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videopdf/static/viewer.js

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/* -*- 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 */
'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 MIN_SCALE = 0.25;
var MAX_SCALE = 4.0;
var IMAGE_DIR = '/static/images/';
var SETTINGS_MEMORY = 20;
var ANNOT_MIN_SIZE = 10;
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.workerSrc = '/static/pdf.js';
var mozL10n = document.mozL10n || document.webL10n;
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);
}
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, offsetY = element.offsetTop;
if (!parent) {
console.error('offsetParent is not set -- cannot scroll');
return;
}
while (parent.clientHeight == parent.scrollHeight) {
offsetY += parent.offsetTop;
parent = parent.offsetParent;
if (!parent)
return; // no need to scroll
}
if (spot)
offsetY += spot.top;
parent.scrollTop = offsetY;
}
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 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 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;
}
ProgressBar.prototype = {
updateBar: function ProgressBar_updateBar() {
if (this._indeterminate) {
this.div.classList.add('indeterminate');
return;
}
var progressSize = this.width * this._percent / 100;
if (this._percent > 95)
this.div.classList.add('full');
else
this.div.classList.remove('full');
this.div.classList.remove('indeterminate');
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();
}
};
return ProgressBar;
})();
// Settings Manager - This is a utility for saving settings
// First we see if localStorage is available
// If not, we use FUEL in FF
// Use asyncStorage for B2G
var Settings = (function SettingsClosure() {
var isLocalStorageEnabled = (function localStorageEnabledTest() {
// 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;
}
})();
function Settings(fingerprint) {
this.fingerprint = fingerprint;
this.initializedPromise = new PDFJS.Promise();
var resolvePromise = (function settingsResolvePromise(db) {
this.initialize(db || '{}');
this.initializedPromise.resolve();
}).bind(this);
if (isLocalStorageEnabled)
resolvePromise(localStorage.getItem('database'));
}
Settings.prototype = {
initialize: function settingsInitialize(database) {
database = JSON.parse(database);
if (!('files' in database))
database.files = [];
if (database.files.length >= SETTINGS_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 settingsSet(name, val) {
if (!this.initializedPromise.isResolved)
return;
var file = this.file;
file[name] = val;
var database = JSON.stringify(this.database);
if (isLocalStorageEnabled)
localStorage.setItem('database', database);
},
get: function settingsGet(name, defaultValue) {
if (!this.initializedPromise.isResolved)
return defaultValue;
return this.file[name] || defaultValue;
}
};
return Settings;
})();
var cache = new Cache(CACHE_SIZE);
var currentPageNumber = 1;
var PDFFindController = {
startedTextExtraction: false,
extractTextPromises: [],
// 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,
initialize: function() {
var events = [
'find',
'findagain',
'findhighlightallchange',
'findcasesensitivitychange'
];
this.handleEvent = this.handleEvent.bind(this);
for (var i = 0; i < events.length; i++) {
window.addEventListener(events[i], this.handleEvent);
}
},
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 = [];
for (var i = 0, ii = PDFView.pdfDocument.numPages; i < ii; i++) {
this.extractTextPromises.push(new PDFJS.Promise());
}
var self = this;
function extractPageText(pageIndex) {
PDFView.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);
self.extractTextPromises[pageIndex].resolve(pageIndex);
if ((pageIndex + 1) < PDFView.pages.length)
extractPageText(pageIndex + 1);
}
);
}
extractPageText(0);
return this.extractTextPromise;
},
handleEvent: function(e) {
if (this.state === null || e.type !== 'findagain') {
this.dirtyMatch = true;
}
this.state = e.detail;
this.updateUIState(FindStates.FIND_PENDING);
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();
}
},
updatePage: function(idx) {
var page = PDFView.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 pages = PDFView.pages;
var previous = this.state.findPrevious;
var numPages = PDFView.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 = previous ? numPages - 1 : 0;
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.
this.extractTextPromises[i].onData(function(pageIdx) {
// Use a timeout since all the pages may already be extracted and we
// want to start highlighting before finding all the matches.
