98 lines
2.4 KiB
JavaScript
98 lines
2.4 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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'use strict';
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var WorkerPage = (function() {
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function constructor(workerPDF, page) {
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this.workerPDF = workerPDF;
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this.page = page;
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this.ref = page.ref;
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}
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constructor.prototype = {
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get width() {
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return this.page.width;
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},
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get height() {
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return this.page.height;
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},
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get stats() {
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return this.page.stats;
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},
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startRendering: function(ctx, callback, errback) {
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this.ctx = ctx;
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this.callback = callback;
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// TODO: Place the worker magic HERE.
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// this.page.startRendering(ctx, callback, errback);
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this.workerPDF.startRendering(this)
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},
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startRenderingFromPreCompilation: function(preCompilation, fonts, images) {
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var gfx = new CanvasGraphics(this.ctx);
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// TODO: Add proper handling for images loaded by the worker.
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var images = new ImagesLoader();
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this.page.startRenderingFromPreCompilation(gfx, preCompilation, fonts, images, this.callback);
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},
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getLinks: function() {
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return this.page.getLinks();
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}
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};
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return constructor;
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})();
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var WorkerPDFDoc = (function() {
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function constructor(data) {
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this.data = data;
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this.stream = new Stream(data);
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this.pdf = new PDFDoc(this.stream);
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this.catalog = this.pdf.catalog;
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this.pageCache = [];
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this.worker = new Worker("worker/boot.js");
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this.handler = new MessageHandler({
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"page": function(data) {
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var pageNum = data.pageNum;
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var page = this.pageCache[pageNum];
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page.startRenderingFromPreCompilation(data.preCompilation, data.fonts, data.images);
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}
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}, this.worker.postMessage, this);
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this.worker.onmessage = this.handler.onMessage;
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this.handler.send("doc", data);
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}
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constructor.prototype = {
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get numPages() {
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return this.pdf.numPages;
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},
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startRendering: function(page) {
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this.handler.send("page", page.page.pageNumber);
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},
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getPage: function(n) {
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if (this.pageCache[n]) {
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return this.pageCache[n];
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}
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var page = this.pdf.getPage(n);
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return this.pageCache[n] = new WorkerPage(this, page);
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}
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};
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return constructor;
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})();
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