AX: WebKit1 PluginViewBase objects with an associated widget()->platformWidget() should be considered attachments

• Component: Accessibility
• Status: RESOLVED FIXED

[Tyler Wilcock]

This is a regression from https://bugs.webkit.org/show_bug.cgi?id=229556 (AX: Make PDFs loaded via <embed> accessible).

[Radar WebKit Bug Importer]

<rdar://problem/85075555>

[Tyler Wilcock]

Created attachment 443420 [details]
Patch

[chris fleizach]

Comment on attachment 443420 [details]
Patch

Is it possible to have a test for this

[Andres Gonzalez]

(In reply to Tyler Wilcock from comment #2)
> Created attachment 443420 [details]
> Patch

--- a/Source/WebCore/accessibility/AccessibilityRenderObject.cpp
+++ a/Source/WebCore/accessibility/AccessibilityRenderObject.cpp

+    bool hasPlatformWidget = widget() && widget()->platformWidget();
+    if (is<PluginViewBase>(widget()) && !hasPlatformWidget) {

you can write this in just one line like:

    if (is<PluginViewBase>(widget()) && !widget()->platformWidget()) {

[Tyler Wilcock]

Created attachment 443443 [details]
Patch

[Tyler Wilcock]

(In reply to chris fleizach from comment #3)
> Comment on attachment 443420 [details]
> Patch
> 
> Is it possible to have a test for this
I haven't found a way to create a WK1 platformWidget-based object in a layout test. Do you know of a way?

I tried un-skipping the test added by the bug that caused the regression in WK1:

https://github.com/WebKit/WebKit/blob/f1f395b977bd8befab5023c5eda2cbde26aa9741/LayoutTests/accessibility/mac/basic-embed-pdf-accessibility.html#L14

But it still times out, so it wasn't this attachment bug causing the WK1 failure (which may mean <embed>s don’t use platformWidget’s in WK1).

I manually tested the WK1 WebView linked against a build of WebKit with this patch and confirmed the issue is fixed. I also manually tested both WK2 <embed> and <object> PDFs and confirmed they are still accessible (and the layout test for the WK2 path still passes).

I added a test for the renderWidgetChildren + AXEmptyGroup change.

[EWS]

Committed r285389 (243946@main): <https://commits.webkit.org/243946@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 443443 [details].