setTimeout(function() {
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 (PDFView.supportsIntegratedFind) {
FirefoxCom.request('updateFindControlState',
{result: state, findPrevious: previous});
return;
}
PDFFindBar.updateUIState(state, previous);
}
};
var PDFFindBar = {
// TODO: Enable the FindBar *AFTER* the pagesPromise in the load function
// got resolved
opened: false,
initialize: function() {
this.bar = document.getElementById('findbar');
this.toggleButton = document.getElementById('viewFind');
this.findField = document.getElementById('findInput');
this.highlightAll = document.getElementById('findHighlightAll');
this.caseSensitive = document.getElementById('findMatchCase');
this.findMsg = document.getElementById('findMsg');
this.findStatusIcon = document.getElementById('findStatusIcon');
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;
}
});
document.getElementById('findPrevious').addEventListener('click',
function() { self.dispatchEvent('again', true); }
);
document.getElementById('findNext').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) return;
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();
}
}
};
var PDFView = {
pages: [],
thumbnails: [],
currentScale: UNKNOWN_SCALE,
currentScaleValue: null,
initialBookmark: document.location.hash.substring(1),
startedTextExtraction: false,
pageText: [],
container: null,
thumbnailContainer: null,
initialized: false,
fellback: false,
pdfDocument: null,
sidebarOpen: false,
pageViewScroll: null,
thumbnailViewScroll: null,
isFullscreen: false,
previousScale: null,
pageRotation: 0,
mouseScrollTimeStamp: 0,
mouseScrollDelta: 0,
lastScroll: 0,
previousPageNumber: 1,
// 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();
PDFFindController.initialize();
this.initialized = true;
container.addEventListener('scroll', function() {
self.lastScroll = Date.now();
}, false);
},
// 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);
},
setScale: function pdfViewSetScale(val, resetAutoSettings, noScroll) {
if (val == this.currentScale)
return;
var pages = this.pages;
for (var i = 0; i < pages.length; i++)
pages[i].update(val * CSS_UNITS);
if (!noScroll && this.currentScale != val)
this.pages[this.page - 1].scrollIntoView();
this.currentScale = val;
var event = document.createEvent('UIEvents');
event.initUIEvent('scalechange', false, false, window, 0);
event.scale = val;
event.resetAutoSettings = resetAutoSettings;
window.dispatchEvent(event);
},
parseScale: function pdfViewParseScale(value, resetAutoSettings, noScroll) {
if ('custom' == value)
return;
var scale = parseFloat(value);
this.currentScaleValue = value;
if (scale) {
this.setScale(scale, true, noScroll);
return;
}
var container = this.container;
var currentPage = this.pages[this.page - 1];
if (!currentPage) {
return;
}
var pageWidthScale = (container.clientWidth - SCROLLBAR_PADDING) /
currentPage.width * currentPage.scale / CSS_UNITS;
var pageHeightScale = (container.clientHeight - VERTICAL_PADDING) /
currentPage.height * currentPage.scale / CSS_UNITS;
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(1.0, pageWidthScale);
break;
}
this.setScale(scale, resetAutoSettings, noScroll);
selectScaleOption(value);
},
zoomIn: function pdfViewZoomIn() {
var newScale = (this.currentScale * DEFAULT_SCALE_DELTA).toFixed(2);
newScale = Math.min(MAX_SCALE, newScale);
this.parseScale(newScale, true);
},
zoomOut: function pdfViewZoomOut() {
var newScale = (this.currentScale / DEFAULT_SCALE_DELTA).toFixed(2);
newScale = Math.max(MIN_SCALE, newScale);
this.parseScale(newScale, true);
},
set page(val) {
var pages = this.pages;
var input = document.getElementById('pageNumber');
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;
// Disable fullscreen button if we're in an iframe
if (!!window.frameElement)
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 isHorizontalScrollbarEnabled() {
var div = document.getElementById('viewerContainer');
return div.scrollWidth > div.clientWidth;
},
initPassiveLoading: function pdfViewInitPassiveLoading() {
if (!PDFView.loadingBar) {
PDFView.loadingBar = new ProgressBar('#loadingBar', {});
}
window.addEventListener('message', function window_message(e) {
var args = e.data;
if (typeof args !== 'object' || !('pdfjsLoadAction' in args))
return;
switch (args.pdfjsLoadAction) {
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;
},
open: function pdfViewOpen(url, scale, password) {
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 (!PDFView.loadingBar) {
PDFView.loadingBar = new ProgressBar('#loadingBar', {});
}
this.pdfDocument = null;
var self = this;
self.loading = true;
PDFJS.getDocument(parameters).then(
function getDocumentCallback(pdfDocument) {
self.load(pdfDocument, scale);
self.loading = false;
},
function getDocumentError(message, exception) {
if (exception && exception.name === 'PasswordException') {
if (exception.code === 'needpassword') {
var promptString = mozL10n.get('request_password', null,
'PDF is protected by a password:');
password = prompt(promptString);
if (password && password.length > 0) {
return PDFView.open(url, scale, password);
}
}
}
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 loadingIndicator = document.getElementById('loading');
loadingIndicator.textContent = mozL10n.get('loading_error_indicator',
null, 'Error');
var moreInfo = {
message: message
};
self.error(loadingErrorMessage, moreInfo);
self.loading = false;
},
function getDocumentProgress(progressData) {
self.progress(progressData.loaded / progressData.total);
}
);
},
download: function pdfViewDownload() {
function noData() {
FirefoxCom.request('download', { originalUrl: url });
}
var url = this.url.split('#')[0];
url += '#pdfjs.action=download';
window.open(url, '_parent');
},
fallback: function pdfViewFallback() {
return;
},
navigateTo: function pdfViewNavigateTo(dest) {
if (typeof dest === 'string')
dest = this.destinations[dest];
if (!(dest instanceof Array))
return; // invalid destination
// dest array looks like that: <page-ref> </XYZ|FitXXX> <args..>
var destRef = dest[0];
var pageNumber = destRef instanceof Object ?
this.pagesRefMap[destRef.num + ' ' + destRef.gen + ' R'] : (destRef + 1);
if (pageNumber > this.pages.length)
pageNumber = this.pages.length;
if (pageNumber) {
this.page = pageNumber;
var currentPage = this.pages[pageNumber - 1];
currentPage.scrollIntoView(dest);
}
},
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.currentScale);
pdfOpenParams += '&zoom=' + (scale * 100);
if (dest[2] || dest[3]) {
pdfOpenParams += ',' + (dest[2] || 0) + ',' + (dest[3] || 0);
}
}
return pdfOpenParams;
}
}
return '';
},
/**
* For the firefox extension we prefix the full url on anchor links so they
* don't come up as resource:// urls and so open in new tab/window works.
