/* Copyright 2014 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
(function (root, factory) {
'use strict';
if (typeof define === 'function' && define.amd) {
define('pdfjs-dist/web/pdf_viewer', [
'exports',
'pdfjs-dist/build/pdf'
], factory);
} else if (typeof exports !== 'undefined') {
factory(exports, require('../build/pdf.js'));
} else {
factory(root.pdfjsDistWebPDFViewer = {}, root.pdfjsDistBuildPdf);
}
}(this, function (exports, pdfjsLib) {
'use strict';
var pdfViewerLibs = { pdfjsWebPDFJS: pdfjsLib };
(function () {
(function (root, factory) {
factory(root.pdfjsWebPDFRenderingQueue = {});
}(this, function (exports) {
var CLEANUP_TIMEOUT = 30000;
var RenderingStates = {
INITIAL: 0,
RUNNING: 1,
PAUSED: 2,
FINISHED: 3
};
/**
* Controls rendering of the views for pages and thumbnails.
* @class
*/
var PDFRenderingQueue = function PDFRenderingQueueClosure() {
/**
* @constructs
*/
function PDFRenderingQueue() {
this.pdfViewer = null;
this.pdfThumbnailViewer = null;
this.onIdle = null;
this.highestPriorityPage = null;
this.idleTimeout = null;
this.printing = false;
this.isThumbnailViewEnabled = false;
}
PDFRenderingQueue.prototype = /** @lends PDFRenderingQueue.prototype */
{
/**
* @param {PDFViewer} pdfViewer
*/
setViewer: function PDFRenderingQueue_setViewer(pdfViewer) {
this.pdfViewer = pdfViewer;
},
/**
* @param {PDFThumbnailViewer} pdfThumbnailViewer
*/
setThumbnailViewer: function PDFRenderingQueue_setThumbnailViewer(pdfThumbnailViewer) {
this.pdfThumbnailViewer = pdfThumbnailViewer;
},
/**
* @param {IRenderableView} view
* @returns {boolean}
*/
isHighestPriority: function PDFRenderingQueue_isHighestPriority(view) {
return this.highestPriorityPage === view.renderingId;
},
renderHighestPriority: function PDFRenderingQueue_renderHighestPriority(currentlyVisiblePages) {
if (this.idleTimeout) {
clearTimeout(this.idleTimeout);
this.idleTimeout = null;
}
// Pages have a higher priority than thumbnails, so check them first.
if (this.pdfViewer.forceRendering(currentlyVisiblePages)) {
return;
}
// No pages needed rendering so check thumbnails.
if (this.pdfThumbnailViewer && this.isThumbnailViewEnabled) {
if (this.pdfThumbnailViewer.forceRendering()) {
return;
}
}
if (this.printing) {
// If printing is currently ongoing do not reschedule cleanup.
return;
}
if (this.onIdle) {
this.idleTimeout = setTimeout(this.onIdle.bind(this), CLEANUP_TIMEOUT);
}
},
getHighestPriority: function PDFRenderingQueue_getHighestPriority(visible, views, scrolledDown) {
// The state has changed figure out which page has the highest priority to
// render next (if any).
// Priority:
// 1 visible pages
// 2 if last scrolled down page after the visible pages
// 2 if last scrolled up page before the visible pages
var visibleViews = visible.views;
var numVisible = visibleViews.length;
if (numVisible === 0) {
return false;
}
for (var i = 0; i < numVisible; ++i) {
var view = visibleViews[i].view;
if (!this.isViewFinished(view)) {
return view;
}
}
// All the visible views have rendered, try to render next/previous pages.
if (scrolledDown) {
var nextPageIndex = visible.last.id;
// ID's start at 1 so no need to add 1.
if (views[nextPageIndex] && !this.isViewFinished(views[nextPageIndex])) {
return views[nextPageIndex];
}
} else {
var previousPageIndex = visible.first.id - 2;
if (views[previousPageIndex] && !this.isViewFinished(views[previousPageIndex])) {
return views[previousPageIndex];
}
}
// Everything that needs to be rendered has been.
return null;
},
/**
* @param {IRenderableView} view
* @returns {boolean}
*/
isViewFinished: function PDFRenderingQueue_isViewFinished(view) {
return view.renderingState === RenderingStates.FINISHED;
},
/**
* Render a page or thumbnail view. This calls the appropriate function
* based on the views state. If the view is already rendered it will return
* false.
* @param {IRenderableView} view
*/
renderView: function PDFRenderingQueue_renderView(view) {
var state = view.renderingState;
switch (state) {
case RenderingStates.FINISHED:
return false;
case RenderingStates.PAUSED:
this.highestPriorityPage = view.renderingId;
view.resume();
break;
case RenderingStates.RUNNING:
this.highestPriorityPage = view.renderingId;
break;
case RenderingStates.INITIAL:
this.highestPriorityPage = view.renderingId;
var continueRendering = function () {
this.renderHighestPriority();
}.bind(this);
view.draw().then(continueRendering, continueRendering);
break;
}
return true;
}
};
return PDFRenderingQueue;
}();
exports.RenderingStates = RenderingStates;
exports.PDFRenderingQueue = PDFRenderingQueue;
}));
(function (root, factory) {
factory(root.pdfjsWebDownloadManager = {}, root.pdfjsWebPDFJS);
}(this, function (exports, pdfjsLib) {
function download(blobUrl, filename) {
var a = document.createElement('a');
if (a.click) {
// Use a.click() if available. Otherwise, Chrome might show
// "Unsafe JavaScript attempt to initiate a navigation change
// for frame with URL" and not open the PDF at all.
// Supported by (not mentioned = untested):
// - Firefox 6 - 19 (4- does not support a.click, 5 ignores a.click)
// - Chrome 19 - 26 (18- does not support a.click)
// - Opera 9 - 12.15
// - Internet Explorer 6 - 10
// - Safari 6 (5.1- does not support a.click)
a.href = blobUrl;
a.target = '_parent';
// Use a.download if available. This increases the likelihood that
// the file is downloaded instead of opened by another PDF plugin.
if ('download' in a) {
a.download = filename;
}
// <a> must be in the document for IE and recent Firefox versions.
// (otherwise .click() is ignored)
(document.body || document.documentElement).appendChild(a);
a.click();
a.parentNode.removeChild(a);
} else {
if (window.top === window && blobUrl.split('#')[0] === window.location.href.split('#')[0]) {
// If _parent == self, then opening an identical URL with different
// location hash will only cause a navigation, not a download.
var padCharacter = blobUrl.indexOf('?') === -1 ? '?' : '&';
blobUrl = blobUrl.replace(/#|$/, padCharacter + '$&');
}
window.open(blobUrl, '_parent');
}
}
function DownloadManager() {
}
DownloadManager.prototype = {
downloadUrl: function DownloadManager_downloadUrl(url, filename) {
if (!pdfjsLib.createValidAbsoluteUrl(url, 'http://example.com')) {
return;
}
// restricted/invalid URL
download(url + '#pdfjs.action=download', filename);
},
downloadData: function DownloadManager_downloadData(data, filename, contentType) {
if (navigator.msSaveBlob) {
// IE10 and above
return navigator.msSaveBlob(new Blob([data], { type: contentType }), filename);
}
var blobUrl = pdfjsLib.createObjectURL(data, contentType, pdfjsLib.PDFJS.disableCreateObjectURL);
download(blobUrl, filename);
},
download: function DownloadManager_download(blob, url, filename) {
if (!URL) {
// URL.createObjectURL is not supported
this.downloadUrl(url, filename);
return;
}
if (navigator.msSaveBlob) {
// IE10 / IE11
if (!navigator.msSaveBlob(blob, filename)) {
this.downloadUrl(url, filename);
}
return;
}
var blobUrl = URL.createObjectURL(blob);
download(blobUrl, filename);
}
};
exports.DownloadManager = DownloadManager;
}));
(function (root, factory) {
factory(root.pdfjsWebUIUtils = {}, root.pdfjsWebPDFJS);
}(this, function (exports, pdfjsLib) {
var CSS_UNITS = 96.0 / 72.0;
var DEFAULT_SCALE_VALUE = 'auto';
var DEFAULT_SCALE = 1.0;
var UNKNOWN_SCALE = 0;
var MAX_AUTO_SCALE = 1.25;
var SCROLLBAR_PADDING = 40;
var VERTICAL_PADDING = 5;
var mozL10n = document.mozL10n || document.webL10n;
var PDFJS = pdfjsLib.PDFJS;
/**
* Disables fullscreen support, and by extension Presentation Mode,
* in browsers which support the fullscreen API.
* @var {boolean}
*/
PDFJS.disableFullscreen = PDFJS.disableFullscreen === undefined ? false : PDFJS.disableFullscreen;
/**
* Enables CSS only zooming.
* @var {boolean}
*/
PDFJS.useOnlyCssZoom = PDFJS.useOnlyCssZoom === undefined ? false : PDFJS.useOnlyCssZoom;
/**
* The maximum supported canvas size in total pixels e.g. width * height.
* The default value is 4096 * 4096. Use -1 for no limit.
* @var {number}
*/
PDFJS.maxCanvasPixels = PDFJS.maxCanvasPixels === undefined ? 16777216 : PDFJS.maxCanvasPixels;
/**
* Disables saving of the last position of the viewed PDF.
* @var {boolean}
*/
PDFJS.disableHistory = PDFJS.disableHistory === undefined ? false : PDFJS.disableHistory;
/**
* Disables creation of the text layer that used for text selection and search.
* @var {boolean}
*/
PDFJS.disableTextLayer = PDFJS.disableTextLayer === undefined ? false : PDFJS.disableTextLayer;
/**
* Disables maintaining the current position in the document when zooming.
*/
PDFJS.ignoreCurrentPositionOnZoom = PDFJS.ignoreCurrentPositionOnZoom === undefined ? false : PDFJS.ignoreCurrentPositionOnZoom;
/**
* Interface locale settings.
* @var {string}
*/
PDFJS.locale = PDFJS.locale === undefined ? navigator.language : PDFJS.locale;
/**
* Returns scale factor for the canvas. It makes sense for the HiDPI displays.
* @return {Object} The object with horizontal (sx) and vertical (sy)
scales. The scaled property is set to false if scaling is
not required, true otherwise.
*/
function getOutputScale(ctx) {
var devicePixelRatio = window.devicePixelRatio || 1;
var backingStoreRatio = ctx.webkitBackingStorePixelRatio || ctx.mozBackingStorePixelRatio || ctx.msBackingStorePixelRatio || ctx.oBackingStorePixelRatio || ctx.backingStorePixelRatio || 1;
var pixelRatio = devicePixelRatio / backingStoreRatio;
return {
sx: pixelRatio,
sy: pixelRatio,
scaled: pixelRatio !== 1
};
}
/**
* Scrolls specified element into view of its parent.
* @param {Object} element - The element to be visible.
* @param {Object} spot - An object with optional top and left properties,
* specifying the offset from the top left edge.
* @param {boolean} skipOverflowHiddenElements - Ignore elements that have
* the CSS rule `overflow: hidden;` set. The default is false.
*/
function scrollIntoView(element, spot, skipOverflowHiddenElements) {
// Assuming offsetParent is available (it's not available when viewer is in
// hidden iframe or object). We have to scroll: if the offsetParent is not set
// producing the error. See also animationStartedClosure.
var parent = element.offsetParent;
if (!parent) {
console.error('offsetParent is not set -- cannot scroll');
return;
}
var checkOverflow = skipOverflowHiddenElements || false;
var offsetY = element.offsetTop + element.clientTop;
var offsetX = element.offsetLeft + element.clientLeft;
while (parent.clientHeight === parent.scrollHeight || checkOverflow && getComputedStyle(parent).overflow === 'hidden') {
if (parent.dataset._scaleY) {
offsetY /= parent.dataset._scaleY;
offsetX /= parent.dataset._scaleX;
}
offsetY += parent.offsetTop;
offsetX += parent.offsetLeft;
parent = parent.offsetParent;
if (!parent) {
return;
}
}
// no need to scroll
if (spot) {
if (spot.top !== undefined) {
offsetY += spot.top;
}
if (spot.left !== undefined) {
offsetX += spot.left;
parent.scrollLeft = offsetX;
}
}
parent.scrollTop = offsetY;
}
/**
* Helper function to start monitoring the scroll event and converting them into
* PDF.js friendly one: with scroll debounce and scroll direction.
*/
function watchScroll(viewAreaElement, callback) {
var debounceScroll = function debounceScroll(evt) {
if (rAF) {
return;
}
// schedule an invocation of scroll for next animation frame.
rAF = window.requestAnimationFrame(function viewAreaElementScrolled() {
rAF = null;
var currentY = viewAreaElement.scrollTop;
var lastY = state.lastY;
if (currentY !== lastY) {
state.down = currentY > lastY;
}
state.lastY = currentY;
callback(state);
});
};
var state = {
down: true,
lastY: viewAreaElement.scrollTop,
_eventHandler: debounceScroll
};
var rAF = null;
viewAreaElement.addEventListener('scroll', debounceScroll, true);
return state;
}
/**
* Helper function to parse query string (e.g. ?param1=value&parm2=...).
*/
function parseQueryString(query) {
var parts = query.split('&');
var params = {};
for (var i = 0, ii = parts.length; i < ii; ++i) {
var param = parts[i].split('=');
var key = param[0].toLowerCase();
var value = param.length > 1 ? param[1] : null;
params[decodeURIComponent(key)] = decodeURIComponent(value);
}
return params;
}
/**
* Use binary search to find the index of the first item in a given array which
* passes a given condition. The items are expected to be sorted in the sense
* that if the condition is true for one item in the array, then it is also true
* for all following items.
*
* @returns {Number} Index of the first array element to pass the test,
* or |items.length| if no such element exists.
*/
function binarySearchFirstItem(items, condition) {
var minIndex = 0;
var maxIndex = items.length - 1;
if (items.length === 0 || !condition(items[maxIndex])) {
return items.length;
}
if (condition(items[minIndex])) {
return minIndex;
}
while (minIndex < maxIndex) {
var currentIndex = minIndex + maxIndex >> 1;
var currentItem = items[currentIndex];
if (condition(currentItem)) {
maxIndex = currentIndex;
} else {
minIndex = currentIndex + 1;
}
}
return minIndex;
}
/* === maxIndex */
/**
* Approximates float number as a fraction using Farey sequence (max order
* of 8).
* @param {number} x - Positive float number.
* @returns {Array} Estimated fraction: the first array item is a numerator,
* the second one is a denominator.
*/
function approximateFraction(x) {
// Fast paths for int numbers or their inversions.
if (Math.floor(x) === x) {
return [
x,
1
];
}
var xinv = 1 / x;
var limit = 8;
if (xinv > limit) {
return [
1,
limit
];
} else if (Math.floor(xinv) === xinv) {
return [
1,
xinv
];
}
var x_ = x > 1 ? xinv : x;
// a/b and c/d are neighbours in Farey sequence.
var a = 0, b = 1, c = 1, d = 1;
// Limiting search to order 8.
while (true) {
// Generating next term in sequence (order of q).
var p = a + c, q = b + d;
if (q > limit) {
break;
}
if (x_ <= p / q) {
c = p;
d = q;
} else {
a = p;
b = q;
}
}
// Select closest of the neighbours to x.
if (x_ - a / b < c / d - x_) {
return x_ === x ? [
a,
b
] : [
b,
a
];
} else {
return x_ === x ? [
c,
d
] : [
d,
c
];
}
}
function roundToDivide(x, div) {
var r = x % div;
return r === 0 ? x : Math.round(x - r + div);
}
/**
* Generic helper to find out what elements are visible within a scroll pane.
