefined' ||\n            !PDFJSDev.test('PDFJS_NEXT')) && error === 'cancelled') ||\n          error instanceof RenderingCancelledException) {\n        renderCapability.resolve(undefined);\n        return;\n      }\n\n      this.renderingState = RenderingStates.FINISHED;\n      this._convertCanvasToImage();\n\n      if (!error) {\n        renderCapability.resolve(undefined);\n      } else {\n        renderCapability.reject(error);\n      }\n    };\n\n    let ctx = this._getPageDrawContext();\n    let drawViewport = this.viewport.clone({ scale: this.scale, });\n    let renderContinueCallback = (cont) => {\n      if (!this.renderingQueue.isHighestPriority(this)) {\n        this.renderingState = RenderingStates.PAUSED;\n        this.resume = () => {\n          this.renderingState = RenderingStates.RUNNING;\n          cont();\n        };\n        return;\n      }\n      cont();\n    };\n\n    let renderContext = {\n      canvasContext: ctx,\n      viewport: drawViewport,\n    };\n    let renderTask = this.renderTask = this.pdfPage.render(renderContext);\n    renderTask.onContinue = renderContinueCallback;\n\n    renderTask.promise.then(function() {\n      finishRenderTask(null);\n    }, function(error) {\n      finishRenderTask(error);\n    });\n    return renderCapability.promise;\n  }\n\n  setImage(pageView) {\n    if (this.renderingState !== RenderingStates.INITIAL) {\n      return;\n    }\n    let img = pageView.canvas;\n    if (!img) {\n      return;\n    }\n    if (!this.pdfPage) {\n      this.setPdfPage(pageView.pdfPage);\n    }\n\n    this.renderingState = RenderingStates.FINISHED;\n\n    let ctx = this._getPageDrawContext(true);\n    let canvas = ctx.canvas;\n    if (img.width <= 2 * canvas.width) {\n      ctx.drawImage(img, 0, 0, img.width, img.height,\n                    0, 0, canvas.width, canvas.height);\n      this._convertCanvasToImage();\n      return;\n    }\n\n    // drawImage does an awful job of rescaling the image, doing it gradually.\n    let reducedWidth = canvas.width << MAX_NUM_SCALING_STEPS;\n    let reducedHeight = canvas.height << MAX_NUM_SCALING_STEPS;\n    let reducedImage = TempImageFactory.getCanvas(reducedWidth,\n                                                  reducedHeight);\n    let reducedImageCtx = reducedImage.getContext('2d');\n\n    while (reducedWidth > img.width || reducedHeight > img.height) {\n      reducedWidth >>= 1;\n      reducedHeight >>= 1;\n    }\n    reducedImageCtx.drawImage(img, 0, 0, img.width, img.height,\n                              0, 0, reducedWidth, reducedHeight);\n    while (reducedWidth > 2 * canvas.width) {\n      reducedImageCtx.drawImage(reducedImage,\n                                0, 0, reducedWidth, reducedHeight,\n                                0, 0, reducedWidth >> 1, reducedHeight >> 1);\n      reducedWidth >>= 1;\n      reducedHeight >>= 1;\n    }\n    ctx.drawImage(reducedImage, 0, 0, reducedWidth, reducedHeight,\n                  0, 0, canvas.width, canvas.height);\n    this._convertCanvasToImage();\n  }\n\n  get pageId() {\n    return (this.pageLabel !== null ? this.pageLabel : this.id);\n  }\n\n  /**\n   * @param {string|null} label\n   */\n  setPageLabel(label) {\n    this.pageLabel = (typeof label === 'string' ? label : null);\n\n    this.l10n.get('thumb_page_title', { page: this.pageId, },\n                  'Page {{page}}').then((msg) => {\n      this.anchor.title = msg;\n    });\n\n    if (this.renderingState !== RenderingStates.FINISHED) {\n      return;\n    }\n\n    this.l10n.get('thumb_page_canvas', { page: this.pageId, },\n                  'Thumbnail of Page {{page}}').then((ariaLabel) => {\n      if (this.image) {\n        this.image.setAttribute('aria-label', ariaLabel);\n      } else if (this.disableCanvasToImageConversion && this.canvas) {\n        this.canvas.setAttribute('aria-label', ariaLabel);\n      }\n    });\n  }\n\n  static cleanup() {\n    TempImageFactory.destroyCanvas();\n  }\n}\n\nexport {\n  PDFThumbnailView,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/pdf_thumbnail_view.js","/* 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  getVisibleElements, NullL10n, scrollIntoView, watchScroll\n} from './ui_utils';\nimport { PDFThumbnailView } from './pdf_thumbnail_view';\n\nconst THUMBNAIL_SCROLL_MARGIN = -19;\n\n/**\n * @typedef {Object} PDFThumbnailViewerOptions\n * @property {HTMLDivElement} container - The container for the thumbnail\n *   elements.\n * @property {IPDFLinkService} linkService - The navigation/linking service.\n * @property {PDFRenderingQueue} renderingQueue - The rendering queue object.\n * @property {IL10n} l10n - Localization service.\n */\n\n/**\n * Viewer control to display thumbnails for pages in a PDF document.