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Export the XFA/StructTree-layers in the viewer components

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While e.g. the `simpleviewer` and `singlepageviewer` examples work, since they're based on the `BaseViewer`-class, the standalone `pageviewer` example currently doesn't support either XFA- or StructTree-layers. This seems like an obvious oversight, which can be easily addressed simply by exporting the necessary functionality through `pdf_viewer.component.js`, similar to the existing Text/Annotation-layers.

While working on, and testing, these changes I happened to notice a number of smaller things that's also fixed in this patch:

 - Ensure that `XfaLayerBuilder.render` always have a *consistent* return type, to prevent possible run-time failures in `PDFPageView`; PR 13908 follow-up.

 - Change the order of the options in the `XfaLayerBuilder`-constructor to agree with the parameter order in the `DefaultXfaLayerFactory.createXfaLayerBuilder`-method.

 - Add a missing `textHighlighterFactory`-option, in the JSDocs for the `PDFPageView`-class.

 - A couple of small tweaks in the `TextLayerBuilder.render`-method: Re-use an existing Array rather than creating a new one, and replace an `if` with optional chaining instead.

*Please note:* For now XFA-support is currently disabled by default, similar to the regular viewer.
This commit is contained in:
Jonas Jenwald 2021-08-28 18:09:39 +02:00
parent 153d058b3a
commit c6d400ed06
6 changed files with 29 additions and 17 deletions
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6
examples/components/pageviewer.js
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@ -54,11 +54,13 @@ loadingTask.promise.then(function (pdfDocument) {
scale: SCALE,
defaultViewport: pdfPage.getViewport({ scale: SCALE }),
eventBus,
// We can enable text/annotations layers, if needed
// We can enable text/annotation/xfa/struct-layers, as needed.
textLayerFactory: new pdfjsViewer.DefaultTextLayerFactory(),
annotationLayerFactory: new pdfjsViewer.DefaultAnnotationLayerFactory(),
xfaLayerFactory: new pdfjsViewer.DefaultXfaLayerFactory(),
structTreeLayerFactory: new pdfjsViewer.DefaultStructTreeLayerFactory(),
});
// Associates the actual page with the view, and drawing it
// Associate the actual page with the view, and draw it.
pdfPageView.setPdfPage(pdfPage);
return pdfPageView.draw();
});