*/
function getVisibleElements(scrollEl, views, sortByVisibility) {
var top = scrollEl.scrollTop, bottom = top + scrollEl.clientHeight;
var left = scrollEl.scrollLeft, right = left + scrollEl.clientWidth;
function isElementBottomBelowViewTop(view) {
var element = view.div;
var elementBottom = element.offsetTop + element.clientTop + element.clientHeight;
return elementBottom > top;
}
var visible = [], view, element;
var currentHeight, viewHeight, hiddenHeight, percentHeight;
var currentWidth, viewWidth;
var firstVisibleElementInd = views.length === 0 ? 0 : binarySearchFirstItem(views, isElementBottomBelowViewTop);
for (var i = firstVisibleElementInd, ii = views.length; i < ii; i++) {
view = views[i];
element = view.div;
currentHeight = element.offsetTop + element.clientTop;
viewHeight = element.clientHeight;
if (currentHeight > bottom) {
break;
}
currentWidth = element.offsetLeft + element.clientLeft;
viewWidth = element.clientWidth;
if (currentWidth + viewWidth < left || currentWidth > right) {
continue;
}
hiddenHeight = Math.max(0, top - currentHeight) + Math.max(0, currentHeight + viewHeight - bottom);
percentHeight = (viewHeight - hiddenHeight) * 100 / viewHeight | 0;
visible.push({
id: view.id,
x: currentWidth,
y: currentHeight,
view: view,
percent: percentHeight
});
}
var first = visible[0];
var last = visible[visible.length - 1];
if (sortByVisibility) {
visible.sort(function (a, b) {
var pc = a.percent - b.percent;
if (Math.abs(pc) > 0.001) {
return -pc;
}
return a.id - b.id;
});
}
// ensure stability
return {
first: first,
last: last,
views: visible
};
}
/**
* Event handler to suppress context menu.
*/
function noContextMenuHandler(e) {
e.preventDefault();
}
/**
* Returns the filename or guessed filename from the url (see issue 3455).
* url {String} The original PDF location.
* @return {String} Guessed PDF file name.
*/
function getPDFFileNameFromURL(url) {
var reURI = /^(?:([^:]+:)?\/\/[^\/]+)?([^?#]*)(\?[^#]*)?(#.*)?$/;
// SCHEME HOST 1.PATH 2.QUERY 3.REF
// Pattern to get last matching NAME.pdf
var reFilename = /[^\/?#=]+\.pdf\b(?!.*\.pdf\b)/i;
var splitURI = reURI.exec(url);
var suggestedFilename = reFilename.exec(splitURI[1]) || reFilename.exec(splitURI[2]) || reFilename.exec(splitURI[3]);
if (suggestedFilename) {
suggestedFilename = suggestedFilename[0];
if (suggestedFilename.indexOf('%') !== -1) {
// URL-encoded %2Fpath%2Fto%2Ffile.pdf should be file.pdf
try {
suggestedFilename = reFilename.exec(decodeURIComponent(suggestedFilename))[0];
} catch (e) {
}
}
}
return suggestedFilename || 'document.pdf';
}
function normalizeWheelEventDelta(evt) {
var delta = Math.sqrt(evt.deltaX * evt.deltaX + evt.deltaY * evt.deltaY);
var angle = Math.atan2(evt.deltaY, evt.deltaX);
if (-0.25 * Math.PI < angle && angle < 0.75 * Math.PI) {
// All that is left-up oriented has to change the sign.
delta = -delta;
}
var MOUSE_DOM_DELTA_PIXEL_MODE = 0;
var MOUSE_DOM_DELTA_LINE_MODE = 1;
var MOUSE_PIXELS_PER_LINE = 30;
var MOUSE_LINES_PER_PAGE = 30;
// Converts delta to per-page units
if (evt.deltaMode === MOUSE_DOM_DELTA_PIXEL_MODE) {
delta /= MOUSE_PIXELS_PER_LINE * MOUSE_LINES_PER_PAGE;
} else if (evt.deltaMode === MOUSE_DOM_DELTA_LINE_MODE) {
delta /= MOUSE_LINES_PER_PAGE;
}
return delta;
}
/**
* Simple event bus for an application. Listeners are attached using the
* `on` and `off` methods. To raise an event, the `dispatch` method shall be
* used.
*/
var EventBus = function EventBusClosure() {
function EventBus() {
this._listeners = Object.create(null);
}
EventBus.prototype = {
on: function EventBus_on(eventName, listener) {
var eventListeners = this._listeners[eventName];
if (!eventListeners) {
eventListeners = [];
this._listeners[eventName] = eventListeners;
}
eventListeners.push(listener);
},
off: function EventBus_on(eventName, listener) {
var eventListeners = this._listeners[eventName];
var i;
if (!eventListeners || (i = eventListeners.indexOf(listener)) < 0) {
return;
}
eventListeners.splice(i, 1);
},
dispatch: function EventBus_dispath(eventName) {
var eventListeners = this._listeners[eventName];
if (!eventListeners || eventListeners.length === 0) {
return;
}
// Passing all arguments after the eventName to the listeners.
var args = Array.prototype.slice.call(arguments, 1);
// Making copy of the listeners array in case if it will be modified
// during dispatch.
eventListeners.slice(0).forEach(function (listener) {
listener.apply(null, args);
});
}
};
return EventBus;
}();
var ProgressBar = function ProgressBarClosure() {
function clamp(v, min, max) {
return Math.min(Math.max(v, min), max);
}
function ProgressBar(id, opts) {
this.visible = true;
// Fetch the sub-elements for later.
this.div = document.querySelector(id + ' .progress');
// Get the loading bar element, so it can be resized to fit the viewer.
this.bar = this.div.parentNode;
// Get options, with sensible defaults.
this.height = opts.height || 100;
this.width = opts.width || 100;
this.units = opts.units || '%';
// Initialize heights.
this.div.style.height = this.height + this.units;
this.percent = 0;
}
ProgressBar.prototype = {
updateBar: function ProgressBar_updateBar() {
if (this._indeterminate) {
this.div.classList.add('indeterminate');
this.div.style.width = this.width + this.units;
return;
}
this.div.classList.remove('indeterminate');
var progressSize = this.width * this._percent / 100;
this.div.style.width = progressSize + this.units;
},
get percent() {
return this._percent;
},
set percent(val) {
this._indeterminate = isNaN(val);
this._percent = clamp(val, 0, 100);
this.updateBar();
},
setWidth: function ProgressBar_setWidth(viewer) {
if (viewer) {
var container = viewer.parentNode;
var scrollbarWidth = container.offsetWidth - viewer.offsetWidth;
if (scrollbarWidth > 0) {
this.bar.setAttribute('style', 'width: calc(100% - ' + scrollbarWidth + 'px);');
}
}
},
hide: function ProgressBar_hide() {
if (!this.visible) {
return;
}
this.visible = false;
this.bar.classList.add('hidden');
document.body.classList.remove('loadingInProgress');
},
show: function ProgressBar_show() {
if (this.visible) {
return;
}
this.visible = true;
document.body.classList.add('loadingInProgress');
this.bar.classList.remove('hidden');
}
};
return ProgressBar;
}();
exports.CSS_UNITS = CSS_UNITS;
exports.DEFAULT_SCALE_VALUE = DEFAULT_SCALE_VALUE;
exports.DEFAULT_SCALE = DEFAULT_SCALE;
exports.UNKNOWN_SCALE = UNKNOWN_SCALE;
exports.MAX_AUTO_SCALE = MAX_AUTO_SCALE;
exports.SCROLLBAR_PADDING = SCROLLBAR_PADDING;
exports.VERTICAL_PADDING = VERTICAL_PADDING;
exports.mozL10n = mozL10n;
exports.EventBus = EventBus;
exports.ProgressBar = ProgressBar;
exports.getPDFFileNameFromURL = getPDFFileNameFromURL;
exports.noContextMenuHandler = noContextMenuHandler;
exports.parseQueryString = parseQueryString;
exports.getVisibleElements = getVisibleElements;
exports.roundToDivide = roundToDivide;
exports.approximateFraction = approximateFraction;
exports.getOutputScale = getOutputScale;
exports.scrollIntoView = scrollIntoView;
exports.watchScroll = watchScroll;
exports.binarySearchFirstItem = binarySearchFirstItem;
exports.normalizeWheelEventDelta = normalizeWheelEventDelta;
}));
(function (root, factory) {
factory(root.pdfjsWebDOMEvents = {}, root.pdfjsWebUIUtils);
}(this, function (exports, uiUtils) {
var EventBus = uiUtils.EventBus;
// Attaching to the application event bus to dispatch events to the DOM for
// backwards viewer API compatibility.
function attachDOMEventsToEventBus(eventBus) {
eventBus.on('documentload', function () {
var event = document.createEvent('CustomEvent');
event.initCustomEvent('documentload', true, true, {});
window.dispatchEvent(event);
});
eventBus.on('pagerendered', function (e) {
var event = document.createEvent('CustomEvent');
event.initCustomEvent('pagerendered', true, true, {
pageNumber: e.pageNumber,
cssTransform: e.cssTransform
});
e.source.div.dispatchEvent(event);
});
eventBus.on('textlayerrendered', function (e) {
var event = document.createEvent('CustomEvent');
event.initCustomEvent('textlayerrendered', true, true, { pageNumber: e.pageNumber });
e.source.textLayerDiv.dispatchEvent(event);
});
eventBus.on('pagechange', function (e) {
var event = document.createEvent('UIEvents');
event.initUIEvent('pagechange', true, true, window, 0);
event.pageNumber = e.pageNumber;
e.source.container.dispatchEvent(event);
});
eventBus.on('pagesinit', function (e) {
var event = document.createEvent('CustomEvent');
event.initCustomEvent('pagesinit', true, true, null);
e.source.container.dispatchEvent(event);
});
eventBus.on('pagesloaded', function (e) {
var event = document.createEvent('CustomEvent');
event.initCustomEvent('pagesloaded', true, true, { pagesCount: e.pagesCount });
e.source.container.dispatchEvent(event);
});
eventBus.on('scalechange', function (e) {
var event = document.createEvent('UIEvents');
event.initUIEvent('scalechange', true, true, window, 0);
event.scale = e.scale;
event.presetValue = e.presetValue;
e.source.container.dispatchEvent(event);
});
eventBus.on('updateviewarea', function (e) {
var event = document.createEvent('UIEvents');
event.initUIEvent('updateviewarea', true, true, window, 0);
event.location = e.location;
e.source.container.dispatchEvent(event);
});
eventBus.on('find', function (e) {
if (e.source === window) {
return;
}
// event comes from FirefoxCom, no need to replicate
var event = document.createEvent('CustomEvent');
event.initCustomEvent('find' + e.type, true, true, {
query: e.query,
phraseSearch: e.phraseSearch,
caseSensitive: e.caseSensitive,
highlightAll: e.highlightAll,
findPrevious: e.findPrevious
});
window.dispatchEvent(event);
});
eventBus.on('attachmentsloaded', function (e) {
var event = document.createEvent('CustomEvent');
event.initCustomEvent('attachmentsloaded', true, true, { attachmentsCount: e.attachmentsCount });
e.source.container.dispatchEvent(event);
});
eventBus.on('sidebarviewchanged', function (e) {
var event = document.createEvent('CustomEvent');
event.initCustomEvent('sidebarviewchanged', true, true, { view: e.view });
e.source.outerContainer.dispatchEvent(event);
});
eventBus.on('pagemode', function (e) {
var event = document.createEvent('CustomEvent');
event.initCustomEvent('pagemode', true, true, { mode: e.mode });
e.source.pdfViewer.container.dispatchEvent(event);
});
eventBus.on('namedaction', function (e) {
var event = document.createEvent('CustomEvent');
event.initCustomEvent('namedaction', true, true, { action: e.action });
e.source.pdfViewer.container.dispatchEvent(event);
});
eventBus.on('presentationmodechanged', function (e) {
var event = document.createEvent('CustomEvent');
event.initCustomEvent('presentationmodechanged', true, true, {
active: e.active,
switchInProgress: e.switchInProgress
});
window.dispatchEvent(event);
});
eventBus.on('outlineloaded', function (e) {
var event = document.createEvent('CustomEvent');
event.initCustomEvent('outlineloaded', true, true, { outlineCount: e.outlineCount });
e.source.container.dispatchEvent(event);
});
}
var globalEventBus = null;
function getGlobalEventBus() {
if (globalEventBus) {
return globalEventBus;
}
globalEventBus = new EventBus();
attachDOMEventsToEventBus(globalEventBus);
return globalEventBus;
}
exports.attachDOMEventsToEventBus = attachDOMEventsToEventBus;
exports.getGlobalEventBus = getGlobalEventBus;
}));
(function (root, factory) {
factory(root.pdfjsWebPDFFindController = {}, root.pdfjsWebUIUtils);
}(this, function (exports, uiUtils) {
var scrollIntoView = uiUtils.scrollIntoView;
var FindStates = {
FIND_FOUND: 0,
FIND_NOTFOUND: 1,
FIND_WRAPPED: 2,
FIND_PENDING: 3
};
var FIND_SCROLL_OFFSET_TOP = -50;
var FIND_SCROLL_OFFSET_LEFT = -400;
var CHARACTERS_TO_NORMALIZE = {
'\u2018': '\'',
// Left single quotation mark
'\u2019': '\'',
// Right single quotation mark
'\u201A': '\'',
// Single low-9 quotation mark
'\u201B': '\'',
// Single high-reversed-9 quotation mark
'\u201C': '"',
// Left double quotation mark
'\u201D': '"',
// Right double quotation mark
'\u201E': '"',
// Double low-9 quotation mark
'\u201F': '"',
// Double high-reversed-9 quotation mark
'\u00BC': '1/4',
// Vulgar fraction one quarter
'\u00BD': '1/2',
// Vulgar fraction one half
'\u00BE': '3/4'
};
// Vulgar fraction three quarters
/**
* Provides "search" or "find" functionality for the PDF.
* This object actually performs the search for a given string.
*/
var PDFFindController = function PDFFindControllerClosure() {
function PDFFindController(options) {
this.pdfViewer = options.pdfViewer || null;
this.onUpdateResultsCount = null;
this.onUpdateState = null;
this.reset();
// Compile the regular expression for text normalization once.
var replace = Object.keys(CHARACTERS_TO_NORMALIZE).join('');
this.normalizationRegex = new RegExp('[' + replace + ']', 'g');
}
PDFFindController.prototype = {
reset: function PDFFindController_reset() {
this.startedTextExtraction = false;
this.extractTextPromises = [];
this.pendingFindMatches = Object.create(null);
this.active = false;
// If active, find results will be highlighted.
this.pageContents = [];
// Stores the text for each page.
this.pageMatches = [];
this.pageMatchesLength = null;
this.matchCount = 0;
this.selected = {
// Currently selected match.
pageIdx: -1,
matchIdx: -1
};
this.offset = {
// Where the find algorithm currently is in the document.
pageIdx: null,
matchIdx: null
};
this.pagesToSearch = null;
this.resumePageIdx = null;
this.state = null;
this.dirtyMatch = false;
this.findTimeout = null;
this.firstPagePromise = new Promise(function (resolve) {
this.resolveFirstPage = resolve;
}.bind(this));
},
normalize: function PDFFindController_normalize(text) {
return text.replace(this.normalizationRegex, function (ch) {
return CHARACTERS_TO_NORMALIZE[ch];
});
},
// Helper for multiple search - fills matchesWithLength array
// and takes into account cases when one search term
// include another search term (for example, "tamed tame" or "this is").
// Looking for intersecting terms in the 'matches' and
// leave elements with a longer match-length.