\n *\n * @implements {IRenderableView}\n */\nclass PDFThumbnailViewer {\n  /**\n   * @param {PDFThumbnailViewerOptions} options\n   */\n  constructor({ container, linkService, renderingQueue, l10n = NullL10n, }) {\n    this.container = container;\n    this.linkService = linkService;\n    this.renderingQueue = renderingQueue;\n    this.l10n = l10n;\n\n    this.scroll = watchScroll(this.container, this._scrollUpdated.bind(this));\n    this._resetView();\n  }\n\n  /**\n   * @private\n   */\n  _scrollUpdated() {\n    this.renderingQueue.renderHighestPriority();\n  }\n\n  getThumbnail(index) {\n    return this._thumbnails[index];\n  }\n\n  /**\n   * @private\n   */\n  _getVisibleThumbs() {\n    return getVisibleElements(this.container, this._thumbnails);\n  }\n\n  scrollThumbnailIntoView(page) {\n    let selected = document.querySelector('.thumbnail.selected');\n    if (selected) {\n      selected.classList.remove('selected');\n    }\n    let thumbnail = document.querySelector(\n      'div.thumbnail[data-page-number=\"' + page + '\"]');\n    if (thumbnail) {\n      thumbnail.classList.add('selected');\n    }\n    let visibleThumbs = this._getVisibleThumbs();\n    let numVisibleThumbs = visibleThumbs.views.length;\n\n    // If the thumbnail isn't currently visible, scroll it into view.\n    if (numVisibleThumbs > 0) {\n      let first = visibleThumbs.first.id;\n      // Account for only one thumbnail being visible.\n      let last = (numVisibleThumbs > 1 ? visibleThumbs.last.id : first);\n      if (page <= first || page >= last) {\n        scrollIntoView(thumbnail, { top: THUMBNAIL_SCROLL_MARGIN, });\n      }\n    }\n  }\n\n  get pagesRotation() {\n    return this._pagesRotation;\n  }\n\n  set pagesRotation(rotation) {\n    if (!(typeof rotation === 'number' && rotation % 90 === 0)) {\n      throw new Error('Invalid thumbnails rotation angle.');\n    }\n    if (!this.pdfDocument) {\n      return;\n    }\n    this._pagesRotation = rotation;\n\n    for (let i = 0, ii = this._thumbnails.length; i < ii; i++) {\n      this._thumbnails[i].update(rotation);\n    }\n  }\n\n  cleanup() {\n    PDFThumbnailView.cleanup();\n  }\n\n  /**\n   * @private\n   */\n  _resetView() {\n    this._thumbnails = [];\n    this._pageLabels = null;\n    this._pagesRotation = 0;\n    this._pagesRequests = [];\n\n    // Remove the thumbnails from the DOM.\n    this.container.textContent = '';\n  }\n\n  setDocument(pdfDocument) {\n    if (this.pdfDocument) {\n      this._cancelRendering();\n      this._resetView();\n    }\n\n    this.pdfDocument = pdfDocument;\n    if (!pdfDocument) {\n      return;\n    }\n\n    pdfDocument.getPage(1).then((firstPage) => {\n      let pagesCount = pdfDocument.numPages;\n      let viewport = firstPage.getViewport(1.0);\n      for (let pageNum = 1; pageNum <= pagesCount; ++pageNum) {\n        let thumbnail = new PDFThumbnailView({\n          container: this.container,\n          id: pageNum,\n          defaultViewport: viewport.clone(),\n          linkService: this.linkService,\n          renderingQueue: this.renderingQueue,\n          disableCanvasToImageConversion: false,\n          l10n: this.l10n,\n        });\n        this._thumbnails.push(thumbnail);\n      }\n    }).catch((reason) => {\n      console.error('Unable to initialize thumbnail viewer', reason);\n    });\n  }\n\n  /**\n   * @private\n   */\n  _cancelRendering() {\n    for (let i = 0, ii = this._thumbnails.length; i < ii; i++) {\n      if (this._thumbnails[i]) {\n        this._thumbnails[i].cancelRendering();\n      }\n    }\n  }\n\n  /**\n   * @param {Array|null} labels\n   */\n  setPageLabels(labels) {\n    if (!this.pdfDocument) {\n      return;\n    }\n    if (!labels) {\n      this._pageLabels = null;\n    } else if (!(labels instanceof Array &&\n                 this.pdfDocument.numPages === labels.length)) {\n      this._pageLabels = null;\n      console.error('PDFThumbnailViewer_setPageLabels: Invalid page labels.');\n    } else {\n      this._pageLabels = labels;\n    }\n    // Update all the `PDFThumbnailView` instances.\n    for (let i = 0, ii = this._thumbnails.length; i < ii; i++) {\n      let label = this._pageLabels && this._pageLabels[i];\n      this._thumbnails[i].setPageLabel(label);\n    }\n  }\n\n  /**\n   * @param {PDFThumbnailView} thumbView\n   * @returns {PDFPage}\n   * @private\n   */\n  _ensurePdfPageLoaded(thumbView) {\n    if (thumbView.pdfPage) {\n      return Promise.resolve(thumbView.pdfPage);\n    }\n    let pageNumber = thumbView.id;\n    if (this._pagesRequests[pageNumber]) {\n      return this._pagesRequests[pageNumber];\n    }\n    let promise = this.pdfDocument.getPage(pageNumber).then((pdfPage) => {\n      thumbView.setPdfPage(pdfPage);\n      this._pagesRequests[pageNumber] = null;\n      return pdfPage;\n    }).catch((reason) => {\n      console.error('Unable to get page for thumb view', reason);\n      // Page error -- there is nothing can be done.