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openmedialibrary_reader/pdf.js/viewer.js

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extra repo for ebook readers
2015-03-07 19:41:19 +00:00
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 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.
*/
/* globals PDFJS, PDFBug, FirefoxCom, Stats, Cache, PDFFindBar, CustomStyle,
PDFFindController, ProgressBar, TextLayerBuilder, DownloadManager,
getFileName, scrollIntoView, getPDFFileNameFromURL, PDFHistory,
Preferences, ViewHistory, PageView, ThumbnailView,
noContextMenuHandler, SecondaryToolbar, PasswordPrompt,
PresentationMode, HandTool, Promise */
'use strict';
var DEFAULT_SCALE = 'auto';
var DEFAULT_SCALE_DELTA = 1.1;
var UNKNOWN_SCALE = 0;
var CACHE_SIZE = 20;
var CSS_UNITS = 96.0 / 72.0;
var SCROLLBAR_PADDING = 40;
var VERTICAL_PADDING = 5;
var MAX_AUTO_SCALE = 1.25;
var MIN_SCALE = 0.25;
var MAX_SCALE = 4.0;
var VIEW_HISTORY_MEMORY = 20;
var IMAGE_DIR = '/static/pdf.js/images/';
var SCALE_SELECT_CONTAINER_PADDING = 8;
var SCALE_SELECT_PADDING = 22;
var THUMBNAIL_SCROLL_MARGIN = -19;
var USE_ONLY_CSS_ZOOM = false;
var CLEANUP_TIMEOUT = 30000;
var RenderingStates = {
INITIAL: 0,
RUNNING: 1,
PAUSED: 2,
FINISHED: 3
};
var FindStates = {
FIND_FOUND: 0,
FIND_NOTFOUND: 1,
FIND_WRAPPED: 2,
FIND_PENDING: 3
};
PDFJS.imageResourcesPath = './images/';
PDFJS.workerSrc = '/static/pdf.js/pdf.worker.js';
var mozL10n = document.mozL10n || document.webL10n;
// optimised CSS custom property getter/setter
var CustomStyle = (function CustomStyleClosure() {
// As noted on: http://www.zachstronaut.com/posts/2009/02/17/
// animate-css-transforms-firefox-webkit.html
// in some versions of IE9 it is critical that ms appear in this list
// before Moz
var prefixes = ['ms', 'Moz', 'Webkit', 'O'];
var _cache = { };
function CustomStyle() {
}
CustomStyle.getProp = function get(propName, element) {
// check cache only when no element is given
if (arguments.length == 1 && typeof _cache[propName] == 'string') {
return _cache[propName];
}
element = element || document.documentElement;
var style = element.style, prefixed, uPropName;
// test standard property first
if (typeof style[propName] == 'string') {
return (_cache[propName] = propName);
}
// capitalize
uPropName = propName.charAt(0).toUpperCase() + propName.slice(1);
// test vendor specific properties
for (var i = 0, l = prefixes.length; i < l; i++) {
prefixed = prefixes[i] + uPropName;
if (typeof style[prefixed] == 'string') {
return (_cache[propName] = prefixed);
}
}
//if all fails then set to undefined
return (_cache[propName] = 'undefined');
};
CustomStyle.setProp = function set(propName, element, str) {
var prop = this.getProp(propName);
if (prop != 'undefined')
element.style[prop] = str;
};
return CustomStyle;
})();
function getFileName(url) {
var anchor = url.indexOf('#');
var query = url.indexOf('?');
var end = Math.min(
anchor > 0 ? anchor : url.length,
query > 0 ? query : url.length);
return url.substring(url.lastIndexOf('/', end) + 1, end);
}
/**
* 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.
* element {Object} The element to be visible.
* spot {Object} An object with optional top and left properties,
* specifying the offset from the top left edge.
*/
function scrollIntoView(element, spot) {
// 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;
var offsetY = element.offsetTop + element.clientTop;
var offsetX = element.offsetLeft + element.clientLeft;
if (!parent) {
console.error('offsetParent is not set -- cannot scroll');
return;
}
while (parent.clientHeight === parent.scrollHeight) {
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;
}
/**
* 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) { // Possible (extremely rare) errors:
// URIError "Malformed URI", e.g. for "%AA.pdf"
// TypeError "null has no properties", e.g. for "%2F.pdf"
}
}
}
return suggestedFilename || 'document.pdf';
}
var ProgressBar = (function ProgressBarClosure() {
function clamp(v, min, max) {
return Math.min(Math.max(v, min), max);
}
function ProgressBar(id, opts) {
// 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() {
this.bar.classList.add('hidden');
this.bar.removeAttribute('style');
}
};
return ProgressBar;
})();
var Cache = function cacheCache(size) {
var data = [];
this.push = function cachePush(view) {
var i = data.indexOf(view);
if (i >= 0)
data.splice(i);
data.push(view);
if (data.length > size)
data.shift().destroy();
};
};
var isLocalStorageEnabled = (function isLocalStorageEnabledClosure() {
// Feature test as per http://diveintohtml5.info/storage.html
// The additional localStorage call is to get around a FF quirk, see
// bug #495747 in bugzilla
try {
return ('localStorage' in window && window['localStorage'] !== null &&
localStorage);
} catch (e) {
return false;
}
})();
var EXPORTED_SYMBOLS = ['DEFAULT_PREFERENCES'];
var DEFAULT_PREFERENCES = {
showPreviousViewOnLoad: true,
defaultZoomValue: '',
ifAvailableShowOutlineOnLoad: false
};
var Preferences = (function PreferencesClosure() {
function Preferences() {
this.prefs = {};
this.isInitializedPromiseResolved = false;
this.initializedPromise = this.readFromStorage().then(function(prefObj) {
this.isInitializedPromiseResolved = true;
if (prefObj) {
this.prefs = prefObj;
}
}.bind(this));
}
Preferences.prototype = {
writeToStorage: function Preferences_writeToStorage(prefObj) {
return;
},
readFromStorage: function Preferences_readFromStorage() {
var readFromStoragePromise = Promise.resolve();
return readFromStoragePromise;
},
reset: function Preferences_reset() {
if (this.isInitializedPromiseResolved) {
this.prefs = {};
this.writeToStorage(this.prefs);
}
},
set: function Preferences_set(name, value) {
if (!this.isInitializedPromiseResolved) {
return;
} else if (DEFAULT_PREFERENCES[name] === undefined) {
console.error('Preferences_set: \'' + name + '\' is undefined.');
return;
} else if (value === undefined) {
console.error('Preferences_set: no value is specified.');
return;
}
var valueType = typeof value;
var defaultType = typeof DEFAULT_PREFERENCES[name];
if (valueType !== defaultType) {
if (valueType === 'number' && defaultType === 'string') {
value = value.toString();
} else {
console.error('Preferences_set: \'' + value + '\' is a \"' +
valueType + '\", expected a \"' + defaultType + '\".');
return;
}
}
this.prefs[name] = value;
this.writeToStorage(this.prefs);
},
get: function Preferences_get(name) {
var defaultPref = DEFAULT_PREFERENCES[name];
if (defaultPref === undefined) {
console.error('Preferences_get: \'' + name + '\' is undefined.');
return;
} else if (this.isInitializedPromiseResolved) {
var pref = this.prefs[name];
if (pref !== undefined) {
return pref;
}
}
return defaultPref;
}
};
return Preferences;
})();
Preferences.prototype.writeToStorage = function(prefObj) {
if (isLocalStorageEnabled) {
localStorage.setItem('preferences', JSON.stringify(prefObj));
}
};
Preferences.prototype.readFromStorage = function() {
var readFromStoragePromise = new Promise(function (resolve) {
if (isLocalStorageEnabled) {
var readPrefs = JSON.parse(localStorage.getItem('preferences'));
resolve(readPrefs);
}
});
return readFromStoragePromise;
};
(function mozPrintCallbackPolyfillClosure() {
if ('mozPrintCallback' in document.createElement('canvas')) {
return;
}
// Cause positive result on feature-detection:
HTMLCanvasElement.prototype.mozPrintCallback = undefined;
var canvases; // During print task: non-live NodeList of <canvas> elements
var index; // Index of <canvas> element that is being processed
var print = window.print;
window.print = function print() {
if (canvases) {
console.warn('Ignored window.print() because of a pending print job.');
return;
}
try {
dispatchEvent('beforeprint');
} finally {
canvases = document.querySelectorAll('canvas');
index = -1;
next();
}
};
function dispatchEvent(eventType) {
var event = document.createEvent('CustomEvent');
event.initCustomEvent(eventType, false, false, 'custom');
window.dispatchEvent(event);
}
function next() {
if (!canvases) {
return; // Print task cancelled by user (state reset in abort())
}
renderProgress();
if (++index < canvases.length) {
var canvas = canvases[index];
if (typeof canvas.mozPrintCallback === 'function') {
canvas.mozPrintCallback({
context: canvas.getContext('2d'),
abort: abort,
done: next
});
} else {
next();
}
} else {
renderProgress();
print.call(window);
setTimeout(abort, 20); // Tidy-up
}
}
function abort() {
if (canvases) {
canvases = null;
renderProgress();
dispatchEvent('afterprint');
}
}
function renderProgress() {
var progressContainer = document.getElementById('mozPrintCallback-shim');
if (canvases) {
var progress = Math.round(100 * index / canvases.length);
var progressBar = progressContainer.querySelector('progress');
var progressPerc = progressContainer.querySelector('.relative-progress');
progressBar.value = progress;
progressPerc.textContent = progress + '%';
progressContainer.removeAttribute('hidden');
progressContainer.onclick = abort;
} else {
progressContainer.setAttribute('hidden', '');
}
}
var hasAttachEvent = !!document.attachEvent;
window.addEventListener('keydown', function(event) {
if (event.keyCode === 80/*P*/ && (event.ctrlKey || event.metaKey)) {
window.print();
if (hasAttachEvent) {
// Only attachEvent can cancel Ctrl + P dialog in IE <=10
// attachEvent is gone in IE11, so the dialog will re-appear in IE11.
return;
}
event.preventDefault();
if (event.stopImmediatePropagation) {
event.stopImmediatePropagation();
} else {
event.stopPropagation();
}
return;
}
if (event.keyCode === 27 && canvases) { // Esc
abort();
}
}, true);
if (hasAttachEvent) {
document.attachEvent('onkeydown', function(event) {
event = event || window.event;
if (event.keyCode === 80/*P*/ && event.ctrlKey) {
event.keyCode = 0;
return false;
}
});
}
if ('onbeforeprint' in window) {
// Do not propagate before/afterprint events when they are not triggered
// from within this polyfill. (FF/IE).
var stopPropagationIfNeeded = function(event) {
if (event.detail !== 'custom' && event.stopImmediatePropagation) {
event.stopImmediatePropagation();
}
};
window.addEventListener('beforeprint', stopPropagationIfNeeded, false);
window.addEventListener('afterprint', stopPropagationIfNeeded, false);
}
})();
var DownloadManager = (function DownloadManagerClosure() {
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 (!PDFJS.isValidUrl(url, true)) {
return; // restricted/invalid URL
}
download(url + '#pdfjs.action=download', 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);
}
};
return DownloadManager;
})();
var cache = new Cache(CACHE_SIZE);
var currentPageNumber = 1;
/**
* View History - This is a utility for saving various view parameters for
* recently opened files.
*
* The way that the view parameters are stored depends on how PDF.js is built,
* for 'node make <flag>' the following cases exist:
* - FIREFOX or MOZCENTRAL - uses about:config.
* - B2G - uses asyncStorage.
* - GENERIC or CHROME - uses localStorage, if it is available.
*/
var ViewHistory = (function ViewHistoryClosure() {
function ViewHistory(fingerprint) {
this.fingerprint = fingerprint;
var initializedPromiseResolve;
this.isInitializedPromiseResolved = false;
this.initializedPromise = new Promise(function (resolve) {
initializedPromiseResolve = resolve;
});
var resolvePromise = (function ViewHistoryResolvePromise(db) {
this.isInitializedPromiseResolved = true;
this.initialize(db || '{}');
initializedPromiseResolve();
}).bind(this);
if (isLocalStorageEnabled) {
resolvePromise(localStorage.getItem('database'));
}
}
ViewHistory.prototype = {
initialize: function ViewHistory_initialize(database) {
database = JSON.parse(database);
if (!('files' in database)) {
database.files = [];
}
if (database.files.length >= VIEW_HISTORY_MEMORY) {
database.files.shift();
}
var index;
for (var i = 0, length = database.files.length; i < length; i++) {
var branch = database.files[i];
if (branch.fingerprint === this.fingerprint) {
index = i;
break;
}
}
if (typeof index !== 'number') {
index = database.files.push({fingerprint: this.fingerprint}) - 1;
}
this.file = database.files[index];
this.database = database;
},
set: function ViewHistory_set(name, val) {
if (!this.isInitializedPromiseResolved) {
return;
}
var file = this.file;
file[name] = val;
var database = JSON.stringify(this.database);
if (isLocalStorageEnabled) {
localStorage.setItem('database', database);
}
},
get: function ViewHistory_get(name, defaultValue) {
if (!this.isInitializedPromiseResolved) {
return defaultValue;
}
return this.file[name] || defaultValue;
}
};
return ViewHistory;
})();
/* globals PDFFindController, FindStates, mozL10n */
/**
* Creates a "search bar" given set of DOM elements
* that act as controls for searching, or for setting
* search preferences in the UI. This object also sets
* up the appropriate events for the controls. Actual
* searching is done by PDFFindController
*/
var PDFFindBar = {
opened: false,
bar: null,
toggleButton: null,
findField: null,
highlightAll: null,
caseSensitive: null,
findMsg: null,
findStatusIcon: null,
findPreviousButton: null,
findNextButton: null,
initialize: function(options) {
if(typeof PDFFindController === 'undefined' || PDFFindController === null) {
throw 'PDFFindBar cannot be initialized ' +
'without a PDFFindController instance.';
}
this.bar = options.bar;
this.toggleButton = options.toggleButton;
this.findField = options.findField;
this.highlightAll = options.highlightAllCheckbox;
this.caseSensitive = options.caseSensitiveCheckbox;
this.findMsg = options.findMsg;
this.findStatusIcon = options.findStatusIcon;
this.findPreviousButton = options.findPreviousButton;
this.findNextButton = options.findNextButton;
var self = this;
this.toggleButton.addEventListener('click', function() {
self.toggle();
});
this.findField.addEventListener('input', function() {
self.dispatchEvent('');
});
this.bar.addEventListener('keydown', function(evt) {
switch (evt.keyCode) {
case 13: // Enter
if (evt.target === self.findField) {
self.dispatchEvent('again', evt.shiftKey);
}
break;
case 27: // Escape
self.close();
break;
}
});
this.findPreviousButton.addEventListener('click',
function() { self.dispatchEvent('again', true); }
);
this.findNextButton.addEventListener('click', function() {
self.dispatchEvent('again', false);
});
this.highlightAll.addEventListener('click', function() {
self.dispatchEvent('highlightallchange');
});
this.caseSensitive.addEventListener('click', function() {
self.dispatchEvent('casesensitivitychange');
});
},
dispatchEvent: function(aType, aFindPrevious) {
var event = document.createEvent('CustomEvent');
event.initCustomEvent('find' + aType, true, true, {
query: this.findField.value,
caseSensitive: this.caseSensitive.checked,
highlightAll: this.highlightAll.checked,
findPrevious: aFindPrevious
});
return window.dispatchEvent(event);
},
updateUIState: function(state, previous) {
var notFound = false;
var findMsg = '';
var status = '';
switch (state) {
case FindStates.FIND_FOUND:
break;
case FindStates.FIND_PENDING:
status = 'pending';
break;
case FindStates.FIND_NOTFOUND:
findMsg = mozL10n.get('find_not_found', null, 'Phrase not found');
notFound = true;
break;
case FindStates.FIND_WRAPPED:
if (previous) {
findMsg = mozL10n.get('find_reached_top', null,
'Reached top of document, continued from bottom');
} else {
findMsg = mozL10n.get('find_reached_bottom', null,
'Reached end of document, continued from top');
}
break;
}
if (notFound) {
this.findField.classList.add('notFound');
} else {
this.findField.classList.remove('notFound');
}
this.findField.setAttribute('data-status', status);
this.findMsg.textContent = findMsg;
},
open: function() {
if (!this.opened) {
this.opened = true;
this.toggleButton.classList.add('toggled');
this.bar.classList.remove('hidden');
}
this.findField.select();
this.findField.focus();
},
close: function() {
if (!this.opened) return;
this.opened = false;
this.toggleButton.classList.remove('toggled');
this.bar.classList.add('hidden');
PDFFindController.active = false;
},
toggle: function() {
if (this.opened) {
this.close();
} else {
this.open();
}
}
};
/* globals PDFFindBar, PDFJS, FindStates, FirefoxCom, Promise */
/**
* Provides a "search" or "find" functionality for the PDF.
