/* -*- 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.
*/
'use strict';
var kDefaultURL = 'compressed.tracemonkey-pldi-09.pdf';
var kDefaultScale = 'auto';
var kDefaultScaleDelta = 1.1;
var kUnknownScale = 0;
var kCacheSize = 20;
var kCssUnits = 96.0 / 72.0;
var kScrollbarPadding = 40;
var kMinScale = 0.25;
var kMaxScale = 4.0;
var kImageDirectory = './images/';
var kSettingsMemory = 20;
var RenderingStates = {
INITIAL: 0,
RUNNING: 1,
PAUSED: 2,
FINISHED: 3
};
//#if (GENERIC || CHROME)
//PDFJS.workerSrc = '../build/pdf.js';
//#endif
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) {
var parent = element.offsetParent, offsetY = element.offsetTop;
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;
})();
//#if FIREFOX || MOZCENTRAL
//#include firefoxcom.js
//#endif
// Settings Manager - This is a utility for saving settings
// First we see if localStorage is available
// If not, we use FUEL in FF
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) {
var database = null;
var index;
//#if !(FIREFOX || MOZCENTRAL)
if (isLocalStorageEnabled)
database = localStorage.getItem('database') || '{}';
else
return;
//#else
// database = FirefoxCom.requestSync('getDatabase', null) || '{}';
//#endif
database = JSON.parse(database);
if (!('files' in database))
database.files = [];
if (database.files.length >= kSettingsMemory)
database.files.shift();
for (var i = 0, length = database.files.length; i < length; i++) {
var branch = database.files[i];
if (branch.fingerprint == fingerprint) {
index = i;
break;
}
}
if (typeof index != 'number')
index = database.files.push({fingerprint: fingerprint}) - 1;
this.file = database.files[index];
this.database = database;
}
Settings.prototype = {
set: function settingsSet(name, val) {
if (!('file' in this))
return false;
var file = this.file;
file[name] = val;
var database = JSON.stringify(this.database);
//#if !(FIREFOX || MOZCENTRAL)
if (isLocalStorageEnabled)
localStorage.setItem('database', database);
//#else
// FirefoxCom.requestSync('setDatabase', database);
//#endif
},
get: function settingsGet(name, defaultValue) {
if (!('file' in this))
return defaultValue;
return this.file[name] || defaultValue;
}
};
return Settings;
})();
var cache = new Cache(kCacheSize);
var currentPageNumber = 1;
var PDFView = {
pages: [],
thumbnails: [],
currentScale: kUnknownScale,
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,
// called once when the document is loaded
initialize: function pdfViewInitialize() {
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));
this.initialized = true;
},
// 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 * kCssUnits);
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];
var pageWidthScale = (container.clientWidth - kScrollbarPadding) /
currentPage.width * currentPage.scale / kCssUnits;
var pageHeightScale = (container.clientHeight - kScrollbarPadding) /
currentPage.height * currentPage.scale / kCssUnits;
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 * kDefaultScaleDelta).toFixed(2);
newScale = Math.min(kMaxScale, newScale);
this.parseScale(newScale, true);
},
zoomOut: function pdfViewZoomOut() {
var newScale = (this.currentScale / kDefaultScaleDelta).toFixed(2);
newScale = Math.max(kMinScale, 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)) {
event.pageNumber = this.page;
window.dispatchEvent(event);
return;
}
pages[val - 1].updateStats();
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;
Object.defineProperty(this, 'supportsFullScreen', { value: support,
enumerable: true,
configurable: true,
writable: false });
return support;
},
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 {
document.title = decodeURIComponent(getFileName(url)) || url;
} catch (e) {
// decodeURIComponent may throw URIError,
// fall back to using the unprocessed url in that case
document.title = url;
}
},
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 loadingIndicator = document.getElementById('loading');
loadingIndicator.textContent = mozL10n.get('loading_error_indicator',
null, 'Error');
var moreInfo = {
message: message
};
self.error(mozL10n.get('loading_error', null,
'An error occurred while loading the PDF.'), 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];
//#if !(FIREFOX || MOZCENTRAL)
url += '#pdfjs.action=download';
window.open(url, '_parent');
//#else
// // Document isn't ready just try to download with the url.
