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Tweak the "pagesloaded" event handler in PDFOutlineViewer

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These changes improves the consistency ever so slightly in the `PDFOutlineViewer._dispatchEvent` method, by making sure that we can tell the following two cases apart:
 - The "pagesloaded" event has *not yet* been fired.
 - The "pagesloaded" event has been fired, but no pages were available.
This commit is contained in:
Jonas Jenwald 2021-12-04 16:48:15 +01:00
parent 9de30c4ff0
commit e027178356
1 changed files with 5 additions and 3 deletions
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8
web/pdf_outline_viewer.js
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@ -72,7 +72,7 @@ class PDFOutlineViewer extends BaseTreeViewer {
this._pageNumberToDestHashCapability = null; this._pageNumberToDestHashCapability = null;
this._currentPageNumber = 1; this._currentPageNumber = 1;
this._isPagesLoaded = false; this._isPagesLoaded = null;
if ( if (
this._currentOutlineItemCapability && this._currentOutlineItemCapability &&
@ -93,8 +93,10 @@ class PDFOutlineViewer extends BaseTreeViewer {
this._pdfDocument?.loadingParams.disableAutoFetch this._pdfDocument?.loadingParams.disableAutoFetch
) { ) {
this._currentOutlineItemCapability.resolve(/* enabled = */ false); this._currentOutlineItemCapability.resolve(/* enabled = */ false);
} else if (this._isPagesLoaded) { } else if (this._isPagesLoaded !== null) {
this._currentOutlineItemCapability.resolve(/* enabled = */ true); this._currentOutlineItemCapability.resolve(
/* enabled = */ this._isPagesLoaded
);
} }
this.eventBus.dispatch("outlineloaded", { this.eventBus.dispatch("outlineloaded", {