* This object actually performs the search for a given string.
*/
var PDFFindController = {
startedTextExtraction: false,
extractTextPromises: [],
pendingFindMatches: {},
// If active, find results will be highlighted.
active: false,
// Stores the text for each page.
pageContents: [],
pageMatches: [],
// Currently selected match.
selected: {
pageIdx: -1,
matchIdx: -1
},
// Where find algorithm currently is in the document.
offset: {
pageIdx: null,
matchIdx: null
},
resumePageIdx: null,
resumeCallback: null,
state: null,
dirtyMatch: false,
findTimeout: null,
pdfPageSource: null,
integratedFind: false,
initialize: function(options) {
if(typeof PDFFindBar === 'undefined' || PDFFindBar === null) {
throw 'PDFFindController cannot be initialized ' +
'without a PDFFindController instance';
}
this.pdfPageSource = options.pdfPageSource;
this.integratedFind = options.integratedFind;
var events = [
'find',
'findagain',
'findhighlightallchange',
'findcasesensitivitychange'
];
this.firstPagePromise = new Promise(function (resolve) {
this.resolveFirstPage = resolve;
}.bind(this));
this.handleEvent = this.handleEvent.bind(this);
for (var i = 0; i < events.length; i++) {
window.addEventListener(events[i], this.handleEvent);
}
},
reset: function pdfFindControllerReset() {
this.startedTextExtraction = false;
this.extractTextPromises = [];
this.active = false;
},
calcFindMatch: function(pageIndex) {
var pageContent = this.pageContents[pageIndex];
var query = this.state.query;
var caseSensitive = this.state.caseSensitive;
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();
}
var matches = [];
var matchIdx = -queryLen;
while (true) {
matchIdx = pageContent.indexOf(query, matchIdx + queryLen);
if (matchIdx === -1) {
break;
}
matches.push(matchIdx);
}
this.pageMatches[pageIndex] = matches;
this.updatePage(pageIndex);
if (this.resumePageIdx === pageIndex) {
var callback = this.resumeCallback;
this.resumePageIdx = null;
this.resumeCallback = null;
callback();
}
},
extractText: function() {
if (this.startedTextExtraction) {
return;
}
this.startedTextExtraction = true;
this.pageContents = [];
var extractTextPromisesResolves = [];
for (var i = 0, ii = this.pdfPageSource.pdfDocument.numPages; i < ii; i++) {
this.extractTextPromises.push(new Promise(function (resolve) {
extractTextPromisesResolves.push(resolve);
}));
}
var self = this;
function extractPageText(pageIndex) {
self.pdfPageSource.pages[pageIndex].getTextContent().then(
function textContentResolved(data) {
// Build the find string.
var bidiTexts = data.bidiTexts;
var str = '';
for (var i = 0; i < bidiTexts.length; i++) {
str += bidiTexts[i].str;
}
// Store the pageContent as a string.
self.pageContents.push(str);
extractTextPromisesResolves[pageIndex](pageIndex);
if ((pageIndex + 1) < self.pdfPageSource.pages.length)
extractPageText(pageIndex + 1);
}
);
}
extractPageText(0);
},
handleEvent: function(e) {
if (this.state === null || e.type !== 'findagain') {
this.dirtyMatch = true;
}
this.state = e.detail;
this.updateUIState(FindStates.FIND_PENDING);
this.firstPagePromise.then(function() {
this.extractText();
clearTimeout(this.findTimeout);
if (e.type === '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(idx) {
var page = this.pdfPageSource.pages[idx];
if (this.selected.pageIdx === idx) {
// 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.
page.scrollIntoView();
}
if (page.textLayer) {
page.textLayer.updateMatches();
}
},
nextMatch: function() {
var previous = this.state.findPrevious;
var currentPageIndex = this.pdfPageSource.page - 1;
var numPages = this.pdfPageSource.pages.length;
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.resumeCallback = null;
this.resumePageIdx = null;
this.pageMatches = [];
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.resumeCallback) {
return;
}
var offset = this.offset;
// 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();
},
nextPageMatch: function() {
if (this.resumePageIdx !== null)
console.error('There can only be one pending page.');
var matchesReady = function(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);
} else {
// No matches attempt to search the next page.
this.advanceOffsetPage(previous);
if (offset.wrapped) {
offset.matchIdx = null;
if (!this.hadMatch) {
// No point in wrapping there were no matches.
this.updateMatch(false);
return;
}
}
// Search the next page.
this.nextPageMatch();
}
}.bind(this);
var pageIdx = this.offset.pageIdx;
var pageMatches = this.pageMatches;
if (!pageMatches[pageIdx]) {
// The matches aren't ready setup a callback so we can be notified,
// when they are ready.
this.resumeCallback = function() {
matchesReady(pageMatches[pageIdx]);
};
this.resumePageIdx = pageIdx;
return;
}
// The matches are finished already.
matchesReady(pageMatches[pageIdx]);
},
advanceOffsetPage: function(previous) {
var offset = this.offset;
var numPages = this.extractTextPromises.length;
offset.pageIdx = previous ? offset.pageIdx - 1 : offset.pageIdx + 1;
offset.matchIdx = null;
if (offset.pageIdx >= numPages || offset.pageIdx < 0) {
offset.pageIdx = previous ? numPages - 1 : 0;
offset.wrapped = true;
return;
}
},
updateMatch: function(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, true);
}
},
updateUIState: function(state, previous) {
if (this.integratedFind) {
FirefoxCom.request('updateFindControlState',
{result: state, findPrevious: previous});
return;
}
PDFFindBar.updateUIState(state, previous);
}
};
var PDFHistory = {
initialized: false,
initialDestination: null,
initialize: function pdfHistoryInitialize(fingerprint) {
if (PDFJS.disableHistory || PDFView.isViewerEmbedded) {
// The browsing history is only enabled when the viewer is standalone,
// i.e. not when it is embedded in a web page.
return;
}
this.initialized = true;
this.reInitialized = false;
this.allowHashChange = true;
this.historyUnlocked = true;
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 {
PDFView.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) {
evt.preventDefault();
evt.stopPropagation();
if (!self.historyUnlocked) {
return;
}
if (evt.state) {
// Move back/forward in the history.
self._goTo(evt.state);
} else {
// Handle the user modifying the hash of a loaded document.
self.previousHash = window.location.hash.substring(1);
// If the history is empty when the hash changes,
// update the previous entry in the browser history.
if (self.uid === 0) {
var previousParams = (self.previousHash && self.currentBookmark &&
self.previousHash !== self.currentBookmark) ?
{ hash: self.currentBookmark, page: self.currentPage } :
{ page: 1 };
self.historyUnlocked = false;
self.allowHashChange = false;
window.history.back();
self._pushToHistory(previousParams, false, true);
window.history.forward();
self.historyUnlocked = true;
}
self._pushToHistory({ hash: self.previousHash }, false, true);
self._updatePreviousBookmark();
}
}, false);
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);
},
_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;
}
// If the current hash changes when moving back/forward in the history,
// this will trigger a 'popstate' event *as well* as a 'hashchange' event.
// Since the hash generally won't correspond to the exact the position
// stored in the history's state object, triggering the 'hashchange' event
// can thus corrupt the browser history.
//
// When the hash changes during a 'popstate' event, we *only* prevent the
// first 'hashchange' event and immediately reset allowHashChange.
// If it is not reset, the user would not be able to change the hash.
var temp = this.allowHashChange;
this.allowHashChange = true;
return temp;
},
_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 :
PDFView.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 PDFView.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 (PresentationMode.active) {
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) {
PDFView.navigateTo(state.target.dest);
} else {
PDFView.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();
}
}
}
};
var SecondaryToolbar = {
opened: false,
previousContainerHeight: null,
newContainerHeight: null,
initialize: function secondaryToolbarInitialize(options) {
this.toolbar = options.toolbar;
this.presentationMode = options.presentationMode;
this.buttonContainer = this.toolbar.firstElementChild;
// Define the toolbar buttons.
this.toggleButton = options.toggleButton;
this.presentationModeButton = options.presentationModeButton;
this.openFile = options.openFile;
this.print = options.print;
this.download = options.download;
this.firstPage = options.firstPage;
this.lastPage = options.lastPage;
this.pageRotateCw = options.pageRotateCw;
this.pageRotateCcw = options.pageRotateCcw;
// Attach the event listeners.
var elements = [
// Button to toggle the visibility of the secondary toolbar:
{ element: this.toggleButton, handler: this.toggle },
// All items within the secondary toolbar
// (except for toggleHandTool, hand_tool.js is responsible for it):
{ element: this.presentationModeButton,
handler: this.presentationModeClick },
{ element: this.openFile, handler: this.openFileClick },
{ element: this.print, handler: this.printClick },
{ element: this.download, handler: this.downloadClick },
{ element: this.firstPage, handler: this.firstPageClick },
{ element: this.lastPage, handler: this.lastPageClick },
{ element: this.pageRotateCw, handler: this.pageRotateCwClick },
{ element: this.pageRotateCcw, handler: this.pageRotateCcwClick }
];
for (var item in elements) {
var element = elements[item].element;
if (element) {
element.addEventListener('click', elements[item].handler.bind(this));
}
}
},
// Event handling functions.
presentationModeClick: function secondaryToolbarPresentationModeClick(evt) {
this.presentationMode.request();
this.close();
},
openFileClick: function secondaryToolbarOpenFileClick(evt) {
document.getElementById('fileInput').click();
this.close(evt.target);
},
printClick: function secondaryToolbarPrintClick(evt) {
window.print();
this.close(evt.target);
},
downloadClick: function secondaryToolbarDownloadClick(evt) {
PDFView.download();
this.close(evt.target);
},
firstPageClick: function secondaryToolbarFirstPageClick(evt) {
PDFView.page = 1;
},
lastPageClick: function secondaryToolbarLastPageClick(evt) {
PDFView.page = PDFView.pdfDocument.numPages;
},
pageRotateCwClick: function secondaryToolbarPageRotateCwClick(evt) {
PDFView.rotatePages(90);
},
pageRotateCcwClick: function secondaryToolbarPageRotateCcwClick(evt) {
PDFView.rotatePages(-90);
},
// Misc. functions for interacting with the toolbar.
setMaxHeight: function secondaryToolbarSetMaxHeight(container) {
if (!container || !this.buttonContainer) {
return;
}
this.newContainerHeight = container.clientHeight;
if (this.previousContainerHeight === this.newContainerHeight) {
return;
}
this.buttonContainer.setAttribute('style',
'max-height: ' + (this.newContainerHeight - SCROLLBAR_PADDING) + 'px;');
this.previousContainerHeight = this.newContainerHeight;
},
open: function secondaryToolbarOpen() {
if (this.opened) {
return;
}
this.opened = true;
this.toggleButton.classList.add('toggled');
this.toolbar.classList.remove('hidden');
},
close: function secondaryToolbarClose(target) {
if (!this.opened) {
return;
} else if (target && !this.toolbar.contains(target)) {
return;
}
this.opened = false;
this.toolbar.classList.add('hidden');
this.toggleButton.classList.remove('toggled');
},
toggle: function secondaryToolbarToggle() {
if (this.opened) {
this.close();
} else {
this.open();
}
}
};
var PasswordPrompt = {
visible: false,
updatePassword: null,
reason: null,
overlayContainer: null,
passwordField: null,
passwordText: null,
passwordSubmit: null,
passwordCancel: null,
initialize: function secondaryToolbarInitialize(options) {
this.overlayContainer = options.overlayContainer;
this.passwordField = options.passwordField;
this.passwordText = options.passwordText;
this.passwordSubmit = options.passwordSubmit;
this.passwordCancel = options.passwordCancel;
// Attach the event listeners.
this.passwordSubmit.addEventListener('click',
this.verifyPassword.bind(this));
this.passwordCancel.addEventListener('click', this.hide.bind(this));
this.passwordField.addEventListener('keydown',
function (e) {
if (e.keyCode === 13) { // Enter key
this.verifyPassword();
}
}.bind(this));
this.overlayContainer.addEventListener('keydown',
function (e) {
if (e.keyCode === 27) { // Esc key
this.hide();
}
}.bind(this));
},
show: function passwordPromptShow() {
if (this.visible) {
return;
}
this.visible = true;
this.overlayContainer.classList.remove('hidden');
this.passwordField.focus();
var promptString = mozL10n.get('password_label', null,
'Enter the password to open this PDF file.');
if (this.reason === PDFJS.PasswordResponses.INCORRECT_PASSWORD) {
promptString = mozL10n.get('password_invalid', null,
'Invalid password. Please try again.');
}
this.passwordText.textContent = promptString;
},
hide: function passwordPromptClose() {
if (!this.visible) {
return;
}
this.visible = false;
this.passwordField.value = '';
this.overlayContainer.classList.add('hidden');
},
verifyPassword: function passwordPromptVerifyPassword() {
var password = this.passwordField.value;
if (password && password.length > 0) {
this.hide();
return this.updatePassword(password);
}
}
};
var DELAY_BEFORE_HIDING_CONTROLS = 3000; // in ms
var SELECTOR = 'presentationControls';
var PresentationMode = {
active: false,
args: null,
contextMenuOpen: false,
prevCoords: { x: null, y: null },
initialize: function presentationModeInitialize(options) {
this.container = options.container;
this.secondaryToolbar = options.secondaryToolbar;
this.viewer = this.container.firstElementChild;
this.firstPage = options.firstPage;
this.lastPage = options.lastPage;
this.pageRotateCw = options.pageRotateCw;
this.pageRotateCcw = options.pageRotateCcw;
this.firstPage.addEventListener('click', function() {
this.contextMenuOpen = false;
this.secondaryToolbar.firstPageClick();
}.bind(this));
this.lastPage.addEventListener('click', function() {
this.contextMenuOpen = false;
this.secondaryToolbar.lastPageClick();
}.bind(this));
this.pageRotateCw.addEventListener('click', function() {
this.contextMenuOpen = false;
this.secondaryToolbar.pageRotateCwClick();
}.bind(this));
this.pageRotateCcw.addEventListener('click', function() {
this.contextMenuOpen = false;
this.secondaryToolbar.pageRotateCcwClick();
}.bind(this));
},
get isFullscreen() {
return (document.fullscreenElement ||
document.mozFullScreen ||
document.webkitIsFullScreen ||
document.msFullscreenElement);
},
request: function presentationModeRequest() {
if (!PDFView.supportsFullscreen || this.isFullscreen ||
!this.viewer.hasChildNodes()) {
return false;
}
if (this.container.requestFullscreen) {
this.container.requestFullscreen();
} else if (this.container.mozRequestFullScreen) {
this.container.mozRequestFullScreen();
} else if (this.container.webkitRequestFullScreen) {
this.container.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
} else if (this.container.msRequestFullscreen) {
this.container.msRequestFullscreen();
} else {
return false;
}
this.args = {
page: PDFView.page,
previousScale: PDFView.currentScaleValue
};
return true;
},
enter: function presentationModeEnter() {
this.active = true;
PDFView.page = this.args.page;
PDFView.setScale('page-fit', true);
window.addEventListener('mousemove', this.mouseMove, false);
window.addEventListener('mousedown', this.mouseDown, false);
window.addEventListener('contextmenu', this.contextMenu, false);
this.showControls();
HandTool.enterPresentationMode();
this.contextMenuOpen = false;
this.container.setAttribute('contextmenu', 'viewerContextMenu');
},
exit: function presentationModeExit() {
this.active = false;
var page = PDFView.page;
PDFView.setScale(this.args.previousScale);
PDFView.page = page;
window.removeEventListener('mousemove', this.mouseMove, false);
window.removeEventListener('mousedown', this.mouseDown, false);
window.removeEventListener('contextmenu', this.contextMenu, false);
this.hideControls();
this.args = null;
PDFView.clearMouseScrollState();
HandTool.exitPresentationMode();
this.container.removeAttribute('contextmenu');
this.contextMenuOpen = false;
// Ensure that the thumbnail of the current page is visible
// when exiting presentation mode.