_prepareMatches: function PDFFindController_prepareMatches(matchesWithLength, matches, matchesLength) {
function isSubTerm(matchesWithLength, currentIndex) {
var currentElem, prevElem, nextElem;
currentElem = matchesWithLength[currentIndex];
nextElem = matchesWithLength[currentIndex + 1];
// checking for cases like "TAMEd TAME"
if (currentIndex < matchesWithLength.length - 1 && currentElem.match === nextElem.match) {
currentElem.skipped = true;
return true;
}
// checking for cases like "thIS IS"
for (var i = currentIndex - 1; i >= 0; i--) {
prevElem = matchesWithLength[i];
if (prevElem.skipped) {
continue;
}
if (prevElem.match + prevElem.matchLength < currentElem.match) {
break;
}
if (prevElem.match + prevElem.matchLength >= currentElem.match + currentElem.matchLength) {
currentElem.skipped = true;
return true;
}
}
return false;
}
var i, len;
// Sorting array of objects { match: <match>, matchLength: <matchLength> }
// in increasing index first and then the lengths.
matchesWithLength.sort(function (a, b) {
return a.match === b.match ? a.matchLength - b.matchLength : a.match - b.match;
});
for (i = 0, len = matchesWithLength.length; i < len; i++) {
if (isSubTerm(matchesWithLength, i)) {
continue;
}
matches.push(matchesWithLength[i].match);
matchesLength.push(matchesWithLength[i].matchLength);
}
},
calcFindPhraseMatch: function PDFFindController_calcFindPhraseMatch(query, pageIndex, pageContent) {
var matches = [];
var queryLen = query.length;
var matchIdx = -queryLen;
while (true) {
matchIdx = pageContent.indexOf(query, matchIdx + queryLen);
if (matchIdx === -1) {
break;
}
matches.push(matchIdx);
}
this.pageMatches[pageIndex] = matches;
},
calcFindWordMatch: function PDFFindController_calcFindWordMatch(query, pageIndex, pageContent) {
var matchesWithLength = [];
// Divide the query into pieces and search for text on each piece.
var queryArray = query.match(/\S+/g);
var subquery, subqueryLen, matchIdx;
for (var i = 0, len = queryArray.length; i < len; i++) {
subquery = queryArray[i];
subqueryLen = subquery.length;
matchIdx = -subqueryLen;
while (true) {
matchIdx = pageContent.indexOf(subquery, matchIdx + subqueryLen);
if (matchIdx === -1) {
break;
}
// Other searches do not, so we store the length.
matchesWithLength.push({
match: matchIdx,
matchLength: subqueryLen,
skipped: false
});
}
}
// Prepare arrays for store the matches.
if (!this.pageMatchesLength) {
this.pageMatchesLength = [];
}
this.pageMatchesLength[pageIndex] = [];
this.pageMatches[pageIndex] = [];
// Sort matchesWithLength, clean up intersecting terms
// and put the result into the two arrays.
this._prepareMatches(matchesWithLength, this.pageMatches[pageIndex], this.pageMatchesLength[pageIndex]);
},
calcFindMatch: function PDFFindController_calcFindMatch(pageIndex) {
var pageContent = this.normalize(this.pageContents[pageIndex]);
var query = this.normalize(this.state.query);
var caseSensitive = this.state.caseSensitive;
var phraseSearch = this.state.phraseSearch;
var queryLen = query.length;
if (queryLen === 0) {
// Do nothing: the matches should be wiped out already.
return;
}
if (!caseSensitive) {
pageContent = pageContent.toLowerCase();
query = query.toLowerCase();
}
if (phraseSearch) {
this.calcFindPhraseMatch(query, pageIndex, pageContent);
} else {
this.calcFindWordMatch(query, pageIndex, pageContent);
}
this.updatePage(pageIndex);
if (this.resumePageIdx === pageIndex) {
this.resumePageIdx = null;
this.nextPageMatch();
}
// Update the matches count
if (this.pageMatches[pageIndex].length > 0) {
this.matchCount += this.pageMatches[pageIndex].length;
this.updateUIResultsCount();
}
},
extractText: function PDFFindController_extractText() {
if (this.startedTextExtraction) {
return;
}
this.startedTextExtraction = true;
this.pageContents = [];
var extractTextPromisesResolves = [];
var numPages = this.pdfViewer.pagesCount;
for (var i = 0; i < numPages; i++) {
this.extractTextPromises.push(new Promise(function (resolve) {
extractTextPromisesResolves.push(resolve);
}));
}
var self = this;
function extractPageText(pageIndex) {
self.pdfViewer.getPageTextContent(pageIndex).then(function textContentResolved(textContent) {
var textItems = textContent.items;
var str = [];
for (var i = 0, len = textItems.length; i < len; i++) {
str.push(textItems[i].str);
}
// Store the pageContent as a string.
self.pageContents.push(str.join(''));
extractTextPromisesResolves[pageIndex](pageIndex);
if (pageIndex + 1 < self.pdfViewer.pagesCount) {
extractPageText(pageIndex + 1);
}
});
}
extractPageText(0);
},
executeCommand: function PDFFindController_executeCommand(cmd, state) {
if (this.state === null || cmd !== 'findagain') {
this.dirtyMatch = true;
}
this.state = state;
this.updateUIState(FindStates.FIND_PENDING);
this.firstPagePromise.then(function () {
this.extractText();
clearTimeout(this.findTimeout);
if (cmd === 'find') {
// Only trigger the find action after 250ms of silence.
this.findTimeout = setTimeout(this.nextMatch.bind(this), 250);
} else {
this.nextMatch();
}
}.bind(this));
},
updatePage: function PDFFindController_updatePage(index) {
if (this.selected.pageIdx === index) {
// If the page is selected, scroll the page into view, which triggers
// rendering the page, which adds the textLayer. Once the textLayer is
// build, it will scroll onto the selected match.
this.pdfViewer.currentPageNumber = index + 1;
}
var page = this.pdfViewer.getPageView(index);
if (page.textLayer) {
page.textLayer.updateMatches();
}
},
nextMatch: function PDFFindController_nextMatch() {
var previous = this.state.findPrevious;
var currentPageIndex = this.pdfViewer.currentPageNumber - 1;
var numPages = this.pdfViewer.pagesCount;
this.active = true;
if (this.dirtyMatch) {
// Need to recalculate the matches, reset everything.
this.dirtyMatch = false;
this.selected.pageIdx = this.selected.matchIdx = -1;
this.offset.pageIdx = currentPageIndex;
this.offset.matchIdx = null;
this.hadMatch = false;
this.resumePageIdx = null;
this.pageMatches = [];
this.matchCount = 0;
this.pageMatchesLength = null;
var self = this;
for (var i = 0; i < numPages; i++) {
// Wipe out any previous highlighted matches.
this.updatePage(i);
// As soon as the text is extracted start finding the matches.
if (!(i in this.pendingFindMatches)) {
this.pendingFindMatches[i] = true;
this.extractTextPromises[i].then(function (pageIdx) {
delete self.pendingFindMatches[pageIdx];
self.calcFindMatch(pageIdx);
});
}
}
}
// If there's no query there's no point in searching.
if (this.state.query === '') {
this.updateUIState(FindStates.FIND_FOUND);
return;
}
// If we're waiting on a page, we return since we can't do anything else.
if (this.resumePageIdx) {
return;
}
var offset = this.offset;
// Keep track of how many pages we should maximally iterate through.
this.pagesToSearch = numPages;
// If there's already a matchIdx that means we are iterating through a
// page's matches.
if (offset.matchIdx !== null) {
var numPageMatches = this.pageMatches[offset.pageIdx].length;
if (!previous && offset.matchIdx + 1 < numPageMatches || previous && offset.matchIdx > 0) {
// The simple case; we just have advance the matchIdx to select
// the next match on the page.
this.hadMatch = true;
offset.matchIdx = previous ? offset.matchIdx - 1 : offset.matchIdx + 1;
this.updateMatch(true);
return;
}
// We went beyond the current page's matches, so we advance to
// the next page.
this.advanceOffsetPage(previous);
}
// Start searching through the page.
this.nextPageMatch();
},
matchesReady: function PDFFindController_matchesReady(matches) {
var offset = this.offset;
var numMatches = matches.length;
var previous = this.state.findPrevious;
if (numMatches) {
// There were matches for the page, so initialize the matchIdx.
this.hadMatch = true;
offset.matchIdx = previous ? numMatches - 1 : 0;
this.updateMatch(true);
return true;
} else {
// No matches, so attempt to search the next page.
this.advanceOffsetPage(previous);
if (offset.wrapped) {
offset.matchIdx = null;
if (this.pagesToSearch < 0) {
// No point in wrapping again, there were no matches.
this.updateMatch(false);
// while matches were not found, searching for a page
// with matches should nevertheless halt.
return true;
}
}
// Matches were not found (and searching is not done).
return false;
}
},
/**
* The method is called back from the text layer when match presentation
* is updated.
* @param {number} pageIndex - page index.
* @param {number} index - match index.
* @param {Array} elements - text layer div elements array.
* @param {number} beginIdx - start index of the div array for the match.
*/
updateMatchPosition: function PDFFindController_updateMatchPosition(pageIndex, index, elements, beginIdx) {
if (this.selected.matchIdx === index && this.selected.pageIdx === pageIndex) {
var spot = {
top: FIND_SCROLL_OFFSET_TOP,
left: FIND_SCROLL_OFFSET_LEFT
};
scrollIntoView(elements[beginIdx], spot, /* skipOverflowHiddenElements = */
true);
}
},
nextPageMatch: function PDFFindController_nextPageMatch() {
if (this.resumePageIdx !== null) {
console.error('There can only be one pending page.');
}
do {
var pageIdx = this.offset.pageIdx;
var matches = this.pageMatches[pageIdx];
if (!matches) {
// The matches don't exist yet for processing by "matchesReady",
// so set a resume point for when they do exist.
this.resumePageIdx = pageIdx;
break;
}
} while (!this.matchesReady(matches));
},
advanceOffsetPage: function PDFFindController_advanceOffsetPage(previous) {
var offset = this.offset;
var numPages = this.extractTextPromises.length;
offset.pageIdx = previous ? offset.pageIdx - 1 : offset.pageIdx + 1;
offset.matchIdx = null;
this.pagesToSearch--;
if (offset.pageIdx >= numPages || offset.pageIdx < 0) {
offset.pageIdx = previous ? numPages - 1 : 0;
offset.wrapped = true;
}
},
updateMatch: function PDFFindController_updateMatch(found) {
var state = FindStates.FIND_NOTFOUND;
var wrapped = this.offset.wrapped;
this.offset.wrapped = false;
if (found) {
var previousPage = this.selected.pageIdx;
this.selected.pageIdx = this.offset.pageIdx;
this.selected.matchIdx = this.offset.matchIdx;
state = wrapped ? FindStates.FIND_WRAPPED : FindStates.FIND_FOUND;
// Update the currently selected page to wipe out any selected matches.
if (previousPage !== -1 && previousPage !== this.selected.pageIdx) {
this.updatePage(previousPage);
}
}
this.updateUIState(state, this.state.findPrevious);
if (this.selected.pageIdx !== -1) {
this.updatePage(this.selected.pageIdx);
}
},
updateUIResultsCount: function PDFFindController_updateUIResultsCount() {
if (this.onUpdateResultsCount) {
this.onUpdateResultsCount(this.matchCount);
}
},
updateUIState: function PDFFindController_updateUIState(state, previous) {
if (this.onUpdateState) {
this.onUpdateState(state, previous, this.matchCount);
}
}
};
return PDFFindController;
}();
exports.FindStates = FindStates;
exports.PDFFindController = PDFFindController;
}));
(function (root, factory) {
factory(root.pdfjsWebPDFHistory = {}, root.pdfjsWebDOMEvents);
}(this, function (exports, domEvents) {
function PDFHistory(options) {
this.linkService = options.linkService;
this.eventBus = options.eventBus || domEvents.getGlobalEventBus();
this.initialized = false;
this.initialDestination = null;
this.initialBookmark = null;
}
PDFHistory.prototype = {
/**
* @param {string} fingerprint
*/
initialize: function pdfHistoryInitialize(fingerprint) {
this.initialized = true;
this.reInitialized = false;
this.allowHashChange = true;
this.historyUnlocked = true;
this.isViewerInPresentationMode = false;
this.previousHash = window.location.hash.substring(1);
this.currentBookmark = '';
this.currentPage = 0;
this.updatePreviousBookmark = false;
this.previousBookmark = '';
this.previousPage = 0;
this.nextHashParam = '';
this.fingerprint = fingerprint;
this.currentUid = this.uid = 0;
this.current = {};
var state = window.history.state;
if (this._isStateObjectDefined(state)) {
// This corresponds to navigating back to the document
// from another page in the browser history.
if (state.target.dest) {
this.initialDestination = state.target.dest;
} else {
this.initialBookmark = state.target.hash;
}
this.currentUid = state.uid;
this.uid = state.uid + 1;
this.current = state.target;
} else {
// This corresponds to the loading of a new document.
if (state && state.fingerprint && this.fingerprint !== state.fingerprint) {
// Reinitialize the browsing history when a new document
// is opened in the web viewer.
this.reInitialized = true;
}
this._pushOrReplaceState({ fingerprint: this.fingerprint }, true);
}
var self = this;
window.addEventListener('popstate', function pdfHistoryPopstate(evt) {
if (!self.historyUnlocked) {
return;
}
if (evt.state) {
// Move back/forward in the history.
self._goTo(evt.state);
return;
}
// If the state is not set, then the user tried to navigate to a
// different hash by manually editing the URL and pressing Enter, or by
// clicking on an in-page link (e.g. the "current view" link).
// Save the current view state to the browser history.