* @param {String} anchor The anchor hash include the #.
*/
getAnchorUrl: function getAnchorUrl(anchor) {
return anchor;
},
/**
* 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.
*/
getOutputScale: function pdfViewGetOutputDPI() {
var pixelRatio = 'devicePixelRatio' in window ? window.devicePixelRatio : 1;
return {
sx: pixelRatio,
sy: pixelRatio,
scaled: pixelRatio != 1
};
},
/**
* 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 loadingBox = document.getElementById('loadingBox');
loadingBox.setAttribute('hidden', 'true');
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');
};
lessInfoButton.onclick = function() {
errorMoreInfo.setAttribute('hidden', 'true');
moreInfoButton.removeAttribute('hidden');
lessInfoButton.setAttribute('hidden', 'true');
};
moreInfoButton.removeAttribute('hidden');
lessInfoButton.setAttribute('hidden', 'true');
errorMoreInfo.value = moreInfoText;
errorMoreInfo.rows = moreInfoText.split('\n').length - 1;
},
progress: function pdfViewProgress(level) {
var percent = Math.round(level * 100);
PDFView.loadingBar.percent = percent;
},
load: function pdfViewLoad(pdfDocument, scale) {
function bindOnAfterDraw(pageView, thumbnailView) {
// when page is painted, using the image as thumbnail base
pageView.onAfterDraw = function pdfViewLoadOnAfterDraw() {
thumbnailView.setImage(pageView.canvas);
};
}
this.pdfDocument = pdfDocument;
var errorWrapper = document.getElementById('errorWrapper');
errorWrapper.setAttribute('hidden', 'true');
var loadingBox = document.getElementById('loadingBox');
loadingBox.setAttribute('hidden', 'true');
var loadingIndicator = document.getElementById('loading');
loadingIndicator.textContent = '';
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;
PDFView.documentFingerprint = id;
var store = PDFView.store = new Settings(id);
var storePromise = store.initializedPromise;
this.pageRotation = 0;
var pages = this.pages = [];
this.pageText = [];
this.startedTextExtraction = false;
var pagesRefMap = {};
var thumbnails = this.thumbnails = [];
var pagePromises = [];
for (var i = 1; i <= pagesCount; i++)
pagePromises.push(pdfDocument.getPage(i));
var self = this;
var pagesPromise = PDFJS.Promise.all(pagePromises);
pagesPromise.then(function(promisedPages) {
for (var i = 1; i <= pagesCount; i++) {
var page = promisedPages[i - 1];
var pageView = new PageView(container, page, i, scale,
page.stats, self.navigateTo.bind(self));
var thumbnailView = new ThumbnailView(thumbsView, page, i);
bindOnAfterDraw(pageView, thumbnailView);
pages.push(pageView);
thumbnails.push(thumbnailView);
var pageRef = page.ref;
pagesRefMap[pageRef.num + ' ' + pageRef.gen + ' R'] = i;
}
self.pagesRefMap = pagesRefMap;
});
var destinationsPromise = pdfDocument.getDestinations();
destinationsPromise.then(function(destinations) {
self.destinations = destinations;
});
// outline and initial view depends on destinations and pagesRefMap
var promises = [pagesPromise, destinationsPromise, storePromise,
PDFView.animationStartedPromise];
PDFJS.Promise.all(promises).then(function() {
pdfDocument.getOutline().then(function(outline) {
self.outline = new DocumentOutlineView(outline);
});
var storedHash = null;
if (store.get('exists', false)) {
var page = store.get('page', '1');
var zoom = store.get('zoom', PDFView.currentScale);
var left = store.get('scrollLeft', '0');
var top = store.get('scrollTop', '0');
if(document.location.hash) {
page = document.location.hash.substring(1);
}
storedHash = 'page=' + page + '&zoom=' + zoom + ',' + left + ',' + top;
}
self.setInitialView(storedHash, scale);
});
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) {
// AcroForm/XFA was found
PDFView.fallback();
}
});
},
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;
if (this.initialBookmark) {
this.setHash(this.initialBookmark);
this.initialBookmark = null;
}
else if (storedHash)
this.setHash(storedHash);
else if (scale) {
this.parseScale(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.parseScale(DEFAULT_SCALE, true);
}
},
renderHighestPriority: function pdfViewRenderHighestPriority() {
// 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');
}
},
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 pdfViewNeedsRendering(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) {
PDFView.navigateTo(params.nameddest);
return;
}
if ('page' in params) {
var 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;
var dest = [null, {name: 'XYZ'}, (zoomArgs[1] | 0),
(zoomArgs[2] | 0), zoomArg];
var currentPage = this.pages[pageNumber - 1];
currentPage.scrollIntoView(dest);
} else {
this.page = pageNumber; // simple page
}
}
} else if (/^\d+$/.test(hash)) // page number
this.page = hash;
else // named destination
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, true);
},
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 currentHeight = 0, view;
var top = scrollEl.scrollTop;
for (var i = 1, ii = views.length; i <= ii; ++i) {
view = views[i - 1];
currentHeight = view.el.offsetTop;
if (currentHeight + view.el.clientHeight > top)
