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100 lines
2.5 KiB
100 lines
2.5 KiB
/**
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* (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
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*
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* All Rights Reserved. See copyright.txt for details and a complete list of authors.
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* Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
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* $Id$
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*
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* Handles pdf.js to load and display the PDF document in webpage.
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*/
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function getQueryVariable(variable) {
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var query = window.location.search.substring(1);
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var vars = query.split("&");
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for (var i=0;i<vars.length;i++) {
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var pair = vars[i].split("=");
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if (pair[0] == variable) {
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return pair[1];
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}
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}
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return '';
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}
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/**
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* Displays previous page.
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*/
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function prevPage() {
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changePage(pdfSinglePageViewer.currentPageNumber - 1);
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}
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/**
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* Displays next page.
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*/
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function nextPage() {
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changePage(pdfSinglePageViewer.currentPageNumber + 1);
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}
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/**
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* Changes document to a specific page
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*/
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function changePage(pageNum) {
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if (pageNum < 1) {
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return;
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}
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if (pageNum > pdfSinglePageViewer.pagesCount) {
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return;
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}
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if (pageNum === 1) {
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$('#prev').addClass('disabled');
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}
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if (pageNum > 1) {
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$('#prev').removeClass('disabled');
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}
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if (pageNum < pdfSinglePageViewer.pagesCount) {
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$('#next').removeClass('disabled');
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}
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if (pageNum === pdfSinglePageViewer.pagesCount) {
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$('#next').addClass('disabled');
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}
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pdfSinglePageViewer.currentPageNumber = pageNum;
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$('#page_num').html(pageNum);
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}
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$('#prev').on('click', function() { prevPage(); });
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$('#next').on('click', function() { nextPage(); });
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var pdf = {
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url: $('#source-link').val() || getQueryVariable('fileSrc'),
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cMapUrl: 'vendor/npm-asset/pdfjs-dist-viewer-min/build/minified/web/cmaps',
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cMapPacked: true
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};
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var container = document.getElementById('viewerContainer');
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container.addEventListener('pagesinit', function () {
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// Update document scale
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pdfSinglePageViewer.currentScaleValue = 'page-width';
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changePage(pdfSinglePageViewer.currentPageNumber);
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$('#page_count').html(pdfSinglePageViewer.pagesCount);
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});
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var pdfLinkService = new pdfjsViewer.PDFLinkService();
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var pdfSinglePageViewer = new pdfjsViewer.PDFSinglePageViewer({
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container: container,
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linkService: pdfLinkService,
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});
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pdfLinkService.setViewer(pdfSinglePageViewer);
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/**
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* Asynchronously downloads PDF.
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*/
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pdfjsLib.getDocument(pdf).then(function(pdfDocument) {
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pdfSinglePageViewer.setDocument(pdfDocument);
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pdfLinkService.setDocument(pdfDocument, null);
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});
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