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1/*
2 * This file is part of "What's The Point" <https://github.com/Pacien/WhatsThePoint>
3 * Copyright (C) 2014 Pacien TRAN-GIRARD
4 *
5 * "What's The Point" is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU Affero General Public License as
7 * published by the Free Software Foundation, either version 3 of the
8 * License, or (at your option) any later version.
9 *
10 * "What's The Point" is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Affero General Public License for more details.
14 *
15 * You should have received a copy of the GNU Affero General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19requirejs.config({
20 shim: {
21 "pdfjs": {
22 exports: "PDFJS",
23 },
24 },
25 paths: {
26 "pdfjs": "libs/pdfjs/pdf",
27 },
28});
29
30define(["pdfjs"], function (pdfjs) {
31
32 var pdf = {
33
34 init: function (settings) {
35 this.fileUrl = settings.data.file;
36 this.width = settings.dimension.width;
37 this.height = settings.dimension.height;
38
39 this.slides = [];
40
41 pdfjs.disableRange = true;
42 pdfjs.workerSrc = "point/libs/pdfjs/pdf.worker.js";
43 },
44
45 makeCanvas: function () {
46 var canvas = document.createElement("canvas");
47 canvas.width = pdf.width;
48 canvas.height = pdf.height;
49 return canvas;
50 },
51
52 clearOutline: function (context, slideWidth, slideHeight, offsetX, offsetY) {
53 context.clearRect(0, 0, offsetX, pdf.height);
54 context.clearRect(offsetX + slideWidth, 0, offsetX, pdf.height);
55 context.clearRect(0, 0, pdf.width, offsetY);
56 context.clearRect(0, offsetY + slideHeight, pdf.width, offsetY);
57 return context;
58 },
59
60 renderSlide: function (pdfDocument, slideIndex, callback) {
61 pdfDocument.getPage(slideIndex).then(function (pdfPage) {
62
63 var viewport = pdfPage.getViewport(1);
64 var slideWidth = viewport.width / 2;
65 var slideHeight = viewport.height;
66
67 var widthRatio = pdf.width / slideWidth;
68 var heightRatio = pdf.height / slideHeight;
69 var scale = Math.min(widthRatio, heightRatio);
70 slideWidth *= scale;
71 slideHeight *= scale;
72
73 var offsetX = (pdf.width - slideWidth) / 2;
74 var offsetY = (pdf.height - slideHeight) / 2;
75
76 var contentViewport = new pdfjs.PageViewport(pdfPage.view, scale, 0, offsetX, offsetY);
77 var notesViewport = new pdfjs.PageViewport(pdfPage.view, scale, 0, -slideWidth + offsetX, offsetY);
78
79 var contentCanvas = pdf.makeCanvas();
80 var contentContext = contentCanvas.getContext("2d");
81
82 var notesCanvas = pdf.makeCanvas();
83 var notesContext = notesCanvas.getContext("2d");
84
85 var contentRenderContext = {
86 canvasContext: contentContext,
87 viewport: contentViewport,
88 };
89
90 var notesRenderContext = {
91 canvasContext: notesContext,
92 viewport: notesViewport,
93 };
94
95 pdfPage.render(contentRenderContext).then(function () {
96 pdf.clearOutline(contentContext, slideWidth, slideHeight, offsetX, offsetY);
97
98 pdfPage.render(notesRenderContext).then(function () {
99 pdf.clearOutline(notesContext, slideWidth, slideHeight, offsetX, offsetY);
100
101 pdf.registerSlide(contentCanvas, notesCanvas, pdfDocument, slideIndex, callback);
102
103 });
104 });
105 });
106 },
107
108 registerSlide: function (contentCanvas, notesCanvas, pdfDocument, slideIndex, callback) {
109 pdf.slides[slideIndex - 1] = {
110 content: contentCanvas,
111 notes: notesCanvas,
112 };
113
114 if (slideIndex < pdfDocument.pdfInfo.numPages) {
115 pdf.renderSlide(pdfDocument, slideIndex + 1, callback);
116 } else {
117 callback(pdf.slides);
118 }
119 },
120
121 parse: function (rawData, callback) {
122 pdfjs.getDocument(require.toUrl(this.fileUrl)).then(function (pdfDocument) {
123 pdf.renderSlide(pdfDocument, 1, callback);
124 });
125 },
126 };
127
128 return pdf;
129
130});