Sakurai/pdf.js
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Remove the DownloadManager.onerror functionality, since its only usage is unlikely to be helpful

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Note how the `onerror` functionality is not being used in the GENERIC `DownloadManager`, since we have no way of knowing if downloading succeeded.
Hence this functionality is only *possibly* useful in MOZCENTRAL builds, however as outlined in the existing comments it's unlikely to be helpful in practice. Generally speaking, if downloading failed once in [`PdfStreamConverter.jsm`](https://searchfox.org/mozilla-central/rev/809ac3660845fef6faf18ec210232fdadc0f1ad9/toolkit/components/pdfjs/content/PdfStreamConverter.jsm#294-406) it seems very likely that it would fail again; all-in-all I'm thus suggesting that we just remove the `onerror` functionality altogether here.
This commit is contained in:
Jonas Jenwald 2021-01-02 12:02:58 +01:00
parent c4b95d925f
commit 775d45b36a
3 changed files with 4 additions and 13 deletions
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10
web/app.js
View File

@ -993,11 +993,6 @@ const PDFViewerApplication = {
const downloadManager = this.downloadManager,
url = this.baseUrl,
filename = this._docFilename;
downloadManager.onerror = err => {
// This error won't really be helpful because it's likely the
// fallback won't work either (or is already open).
this.error(`PDF failed to download: ${err}`);
};
// When the PDF document isn't ready, or the PDF file is still downloading,
// simply download using the URL.
@ -1023,11 +1018,6 @@ const PDFViewerApplication = {
const downloadManager = this.downloadManager,
url = this.baseUrl,
filename = this._docFilename;
downloadManager.onerror = err => {
// This error won't really be helpful because it's likely the
// fallback won't work either (or is already open).
this.error(`PDF failed to be saved: ${err}`);
};
// When the PDF document isn't ready, or the PDF file is still downloading,
// simply download using the URL.

1
web/download_manager.js
View File

@ -71,7 +71,6 @@ class DownloadManager {
this.downloadUrl(url, filename);
return;
}
const blobUrl = URL.createObjectURL(blob);
download(blobUrl, filename);
}

6
web/firefoxcom.js
View File

@ -130,8 +130,10 @@ class DownloadManager {
filename,
sourceEventType,
}).then(error => {
if (error && this.onerror) {
this.onerror(error);
if (error) {
// If downloading failed in `PdfStreamConverter.jsm` it's very unlikely
// that attempting to fallback and re-download would be helpful here.
console.error("`ChromeActions.download` failed.");
}
URL.revokeObjectURL(blobUrl);
});