From e7bf5952d0729b37e677168b6e8fbd1ce58ed1a2 Mon Sep 17 00:00:00 2001
From: Pacien TRAN-GIRARD
Date: Sun, 10 Aug 2014 17:28:37 +0200
Subject: First version

---
 point/data/pdf.js | 130 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 point/data/pdf.js

(limited to 'point/data/pdf.js')

diff --git a/point/data/pdf.js b/point/data/pdf.js
new file mode 100644
index 0000000..f789bdf
--- /dev/null
+++ b/point/data/pdf.js
@@ -0,0 +1,130 @@
+/*
+ *	This file is part of "What's The Point" <https://github.com/Pacien/WhatsThePoint>
+ *	Copyright (C) 2014  Pacien TRAN-GIRARD
+ *
+ *	"What's The Point" is free software: you can redistribute it and/or modify
+ *	it under the terms of the GNU Affero General Public License as
+ *	published by the Free Software Foundation, either version 3 of the
+ *	License, or (at your option) any later version.
+ *
+ *	"What's The Point" is distributed in the hope that it will be useful,
+ *	but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *	GNU Affero General Public License for more details.
+ *
+ *	You should have received a copy of the GNU Affero General Public License
+ *	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+requirejs.config({
+	shim: {
+		"pdfjs": {
+			exports: "PDFJS",
+		},
+	},
+	paths: {
+		"pdfjs": "libs/pdfjs/pdf",
+	},
+});
+
+define(["pdfjs"], function (pdfjs) {
+
+	var pdf = {
+
+		init: function (settings) {
+			this.fileUrl = settings.data.file;
+			this.width = settings.dimension.width;
+			this.height = settings.dimension.height;
+
+			this.slides = [];
+
+			pdfjs.disableRange = true;
+			pdfjs.workerSrc = "point/libs/pdfjs/pdf.worker.js";
+		},
+
+		makeCanvas: function () {
+			var canvas = document.createElement("canvas");
+			canvas.width = pdf.width;
+			canvas.height = pdf.height;
+			return canvas;
+		},
+
+		clearOutline: function (context, slideWidth, slideHeight, offsetX, offsetY) {
+			context.clearRect(0, 0, offsetX, pdf.height);
+			context.clearRect(offsetX + slideWidth, 0, offsetX, pdf.height);
+			context.clearRect(0, 0, pdf.width, offsetY);
+			context.clearRect(0, offsetY + slideHeight, pdf.width, offsetY);
+			return context;
+		},
+
+		renderSlide: function (pdfDocument, slideIndex, callback) {
+			pdfDocument.getPage(slideIndex).then(function (pdfPage) {
+
+				var viewport = pdfPage.getViewport(1);
+				var slideWidth = viewport.width / 2;
+				var slideHeight = viewport.height;
+
+				var widthRatio = pdf.width / slideWidth;
+				var heightRatio = pdf.height / slideHeight;
+				var scale = Math.min(widthRatio, heightRatio);
+				slideWidth *= scale;
+				slideHeight *= scale;
+
+				var offsetX = (pdf.width - slideWidth) / 2;
+				var offsetY = (pdf.height - slideHeight) / 2;
+
+				var contentViewport = new pdfjs.PageViewport(pdfPage.view, scale, 0, offsetX, offsetY);
+				var notesViewport = new pdfjs.PageViewport(pdfPage.view, scale, 0, -slideWidth + offsetX, offsetY);
+
+				var contentCanvas = pdf.makeCanvas();
+				var contentContext = contentCanvas.getContext("2d");
+
+				var notesCanvas = pdf.makeCanvas();
+				var notesContext = notesCanvas.getContext("2d");
+
+				var contentRenderContext = {
+					canvasContext: contentContext,
+					viewport: contentViewport,
+				};
+
+				var notesRenderContext = {
+					canvasContext: notesContext,
+					viewport: notesViewport,
+				};
+
+				pdfPage.render(contentRenderContext).then(function () {
+					pdf.clearOutline(contentContext, slideWidth, slideHeight, offsetX, offsetY);
+
+					pdfPage.render(notesRenderContext).then(function () {
+						pdf.clearOutline(notesContext, slideWidth, slideHeight, offsetX, offsetY);
+
+						pdf.registerSlide(contentCanvas, notesCanvas, pdfDocument, slideIndex, callback);
+
+					});
+				});
+			});
+		},
+
+		registerSlide: function (contentCanvas, notesCanvas, pdfDocument, slideIndex, callback) {
+			pdf.slides[slideIndex - 1] = {
+				content: contentCanvas,
+				notes: notesCanvas,
+			};
+
+			if (slideIndex < pdfDocument.pdfInfo.numPages) {
+				pdf.renderSlide(pdfDocument, slideIndex + 1, callback);
+			} else {
+				callback(pdf.slides);
+			}
+		},
+
+		parse: function (rawData, callback) {
+			pdfjs.getDocument(require.toUrl(this.fileUrl)).then(function (pdfDocument) {
+				pdf.renderSlide(pdfDocument, 1, callback);
+			});
+		},
+	};
+
+	return pdf;
+
+});
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