\n      this._pagesRequests[pageNumber] = null;\n    });\n    this._pagesRequests[pageNumber] = promise;\n    return promise;\n  }\n\n  forceRendering() {\n    let visibleThumbs = this._getVisibleThumbs();\n    let thumbView = this.renderingQueue.getHighestPriority(visibleThumbs,\n                                                           this._thumbnails,\n                                                           this.scroll.down);\n    if (thumbView) {\n      this._ensurePdfPageLoaded(thumbView).then(() => {\n        this.renderingQueue.renderView(thumbView);\n      });\n      return true;\n    }\n    return false;\n  }\n}\n\nexport {\n  PDFThumbnailViewer,\n};\n\n\n\n// WEBPACK FOOTER //\n// web/pdf_thumbnail_viewer.js","/* 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 { createPromiseCapability, PDFJS } from 'pdfjs-lib';\nimport {\n  CSS_UNITS, DEFAULT_SCALE, DEFAULT_SCALE_VALUE, getVisibleElements,\n  MAX_AUTO_SCALE, NullL10n, RendererType, SCROLLBAR_PADDING, scrollIntoView,\n  UNKNOWN_SCALE, VERTICAL_PADDING, watchScroll\n} from './ui_utils';\nimport { PDFRenderingQueue, RenderingStates } from './pdf_rendering_queue';\nimport { AnnotationLayerBuilder } from './annotation_layer_builder';\nimport { getGlobalEventBus } from './dom_events';\nimport { PDFPageView } from './pdf_page_view';\nimport { SimpleLinkService } from './pdf_link_service';\nimport { TextLayerBuilder } from './text_layer_builder';\n\nconst PresentationModeState = {\n  UNKNOWN: 0,\n  NORMAL: 1,\n  CHANGING: 2,\n  FULLSCREEN: 3,\n};\n\nconst DEFAULT_CACHE_SIZE = 10;\n\n/**\n * @typedef {Object} PDFViewerOptions\n * @property {HTMLDivElement} container - The container for the viewer element.\n * @property {HTMLDivElement} viewer - (optional) The viewer element.\n * @property {EventBus} eventBus - The application event bus.\n * @property {IPDFLinkService} linkService - The navigation/linking service.\n * @property {DownloadManager} downloadManager - (optional) The download\n *   manager component.\n * @property {PDFRenderingQueue} renderingQueue - (optional) The rendering\n *   queue object.\n * @property {boolean} removePageBorders - (optional) Removes the border shadow\n *   around the pages. The default is false.\n * @property {boolean} enhanceTextSelection - (optional) Enables the improved\n *   text selection behaviour. The default is `false`.\n * @property {boolean} renderInteractiveForms - (optional) Enables rendering of\n *   interactive form elements. The default is `false`.\n * @property {boolean} enablePrintAutoRotate - (optional) Enables automatic\n *   rotation of pages whose orientation differ from the first page upon\n *   printing. The default is `false`.\n * @property {string} renderer - 'canvas' or 'svg'. The default is 'canvas'.\n * @property {IL10n} l10n - Localization service.\n */\n\nfunction PDFPageViewBuffer(size) {\n  let data = [];\n  this.push = function cachePush(view) {\n    let i = data.indexOf(view);\n    if (i >= 0) {\n      data.splice(i, 1);\n    }\n    data.push(view);\n    if (data.length > size) {\n      data.shift().destroy();\n    }\n  };\n  this.resize = function (newSize) {\n    size = newSize;\n    while (data.length > size) {\n      data.shift().destroy();\n    }\n  };\n}\n\nfunction isSameScale(oldScale, newScale) {\n  if (newScale === oldScale) {\n    return true;\n  }\n  if (Math.abs(newScale - oldScale) < 1e-15) {\n    // Prevent unnecessary re-rendering of all pages when the scale\n    // changes only because of limited numerical precision.\n    return true;\n  }\n  return false;\n}\n\nfunction isPortraitOrientation(size) {\n  return size.width <= size.height;\n}\n\n/**\n * Simple viewer control to display PDF content/pages.\n * @implements {IRenderableView}\n */\nclass PDFViewer {\n  /**\n   * @param {PDFViewerOptions} options\n   */\n  constructor(options) {\n    this.container = options.container;\n    this.viewer = options.viewer || options.container.firstElementChild;\n    this.eventBus = options.eventBus || getGlobalEventBus();\n    this.linkService = options.linkService || new SimpleLinkService();\n    this.downloadManager = options.downloadManager || null;\n    this.removePageBorders = options.removePageBorders || false;\n    this.enhanceTextSelection = options.enhanceTextSelection || false;\n    this.renderInteractiveForms = options.renderInteractiveForms || false;\n    this.enablePrintAutoRotate = options.enablePrintAutoRotate || false;\n    this.renderer = options.renderer || RendererType.CANVAS;\n    this.l10n = options.l10n || NullL10n;\n\n    this.defaultRenderingQueue = !options.renderingQueue;\n    if (this.defaultRenderingQueue) {\n      // Custom rendering queue is not specified, using default one\n      this.renderingQueue = new PDFRenderingQueue();\n      this.renderingQueue.setViewer(this);\n    } else {\n      this.renderingQueue = options.renderingQueue;\n    }\n\n    this.scroll = watchScroll(this.container, this._scrollUpdate.bind(this));\n    this.presentationModeState = PresentationModeState.UNKNOWN;\n    this._resetView();\n\n    if (this.removePageBorders) {\n      this.viewer.classList.add('removePageBorders');\n    }\n  }\n\n  get pagesCount() {\n    return this._pages.length;\n  }\n\n  getPageView(index) {\n    return this._pages[index];\n  }\n\n  /**\n   * @returns {boolean} true if all {PDFPageView} objects are initialized.