763 lines
23 KiB
JavaScript
763 lines
23 KiB
JavaScript
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
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/* FROM PDF.JS, ADAPTED */
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'use strict';
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var kDefaultURL = 'compressed.tracemonkey-pldi-09.pdf';
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var kDefaultScale = 1.25;
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var kDefaultScaleDelta = 1.1;
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var kCacheSize = 20;
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var kCssUnits = 96.0 / 72.0;
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var kScrollbarPadding = 40;
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var kMinScale = 0.25;
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var kMaxScale = 4.0;
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var Cache = function cacheCache(size) {
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var data = [];
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this.push = function cachePush(view) {
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var i = data.indexOf(view);
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if (i >= 0)
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data.splice(i);
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data.push(view);
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if (data.length > size)
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data.shift().update();
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};
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};
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var cache = new Cache(kCacheSize);
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var currentPageNumber = 1;
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var PDFView = {
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active: false,
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pages: [],
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thumbnails: [],
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currentScale: kDefaultScale,
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initialBookmark: document.location.hash.substring(1),
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setScale: function pdfViewSetScale(val, resetAutoSettings) {
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var pages = this.pages;
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for (var i = 0; i < pages.length; i++)
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pages[i].update(val * kCssUnits);
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if (this.currentScale != val)
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this.pages[this.page - 1].scrollIntoView();
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this.currentScale = val;
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var event = document.createEvent('UIEvents');
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event.initUIEvent('scalechange', false, false, window, 0);
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event.scale = val;
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event.resetAutoSettings = resetAutoSettings;
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window.dispatchEvent(event);
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},
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parseScale: function pdfViewParseScale(value, resetAutoSettings) {
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if ('custom' == value)
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return;
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var scale = parseFloat(value);
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if (scale) {
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this.setScale(scale, true);
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return;
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}
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var currentPage = this.pages[this.page - 1];
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var pageWidthScale = ($("#content").width() - kScrollbarPadding) /
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currentPage.width / kCssUnits;
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var pageHeightScale = ($("#content").height() - kScrollbarPadding) /
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currentPage.height / kCssUnits;
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if ('page-width' == value)
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this.setScale(pageWidthScale, resetAutoSettings);
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if ('page-height' == value)
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this.setScale(pageHeightScale, resetAutoSettings);
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if ('page-fit' == value) {
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this.setScale(
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Math.min(pageWidthScale, pageHeightScale), resetAutoSettings);
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}
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},
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zoomIn: function pdfViewZoomIn() {
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var newScale = Math.min(kMaxScale, this.currentScale * kDefaultScaleDelta);
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this.setScale(newScale, true);
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},
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zoomOut: function pdfViewZoomOut() {
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var newScale = Math.max(kMinScale, this.currentScale / kDefaultScaleDelta);
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this.setScale(newScale, true);
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},
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set page(val) {
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var pages = this.pages;
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var input = document.getElementById('pageNumber');
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if (!(0 < val && val <= pages.length)) {
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var event = document.createEvent('UIEvents');
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event.initUIEvent('pagechange', false, false, window, 0);
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event.pageNumber = this.page;
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window.dispatchEvent(event);
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return;
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}
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currentPageNumber = val;
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var event = document.createEvent('UIEvents');
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event.initUIEvent('pagechange', false, false, window, 0);
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event.pageNumber = val;
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window.dispatchEvent(event);
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// checking if the this.page was called from the updateViewarea function:
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// avoiding the creation of two "set page" method (internal and public)
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if (updateViewarea.inProgress)
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return;
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// Avoid scrolling the first page during loading
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if (this.loading && val == 1)
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return;
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pages[val - 1].scrollIntoView();
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},
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get page() {
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return currentPageNumber;
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},
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open: function pdfViewOpen(url, scale) {
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document.title = PDFView.Ptitle;
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this.url = url;
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var self = this;
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PDFJS.getPdf(
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{
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url: url,
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progress: function getPdfProgress(evt) {
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if (evt.lengthComputable)
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self.progress(evt.loaded / evt.total);
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},
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error: self.error
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},
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function getPdfLoad(data) {
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self.loading = true;
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self.load(data, scale);
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self.loading = false;
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});
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},
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download: function pdfViewDownload() {
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window.open(this.url + '#pdfjs.action=download', '_parent');
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},
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navigateTo: function pdfViewNavigateTo(dest) {
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if (typeof dest === 'string')
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if(!this.destinations || ! this.destinations[dest]){
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return; // invalid destination
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}
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dest = this.destinations[dest];
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if (!(dest instanceof Array))
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return; // invalid destination
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// dest array looks like that: <page-ref> </XYZ|FitXXX> <args..>
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var destRef = dest[0];
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var pageNumber = destRef instanceof Object ?
