45 lines
1.6 KiB
JavaScript
45 lines
1.6 KiB
JavaScript
// If absolute URL from the remote server is provided, configure the CORS
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// header on that server.
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// Loaded via <script> tag, create shortcut to access PDF.js exports.
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var pdfjsLib = window['pdfjs-dist/build/pdf'];
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// The workerSrc property shall be specified.
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pdfjsLib.GlobalWorkerOptions.workerSrc = '/pub/scripts/pdf.worker.js';
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document.getElementById('pdfprogress').innerHTML = 'Идет подготовка страницы ...';
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// Asynchronous download of PDF
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var loadingTask = pdfjsLib.getDocument(url);
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loadingTask.promise.then(function(pdf) {
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console.log('PDF loaded');
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document.getElementById('pdfprogress').innerHTML = 'Загружаем pdf. Пожалуйста подождите... ...';
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// Fetch the first page
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pdf.getPage(pageNumber).then(function(page) {
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document.getElementById('pdfprogress').innerHTML = 'Идет обработка страницы ...';
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var viewport = page.getViewport({scale: scale});
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// Prepare canvas using PDF page dimensions
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var canvas = document.getElementById('the-canvas');
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var context = canvas.getContext('2d');
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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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renderTask.promise.then(function () {
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document.getElementById('pdfprogress').innerHTML = 'Приятного чтения ↓';
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});
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});
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}, function (reason) {
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// PDF loading error
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console.error(reason);
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}); |