// if (!this.pdfDocument) {
// noData();
// return;
// }
// this.pdfDocument.getData().then(
// function getDataSuccess(data) {
// var bb = new MozBlobBuilder();
// bb.append(data.buffer);
// var blobUrl = window.URL.createObjectURL(
// bb.getBlob('application/pdf'));
//
// FirefoxCom.request('download', { blobUrl: blobUrl, originalUrl: url },
// function response(err) {
// if (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.');
// }
// window.URL.revokeObjectURL(blobUrl);
// }
// );
// },
// noData // Error occurred try downloading with just the url.
// );
//#endif
},
fallback: function pdfViewFallback() {
//#if !(FIREFOX || MOZCENTRAL)
// return;
//#else
// // Only trigger the fallback once so we don't spam the user with messages
// // for one PDF.
// if (this.fellback)
// return;
// this.fellback = true;
// var url = this.url.split('#')[0];
// FirefoxCom.request('fallback', url, function response(download) {
// if (!download)
// return;
// PDFView.download();
// });
//#endif
},
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) {
//#if !(FIREFOX || MOZCENTRAL)
return anchor;
//#else
// return this.url.split('#')[0] + anchor;
//#endif
},
/**
* 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_build', {build: PDFJS.build},
'PDF.JS 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');
//#if !(FIREFOX || MOZCENTRAL)
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;
//#else
// console.error(message + '\n' + moreInfoText);
// this.fallback();
//#endif
},
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;
var storedHash = null;
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);
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');
storedHash = 'page=' + page + '&zoom=' + zoom + ',' + left + ',' + top;
}
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
PDFJS.Promise.all([pagesPromise, destinationsPromise]).then(function() {
pdfDocument.getOutline().then(function(outline) {
self.outline = new DocumentOutlineView(outline);
});
self.setInitialView(storedHash, scale);
});
pdfDocument.getMetadata().then(function(data) {
var info = data.info, metadata = data.metadata;
self.documentInfo = info;
self.metadata = metadata;
var pdfTitle;
if (metadata) {
if (metadata.has('dc:title'))
pdfTitle = metadata.get('dc:title');
}
if (!pdfTitle && info && info['Title'])
pdfTitle = info['Title'];
if (pdfTitle)
document.title = pdfTitle + ' - ' + document.title;
});
},
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 === kUnknownScale) {
// Scale was not initialized: invalid bookmark or scale was not specified.
// Setting the default one.
this.parseScale(kDefaultScale, 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;
},
search: function pdfViewStartSearch() {
// Limit this function to run every <SEARCH_TIMEOUT>ms.
var SEARCH_TIMEOUT = 250;
var lastSearch = this.lastSearch;
var now = Date.now();
if (lastSearch && (now - lastSearch) < SEARCH_TIMEOUT) {
if (!this.searchTimer) {
this.searchTimer = setTimeout(function resumeSearch() {
PDFView.search();
},
SEARCH_TIMEOUT - (now - lastSearch)
);
}
return;
}
this.searchTimer = null;
this.lastSearch = now;
function bindLink(link, pageNumber) {
link.href = '#' + pageNumber;
link.onclick = function searchBindLink() {
PDFView.page = pageNumber;
return false;
};
}
var searchResults = document.getElementById('searchResults');
var searchTermsInput = document.getElementById('searchTermsInput');
searchResults.removeAttribute('hidden');
searchResults.textContent = '';
var terms = searchTermsInput.value;
if (!terms)
return;
// simple search: removing spaces and hyphens, then scanning every
terms = terms.replace(/\s-/g, '').toLowerCase();
var index = PDFView.pageText;
var pageFound = false;
for (var i = 0, ii = index.length; i < ii; i++) {
var pageText = index[i].replace(/\s-/g, '').toLowerCase();
var j = pageText.indexOf(terms);
if (j < 0)
continue;
var pageNumber = i + 1;
var textSample = index[i].substr(j, 50);
var link = document.createElement('a');
bindLink(link, pageNumber);
link.textContent = 'Page ' + pageNumber + ': ' + textSample;
searchResults.appendChild(link);
pageFound = true;
}
if (!pageFound) {
searchResults.textContent = '';
var noResults = document.createElement('div');
noResults.classList.add('noResults');
noResults.textContent = mozL10n.get('search_terms_not_found', null,