scrollIntoView(document.getElementById('thumbnailContainer' + page));
},
showControls: function presentationModeShowControls() {
if (this.controlsTimeout) {
clearTimeout(this.controlsTimeout);
} else {
this.container.classList.add(SELECTOR);
}
this.controlsTimeout = setTimeout(function hideControlsTimeout() {
this.container.classList.remove(SELECTOR);
delete this.controlsTimeout;
}.bind(this), DELAY_BEFORE_HIDING_CONTROLS);
},
hideControls: function presentationModeHideControls() {
if (!this.controlsTimeout) {
return;
}
this.container.classList.remove(SELECTOR);
clearTimeout(this.controlsTimeout);
delete this.controlsTimeout;
},
mouseMove: function presentationModeMouseMove(evt) {
// Workaround for a bug in WebKit browsers that causes the 'mousemove' event
// to be fired when the cursor is changed. For details, see:
// http://code.google.com/p/chromium/issues/detail?id=103041.
var currCoords = { x: evt.clientX, y: evt.clientY };
var prevCoords = PresentationMode.prevCoords;
PresentationMode.prevCoords = currCoords;
if (currCoords.x === prevCoords.x && currCoords.y === prevCoords.y) {
return;
}
PresentationMode.showControls();
},
mouseDown: function presentationModeMouseDown(evt) {
var self = PresentationMode;
if (self.contextMenuOpen) {
self.contextMenuOpen = false;
evt.preventDefault();
return;
}
if (evt.button === 0) {
// Enable clicking of links in presentation mode. Please note:
// Only links pointing to destinations in the current PDF document work.
var isInternalLink = (evt.target.href &&
evt.target.classList.contains('internalLink'));
if (!isInternalLink) {
// Unless an internal link was clicked, advance one page.
evt.preventDefault();
PDFView.page += (evt.shiftKey ? -1 : 1);
}
}
},
contextMenu: function presentationModeContextMenu(evt) {
PresentationMode.contextMenuOpen = true;
}
};
(function presentationModeClosure() {
function presentationModeChange(e) {
if (PresentationMode.isFullscreen) {
PresentationMode.enter();
} else {
PresentationMode.exit();
}
}
window.addEventListener('fullscreenchange', presentationModeChange, false);
window.addEventListener('mozfullscreenchange', presentationModeChange, false);
window.addEventListener('webkitfullscreenchange', presentationModeChange,
false);
window.addEventListener('MSFullscreenChange', presentationModeChange, false);
})();
/* Copyright 2013 Rob Wu <gwnRob@gmail.com>
* https://github.com/Rob--W/grab-to-pan.js
*
* 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.
*/
'use strict';
var GrabToPan = (function GrabToPanClosure() {
/**
* Construct a GrabToPan instance for a given HTML element.
* @param options.element {Element}
* @param options.ignoreTarget {function} optional. See `ignoreTarget(node)`
* @param options.onActiveChanged {function(boolean)} optional. Called
* when grab-to-pan is (de)activated. The first argument is a boolean that
* shows whether grab-to-pan is activated.
*/
function GrabToPan(options) {
this.element = options.element;
this.document = options.element.ownerDocument;
if (typeof options.ignoreTarget === 'function') {
this.ignoreTarget = options.ignoreTarget;
}
this.onActiveChanged = options.onActiveChanged;
// Bind the contexts to ensure that `this` always points to
// the GrabToPan instance.
this.activate = this.activate.bind(this);
this.deactivate = this.deactivate.bind(this);
this.toggle = this.toggle.bind(this);
this._onmousedown = this._onmousedown.bind(this);
this._onmousemove = this._onmousemove.bind(this);
this._endPan = this._endPan.bind(this);
}
GrabToPan.prototype = {
/**
* Class name of element which can be grabbed
*/
CSS_CLASS_GRAB: 'grab-to-pan-grab',
/**
* Class name of element which is being dragged & panned
*/
CSS_CLASS_GRABBING: 'grab-to-pan-grabbing',
/**
* Bind a mousedown event to the element to enable grab-detection.
*/
activate: function GrabToPan_activate() {
if (!this.active) {
this.active = true;
this.element.addEventListener('mousedown', this._onmousedown, true);
this.element.classList.add(this.CSS_CLASS_GRAB);
if (this.onActiveChanged) {
this.onActiveChanged(true);
}
}
},
/**
* Removes all events. Any pending pan session is immediately stopped.
*/
deactivate: function GrabToPan_deactivate() {
if (this.active) {
this.active = false;
this.element.removeEventListener('mousedown', this._onmousedown, true);
this._endPan();
this.element.classList.remove(this.CSS_CLASS_GRAB);
if (this.onActiveChanged) {
this.onActiveChanged(false);
}
}
},
toggle: function GrabToPan_toggle() {
if (this.active) {
this.deactivate();
} else {
this.activate();
}
},
/**
* Whether to not pan if the target element is clicked.
* Override this method to change the default behaviour.
*
* @param node {Element} The target of the event
* @return {boolean} Whether to not react to the click event.
*/
ignoreTarget: function GrabToPan_ignoreTarget(node) {
// Use matchesSelector to check whether the clicked element
// is (a child of) an input element / link
return node[matchesSelector](
'a[href], a[href] *, input, textarea, button, button *, select, option'
);
},
/**
* @private
*/
_onmousedown: function GrabToPan__onmousedown(event) {
if (event.button !== 0 || this.ignoreTarget(event.target)) {
return;
}
if (event.originalTarget) {
try {
/* jshint expr:true */
event.originalTarget.tagName;
} catch (e) {
// Mozilla-specific: element is a scrollbar (XUL element)
return;
}
}
this.scrollLeftStart = this.element.scrollLeft;
this.scrollTopStart = this.element.scrollTop;
this.clientXStart = event.clientX;
this.clientYStart = event.clientY;
this.document.addEventListener('mousemove', this._onmousemove, true);
this.document.addEventListener('mouseup', this._endPan, true);
// When a scroll event occurs before a mousemove, assume that the user
// dragged a scrollbar (necessary for Opera Presto, Safari and IE)
// (not needed for Chrome/Firefox)
this.element.addEventListener('scroll', this._endPan, true);
event.preventDefault();
event.stopPropagation();
this.element.classList.remove(this.CSS_CLASS_GRAB);
this.document.documentElement.classList.add(this.CSS_CLASS_GRABBING);
},
/**
* @private
*/
_onmousemove: function GrabToPan__onmousemove(event) {
this.element.removeEventListener('scroll', this._endPan, true);
if (isLeftMouseReleased(event)) {
this.document.removeEventListener('mousemove', this._onmousemove, true);
return;
}
var xDiff = event.clientX - this.clientXStart;
var yDiff = event.clientY - this.clientYStart;
this.element.scrollTop = this.scrollTopStart - yDiff;
this.element.scrollLeft = this.scrollLeftStart - xDiff;
},
/**
* @private
*/
_endPan: function GrabToPan__endPan() {
this.element.removeEventListener('scroll', this._endPan, true);
this.document.removeEventListener('mousemove', this._onmousemove, true);
this.document.removeEventListener('mouseup', this._endPan, true);
this.document.documentElement.classList.remove(this.CSS_CLASS_GRABBING);
this.element.classList.add(this.CSS_CLASS_GRAB);
}
};
// Get the correct (vendor-prefixed) name of the matches method.
var matchesSelector;
['webkitM', 'mozM', 'msM', 'oM', 'm'].some(function(prefix) {
var name = prefix + 'atches';
if (name in document.documentElement) {
matchesSelector = name;
}
name += 'Selector';
if (name in document.documentElement) {
matchesSelector = name;
}
return matchesSelector; // If found, then truthy, and [].some() ends.
});
// Browser sniffing because it's impossible to feature-detect
// whether event.which for onmousemove is reliable
var isNotIEorIsIE10plus = !document.documentMode || document.documentMode > 9;
var chrome = window.chrome;
var isChrome15OrOpera15plus = chrome && (chrome.webstore || chrome.app);
// ^ Chrome 15+ ^ Opera 15+
var isSafari6plus = /Apple/.test(navigator.vendor) &&
/Version\/([6-9]\d*|[1-5]\d+)/.test(navigator.userAgent);
/**
* Whether the left mouse is not pressed.
* @param event {MouseEvent}
* @return {boolean} True if the left mouse button is not pressed.
* False if unsure or if the left mouse button is pressed.
*/
function isLeftMouseReleased(event) {
if ('buttons' in event && isNotIEorIsIE10plus) {
// http://www.w3.org/TR/DOM-Level-3-Events/#events-MouseEvent-buttons
// Firefox 15+
// Internet Explorer 10+
return !(event.buttons | 1);
}
if (isChrome15OrOpera15plus || isSafari6plus) {
// Chrome 14+
// Opera 15+
// Safari 6.0+
return event.which === 0;
}
}
return GrabToPan;
})();
var HandTool = {
initialize: function handToolInitialize(options) {
var toggleHandTool = options.toggleHandTool;
this.handTool = new GrabToPan({
element: options.container,
onActiveChanged: function(isActive) {
if (!toggleHandTool) {
return;
}
if (isActive) {
toggleHandTool.title =
mozL10n.get('hand_tool_disable.title', null, 'Disable hand tool');
toggleHandTool.firstElementChild.textContent =
mozL10n.get('hand_tool_disable_label', null, 'Disable hand tool');
} else {
toggleHandTool.title =
mozL10n.get('hand_tool_enable.title', null, 'Enable hand tool');
toggleHandTool.firstElementChild.textContent =
mozL10n.get('hand_tool_enable_label', null, 'Enable hand tool');
}
}
});
if (toggleHandTool) {
toggleHandTool.addEventListener('click', this.handTool.toggle, false);
}
// TODO: Read global prefs and call this.handTool.activate() if needed.
},
toggle: function handToolToggle() {
this.handTool.toggle();
},
enterPresentationMode: function handToolEnterPresentationMode() {
if (this.handTool.active) {
this.wasActive = true;
this.handTool.deactivate();
}
},
exitPresentationMode: function handToolExitPresentationMode() {
if (this.wasActive) {
this.wasActive = null;
this.handTool.activate();
}
}
};
var PDFView = {
pages: [],
thumbnails: [],
currentScale: UNKNOWN_SCALE,
currentScaleValue: null,
initialBookmark: document.location.hash.substring(1),
container: null,
thumbnailContainer: null,
initialized: false,
fellback: false,
pdfDocument: null,
sidebarOpen: false,
pageViewScroll: null,
thumbnailViewScroll: null,
pageRotation: 0,
mouseScrollTimeStamp: 0,
mouseScrollDelta: 0,
lastScroll: 0,
previousPageNumber: 1,
isViewerEmbedded: (window.parent !== window),
idleTimeout: null,
// called once when the document is loaded
initialize: function pdfViewInitialize() {
var self = this;
var container = this.container = document.getElementById('viewerContainer');
this.pageViewScroll = {};
this.watchScroll(container, this.pageViewScroll, updateViewarea);
var thumbnailContainer = this.thumbnailContainer =
document.getElementById('thumbnailView');
this.thumbnailViewScroll = {};
this.watchScroll(thumbnailContainer, this.thumbnailViewScroll,
this.renderHighestPriority.bind(this));
PDFFindBar.initialize({
bar: document.getElementById('findbar'),
toggleButton: document.getElementById('viewFind'),
findField: document.getElementById('findInput'),
highlightAllCheckbox: document.getElementById('findHighlightAll'),
caseSensitiveCheckbox: document.getElementById('findMatchCase'),
findMsg: document.getElementById('findMsg'),
findStatusIcon: document.getElementById('findStatusIcon'),
findPreviousButton: document.getElementById('findPrevious'),
findNextButton: document.getElementById('findNext')
});
PDFFindController.initialize({
pdfPageSource: this,
integratedFind: this.supportsIntegratedFind
});
HandTool.initialize({
container: container,
toggleHandTool: document.getElementById('toggleHandTool')
});
SecondaryToolbar.initialize({
toolbar: document.getElementById('secondaryToolbar'),
presentationMode: PresentationMode,
toggleButton: document.getElementById('secondaryToolbarToggle'),
presentationModeButton:
document.getElementById('secondaryPresentationMode'),
openFile: document.getElementById('secondaryOpenFile'),
print: document.getElementById('secondaryPrint'),
download: document.getElementById('secondaryDownload'),
firstPage: document.getElementById('firstPage'),
lastPage: document.getElementById('lastPage'),
pageRotateCw: document.getElementById('pageRotateCw'),
pageRotateCcw: document.getElementById('pageRotateCcw')
});
PasswordPrompt.initialize({
overlayContainer: document.getElementById('overlayContainer'),
passwordField: document.getElementById('password'),
passwordText: document.getElementById('passwordText'),
passwordSubmit: document.getElementById('passwordSubmit'),
passwordCancel: document.getElementById('passwordCancel')
});
PresentationMode.initialize({
container: container,
secondaryToolbar: SecondaryToolbar,
firstPage: document.getElementById('contextFirstPage'),
lastPage: document.getElementById('contextLastPage'),
pageRotateCw: document.getElementById('contextPageRotateCw'),
pageRotateCcw: document.getElementById('contextPageRotateCcw')
});
this.initialized = true;
container.addEventListener('scroll', function() {
self.lastScroll = Date.now();
}, false);
},
getPage: function pdfViewGetPage(n) {
return this.pdfDocument.getPage(n);
},
// Helper function to keep track whether a div was scrolled up or down and
// then call a callback.
watchScroll: function pdfViewWatchScroll(viewAreaElement, state, callback) {
state.down = true;
state.lastY = viewAreaElement.scrollTop;
viewAreaElement.addEventListener('scroll', function webViewerScroll(evt) {
var currentY = viewAreaElement.scrollTop;
var lastY = state.lastY;
if (currentY > lastY)
state.down = true;
else if (currentY < lastY)
state.down = false;
// else do nothing and use previous value
state.lastY = currentY;
callback();
}, true);
},
_setScaleUpdatePages: function pdfView_setScaleUpdatePages(
newScale, newValue, resetAutoSettings, noScroll) {
this.currentScaleValue = newValue;
if (newScale === this.currentScale) {
return;
}
for (var i = 0, ii = this.pages.length; i < ii; i++) {
this.pages[i].update(newScale);
}
this.currentScale = newScale;
if (!noScroll) {
this.pages[this.page - 1].scrollIntoView();
}
var event = document.createEvent('UIEvents');
event.initUIEvent('scalechange', false, false, window, 0);
event.scale = newScale;
event.resetAutoSettings = resetAutoSettings;
window.dispatchEvent(event);
},
setScale: function pdfViewSetScale(value, resetAutoSettings, noScroll) {
if (value === 'custom') {
return;
}
var scale = parseFloat(value);
if (scale > 0) {
this._setScaleUpdatePages(scale, value, true, noScroll);
} else {
var currentPage = this.pages[this.page - 1];
if (!currentPage) {
return;
}
var pageWidthScale = (this.container.clientWidth - SCROLLBAR_PADDING) /
currentPage.width * currentPage.scale;
var pageHeightScale = (this.container.clientHeight - VERTICAL_PADDING) /
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':
scale = Math.min(MAX_AUTO_SCALE, pageWidthScale);
break;
default:
console.error('pdfViewSetScale: \'' + value +
'\' is an unknown zoom value.');
return;
}
this._setScaleUpdatePages(scale, value, resetAutoSettings, noScroll);
selectScaleOption(value);
}
},
zoomIn: function pdfViewZoomIn(ticks) {
var newScale = this.currentScale;
do {
newScale = (newScale * DEFAULT_SCALE_DELTA).toFixed(2);
newScale = Math.ceil(newScale * 10) / 10;
newScale = Math.min(MAX_SCALE, newScale);
} while (--ticks && newScale < MAX_SCALE);
this.setScale(newScale, true);
},
zoomOut: function pdfViewZoomOut(ticks) {
var newScale = this.currentScale;
do {
newScale = (newScale / DEFAULT_SCALE_DELTA).toFixed(2);
newScale = Math.floor(newScale * 10) / 10;
newScale = Math.max(MIN_SCALE, newScale);
} while (--ticks && newScale > MIN_SCALE);
this.setScale(newScale, true);
},
set page(val) {
var pages = this.pages;
var event = document.createEvent('UIEvents');
event.initUIEvent('pagechange', false, false, window, 0);
if (!(0 < val && val <= pages.length)) {
this.previousPageNumber = val;
event.pageNumber = this.page;
window.dispatchEvent(event);
return;
}
pages[val - 1].updateStats();
this.previousPageNumber = currentPageNumber;
currentPageNumber = val;
event.pageNumber = val;
window.dispatchEvent(event);
// checking if the this.page was called from the updateViewarea function:
// avoiding the creation of two "set page" method (internal and public)
if (updateViewarea.inProgress) {
return;
}
// Avoid scrolling the first page during loading
if (this.loading && val === 1) {
return;
}
pages[val - 1].scrollIntoView();
},
get page() {
return currentPageNumber;
},
get supportsPrinting() {
var canvas = document.createElement('canvas');
var value = 'mozPrintCallback' in canvas;
// shadow
Object.defineProperty(this, 'supportsPrinting', { value: value,
enumerable: true,
configurable: true,
writable: false });
return value;
},
get supportsFullscreen() {
var doc = document.documentElement;
var support = doc.requestFullscreen || doc.mozRequestFullScreen ||
doc.webkitRequestFullScreen || doc.msRequestFullscreen;
if (document.fullscreenEnabled === false ||
document.mozFullScreenEnabled === false ||
document.webkitFullscreenEnabled === false ||
document.msFullscreenEnabled === false) {
support = false;
} else if (this.isViewerEmbedded) {
// Need to check if the viewer is embedded as well, to prevent issues with
// presentation mode when the viewer is embedded in '<object>' tags.
