comunic/3rdparty/pdf.js/examples/svgviewer/viewer.js
2016-11-19 12:08:12 +01:00

59 lines
2.0 KiB
JavaScript
Executable File

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