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Use a link, rather than window.open, when opening PDF attachments in Firefox (bug 1661259)

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Unfortunately e.g. ad blockers can interfere with `window.open` calls, thus preventing PDF attachments from being opened/viewed. For the MOZCENTRAL-build, we can work-around this problem by using a (hidden) link instead.
This commit is contained in:
Jonas Jenwald 2020-08-26 19:02:51 +02:00
parent 4ffdbe6ec9
commit 1e5d4b6a80
1 changed files with 16 additions and 1 deletions
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15
web/pdf_attachment_viewer.js
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@ -118,7 +118,22 @@ class PDFAttachmentViewer extends BaseTreeViewer {
encodeURIComponent(blobUrl + "#" + filename);
}
try {
if (typeof PDFJSDev === "undefined" || !PDFJSDev.test("MOZCENTRAL")) {
window.open(viewerUrl);
} else {
// Since we have a full URL in the MOZCENTRAL-build, use a link rather
// than `window.open` since e.g. ad blockers may otherwise force-close
// the newly opened window and thus break viewing of PDF attachments
// (fixes bug 1661259).
const a = document.createElement("a");
a.hidden = true;
a.href = viewerUrl;
a.target = "_blank";
// <a> must be in the document, otherwise `a.click()` is ignored.
(document.body || document.documentElement).appendChild(a);
a.click();
a.remove();
}
} catch (ex) {
console.error(`_bindPdfLink: ${ex}`);
// Release the `blobUrl`, since opening it failed...