'(Not found)');
searchResults.appendChild(noResults);
}
},
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 searchView = document.getElementById('searchView');
var thumbsButton = document.getElementById('viewThumbnail');
var outlineButton = document.getElementById('viewOutline');
var searchButton = document.getElementById('viewSearch');
switch (view) {
case 'thumbs':
thumbsButton.classList.add('toggled');
outlineButton.classList.remove('toggled');
searchButton.classList.remove('toggled');
thumbsView.classList.remove('hidden');
outlineView.classList.add('hidden');
searchView.classList.add('hidden');
PDFView.renderHighestPriority();
break;
case 'outline':
thumbsButton.classList.remove('toggled');
outlineButton.classList.add('toggled');
searchButton.classList.remove('toggled');
thumbsView.classList.add('hidden');
outlineView.classList.remove('hidden');
searchView.classList.add('hidden');
if (outlineButton.getAttribute('disabled'))
return;
break;
case 'search':
thumbsButton.classList.remove('toggled');
outlineButton.classList.remove('toggled');
searchButton.classList.add('toggled');
thumbsView.classList.add('hidden');
outlineView.classList.add('hidden');
searchView.classList.remove('hidden');
var searchTermsInput = document.getElementById('searchTermsInput');
searchTermsInput.focus();
// Start text extraction as soon as the search gets displayed.
this.extractText();
break;
}
},
extractText: function() {
if (this.startedTextExtraction)
return;
this.startedTextExtraction = true;
var self = this;
function extractPageText(pageIndex) {
self.pages[pageIndex].pdfPage.getTextContent().then(
function textContentResolved(textContent) {
self.pageText[pageIndex] = textContent;
self.search();
if ((pageIndex + 1) < self.pages.length)
extractPageText(pageIndex + 1);
}
);
}
extractPageText(0);
},
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.fullscreen || 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);
return true;
},
exitFullscreen: function pdfViewExitFullscreen() {
this.isFullscreen = false;
this.parseScale(this.previousScale);
this.page = this.page;
},
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);
}
};
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;
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 = this.viewport.width + 'px';
div.style.height = 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 = viewport.width + 'px';
div.style.height = 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) {
var 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 createCommentAnnotation(type, item) {
var container = document.createElement('section');
container.className = 'annotComment';
var image = createElementWithStyle('img', item);
var type = item.type;
var rect = viewport.convertToViewportRectangle(item.rect);
rect = PDFJS.Util.normalizeRect(rect);
image.src = kImageDirectory + 'annotation-' + type.toLowerCase() + '.svg';
image.alt = mozL10n.get('text_annotation_type', {type: type},
'[{{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('\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 comment = createCommentAnnotation(item.name, item);
if (comment)
div.appendChild(comment);
break;
case 'Widget':
// TODO: support forms
PDFView.fallback();
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 - kScrollbarPadding) /
width / kCssUnits;
heightScale = (this.container.clientHeight - kScrollbarPadding) /
height / kCssUnits;
scale = Math.min(widthScale, heightScale);
break;
default:
return;
}
if (scale && scale !== PDFView.currentScale)
PDFView.parseScale(scale, true, true);
else if (PDFView.currentScale === kUnknownScale)
PDFView.parseScale(kDefaultScale, 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.draw = function pageviewDraw(callback) {
if (this.renderingState !== RenderingStates.INITIAL)
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 textLayer = textLayerDiv ? new TextLayerBuilder(textLayerDiv) : null;
var scale = this.scale, viewport = this.viewport;
canvas.width = viewport.width;
canvas.height = viewport.height;
var ctx = canvas.getContext('2d');
ctx.save();
ctx.fillStyle = 'rgb(255, 255, 255)';
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.restore();
// Rendering area
var self = this;
function pageViewDrawCallback(error) {