\n   */\n  get pageViewsReady() {\n    return this._pageViewsReady;\n  }\n\n  /**\n   * @returns {number}\n   */\n  get currentPageNumber() {\n    return this._currentPageNumber;\n  }\n\n  /**\n   * @param {number} val - The page number.\n   */\n  set currentPageNumber(val) {\n    if ((val | 0) !== val) { // Ensure that `val` is an integer.\n      throw new Error('Invalid page number.');\n    }\n    if (!this.pdfDocument) {\n      return;\n    }\n    // The intent can be to just reset a scroll position and/or scale.\n    this._setCurrentPageNumber(val, /* resetCurrentPageView = */ true);\n  }\n\n  /**\n   * @private\n   */\n  _setCurrentPageNumber(val, resetCurrentPageView = false) {\n    if (this._currentPageNumber === val) {\n      if (resetCurrentPageView) {\n        this._resetCurrentPageView();\n      }\n      return;\n    }\n\n    if (!(0 < val && val <= this.pagesCount)) {\n      console.error(\n        `PDFViewer._setCurrentPageNumber: \"${val}\" is out of bounds.`);\n      return;\n    }\n\n    let arg = {\n      source: this,\n      pageNumber: val,\n      pageLabel: this._pageLabels && this._pageLabels[val - 1],\n    };\n    this._currentPageNumber = val;\n    this.eventBus.dispatch('pagechanging', arg);\n    this.eventBus.dispatch('pagechange', arg);\n\n    if (resetCurrentPageView) {\n      this._resetCurrentPageView();\n    }\n  }\n\n  /**\n   * @returns {string|null} Returns the current page label,\n   *                        or `null` if no page labels exist.\n   */\n  get currentPageLabel() {\n    return this._pageLabels && this._pageLabels[this._currentPageNumber - 1];\n  }\n\n  /**\n   * @param {string} val - The page label.\n   */\n  set currentPageLabel(val) {\n    let pageNumber = val | 0; // Fallback page number.\n    if (this._pageLabels) {\n      let i = this._pageLabels.indexOf(val);\n      if (i >= 0) {\n        pageNumber = i + 1;\n      }\n    }\n    this.currentPageNumber = pageNumber;\n  }\n\n  /**\n   * @returns {number}\n   */\n  get currentScale() {\n    return this._currentScale !== UNKNOWN_SCALE ? this._currentScale :\n                                                  DEFAULT_SCALE;\n  }\n\n  /**\n   * @param {number} val - Scale of the pages in percents.\n   */\n  set currentScale(val) {\n    if (isNaN(val)) {\n      throw new Error('Invalid numeric scale');\n    }\n    if (!this.pdfDocument) {\n      return;\n    }\n    this._setScale(val, false);\n  }\n\n  /**\n   * @returns {string}\n   */\n  get currentScaleValue() {\n    return this._currentScaleValue;\n  }\n\n  /**\n   * @param val - The scale of the pages (in percent or predefined value).\n   */\n  set currentScaleValue(val) {\n    if (!this.pdfDocument) {\n      return;\n    }\n    this._setScale(val, false);\n  }\n\n  /**\n   * @returns {number}\n   */\n  get pagesRotation() {\n    return this._pagesRotation;\n  }\n\n  /**\n   * @param {number} rotation - The rotation of the pages (0, 90, 180, 270).\n   */\n  set pagesRotation(rotation) {\n    if (!(typeof rotation === 'number' && rotation % 90 === 0)) {\n      throw new Error('Invalid pages rotation angle.');\n    }\n    if (!this.pdfDocument) {\n      return;\n    }\n    this._pagesRotation = rotation;\n\n    for (let i = 0, ii = this._pages.length; i < ii; i++) {\n      let pageView = this._pages[i];\n      pageView.update(pageView.scale, rotation);\n    }\n\n    this._setScale(this._currentScaleValue, true);\n\n    if (this.defaultRenderingQueue) {\n      this.update();\n    }\n  }\n\n  /**\n   * @param pdfDocument {PDFDocument}\n   */\n  setDocument(pdfDocument) {\n    if (this.pdfDocument) {\n      this._cancelRendering();\n      this._resetView();\n    }\n\n    this.pdfDocument = pdfDocument;\n    if (!pdfDocument) {\n      return;\n    }\n    let pagesCount = pdfDocument.numPages;\n\n    let pagesCapability = createPromiseCapability();\n    this.pagesPromise = pagesCapability.promise;\n\n    pagesCapability.promise.then(() => {\n      this._pageViewsReady = true;\n      this.eventBus.dispatch('pagesloaded', {\n        source: this,\n        pagesCount,\n      });\n    });\n\n    let isOnePageRenderedResolved = false;\n    let onePageRenderedCapability = createPromiseCapability();\n    this.onePageRendered = onePageRenderedCapability.promise;\n\n    let bindOnAfterAndBeforeDraw = (pageView) => {\n      pageView.onBeforeDraw = () => {\n        // Add the page to the buffer at the start of drawing. That way it can\n        // be evicted from the buffer and destroyed even if we pause its\n        // rendering.