support = false;
}
Object.defineProperty(this, 'supportsFullscreen', { value: support,
enumerable: true,
configurable: true,
writable: false });
return support;
},
get supportsIntegratedFind() {
var support = false;
Object.defineProperty(this, 'supportsIntegratedFind', { value: support,
enumerable: true,
configurable: true,
writable: false });
return support;
},
get supportsDocumentFonts() {
var support = true;
Object.defineProperty(this, 'supportsDocumentFonts', { value: support,
enumerable: true,
configurable: true,
writable: false });
return support;
},
get supportsDocumentColors() {
var support = true;
Object.defineProperty(this, 'supportsDocumentColors', { value: support,
enumerable: true,
configurable: true,
writable: false });
return support;
},
get loadingBar() {
var bar = new ProgressBar('#loadingBar', {});
Object.defineProperty(this, 'loadingBar', { value: bar,
enumerable: true,
configurable: true,
writable: false });
return bar;
},
get isHorizontalScrollbarEnabled() {
return (PresentationMode.active ? false :
(this.container.scrollWidth > this.container.clientWidth));
},
initPassiveLoading: function pdfViewInitPassiveLoading() {
var pdfDataRangeTransport = {
rangeListeners: [],
progressListeners: [],
addRangeListener: function PdfDataRangeTransport_addRangeListener(
listener) {
this.rangeListeners.push(listener);
},
addProgressListener: function PdfDataRangeTransport_addProgressListener(
listener) {
this.progressListeners.push(listener);
},
onDataRange: function PdfDataRangeTransport_onDataRange(begin, chunk) {
var listeners = this.rangeListeners;
for (var i = 0, n = listeners.length; i < n; ++i) {
listeners[i](begin, chunk);
}
},
onDataProgress: function PdfDataRangeTransport_onDataProgress(loaded) {
var listeners = this.progressListeners;
for (var i = 0, n = listeners.length; i < n; ++i) {
listeners[i](loaded);
}
},
requestDataRange: function PdfDataRangeTransport_requestDataRange(
begin, end) {
FirefoxCom.request('requestDataRange', { begin: begin, end: end });
}
};
window.addEventListener('message', function windowMessage(e) {
var args = e.data;
if (typeof args !== 'object' || !('pdfjsLoadAction' in args))
return;
switch (args.pdfjsLoadAction) {
case 'supportsRangedLoading':
PDFView.open(args.pdfUrl, 0, undefined, pdfDataRangeTransport, {
length: args.length,
initialData: args.data
});
break;
case 'range':
pdfDataRangeTransport.onDataRange(args.begin, args.chunk);
break;
case 'rangeProgress':
pdfDataRangeTransport.onDataProgress(args.loaded);
break;
case 'progress':
PDFView.progress(args.loaded / args.total);
break;
case 'complete':
if (!args.data) {
PDFView.error(mozL10n.get('loading_error', null,
'An error occurred while loading the PDF.'), e);
break;
}
PDFView.open(args.data, 0);
break;
}
});
FirefoxCom.requestSync('initPassiveLoading', null);
},
setTitleUsingUrl: function pdfViewSetTitleUsingUrl(url) {
this.url = url;
try {
this.setTitle(decodeURIComponent(getFileName(url)) || url);
} catch (e) {
// decodeURIComponent may throw URIError,
// fall back to using the unprocessed url in that case
this.setTitle(url);
}
},
setTitle: function pdfViewSetTitle(title) {
document.title = title;
},
// TODO(mack): This function signature should really be pdfViewOpen(url, args)
open: function pdfViewOpen(url, scale, password,
pdfDataRangeTransport, args) {
var parameters = {password: password};
if (typeof url === 'string') { // URL
this.setTitleUsingUrl(url);
parameters.url = url;
} else if (url && 'byteLength' in url) { // ArrayBuffer
parameters.data = url;
}
if (args) {
for (var prop in args) {
parameters[prop] = args[prop];
}
}
this.pdfDocument = null;
var self = this;
self.loading = true;
var passwordNeeded = function passwordNeeded(updatePassword, reason) {
PasswordPrompt.updatePassword = updatePassword;
PasswordPrompt.reason = reason;
PasswordPrompt.show();
};
function getDocumentProgress(progressData) {
self.progress(progressData.loaded / progressData.total);
}
PDFJS.getDocument(parameters, pdfDataRangeTransport, passwordNeeded,
getDocumentProgress).then(
function getDocumentCallback(pdfDocument) {
self.load(pdfDocument, scale);
self.loading = false;
},
function getDocumentError(message, exception) {
var loadingErrorMessage = mozL10n.get('loading_error', null,
'An error occurred while loading the PDF.');
if (exception && exception.name === 'InvalidPDFException') {
// change error message also for other builds
var loadingErrorMessage = mozL10n.get('invalid_file_error', null,
'Invalid or corrupted PDF file.');
}
if (exception && exception.name === 'MissingPDFException') {
// special message for missing PDF's
var loadingErrorMessage = mozL10n.get('missing_file_error', null,
'Missing PDF file.');
}
var moreInfo = {
message: message
};
self.error(loadingErrorMessage, moreInfo);
self.loading = false;
}
);
},
download: function pdfViewDownload() {
function noData() {
downloadManager.downloadUrl(url, filename);
}
var url = this.url.split('#')[0];
var filename = getPDFFileNameFromURL(url);
var downloadManager = new DownloadManager();
downloadManager.onerror = function (err) {
// This error won't really be helpful because it's likely the
// fallback won't work either (or is already open).
PDFView.error('PDF failed to download.');
};
if (!this.pdfDocument) { // the PDF is not ready yet
noData();
return;
}
this.pdfDocument.getData().then(
function getDataSuccess(data) {
var blob = PDFJS.createBlob(data, 'application/pdf');
downloadManager.download(blob, url, filename);
},
noData // Error occurred try downloading with just the url.
).then(null, noData);
},
fallback: function pdfViewFallback(featureId) {
return;
},
navigateTo: function pdfViewNavigateTo(dest) {
var destString = '';
var self = this;
var goToDestination = function(destRef) {
self.pendingRefStr = null;
// dest array looks like that: <page-ref> </XYZ|FitXXX> <args..>
var pageNumber = destRef instanceof Object ?
self.pagesRefMap[destRef.num + ' ' + destRef.gen + ' R'] :
(destRef + 1);
if (pageNumber) {
if (pageNumber > self.pages.length) {
pageNumber = self.pages.length;
}
var currentPage = self.pages[pageNumber - 1];
currentPage.scrollIntoView(dest);
// Update the browsing history.
PDFHistory.push({ dest: dest, hash: destString, page: pageNumber });
} else {
self.pdfDocument.getPageIndex(destRef).then(function (pageIndex) {
var pageNum = pageIndex + 1;
self.pagesRefMap[destRef.num + ' ' + destRef.gen + ' R'] = pageNum;
goToDestination(destRef);
});
}
};
this.destinationsPromise.then(function() {
if (typeof dest === 'string') {
destString = dest;
dest = self.destinations[dest];
}
if (!(dest instanceof Array)) {
return; // invalid destination
}
goToDestination(dest[0]);
});
},
getDestinationHash: function pdfViewGetDestinationHash(dest) {
if (typeof dest === 'string')
return PDFView.getAnchorUrl('#' + escape(dest));
if (dest instanceof Array) {
var destRef = dest[0]; // see navigateTo method for dest format
var pageNumber = destRef instanceof Object ?
this.pagesRefMap[destRef.num + ' ' + destRef.gen + ' R'] :
(destRef + 1);
if (pageNumber) {
var pdfOpenParams = PDFView.getAnchorUrl('#page=' + pageNumber);
var destKind = dest[1];
if (typeof destKind === 'object' && 'name' in destKind &&
destKind.name == 'XYZ') {
var scale = (dest[4] || this.currentScaleValue);
var scaleNumber = parseFloat(scale);
if (scaleNumber) {
scale = scaleNumber * 100;
}
pdfOpenParams += '&zoom=' + scale;
if (dest[2] || dest[3]) {
pdfOpenParams += ',' + (dest[2] || 0) + ',' + (dest[3] || 0);
}
}
return pdfOpenParams;
}
}
return '';
},
/**
* 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 #.
*/
getAnchorUrl: function getAnchorUrl(anchor) {
return anchor;
},
/**
* Show the error box.
* @param {String} message A message that is human readable.
* @param {Object} moreInfo (optional) Further information about the error
* that is more technical. Should have a 'message'
* and optionally a 'stack' property.
*/
error: function pdfViewError(message, moreInfo) {
var moreInfoText = mozL10n.get('error_version_info',
{version: PDFJS.version || '?', build: PDFJS.build || '?'},
'PDF.js v{{version}} (build: {{build}})') + '\n';
if (moreInfo) {
moreInfoText +=
mozL10n.get('error_message', {message: moreInfo.message},
'Message: {{message}}');
if (moreInfo.stack) {
moreInfoText += '\n' +
mozL10n.get('error_stack', {stack: moreInfo.stack},
'Stack: {{stack}}');
} else {
if (moreInfo.filename) {
moreInfoText += '\n' +
mozL10n.get('error_file', {file: moreInfo.filename},
'File: {{file}}');
}
if (moreInfo.lineNumber) {
moreInfoText += '\n' +
mozL10n.get('error_line', {line: moreInfo.lineNumber},
'Line: {{line}}');
}
}
}
var errorWrapper = document.getElementById('errorWrapper');
errorWrapper.removeAttribute('hidden');
var errorMessage = document.getElementById('errorMessage');
errorMessage.textContent = message;
var closeButton = document.getElementById('errorClose');
closeButton.onclick = function() {
errorWrapper.setAttribute('hidden', 'true');
};
var errorMoreInfo = document.getElementById('errorMoreInfo');
var moreInfoButton = document.getElementById('errorShowMore');
var lessInfoButton = document.getElementById('errorShowLess');
moreInfoButton.onclick = function() {
errorMoreInfo.removeAttribute('hidden');
moreInfoButton.setAttribute('hidden', 'true');
lessInfoButton.removeAttribute('hidden');
errorMoreInfo.style.height = errorMoreInfo.scrollHeight + 'px';
};
lessInfoButton.onclick = function() {
errorMoreInfo.setAttribute('hidden', 'true');
moreInfoButton.removeAttribute('hidden');
lessInfoButton.setAttribute('hidden', 'true');
};
moreInfoButton.oncontextmenu = noContextMenuHandler;
lessInfoButton.oncontextmenu = noContextMenuHandler;
closeButton.oncontextmenu = noContextMenuHandler;
moreInfoButton.removeAttribute('hidden');
lessInfoButton.setAttribute('hidden', 'true');
errorMoreInfo.value = moreInfoText;
},
progress: function pdfViewProgress(level) {
var percent = Math.round(level * 100);
// When we transition from full request to range requests, it's possible
// that we discard some of the loaded data. This can cause the loading
// bar to move backwards. So prevent this by only updating the bar if it
// increases.
if (percent > PDFView.loadingBar.percent) {
PDFView.loadingBar.percent = percent;
}
},
load: function pdfViewLoad(pdfDocument, scale) {
var self = this;
var isOnePageRenderedResolved = false;
var resolveOnePageRendered = null;
var onePageRendered = new Promise(function (resolve) {
resolveOnePageRendered = resolve;
});
function bindOnAfterDraw(pageView, thumbnailView) {
// when page is painted, using the image as thumbnail base
pageView.onAfterDraw = function pdfViewLoadOnAfterDraw() {
if (!isOnePageRenderedResolved) {
isOnePageRenderedResolved = true;
resolveOnePageRendered();
}
thumbnailView.setImage(pageView.canvas);
};
}
PDFFindController.reset();
this.pdfDocument = pdfDocument;
var errorWrapper = document.getElementById('errorWrapper');
errorWrapper.setAttribute('hidden', 'true');
pdfDocument.dataLoaded().then(function() {
PDFView.loadingBar.hide();
var outerContainer = document.getElementById('outerContainer');
outerContainer.classList.remove('loadingInProgress');
});
var thumbsView = document.getElementById('thumbnailView');
thumbsView.parentNode.scrollTop = 0;
while (thumbsView.hasChildNodes())
thumbsView.removeChild(thumbsView.lastChild);
if ('_loadingInterval' in thumbsView)
clearInterval(thumbsView._loadingInterval);
var container = document.getElementById('viewer');
while (container.hasChildNodes())
container.removeChild(container.lastChild);
var pagesCount = pdfDocument.numPages;
var id = pdfDocument.fingerprint;
document.getElementById('numPages').textContent =
mozL10n.get('page_of', {pageCount: pagesCount}, 'of {{pageCount}}');
document.getElementById('pageNumber').max = pagesCount;
var prefs = PDFView.prefs = new Preferences();
PDFView.documentFingerprint = id;
var store = PDFView.store = new ViewHistory(id);
this.pageRotation = 0;
var pages = this.pages = [];
var pagesRefMap = this.pagesRefMap = {};
var thumbnails = this.thumbnails = [];
var resolvePagesPromise;
var pagesPromise = new Promise(function (resolve) {
resolvePagesPromise = resolve;
});
this.pagesPromise = pagesPromise;
var firstPagePromise = pdfDocument.getPage(1);
// Fetch a single page so we can get a viewport that will be the default
// viewport for all pages
firstPagePromise.then(function(pdfPage) {
var viewport = pdfPage.getViewport((scale || 1.0) * CSS_UNITS);
for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
var viewportClone = viewport.clone();
var pageView = new PageView(container, pageNum, scale,
self.navigateTo.bind(self),
viewportClone);
var thumbnailView = new ThumbnailView(thumbsView, pageNum,
viewportClone);
bindOnAfterDraw(pageView, thumbnailView);
pages.push(pageView);
thumbnails.push(thumbnailView);
}
// 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 (!PDFJS.disableAutoFetch) {
var getPagesLeft = pagesCount;
for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
pdfDocument.getPage(pageNum).then(function (pageNum, pdfPage) {
var pageView = pages[pageNum - 1];
if (!pageView.pdfPage) {
pageView.setPdfPage(pdfPage);
}
var refStr = pdfPage.ref.num + ' ' + pdfPage.ref.gen + ' R';
pagesRefMap[refStr] = pageNum;
getPagesLeft--;
if (!getPagesLeft) {
resolvePagesPromise();
}
}.bind(null, pageNum));
}
} else {
// XXX: Printing is semi-broken with auto fetch disabled.
resolvePagesPromise();
}
});
var event = document.createEvent('CustomEvent');
event.initCustomEvent('documentload', true, true, {});
window.dispatchEvent(event);
PDFView.loadingBar.setWidth(container);
PDFFindController.resolveFirstPage();
});
var prefsPromise = prefs.initializedPromise;
var storePromise = store.initializedPromise;
Promise.all([firstPagePromise, prefsPromise, storePromise]).
then(function() {
var showPreviousViewOnLoad = prefs.get('showPreviousViewOnLoad');
var defaultZoomValue = prefs.get('defaultZoomValue');
var storedHash = null;
if (showPreviousViewOnLoad && store.get('exists', false)) {
var pageNum = store.get('page', '1');
var zoom = defaultZoomValue || store.get('zoom', PDFView.currentScale);
var left = store.get('scrollLeft', '0');
var top = store.get('scrollTop', '0');
storedHash = 'page=' + pageNum + '&zoom=' + zoom + ',' +
left + ',' + top;
} else if (defaultZoomValue) {
storedHash = 'page=1&zoom=' + defaultZoomValue;
}
// Initialize the browsing history.