// Note: In Firefox, history.null could also be null after an in-page
// navigation to the same URL, and without dispatching the popstate
// event: https://bugzilla.mozilla.org/show_bug.cgi?id=1183881
if (self.uid === 0) {
// Replace the previous state if it was not explicitly set.
var previousParams = self.previousHash && self.currentBookmark && self.previousHash !== self.currentBookmark ? {
hash: self.currentBookmark,
page: self.currentPage
} : { page: 1 };
replacePreviousHistoryState(previousParams, function () {
updateHistoryWithCurrentHash();
});
} else {
updateHistoryWithCurrentHash();
}
}, false);
function updateHistoryWithCurrentHash() {
self.previousHash = window.location.hash.slice(1);
self._pushToHistory({ hash: self.previousHash }, false, true);
self._updatePreviousBookmark();
}
function replacePreviousHistoryState(params, callback) {
// To modify the previous history entry, the following happens:
// 1. history.back()
// 2. _pushToHistory, which calls history.replaceState( ... )
// 3. history.forward()
// Because a navigation via the history API does not immediately update
// the history state, the popstate event is used for synchronization.
self.historyUnlocked = false;
// Suppress the hashchange event to avoid side effects caused by
// navigating back and forward.
self.allowHashChange = false;
window.addEventListener('popstate', rewriteHistoryAfterBack);
history.back();
function rewriteHistoryAfterBack() {
window.removeEventListener('popstate', rewriteHistoryAfterBack);
window.addEventListener('popstate', rewriteHistoryAfterForward);
self._pushToHistory(params, false, true);
history.forward();
}
function rewriteHistoryAfterForward() {
window.removeEventListener('popstate', rewriteHistoryAfterForward);
self.allowHashChange = true;
self.historyUnlocked = true;
callback();
}
}
function pdfHistoryBeforeUnload() {
var previousParams = self._getPreviousParams(null, true);
if (previousParams) {
var replacePrevious = !self.current.dest && self.current.hash !== self.previousHash;
self._pushToHistory(previousParams, false, replacePrevious);
self._updatePreviousBookmark();
}
// Remove the event listener when navigating away from the document,
// since 'beforeunload' prevents Firefox from caching the document.
window.removeEventListener('beforeunload', pdfHistoryBeforeUnload, false);
}
window.addEventListener('beforeunload', pdfHistoryBeforeUnload, false);
window.addEventListener('pageshow', function pdfHistoryPageShow(evt) {
// If the entire viewer (including the PDF file) is cached in
// the browser, we need to reattach the 'beforeunload' event listener
// since the 'DOMContentLoaded' event is not fired on 'pageshow'.
window.addEventListener('beforeunload', pdfHistoryBeforeUnload, false);
}, false);
self.eventBus.on('presentationmodechanged', function (e) {
self.isViewerInPresentationMode = e.active;
});
},
clearHistoryState: function pdfHistory_clearHistoryState() {
this._pushOrReplaceState(null, true);
},
_isStateObjectDefined: function pdfHistory_isStateObjectDefined(state) {
return state && state.uid >= 0 && state.fingerprint && this.fingerprint === state.fingerprint && state.target && state.target.hash ? true : false;
},
_pushOrReplaceState: function pdfHistory_pushOrReplaceState(stateObj, replace) {
if (replace) {
window.history.replaceState(stateObj, '', document.URL);
} else {
window.history.pushState(stateObj, '', document.URL);
}
},
get isHashChangeUnlocked() {
if (!this.initialized) {
return true;
}
return this.allowHashChange;
},
_updatePreviousBookmark: function pdfHistory_updatePreviousBookmark() {
if (this.updatePreviousBookmark && this.currentBookmark && this.currentPage) {
this.previousBookmark = this.currentBookmark;
this.previousPage = this.currentPage;
this.updatePreviousBookmark = false;
}
},
updateCurrentBookmark: function pdfHistoryUpdateCurrentBookmark(bookmark, pageNum) {
if (this.initialized) {
this.currentBookmark = bookmark.substring(1);
this.currentPage = pageNum | 0;
this._updatePreviousBookmark();
}
},
updateNextHashParam: function pdfHistoryUpdateNextHashParam(param) {
if (this.initialized) {
this.nextHashParam = param;
}
},
push: function pdfHistoryPush(params, isInitialBookmark) {
if (!(this.initialized && this.historyUnlocked)) {
return;
}
if (params.dest && !params.hash) {
params.hash = this.current.hash && this.current.dest && this.current.dest === params.dest ? this.current.hash : this.linkService.getDestinationHash(params.dest).split('#')[1];
}
if (params.page) {
params.page |= 0;
}
if (isInitialBookmark) {
var target = window.history.state.target;
if (!target) {
// Invoked when the user specifies an initial bookmark,
// thus setting initialBookmark, when the document is loaded.
this._pushToHistory(params, false);
this.previousHash = window.location.hash.substring(1);
}
this.updatePreviousBookmark = this.nextHashParam ? false : true;
if (target) {
// If the current document is reloaded,
// avoid creating duplicate entries in the history.
this._updatePreviousBookmark();
}
return;
}
if (this.nextHashParam) {
if (this.nextHashParam === params.hash) {
this.nextHashParam = null;
this.updatePreviousBookmark = true;
return;
} else {
this.nextHashParam = null;
}
}
if (params.hash) {
if (this.current.hash) {
if (this.current.hash !== params.hash) {
this._pushToHistory(params, true);
} else {
if (!this.current.page && params.page) {
this._pushToHistory(params, false, true);
}
this.updatePreviousBookmark = true;
}
} else {
this._pushToHistory(params, true);
}
} else if (this.current.page && params.page && this.current.page !== params.page) {
this._pushToHistory(params, true);
}
},
_getPreviousParams: function pdfHistory_getPreviousParams(onlyCheckPage, beforeUnload) {
if (!(this.currentBookmark && this.currentPage)) {
return null;
} else if (this.updatePreviousBookmark) {
this.updatePreviousBookmark = false;
}
if (this.uid > 0 && !(this.previousBookmark && this.previousPage)) {
// Prevent the history from getting stuck in the current state,
// effectively preventing the user from going back/forward in
// the history.
//
// This happens if the current position in the document didn't change
// when the history was previously updated. The reasons for this are
// either:
// 1. The current zoom value is such that the document does not need to,
// or cannot, be scrolled to display the destination.
// 2. The previous destination is broken, and doesn't actally point to a
// position within the document.
// (This is either due to a bad PDF generator, or the user making a
// mistake when entering a destination in the hash parameters.)
return null;
}
if (!this.current.dest && !onlyCheckPage || beforeUnload) {
if (this.previousBookmark === this.currentBookmark) {
return null;
}
} else if (this.current.page || onlyCheckPage) {
if (this.previousPage === this.currentPage) {
return null;
}
} else {
return null;
}
var params = {
hash: this.currentBookmark,
page: this.currentPage
};
if (this.isViewerInPresentationMode) {
params.hash = null;
}
return params;
},
_stateObj: function pdfHistory_stateObj(params) {
return {
fingerprint: this.fingerprint,
uid: this.uid,
target: params
};
},
_pushToHistory: function pdfHistory_pushToHistory(params, addPrevious, overwrite) {
if (!this.initialized) {
return;
}
if (!params.hash && params.page) {
params.hash = 'page=' + params.page;
}
if (addPrevious && !overwrite) {
var previousParams = this._getPreviousParams();
if (previousParams) {
var replacePrevious = !this.current.dest && this.current.hash !== this.previousHash;
this._pushToHistory(previousParams, false, replacePrevious);
}
}
this._pushOrReplaceState(this._stateObj(params), overwrite || this.uid === 0);
this.currentUid = this.uid++;
this.current = params;
this.updatePreviousBookmark = true;
},
_goTo: function pdfHistory_goTo(state) {
if (!(this.initialized && this.historyUnlocked && this._isStateObjectDefined(state))) {
return;
}
if (!this.reInitialized && state.uid < this.currentUid) {
var previousParams = this._getPreviousParams(true);
if (previousParams) {
this._pushToHistory(this.current, false);
this._pushToHistory(previousParams, false);
this.currentUid = state.uid;
window.history.back();
return;
}
}
this.historyUnlocked = false;
if (state.target.dest) {
this.linkService.navigateTo(state.target.dest);
} else {
this.linkService.setHash(state.target.hash);
}
this.currentUid = state.uid;
if (state.uid > this.uid) {
this.uid = state.uid;
}
this.current = state.target;
this.updatePreviousBookmark = true;
var currentHash = window.location.hash.substring(1);
if (this.previousHash !== currentHash) {
this.allowHashChange = false;
}
this.previousHash = currentHash;
this.historyUnlocked = true;
},
back: function pdfHistoryBack() {
this.go(-1);
},
forward: function pdfHistoryForward() {
this.go(1);
},
go: function pdfHistoryGo(direction) {
if (this.initialized && this.historyUnlocked) {
var state = window.history.state;
if (direction === -1 && state && state.uid > 0) {
window.history.back();
} else if (direction === 1 && state && state.uid < this.uid - 1) {
window.history.forward();
}
}
}
};
exports.PDFHistory = PDFHistory;
}));
(function (root, factory) {
factory(root.pdfjsWebPDFLinkService = {}, root.pdfjsWebUIUtils, root.pdfjsWebDOMEvents);
}(this, function (exports, uiUtils, domEvents) {
var parseQueryString = uiUtils.parseQueryString;
var PageNumberRegExp = /^\d+$/;
function isPageNumber(str) {
return PageNumberRegExp.test(str);
}
/**
* @typedef {Object} PDFLinkServiceOptions
* @property {EventBus} eventBus - The application event bus.
*/
/**
* Performs navigation functions inside PDF, such as opening specified page,
* or destination.
* @class
* @implements {IPDFLinkService}
*/
var PDFLinkService = function PDFLinkServiceClosure() {
/**
* @constructs PDFLinkService
* @param {PDFLinkServiceOptions} options
*/
function PDFLinkService(options) {
options = options || {};
this.eventBus = options.eventBus || domEvents.getGlobalEventBus();
this.baseUrl = null;
this.pdfDocument = null;
this.pdfViewer = null;
this.pdfHistory = null;
this._pagesRefCache = null;
}
PDFLinkService.prototype = {
setDocument: function PDFLinkService_setDocument(pdfDocument, baseUrl) {
this.baseUrl = baseUrl;
this.pdfDocument = pdfDocument;
this._pagesRefCache = Object.create(null);
},
setViewer: function PDFLinkService_setViewer(pdfViewer) {
this.pdfViewer = pdfViewer;
},
setHistory: function PDFLinkService_setHistory(pdfHistory) {
this.pdfHistory = pdfHistory;
},
/**
* @returns {number}
*/
get pagesCount() {
return this.pdfDocument ? this.pdfDocument.numPages : 0;
},
/**
* @returns {number}
*/
get page() {
return this.pdfViewer.currentPageNumber;
},
/**
* @param {number} value
*/
set page(value) {
this.pdfViewer.currentPageNumber = value;
},
/**
* @param dest - The PDF destination object.
*/
navigateTo: function PDFLinkService_navigateTo(dest) {
var destString = '';
var self = this;
var goToDestination = function (destRef) {
// dest array looks like that: <page-ref> </XYZ|/FitXXX> <args..>
var pageNumber;
if (destRef instanceof Object) {
pageNumber = self._cachedPageNumber(destRef);
} else if ((destRef | 0) === destRef) {
// Integer
pageNumber = destRef + 1;
} else {
console.error('PDFLinkService_navigateTo: "' + destRef + '" is not a valid destination reference.');
return;
}
if (pageNumber) {
if (pageNumber < 1 || pageNumber > self.pagesCount) {
console.error('PDFLinkService_navigateTo: "' + pageNumber + '" is a non-existent page number.');
return;
}
self.pdfViewer.scrollPageIntoView({
pageNumber: pageNumber,
destArray: dest
});
if (self.pdfHistory) {
// Update the browsing history.
self.pdfHistory.push({
dest: dest,
hash: destString,
page: pageNumber
});
}
} else {
self.pdfDocument.getPageIndex(destRef).then(function (pageIndex) {
self.cachePageRef(pageIndex + 1, destRef);
goToDestination(destRef);
}).catch(function () {
console.error('PDFLinkService_navigateTo: "' + destRef + '" is not a valid page reference.');
return;
});
}
};
var destinationPromise;
if (typeof dest === 'string') {
destString = dest;
destinationPromise = this.pdfDocument.getDestination(dest);
} else {
destinationPromise = Promise.resolve(dest);
}
destinationPromise.then(function (destination) {
dest = destination;
if (!(destination instanceof Array)) {
console.error('PDFLinkService_navigateTo: "' + destination + '" is not a valid destination array.');
return;
}
goToDestination(destination[0]);
});
},
/**
* @param dest - The PDF destination object.
* @returns {string} The hyperlink to the PDF object.
*/
getDestinationHash: function PDFLinkService_getDestinationHash(dest) {
if (typeof dest === 'string') {
// In practice, a named destination may contain only a number.
// If that happens, use the '#nameddest=' form to avoid the link
// redirecting to a page, instead of the correct destination.
return this.getAnchorUrl('#' + (isPageNumber(dest) ? 'nameddest=' : '') + escape(dest));
}
if (dest instanceof Array) {
var str = JSON.stringify(dest);
return this.getAnchorUrl('#' + escape(str));
}
return this.getAnchorUrl('');
},
/**
* Prefix the full url on anchor links to make sure that links are resolved
* relative to the current URL instead of the one defined in <base href>.
* @param {String} anchor The anchor hash, including the #.
* @returns {string} The hyperlink to the PDF object.
*/
getAnchorUrl: function PDFLinkService_getAnchorUrl(anchor) {
return (this.baseUrl || '') + anchor;
},
/**
* @param {string} hash
*/
setHash: function PDFLinkService_setHash(hash) {
var pageNumber, dest;
if (hash.indexOf('=') >= 0) {
var params = parseQueryString(hash);
if ('search' in params) {
this.eventBus.dispatch('findfromurlhash', {
source: this,
query: params['search'].replace(/"/g, ''),
phraseSearch: params['phrase'] === 'true'
});
}
// borrowing syntax from "Parameters for Opening PDF Files"
if ('nameddest' in params) {
if (this.pdfHistory) {
this.pdfHistory.updateNextHashParam(params.nameddest);
}
this.navigateTo(params.nameddest);
return;
}
if ('page' in params) {
pageNumber = params.page | 0 || 1;
}
if ('zoom' in params) {
// Build the destination array.
var zoomArgs = params.zoom.split(',');
// scale,left,top
var zoomArg = zoomArgs[0];
var zoomArgNumber = parseFloat(zoomArg);
if (zoomArg.indexOf('Fit') === -1) {
// If the zoomArg is a number, it has to get divided by 100. If it's
// a string, it should stay as it is.
dest = [
null,
{ name: 'XYZ' },
zoomArgs.length > 1 ? zoomArgs[1] | 0 : null,
zoomArgs.length > 2 ? zoomArgs[2] | 0 : null,
zoomArgNumber ? zoomArgNumber / 100 : zoomArg
];
} else {
if (zoomArg === 'Fit' || zoomArg === 'FitB') {
dest = [
null,
{ name: zoomArg }
];
} else if (zoomArg === 'FitH' || zoomArg === 'FitBH' || (zoomArg === 'FitV' || zoomArg === 'FitBV')) {
dest = [
null,
{ name: zoomArg },
zoomArgs.length > 1 ? zoomArgs[1] | 0 : null
];
} else if (zoomArg === 'FitR') {
if (zoomArgs.length !== 5) {
console.error('PDFLinkService_setHash: ' + 'Not enough parameters for \'FitR\'.');
} else {
dest = [
null,
{ name: zoomArg },
zoomArgs[1] | 0,
zoomArgs[2] | 0,
zoomArgs[3] | 0,
zoomArgs[4] | 0
];
}
} else {
console.error('PDFLinkService_setHash: \'' + zoomArg + '\' is not a valid zoom value.');
}
}
}
if (dest) {
this.pdfViewer.scrollPageIntoView({
pageNumber: pageNumber || this.page,
destArray: dest,
allowNegativeOffset: true
});
} else if (pageNumber) {
this.page = pageNumber;
}
// simple page
if ('pagemode' in params) {
this.eventBus.dispatch('pagemode', {
source: this,
mode: params.pagemode
});
}
} else {
// Named (or explicit) destination.
if (isPageNumber(hash) && hash <= this.pagesCount) {
console.warn('PDFLinkService_setHash: specifying a page number ' + 'directly after the hash symbol (#) is deprecated, ' + 'please use the "#page=' + hash + '" form instead.');
this.page = hash | 0;
}
dest = unescape(hash);
try {
dest = JSON.parse(dest);
if (!(dest instanceof Array)) {
// Avoid incorrectly rejecting a valid named destination, such as
// e.g. "4.3" or "true", because `JSON.parse` converted its type.
dest = dest.toString();
}
} catch (ex) {
}
if (typeof dest === 'string' || isValidExplicitDestination(dest)) {
if (this.pdfHistory) {
this.pdfHistory.updateNextHashParam(dest);
}
this.navigateTo(dest);
return;
}
console.error('PDFLinkService_setHash: \'' + unescape(hash) + '\' is not a valid destination.');
}
},
/**
* @param {string} action
*/
executeNamedAction: function PDFLinkService_executeNamedAction(action) {
// See PDF reference, table 8.45 - Named action
switch (action) {
case 'GoBack':
if (this.pdfHistory) {
this.pdfHistory.back();
}
break;
case 'GoForward':
if (this.pdfHistory) {
this.pdfHistory.forward();
}
break;
case 'NextPage':
if (this.page < this.pagesCount) {
this.page++;
}
break;
case 'PrevPage':
if (this.page > 1) {
this.page--;
}
break;
case 'LastPage':
this.page = this.pagesCount;
break;
case 'FirstPage':
this.page = 1;
break;
default:
break;
}
// No action according to spec
this.eventBus.dispatch('namedaction', {
source: this,
action: action
});
},
/**
* @param {number} pageNum - page number.