\n        this._buffer.push(pageView);\n      };\n      pageView.onAfterDraw = () => {\n        if (!isOnePageRenderedResolved) {\n          isOnePageRenderedResolved = true;\n          onePageRenderedCapability.resolve();\n        }\n      };\n    };\n\n    let firstPagePromise = pdfDocument.getPage(1);\n    this.firstPagePromise = firstPagePromise;\n\n    // Fetch a single page so we can get a viewport that will be the default\n    // viewport for all pages\n    firstPagePromise.then((pdfPage) => {\n      let scale = this.currentScale;\n      let viewport = pdfPage.getViewport(scale * CSS_UNITS);\n      for (let pageNum = 1; pageNum <= pagesCount; ++pageNum) {\n        let textLayerFactory = null;\n        if (!PDFJS.disableTextLayer) {\n          textLayerFactory = this;\n        }\n        let pageView = new PDFPageView({\n          container: this.viewer,\n          eventBus: this.eventBus,\n          id: pageNum,\n          scale,\n          defaultViewport: viewport.clone(),\n          renderingQueue: this.renderingQueue,\n          textLayerFactory,\n          annotationLayerFactory: this,\n          enhanceTextSelection: this.enhanceTextSelection,\n          renderInteractiveForms: this.renderInteractiveForms,\n          renderer: this.renderer,\n          l10n: this.l10n,\n        });\n        bindOnAfterAndBeforeDraw(pageView);\n        this._pages.push(pageView);\n      }\n\n      // Fetch all the pages since the viewport is needed before printing\n      // starts to create the correct size canvas. Wait until one page is\n      // rendered so we don't tie up too many resources early on.\n      onePageRenderedCapability.promise.then(() => {\n        if (PDFJS.disableAutoFetch) {\n          // XXX: Printing is semi-broken with auto fetch disabled.\n          pagesCapability.resolve();\n          return;\n        }\n        let getPagesLeft = pagesCount;\n        for (let pageNum = 1; pageNum <= pagesCount; ++pageNum) {\n          pdfDocument.getPage(pageNum).then((pdfPage) => {\n            let pageView = this._pages[pageNum - 1];\n            if (!pageView.pdfPage) {\n              pageView.setPdfPage(pdfPage);\n            }\n            this.linkService.cachePageRef(pageNum, pdfPage.ref);\n            if (--getPagesLeft === 0) {\n              pagesCapability.resolve();\n            }\n          }, (reason) => {\n            console.error(`Unable to get page ${pageNum} to initialize viewer`,\n                          reason);\n            if (--getPagesLeft === 0) {\n              pagesCapability.resolve();\n            }\n          });\n        }\n      });\n\n      this.eventBus.dispatch('pagesinit', { source: this, });\n\n      if (this.defaultRenderingQueue) {\n        this.update();\n      }\n\n      if (this.findController) {\n        this.findController.resolveFirstPage();\n      }\n    }).catch((reason) => {\n      console.error('Unable to initialize viewer', reason);\n    });\n  }\n\n  /**\n   * @param {Array|null} labels\n   */\n  setPageLabels(labels) {\n    if (!this.pdfDocument) {\n      return;\n    }\n    if (!labels) {\n      this._pageLabels = null;\n    } else if (!(labels instanceof Array &&\n                 this.pdfDocument.numPages === labels.length)) {\n      this._pageLabels = null;\n      console.error('PDFViewer.setPageLabels: Invalid page labels.');\n    } else {\n      this._pageLabels = labels;\n    }\n    // Update all the `PDFPageView` instances.\n    for (let i = 0, ii = this._pages.length; i < ii; i++) {\n      let pageView = this._pages[i];\n      let label = this._pageLabels && this._pageLabels[i];\n      pageView.setPageLabel(label);\n    }\n  }\n\n  _resetView() {\n    this._pages = [];\n    this._currentPageNumber = 1;\n    this._currentScale = UNKNOWN_SCALE;\n    this._currentScaleValue = null;\n    this._pageLabels = null;\n    this._buffer = new PDFPageViewBuffer(DEFAULT_CACHE_SIZE);\n    this._location = null;\n    this._pagesRotation = 0;\n    this._pagesRequests = [];\n    this._pageViewsReady = false;\n\n    // Remove the pages from the DOM.\n    this.viewer.textContent = '';\n  }\n\n  _scrollUpdate() {\n    if (this.pagesCount === 0) {\n      return;\n    }\n    this.update();\n  }\n\n  _setScaleDispatchEvent(newScale, newValue, preset = false) {\n    let arg = {\n      source: this,\n      scale: newScale,\n      presetValue: preset ? newValue : undefined,\n    };\n    this.eventBus.dispatch('scalechanging', arg);\n    this.eventBus.dispatch('scalechange', arg);\n  }\n\n  _setScaleUpdatePages(newScale, newValue, noScroll = false, preset = false) {\n    this._currentScaleValue = newValue.toString();\n\n    if (isSameScale(this._currentScale, newScale)) {\n      if (preset) {\n        this._setScaleDispatchEvent(newScale, newValue, true);\n      }\n      return;\n    }\n\n    for (let i = 0, ii = this._pages.length; i < ii; i++) {\n      this._pages[i].update(newScale);\n    }\n    this._currentScale = newScale;\n\n    if (!noScroll) {\n      let page = this._currentPageNumber, dest;\n      if (this._location && !PDFJS.ignoreCurrentPositionOnZoom &&\n          !