PDFHistory.initialize(self.documentFingerprint);
self.setInitialView(storedHash, scale);
// Make all navigation keys work on document load,
// unless the viewer is embedded in a web page.
if (!self.isViewerEmbedded) {
self.container.focus();
}
});
pagesPromise.then(function() {
if (PDFView.supportsPrinting) {
pdfDocument.getJavaScript().then(function(javaScript) {
if (javaScript.length) {
console.warn('Warning: JavaScript is not supported');
PDFView.fallback(PDFJS.UNSUPPORTED_FEATURES.javaScript);
}
// Hack to support auto printing.
var regex = /\bprint\s*\(/g;
for (var i = 0, ii = javaScript.length; i < ii; i++) {
var js = javaScript[i];
if (js && regex.test(js)) {
setTimeout(function() {
window.print();
});
return;
}
}
});
}
});
var destinationsPromise =
this.destinationsPromise = pdfDocument.getDestinations();
destinationsPromise.then(function(destinations) {
self.destinations = destinations;
});
// outline depends on destinations and pagesRefMap
var promises = [pagesPromise, destinationsPromise,
PDFView.animationStartedPromise];
Promise.all(promises).then(function() {
pdfDocument.getOutline().then(function(outline) {
self.outline = new DocumentOutlineView(outline);
document.getElementById('viewOutline').disabled = !outline;
if (outline && prefs.get('ifAvailableShowOutlineOnLoad')) {
if (!self.sidebarOpen) {
document.getElementById('sidebarToggle').click();
}
self.switchSidebarView('outline');
}
});
});
pdfDocument.getMetadata().then(function(data) {
var info = data.info, metadata = data.metadata;
self.documentInfo = info;
self.metadata = metadata;
// Provides some basic debug information
console.log('PDF ' + pdfDocument.fingerprint + ' [' +
info.PDFFormatVersion + ' ' + (info.Producer || '-') +
' / ' + (info.Creator || '-') + ']' +
(PDFJS.version ? ' (PDF.js: ' + PDFJS.version + ')' : ''));
var pdfTitle;
if (metadata) {
if (metadata.has('dc:title'))
pdfTitle = metadata.get('dc:title');
}
if (!pdfTitle && info && info['Title'])
pdfTitle = info['Title'];
if (pdfTitle)
self.setTitle(pdfTitle + ' - ' + document.title);
if (info.IsAcroFormPresent) {
console.warn('Warning: AcroForm/XFA is not supported');
PDFView.fallback(PDFJS.UNSUPPORTED_FEATURES.forms);
}
});
},
setInitialView: function pdfViewSetInitialView(storedHash, scale) {
// Reset the current scale, as otherwise the page's scale might not get
// updated if the zoom level stayed the same.
this.currentScale = 0;
this.currentScaleValue = null;
// When opening a new file (when one is already loaded in the viewer):
// Reset 'currentPageNumber', since otherwise the page's scale will be wrong
// if 'currentPageNumber' is larger than the number of pages in the file.
document.getElementById('pageNumber').value = currentPageNumber = 1;
if (PDFHistory.initialDestination) {
this.navigateTo(PDFHistory.initialDestination);
PDFHistory.initialDestination = null;
} else if (this.initialBookmark) {
this.setHash(this.initialBookmark);
PDFHistory.push({ hash: this.initialBookmark }, !!this.initialBookmark);
this.initialBookmark = null;
} else if (storedHash) {
this.setHash(storedHash);
} else if (scale) {
this.setScale(scale, true);
this.page = 1;
}
if (PDFView.currentScale === UNKNOWN_SCALE) {
// Scale was not initialized: invalid bookmark or scale was not specified.
// Setting the default one.
this.setScale(DEFAULT_SCALE, true);
}
},
renderHighestPriority: function pdfViewRenderHighestPriority() {
if (PDFView.idleTimeout) {
clearTimeout(PDFView.idleTimeout);
PDFView.idleTimeout = null;
}
// Pages have a higher priority than thumbnails, so check them first.
var visiblePages = this.getVisiblePages();
var pageView = this.getHighestPriority(visiblePages, this.pages,
this.pageViewScroll.down);
if (pageView) {
this.renderView(pageView, 'page');
return;
}
// No pages needed rendering so check thumbnails.
if (this.sidebarOpen) {
var visibleThumbs = this.getVisibleThumbs();
var thumbView = this.getHighestPriority(visibleThumbs,
this.thumbnails,
this.thumbnailViewScroll.down);
if (thumbView) {
this.renderView(thumbView, 'thumbnail');
return;
}
}
PDFView.idleTimeout = setTimeout(function () {
PDFView.cleanup();
}, CLEANUP_TIMEOUT);
},
cleanup: function pdfViewCleanup() {
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();
}
}
this.pdfDocument.cleanup();
},
getHighestPriority: function pdfViewGetHighestPriority(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 false;
},
isViewFinished: function pdfViewIsViewFinished(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.
renderView: function pdfViewRender(view, type) {
var state = view.renderingState;
switch (state) {
case RenderingStates.FINISHED:
return false;
case RenderingStates.PAUSED:
PDFView.highestPriorityPage = type + view.id;
view.resume();
break;
case RenderingStates.RUNNING:
PDFView.highestPriorityPage = type + view.id;
break;
case RenderingStates.INITIAL:
PDFView.highestPriorityPage = type + view.id;
view.draw(this.renderHighestPriority.bind(this));
break;
}
return true;
},
setHash: function pdfViewSetHash(hash) {
if (!hash)
return;
if (hash.indexOf('=') >= 0) {
var params = PDFView.parseQueryString(hash);
// borrowing syntax from "Parameters for Opening PDF Files"
if ('nameddest' in params) {
PDFHistory.updateNextHashParam(params.nameddest);
PDFView.navigateTo(params.nameddest);
return;
}
var pageNumber, dest;
if ('page' in params) {
pageNumber = (params.page | 0) || 1;
}
if ('zoom' in params) {
var zoomArgs = params.zoom.split(','); // scale,left,top
// building destination array
// If the zoom value, it has to get divided by 100. If it is a string,
// it should stay as it is.
var zoomArg = zoomArgs[0];
var zoomArgNumber = parseFloat(zoomArg);
if (zoomArgNumber) {
zoomArg = zoomArgNumber / 100;
}
dest = [null, {name: 'XYZ'},
zoomArgs.length > 1 ? (zoomArgs[1] | 0) : null,
zoomArgs.length > 2 ? (zoomArgs[2] | 0) : null,
zoomArg];
}
if (dest) {
var currentPage = this.pages[(pageNumber || this.page) - 1];
currentPage.scrollIntoView(dest);
} else if (pageNumber) {
this.page = pageNumber; // simple page
}
if ('pagemode' in params) {
var toggle = document.getElementById('sidebarToggle');
if (params.pagemode === 'thumbs' || params.pagemode === 'bookmarks') {
if (!this.sidebarOpen) {
toggle.click();
}
this.switchSidebarView(params.pagemode === 'thumbs' ?
'thumbs' : 'outline');
} else if (params.pagemode === 'none' && this.sidebarOpen) {
toggle.click();
}
}
} else if (/^\d+$/.test(hash)) { // page number
this.page = hash;
} else { // named destination
PDFHistory.updateNextHashParam(unescape(hash));
PDFView.navigateTo(unescape(hash));
}
},
switchSidebarView: function pdfViewSwitchSidebarView(view) {
var thumbsView = document.getElementById('thumbnailView');
var outlineView = document.getElementById('outlineView');
var thumbsButton = document.getElementById('viewThumbnail');
var outlineButton = document.getElementById('viewOutline');
switch (view) {
case 'thumbs':
var wasOutlineViewVisible = thumbsView.classList.contains('hidden');
thumbsButton.classList.add('toggled');
outlineButton.classList.remove('toggled');
thumbsView.classList.remove('hidden');
outlineView.classList.add('hidden');
PDFView.renderHighestPriority();
if (wasOutlineViewVisible) {
// Ensure that the thumbnail of the current page is visible
// when switching from the outline view.
scrollIntoView(document.getElementById('thumbnailContainer' +
this.page));
}
break;
case 'outline':
thumbsButton.classList.remove('toggled');
outlineButton.classList.add('toggled');
thumbsView.classList.add('hidden');
outlineView.classList.remove('hidden');
if (outlineButton.getAttribute('disabled'))
return;
break;
}
},
getVisiblePages: function pdfViewGetVisiblePages() {
return this.getVisibleElements(this.container, this.pages,
!PresentationMode.active);
},
getVisibleThumbs: function pdfViewGetVisibleThumbs() {
return this.getVisibleElements(this.thumbnailContainer, this.thumbnails);
},
// Generic helper to find out what elements are visible within a scroll pane.
getVisibleElements: function pdfViewGetVisibleElements(
scrollEl, views, sortByVisibility) {
var top = scrollEl.scrollTop, bottom = top + scrollEl.clientHeight;
var left = scrollEl.scrollLeft, right = left + scrollEl.clientWidth;
var visible = [], view;
var currentHeight, viewHeight, hiddenHeight, percentHeight;
var currentWidth, viewWidth;
for (var i = 0, ii = views.length; i < ii; ++i) {
view = views[i];
currentHeight = view.el.offsetTop + view.el.clientTop;
viewHeight = view.el.clientHeight;
if ((currentHeight + viewHeight) < top) {
continue;
}
if (currentHeight > bottom) {
break;
}
currentWidth = view.el.offsetLeft + view.el.clientLeft;
viewWidth = view.el.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, 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};
},
// Helper function to parse query string (e.g. ?param1=value&parm2=...).
parseQueryString: function pdfViewParseQueryString(query) {
var parts = query.split('&');
var params = {};
for (var i = 0, ii = parts.length; i < parts.length; ++i) {
var param = parts[i].split('=');
var key = param[0];
var value = param.length > 1 ? param[1] : null;
params[decodeURIComponent(key)] = decodeURIComponent(value);
}
return params;
},
beforePrint: function pdfViewSetupBeforePrint() {
if (!this.supportsPrinting) {
var printMessage = mozL10n.get('printing_not_supported', null,
'Warning: Printing is not fully supported by this browser.');
this.error(printMessage);
return;
}
var alertNotReady = false;
if (!this.pages.length) {
alertNotReady = true;
} else {
for (var i = 0, ii = this.pages.length; i < ii; ++i) {
if (!this.pages[i].pdfPage) {
alertNotReady = true;
break;
}
}
}
if (alertNotReady) {
var notReadyMessage = mozL10n.get('printing_not_ready', null,
'Warning: The PDF is not fully loaded for printing.');
window.alert(notReadyMessage);
return;
}
var body = document.querySelector('body');
body.setAttribute('data-mozPrintCallback', true);
for (var i = 0, ii = this.pages.length; i < ii; ++i) {
this.pages[i].beforePrint();
}
},
afterPrint: function pdfViewSetupAfterPrint() {
var div = document.getElementById('printContainer');
while (div.hasChildNodes())
div.removeChild(div.lastChild);
},
rotatePages: function pdfViewRotatePages(delta) {
this.pageRotation = (this.pageRotation + 360 + delta) % 360;
for (var i = 0, l = this.pages.length; i < l; i++) {
var page = this.pages[i];
page.update(page.scale, this.pageRotation);
}
for (var i = 0, l = this.thumbnails.length; i < l; i++) {
var thumb = this.thumbnails[i];
thumb.update(this.pageRotation);
}
this.setScale(this.currentScaleValue, true);
this.renderHighestPriority();
var currentPage = this.pages[this.page - 1];
if (!currentPage) {
return;
}
// Wait for presentation mode to take effect
setTimeout(function() {
currentPage.scrollIntoView();
}, 0);
},
/**
* This function flips the page in presentation mode if the user scrolls up
* or down with large enough motion and prevents page flipping too often.
*
* @this {PDFView}
* @param {number} mouseScrollDelta The delta value from the mouse event.
*/
mouseScroll: function pdfViewMouseScroll(mouseScrollDelta) {
var MOUSE_SCROLL_COOLDOWN_TIME = 50;
var currentTime = (new Date()).getTime();
var storedTime = this.mouseScrollTimeStamp;
// In case one page has already been flipped there is a cooldown time
// which has to expire before next page can be scrolled on to.
if (currentTime > storedTime &&
currentTime - storedTime < MOUSE_SCROLL_COOLDOWN_TIME)
return;
// In case the user decides to scroll to the opposite direction than before
// clear the accumulated delta.
if ((this.mouseScrollDelta > 0 && mouseScrollDelta < 0) ||
(this.mouseScrollDelta < 0 && mouseScrollDelta > 0))
this.clearMouseScrollState();
this.mouseScrollDelta += mouseScrollDelta;
var PAGE_FLIP_THRESHOLD = 120;
if (Math.abs(this.mouseScrollDelta) >= PAGE_FLIP_THRESHOLD) {
var PageFlipDirection = {
UP: -1,
DOWN: 1
};
// In presentation mode scroll one page at a time.
var pageFlipDirection = (this.mouseScrollDelta > 0) ?
PageFlipDirection.UP :
PageFlipDirection.DOWN;
this.clearMouseScrollState();
var currentPage = this.page;
// In case we are already on the first or the last page there is no need
// to do anything.
if ((currentPage == 1 && pageFlipDirection == PageFlipDirection.UP) ||
(currentPage == this.pages.length &&
pageFlipDirection == PageFlipDirection.DOWN))
return;
this.page += pageFlipDirection;
this.mouseScrollTimeStamp = currentTime;
}
},
/**
* This function clears the member attributes used with mouse scrolling in
* presentation mode.