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this.pagesRefMap[destRef.num + ' ' + destRef.gen + ' R'] : (destRef + 1);
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if (pageNumber) {
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this.page = pageNumber;
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var currentPage = this.pages[pageNumber - 1];
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currentPage.scrollIntoView(dest);
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}
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},
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getDestinationHash: function pdfViewGetDestinationHash(dest) {
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if (typeof dest === 'string')
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return '#' + escape(dest);
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if (dest instanceof Array) {
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var destRef = dest[0]; // see navigateTo method for dest format
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var pageNumber = destRef instanceof Object ?
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this.pagesRefMap[destRef.num + ' ' + destRef.gen + ' R'] :
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(destRef + 1);
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if (pageNumber) {
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var pdfOpenParams = '#page=' + pageNumber;
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if (isName(dest[1], 'XYZ')) {
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var scale = (dest[4] || this.currentScale);
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pdfOpenParams += '&zoom=' + (scale * 100);
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if (dest[2] || dest[3]) {
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pdfOpenParams += ',' + (dest[2] || 0) + ',' + (dest[3] || 0);
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}
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}
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return pdfOpenParams;
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}
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}
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return '';
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},
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error: function pdfViewError() {
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var loadingIndicator = document.getElementById('loading');
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loadingIndicator.innerHTML = 'Error';
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},
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progress: function pdfViewProgress(level) {
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var percent = Math.round(level * 100);
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var loadingIndicator = document.getElementById('loading');
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loadingIndicator.innerHTML = 'Loading... ' + percent + '%';
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},
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load: function pdfViewLoad(data, scale) {
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var loadingIndicator = document.getElementById('loading');
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loadingIndicator.setAttribute('hidden', 'true');
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var container = document.getElementById('viewer');
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while (container.hasChildNodes())
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container.removeChild(container.lastChild);
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var pdf = new PDFJS.PDFDoc(data);
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var pagesCount = pdf.numPages;
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document.getElementById('numPages').innerHTML = pagesCount;
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document.getElementById('pageNumber').max = pagesCount;
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var pages = this.pages = [];
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var pagesRefMap = {};
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var thumbnails = this.thumbnails = [];
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for (var i = 1; i <= pagesCount; i++) {
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var page = pdf.getPage(i);
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pages.push(new PageView(container, page, i, page.width, page.height,
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page.stats, this.navigateTo.bind(this)));
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/*thumbnails.push(new ThumbnailView(sidebar, page, i,
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page.width / page.height));*/
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var pageRef = page.ref;
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pagesRefMap[pageRef.num + ' ' + pageRef.gen + ' R'] = i;
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}
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this.setScale(scale || kDefaultScale, true);
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/*this.pagesRefMap = pagesRefMap;
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this.destinations = pdf.catalog.destinations;
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if (pdf.catalog.documentOutline) {
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this.outline = new DocumentOutlineView(pdf.catalog.documentOutline);
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var outlineSwitchButton = document.getElementById('outlineSwitch');
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outlineSwitchButton.removeAttribute('disabled');
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this.switchSidebarView('outline');
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}*/
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this.page = 1;
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/*if (this.initialBookmark) {
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this.setHash(this.initialBookmark);
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this.initialBookmark = null;
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}
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else
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this.page = 1;*/
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},
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setHash: function pdfViewSetHash(hash) {