break;
currentHeight += view.el.clientHeight;
}
var visible = [];
// Algorithm broken in fullscreen mode
if (this.isFullscreen) {
var currentPage = this.pages[this.page - 1];
visible.push({
id: currentPage.id,
view: currentPage
});
return { first: currentPage, last: currentPage, views: visible};
}
var bottom = top + scrollEl.clientHeight;
var nextHeight, hidden, percent, viewHeight;
for (; i <= ii && currentHeight < bottom; ++i) {
view = views[i - 1];
viewHeight = view.el.clientHeight;
currentHeight = view.el.offsetTop;
nextHeight = currentHeight + viewHeight;
hidden = Math.max(0, top - currentHeight) +
Math.max(0, nextHeight - bottom);
percent = Math.floor((viewHeight - hidden) * 100.0 / viewHeight);
visible.push({ id: view.id, y: currentHeight,
view: view, percent: percent });
currentHeight = nextHeight;
}
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[unescape(key)] = unescape(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 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);
},
fullscreen: function pdfViewFullscreen() {
var isFullscreen = document.fullscreenElement || document.mozFullScreen ||
document.webkitIsFullScreen;
if (isFullscreen) {
return false;
}
var wrapper = document.getElementById('viewerContainer');
if (document.documentElement.requestFullscreen) {
wrapper.requestFullscreen();
} else if (document.documentElement.mozRequestFullScreen) {
wrapper.mozRequestFullScreen();
} else if (document.documentElement.webkitRequestFullScreen) {
wrapper.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
} else {
return false;
}
this.isFullscreen = true;
var currentPage = this.pages[this.page - 1];
this.previousScale = this.currentScaleValue;
this.parseScale('page-fit', true);
// Wait for fullscreen to take effect
setTimeout(function() {
currentPage.scrollIntoView();
}, 0);
this.showPresentationControls();
return true;
},
exitFullscreen: function pdfViewExitFullscreen() {
this.isFullscreen = false;
this.parseScale(this.previousScale);
this.page = this.page;
this.clearMouseScrollState();
this.hidePresentationControls();
},
showPresentationControls: function pdfViewShowPresentationControls() {
var DELAY_BEFORE_HIDING_CONTROLS = 3000;
var wrapper = document.getElementById('viewerContainer');
if (this.presentationControlsTimeout) {
clearTimeout(this.presentationControlsTimeout);
} else {
wrapper.classList.add('presentationControls');
}
this.presentationControlsTimeout = setTimeout(function hideControls() {
wrapper.classList.remove('presentationControls');
delete PDFView.presentationControlsTimeout;
}, DELAY_BEFORE_HIDING_CONTROLS);
},
hidePresentationControls: function pdfViewShowPresentationControls() {
if (!this.presentationControlsTimeout) {
return;
}
clearTimeout(this.presentationControlsTimeout);
delete this.presentationControlsTimeout;
var wrapper = document.getElementById('viewerContainer');
wrapper.classList.remove('presentationControls');
},
rotatePages: function pdfViewPageRotation(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.updateRotation(this.pageRotation);
}
var currentPage = this.pages[this.page - 1];
this.parseScale(this.currentScaleValue, true);
this.renderHighestPriority();
// Wait for fullscreen 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 fullscreen 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, pdfPage, id, scale,
stats, navigateTo) {
this.id = id;
this.pdfPage = pdfPage;
this.rotation = 0;
this.scale = scale || 1.0;
this.viewport = this.pdfPage.getViewport(this.scale, this.pdfPage.rotate);
this.renderingState = RenderingStates.INITIAL;
this.resume = null;
this.textContent = null;
this.textLayer = 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.destroy = function pageViewDestroy() {
this.update();
this.pdfPage.destroy();
};
this.update = function pageViewUpdate(scale, rotation) {
this.renderingState = RenderingStates.INITIAL;
this.resume = null;
if (typeof rotation !== 'undefined') {
this.rotation = rotation;
}
this.scale = scale || this.scale;
var totalRotation = (this.rotation + this.pdfPage.rotate) % 360;
var viewport = this.pdfPage.getViewport(this.scale, totalRotation);
this.viewport = viewport;
div.style.width = Math.floor(viewport.width) + 'px';
div.style.height = Math.floor(viewport.height) + 'px';
while (div.hasChildNodes())
div.removeChild(div.lastChild);
div.removeAttribute('data-loaded');
delete this.canvas;
this.loadingIconDiv = document.createElement('div');
this.loadingIconDiv.className = 'loadingIcon';
div.appendChild(this.loadingIconDiv);
};
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
});
function setupAnnotations(pdfPage, viewport) {
function bindLink(link, dest) {
link.href = PDFView.getDestinationHash(dest);
link.onclick = function pageViewSetupLinksOnclick() {
if (dest)
PDFView.navigateTo(dest);
return false;
};
}
function createElementWithStyle(tagName, item, rect) {
if (!rect) {
rect = viewport.convertToViewportRectangle(item.rect);
rect = PDFJS.Util.normalizeRect(rect);
}
var element = document.createElement(tagName);
