147 lines
2.8 KiB
JavaScript
147 lines
2.8 KiB
JavaScript
var pdfjsLib = window['pdfjs-dist/build/pdf'];
|
|
|
|
|
|
function renderPage() {
|
|
|
|
var el_title = document.getElementById('pdfprogress');
|
|
|
|
|
|
el_title.innerHTML = 'Идет подготовка страницы ...';
|
|
|
|
pageRendering = true;
|
|
// Using promise to fetch the page
|
|
pdfDoc.getPage(pageNum).then(function(page) {
|
|
|
|
var canvas = document.getElementById('the-canvas');
|
|
var context = canvas.getContext('2d');
|
|
//var viewport = page.getViewport({scale: scale});
|
|
var viewport = page.getViewport({scale: 1.5});
|
|
// var viewport = page.getViewport(canvas.width / page.getViewport(0.5).width)
|
|
|
|
|
|
canvas.height = viewport.height;
|
|
canvas.width = viewport.width;
|
|
|
|
// Render PDF page into canvas context
|
|
var renderContext = {
|
|
canvasContext: context,
|
|
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;
|
|
|
|
}
|
|
// document.getElementById('zoompdf').innerHTML = scale + 'x';
|
|
el_title.innerHTML = 'Приятного чтения ↓';
|
|
});
|
|
});
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
function prevclick(){
|
|
prevurl = prevlink + '/'+ scale;
|
|
location.href = prevurl;
|
|
return;
|
|
}
|
|
|
|
function nextclick(){
|
|
nexturl = nextlink + '/'+ scale;
|
|
location.href = nexturl;
|
|
return;
|
|
}
|
|
|
|
|
|
function pdfzoomin(){
|
|
|
|
scale += 0.25;
|
|
setzoom(scale);
|
|
renderPage();
|
|
|
|
|
|
}
|
|
|
|
function pdfzoomout(){
|
|
|
|
scale -= 0.25;
|
|
setzoom(scale);
|
|
renderPage();
|
|
|
|
}
|
|
|
|
|
|
var cnt = 100;
|
|
function resize_plus(){
|
|
var div = document.getElementById("the-canvas");
|
|
cnt += 4;
|
|
div.style.width = cnt+"%";
|
|
setzoom(cnt);
|
|
}
|
|
function resize_minus(){
|
|
var div = document.getElementById("the-canvas");
|
|
cnt -= 4;
|
|
div.style.width = cnt+"%";
|
|
setzoom(cnt);
|
|
}
|
|
|
|
|
|
function getzoom(){
|
|
|
|
var name = 'pdfscale';
|
|
|
|
var results = document.cookie.match ( '(^|;) ?' + name + '=([^;]*)(;|$)' );
|
|
|
|
if ( results ){
|
|
return parseFloat(unescape(results[2]));
|
|
}
|
|
else {
|
|
return null;
|
|
}
|
|
|
|
}
|
|
|
|
function setzoom( cvalue, exdays = 30 ) {
|
|
|
|
var cname = 'pdfscale';
|
|
|
|
var d = new Date();
|
|
d.setTime(d.getTime() + (exdays*24*60*60*1000));
|
|
|
|
|
|
var expires = "expires="+ d.toUTCString();
|
|
document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
|
|
|
|
}
|
|
|
|
|
|
function startpdfviewer(){
|
|
|
|
var div = document.getElementById("the-canvas");
|
|
|
|
czoom = getzoom();
|
|
|
|
if (czoom != null & czoom > 10) {
|
|
div.style.width = czoom+"%"
|
|
|
|
}
|
|
|
|
|
|
pdfjsLib.getDocument(url).promise.then(function(pdfDoc_) {
|
|
pdfDoc = pdfDoc_;
|
|
renderPage();
|
|
});
|
|
|
|
}
|
|
|
|
|
|
|