* @param {Object} pageRef - reference to the page.
*/
cachePageRef: function PDFLinkService_cachePageRef(pageNum, pageRef) {
var refStr = pageRef.num + ' ' + pageRef.gen + ' R';
this._pagesRefCache[refStr] = pageNum;
},
_cachedPageNumber: function PDFLinkService_cachedPageNumber(pageRef) {
var refStr = pageRef.num + ' ' + pageRef.gen + ' R';
return this._pagesRefCache && this._pagesRefCache[refStr] || null;
}
};
function isValidExplicitDestination(dest) {
if (!(dest instanceof Array)) {
return false;
}
var destLength = dest.length, allowNull = true;
if (destLength < 2) {
return false;
}
var page = dest[0];
if (!(typeof page === 'object' && typeof page.num === 'number' && (page.num | 0) === page.num && typeof page.gen === 'number' && (page.gen | 0) === page.gen) && !(typeof page === 'number' && (page | 0) === page && page >= 0)) {
return false;
}
var zoom = dest[1];
if (!(typeof zoom === 'object' && typeof zoom.name === 'string')) {
return false;
}
switch (zoom.name) {
case 'XYZ':
if (destLength !== 5) {
return false;
}
break;
case 'Fit':
case 'FitB':
return destLength === 2;
case 'FitH':
case 'FitBH':
case 'FitV':
case 'FitBV':
if (destLength !== 3) {
return false;
}
break;
case 'FitR':
if (destLength !== 6) {
return false;
}
allowNull = false;
break;
default:
return false;
}
for (var i = 2; i < destLength; i++) {
var param = dest[i];
if (!(typeof param === 'number' || allowNull && param === null)) {
return false;
}
}
return true;
}
return PDFLinkService;
}();
var SimpleLinkService = function SimpleLinkServiceClosure() {
function SimpleLinkService() {
}
SimpleLinkService.prototype = {
/**
* @returns {number}
*/
get page() {
return 0;
},
/**
* @param {number} value
*/
set page(value) {
},
/**
* @param dest - The PDF destination object.
*/
navigateTo: function (dest) {
},
/**
* @param dest - The PDF destination object.
* @returns {string} The hyperlink to the PDF object.
*/
getDestinationHash: function (dest) {
return '#';
},
/**
* @param hash - The PDF parameters/hash.
* @returns {string} The hyperlink to the PDF object.
*/
getAnchorUrl: function (hash) {
return '#';
},
/**
* @param {string} hash
*/
setHash: function (hash) {
},
/**
* @param {string} action
*/
executeNamedAction: function (action) {
},
/**
* @param {number} pageNum - page number.
* @param {Object} pageRef - reference to the page.
*/
cachePageRef: function (pageNum, pageRef) {
}
};
return SimpleLinkService;
}();
exports.PDFLinkService = PDFLinkService;
exports.SimpleLinkService = SimpleLinkService;
}));
(function (root, factory) {
factory(root.pdfjsWebPDFPageView = {}, root.pdfjsWebUIUtils, root.pdfjsWebPDFRenderingQueue, root.pdfjsWebDOMEvents, root.pdfjsWebPDFJS);
}(this, function (exports, uiUtils, pdfRenderingQueue, domEvents, pdfjsLib) {
var CSS_UNITS = uiUtils.CSS_UNITS;
var DEFAULT_SCALE = uiUtils.DEFAULT_SCALE;
var getOutputScale = uiUtils.getOutputScale;
var approximateFraction = uiUtils.approximateFraction;
var roundToDivide = uiUtils.roundToDivide;
var RenderingStates = pdfRenderingQueue.RenderingStates;
var TEXT_LAYER_RENDER_DELAY = 200;
// ms
/**
* @typedef {Object} PDFPageViewOptions
* @property {HTMLDivElement} container - The viewer element.
* @property {EventBus} eventBus - The application event bus.
* @property {number} id - The page unique ID (normally its number).
* @property {number} scale - The page scale display.
* @property {PageViewport} defaultViewport - The page viewport.
* @property {PDFRenderingQueue} renderingQueue - The rendering queue object.
* @property {IPDFTextLayerFactory} textLayerFactory
* @property {IPDFAnnotationLayerFactory} annotationLayerFactory
* @property {boolean} enhanceTextSelection - Turns on the text selection
* enhancement. The default is `false`.
* @property {boolean} renderInteractiveForms - Turns on rendering of
* interactive form elements. The default is `false`.
*/
/**
* @class
* @implements {IRenderableView}
*/
var PDFPageView = function PDFPageViewClosure() {
/**
* @constructs PDFPageView
* @param {PDFPageViewOptions} options
*/
function PDFPageView(options) {
var container = options.container;
var id = options.id;
var scale = options.scale;
var defaultViewport = options.defaultViewport;
var renderingQueue = options.renderingQueue;
var textLayerFactory = options.textLayerFactory;
var annotationLayerFactory = options.annotationLayerFactory;
var enhanceTextSelection = options.enhanceTextSelection || false;
var renderInteractiveForms = options.renderInteractiveForms || false;
this.id = id;
this.renderingId = 'page' + id;
this.pageLabel = null;
this.rotation = 0;
this.scale = scale || DEFAULT_SCALE;
this.viewport = defaultViewport;
this.pdfPageRotate = defaultViewport.rotation;
this.hasRestrictedScaling = false;
this.enhanceTextSelection = enhanceTextSelection;
this.renderInteractiveForms = renderInteractiveForms;
this.eventBus = options.eventBus || domEvents.getGlobalEventBus();
this.renderingQueue = renderingQueue;
this.textLayerFactory = textLayerFactory;
this.annotationLayerFactory = annotationLayerFactory;
this.renderTask = null;
this.renderingState = RenderingStates.INITIAL;
this.resume = null;
this.onBeforeDraw = null;
this.onAfterDraw = null;
this.textLayer = null;
this.zoomLayer = null;
this.annotationLayer = null;
var div = document.createElement('div');
div.id = 'pageContainer' + this.id;
div.className = 'page';
div.style.width = Math.floor(this.viewport.width) + 'px';
div.style.height = Math.floor(this.viewport.height) + 'px';
div.setAttribute('data-page-number', this.id);
this.div = div;
container.appendChild(div);
}
PDFPageView.prototype = {
setPdfPage: function PDFPageView_setPdfPage(pdfPage) {
this.pdfPage = pdfPage;
this.pdfPageRotate = pdfPage.rotate;
var totalRotation = (this.rotation + this.pdfPageRotate) % 360;
this.viewport = pdfPage.getViewport(this.scale * CSS_UNITS, totalRotation);
this.stats = pdfPage.stats;
this.reset();
},
destroy: function PDFPageView_destroy() {
this.zoomLayer = null;
this.reset();
if (this.pdfPage) {
this.pdfPage.cleanup();
}
},
reset: function PDFPageView_reset(keepZoomLayer, keepAnnotations) {
this.cancelRendering();
var div = this.div;
div.style.width = Math.floor(this.viewport.width) + 'px';
div.style.height = Math.floor(this.viewport.height) + 'px';
var childNodes = div.childNodes;
var currentZoomLayerNode = keepZoomLayer && this.zoomLayer || null;
var currentAnnotationNode = keepAnnotations && this.annotationLayer && this.annotationLayer.div || null;
for (var i = childNodes.length - 1; i >= 0; i--) {
var node = childNodes[i];
if (currentZoomLayerNode === node || currentAnnotationNode === node) {
continue;
}
div.removeChild(node);
}
div.removeAttribute('data-loaded');
if (currentAnnotationNode) {
// Hide annotationLayer until all elements are resized
// so they are not displayed on the already-resized page
this.annotationLayer.hide();
} else {
this.annotationLayer = null;
}
if (this.canvas && !currentZoomLayerNode) {
// Zeroing the width and height causes Firefox to release graphics
// resources immediately, which can greatly reduce memory consumption.
this.canvas.width = 0;
this.canvas.height = 0;
delete this.canvas;
}
this.loadingIconDiv = document.createElement('div');
this.loadingIconDiv.className = 'loadingIcon';
div.appendChild(this.loadingIconDiv);
},
update: function PDFPageView_update(scale, rotation) {
this.scale = scale || this.scale;
if (typeof rotation !== 'undefined') {
this.rotation = rotation;
}
var totalRotation = (this.rotation + this.pdfPageRotate) % 360;
this.viewport = this.viewport.clone({
scale: this.scale * CSS_UNITS,
rotation: totalRotation
});
var isScalingRestricted = false;
if (this.canvas && pdfjsLib.PDFJS.maxCanvasPixels > 0) {
var outputScale = this.outputScale;
if ((Math.floor(this.viewport.width) * outputScale.sx | 0) * (Math.floor(this.viewport.height) * outputScale.sy | 0) > pdfjsLib.PDFJS.maxCanvasPixels) {
isScalingRestricted = true;
}
}
if (this.canvas) {
if (pdfjsLib.PDFJS.useOnlyCssZoom || this.hasRestrictedScaling && isScalingRestricted) {
this.cssTransform(this.canvas, true);
this.eventBus.dispatch('pagerendered', {
source: this,
pageNumber: this.id,
cssTransform: true
});
return;
}
if (!this.zoomLayer) {
this.zoomLayer = this.canvas.parentNode;
this.zoomLayer.style.position = 'absolute';
}
}
if (this.zoomLayer) {
this.cssTransform(this.zoomLayer.firstChild);
}
this.reset(/* keepZoomLayer = */
true, /* keepAnnotations = */
true);
},
cancelRendering: function PDFPageView_cancelRendering() {
if (this.renderTask) {
this.renderTask.cancel();
this.renderTask = null;
}
this.renderingState = RenderingStates.INITIAL;
this.resume = null;
if (this.textLayer) {
this.textLayer.cancel();
this.textLayer = null;
}
},
/**
* Called when moved in the parent's container.
*/
updatePosition: function PDFPageView_updatePosition() {
if (this.textLayer) {
this.textLayer.render(TEXT_LAYER_RENDER_DELAY);
}
},
cssTransform: function PDFPageView_transform(canvas, redrawAnnotations) {
var CustomStyle = pdfjsLib.CustomStyle;
// Scale canvas, canvas wrapper, and page container.
var width = this.viewport.width;
var height = this.viewport.height;
var div = this.div;
canvas.style.width = canvas.parentNode.style.width = div.style.width = Math.floor(width) + 'px';
canvas.style.height = canvas.parentNode.style.height = div.style.height = Math.floor(height) + 'px';
// The canvas may have been originally rotated, rotate relative to that.
var relativeRotation = this.viewport.rotation - canvas._viewport.rotation;
var absRotation = Math.abs(relativeRotation);
var scaleX = 1, scaleY = 1;
if (absRotation === 90 || absRotation === 270) {
// Scale x and y because of the rotation.
scaleX = height / width;
scaleY = width / height;
}
var cssTransform = 'rotate(' + relativeRotation + 'deg) ' + 'scale(' + scaleX + ',' + scaleY + ')';
CustomStyle.setProp('transform', canvas, cssTransform);
if (this.textLayer) {
// Rotating the text layer is more complicated since the divs inside the
// the text layer are rotated.
// TODO: This could probably be simplified by drawing the text layer in
// one orientation then rotating overall.
var textLayerViewport = this.textLayer.viewport;
var textRelativeRotation = this.viewport.rotation - textLayerViewport.rotation;
var textAbsRotation = Math.abs(textRelativeRotation);
var scale = width / textLayerViewport.width;
if (textAbsRotation === 90 || textAbsRotation === 270) {
scale = width / textLayerViewport.height;
}
var textLayerDiv = this.textLayer.textLayerDiv;
var transX, transY;
switch (textAbsRotation) {
case 0:
transX = transY = 0;
break;
case 90:
transX = 0;
transY = '-' + textLayerDiv.style.height;
break;
case 180:
transX = '-' + textLayerDiv.style.width;
transY = '-' + textLayerDiv.style.height;
break;
case 270:
transX = '-' + textLayerDiv.style.width;
transY = 0;
break;
default:
console.error('Bad rotation value.');
break;
}
CustomStyle.setProp('transform', textLayerDiv, 'rotate(' + textAbsRotation + 'deg) ' + 'scale(' + scale + ', ' + scale + ') ' + 'translate(' + transX + ', ' + transY + ')');
CustomStyle.setProp('transformOrigin', textLayerDiv, '0% 0%');
}
if (redrawAnnotations && this.annotationLayer) {
this.annotationLayer.render(this.viewport, 'display');
}
},
get width() {
return this.viewport.width;
},
get height() {
return this.viewport.height;
},
getPagePoint: function PDFPageView_getPagePoint(x, y) {
return this.viewport.convertToPdfPoint(x, y);
},
draw: function PDFPageView_draw() {
if (this.renderingState !== RenderingStates.INITIAL) {
console.error('Must be in new state before drawing');
this.reset();
}
// Ensure that we reset all state to prevent issues.
this.renderingState = RenderingStates.RUNNING;
var pdfPage = this.pdfPage;
var viewport = this.viewport;
var div = this.div;
// Wrap the canvas so if it has a css transform for highdpi the overflow
// will be hidden in FF.
var canvasWrapper = document.createElement('div');
canvasWrapper.style.width = div.style.width;
canvasWrapper.style.height = div.style.height;
canvasWrapper.classList.add('canvasWrapper');
var canvas = document.createElement('canvas');
canvas.id = 'page' + this.id;
// Keep the canvas hidden until the first draw callback, or until drawing
// is complete when `!this.renderingQueue`, to prevent black flickering.
canvas.setAttribute('hidden', 'hidden');
var isCanvasHidden = true;
canvasWrapper.appendChild(canvas);
if (this.annotationLayer && this.annotationLayer.div) {
// annotationLayer needs to stay on top
div.insertBefore(canvasWrapper, this.annotationLayer.div);
} else {
div.appendChild(canvasWrapper);
}
this.canvas = canvas;
canvas.mozOpaque = true;
var ctx = canvas.getContext('2d', { alpha: false });
var outputScale = getOutputScale(ctx);
this.outputScale = outputScale;
if (pdfjsLib.PDFJS.useOnlyCssZoom) {
var actualSizeViewport = viewport.clone({ scale: CSS_UNITS });
// Use a scale that will make the canvas be the original intended size
// of the page.
outputScale.sx *= actualSizeViewport.width / viewport.width;
outputScale.sy *= actualSizeViewport.height / viewport.height;
outputScale.scaled = true;
}
if (pdfjsLib.PDFJS.maxCanvasPixels > 0) {
var pixelsInViewport = viewport.width * viewport.height;
var maxScale = Math.sqrt(pdfjsLib.PDFJS.maxCanvasPixels / pixelsInViewport);
if (outputScale.sx > maxScale || outputScale.sy > maxScale) {
outputScale.sx = maxScale;
outputScale.sy = maxScale;
outputScale.scaled = true;
this.hasRestrictedScaling = true;
} else {
this.hasRestrictedScaling = false;
}
}
var sfx = approximateFraction(outputScale.sx);
var sfy = approximateFraction(outputScale.sy);
canvas.width = roundToDivide(viewport.width * outputScale.sx, sfx[0]);
canvas.height = roundToDivide(viewport.height * outputScale.sy, sfy[0]);
canvas.style.width = roundToDivide(viewport.width, sfx[1]) + 'px';
canvas.style.height = roundToDivide(viewport.height, sfy[1]) + 'px';
// Add the viewport so it's known what it was originally drawn with.