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,
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();
}
};
this.pdfPage.render(renderContext).then(
function pdfPageRenderCallback() {
pageViewDrawCallback(null);
},
function pdfPageRenderError(error) {
pageViewDrawCallback(error);
}
);
setupAnnotations(this.pdfPage, this.viewport);
div.setAttribute('data-loaded', true);
};
this.beforePrint = function pageViewBeforePrint() {
var pdfPage = this.pdfPage;
var viewport = pdfPage.getViewport(1);
var canvas = this.canvas = document.createElement('canvas');
canvas.width = viewport.width;
canvas.height = viewport.height;
canvas.style.width = viewport.width + 'pt';
canvas.style.height = viewport.height + 'pt';
var printContainer = document.getElementById('printContainer');
printContainer.appendChild(canvas);
var self = this;
canvas.mozPrintCallback = function(obj) {
var ctx = obj.context;
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 object)
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';
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)
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) {
this.textLayerDiv = textLayerDiv;
this.beginLayout = function textLayerBuilderBeginLayout() {
this.textDivs = [];
this.textLayerQueue = [];
};
this.endLayout = function textLayerBuilderEndLayout() {
var self = this;
var textDivs = this.textDivs;
var textLayerDiv = this.textLayerDiv;
var renderTimer = null;
var renderingDone = false;
var renderInterval = 0;
var resumeInterval = 500; // in ms
var canvas = document.createElement('canvas');
var ctx = canvas.getContext('2d');
// Render the text layer, one div at a time
function renderTextLayer() {
if (textDivs.length === 0) {
clearInterval(renderTimer);
renderingDone = true;
self.textLayerDiv = textLayerDiv = canvas = ctx = null;
return;
}
var textDiv = textDivs.shift();
textLayerDiv.appendChild(textDiv);
ctx.font = textDiv.style.fontSize + ' sans-serif';
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%');
}
}
renderTimer = setInterval(renderTextLayer, renderInterval);
// Stop rendering when user scrolls. Resume after XXX milliseconds
// of no scroll events
var scrollTimer = null;
function textLayerOnScroll() {
if (renderingDone) {
window.removeEventListener('scroll', textLayerOnScroll, false);
return;
}
// Immediately pause rendering
clearInterval(renderTimer);
clearTimeout(scrollTimer);
scrollTimer = setTimeout(function textLayerScrollTimer() {
// Resume rendering
renderTimer = setInterval(renderTextLayer, renderInterval);
}, resumeInterval);
} // textLayerOnScroll
window.addEventListener('scroll', textLayerOnScroll, false);
}; // endLayout
this.appendText = function textLayerBuilderAppendText(text,
fontName, fontSize) {
var textDiv = document.createElement('div');
// vScale and hScale already contain the scaling to pixel units
var fontHeight = fontSize * text.geom.vScale;
textDiv.dataset.canvasWidth = text.canvasWidth * text.geom.hScale;
textDiv.dataset.fontName = fontName;
textDiv.style.fontSize = fontHeight + 'px';
textDiv.style.left = text.geom.x + 'px';
textDiv.style.top = (text.geom.y - fontHeight) + 'px';
textDiv.textContent = PDFJS.bidi(text, -1);
textDiv.dir = text.direction;
this.textDivs.push(textDiv);
};
};
document.addEventListener('DOMContentLoaded', function webViewerLoad(evt) {
PDFView.initialize();
var params = PDFView.parseQueryString(document.location.search.substring(1));
//#if !(FIREFOX || MOZCENTRAL)
var file = params.file || kDefaultURL;
//#else
//var file = window.location.toString()
//#endif
//#if !(FIREFOX || MOZCENTRAL)
if (!window.File || !window.FileReader || !window.FileList || !window.Blob) {
document.getElementById('openFile').setAttribute('hidden', 'true');
} else {
document.getElementById('fileInput').value = null;
}
//#else
//document.getElementById('openFile').setAttribute('hidden', 'true');
//#endif
// 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 !(FIREFOX || MOZCENTRAL)
var locale = navigator.language;
if ('locale' in hashParams)
locale = hashParams['locale'];
mozL10n.language.code = locale;
//#endif
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 !(FIREFOX || MOZCENTRAL)
if ('pdfBug' in hashParams) {
//#else
//if ('pdfBug' in hashParams && FirefoxCom.requestSync('pdfBugEnabled')) {
//#endif
PDFJS.pdfBug = true;
var pdfBug = hashParams['pdfBug'];
