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Try load pdf preview again on error [SCI-5449] (#3121)

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* Try load pdf preview again on error [SCI-5449]

* Add attempts counter [SCI-5449]
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aignatov-bio 2021-01-29 11:34:53 +01:00 committed by GitHub
parent 0d1939e405
commit 1df44f8383
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 10 additions and 1 deletions
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11
app/assets/javascripts/sitewide/pdf_preview.js
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@ -6,6 +6,7 @@ var PdfPreview = (function() {
const MAX_ZOOM = 3;
const DEFAULT_ZOOM = 1;
const ZOOM_STEP = 0.25;
const MAX_LOAD_ATTEMPTS = 5;
var pageRendering = false;
@ -104,7 +105,7 @@ var PdfPreview = (function() {
$(canvas).data(
'custom-scrollbar',
new PerfectScrollbar($(canvas).closest('.page-container')[0])
);
).data('load-attempts', 0);
pdfjsLib.GlobalWorkerOptions.workerSrc = canvas.dataset.pdfWorkerUrl;
loadPdfDocument(canvas);
}
@ -112,6 +113,7 @@ var PdfPreview = (function() {
function loadPdfDocument(canvas, page = 1) {
var loadingPdf = pdfjsLib.getDocument(canvas.dataset.pdfUrl);
$(canvas).data('load-attempts', $(canvas).data('load-attempts') + 1);
loadingPdf.promise
.then(function(pdfDocument) {
$(canvas).data('pdfDocument', pdfDocument);
@ -178,6 +180,13 @@ var PdfPreview = (function() {
refreshZoomButtons(canvas);
pageRendering = false;
return renderTask.promise;
}).catch(function() {
pageRendering = false;
if ($(canvas).data('load-attempts') <= MAX_LOAD_ATTEMPTS) {
setTimeout(function() {
loadPdfDocument(canvas, page);
}, 5000);
}
});
return true;