*
* @this {PDFView}
*/
clearMouseScrollState: function pdfViewClearMouseScrollState() {
this.mouseScrollTimeStamp = 0;
this.mouseScrollDelta = 0;
}
};
var PageView = function pageView(container, id, scale,
navigateTo, defaultViewport) {
this.id = id;
this.rotation = 0;
this.scale = scale || 1.0;
this.viewport = defaultViewport;
this.pdfPageRotate = defaultViewport.rotation;
this.renderingState = RenderingStates.INITIAL;
this.resume = null;
this.textLayer = null;
this.zoomLayer = null;
this.annotationLayer = null;
var anchor = document.createElement('a');
anchor.name = '' + this.id;
var div = this.el = 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';
container.appendChild(anchor);
container.appendChild(div);
this.setPdfPage = function pageViewSetPdfPage(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();
};
this.destroy = function pageViewDestroy() {
this.zoomLayer = null;
this.reset();
if (this.pdfPage) {
this.pdfPage.destroy();
}
};
this.reset = function pageViewReset() {
if (this.renderTask) {
this.renderTask.cancel();
}
this.resume = null;
this.renderingState = RenderingStates.INITIAL;
div.style.width = Math.floor(this.viewport.width) + 'px';
div.style.height = Math.floor(this.viewport.height) + 'px';
var childNodes = div.childNodes;
for (var i = div.childNodes.length - 1; i >= 0; i--) {
var node = childNodes[i];
if (this.zoomLayer && this.zoomLayer === node) {
continue;
}
div.removeChild(node);
}
div.removeAttribute('data-loaded');
this.annotationLayer = null;
delete this.canvas;
this.loadingIconDiv = document.createElement('div');
this.loadingIconDiv.className = 'loadingIcon';
div.appendChild(this.loadingIconDiv);
};
this.update = function pageViewUpdate(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
});
if (USE_ONLY_CSS_ZOOM && this.canvas) {
this.cssTransform(this.canvas);
return;
} else if (this.canvas && !this.zoomLayer) {
this.zoomLayer = this.canvas.parentNode;
this.zoomLayer.style.position = 'absolute';
}
if (this.zoomLayer) {
this.cssTransform(this.zoomLayer.firstChild);
}
this.reset();
};
this.cssTransform = function pageCssTransform(canvas) {
// Scale canvas, canvas wrapper, and page container.
var width = this.viewport.width;
var height = this.viewport.height;
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, so 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 textRelativeRotation = this.viewport.rotation -
this.textLayer.viewport.rotation;
var textAbsRotation = Math.abs(textRelativeRotation);
var scale = (width / canvas.width);
if (textAbsRotation === 90 || textAbsRotation === 270) {
scale = width / canvas.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%');
}
};
Object.defineProperty(this, 'width', {
get: function PageView_getWidth() {
return this.viewport.width;
},
enumerable: true
});
Object.defineProperty(this, 'height', {
get: function PageView_getHeight() {
return this.viewport.height;
},
enumerable: true
});
var self = this;
function setupAnnotations(pageDiv, pdfPage, viewport) {
function bindLink(link, dest) {
link.href = PDFView.getDestinationHash(dest);
link.onclick = function pageViewSetupLinksOnclick() {
if (dest) {
PDFView.navigateTo(dest);
}
return false;
};
if (dest) {
link.className = 'internalLink';
}
}
function bindNamedAction(link, action) {
link.href = PDFView.getAnchorUrl('');
link.onclick = function pageViewSetupNamedActionOnClick() {
// See PDF reference, table 8.45 - Named action
switch (action) {
case 'GoToPage':
document.getElementById('pageNumber').focus();
break;
case 'GoBack':
PDFHistory.back();
break;
case 'GoForward':
PDFHistory.forward();
break;
case 'Find':
if (!PDFView.supportsIntegratedFind) {
PDFFindBar.toggle();
}
break;
case 'NextPage':
PDFView.page++;
break;
case 'PrevPage':
PDFView.page--;
break;
case 'LastPage':
PDFView.page = PDFView.pages.length;
break;
case 'FirstPage':
PDFView.page = 1;
break;
default:
break; // No action according to spec
}
return false;
};
link.className = 'internalLink';
}
pdfPage.getAnnotations().then(function(annotationsData) {
if (self.annotationLayer) {
// If an annotationLayer already exists, delete it to avoid creating
// duplicate annotations when rapidly re-zooming the document.
pageDiv.removeChild(self.annotationLayer);
self.annotationLayer = null;
}
viewport = viewport.clone({ dontFlip: true });
for (var i = 0; i < annotationsData.length; i++) {
var data = annotationsData[i];
var annotation = PDFJS.Annotation.fromData(data);
if (!annotation || !annotation.hasHtml()) {
continue;
}
var element = annotation.getHtmlElement(pdfPage.commonObjs);
mozL10n.translate(element);
data = annotation.getData();
var rect = data.rect;
var view = pdfPage.view;
rect = PDFJS.Util.normalizeRect([
rect[0],
view[3] - rect[1] + view[1],
rect[2],
view[3] - rect[3] + view[1]
]);
element.style.left = rect[0] + 'px';
element.style.top = rect[1] + 'px';
element.style.position = 'absolute';
var transform = viewport.transform;
var transformStr = 'matrix(' + transform.join(',') + ')';
CustomStyle.setProp('transform', element, transformStr);
var transformOriginStr = -rect[0] + 'px ' + -rect[1] + 'px';
CustomStyle.setProp('transformOrigin', element, transformOriginStr);
if (data.subtype === 'Link' && !data.url) {
if (data.action) {
bindNamedAction(element, data.action);
} else {
bindLink(element, ('dest' in data) ? data.dest : null);
}
}
if (!self.annotationLayer) {
var annotationLayerDiv = document.createElement('div');
annotationLayerDiv.className = 'annotationLayer';
pageDiv.appendChild(annotationLayerDiv);
self.annotationLayer = annotationLayerDiv;
}
self.annotationLayer.appendChild(element);
}
});
}
this.getPagePoint = function pageViewGetPagePoint(x, y) {
return this.viewport.convertToPdfPoint(x, y);
};
this.scrollIntoView = function pageViewScrollIntoView(dest) {
if (PresentationMode.active) { // Avoid breaking presentation mode.
dest = null;
PDFView.setScale(PDFView.currentScaleValue, true, true);
}
if (!dest) {
scrollIntoView(div);
return;
}
var x = 0, y = 0;
var width = 0, height = 0, widthScale, heightScale;
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 : (this.height / this.scale) / CSS_UNITS;
break;
case 'Fit':
case 'FitB':
scale = 'page-fit';
break;
case 'FitH':
case 'FitBH':
y = dest[2];
scale = 'page-width';
break;
case 'FitV':
case 'FitBV':
x = dest[2];
scale = 'page-height';
break;
case 'FitR':
x = dest[2];
y = dest[3];
width = dest[4] - x;
height = dest[5] - y;
widthScale = (PDFView.container.clientWidth - SCROLLBAR_PADDING) /
width / CSS_UNITS;
heightScale = (PDFView.container.clientHeight - SCROLLBAR_PADDING) /
height / CSS_UNITS;
scale = Math.min(Math.abs(widthScale), Math.abs(heightScale));
break;
default:
return;
}
if (scale && scale !== PDFView.currentScale) {
PDFView.setScale(scale, true, true);
} else if (PDFView.currentScale === UNKNOWN_SCALE) {
PDFView.setScale(DEFAULT_SCALE, true, true);
}
if (scale === 'page-fit' && !dest[4]) {
scrollIntoView(div);
return;
}
var boundingRect = [
this.viewport.convertToViewportPoint(x, y),
this.viewport.convertToViewportPoint(x + width, y + height)
];
setTimeout(function pageViewScrollIntoViewRelayout() {
// letting page to re-layout before scrolling
var scale = PDFView.currentScale;
var x = Math.min(boundingRect[0][0], boundingRect[1][0]);
var y = Math.min(boundingRect[0][1], boundingRect[1][1]);
var width = Math.abs(boundingRect[0][0] - boundingRect[1][0]);
var height = Math.abs(boundingRect[0][1] - boundingRect[1][1]);
scrollIntoView(div, {left: x, top: y, width: width, height: height});
}, 0);
};
this.getTextContent = function pageviewGetTextContent() {
return PDFView.getPage(this.id).then(function(pdfPage) {
return pdfPage.getTextContent();
});
};
this.draw = function pageviewDraw(callback) {
var pdfPage = this.pdfPage;
if (!pdfPage) {
var promise = PDFView.getPage(this.id);
promise.then(function(pdfPage) {
this.setPdfPage(pdfPage);
this.draw(callback);
}.bind(this));
return;
}
if (this.renderingState !== RenderingStates.INITIAL) {
console.error('Must be in new state before drawing');
}
this.renderingState = RenderingStates.RUNNING;
var viewport = this.viewport;
// 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;
canvasWrapper.appendChild(canvas);
div.appendChild(canvasWrapper);
this.canvas = canvas;
var scale = this.scale;
var ctx = canvas.getContext('2d');
var outputScale = getOutputScale(ctx);
if (USE_ONLY_CSS_ZOOM) {
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;
}
canvas.width = (Math.floor(viewport.width) * outputScale.sx) | 0;
canvas.height = (Math.floor(viewport.height) * outputScale.sy) | 0;
canvas.style.width = Math.floor(viewport.width) + 'px';
canvas.style.height = Math.floor(viewport.height) + 'px';
// Add the viewport so it's known what it was originally drawn with.
canvas._viewport = viewport;
var textLayerDiv = null;
if (!PDFJS.disableTextLayer) {
textLayerDiv = document.createElement('div');
textLayerDiv.className = 'textLayer';
textLayerDiv.style.width = canvas.width + 'px';
textLayerDiv.style.height = canvas.height + 'px';
div.appendChild(textLayerDiv);
}
var imageLayerDiv = document.createElement('div');
imageLayerDiv.className = 'imageLayer';
div.appendChild(imageLayerDiv);
var textLayer = this.textLayer =
textLayerDiv ? new TextLayerBuilder({
textLayerDiv: textLayerDiv,
pageIndex: this.id - 1,
lastScrollSource: PDFView,
viewport: this.viewport,
isViewerInPresentationMode: PresentationMode.active
}) : null;
var imageLayer = getVideoOverlay(this.id);
if(imageLayer) {
imageLayer.div = imageLayerDiv;
}
// TODO(mack): use data attributes to store these
ctx._scaleX = outputScale.sx;
ctx._scaleY = outputScale.sy;
if (outputScale.scaled) {
ctx.scale(outputScale.sx, outputScale.sy);
}
if (outputScale.scaled && textLayerDiv) {
var cssScale = 'scale(' + (1 / outputScale.sx) + ', ' +
(1 / outputScale.sy) + ')';
CustomStyle.setProp('transform' , textLayerDiv, cssScale);
CustomStyle.setProp('transformOrigin' , textLayerDiv, '0% 0%');
textLayerDiv.dataset._scaleX = outputScale.sx;
textLayerDiv.dataset._scaleY = outputScale.sy;
}
if (imageLayerDiv) {
CustomStyle.setProp('transform' , imageLayerDiv, cssScale);
CustomStyle.setProp('transformOrigin' , imageLayerDiv, '0% 0%');
}
// 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') {
return;
}
self.renderingState = RenderingStates.FINISHED;
if (self.loadingIconDiv) {
div.removeChild(self.loadingIconDiv);
delete self.loadingIconDiv;
}
if (self.zoomLayer) {
div.removeChild(self.zoomLayer);
self.zoomLayer = null;
}
if (error) {
PDFView.error(mozL10n.get('rendering_error', null,
'An error occurred while rendering the page.'), error);
}
self.stats = pdfPage.stats;
self.updateStats();
if (self.onAfterDraw) {
self.onAfterDraw();
}
cache.push(self);
var event = document.createEvent('CustomEvent');
event.initCustomEvent('pagerender', true, true, {
pageNumber: pdfPage.pageNumber
});
div.dispatchEvent(event);
callback();
}
var renderContext = {
canvasContext: ctx,
viewport: this.viewport,
textLayer: textLayer,
imageLayer: imageLayer,
continueCallback: function pdfViewcContinueCallback(cont) {
if (PDFView.highestPriorityPage !== 'page' + self.id) {
self.renderingState = RenderingStates.PAUSED;
self.resume = function resumeCallback() {
self.renderingState = RenderingStates.RUNNING;
cont();
};
return;
}
cont();
}
};
var renderTask = this.renderTask = this.pdfPage.render(renderContext);
this.renderTask.promise.then(
function pdfPageRenderCallback() {
pageViewDrawCallback(null);
},
function pdfPageRenderError(error) {
pageViewDrawCallback(error);
}
);
if (textLayer) {
this.getTextContent().then(
function textContentResolved(textContent) {
textLayer.setTextContent(textContent);
}
);
}
setupAnnotations(div, pdfPage, this.viewport);
div.setAttribute('data-loaded', true);
};
this.beforePrint = function pageViewBeforePrint() {
var pdfPage = this.pdfPage;
var viewport = pdfPage.getViewport(1);
// Use the same hack we use for high dpi displays for printing to get better
// output until bug 811002 is fixed in FF.
var PRINT_OUTPUT_SCALE = 2;
var canvas = document.createElement('canvas');
canvas.width = Math.floor(viewport.width) * PRINT_OUTPUT_SCALE;
canvas.height = Math.floor(viewport.height) * PRINT_OUTPUT_SCALE;
canvas.style.width = (PRINT_OUTPUT_SCALE * viewport.width) + 'pt';
canvas.style.height = (PRINT_OUTPUT_SCALE * viewport.height) + 'pt';
var cssScale = 'scale(' + (1 / PRINT_OUTPUT_SCALE) + ', ' +
(1 / PRINT_OUTPUT_SCALE) + ')';
CustomStyle.setProp('transform' , canvas, cssScale);
CustomStyle.setProp('transformOrigin' , canvas, '0% 0%');
var printContainer = document.getElementById('printContainer');
var canvasWrapper = document.createElement('div');
canvasWrapper.style.width = viewport.width + 'pt';
canvasWrapper.style.height = viewport.height + 'pt';
canvasWrapper.appendChild(canvas);
printContainer.appendChild(canvasWrapper);
var self = this;
canvas.mozPrintCallback = function(obj) {
var ctx = obj.context;
ctx.save();
ctx.fillStyle = 'rgb(255, 255, 255)';
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.restore();
ctx.scale(PRINT_OUTPUT_SCALE, PRINT_OUTPUT_SCALE);
var renderContext = {
canvasContext: ctx,
viewport: viewport
};
pdfPage.render(renderContext).promise.then(function() {
// Tell the printEngine that rendering this canvas/page has finished.
obj.done();
self.pdfPage.destroy();
}, function(error) {
console.error(error);
// Tell the printEngine that rendering this canvas/page has failed.
// This will make the print proces stop.
if ('abort' in obj) {
obj.abort();
} else {
obj.done();
}
self.pdfPage.destroy();
});
};
};
this.updateStats = function pageViewUpdateStats() {
if (!this.stats) {
return;
}
if (PDFJS.pdfBug && Stats.enabled) {
var stats = this.stats;
Stats.add(this.id, stats);
}
};
};
var ThumbnailView = function thumbnailView(container, id, defaultViewport) {
var anchor = document.createElement('a');
anchor.href = PDFView.getAnchorUrl('#page=' + id);
anchor.title = mozL10n.get('thumb_page_title', {page: id}, 'Page {{page}}');
anchor.onclick = function stopNavigation() {
PDFView.page = id;
return false;
};
this.pdfPage = undefined;
this.viewport = defaultViewport;
this.pdfPageRotate = defaultViewport.rotation;
this.rotation = 0;
this.pageWidth = this.viewport.width;
this.pageHeight = this.viewport.height;
this.pageRatio = this.pageWidth / this.pageHeight;
this.id = id;
this.canvasWidth = 98;
this.canvasHeight = this.canvasWidth / this.pageWidth * this.pageHeight;
this.scale = (this.canvasWidth / this.pageWidth);
var div = this.el = document.createElement('div');
div.id = 'thumbnailContainer' + id;
div.className = 'thumbnail';
if (id === 1) {
// Highlight the thumbnail of the first page when no page number is
// specified (or exists in cache) when the document is loaded.