element.style.left = Math.floor(rect[0]) + 'px';
element.style.top = Math.floor(rect[1]) + 'px';
element.style.width = Math.ceil(rect[2] - rect[0]) + 'px';
element.style.height = Math.ceil(rect[3] - rect[1]) + 'px';
return element;
}
function createTextAnnotation(item) {
var container = document.createElement('section');
container.className = 'annotText';
var rect = viewport.convertToViewportRectangle(item.rect);
rect = PDFJS.Util.normalizeRect(rect);
// sanity check because of OOo-generated PDFs
if ((rect[3] - rect[1]) < ANNOT_MIN_SIZE) {
rect[3] = rect[1] + ANNOT_MIN_SIZE;
}
if ((rect[2] - rect[0]) < ANNOT_MIN_SIZE) {
rect[2] = rect[0] + (rect[3] - rect[1]); // make it square
}
var image = createElementWithStyle('img', item, rect);
var iconName = item.name;
image.src = IMAGE_DIR + 'annotation-' +
iconName.toLowerCase() + '.svg';
image.alt = mozL10n.get('text_annotation_type', {type: iconName},
'[{{type}} Annotation]');
var content = document.createElement('div');
content.setAttribute('hidden', true);
var title = document.createElement('h1');
var text = document.createElement('p');
content.style.left = Math.floor(rect[2]) + 'px';
content.style.top = Math.floor(rect[1]) + 'px';
title.textContent = item.title;
if (!item.content && !item.title) {
content.setAttribute('hidden', true);
} else {
var e = document.createElement('span');
var lines = item.content.split(/(?:\r\n?|\n)/);
for (var i = 0, ii = lines.length; i < ii; ++i) {
var line = lines[i];
e.appendChild(document.createTextNode(line));
if (i < (ii - 1))
e.appendChild(document.createElement('br'));
}
text.appendChild(e);
image.addEventListener('mouseover', function annotationImageOver() {
content.removeAttribute('hidden');
}, false);
image.addEventListener('mouseout', function annotationImageOut() {
content.setAttribute('hidden', true);
}, false);
}
content.appendChild(title);
content.appendChild(text);
container.appendChild(image);
container.appendChild(content);
return container;
}
pdfPage.getAnnotations().then(function(items) {
for (var i = 0; i < items.length; i++) {
var item = items[i];
switch (item.type) {
case 'Link':
var link = createElementWithStyle('a', item);
link.href = item.url || '';
if (!item.url)
bindLink(link, ('dest' in item) ? item.dest : null);
div.appendChild(link);
break;
case 'Text':
var textAnnotation = createTextAnnotation(item);
if (textAnnotation)
div.appendChild(textAnnotation);
break;
}
}
});
}
this.getPagePoint = function pageViewGetPagePoint(x, y) {
return this.viewport.convertToPdfPoint(x, y);
};
this.scrollIntoView = function pageViewScrollIntoView(dest) {
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];
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 = (this.container.clientWidth - SCROLLBAR_PADDING) /
width / CSS_UNITS;
heightScale = (this.container.clientHeight - SCROLLBAR_PADDING) /
height / CSS_UNITS;
scale = Math.min(widthScale, heightScale);
break;
default:
return;
}
if (scale && scale !== PDFView.currentScale)
PDFView.parseScale(scale, true, true);
else if (PDFView.currentScale === UNKNOWN_SCALE)
PDFView.parseScale(DEFAULT_SCALE, true, true);
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() {
if (!this.textContent) {
this.textContent = this.pdfPage.getTextContent();
}
return this.textContent;
};
this.draw = function pageviewDraw(callback) {
if (this.renderingState !== RenderingStates.INITIAL) {
console.error('Must be in new state before drawing');
}
this.renderingState = RenderingStates.RUNNING;
var canvas = document.createElement('canvas');
canvas.id = 'page' + this.id;
canvas.mozOpaque = true;
div.appendChild(canvas);
this.canvas = canvas;
var textLayerDiv = null;
if (!PDFJS.disableTextLayer) {
textLayerDiv = document.createElement('div');
textLayerDiv.className = 'textLayer';
div.appendChild(textLayerDiv);
}
var imageLayerDiv = document.createElement('div');
imageLayerDiv.className = 'imageLayer';
div.appendChild(imageLayerDiv);
var textLayer = this.textLayer =
textLayerDiv ? new TextLayerBuilder(textLayerDiv, this.id - 1) : null;
var imageLayer = getVideoOverlay(this.id);
if(imageLayer) {
imageLayer.div = imageLayerDiv;
}
var scale = this.scale, viewport = this.viewport;
var outputScale = PDFView.getOutputScale();
canvas.width = Math.floor(viewport.width) * outputScale.sx;
canvas.height = Math.floor(viewport.height) * outputScale.sy;
if (outputScale.scaled) {
var cssScale = 'scale(' + (1 / outputScale.sx) + ', ' +
(1 / outputScale.sy) + ')';
CustomStyle.setProp('transform' , canvas, cssScale);
CustomStyle.setProp('transformOrigin' , canvas, '0% 0%');
if (textLayerDiv) {
CustomStyle.setProp('transform' , textLayerDiv, cssScale);
CustomStyle.setProp('transformOrigin' , textLayerDiv, '0% 0%');
}
CustomStyle.setProp('transform' , imageLayerDiv, cssScale);
CustomStyle.setProp('transformOrigin' , imageLayerDiv, '0% 0%');
}
var ctx = canvas.getContext('2d');
// TODO(mack): use data attributes to store these
ctx._scaleX = outputScale.sx;
ctx._scaleY = outputScale.sy;
ctx.save();
