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-rw-r--r--dist/js/pdf-view-tech.js108
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diff --git a/dist/js/pdf-view-tech.js b/dist/js/pdf-view-tech.js
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-/** This code is under the Apache License Version 2.0, January 2004
- * http://www.apache.org/licenses/, as it is heavily based on
- * documentation of pdf.js (which is under Apache License v2.0)
- */
-
-PDFJS.workerSrc = '/dist/js/pdf.worker.min.js';
-
-var url = '/presentations/tech.pdf';
-
-var pdfDoc = null,
- pageNum = 1,
- pageRendering = false,
- pageNumPending = null,
- scale = 1,
- canvasLeft = document.getElementById('the-canvas-left'),
- canvasRight = document.getElementById('the-canvas-right');
-
-/**
- * Get page info from document, resize canvas accordingly, and render page.
- * @param num Page number.
- */
-function renderPage(canvas,num) {
- pageRendering = true;
- // Using promise to fetch the page
- pdfDoc.getPage(num).then(function(page) {
- var viewport = page.getViewport(scale);
- canvas.height = viewport.height;
- canvas.width = viewport.width;
-
- // Render PDF page into canvas context
- var renderContext = {
- canvasContext: canvas.getContext('2d'),
- viewport: viewport
- };
- var renderTask = page.render(renderContext);
-
- // Wait for rendering to finish
- renderTask.promise.then(function() {
- pageRendering = false;
- if (pageNumPending !== null) {
- // New page rendering is pending
- renderPage(pageNumPending);
- pageNumPending = null;
- }
- });
- });
-}
-
-/**
- * If another page rendering in progress, waits until the rendering is
- * finised. Otherwise, executes rendering immediately.
- */
-function queueRenderPage(num) {
- if (pageRendering) {
- pageNumPending = num;
- } else {
- renderPage(canvasLeft,num);
- renderPage(canvasRight,num+1);
- }
-}
-
-/**
- * Displays previous page.
- */
-function onPrevPage(event) {
- event.preventDefault();
- if (pageNum <= 1) {
- return;
- }
- pageNum--;
- queueRenderPage(pageNum);
-}
-document.getElementById('canvas-left').addEventListener('click', onPrevPage);
-
-/**
- * Displays next page.
- */
-function onNextPage(event) {
- event.preventDefault();
- if (pageNum >= pdfDoc.numPages - 1) {
- return;
- }
- pageNum++;
- queueRenderPage(pageNum);
-}
-document.getElementById('canvas-right').addEventListener('click', onNextPage);
-
-document.getElementById('canvas-left').style.display = 'block';
-document.getElementById('canvas-right').style.display = 'block';
-
-
-function onMouseDown(event) {
- event.preventDefault();
-}
-
-document.getElementById('canvas-left').addEventListener('mousedown', onMouseDown);
-document.getElementById('canvas-right').addEventListener('mousedown', onMouseDown);
-
-/**
- * Asynchronously downloads PDF.
- */
-PDFJS.getDocument(url).then(function(pdfDoc_) {
- pdfDoc = pdfDoc_;
-
- // Initial/first page rendering
- renderPage(canvasLeft,pageNum);
- renderPage(canvasRight,pageNum + 1);
-});