div.classList.add('selected');
}
var ring = document.createElement('div');
ring.className = 'thumbnailSelectionRing';
ring.style.width = this.canvasWidth + 'px';
ring.style.height = this.canvasHeight + 'px';
div.appendChild(ring);
anchor.appendChild(div);
container.appendChild(anchor);
this.hasImage = false;
this.renderingState = RenderingStates.INITIAL;
this.setPdfPage = function thumbnailViewSetPdfPage(pdfPage) {
this.pdfPage = pdfPage;
this.pdfPageRotate = pdfPage.rotate;
var totalRotation = (this.rotation + this.pdfPageRotate) % 360;
this.viewport = pdfPage.getViewport(1, totalRotation);
this.update();
};
this.update = function thumbnailViewUpdate(rotation) {
if (rotation !== undefined) {
this.rotation = rotation;
}
var totalRotation = (this.rotation + this.pdfPageRotate) % 360;
this.viewport = this.viewport.clone({
scale: 1,
rotation: totalRotation
});
this.pageWidth = this.viewport.width;
this.pageHeight = this.viewport.height;
this.pageRatio = this.pageWidth / this.pageHeight;
this.canvasHeight = this.canvasWidth / this.pageWidth * this.pageHeight;
this.scale = (this.canvasWidth / this.pageWidth);
div.removeAttribute('data-loaded');
ring.textContent = '';
ring.style.width = this.canvasWidth + 'px';
ring.style.height = this.canvasHeight + 'px';
this.hasImage = false;
this.renderingState = RenderingStates.INITIAL;
this.resume = null;
};
this.getPageDrawContext = function thumbnailViewGetPageDrawContext() {
var canvas = document.createElement('canvas');
canvas.id = 'thumbnail' + id;
canvas.width = this.canvasWidth;
canvas.height = this.canvasHeight;
canvas.className = 'thumbnailImage';
canvas.setAttribute('aria-label', mozL10n.get('thumb_page_canvas',
{page: id}, 'Thumbnail of Page {{page}}'));
div.setAttribute('data-loaded', true);
ring.appendChild(canvas);
var ctx = canvas.getContext('2d');
ctx.save();
ctx.fillStyle = 'rgb(255, 255, 255)';
ctx.fillRect(0, 0, this.canvasWidth, this.canvasHeight);
ctx.restore();
return ctx;
};
this.drawingRequired = function thumbnailViewDrawingRequired() {
return !this.hasImage;
};
this.draw = function thumbnailViewDraw(callback) {
if (!this.pdfPage) {
var promise = PDFView.getPage(this.id);
promise.then(function(pdfPage) {
this.setPdfPage(pdfPage);
this.draw(callback);
}.bind(this));
return;
}
if (this.renderingState !== RenderingStates.INITIAL) {
console.error('Must be in new state before drawing');
}
this.renderingState = RenderingStates.RUNNING;
if (this.hasImage) {
callback();
return;
}
var self = this;
var ctx = this.getPageDrawContext();
var drawViewport = this.viewport.clone({ scale: this.scale });
var renderContext = {
canvasContext: ctx,
viewport: drawViewport,
continueCallback: function(cont) {
if (PDFView.highestPriorityPage !== 'thumbnail' + self.id) {
self.renderingState = RenderingStates.PAUSED;
self.resume = function() {
self.renderingState = RenderingStates.RUNNING;
cont();
};
return;
}
cont();
}
};
this.pdfPage.render(renderContext).promise.then(
function pdfPageRenderCallback() {
self.renderingState = RenderingStates.FINISHED;
callback();
},
function pdfPageRenderError(error) {
self.renderingState = RenderingStates.FINISHED;
callback();
}
);
this.hasImage = true;
};
this.setImage = function thumbnailViewSetImage(img) {
if (!this.pdfPage) {
var promise = PDFView.getPage(this.id);
promise.then(function(pdfPage) {
this.setPdfPage(pdfPage);
this.setImage(img);
}.bind(this));
return;
}
if (this.hasImage || !img) {
return;
}
this.renderingState = RenderingStates.FINISHED;
var ctx = this.getPageDrawContext();
ctx.drawImage(img, 0, 0, img.width, img.height,
0, 0, ctx.canvas.width, ctx.canvas.height);
this.hasImage = true;
};
};
var FIND_SCROLL_OFFSET_TOP = -50;
var FIND_SCROLL_OFFSET_LEFT = -400;
/**
* TextLayerBuilder provides text-selection
* functionality for the PDF. It does this
* by creating overlay divs over the PDF
* text. This divs contain text that matches
* the PDF text they are overlaying. This
* object also provides for a way to highlight
* text that is being searched for.
*/
var TextLayerBuilder = function textLayerBuilder(options) {
var textLayerFrag = document.createDocumentFragment();
this.textLayerDiv = options.textLayerDiv;
this.layoutDone = false;
this.divContentDone = false;
this.pageIdx = options.pageIndex;
this.matches = [];
this.lastScrollSource = options.lastScrollSource;
this.viewport = options.viewport;
this.isViewerInPresentationMode = options.isViewerInPresentationMode;
if(typeof PDFFindController === 'undefined') {
window.PDFFindController = null;
}
if(typeof this.lastScrollSource === 'undefined') {
this.lastScrollSource = null;
}
this.beginLayout = function textLayerBuilderBeginLayout() {
this.textDivs = [];
this.renderingDone = false;
};
this.endLayout = function textLayerBuilderEndLayout() {
this.layoutDone = true;
this.insertDivContent();
};
this.renderLayer = function textLayerBuilderRenderLayer() {
var self = this;
var textDivs = this.textDivs;
var bidiTexts = this.textContent.bidiTexts;
var textLayerDiv = this.textLayerDiv;
var canvas = document.createElement('canvas');
var ctx = canvas.getContext('2d');
// No point in rendering so many divs as it'd make the browser unusable
// even after the divs are rendered
var MAX_TEXT_DIVS_TO_RENDER = 100000;
if (textDivs.length > MAX_TEXT_DIVS_TO_RENDER)
return;
for (var i = 0, ii = textDivs.length; i < ii; i++) {
var textDiv = textDivs[i];
if ('isWhitespace' in textDiv.dataset) {
continue;
}
ctx.font = textDiv.style.fontSize + ' ' + textDiv.style.fontFamily;
var width = ctx.measureText(textDiv.textContent).width;
if (width > 0) {
textLayerFrag.appendChild(textDiv);
var textScale = textDiv.dataset.canvasWidth / width;
var rotation = textDiv.dataset.angle;
var transform = 'scale(' + textScale + ', 1)';
transform = 'rotate(' + rotation + 'deg) ' + transform;
CustomStyle.setProp('transform' , textDiv, transform);
CustomStyle.setProp('transformOrigin' , textDiv, '0% 0%');
}
}
textLayerDiv.appendChild(textLayerFrag);
this.renderingDone = true;
this.updateMatches();
};
this.setupRenderLayoutTimer = function textLayerSetupRenderLayoutTimer() {
// Schedule renderLayout() if user has been scrolling, otherwise
// run it right away
var RENDER_DELAY = 200; // in ms
var self = this;
var lastScroll = this.lastScrollSource === null ?
0 : this.lastScrollSource.lastScroll;
if (Date.now() - lastScroll > RENDER_DELAY) {
// Render right away
this.renderLayer();
} else {
// Schedule
if (this.renderTimer)
clearTimeout(this.renderTimer);
this.renderTimer = setTimeout(function() {
self.setupRenderLayoutTimer();
}, RENDER_DELAY);
}
};
this.appendText = function textLayerBuilderAppendText(geom) {
var textDiv = document.createElement('div');
// vScale and hScale already contain the scaling to pixel units
var fontHeight = geom.fontSize * Math.abs(geom.vScale);
textDiv.dataset.canvasWidth = geom.canvasWidth * Math.abs(geom.hScale);
textDiv.dataset.fontName = geom.fontName;
textDiv.dataset.angle = geom.angle * (180 / Math.PI);
textDiv.style.fontSize = fontHeight + 'px';
textDiv.style.fontFamily = geom.fontFamily;
textDiv.style.left = (geom.x + (fontHeight * Math.sin(geom.angle))) + 'px';
textDiv.style.top = (geom.y - (fontHeight * Math.cos(geom.angle))) + 'px';
// The content of the div is set in the `setTextContent` function.
this.textDivs.push(textDiv);
};
this.insertDivContent = function textLayerUpdateTextContent() {
// Only set the content of the divs once layout has finished, the content
// for the divs is available and content is not yet set on the divs.
if (!this.layoutDone || this.divContentDone || !this.textContent)
return;
this.divContentDone = true;
var textDivs = this.textDivs;
var bidiTexts = this.textContent.bidiTexts;
for (var i = 0; i < bidiTexts.length; i++) {
var bidiText = bidiTexts[i];
var textDiv = textDivs[i];
if (!/\S/.test(bidiText.str)) {
textDiv.dataset.isWhitespace = true;
continue;
}
textDiv.textContent = bidiText.str;
// TODO refactor text layer to use text content position
/**
* var arr = this.viewport.convertToViewportPoint(bidiText.x, bidiText.y);
* textDiv.style.left = arr[0] + 'px';
* textDiv.style.top = arr[1] + 'px';
*/
// bidiText.dir may be 'ttb' for vertical texts.
textDiv.dir = bidiText.dir;
}
this.setupRenderLayoutTimer();
};
this.setTextContent = function textLayerBuilderSetTextContent(textContent) {
this.textContent = textContent;
this.insertDivContent();
};
this.convertMatches = function textLayerBuilderConvertMatches(matches) {
var i = 0;
var iIndex = 0;
var bidiTexts = this.textContent.bidiTexts;
var end = bidiTexts.length - 1;
var queryLen = PDFFindController === null ?
0 : PDFFindController.state.query.length;
var lastDivIdx = -1;
var pos;
var ret = [];
// Loop over all the matches.
for (var m = 0; m < matches.length; m++) {
var matchIdx = matches[m];
// # Calculate the begin position.
// Loop over the divIdxs.
while (i !== end && matchIdx >= (iIndex + bidiTexts[i].str.length)) {
iIndex += bidiTexts[i].str.length;
i++;
}
// TODO: Do proper handling here if something goes wrong.
if (i == bidiTexts.length) {
console.error('Could not find matching mapping');
}
var match = {
begin: {
divIdx: i,
offset: matchIdx - iIndex
}
};
// # Calculate the end position.
matchIdx += queryLen;
// Somewhat same array as above, but use a > 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;
};
this.renderMatches = function textLayerBuilder_renderMatches(matches) {
// Early exit if there is nothing to render.
if (matches.length === 0) {
return;
}
var bidiTexts = this.textContent.bidiTexts;
var textDivs = this.textDivs;
var prevEnd = null;
var isSelectedPage = PDFFindController === null ?
false : (this.pageIdx === PDFFindController.selected.pageIdx);
var selectedMatchIdx = PDFFindController === null ?
-1 : PDFFindController.selected.matchIdx;
var highlightAll = PDFFindController === null ?
false : PDFFindController.state.highlightAll;
var infty = {
divIdx: -1,
offset: undefined
};
function beginText(begin, className) {
var divIdx = begin.divIdx;
var div = textDivs[divIdx];
div.textContent = '';
var content = bidiTexts[divIdx].str.substring(0, begin.offset);
var node = document.createTextNode(content);
if (className) {
var isSelected = isSelectedPage &&
divIdx === selectedMatchIdx;
var span = document.createElement('span');
span.className = className + (isSelected ? ' selected' : '');
span.appendChild(node);
div.appendChild(span);
return;
}
div.appendChild(node);
}
function appendText(from, to, className) {
var divIdx = from.divIdx;
var div = textDivs[divIdx];
var content = bidiTexts[divIdx].str.substring(from.offset, to.offset);
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);
}
function highlightDiv(divIdx, className) {
textDivs[divIdx].className = className;
}
var i0 = selectedMatchIdx, i1 = i0 + 1, i;
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 (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 (isSelected && !this.isViewerInPresentationMode) {
scrollIntoView(textDivs[begin.divIdx], { top: FIND_SCROLL_OFFSET_TOP,
left: FIND_SCROLL_OFFSET_LEFT });
}
// 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) {
appendText(prevEnd, infty);
}
// clears the divs and set the content until the begin point.
beginText(begin);
} else {
appendText(prevEnd, begin);
}
if (begin.divIdx === end.divIdx) {
appendText(begin, end, 'highlight' + highlightSuffix);
} else {
appendText(begin, infty, 'highlight begin' + highlightSuffix);
for (var n = begin.divIdx + 1; n < end.divIdx; n++) {
highlightDiv(n, 'highlight middle' + highlightSuffix);
}
beginText(end, 'highlight end' + highlightSuffix);
}
prevEnd = end;
}
if (prevEnd) {
appendText(prevEnd, infty);
}
};
this.updateMatches = function textLayerUpdateMatches() {
// Only show matches, once all rendering is done.
if (!this.renderingDone)
return;
// Clear out all matches.
var matches = this.matches;
var textDivs = this.textDivs;
var bidiTexts = this.textContent.bidiTexts;
var clearedUntilDivIdx = -1;
// Clear out all current matches.
for (var i = 0; i < matches.length; i++) {
var match = matches[i];
var begin = Math.max(clearedUntilDivIdx, match.begin.divIdx);
for (var n = begin; n <= match.end.divIdx; n++) {
var div = textDivs[n];
div.textContent = bidiTexts[n].str;
div.className = '';
}
clearedUntilDivIdx = match.end.divIdx + 1;
}
if (PDFFindController === null || !PDFFindController.active)
return;
// Convert the matches on the page controller into the match format used
// for the textLayer.
this.matches = matches =
this.convertMatches(PDFFindController === null ?
[] : (PDFFindController.pageMatches[this.pageIdx] || []));
this.renderMatches(this.matches);
};
};
var DocumentOutlineView = function documentOutlineView(outline) {
var outlineView = document.getElementById('outlineView');
var outlineButton = document.getElementById('viewOutline');
while (outlineView.firstChild)
outlineView.removeChild(outlineView.firstChild);
if (!outline) {
if (!outlineView.classList.contains('hidden'))
PDFView.switchSidebarView('thumbs');
return;
}
function bindItemLink(domObj, item) {
domObj.href = PDFView.getDestinationHash(item.dest);
domObj.onclick = function documentOutlineViewOnclick(e) {
PDFView.navigateTo(item.dest);
return false;
};
}
var queue = [{parent: outlineView, items: outline}];
while (queue.length > 0) {
var levelData = queue.shift();
var i, n = levelData.items.length;
for (i = 0; i < n; i++) {
var item = levelData.items[i];
var div = document.createElement('div');
div.className = 'outlineItem';
var a = document.createElement('a');
bindItemLink(a, item);
a.textContent = item.title;
div.appendChild(a);
if (item.items.length > 0) {
var itemsDiv = document.createElement('div');
itemsDiv.className = 'outlineItems';
div.appendChild(itemsDiv);
queue.push({parent: itemsDiv, items: item.items});
}
levelData.parent.appendChild(div);
}
}
};
document.addEventListener('DOMContentLoaded', function webViewerLoad(evt) {
PDFView.initialize();
var params = PDFView.parseQueryString(document.location.search.substring(1));
var file = params.file || document.location.pathname.replace(/\/reader\//, '/pdf/');
var fileInput = document.createElement('input');
fileInput.id = 'fileInput';
fileInput.className = 'fileInput';
fileInput.setAttribute('type', 'file');
fileInput.setAttribute('style',
'visibility: hidden; position: fixed; right: 0; top: 0');
fileInput.oncontextmenu = noContextMenuHandler;
document.body.appendChild(fileInput);
if (!window.File || !window.FileReader || !window.FileList || !window.Blob) {
document.getElementById('openFile').setAttribute('hidden', 'true');
document.getElementById('secondaryOpenFile').setAttribute('hidden', 'true');
} else {
document.getElementById('fileInput').value = null;
}
//hide unused elements
document.getElementById('openFile').setAttribute('hidden', 'true');
document.getElementById('viewBookmark').setAttribute('hidden', 'true');
document.getElementById('print').setAttribute('hidden', 'true');
// Special debugging flags in the hash section of the URL.
var hash = document.location.hash.substring(1);
var hashParams = PDFView.parseQueryString(hash);
if ('disableWorker' in hashParams) {
PDFJS.disableWorker = (hashParams['disableWorker'] === 'true');
}
if ('disableRange' in hashParams) {
PDFJS.disableRange = (hashParams['disableRange'] === 'true');
}
if ('disableAutoFetch' in hashParams) {
PDFJS.disableAutoFetch = (hashParams['disableAutoFetch'] === 'true');
}
if ('disableFontFace' in hashParams) {
PDFJS.disableFontFace = (hashParams['disableFontFace'] === 'true');
}
if ('disableHistory' in hashParams) {
PDFJS.disableHistory = (hashParams['disableHistory'] === 'true');
}
if ('useOnlyCssZoom' in hashParams) {
USE_ONLY_CSS_ZOOM = (hashParams['useOnlyCssZoom'] === 'true');
}
if ('verbosity' in hashParams) {
PDFJS.verbosity = hashParams['verbosity'] | 0;
}
var locale = navigator.language;
if ('locale' in hashParams)
locale = hashParams['locale'];
mozL10n.setLanguage(locale);
if ('textLayer' in hashParams) {
switch (hashParams['textLayer']) {
case 'off':
PDFJS.disableTextLayer = true;
break;
case 'visible':
case 'shadow':
case 'hover':
var viewer = document.getElementById('viewer');
viewer.classList.add('textLayer-' + hashParams['textLayer']);
break;
}
}
if ('pdfBug' in hashParams) {
PDFJS.pdfBug = true;
var pdfBug = hashParams['pdfBug'];
var enabled = pdfBug.split(',');
PDFBug.enable(enabled);
PDFBug.init();
}
if (!PDFView.supportsPrinting) {
document.getElementById('print').classList.add('hidden');
document.getElementById('secondaryPrint').classList.add('hidden');
}
if (!PDFView.supportsFullscreen) {
document.getElementById('presentationMode').classList.add('hidden');
document.getElementById('secondaryPresentationMode').
classList.add('hidden');
}
if (PDFView.supportsIntegratedFind) {
document.getElementById('viewFind').classList.add('hidden');
}
// Listen for unsuporrted features to trigger the fallback UI.