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if (!hash)
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return;
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if (hash.indexOf('=') >= 0) {
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// parsing query string
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var paramsPairs = hash.split('&');
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var params = {};
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for (var i = 0; i < paramsPairs.length; ++i) {
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var paramPair = paramsPairs[i].split('=');
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params[paramPair[0]] = paramPair[1];
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}
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// borrowing syntax from "Parameters for Opening PDF Files"
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if ('nameddest' in params) {
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PDFView.navigateTo(params.nameddest);
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return;
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}
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if ('page' in params) {
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var pageNumber = (params.page | 0) || 1;
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this.page = pageNumber;
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if ('zoom' in params) {
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var zoomArgs = params.zoom.split(','); // scale,left,top
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// building destination array
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var dest = [null, new Name('XYZ'), (zoomArgs[1] | 0),
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(zoomArgs[2] | 0), (zoomArgs[0] | 0) / 100];
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var currentPage = this.pages[pageNumber - 1];
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currentPage.scrollIntoView(dest);
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} else
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this.page = params.page; // simple page
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return;
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}
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} else if (/^\d+$/.test(hash)) // page number
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this.page = hash;
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else // named destination
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PDFView.navigateTo(unescape(hash));
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},
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/*switchSidebarView: function pdfViewSwitchSidebarView(view) {
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var thumbsScrollView = document.getElementById('sidebarScrollView');
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var outlineScrollView = document.getElementById('outlineScrollView');
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var thumbsSwitchButton = document.getElementById('thumbsSwitch');
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var outlineSwitchButton = document.getElementById('outlineSwitch');
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switch (view) {
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case 'thumbs':
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thumbsScrollView.removeAttribute('hidden');
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outlineScrollView.setAttribute('hidden', 'true');
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thumbsSwitchButton.setAttribute('data-selected', true);
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outlineSwitchButton.removeAttribute('data-selected');
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break;
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case 'outline':
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thumbsScrollView.setAttribute('hidden', 'true');
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outlineScrollView.removeAttribute('hidden');
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thumbsSwitchButton.removeAttribute('data-selected');
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outlineSwitchButton.setAttribute('data-selected', true);
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break;
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}
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},*/
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getVisiblePages: function pdfViewGetVisiblePages() {
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var pages = this.pages;
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var kBottomMargin = 10;
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var visiblePages = [];
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var currentHeight = kBottomMargin;
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var windowTop = window.pageYOffset;
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for (var i = 1; i <= pages.length; ++i) {
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var page = pages[i - 1];
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var pageHeight = page.height * page.scale + kBottomMargin;
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if (currentHeight + pageHeight > windowTop)
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break;
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currentHeight += pageHeight;
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}
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var windowBottom = window.pageYOffset + window.innerHeight;
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for (; i <= pages.length && currentHeight < windowBottom; ++i) {
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var singlePage = pages[i - 1];
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visiblePages.push({ id: singlePage.id, y: currentHeight,
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view: singlePage });
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currentHeight += singlePage.height * singlePage.scale + kBottomMargin;
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}
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return visiblePages;
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}
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};
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var PageView = function pageView(container, content, id, pageWidth, pageHeight,