(this.isInPresentationMode || this.isChangingPresentationMode)) {\n        page = this._location.pageNumber;\n        dest = [null, { name: 'XYZ', }, this._location.left,\n                this._location.top, null];\n      }\n      this.scrollPageIntoView({\n        pageNumber: page,\n        destArray: dest,\n        allowNegativeOffset: true,\n      });\n    }\n\n    this._setScaleDispatchEvent(newScale, newValue, preset);\n\n    if (this.defaultRenderingQueue) {\n      this.update();\n    }\n  }\n\n  _setScale(value, noScroll = false) {\n    let scale = parseFloat(value);\n\n    if (scale > 0) {\n      this._setScaleUpdatePages(scale, value, noScroll, /* preset = */ false);\n    } else {\n      let currentPage = this._pages[this._currentPageNumber - 1];\n      if (!currentPage) {\n        return;\n      }\n      let hPadding = (this.isInPresentationMode || this.removePageBorders) ?\n        0 : SCROLLBAR_PADDING;\n      let vPadding = (this.isInPresentationMode || this.removePageBorders) ?\n        0 : VERTICAL_PADDING;\n      let pageWidthScale = (this.container.clientWidth - hPadding) /\n                           currentPage.width * currentPage.scale;\n      let pageHeightScale = (this.container.clientHeight - vPadding) /\n                            currentPage.height * currentPage.scale;\n      switch (value) {\n        case 'page-actual':\n          scale = 1;\n          break;\n        case 'page-width':\n          scale = pageWidthScale;\n          break;\n        case 'page-height':\n          scale = pageHeightScale;\n          break;\n        case 'page-fit':\n          scale = Math.min(pageWidthScale, pageHeightScale);\n          break;\n        case 'auto':\n          let isLandscape = (currentPage.width > currentPage.height);\n          // For pages in landscape mode, fit the page height to the viewer\n          // *unless* the page would thus become too wide to fit horizontally.\n          let horizontalScale = isLandscape ?\n            Math.min(pageHeightScale, pageWidthScale) : pageWidthScale;\n          scale = Math.min(MAX_AUTO_SCALE, horizontalScale);\n          break;\n        default:\n          console.error(\n            `PDFViewer._setScale: \"${value}\" is an unknown zoom value.`);\n          return;\n      }\n      this._setScaleUpdatePages(scale, value, noScroll, /* preset = */ true);\n    }\n  }\n\n  /**\n   * Refreshes page view: scrolls to the current page and updates the scale.\n   * @private\n   */\n  _resetCurrentPageView() {\n    if (this.isInPresentationMode) {\n      // Fixes the case when PDF has different page sizes.\n      this._setScale(this._currentScaleValue, true);\n    }\n\n    let pageView = this._pages[this._currentPageNumber - 1];\n    scrollIntoView(pageView.div);\n  }\n\n  /**\n   * @typedef ScrollPageIntoViewParameters\n   * @property {number} pageNumber - The page number.\n   * @property {Array} destArray - (optional) The original PDF destination\n   *   array, in the format: <page-ref> </XYZ|/FitXXX> <args..>\n   * @property {boolean} allowNegativeOffset - (optional) Allow negative page\n   *   offsets. The default value is `false`.\n   */\n\n  /**\n   * Scrolls page into view.\n   * @param {ScrollPageIntoViewParameters} params\n   */\n  scrollPageIntoView(params) {\n    if (!this.pdfDocument) {\n      return;\n    }\n    if ((typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) &&\n        (arguments.length > 1 || typeof params === 'number')) {\n      console.warn('Call of scrollPageIntoView() with obsolete signature.');\n      let paramObj = {};\n      if (typeof params === 'number') {\n        paramObj.pageNumber = params; // pageNumber argument was found.\n      }\n      if (arguments[1] instanceof Array) {\n        paramObj.destArray = arguments[1]; // destArray argument was found.\n      }\n      params = paramObj;\n    }\n    let pageNumber = params.pageNumber || 0;\n    let dest = params.destArray || null;\n    let allowNegativeOffset = params.allowNegativeOffset || false;\n\n    if (this.isInPresentationMode || !dest) {\n      this._setCurrentPageNumber(pageNumber, /* resetCurrentPageView = */ true);\n      return;\n    }\n\n    let pageView = this._pages[pageNumber - 1];\n    if (!pageView) {\n      console.error(\n        'PDFViewer.scrollPageIntoView: Invalid \"pageNumber\" parameter.');\n      return;\n    }\n    let x = 0, y = 0;\n    let width = 0, height = 0, widthScale, heightScale;\n    let changeOrientation = (pageView.rotation % 180 === 0 ? false : true);\n    let pageWidth = (changeOrientation ? pageView.height : pageView.width) /\n      pageView.scale / CSS_UNITS;\n    let pageHeight = (changeOrientation ? pageView.width : pageView.height) /\n      pageView.scale / CSS_UNITS;\n    let scale = 0;\n    switch (dest[1].name) {\n      case 'XYZ':\n        x = dest[2];\n        y = dest[3];\n        scale = dest[4];\n        // If x and/or y coordinates are not supplied, default to\n        // _top_ left of the page (not the obvious bottom left,\n        // since aligning the bottom of the intended page with the\n        // top of the window is rarely helpful).