ctx.fillStyle = 'rgb(255, 255, 255)';
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.restore();
if (outputScale.scaled) {
ctx.scale(outputScale.sx, outputScale.sy);
}
// Rendering area
var self = this;
var renderingWasReset = false;
function pageViewDrawCallback(error) {
if (renderingWasReset) {
return;
}
self.renderingState = RenderingStates.FINISHED;
if (self.loadingIconDiv) {
div.removeChild(self.loadingIconDiv);
delete self.loadingIconDiv;
}
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);
callback();
}
var renderContext = {
canvasContext: ctx,
viewport: this.viewport,
textLayer: textLayer,
imageLayer: imageLayer,
continueCallback: function pdfViewcContinueCallback(cont) {
if (self.renderingState === RenderingStates.INITIAL) {
// The page update() was called, we just need to abort any rendering.
renderingWasReset = true;
return;
}
if (PDFView.highestPriorityPage !== 'page' + self.id) {
self.renderingState = RenderingStates.PAUSED;
self.resume = function resumeCallback() {
self.renderingState = RenderingStates.RUNNING;
cont();
};
return;
}
cont();
}
};
this.pdfPage.render(renderContext).then(
function pdfPageRenderCallback() {
pageViewDrawCallback(null);
},
function pdfPageRenderError(error) {
pageViewDrawCallback(error);
}
);
if (textLayer) {
this.getTextContent().then(
function textContentResolved(textContent) {
textLayer.setTextContent(textContent);
}
);
}
setupAnnotations(this.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 = this.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');
printContainer.appendChild(canvas);
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).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 (PDFJS.pdfBug && Stats.enabled) {
var stats = this.stats;
Stats.add(this.id, stats);
}
};
};
var ThumbnailView = function thumbnailView(container, pdfPage, id) {
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;
};
var rotation = 0;
var totalRotation = (rotation + pdfPage.rotate) % 360;
var viewport = pdfPage.getViewport(1, totalRotation);
var pageWidth = this.width = viewport.width;
var pageHeight = this.height = viewport.height;
var pageRatio = pageWidth / pageHeight;
this.id = id;
var canvasWidth = 98;
var canvasHeight = canvasWidth / this.width * this.height;
var scaleX = this.scaleX = (canvasWidth / pageWidth);
var scaleY = this.scaleY = (canvasHeight / pageHeight);
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 = canvasWidth + 'px';
ring.style.height = canvasHeight + 'px';
div.appendChild(ring);
anchor.appendChild(div);
container.appendChild(anchor);
this.hasImage = false;
this.renderingState = RenderingStates.INITIAL;
this.updateRotation = function(rot) {
rotation = rot;
totalRotation = (rotation + pdfPage.rotate) % 360;
viewport = pdfPage.getViewport(1, totalRotation);
pageWidth = this.width = viewport.width;
pageHeight = this.height = viewport.height;
pageRatio = pageWidth / pageHeight;
canvasHeight = canvasWidth / this.width * this.height;
scaleX = this.scaleX = (canvasWidth / pageWidth);
scaleY = this.scaleY = (canvasHeight / pageHeight);
div.removeAttribute('data-loaded');
ring.textContent = '';
ring.style.width = canvasWidth + 'px';
ring.style.height = canvasHeight + 'px';
this.hasImage = false;
this.renderingState = RenderingStates.INITIAL;
this.resume = null;
};
function getPageDrawContext() {
var canvas = document.createElement('canvas');
canvas.id = 'thumbnail' + id;
canvas.mozOpaque = true;
canvas.width = canvasWidth;
canvas.height = 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, canvasWidth, canvasHeight);
ctx.restore();
return ctx;
}
this.drawingRequired = function thumbnailViewDrawingRequired() {
return !this.hasImage;
};
this.draw = function thumbnailViewDraw(callback) {
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 = getPageDrawContext();
var drawViewport = pdfPage.getViewport(scaleX, totalRotation);
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();
}
};
pdfPage.render(renderContext).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.hasImage || !img)
return;
this.renderingState = RenderingStates.FINISHED;
var ctx = getPageDrawContext();
ctx.drawImage(img, 0, 0, img.width, img.height,
0, 0, ctx.canvas.width, ctx.canvas.height);
this.hasImage = true;
};
};
var DocumentOutlineView = function documentOutlineView(outline) {
var outlineView = document.getElementById('outlineView');
while (outlineView.firstChild)
outlineView.removeChild(outlineView.firstChild);
function bindItemLink(domObj, item) {
domObj.href = PDFView.getDestinationHash(item.dest);
domObj.onclick = function documentOutlineViewOnclick(e) {
PDFView.navigateTo(item.dest);
return false;
};
}
if (!outline) {
var noOutline = document.createElement('div');
noOutline.classList.add('noOutline');
noOutline.textContent = mozL10n.get('no_outline', null,
'No Outline Available');
outlineView.appendChild(noOutline);
return;
}
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);
}
}
};
// 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;
})();