canvas._viewport = viewport;
var textLayerDiv = null;
var textLayer = null;
if (this.textLayerFactory) {
textLayerDiv = document.createElement('div');
textLayerDiv.className = 'textLayer';
textLayerDiv.style.width = canvasWrapper.style.width;
textLayerDiv.style.height = canvasWrapper.style.height;
if (this.annotationLayer && this.annotationLayer.div) {
// annotationLayer needs to stay on top
div.insertBefore(textLayerDiv, this.annotationLayer.div);
} else {
div.appendChild(textLayerDiv);
}
textLayer = this.textLayerFactory.createTextLayerBuilder(textLayerDiv, this.id - 1, this.viewport, this.enhanceTextSelection);
}
this.textLayer = textLayer;
var resolveRenderPromise, rejectRenderPromise;
var promise = new Promise(function (resolve, reject) {
resolveRenderPromise = resolve;
rejectRenderPromise = reject;
});
// Rendering area
var self = this;
function pageViewDrawCallback(error) {
// The renderTask may have been replaced by a new one, so only remove
// the reference to the renderTask if it matches the one that is
// triggering this callback.
if (renderTask === self.renderTask) {
self.renderTask = null;
}
if (error === 'cancelled') {
rejectRenderPromise(error);
return;
}
self.renderingState = RenderingStates.FINISHED;
if (isCanvasHidden) {
self.canvas.removeAttribute('hidden');
isCanvasHidden = false;
}
if (self.loadingIconDiv) {
div.removeChild(self.loadingIconDiv);
delete self.loadingIconDiv;
}
if (self.zoomLayer) {
// Zeroing the width and height causes Firefox to release graphics
// resources immediately, which can greatly reduce memory consumption.
var zoomLayerCanvas = self.zoomLayer.firstChild;
zoomLayerCanvas.width = 0;
zoomLayerCanvas.height = 0;
if (div.contains(self.zoomLayer)) {
// Prevent "Node was not found" errors if the `zoomLayer` was
// already removed. This may occur intermittently if the scale
// changes many times in very quick succession.
div.removeChild(self.zoomLayer);
}
self.zoomLayer = null;
}
self.error = error;
self.stats = pdfPage.stats;
if (self.onAfterDraw) {
self.onAfterDraw();
}
self.eventBus.dispatch('pagerendered', {
source: self,
pageNumber: self.id,
cssTransform: false
});
if (!error) {
resolveRenderPromise(undefined);
} else {
rejectRenderPromise(error);
}
}
var renderContinueCallback = null;
if (this.renderingQueue) {
renderContinueCallback = function renderContinueCallback(cont) {
if (!self.renderingQueue.isHighestPriority(self)) {
self.renderingState = RenderingStates.PAUSED;
self.resume = function resumeCallback() {
self.renderingState = RenderingStates.RUNNING;
cont();
};
return;
}
if (isCanvasHidden) {
self.canvas.removeAttribute('hidden');
isCanvasHidden = false;
}
cont();
};
}
var transform = !outputScale.scaled ? null : [
outputScale.sx,
0,
0,
outputScale.sy,
0,
0
];
var renderContext = {
canvasContext: ctx,
transform: transform,
viewport: this.viewport,
renderInteractiveForms: this.renderInteractiveForms
};
// intent: 'default', // === 'display'
var renderTask = this.renderTask = this.pdfPage.render(renderContext);
renderTask.onContinue = renderContinueCallback;
this.renderTask.promise.then(function pdfPageRenderCallback() {
pageViewDrawCallback(null);
if (textLayer) {
self.pdfPage.getTextContent({ normalizeWhitespace: true }).then(function textContentResolved(textContent) {
textLayer.setTextContent(textContent);
textLayer.render(TEXT_LAYER_RENDER_DELAY);
});
}
}, function pdfPageRenderError(error) {
pageViewDrawCallback(error);
});
if (this.annotationLayerFactory) {
if (!this.annotationLayer) {
this.annotationLayer = this.annotationLayerFactory.createAnnotationLayerBuilder(div, this.pdfPage, this.renderInteractiveForms);
}
this.annotationLayer.render(this.viewport, 'display');
}
div.setAttribute('data-loaded', true);
if (self.onBeforeDraw) {
self.onBeforeDraw();
}
return promise;
},
/**
* @param {string|null} label
*/
setPageLabel: function PDFView_setPageLabel(label) {
this.pageLabel = typeof label === 'string' ? label : null;
if (this.pageLabel !== null) {
this.div.setAttribute('data-page-label', this.pageLabel);
} else {
this.div.removeAttribute('data-page-label');
}
}
};
return PDFPageView;
}();
exports.PDFPageView = PDFPageView;
}));
(function (root, factory) {
factory(root.pdfjsWebTextLayerBuilder = {}, root.pdfjsWebDOMEvents, root.pdfjsWebPDFJS);
}(this, function (exports, domEvents, pdfjsLib) {
var EXPAND_DIVS_TIMEOUT = 300;
// ms
/**
* @typedef {Object} TextLayerBuilderOptions
* @property {HTMLDivElement} textLayerDiv - The text layer container.
* @property {EventBus} eventBus - The application event bus.
* @property {number} pageIndex - The page index.
* @property {PageViewport} viewport - The viewport of the text layer.
* @property {PDFFindController} findController
* @property {boolean} enhanceTextSelection - Option to turn on improved
* text selection.
*/
/**
* TextLayerBuilder provides text-selection functionality for the PDF.
* It does this by creating overlay divs over the PDF text. These divs
* contain text that matches the PDF text they are overlaying. This object
* also provides a way to highlight text that is being searched for.
* @class
*/
var TextLayerBuilder = function TextLayerBuilderClosure() {
function TextLayerBuilder(options) {
this.textLayerDiv = options.textLayerDiv;
this.eventBus = options.eventBus || domEvents.getGlobalEventBus();
this.textContent = null;
this.renderingDone = false;
this.pageIdx = options.pageIndex;
this.pageNumber = this.pageIdx + 1;
this.matches = [];
this.viewport = options.viewport;
this.textDivs = [];
this.findController = options.findController || null;
this.textLayerRenderTask = null;
this.enhanceTextSelection = options.enhanceTextSelection;
this._bindMouse();
}
TextLayerBuilder.prototype = {
/**
* @private
*/
_finishRendering: function TextLayerBuilder_finishRendering() {
this.renderingDone = true;
if (!this.enhanceTextSelection) {
var endOfContent = document.createElement('div');
endOfContent.className = 'endOfContent';
this.textLayerDiv.appendChild(endOfContent);
}
this.eventBus.dispatch('textlayerrendered', {
source: this,
pageNumber: this.pageNumber,
numTextDivs: this.textDivs.length
});
},
/**
* Renders the text layer.
* @param {number} timeout (optional) if specified, the rendering waits
* for specified amount of ms.
*/
render: function TextLayerBuilder_render(timeout) {
if (!this.textContent || this.renderingDone) {
return;
}
this.cancel();
this.textDivs = [];
var textLayerFrag = document.createDocumentFragment();
this.textLayerRenderTask = pdfjsLib.renderTextLayer({
textContent: this.textContent,
container: textLayerFrag,
viewport: this.viewport,
textDivs: this.textDivs,
timeout: timeout,
enhanceTextSelection: this.enhanceTextSelection
});
this.textLayerRenderTask.promise.then(function () {
this.textLayerDiv.appendChild(textLayerFrag);
this._finishRendering();
this.updateMatches();
}.bind(this), function (reason) {
});
},
/**
* Cancels rendering of the text layer.
*/
cancel: function TextLayerBuilder_cancel() {
if (this.textLayerRenderTask) {
this.textLayerRenderTask.cancel();
this.textLayerRenderTask = null;
}
},
setTextContent: function TextLayerBuilder_setTextContent(textContent) {
this.cancel();
this.textContent = textContent;
},
convertMatches: function TextLayerBuilder_convertMatches(matches, matchesLength) {
var i = 0;
var iIndex = 0;
var bidiTexts = this.textContent.items;
var end = bidiTexts.length - 1;
var queryLen = this.findController === null ? 0 : this.findController.state.query.length;
var ret = [];
if (!matches) {
return ret;
}
for (var m = 0, len = matches.length; m < len; m++) {
// Calculate the start position.
var matchIdx = matches[m];
// Loop over the divIdxs.
while (i !== end && matchIdx >= iIndex + bidiTexts[i].str.length) {
iIndex += bidiTexts[i].str.length;
i++;
}
if (i === bidiTexts.length) {
console.error('Could not find a matching mapping');
}
var match = {
begin: {
divIdx: i,
offset: matchIdx - iIndex
}
};
// Calculate the end position.
if (matchesLength) {
// multiterm search
matchIdx += matchesLength[m];
} else {
// phrase search
matchIdx += queryLen;
}
// Somewhat the same array as above, but use > instead of >= to get
// the end position right.
while (i !== end && matchIdx > iIndex + bidiTexts[i].str.length) {
iIndex += bidiTexts[i].str.length;
i++;
}
match.end = {
divIdx: i,
offset: matchIdx - iIndex
};
ret.push(match);
}
return ret;
},
renderMatches: function TextLayerBuilder_renderMatches(matches) {
// Early exit if there is nothing to render.
if (matches.length === 0) {
return;
}
var bidiTexts = this.textContent.items;
var textDivs = this.textDivs;
var prevEnd = null;
var pageIdx = this.pageIdx;
var isSelectedPage = this.findController === null ? false : pageIdx === this.findController.selected.pageIdx;
var selectedMatchIdx = this.findController === null ? -1 : this.findController.selected.matchIdx;
var highlightAll = this.findController === null ? false : this.findController.state.highlightAll;
var infinity = {
divIdx: -1,
offset: undefined
};
function beginText(begin, className) {
var divIdx = begin.divIdx;
textDivs[divIdx].textContent = '';
appendTextToDiv(divIdx, 0, begin.offset, className);
}
function appendTextToDiv(divIdx, fromOffset, toOffset, className) {
var div = textDivs[divIdx];
var content = bidiTexts[divIdx].str.substring(fromOffset, toOffset);
var node = document.createTextNode(content);
if (className) {
var span = document.createElement('span');
span.className = className;
span.appendChild(node);
div.appendChild(span);
return;
}
div.appendChild(node);
}
var i0 = selectedMatchIdx, i1 = i0 + 1;
if (highlightAll) {
i0 = 0;
i1 = matches.length;
} else if (!isSelectedPage) {
// Not highlighting all and this isn't the selected page, so do nothing.
return;
}
for (var i = i0; i < i1; i++) {
var match = matches[i];
var begin = match.begin;
var end = match.end;
var isSelected = isSelectedPage && i === selectedMatchIdx;
var highlightSuffix = isSelected ? ' selected' : '';
if (this.findController) {
this.findController.updateMatchPosition(pageIdx, i, textDivs, begin.divIdx);
}
// Match inside new div.
if (!prevEnd || begin.divIdx !== prevEnd.divIdx) {
// If there was a previous div, then add the text at the end.
if (prevEnd !== null) {
appendTextToDiv(prevEnd.divIdx, prevEnd.offset, infinity.offset);
}
// Clear the divs and set the content until the starting point.
beginText(begin);
} else {
appendTextToDiv(prevEnd.divIdx, prevEnd.offset, begin.offset);
}
if (begin.divIdx === end.divIdx) {
appendTextToDiv(begin.divIdx, begin.offset, end.offset, 'highlight' + highlightSuffix);
} else {
appendTextToDiv(begin.divIdx, begin.offset, infinity.offset, 'highlight begin' + highlightSuffix);
for (var n0 = begin.divIdx + 1, n1 = end.divIdx; n0 < n1; n0++) {
textDivs[n0].className = 'highlight middle' + highlightSuffix;
}
beginText(end, 'highlight end' + highlightSuffix);
}
prevEnd = end;
}
if (prevEnd) {
appendTextToDiv(prevEnd.divIdx, prevEnd.offset, infinity.offset);
}
},
updateMatches: function TextLayerBuilder_updateMatches() {
// Only show matches when all rendering is done.
if (!this.renderingDone) {
return;
}
// Clear all matches.
var matches = this.matches;
var textDivs = this.textDivs;
var bidiTexts = this.textContent.items;
var clearedUntilDivIdx = -1;
// Clear all current matches.
for (var i = 0, len = matches.length; i < len; i++) {
var match = matches[i];
var begin = Math.max(clearedUntilDivIdx, match.begin.divIdx);
for (var n = begin, end = match.end.divIdx; n <= end; n++) {
var div = textDivs[n];
div.textContent = bidiTexts[n].str;
div.className = '';
}
clearedUntilDivIdx = match.end.divIdx + 1;
}
if (this.findController === null || !this.findController.active) {
return;
}
// Convert the matches on the page controller into the match format
// used for the textLayer.
var pageMatches, pageMatchesLength;
if (this.findController !== null) {
pageMatches = this.findController.pageMatches[this.pageIdx] || null;
pageMatchesLength = this.findController.pageMatchesLength ? this.findController.pageMatchesLength[this.pageIdx] || null : null;
}
this.matches = this.convertMatches(pageMatches, pageMatchesLength);
this.renderMatches(this.matches);
},
/**
* Fixes text selection: adds additional div where mouse was clicked.
* This reduces flickering of the content if mouse slowly dragged down/up.
* @private
*/
_bindMouse: function TextLayerBuilder_bindMouse() {
var div = this.textLayerDiv;
var self = this;
var expandDivsTimer = null;
div.addEventListener('mousedown', function (e) {
if (self.enhanceTextSelection && self.textLayerRenderTask) {
self.textLayerRenderTask.expandTextDivs(true);
if (expandDivsTimer) {
clearTimeout(expandDivsTimer);
expandDivsTimer = null;
}
return;
}
var end = div.querySelector('.endOfContent');
if (!end) {
return;
}
// On non-Firefox browsers, the selection will feel better if the height
// of the endOfContent div will be adjusted to start at mouse click
// location -- this will avoid flickering when selections moves up.