\n        x = x !== null ? x : 0;\n        y = y !== null ? y : pageHeight;\n        break;\n      case 'Fit':\n      case 'FitB':\n        scale = 'page-fit';\n        break;\n      case 'FitH':\n      case 'FitBH':\n        y = dest[2];\n        scale = 'page-width';\n        // According to the PDF spec, section 12.3.2.2, a `null` value in the\n        // parameter should maintain the position relative to the new page.\n        if (y === null && this._location) {\n          x = this._location.left;\n          y = this._location.top;\n        }\n        break;\n      case 'FitV':\n      case 'FitBV':\n        x = dest[2];\n        width = pageWidth;\n        height = pageHeight;\n        scale = 'page-height';\n        break;\n      case 'FitR':\n        x = dest[2];\n        y = dest[3];\n        width = dest[4] - x;\n        height = dest[5] - y;\n        let hPadding = this.removePageBorders ? 0 : SCROLLBAR_PADDING;\n        let vPadding = this.removePageBorders ? 0 : VERTICAL_PADDING;\n\n        widthScale = (this.container.clientWidth - hPadding) /\n          width / CSS_UNITS;\n        heightScale = (this.container.clientHeight - vPadding) /\n          height / CSS_UNITS;\n        scale = Math.min(Math.abs(widthScale), Math.abs(heightScale));\n        break;\n      default:\n        console.error(`PDFViewer.scrollPageIntoView: \"${dest[1].name}\" ` +\n                      'is not a valid destination type.');\n        return;\n    }\n\n    if (scale && scale !== this._currentScale) {\n      this.currentScaleValue = scale;\n    } else if (this._currentScale === UNKNOWN_SCALE) {\n      this.currentScaleValue = DEFAULT_SCALE_VALUE;\n    }\n\n    if (scale === 'page-fit' && !dest[4]) {\n      scrollIntoView(pageView.div);\n      return;\n    }\n\n    let boundingRect = [\n      pageView.viewport.convertToViewportPoint(x, y),\n      pageView.viewport.convertToViewportPoint(x + width, y + height)\n    ];\n    let left = Math.min(boundingRect[0][0], boundingRect[1][0]);\n    let top = Math.min(boundingRect[0][1], boundingRect[1][1]);\n\n    if (!allowNegativeOffset) {\n      // Some bad PDF generators will create destinations with e.g. top values\n      // that exceeds the page height. Ensure that offsets are not negative,\n      // to prevent a previous page from becoming visible (fixes bug 874482).\n      left = Math.max(left, 0);\n      top = Math.max(top, 0);\n    }\n    scrollIntoView(pageView.div, { left, top, });\n  }\n\n  _updateLocation(firstPage) {\n    let currentScale = this._currentScale;\n    let currentScaleValue = this._currentScaleValue;\n    let normalizedScaleValue =\n      parseFloat(currentScaleValue) === currentScale ?\n      Math.round(currentScale * 10000) / 100 : currentScaleValue;\n\n    let pageNumber = firstPage.id;\n    let pdfOpenParams = '#page=' + pageNumber;\n    pdfOpenParams += '&zoom=' + normalizedScaleValue;\n    let currentPageView = this._pages[pageNumber - 1];\n    let container = this.container;\n    let topLeft = currentPageView.getPagePoint(\n      (container.scrollLeft - firstPage.x),\n      (container.scrollTop - firstPage.y));\n    let intLeft = Math.round(topLeft[0]);\n    let intTop = Math.round(topLeft[1]);\n    pdfOpenParams += ',' + intLeft + ',' + intTop;\n\n    this._location = {\n      pageNumber,\n      scale: normalizedScaleValue,\n      top: intTop,\n      left: intLeft,\n      pdfOpenParams,\n    };\n  }\n\n  update() {\n    let visible = this._getVisiblePages();\n    let visiblePages = visible.views;\n    if (visiblePages.length === 0) {\n      return;\n    }\n\n    let suggestedCacheSize = Math.max(DEFAULT_CACHE_SIZE,\n                                      2 * visiblePages.length + 1);\n    this._buffer.resize(suggestedCacheSize);\n\n    this.renderingQueue.renderHighestPriority(visible);\n\n    let currentId = this._currentPageNumber;\n    let firstPage = visible.first;\n    let stillFullyVisible = false;\n\n    for (let i = 0, ii = visiblePages.length; i < ii; ++i) {\n      let page = visiblePages[i];\n\n      if (page.percent < 100) {\n        break;\n      }\n      if (page.id === currentId) {\n        stillFullyVisible = true;\n        break;\n      }\n    }\n\n    if (!stillFullyVisible) {\n      currentId = visiblePages[0].id;\n    }\n\n    if (!this.isInPresentationMode) {\n      this._setCurrentPageNumber(currentId);\n    }\n\n    this._updateLocation(firstPage);\n\n    this.eventBus.dispatch('updateviewarea', {\n      source: this,\n      location: this._location,\n    });\n  }\n\n  containsElement(element) {\n    return this.container.contains(element);\n  }\n\n  focus() {\n    this.container.focus();\n  }\n\n  get isInPresentationMode() {\n    return this.presentationModeState === PresentationModeState.FULLSCREEN;\n  }\n\n  get isChangingPresentationMode() {\n    return this.presentationModeState === PresentationModeState.CHANGING;\n  }\n\n  get isHorizontalScrollbarEnabled() {\n    return (this.isInPresentationMode ?