var TextLayerBuilder = function textLayerBuilder(textLayerDiv, pageIdx) {
var textLayerFrag = document.createDocumentFragment();
this.textLayerDiv = textLayerDiv;
this.layoutDone = false;
this.divContentDone = false;
this.pageIdx = pageIdx;
this.matches = [];
this.beginLayout = function textLayerBuilderBeginLayout() {
this.textDivs = [];
this.textLayerQueue = [];
this.renderingDone = false;
};
this.endLayout = function textLayerBuilderEndLayout() {
this.layoutDone = true;
this.insertDivContent();
};
this.renderLayer = function textLayerBuilderRenderLayer() {
var self = this;
var textDivs = this.textDivs;
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];
textLayerFrag.appendChild(textDiv);
ctx.font = textDiv.style.fontSize + ' ' + textDiv.style.fontFamily;
var width = ctx.measureText(textDiv.textContent).width;
if (width > 0) {
var textScale = textDiv.dataset.canvasWidth / width;
CustomStyle.setProp('transform' , textDiv,
'scale(' + textScale + ', 1)');
CustomStyle.setProp('transformOrigin' , textDiv, '0% 0%');
textLayerDiv.appendChild(textDiv);
}
}
this.renderingDone = true;
this.updateMatches();
textLayerDiv.appendChild(textLayerFrag);
};
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;
if (Date.now() - PDFView.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 * geom.vScale;
textDiv.dataset.canvasWidth = geom.canvasWidth * geom.hScale;
textDiv.dataset.fontName = geom.fontName;
textDiv.style.fontSize = fontHeight + 'px';
textDiv.style.fontFamily = geom.fontFamily;
textDiv.style.left = geom.x + 'px';
textDiv.style.top = (geom.y - fontHeight) + '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];
textDiv.textContent = bidiText.str;
textDiv.dir = bidiText.ltr ? 'ltr' : 'rtl';
}
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.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 = this.pageIdx === PDFFindController.selected.pageIdx;
var selectedMatchIdx = PDFFindController.selected.matchIdx;
var highlightAll = 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)
scrollIntoView(textDivs[begin.divIdx], {top: -50});
// 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.active)
return;
// Convert the matches on the page controller into the match format used
// for the textLayer.
this.matches = matches =
this.convertMatches(PDFFindController.pageMatches[this.pageIdx] || []);
this.renderMatches(this.matches);
};
};
document.addEventListener('DOMContentLoaded', function webViewerLoad(evt) {
PDFView.initialize();
var params = PDFView.parseQueryString(document.location.search.substring(1));
var file = params.file || DEFAULT_URL;
//hide unused elements
document.getElementById('openFile').setAttribute('hidden', 'true');
document.getElementById('viewBookmark').setAttribute('hidden', 'true');
if (!window.File || !window.FileReader || !window.FileList || !window.Blob) {
document.getElementById('openFile').setAttribute('hidden', 'true');
} else {
document.getElementById('fileInput').value = null;
}
// 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');
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');
}
if (!PDFView.supportsFullscreen) {
document.getElementById('fullscreen').classList.add('hidden');
}
if (PDFView.supportsIntegratedFind) {
document.querySelector('#viewFind').classList.add('hidden');
}
// Listen for warnings to trigger the fallback UI. Errors should be caught
// and call PDFView.error() so we don't need to listen for those.
PDFJS.LogManager.addLogger({
warn: function() {
PDFView.fallback();
}
});
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.querySelector('.zoomIn').addEventListener('click',
function() {
PDFView.zoomIn();
});
document.querySelector('.zoomOut').addEventListener('click',
function() {
PDFView.zoomOut();
});
document.getElementById('fullscreen').addEventListener('click',
function() {
PDFView.fullscreen();
});
document.getElementById('openFile').addEventListener('click',
function() {
document.getElementById('fileInput').click();
});
document.getElementById('print').addEventListener('click',
function() {
window.print();
});
document.getElementById('download').addEventListener('click',
function() {
PDFView.download();
});
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.parseScale(this.value);
});
document.getElementById('first_page').addEventListener('click',
function() {
PDFView.page = 1;
});
document.getElementById('last_page').addEventListener('click',
function() {
PDFView.page = PDFView.pdfDocument.numPages;
});
document.getElementById('page_rotate_ccw').addEventListener('click',
function() {
PDFView.rotatePages(-90);
});
document.getElementById('page_rotate_cw').addEventListener('click',
function() {
PDFView.rotatePages(90);
});
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;
}
if (!PDFView.isFullscreen) {
updateViewarea.inProgress = true; // used in "set page"
PDFView.page = currentId;
updateViewarea.inProgress = false;
}
var currentScale = PDFView.currentScale;
var currentScaleValue = PDFView.currentScaleValue;
var normalizedScaleValue = currentScaleValue == currentScale ?
