59 lines
2.0 KiB
JavaScript
59 lines
2.0 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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//
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// See README for overview
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//
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'use strict';
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// Parse query string to extract some parameters (it can fail for some input)
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var query = document.location.href.replace(/^[^?]*(\?([^#]*))?(#.*)?/, '$2');
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var queryParams = query ? JSON.parse('{' + query.split('&').map(function (a) {
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return a.split('=').map(decodeURIComponent).map(JSON.stringify).join(': ');
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}).join(',') + '}') : {};
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var url = queryParams.file || '../../test/pdfs/liveprogramming.pdf';
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var scale = +queryParams.scale || 1.5;
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//
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// Fetch the PDF document from the URL using promises
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//
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PDFJS.getDocument(url).then(function(pdf) {
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var numPages = pdf.numPages;
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// Using promise to fetch the page
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// For testing only.
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var MAX_NUM_PAGES = 50;
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var ii = Math.min(MAX_NUM_PAGES, numPages);
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var promise = Promise.resolve();
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for (var i = 1; i <= ii; i++) {
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var anchor = document.createElement('a');
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anchor.setAttribute('name', 'page=' + i);
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anchor.setAttribute('title', 'Page ' + i);
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document.body.appendChild(anchor);
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// Using promise to fetch and render the next page
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promise = promise.then(function (pageNum, anchor) {
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return pdf.getPage(pageNum).then(function (page) {
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var viewport = page.getViewport(scale);
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var container = document.createElement('div');
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container.id = 'pageContainer' + pageNum;
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container.className = 'pageContainer';
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container.style.width = viewport.width + 'px';
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container.style.height = viewport.height + 'px';
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anchor.appendChild(container);
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return page.getOperatorList().then(function (opList) {
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var svgGfx = new PDFJS.SVGGraphics(page.commonObjs, page.objs);
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return svgGfx.getSVG(opList, viewport).then(function (svg) {
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container.appendChild(svg);
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});
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});
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});
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}.bind(null, i, anchor));
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}
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});
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