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stats, navigateTo) {
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this.id = id;
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this.content = content;
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var view = this.content.view;
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this.x = view.x;
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this.y = view.y;
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this.width = view.width;
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this.height = view.height;
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var anchor = document.createElement('a');
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anchor.name = '' + this.id;
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var div = document.createElement('div');
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div.id = 'pageContainer' + this.id;
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div.className = 'page';
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container.appendChild(anchor);
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container.appendChild(div);
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this.update = function pageViewUpdate(scale) {
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this.scale = scale || this.scale;
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div.style.width = (this.width * this.scale) + 'px';
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div.style.height = (this.height * this.scale) + 'px';
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var container = document.getElementById('viewer');
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container.style.left = (document.getElementById("content").offsetWidth-(this.width))/2 + 'px';
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while (div.hasChildNodes())
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div.removeChild(div.lastChild);
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div.removeAttribute('data-loaded');
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};
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function setupLinks(content, scale) {
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function bindLink(link, dest) {
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link.href = PDFView.getDestinationHash(dest);
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link.onclick = function pageViewSetupLinksOnclick() {
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if (dest)
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PDFView.navigateTo(dest);
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return false;
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};
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}
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var links = content.getLinks();
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for (var i = 0; i < links.length; i++) {
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var link = document.createElement('a');
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link.style.left = (Math.floor(links[i].x - view.x) * scale) + 'px';
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link.style.top = (Math.floor(links[i].y - view.y) * scale) + 'px';
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link.style.width = Math.ceil(links[i].width * scale) + 'px';
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link.style.height = Math.ceil(links[i].height * scale) + 'px';
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link.href = links[i].url || '';
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if (!links[i].url)
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bindLink(link, ('dest' in links[i]) ? links[i].dest : null);
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div.appendChild(link);
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}
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}
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this.getPagePoint = function pageViewGetPagePoint(x, y) {
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var scale = PDFView.currentScale;
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return this.content.rotatePoint(x / scale, y / scale);
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};
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this.scrollIntoView = function pageViewScrollIntoView(dest) {
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if (!dest) {
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div.scrollIntoView(true);
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return;
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}
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var x = 0, y = 0;
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var width = 0, height = 0, widthScale, heightScale;
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var scale = 0;
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switch (dest[1].name) {
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case 'XYZ':
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x = dest[2];
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y = dest[3];
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scale = dest[4];
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break;
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case 'Fit':
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case 'FitB':
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scale = 'page-fit';
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break;
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case 'FitH':
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case 'FitBH':
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y = dest[2];
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scale = 'page-width';
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break;
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case 'FitV':
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case 'FitBV':
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x = dest[2];
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scale = 'page-height';
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break;
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case 'FitR':
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x = dest[2];
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y = dest[3];
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width = dest[4] - x;
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height = dest[5] - y;
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widthScale = (window.innerWidth - kScrollbarPadding) /