var enabled = pdfBug.split(',');
PDFBug.enable(enabled);
PDFBug.init();
}
//#if !(FIREFOX || MOZCENTRAL)
//#else
//if (FirefoxCom.requestSync('searchEnabled')) {
// document.querySelector('#viewSearch').classList.remove('hidden');
//}
//#endif
if (!PDFView.supportsPrinting) {
document.getElementById('print').classList.add('hidden');
}
if (!PDFView.supportsFullscreen) {
document.getElementById('fullscreen').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('viewSearch').addEventListener('click',
function() {
PDFView.switchSidebarView('search');
});
document.getElementById('searchButton').addEventListener('click',
function() {
PDFView.search();
});
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('searchTermsInput').addEventListener('keydown',
function(event) {
if (event.keyCode == 13) {
PDFView.search();
}
});
document.getElementById('pageNumber').addEventListener('change',
function() {
PDFView.page = this.value;
});
document.getElementById('scaleSelect').addEventListener('change',
function() {
PDFView.parseScale(this.value);
});
document.getElementById('page_rotate_ccw').addEventListener('click',
function() {
PDFView.rotatePages(-90);
});
document.getElementById('page_rotate_cw').addEventListener('click',
function() {
PDFView.rotatePages(90);
});
//#if (FIREFOX || MOZCENTRAL)
//if (FirefoxCom.requestSync('getLoadingType') == 'passive') {
// PDFView.setTitleUsingUrl(file);
// PDFView.initPassiveLoading();
// return;
//}
//#endif
//#if !B2G
PDFView.open(file, 0);
//#endif
}, true);
function updateViewarea() {
if (!PDFView.initialized)
return;
var visible = PDFView.getVisiblePages();
var visiblePages = visible.views;
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.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;
}
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.language.direction;
}, 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;
}
updateViewarea();
}, true);
window.addEventListener('pagechange', function pagechange(evt) {
var page = evt.pageNumber;
if (document.getElementById('pageNumber').value != 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]();
}
}, 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 61: // FF/Mac '='
case 107: // FF '+' and '='
case 187: // Chrome '+'
PDFView.zoomIn();
handled = true;
break;
case 173: // FF/Mac '-'
case 109: // FF '-'
case 189: // Chrome '-'
PDFView.zoomOut();
handled = true;
break;
case 48: // '0'
PDFView.parseScale(kDefaultScale, true);
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')
return;
var controlsElement = document.getElementById('controls');
while (curElement) {
if (curElement === controlsElement && !PDFView.isFullscreen)
return; // ignoring if the 'controls' element is focused
curElement = curElement.parentNode;
}
if (cmd == 0) { // no control key pressed at all.
switch (evt.keyCode) {
case 37: // left arrow
case 75: // 'k'
case 80: // 'p'
PDFView.page--;
handled = true;
break;
case 39: // right arrow
case 74: // 'j'
case 78: // 'n'
PDFView.page++;
handled = true;
break;
case 32: // spacebar
if (PDFView.isFullscreen) {
PDFView.page++;
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();
}
});
window.addEventListener('beforeprint', function beforePrint(evt) {
PDFView.beforePrint();
});
window.addEventListener('afterprint', function afterPrint(evt) {
PDFView.afterPrint();
});
(function fullscreenClosure() {
function fullscreenChange(e) {
var isFullscreen = document.fullscreen || document.mozFullScreen ||
document.webkitIsFullScreen;
if (!isFullscreen) {
PDFView.exitFullscreen();
}
}
window.addEventListener('fullscreenchange', fullscreenChange, false);
window.addEventListener('mozfullscreenchange', fullscreenChange, false);
window.addEventListener('webkitfullscreenchange', fullscreenChange, false);
})();
//#if B2G
//window.navigator.mozSetMessageHandler('activity', function(activity) {
// var url = activity.source.data.url;
// // Temporarily get the data here since the cross domain xhr is broken in
// // the worker currently, see bug 761227.
// var params = {
// url: url,
// error: function(e) {
// PDFView.error(mozL10n.get('loading_error', null,
// 'An error occurred while loading the PDF.'), e);
// }
// };
// PDFJS.getPdf(params, function successCallback(data) {
// PDFView.open(data, 0);
// });
//});
//#endif