\n      false : (this.container.scrollWidth > this.container.clientWidth));\n  }\n\n  _getVisiblePages() {\n    if (!this.isInPresentationMode) {\n      return getVisibleElements(this.container, this._pages, true);\n    }\n    // The algorithm in getVisibleElements doesn't work in all browsers and\n    // configurations when presentation mode is active.\n    let visible = [];\n    let currentPage = this._pages[this._currentPageNumber - 1];\n    visible.push({ id: currentPage.id, view: currentPage, });\n    return { first: currentPage, last: currentPage, views: visible, };\n  }\n\n  cleanup() {\n    for (let i = 0, ii = this._pages.length; i < ii; i++) {\n      if (this._pages[i] &&\n          this._pages[i].renderingState !== RenderingStates.FINISHED) {\n        this._pages[i].reset();\n      }\n    }\n  }\n\n  /**\n   * @private\n   */\n  _cancelRendering() {\n    for (let i = 0, ii = this._pages.length; i < ii; i++) {\n      if (this._pages[i]) {\n        this._pages[i].cancelRendering();\n      }\n    }\n  }\n\n  /**\n   * @param {PDFPageView} pageView\n   * @returns {Promise} Returns a promise containing a {PDFPageProxy} object.\n   * @private\n   */\n  _ensurePdfPageLoaded(pageView) {\n    if (pageView.pdfPage) {\n      return Promise.resolve(pageView.pdfPage);\n    }\n    let pageNumber = pageView.id;\n    if (this._pagesRequests[pageNumber]) {\n      return this._pagesRequests[pageNumber];\n    }\n    let promise = this.pdfDocument.getPage(pageNumber).then((pdfPage) => {\n      if (!pageView.pdfPage) {\n        pageView.setPdfPage(pdfPage);\n      }\n      this._pagesRequests[pageNumber] = null;\n      return pdfPage;\n    }).catch((reason) => {\n      console.error('Unable to get page for page view', reason);\n      // Page error -- there is nothing can be done.\n      this._pagesRequests[pageNumber] = null;\n    });\n    this._pagesRequests[pageNumber] = promise;\n    return promise;\n  }\n\n  forceRendering(currentlyVisiblePages) {\n    let visiblePages = currentlyVisiblePages || this._getVisiblePages();\n    let pageView = this.renderingQueue.getHighestPriority(visiblePages,\n                                                          this._pages,\n                                                          this.scroll.down);\n    if (pageView) {\n      this._ensurePdfPageLoaded(pageView).then(() => {\n        this.renderingQueue.renderView(pageView);\n      });\n      return true;\n    }\n    return false;\n  }\n\n  getPageTextContent(pageIndex) {\n    return this.pdfDocument.getPage(pageIndex + 1).then(function(page) {\n      return page.getTextContent({\n        normalizeWhitespace: true,\n      });\n    });\n  }\n\n  /**\n   * @param {HTMLDivElement} textLayerDiv\n   * @param {number} pageIndex\n   * @param {PageViewport} viewport\n   * @returns {TextLayerBuilder}\n   */\n  createTextLayerBuilder(textLayerDiv, pageIndex, viewport,\n                         enhanceTextSelection = false) {\n    return new TextLayerBuilder({\n      textLayerDiv,\n      eventBus: this.eventBus,\n      pageIndex,\n      viewport,\n      findController: this.isInPresentationMode ? null : this.findController,\n      enhanceTextSelection: this.isInPresentationMode ? false :\n                                                        enhanceTextSelection,\n    });\n  }\n\n  /**\n   * @param {HTMLDivElement} pageDiv\n   * @param {PDFPage} pdfPage\n   * @param {boolean} renderInteractiveForms\n   * @param {IL10n} l10n\n   * @returns {AnnotationLayerBuilder}\n   */\n  createAnnotationLayerBuilder(pageDiv, pdfPage, renderInteractiveForms = false,\n                               l10n = NullL10n) {\n    return new AnnotationLayerBuilder({\n      pageDiv,\n      pdfPage,\n      renderInteractiveForms,\n      linkService: this.linkService,\n      downloadManager: this.downloadManager,\n      l10n,\n    });\n  }\n\n  setFindController(findController) {\n    this.findController = findController;\n  }\n\n  /**\n   * @returns {boolean} Whether all pages of the PDF document have identical\n   *                    widths and heights.\n   */\n  get hasEqualPageSizes() {\n    let firstPageView = this._pages[0];\n    for (let i = 1, ii = this._pages.length; i < ii; ++i) {\n      let pageView = this._pages[i];\n      if (pageView.width !== firstPageView.width ||\n          pageView.height !== firstPageView.height) {\n        return false;\n      }\n    }\n    return true;\n  }\n\n  /**\n   * Returns sizes of the pages.\n   * @returns {Array} Array of objects with width/height/rot