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width / kCssUnits;
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heightScale = (window.innerHeight - kScrollbarPadding) /
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height / kCssUnits;
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scale = Math.min(widthScale, heightScale);
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break;
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default:
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return;
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}
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var boundingRect = [
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this.content.rotatePoint(x, y),
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this.content.rotatePoint(x + width, y + height)
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];
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if (scale && scale !== PDFView.currentScale)
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PDFView.setScale(scale, true);
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setTimeout(function pageViewScrollIntoViewRelayout() {
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// letting page to re-layout before scrolling
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var scale = PDFView.currentScale;
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var x = Math.min(boundingRect[0].x, boundingRect[1].x);
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var y = Math.min(boundingRect[0].y, boundingRect[1].y);
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var width = Math.abs(boundingRect[0].x - boundingRect[1].x);
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var height = Math.abs(boundingRect[0].y - boundingRect[1].y);
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// using temporary div to scroll it into view
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var tempDiv = document.createElement('div');
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tempDiv.style.position = 'absolute';
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tempDiv.style.left = Math.floor(x * scale) + 'px';
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tempDiv.style.top = Math.floor(y * scale) + 'px';
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tempDiv.style.width = Math.ceil(width * scale) + 'px';
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tempDiv.style.height = Math.ceil(height * scale) + 'px';
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div.appendChild(tempDiv);
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tempDiv.scrollIntoView(true);
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div.removeChild(tempDiv);
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}, 0);
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};
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this.draw = function pageviewDraw() {
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if (div.hasChildNodes()) {
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this.updateStats();
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return false;
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}
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var canvas = document.createElement('canvas');
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canvas.id = 'page' + this.id;
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canvas.mozOpaque = true;
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div.appendChild(canvas);
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var scale = this.scale;
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canvas.width = pageWidth * scale;
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canvas.height = pageHeight * scale;
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var ctx = canvas.getContext('2d');
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ctx.save();
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ctx.fillStyle = 'rgb(255, 255, 255)';
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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ctx.restore();
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ctx.translate(-this.x * scale, -this.y * scale);
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stats.begin = Date.now();
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this.content.startRendering(ctx, this.updateStats);
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setupLinks(this.content, this.scale);
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div.setAttribute('data-loaded', true);
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return true;
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};
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this.updateStats = function pageViewUpdateStats() {
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var t1 = stats.compile, t2 = stats.fonts, t3 = stats.render;
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var str = 'Time to compile/fonts/render: ' +
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(t1 - stats.begin) + '/' + (t2 - t1) + '/' + (t3 - t2) + ' ms';
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};
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};
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var ThumbnailView = function thumbnailView(container, page, id, pageRatio) {
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var anchor = document.createElement('a');
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anchor.href = '#' + id;
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anchor.onclick = function stopNivigation() {
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PDFView.page = id;
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return false;
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};
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var div = document.createElement('div');
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div.id = 'thumbnailContainer' + id;
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div.className = 'thumbnail';
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anchor.appendChild(div);
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container.appendChild(anchor);
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this.draw = function thumbnailViewDraw() {
|
|
if (div.hasChildNodes())
|
|
return;
|
|
|
|
var canvas = document.createElement('canvas');
|
|
canvas.id = 'thumbnail' + id;
|
|
canvas.mozOpaque = true;
|
|
|
|
var maxThumbSize = 134;
|
|
canvas.width = pageRatio >= 1 ? maxThumbSize :
