139 lines
2.6 KiB
JavaScript
139 lines
2.6 KiB
JavaScript
var pdfjsLib = window['pdfjs-dist/build/pdf'];
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function renderPage() {
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var el_title = document.getElementById('pdfprogress');
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el_title.innerHTML = 'Идет подготовка страницы ...';
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pageRendering = true;
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// Using promise to fetch the page
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pdfDoc.getPage(pageNum).then(function(page) {
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var canvas = document.getElementById('the-canvas');
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var context = canvas.getContext('2d');
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//var viewport = page.getViewport({scale: scale});
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var viewport = page.getViewport({scale: 1});
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canvas.height = viewport.height;
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canvas.width = viewport.width;
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// Render PDF page into canvas context
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var renderContext = {
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canvasContext: context,
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viewport: viewport
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};
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var renderTask = page.render(renderContext);
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// Wait for rendering to finish
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renderTask.promise.then(function() {
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pageRendering = false;
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if (pageNumPending !== null) {
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// New page rendering is pending
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renderPage(pageNumPending);
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pageNumPending = null;
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}
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document.getElementById('zoompdf').innerHTML = scale + 'x';
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el_title.innerHTML = 'Приятного чтения ↓';
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});
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});
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}
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function prevclick(){
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prevurl = prevlink + '/'+ scale;
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location.href = prevurl;
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return;
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}
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function nextclick(){
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nexturl = nextlink + '/'+ scale;
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location.href = nexturl;
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return;
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}
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function pdfzoomin(){
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scale += 0.25;
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setzoom(scale);
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renderPage();
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}
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function pdfzoomout(){
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scale -= 0.25;
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setzoom(scale);
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renderPage();
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}
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var cnt = 100;
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function resize_plus(){
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var div = document.getElementById("the-canvas");
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cnt += 2;
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div.style.width = cnt+"%";
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}
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function resize_minus(){
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var div = document.getElementById("the-canvas");
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cnt -= 2;
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div.style.width = cnt+"%";
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}
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function getzoom(){
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var name = 'pdfscale';
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var results = document.cookie.match ( '(^|;) ?' + name + '=([^;]*)(;|$)' );
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if ( results ){
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return parseFloat(unescape(results[2]));
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}
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else {
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return null;
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}
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}
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function setzoom( cvalue, exdays = 30 ) {
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var cname = 'pdfscale';
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var d = new Date();
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d.setTime(d.getTime() + (exdays*24*60*60*1000));
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var expires = "expires="+ d.toUTCString();
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document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
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}
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function startpdfviewer(){
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czoom = getzoom();
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if (czoom != null)
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scale = czoom;
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pdfjsLib.getDocument(url).promise.then(function(pdfDoc_) {
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pdfDoc = pdfDoc_;
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renderPage();
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});
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}
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