// However it does not work when selection started on empty space.
var adjustTop = e.target !== div;
adjustTop = adjustTop && window.getComputedStyle(end).getPropertyValue('-moz-user-select') !== 'none';
if (adjustTop) {
var divBounds = div.getBoundingClientRect();
var r = Math.max(0, (e.pageY - divBounds.top) / divBounds.height);
end.style.top = (r * 100).toFixed(2) + '%';
}
end.classList.add('active');
});
div.addEventListener('mouseup', function (e) {
if (self.enhanceTextSelection && self.textLayerRenderTask) {
expandDivsTimer = setTimeout(function () {
if (self.textLayerRenderTask) {
self.textLayerRenderTask.expandTextDivs(false);
}
expandDivsTimer = null;
}, EXPAND_DIVS_TIMEOUT);
return;
}
var end = div.querySelector('.endOfContent');
if (!end) {
return;
}
end.style.top = '';
end.classList.remove('active');
});
}
};
return TextLayerBuilder;
}();
/**
* @constructor
* @implements IPDFTextLayerFactory
*/
function DefaultTextLayerFactory() {
}
DefaultTextLayerFactory.prototype = {
/**
* @param {HTMLDivElement} textLayerDiv
* @param {number} pageIndex
* @param {PageViewport} viewport
* @param {boolean} enhanceTextSelection
* @returns {TextLayerBuilder}
*/
createTextLayerBuilder: function (textLayerDiv, pageIndex, viewport, enhanceTextSelection) {
return new TextLayerBuilder({
textLayerDiv: textLayerDiv,
pageIndex: pageIndex,
viewport: viewport,
enhanceTextSelection: enhanceTextSelection
});
}
};
exports.TextLayerBuilder = TextLayerBuilder;
exports.DefaultTextLayerFactory = DefaultTextLayerFactory;
}));
(function (root, factory) {
factory(root.pdfjsWebAnnotationLayerBuilder = {}, root.pdfjsWebUIUtils, root.pdfjsWebPDFLinkService, root.pdfjsWebPDFJS);
}(this, function (exports, uiUtils, pdfLinkService, pdfjsLib) {
var mozL10n = uiUtils.mozL10n;
var SimpleLinkService = pdfLinkService.SimpleLinkService;
/**
* @typedef {Object} AnnotationLayerBuilderOptions
* @property {HTMLDivElement} pageDiv
* @property {PDFPage} pdfPage
* @property {boolean} renderInteractiveForms
* @property {IPDFLinkService} linkService
* @property {DownloadManager} downloadManager
*/
/**
* @class
*/
var AnnotationLayerBuilder = function AnnotationLayerBuilderClosure() {
/**
* @param {AnnotationLayerBuilderOptions} options
* @constructs AnnotationLayerBuilder
*/
function AnnotationLayerBuilder(options) {
this.pageDiv = options.pageDiv;
this.pdfPage = options.pdfPage;
this.renderInteractiveForms = options.renderInteractiveForms;
this.linkService = options.linkService;
this.downloadManager = options.downloadManager;
this.div = null;
}
AnnotationLayerBuilder.prototype = /** @lends AnnotationLayerBuilder.prototype */
{
/**
* @param {PageViewport} viewport
* @param {string} intent (default value is 'display')
*/
render: function AnnotationLayerBuilder_render(viewport, intent) {
var self = this;
var parameters = { intent: intent === undefined ? 'display' : intent };
this.pdfPage.getAnnotations(parameters).then(function (annotations) {
viewport = viewport.clone({ dontFlip: true });
parameters = {
viewport: viewport,
div: self.div,
annotations: annotations,
page: self.pdfPage,
renderInteractiveForms: self.renderInteractiveForms,
linkService: self.linkService,
downloadManager: self.downloadManager
};
if (self.div) {
// If an annotationLayer already exists, refresh its children's
// transformation matrices.
pdfjsLib.AnnotationLayer.update(parameters);
} else {
// Create an annotation layer div and render the annotations
// if there is at least one annotation.
if (annotations.length === 0) {
return;
}
self.div = document.createElement('div');
self.div.className = 'annotationLayer';
self.pageDiv.appendChild(self.div);
parameters.div = self.div;
pdfjsLib.AnnotationLayer.render(parameters);
if (typeof mozL10n !== 'undefined') {
mozL10n.translate(self.div);
}
}
});
},
hide: function AnnotationLayerBuilder_hide() {
if (!this.div) {
return;
}
this.div.setAttribute('hidden', 'true');
}
};
return AnnotationLayerBuilder;
}();
/**
* @constructor
* @implements IPDFAnnotationLayerFactory
*/
function DefaultAnnotationLayerFactory() {
}
DefaultAnnotationLayerFactory.prototype = {
/**
* @param {HTMLDivElement} pageDiv
* @param {PDFPage} pdfPage
* @param {boolean} renderInteractiveForms
* @returns {AnnotationLayerBuilder}
*/
createAnnotationLayerBuilder: function (pageDiv, pdfPage, renderInteractiveForms) {
return new AnnotationLayerBuilder({
pageDiv: pageDiv,
pdfPage: pdfPage,
renderInteractiveForms: renderInteractiveForms,
linkService: new SimpleLinkService()
});
}
};
exports.AnnotationLayerBuilder = AnnotationLayerBuilder;
exports.DefaultAnnotationLayerFactory = DefaultAnnotationLayerFactory;
}));
(function (root, factory) {
factory(root.pdfjsWebPDFViewer = {}, root.pdfjsWebUIUtils, root.pdfjsWebPDFPageView, root.pdfjsWebPDFRenderingQueue, root.pdfjsWebTextLayerBuilder, root.pdfjsWebAnnotationLayerBuilder, root.pdfjsWebPDFLinkService, root.pdfjsWebDOMEvents, root.pdfjsWebPDFJS);
}(this, function (exports, uiUtils, pdfPageView, pdfRenderingQueue, textLayerBuilder, annotationLayerBuilder, pdfLinkService, domEvents, pdfjsLib) {
var UNKNOWN_SCALE = uiUtils.UNKNOWN_SCALE;
var SCROLLBAR_PADDING = uiUtils.SCROLLBAR_PADDING;
var VERTICAL_PADDING = uiUtils.VERTICAL_PADDING;
var MAX_AUTO_SCALE = uiUtils.MAX_AUTO_SCALE;
var CSS_UNITS = uiUtils.CSS_UNITS;
var DEFAULT_SCALE = uiUtils.DEFAULT_SCALE;
var DEFAULT_SCALE_VALUE = uiUtils.DEFAULT_SCALE_VALUE;
var scrollIntoView = uiUtils.scrollIntoView;
var watchScroll = uiUtils.watchScroll;
var getVisibleElements = uiUtils.getVisibleElements;
var PDFPageView = pdfPageView.PDFPageView;
var RenderingStates = pdfRenderingQueue.RenderingStates;
var PDFRenderingQueue = pdfRenderingQueue.PDFRenderingQueue;
var TextLayerBuilder = textLayerBuilder.TextLayerBuilder;
var AnnotationLayerBuilder = annotationLayerBuilder.AnnotationLayerBuilder;
var SimpleLinkService = pdfLinkService.SimpleLinkService;
var PresentationModeState = {
UNKNOWN: 0,
NORMAL: 1,
CHANGING: 2,
FULLSCREEN: 3
};
var DEFAULT_CACHE_SIZE = 10;
/**
* @typedef {Object} PDFViewerOptions
* @property {HTMLDivElement} container - The container for the viewer element.
* @property {HTMLDivElement} viewer - (optional) The viewer element.
* @property {EventBus} eventBus - The application event bus.
* @property {IPDFLinkService} linkService - The navigation/linking service.
* @property {DownloadManager} downloadManager - (optional) The download
* manager component.
* @property {PDFRenderingQueue} renderingQueue - (optional) The rendering
* queue object.
* @property {boolean} removePageBorders - (optional) Removes the border shadow
* around the pages. The default is false.
* @property {boolean} enhanceTextSelection - (optional) Enables the improved
* text selection behaviour. The default is `false`.
* @property {boolean} renderInteractiveForms - (optional) Enables rendering of
* interactive form elements. The default is `false`.
*/
/**
* Simple viewer control to display PDF content/pages.
* @class
* @implements {IRenderableView}
*/
var PDFViewer = function pdfViewer() {
function PDFPageViewBuffer(size) {
var data = [];
this.push = function cachePush(view) {
var i = data.indexOf(view);
if (i >= 0) {
data.splice(i, 1);
}
data.push(view);
if (data.length > size) {
data.shift().destroy();
}
};
this.resize = function (newSize) {
size = newSize;
while (data.length > size) {
data.shift().destroy();
}
};
}
function isSameScale(oldScale, newScale) {
if (newScale === oldScale) {
return true;
}
if (Math.abs(newScale - oldScale) < 1e-15) {
// Prevent unnecessary re-rendering of all pages when the scale
// changes only because of limited numerical precision.
return true;
}
return false;
}
/**
* @constructs PDFViewer
* @param {PDFViewerOptions} options
*/
function PDFViewer(options) {
this.container = options.container;
this.viewer = options.viewer || options.container.firstElementChild;
this.eventBus = options.eventBus || domEvents.getGlobalEventBus();
this.linkService = options.linkService || new SimpleLinkService();
this.downloadManager = options.downloadManager || null;
this.removePageBorders = options.removePageBorders || false;
this.enhanceTextSelection = options.enhanceTextSelection || false;
this.renderInteractiveForms = options.renderInteractiveForms || false;
this.defaultRenderingQueue = !options.renderingQueue;
if (this.defaultRenderingQueue) {
// Custom rendering queue is not specified, using default one
this.renderingQueue = new PDFRenderingQueue();
this.renderingQueue.setViewer(this);
} else {
this.renderingQueue = options.renderingQueue;
}
this.scroll = watchScroll(this.container, this._scrollUpdate.bind(this));
this.presentationModeState = PresentationModeState.UNKNOWN;
this._resetView();
if (this.removePageBorders) {
this.viewer.classList.add('removePageBorders');
}
}
PDFViewer.prototype = /** @lends PDFViewer.prototype */
{
get pagesCount() {
return this._pages.length;
},
getPageView: function (index) {
return this._pages[index];
},
/**
* @returns {boolean} true if all {PDFPageView} objects are initialized.
*/
get pageViewsReady() {
return this._pageViewsReady;
},
/**
* @returns {number}
*/
get currentPageNumber() {
return this._currentPageNumber;
},
/**
* @param {number} val - The page number.
*/
set currentPageNumber(val) {
if ((val | 0) !== val) {
// Ensure that `val` is an integer.
throw new Error('Invalid page number.');
}
if (!this.pdfDocument) {
this._currentPageNumber = val;
return;
}
// The intent can be to just reset a scroll position and/or scale.
this._setCurrentPageNumber(val, /* resetCurrentPageView = */
true);
},
/**
* @private
*/
_setCurrentPageNumber: function PDFViewer_setCurrentPageNumber(val, resetCurrentPageView) {
if (this._currentPageNumber === val) {
if (resetCurrentPageView) {
this._resetCurrentPageView();
}
return;
}
if (!(0 < val && val <= this.pagesCount)) {
console.error('PDFViewer_setCurrentPageNumber: "' + val + '" is out of bounds.');
return;
}
var arg = {
source: this,
pageNumber: val,
pageLabel: this._pageLabels && this._pageLabels[val - 1]
};
this._currentPageNumber = val;
this.eventBus.dispatch('pagechanging', arg);
this.eventBus.dispatch('pagechange', arg);
if (resetCurrentPageView) {
this._resetCurrentPageView();
}
},
/**
* @returns {string|null} Returns the current page label,
* or `null` if no page labels exist.
*/
get currentPageLabel() {
return this._pageLabels && this._pageLabels[this._currentPageNumber - 1];
},
/**
* @param {string} val - The page label.
*/
set currentPageLabel(val) {
var pageNumber = val | 0;
// Fallback page number.
if (this._pageLabels) {
var i = this._pageLabels.indexOf(val);
if (i >= 0) {
pageNumber = i + 1;
}
}
this.currentPageNumber = pageNumber;
},
/**
* @returns {number}
*/
get currentScale() {
return this._currentScale !== UNKNOWN_SCALE ? this._currentScale : DEFAULT_SCALE;
},
/**
* @param {number} val - Scale of the pages in percents.
*/
set currentScale(val) {
if (isNaN(val)) {
throw new Error('Invalid numeric scale');
}
if (!this.pdfDocument) {
this._currentScale = val;
this._currentScaleValue = val !== UNKNOWN_SCALE ? val.toString() : null;
return;
}
this._setScale(val, false);
},
/**
* @returns {string}
*/
get currentScaleValue() {
return this._currentScaleValue;
},
/**
* @param val - The scale of the pages (in percent or predefined value).
*/
set currentScaleValue(val) {
if (!this.pdfDocument) {
this._currentScale = isNaN(val) ? UNKNOWN_SCALE : val;
this._currentScaleValue = val.toString();
return;
}
this._setScale(val, false);
},
/**
* @returns {number}
*/
get pagesRotation() {
return this._pagesRotation;
},
/**
* @param {number} rotation - The rotation of the pages (0, 90, 180, 270).
*/
set pagesRotation(rotation) {
if (!(typeof rotation === 'number' && rotation % 90 === 0)) {
throw new Error('Invalid pages rotation angle.');
}
this._pagesRotation = rotation;
if (!this.pdfDocument) {
return;
}
for (var i = 0, l = this._pages.length; i < l; i++) {
var pageView = this._pages[i];
pageView.update(pageView.scale, rotation);
}
this._setScale(this._currentScaleValue, true);
if (this.defaultRenderingQueue) {
this.update();
}
},
/**
* @param pdfDocument {PDFDocument}
*/
setDocument: function (pdfDocument) {
if (this.pdfDocument) {
this._cancelRendering();
this._resetView();
}
this.pdfDocument = pdfDocument;
if (!pdfDocument) {
return;
}
var pagesCount = pdfDocument.numPages;
var self = this;
var resolvePagesPromise;
var pagesPromise = new Promise(function (resolve) {
resolvePagesPromise = resolve;
});
this.pagesPromise = pagesPromise;
pagesPromise.then(function () {
self._pageViewsReady = true;
self.eventBus.dispatch('pagesloaded', {
source: self,
pagesCount: pagesCount
});
});
var isOnePageRenderedResolved = false;
var resolveOnePageRendered = null;
var onePageRendered = new Promise(function (resolve) {
resolveOnePageRendered = resolve;
});
this.onePageRendered = onePageRendered;
var bindOnAfterAndBeforeDraw = function (pageView) {
pageView.onBeforeDraw = function pdfViewLoadOnBeforeDraw() {
// Add the page to the buffer at the start of drawing. That way it can
// be evicted from the buffer and destroyed even if we pause its
// rendering.
self._buffer.push(this);
};
pageView.onAfterDraw = function pdfViewLoadOnAfterDraw() {
if (!isOnePageRenderedResolved) {
isOnePageRenderedResolved = true;
resolveOnePageRendered();
}
};
};
var firstPagePromise = pdfDocument.getPage(1);
this.firstPagePromise = firstPagePromise;
// Fetch a single page so we can get a viewport that will be the default
// viewport for all pages
return firstPagePromise.then(function (pdfPage) {
var scale = this.currentScale;
var viewport = pdfPage.getViewport(scale * CSS_UNITS);
for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
var textLayerFactory = null;
if (!pdfjsLib.PDFJS.disableTextLayer) {
textLayerFactory = this;
}
var pageView = new PDFPageView({
container: this.viewer,
eventBus: this.eventBus,
id: pageNum,
scale: scale,
defaultViewport: viewport.clone(),
renderingQueue: this.renderingQueue,
textLayerFactory: textLayerFactory,
annotationLayerFactory: this,
enhanceTextSelection: this.enhanceTextSelection,
renderInteractiveForms: this.renderInteractiveForms
});
bindOnAfterAndBeforeDraw(pageView);
this._pages.push(pageView);
}
var linkService = this.linkService;
// Fetch all the pages since the viewport is needed before printing
// starts to create the correct size canvas. Wait until one page is
// rendered so we don't tie up too many resources early on.
onePageRendered.then(function () {
if (!pdfjsLib.PDFJS.disableAutoFetch) {
var getPagesLeft = pagesCount;
for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
pdfDocument.getPage(pageNum).then(function (pageNum, pdfPage) {
var pageView = self._pages[pageNum - 1];
if (!pageView.pdfPage) {
pageView.setPdfPage(pdfPage);
}
linkService.cachePageRef(pageNum, pdfPage.ref);
getPagesLeft--;
if (!getPagesLeft) {
resolvePagesPromise();
}
}.bind(null, pageNum));
}
} else {
// XXX: Printing is semi-broken with auto fetch disabled.
resolvePagesPromise();
}
});
self.eventBus.dispatch('pagesinit', { source: self });
if (this.defaultRenderingQueue) {
this.update();
}
if (this.findController) {
this.findController.resolveFirstPage();
}
}.bind(this));
},
/**
* @param {Array|null} labels
*/
setPageLabels: function PDFViewer_setPageLabels(labels) {
if (!this.pdfDocument) {
return;
}
if (!labels) {
this._pageLabels = null;
} else if (!(labels instanceof Array && this.pdfDocument.numPages === labels.length)) {
this._pageLabels = null;
console.error('PDFViewer_setPageLabels: Invalid page labels.');
} else {
this._pageLabels = labels;
}
// Update all the `PDFPageView` instances.
for (var i = 0, ii = this._pages.length; i < ii; i++) {
var pageView = this._pages[i];
var label = this._pageLabels && this._pageLabels[i];
pageView.setPageLabel(label);
}
},
_resetView: function () {
this._pages = [];
this._currentPageNumber = 1;
this._currentScale = UNKNOWN_SCALE;
this._currentScaleValue = null;
this._pageLabels = null;
this._buffer = new PDFPageViewBuffer(DEFAULT_CACHE_SIZE);
this._location = null;
this._pagesRotation = 0;
this._pagesRequests = [];
this._pageViewsReady = false;
// Remove the pages from the DOM.