PDFJS.UnsupportedManager.listen(PDFView.fallback.bind(PDFView));
// Suppress context menus for some controls
document.getElementById('scaleSelect').oncontextmenu = noContextMenuHandler;
var mainContainer = document.getElementById('mainContainer');
var outerContainer = document.getElementById('outerContainer');
mainContainer.addEventListener('transitionend', function(e) {
if (e.target == mainContainer) {
var event = document.createEvent('UIEvents');
event.initUIEvent('resize', false, false, window, 0);
window.dispatchEvent(event);
outerContainer.classList.remove('sidebarMoving');
}
}, true);
document.getElementById('sidebarToggle').addEventListener('click',
function() {
this.classList.toggle('toggled');
outerContainer.classList.add('sidebarMoving');
outerContainer.classList.toggle('sidebarOpen');
PDFView.sidebarOpen = outerContainer.classList.contains('sidebarOpen');
PDFView.renderHighestPriority();
});
document.getElementById('viewThumbnail').addEventListener('click',
function() {
PDFView.switchSidebarView('thumbs');
});
document.getElementById('viewOutline').addEventListener('click',
function() {
PDFView.switchSidebarView('outline');
});
document.getElementById('previous').addEventListener('click',
function() {
PDFView.page--;
});
document.getElementById('next').addEventListener('click',
function() {
PDFView.page++;
});
document.getElementById('zoomIn').addEventListener('click',
function() {
PDFView.zoomIn();
});
document.getElementById('zoomOut').addEventListener('click',
function() {
PDFView.zoomOut();
});
document.getElementById('pageNumber').addEventListener('click',
function() {
this.select();
});
document.getElementById('pageNumber').addEventListener('change',
function() {
// Handle the user inputting a floating point number.
PDFView.page = (this.value | 0);
if (this.value !== (this.value | 0).toString()) {
this.value = PDFView.page;
}
});
document.getElementById('scaleSelect').addEventListener('change',
function() {
PDFView.setScale(this.value);
});
document.getElementById('presentationMode').addEventListener('click',
SecondaryToolbar.presentationModeClick.bind(SecondaryToolbar));
document.getElementById('openFile').addEventListener('click',
SecondaryToolbar.openFileClick.bind(SecondaryToolbar));
document.getElementById('print').addEventListener('click',
SecondaryToolbar.printClick.bind(SecondaryToolbar));
document.getElementById('download').addEventListener('click',
SecondaryToolbar.downloadClick.bind(SecondaryToolbar));
PDFView.open(file, 0);
}, true);
function updateViewarea() {
if (!PDFView.initialized)
return;
var visible = PDFView.getVisiblePages();
var visiblePages = visible.views;
if (visiblePages.length === 0) {
return;
}
PDFView.renderHighestPriority();
var currentId = PDFView.page;
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 === PDFView.page) {
stillFullyVisible = true;
break;
}
}
if (!stillFullyVisible) {
currentId = visiblePages[0].id;
}
updateViewarea.inProgress = true; // used in "set page"
PDFView.page = currentId;
updateViewarea.inProgress = false;
var currentScale = PDFView.currentScale;
var currentScaleValue = PDFView.currentScaleValue;
var normalizedScaleValue = parseFloat(currentScaleValue) === currentScale ?
Math.round(currentScale * 10000) / 100 : currentScaleValue;
var pageNumber = firstPage.id;
var pdfOpenParams = '#page=' + pageNumber;
pdfOpenParams += '&zoom=' + normalizedScaleValue;
var currentPage = PDFView.pages[pageNumber - 1];
var topLeft = currentPage.getPagePoint(PDFView.container.scrollLeft,
(PDFView.container.scrollTop - firstPage.y));
pdfOpenParams += ',' + Math.round(topLeft[0]) + ',' + Math.round(topLeft[1]);
var store = PDFView.store;
store.initializedPromise.then(function() {
store.set('exists', true);
store.set('page', pageNumber);
store.set('zoom', normalizedScaleValue);
store.set('scrollLeft', Math.round(topLeft[0]));
store.set('scrollTop', Math.round(topLeft[1]));
});
var href = PDFView.getAnchorUrl(pdfOpenParams);
document.getElementById('viewBookmark').href = href;
document.getElementById('secondaryViewBookmark').href = href;
// Update the current bookmark in the browsing history.
PDFHistory.updateCurrentBookmark(pdfOpenParams, pageNumber);
}
window.addEventListener('resize', function webViewerResize(evt) {
if (PDFView.initialized &&
(document.getElementById('pageWidthOption').selected ||
document.getElementById('pageFitOption').selected ||
document.getElementById('pageAutoOption').selected)) {
PDFView.setScale(document.getElementById('scaleSelect').value);
}
updateViewarea();
// Set the 'max-height' CSS property of the secondary toolbar.
SecondaryToolbar.setMaxHeight(PDFView.container);
});
window.addEventListener('hashchange', function webViewerHashchange(evt) {
if (PDFHistory.isHashChangeUnlocked) {
PDFView.setHash(document.location.hash.substring(1));
}
});
window.addEventListener('change', function webViewerChange(evt) {
var files = evt.target.files;
if (!files || files.length === 0)
return;
// Read the local file into a Uint8Array.
var fileReader = new FileReader();
fileReader.onload = function webViewerChangeFileReaderOnload(evt) {
var buffer = evt.target.result;
var uint8Array = new Uint8Array(buffer);
PDFView.open(uint8Array, 0);
};
var file = files[0];
fileReader.readAsArrayBuffer(file);
PDFView.setTitleUsingUrl(file.name);
// URL does not reflect proper document location - hiding some icons.
document.getElementById('viewBookmark').setAttribute('hidden', 'true');
document.getElementById('secondaryViewBookmark').
setAttribute('hidden', 'true');
document.getElementById('download').setAttribute('hidden', 'true');
document.getElementById('secondaryDownload').setAttribute('hidden', 'true');
}, true);
function selectScaleOption(value) {
var options = document.getElementById('scaleSelect').options;
var predefinedValueFound = false;
for (var i = 0; i < options.length; i++) {
var option = options[i];
if (option.value != value) {
option.selected = false;
continue;
}
option.selected = true;
predefinedValueFound = true;
}
return predefinedValueFound;
}
window.addEventListener('localized', function localized(evt) {
document.getElementsByTagName('html')[0].dir = mozL10n.getDirection();
PDFView.animationStartedPromise.then(function() {
// Adjust the width of the zoom box to fit the content.
// Note: This is only done if the zoom box is actually visible,
// since otherwise element.clientWidth will return 0.
var container = document.getElementById('scaleSelectContainer');
if (container.clientWidth > 0) {
var select = document.getElementById('scaleSelect');
select.setAttribute('style', 'min-width: inherit;');
var width = select.clientWidth + SCALE_SELECT_CONTAINER_PADDING;
select.setAttribute('style', 'min-width: ' +
(width + SCALE_SELECT_PADDING) + 'px;');
container.setAttribute('style', 'min-width: ' + width + 'px; ' +
'max-width: ' + width + 'px;');
}
// Set the 'max-height' CSS property of the secondary toolbar.
SecondaryToolbar.setMaxHeight(PDFView.container);
});
}, true);
window.addEventListener('scalechange', function scalechange(evt) {
document.getElementById('zoomOut').disabled = (evt.scale === MIN_SCALE);
document.getElementById('zoomIn').disabled = (evt.scale === MAX_SCALE);
var customScaleOption = document.getElementById('customScaleOption');
customScaleOption.selected = false;
if (!evt.resetAutoSettings &&
(document.getElementById('pageWidthOption').selected ||
document.getElementById('pageFitOption').selected ||
document.getElementById('pageAutoOption').selected)) {
updateViewarea();
return;
}
var predefinedValueFound = selectScaleOption('' + evt.scale);
if (!predefinedValueFound) {
customScaleOption.textContent = Math.round(evt.scale * 10000) / 100 + '%';
customScaleOption.selected = true;
}
updateViewarea();
}, true);
window.addEventListener('pagechange', function pagechange(evt) {
var page = evt.pageNumber;
if (PDFView.previousPageNumber !== page) {
document.getElementById('pageNumber').value = page;
var selected = document.querySelector('.thumbnail.selected');
if (selected) {
selected.classList.remove('selected');
}
var thumbnail = document.getElementById('thumbnailContainer' + page);
thumbnail.classList.add('selected');
var visibleThumbs = PDFView.getVisibleThumbs();
var numVisibleThumbs = visibleThumbs.views.length;
// If the thumbnail isn't currently visible, scroll it into view.
if (numVisibleThumbs > 0) {
var first = visibleThumbs.first.id;
// Account for only one thumbnail being visible.
var last = (numVisibleThumbs > 1 ? visibleThumbs.last.id : first);
if (page <= first || page >= last) {
scrollIntoView(thumbnail, { top: THUMBNAIL_SCROLL_MARGIN });
}
}
}
document.getElementById('previous').disabled = (page <= 1);
document.getElementById('next').disabled = (page >= PDFView.pages.length);
}, true);
// Firefox specific event, so that we can prevent browser from zooming
window.addEventListener('DOMMouseScroll', function(evt) {
if (evt.ctrlKey) {
evt.preventDefault();
var ticks = evt.detail;
var direction = (ticks > 0) ? 'zoomOut' : 'zoomIn';
PDFView[direction](Math.abs(ticks));
} else if (PresentationMode.active) {
var FIREFOX_DELTA_FACTOR = -40;
PDFView.mouseScroll(evt.detail * FIREFOX_DELTA_FACTOR);
}
}, false);
window.addEventListener('click', function click(evt) {
if (!PresentationMode.active) {
if (SecondaryToolbar.opened && PDFView.container.contains(evt.target)) {
SecondaryToolbar.close();
}
} else if (evt.button === 0) {
// Necessary since preventDefault() in 'mousedown' won't stop
// the event propagation in all circumstances in presentation mode.
evt.preventDefault();
}
}, false);
window.addEventListener('keydown', function keydown(evt) {
if (PasswordPrompt.visible) {
return;
}
var handled = false;
var cmd = (evt.ctrlKey ? 1 : 0) |
(evt.altKey ? 2 : 0) |
(evt.shiftKey ? 4 : 0) |
(evt.metaKey ? 8 : 0);
// First, handle the key bindings that are independent whether an input
// control is selected or not.
if (cmd === 1 || cmd === 8 || cmd === 5 || cmd === 12) {
// either CTRL or META key with optional SHIFT.
switch (evt.keyCode) {
case 70: // f
if (!PDFView.supportsIntegratedFind) {
PDFFindBar.open();
handled = true;
}
break;
case 71: // g
if (!PDFView.supportsIntegratedFind) {
PDFFindBar.dispatchEvent('again', cmd === 5 || cmd === 12);
handled = true;
}
break;
case 61: // FF/Mac '='
case 107: // FF '+' and '='
case 187: // Chrome '+'
case 171: // FF with German keyboard
PDFView.zoomIn();
handled = true;
break;
case 173: // FF/Mac '-'
case 109: // FF '-'
case 189: // Chrome '-'
PDFView.zoomOut();
handled = true;
break;
case 48: // '0'
case 96: // '0' on Numpad of Swedish keyboard
// keeping it unhandled (to restore page zoom to 100%)
setTimeout(function () {
// ... and resetting the scale after browser adjusts its scale
PDFView.setScale(DEFAULT_SCALE, true);
});
handled = false;
break;
}
}
// CTRL+ALT or Option+Command
if (cmd === 3 || cmd === 10) {
switch (evt.keyCode) {
case 80: // p
SecondaryToolbar.presentationModeClick();
handled = true;
break;
case 71: // g
// focuses input#pageNumber field
document.getElementById('pageNumber').select();
handled = true;
break;
}
}
if (handled) {
evt.preventDefault();
return;
}
// Some shortcuts should not get handled if a control/input element
// is selected.
var curElement = document.activeElement || document.querySelector(':focus');
if (curElement && (curElement.tagName.toUpperCase() === 'INPUT' ||
curElement.tagName.toUpperCase() === 'TEXTAREA' ||
curElement.tagName.toUpperCase() === 'SELECT')) {
// Make sure that the secondary toolbar is closed when Escape is pressed.
if (evt.keyCode !== 27) { // 'Esc'
return;
}
}
var controlsElement = document.getElementById('toolbar');
while (curElement) {
if (curElement === controlsElement && !PresentationMode.active)
return; // ignoring if the 'toolbar' element is focused
curElement = curElement.parentNode;
}
if (cmd === 0) { // no control key pressed at all.
switch (evt.keyCode) {
case 38: // up arrow
case 33: // pg up
case 8: // backspace
if (!PresentationMode.active &&
PDFView.currentScaleValue !== 'page-fit') {
break;
}
/* in presentation mode */
/* falls through */
case 37: // left arrow
// horizontal scrolling using arrow keys
if (PDFView.isHorizontalScrollbarEnabled) {
break;
}
/* falls through */
case 75: // 'k'
case 80: // 'p'
PDFView.page--;
handled = true;
break;
case 27: // esc key
if (SecondaryToolbar.opened) {
SecondaryToolbar.close();
handled = true;
}
if (!PDFView.supportsIntegratedFind && PDFFindBar.opened) {
PDFFindBar.close();
handled = true;
}
break;
case 40: // down arrow
case 34: // pg down
case 32: // spacebar
if (!PresentationMode.active &&
PDFView.currentScaleValue !== 'page-fit') {
break;
}
/* falls through */
case 39: // right arrow
// horizontal scrolling using arrow keys
if (PDFView.isHorizontalScrollbarEnabled) {
break;
}
/* falls through */
case 74: // 'j'
case 78: // 'n'
PDFView.page++;
handled = true;
break;
case 36: // home
if (PresentationMode.active) {
PDFView.page = 1;
handled = true;
}
break;
case 35: // end
if (PresentationMode.active) {
PDFView.page = PDFView.pdfDocument.numPages;
handled = true;
}
break;
case 72: // 'h'
if (!PresentationMode.active) {
HandTool.toggle();
}
break;
case 82: // 'r'
PDFView.rotatePages(90);
break;
}
}
if (cmd === 4) { // shift-key
switch (evt.keyCode) {
case 32: // spacebar
if (!PresentationMode.active &&
PDFView.currentScaleValue !== 'page-fit') {
break;
}
PDFView.page--;
handled = true;
break;
case 82: // 'r'
PDFView.rotatePages(-90);
break;
}
}
if (cmd === 2) { // alt-key
switch (evt.keyCode) {
case 37: // left arrow
if (PresentationMode.active) {
PDFHistory.back();
handled = true;
}
break;
case 39: // right arrow
if (PresentationMode.active) {
PDFHistory.forward();
handled = true;
}
break;
}
}
if (handled) {
evt.preventDefault();
PDFView.clearMouseScrollState();
}
});
window.addEventListener('beforeprint', function beforePrint(evt) {
PDFView.beforePrint();
});
window.addEventListener('afterprint', function afterPrint(evt) {
PDFView.afterPrint();
});
(function animationStartedClosure() {
// The offsetParent is not set until the pdf.js iframe or object is visible.
// Waiting for first animation.
var requestAnimationFrame = window.requestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function startAtOnce(callback) { callback(); };
PDFView.animationStartedPromise = new Promise(function (resolve) {
requestAnimationFrame(function onAnimationFrame() {
resolve();
});
});
})();
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