|
|
maxThumbSize * pageRatio;
|
|
canvas.height = pageRatio <= 1 ? maxThumbSize :
|
|
maxThumbSize / pageRatio;
|
|
|
|
div.setAttribute('data-loaded', true);
|
|
div.appendChild(canvas);
|
|
|
|
var ctx = canvas.getContext('2d');
|
|
ctx.save();
|
|
ctx.fillStyle = 'rgb(255, 255, 255)';
|
|
ctx.fillRect(0, 0, canvas.width, canvas.height);
|
|
ctx.restore();
|
|
|
|
var view = page.view;
|
|
var scaleX = (canvas.width / page.width);
|
|
var scaleY = (canvas.height / page.height);
|
|
ctx.translate(-view.x * scaleX, -view.y * scaleY);
|
|
div.style.width = (view.width * scaleX) + 'px';
|
|
div.style.height = (view.height * scaleY) + 'px';
|
|
div.style.lineHeight = (view.height * scaleY) + 'px';
|
|
|
|
page.startRendering(ctx, function thumbnailViewDrawStartRendering() {});
|
|
};
|
|
};
|
|
|
|
var DocumentOutlineView = function documentOutlineView(outline) {
|
|
var outlineView = document.getElementById('outlineView');
|
|
|
|
function bindItemLink(domObj, item) {
|
|
domObj.href = PDFView.getDestinationHash(item.dest);
|
|
domObj.onclick = function documentOutlineViewOnclick(e) {
|
|
PDFView.navigateTo(item.dest);
|
|
return false;
|
|
};
|
|
}
|
|
|
|
var queue = [{parent: outlineView, items: outline}];
|
|
while (queue.length > 0) {
|
|
var levelData = queue.shift();
|
|
var i, n = levelData.items.length;
|
|
for (i = 0; i < n; i++) {
|
|
var item = levelData.items[i];
|
|
var div = document.createElement('div');
|
|
div.className = 'outlineItem';
|
|
var a = document.createElement('a');
|
|
bindItemLink(a, item);
|
|
a.textContent = item.title;
|
|
div.appendChild(a);
|
|
|
|
if (item.items.length > 0) {
|
|
var itemsDiv = document.createElement('div');
|
|
itemsDiv.className = 'outlineItems';
|
|
div.appendChild(itemsDiv);
|
|
queue.push({parent: itemsDiv, items: item.items});
|
|
}
|
|
|
|
levelData.parent.appendChild(div);
|
|
}
|
|
}
|
|
};
|
|
|
|
function webViewerLoad(url) {
|
|
var scale = kDefaultScale;
|
|
PDFView.open(url, parseFloat(PDFView.parseScale(scale)));
|
|
|
|
if (!window.File || !window.FileReader || !window.FileList || !window.Blob)
|
|
document.getElementById('fileInput').setAttribute('hidden', 'true');
|
|
else
|
|
document.getElementById('fileInput').value = null;
|
|
}
|
|
|
|
window.addEventListener('unload', function webViewerUnload(evt) {
|
|
window.scrollTo(0, 0);
|
|
}, true);
|
|
|
|
function updateViewarea() {
|
|
var visiblePages = PDFView.getVisiblePages();
|
|
for (var i = 0; i < visiblePages.length; i++) {
|
|
var page = visiblePages[i];
|
|
if (PDFView.pages[page.id - 1].draw())
|
|
cache.push(page.view);
|
|
}
|
|
|
|
if (!visiblePages.length)
|
|
return;
|
|
|
|
updateViewarea.inProgress = true; // used in "set page"
|
|
var currentId = PDFView.page;
|
|
var firstPage = visiblePages[0];
|
|
PDFView.page = firstPage.id;
|
|
updateViewarea.inProgress = false;
|
|
|
|
var kViewerTopMargin = 52;
|
|
var pageNumber = firstPage.id;
|
|
var pdfOpenParams = '#page=' + pageNumber;
|
|
pdfOpenParams += '&zoom=' + Math.round(PDFView.currentScale * 100);
|
|
var currentPage = PDFView.pages[pageNumber - 1];
|
|
var topLeft = currentPage.getPagePoint(window.pageXOffset,
|
|
window.pageYOffset - firstPage.y - kViewerTopMargin);
|
|
pdfOpenParams += ',' + Math.round(topLeft.x) + ',' + Math.round(topLeft.y);
|
|
}
|
|
|
|
window.addEventListener('scroll', function webViewerScroll(evt) {
|
|
if(!PDFView.active){
|
|
return;
|
|
}
|
|
updateViewarea();
|
|
}, true);
|
|
|
|
window.addEventListener('resize', function webViewerResize(evt) {
|
|
if(!PDFView.active){
|
|
return;
|
|
}
|
|
if (document.getElementById('pageWidthOption').selected ||
|
|
document.getElementById('pageFitOption').selected)
|
|
PDFView.parseScale(document.getElementById('scaleSelect').value);
|
|
updateViewarea();
|
|
});
|
|
|
|
window.addEventListener('hashchange', function webViewerHashchange(evt) {
|
|
if(!PDFView.active){
|
|
return;
|
|
}
|
|
PDFView.setHash(document.location.hash.substring(1));
|
|
});
|
|
|
|
window.addEventListener('change', function webViewerChange(evt) {
|
|
if(!PDFView.active){
|
|
return;
|
|
}
|
|
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 data = evt.target.result;
|
|
var buffer = new ArrayBuffer(data.length);
|
|
var uint8Array = new Uint8Array(buffer);
|
|
|
|
for (var i = 0; i < data.length; i++)
|
|
uint8Array[i] = data.charCodeAt(i);
|
|
PDFView.load(uint8Array);
|
|
};
|
|
|
|
// Read as a binary string since "readAsArrayBuffer" is not yet
|
|
// implemented in Firefox.
|
|
var file = files[0];
|
|
fileReader.readAsBinaryString(file);
|
|
|
|
document.title = PDFView.Ptitle;
|
|
|
|
// URL does not reflect proper document location - hiding some icons.
|
|
document.getElementById('download').setAttribute('hidden', 'true');
|
|
}, true);
|
|
|
|
window.addEventListener('scalechange', function scalechange(evt) {
|
|
if(!PDFView.active){
|
|
return;
|
|
}
|
|
var customScaleOption = document.getElementById('customScaleOption');
|
|
customScaleOption.selected = false;
|
|
|
|
if (!evt.resetAutoSettings &&
|
|
(document.getElementById('pageWidthOption').selected ||
|
|
document.getElementById('pageFitOption').selected)) {
|
|
updateViewarea();
|
|
return;
|
|
}
|
|
|
|
var options = document.getElementById('scaleSelect').options;
|
|
var predefinedValueFound = false;
|
|
var value = '' + evt.scale;
|
|
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;
|
|
}
|
|
|
|
if (!predefinedValueFound) {
|
|
customScaleOption.textContent = Math.round(evt.scale * 10000) / 100 + '%';
|
|
customScaleOption.selected = true;
|
|
}
|
|
|
|
updateViewarea();
|
|
}, true);
|
|
|
|
window.addEventListener('pagechange', function pagechange(evt) {
|
|
if(!PDFView.active){
|
|
return;
|
|
}
|
|
var page = evt.pageNumber;
|
|
if (document.getElementById('pageNumber').value != page)
|
|
document.getElementById('pageNumber').value = page;
|
|
document.getElementById('previous').disabled = (page <= 1);
|
|
document.getElementById('next').disabled = (page >= PDFView.pages.length);
|
|
}, true);
|
|
|
|
window.addEventListener('keydown', function keydown(evt) {
|
|
if(!PDFView.active){
|
|
return;
|
|
}
|
|
var curElement = document.activeElement;
|
|
var controlsElement = document.getElementById('controls2');
|
|
while (curElement) {
|
|
if (curElement === controlsElement)
|
|
return; // ignoring if the 'controls' element is focused
|
|
curElement = curElement.parentNode;
|
|
}
|
|
switch (evt.keyCode) {
|
|
case 61: // FF/Mac '='
|
|
case 107: // FF '+' and '='
|
|
case 187: // Chrome '+'
|
|
PDFView.zoomIn();
|
|
break;
|
|
case 109: // FF '-'
|
|
case 189: // Chrome '-'
|
|
PDFView.zoomOut();
|
|
break;
|
|
case 48: // '0'
|
|
PDFView.setScale(kDefaultScale, true);
|
|
break;
|
|
}
|
|
});
|
|
|
|
|