this.viewer.textContent = '';
},
_scrollUpdate: function PDFViewer_scrollUpdate() {
if (this.pagesCount === 0) {
return;
}
this.update();
for (var i = 0, ii = this._pages.length; i < ii; i++) {
this._pages[i].updatePosition();
}
},
_setScaleDispatchEvent: function pdfViewer_setScaleDispatchEvent(newScale, newValue, preset) {
var arg = {
source: this,
scale: newScale,
presetValue: preset ? newValue : undefined
};
this.eventBus.dispatch('scalechanging', arg);
this.eventBus.dispatch('scalechange', arg);
},
_setScaleUpdatePages: function pdfViewer_setScaleUpdatePages(newScale, newValue, noScroll, preset) {
this._currentScaleValue = newValue.toString();
if (isSameScale(this._currentScale, newScale)) {
if (preset) {
this._setScaleDispatchEvent(newScale, newValue, true);
}
return;
}
for (var i = 0, ii = this._pages.length; i < ii; i++) {
this._pages[i].update(newScale);
}
this._currentScale = newScale;
if (!noScroll) {
var page = this._currentPageNumber, dest;
if (this._location && !pdfjsLib.PDFJS.ignoreCurrentPositionOnZoom && !(this.isInPresentationMode || this.isChangingPresentationMode)) {
page = this._location.pageNumber;
dest = [
null,
{ name: 'XYZ' },
this._location.left,
this._location.top,
null
];
}
this.scrollPageIntoView({
pageNumber: page,
destArray: dest,
allowNegativeOffset: true
});
}
this._setScaleDispatchEvent(newScale, newValue, preset);
if (this.defaultRenderingQueue) {
this.update();
}
},
_setScale: function PDFViewer_setScale(value, noScroll) {
var scale = parseFloat(value);
if (scale > 0) {
this._setScaleUpdatePages(scale, value, noScroll, false);
} else {
var currentPage = this._pages[this._currentPageNumber - 1];
if (!currentPage) {
return;
}
var hPadding = this.isInPresentationMode || this.removePageBorders ? 0 : SCROLLBAR_PADDING;
var vPadding = this.isInPresentationMode || this.removePageBorders ? 0 : VERTICAL_PADDING;
var pageWidthScale = (this.container.clientWidth - hPadding) / currentPage.width * currentPage.scale;
var pageHeightScale = (this.container.clientHeight - vPadding) / currentPage.height * currentPage.scale;
switch (value) {
case 'page-actual':
scale = 1;
break;
case 'page-width':
scale = pageWidthScale;
break;
case 'page-height':
scale = pageHeightScale;
break;
case 'page-fit':
scale = Math.min(pageWidthScale, pageHeightScale);
break;
case 'auto':
var isLandscape = currentPage.width > currentPage.height;
// For pages in landscape mode, fit the page height to the viewer
// *unless* the page would thus become too wide to fit horizontally.
var horizontalScale = isLandscape ? Math.min(pageHeightScale, pageWidthScale) : pageWidthScale;
scale = Math.min(MAX_AUTO_SCALE, horizontalScale);
break;
default:
console.error('PDFViewer_setScale: "' + value + '" is an unknown zoom value.');
return;
}
this._setScaleUpdatePages(scale, value, noScroll, true);
}
},
/**
* Refreshes page view: scrolls to the current page and updates the scale.
* @private
*/
_resetCurrentPageView: function () {
if (this.isInPresentationMode) {
// Fixes the case when PDF has different page sizes.
this._setScale(this._currentScaleValue, true);
}
var pageView = this._pages[this._currentPageNumber - 1];
scrollIntoView(pageView.div);
},
/**
* @typedef ScrollPageIntoViewParameters
* @property {number} pageNumber - The page number.
* @property {Array} destArray - (optional) The original PDF destination
* array, in the format: <page-ref> </XYZ|/FitXXX> <args..>
* @property {boolean} allowNegativeOffset - (optional) Allow negative page
* offsets. The default value is `false`.
*/
/**
* Scrolls page into view.
* @param {ScrollPageIntoViewParameters} params
*/
scrollPageIntoView: function PDFViewer_scrollPageIntoView(params) {
if (!this.pdfDocument) {
return;
}
if (arguments.length > 1 || typeof params === 'number') {
console.warn('Call of scrollPageIntoView() with obsolete signature.');
var paramObj = {};
if (typeof params === 'number') {
paramObj.pageNumber = params;
}
// pageNumber argument was found.
if (arguments[1] instanceof Array) {
paramObj.destArray = arguments[1];
}
// destArray argument was found.
params = paramObj;
}
var pageNumber = params.pageNumber || 0;
var dest = params.destArray || null;
var allowNegativeOffset = params.allowNegativeOffset || false;
if (this.isInPresentationMode || !dest) {
this._setCurrentPageNumber(pageNumber, /* resetCurrentPageView */
true);
return;
}
var pageView = this._pages[pageNumber - 1];
if (!pageView) {
console.error('PDFViewer_scrollPageIntoView: ' + 'Invalid "pageNumber" parameter.');
return;
}
var x = 0, y = 0;
var width = 0, height = 0, widthScale, heightScale;
var changeOrientation = pageView.rotation % 180 === 0 ? false : true;
var pageWidth = (changeOrientation ? pageView.height : pageView.width) / pageView.scale / CSS_UNITS;
var pageHeight = (changeOrientation ? pageView.width : pageView.height) / pageView.scale / CSS_UNITS;
var scale = 0;
switch (dest[1].name) {
case 'XYZ':
x = dest[2];
y = dest[3];
scale = dest[4];
// If x and/or y coordinates are not supplied, default to
// _top_ left of the page (not the obvious bottom left,
// since aligning the bottom of the intended page with the
// top of the window is rarely helpful).
x = x !== null ? x : 0;
y = y !== null ? y : pageHeight;
break;
case 'Fit':
case 'FitB':
scale = 'page-fit';
break;
case 'FitH':
case 'FitBH':
y = dest[2];
scale = 'page-width';
// According to the PDF spec, section 12.3.2.2, a `null` value in the
// parameter should maintain the position relative to the new page.
if (y === null && this._location) {
x = this._location.left;
y = this._location.top;
}
break;
case 'FitV':
case 'FitBV':
x = dest[2];
width = pageWidth;
height = pageHeight;
scale = 'page-height';
break;
case 'FitR':
x = dest[2];
y = dest[3];
width = dest[4] - x;
height = dest[5] - y;
var hPadding = this.removePageBorders ? 0 : SCROLLBAR_PADDING;
var vPadding = this.removePageBorders ? 0 : VERTICAL_PADDING;
widthScale = (this.container.clientWidth - hPadding) / width / CSS_UNITS;
heightScale = (this.container.clientHeight - vPadding) / height / CSS_UNITS;
scale = Math.min(Math.abs(widthScale), Math.abs(heightScale));
break;
default:
console.error('PDFViewer_scrollPageIntoView: \'' + dest[1].name + '\' is not a valid destination type.');
return;
}
if (scale && scale !== this._currentScale) {
this.currentScaleValue = scale;
} else if (this._currentScale === UNKNOWN_SCALE) {
this.currentScaleValue = DEFAULT_SCALE_VALUE;
}
if (scale === 'page-fit' && !dest[4]) {
scrollIntoView(pageView.div);
return;
}
var boundingRect = [
pageView.viewport.convertToViewportPoint(x, y),
pageView.viewport.convertToViewportPoint(x + width, y + height)
];
var left = Math.min(boundingRect[0][0], boundingRect[1][0]);
var top = Math.min(boundingRect[0][1], boundingRect[1][1]);
if (!allowNegativeOffset) {
// Some bad PDF generators will create destinations with e.g. top values
// that exceeds the page height. Ensure that offsets are not negative,
// to prevent a previous page from becoming visible (fixes bug 874482).
left = Math.max(left, 0);
top = Math.max(top, 0);
}
scrollIntoView(pageView.div, {
left: left,
top: top
});
},
_updateLocation: function (firstPage) {
var currentScale = this._currentScale;
var currentScaleValue = this._currentScaleValue;
var normalizedScaleValue = parseFloat(currentScaleValue) === currentScale ? Math.round(currentScale * 10000) / 100 : currentScaleValue;
var pageNumber = firstPage.id;
var pdfOpenParams = '#page=' + pageNumber;
pdfOpenParams += '&zoom=' + normalizedScaleValue;
var currentPageView = this._pages[pageNumber - 1];
var container = this.container;
var topLeft = currentPageView.getPagePoint(container.scrollLeft - firstPage.x, container.scrollTop - firstPage.y);
var intLeft = Math.round(topLeft[0]);
var intTop = Math.round(topLeft[1]);
pdfOpenParams += ',' + intLeft + ',' + intTop;
this._location = {
pageNumber: pageNumber,
scale: normalizedScaleValue,
top: intTop,
left: intLeft,
pdfOpenParams: pdfOpenParams
};
},
update: function PDFViewer_update() {
var visible = this._getVisiblePages();
var visiblePages = visible.views;
if (visiblePages.length === 0) {
return;
}
var suggestedCacheSize = Math.max(DEFAULT_CACHE_SIZE, 2 * visiblePages.length + 1);
this._buffer.resize(suggestedCacheSize);
this.renderingQueue.renderHighestPriority(visible);
var currentId = this._currentPageNumber;
var firstPage = visible.first;
for (var i = 0, ii = visiblePages.length, stillFullyVisible = false; i < ii; ++i) {
var page = visiblePages[i];
if (page.percent < 100) {
break;
}
if (page.id === currentId) {
stillFullyVisible = true;
break;
}
}
if (!stillFullyVisible) {
currentId = visiblePages[0].id;
}
if (!this.isInPresentationMode) {
this._setCurrentPageNumber(currentId);
}
this._updateLocation(firstPage);
this.eventBus.dispatch('updateviewarea', {
source: this,
location: this._location
});
},
containsElement: function (element) {
return this.container.contains(element);
},
focus: function () {
this.container.focus();
},
get isInPresentationMode() {
return this.presentationModeState === PresentationModeState.FULLSCREEN;
},
get isChangingPresentationMode() {
return this.presentationModeState === PresentationModeState.CHANGING;
},
get isHorizontalScrollbarEnabled() {
return this.isInPresentationMode ? false : this.container.scrollWidth > this.container.clientWidth;
},
_getVisiblePages: function () {
if (!this.isInPresentationMode) {
return getVisibleElements(this.container, this._pages, true);
} else {
// The algorithm in getVisibleElements doesn't work in all browsers and
// configurations when presentation mode is active.
var visible = [];
var currentPage = this._pages[this._currentPageNumber - 1];
visible.push({
id: currentPage.id,
view: currentPage
});
return {
first: currentPage,
last: currentPage,
views: visible
};
}
},
cleanup: function () {
for (var i = 0, ii = this._pages.length; i < ii; i++) {
if (this._pages[i] && this._pages[i].renderingState !== RenderingStates.FINISHED) {
this._pages[i].reset();
}
}
},
/**
* @private
*/
_cancelRendering: function PDFViewer_cancelRendering() {
for (var i = 0, ii = this._pages.length; i < ii; i++) {
if (this._pages[i]) {
this._pages[i].cancelRendering();
}
}
},
/**
* @param {PDFPageView} pageView
* @returns {PDFPage}
* @private
*/
_ensurePdfPageLoaded: function (pageView) {
if (pageView.pdfPage) {
return Promise.resolve(pageView.pdfPage);
}
var pageNumber = pageView.id;
if (this._pagesRequests[pageNumber]) {
return this._pagesRequests[pageNumber];
}
var promise = this.pdfDocument.getPage(pageNumber).then(function (pdfPage) {
pageView.setPdfPage(pdfPage);
this._pagesRequests[pageNumber] = null;
return pdfPage;
}.bind(this));
this._pagesRequests[pageNumber] = promise;
return promise;
},
forceRendering: function (currentlyVisiblePages) {
var visiblePages = currentlyVisiblePages || this._getVisiblePages();
var pageView = this.renderingQueue.getHighestPriority(visiblePages, this._pages, this.scroll.down);
if (pageView) {
this._ensurePdfPageLoaded(pageView).then(function () {
this.renderingQueue.renderView(pageView);
}.bind(this));
return true;
}
return false;
},
getPageTextContent: function (pageIndex) {
return this.pdfDocument.getPage(pageIndex + 1).then(function (page) {
return page.getTextContent({ normalizeWhitespace: true });
});
},
/**
* @param {HTMLDivElement} textLayerDiv
* @param {number} pageIndex
* @param {PageViewport} viewport
* @returns {TextLayerBuilder}
*/
createTextLayerBuilder: function (textLayerDiv, pageIndex, viewport, enhanceTextSelection) {
return new TextLayerBuilder({
textLayerDiv: textLayerDiv,
eventBus: this.eventBus,
pageIndex: pageIndex,
viewport: viewport,
findController: this.isInPresentationMode ? null : this.findController,
enhanceTextSelection: this.isInPresentationMode ? false : enhanceTextSelection
});
},
/**
* @param {HTMLDivElement} pageDiv
* @param {PDFPage} pdfPage
* @param {boolean} renderInteractiveForms
* @returns {AnnotationLayerBuilder}
*/
createAnnotationLayerBuilder: function (pageDiv, pdfPage, renderInteractiveForms) {
return new AnnotationLayerBuilder({
pageDiv: pageDiv,
pdfPage: pdfPage,
renderInteractiveForms: renderInteractiveForms,
linkService: this.linkService,
downloadManager: this.downloadManager
});
},
setFindController: function (findController) {
this.findController = findController;
},
/**
* Returns sizes of the pages.
* @returns {Array} Array of objects with width/height fields.
*/
getPagesOverview: function () {
return this._pages.map(function (pageView) {
var viewport = pageView.pdfPage.getViewport(1);
return {
width: viewport.width,
height: viewport.height
};
});
}
};
return PDFViewer;
}();
exports.PresentationModeState = PresentationModeState;
exports.PDFViewer = PDFViewer;
}));
}.call(pdfViewerLibs));
var PDFJS = pdfjsLib.PDFJS;
PDFJS.PDFViewer = pdfViewerLibs.pdfjsWebPDFViewer.PDFViewer;
PDFJS.PDFPageView = pdfViewerLibs.pdfjsWebPDFPageView.PDFPageView;
PDFJS.PDFLinkService = pdfViewerLibs.pdfjsWebPDFLinkService.PDFLinkService;
PDFJS.TextLayerBuilder = pdfViewerLibs.pdfjsWebTextLayerBuilder.TextLayerBuilder;
PDFJS.DefaultTextLayerFactory = pdfViewerLibs.pdfjsWebTextLayerBuilder.DefaultTextLayerFactory;
PDFJS.AnnotationLayerBuilder = pdfViewerLibs.pdfjsWebAnnotationLayerBuilder.AnnotationLayerBuilder;
PDFJS.DefaultAnnotationLayerFactory = pdfViewerLibs.pdfjsWebAnnotationLayerBuilder.DefaultAnnotationLayerFactory;
PDFJS.PDFHistory = pdfViewerLibs.pdfjsWebPDFHistory.PDFHistory;
PDFJS.PDFFindController = pdfViewerLibs.pdfjsWebPDFFindController.PDFFindController;
PDFJS.EventBus = pdfViewerLibs.pdfjsWebUIUtils.EventBus;
PDFJS.DownloadManager = pdfViewerLibs.pdfjsWebDownloadManager.DownloadManager;
PDFJS.ProgressBar = pdfViewerLibs.pdfjsWebUIUtils.ProgressBar;
exports.PDFJS = PDFJS;
}));