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[api-minor] Implement basic support for OptionalContent Usage
dicts (issue 5764, bug 1826783)
The following are some highlights of this patch: - In the Worker we only extract a *subset* of the potential contents of the `Usage` dictionary, to avoid having to implement/test a bunch of code that'd be completely unused in the viewer. - In order to still allow the user to *manually* override the default visible layers in the viewer, the viewable/printable state is purposely *not* enforced during initialization in the `OptionalContentConfig` constructor. - Printing will now always use the *default* visible layers, rather than using the same state as the viewer (as was the case previously). This ensures that the printing-output will correctly take the `Usage` dictionary into account, and in practice toggling of visible layers rarely seem to be necessary except in the viewer itself (if at all).[1] --- [1] In the unlikely case that it'd ever be deemed necessary to support fine-grained control of optional content visibility during printing, some new (additional) UI would likely be needed to support that case.
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13 changed files with 186 additions and 62 deletions
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@ -781,7 +781,9 @@ class PDFViewer {
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const pagesCount = pdfDocument.numPages;
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const firstPagePromise = pdfDocument.getPage(1);
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// Rendering (potentially) depends on this, hence fetching it immediately.
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const optionalContentConfigPromise = pdfDocument.getOptionalContentConfig();
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const optionalContentConfigPromise = pdfDocument.getOptionalContentConfig({
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intent: "display",
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});
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const permissionsPromise = this.#enablePermissions
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? pdfDocument.getPermissions()
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: Promise.resolve();
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@ -1822,7 +1824,7 @@ class PDFViewer {
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console.error("optionalContentConfigPromise: Not initialized yet.");
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// Prevent issues if the getter is accessed *before* the `onePageRendered`
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// promise has resolved; won't (normally) happen in the default viewer.
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return this.pdfDocument.getOptionalContentConfig();
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return this.pdfDocument.getOptionalContentConfig({ intent: "display" });
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}
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return this._optionalContentConfigPromise;
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}
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