currentScale * 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.location.hash = '#page=' + pageNumber;
}
window.addEventListener('resize', function webViewerResize(evt) {
if (PDFView.initialized &&
(document.getElementById('pageWidthOption').selected ||
document.getElementById('pageFitOption').selected ||
document.getElementById('pageAutoOption').selected))
PDFView.parseScale(document.getElementById('scaleSelect').value);
updateViewarea();
});
window.addEventListener('hashchange', function webViewerHashchange(evt) {
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('download').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();
// Adjust the width of the zoom box to fit the content.
var container = document.getElementById('scaleSelectContainer');
var select = document.getElementById('scaleSelect');
select.setAttribute('style', 'min-width: inherit;');
var width = select.clientWidth + 8;
container.setAttribute('style', 'min-width: ' + width + 'px; ' +
'max-width: ' + width + 'px;');
select.setAttribute('style', 'min-width: ' + (width + 20) + 'px;');
}, true);
window.addEventListener('scalechange', function scalechange(evt) {
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;
}
document.getElementById('zoom_out').disabled = (evt.scale === MIN_SCALE);
document.getElementById('zoom_in').disabled = (evt.scale === MAX_SCALE);
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);
}
}
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';
for (var i = 0, length = Math.abs(ticks); i < length; i++)
PDFView[direction]();
} else if (PDFView.isFullscreen) {
var FIREFOX_DELTA_FACTOR = -40;
PDFView.mouseScroll(evt.detail * FIREFOX_DELTA_FACTOR);
}
}, false);
window.addEventListener('mousemove', function keydown(evt) {
if (PDFView.isFullscreen) {
PDFView.showPresentationControls();
}
}, false);
window.addEventListener('mousedown', function mousedown(evt) {
if (PDFView.isFullscreen && evt.button === 0) {
// Mouse click in fullmode advances a page
evt.preventDefault();
PDFView.page++;
}
}, false);
window.addEventListener('keydown', function keydown(evt) {
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) { // either CTRL or META key.
switch (evt.keyCode) {
case 70:
if (!PDFView.supportsIntegratedFind) {
PDFFindBar.toggle();
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
PDFView.parseScale(DEFAULT_SCALE, true);
handled = true;
break;
}
}
// CTRL or META with or without SHIFT.
if (cmd == 1 || cmd == 8 || cmd == 5 || cmd == 12) {
switch (evt.keyCode) {
case 71: // g
if (!PDFView.supportsIntegratedFind) {
PDFFindBar.dispatchEvent('again', cmd == 5 || cmd == 12);
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;
if (curElement && (curElement.tagName == 'INPUT' ||
curElement.tagName == 'SELECT')) {
return;
}
var controlsElement = document.getElementById('toolbar');
while (curElement) {
if (curElement === controlsElement && !PDFView.isFullscreen)
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 (!PDFView.isFullscreen && PDFView.currentScaleValue !== 'page-fit') {
break;
}
/* in fullscreen 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 (!PDFView.supportsIntegratedFind && PDFFindBar.opened) {
PDFFindBar.close();
handled = true;
}
break;
case 40: // down arrow
case 34: // pg down
case 32: // spacebar
if (!PDFView.isFullscreen && 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 (PDFView.isFullscreen) {
PDFView.page = 1;
handled = true;
}
break;
case 35: // end
if (PDFView.isFullscreen) {
PDFView.page = PDFView.pdfDocument.numPages;
handled = true;
}
break;
case 82: // 'r'
PDFView.rotatePages(90);
break;
}
}
if (cmd == 4) { // shift-key
switch (evt.keyCode) {
case 82: // 'r'
PDFView.rotatePages(-90);
break;
}
}
if (handled) {
evt.preventDefault();
PDFView.clearMouseScrollState();
}
});
window.addEventListener('beforeprint', function beforePrint(evt) {
PDFView.beforePrint();
});
window.addEventListener('afterprint', function afterPrint(evt) {
PDFView.afterPrint();
});
(function fullscreenClosure() {
function fullscreenChange(e) {
var isFullscreen = document.fullscreenElement || document.mozFullScreen ||
document.webkitIsFullScreen;
if (!isFullscreen) {
PDFView.exitFullscreen();
}
}
window.addEventListener('fullscreenchange', fullscreenChange, false);
window.addEventListener('mozfullscreenchange', fullscreenChange, false);
window.addEventListener('webkitfullscreenchange', fullscreenChange, false);
})();
(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 PDFJS.Promise();
requestAnimationFrame(function onAnimationFrame() {
PDFView.animationStartedPromise.resolve();
});
})();
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