1554831 - Fission a11y: Fix HWND returned by accessibles in OOP iframes with window emulation

Status: RESOLVED FIXED

(Core :: Disability Access APIs, defect, P2)

Description

[James Teh [:Jamie]]

When window emulation is enabled (for screen readers which rely on this such as JAWS), IAccessible2::windowHandle on accessibles within OOP iframe documents is returning the Firefox main window instead of the emulated document window.

Comment 1

[James Teh [:Jamie]]

Attachment: Bug 1554831: For out-of-process iframe documents on Windows, send the a11y emulated window (if any) to the content process.

If window emulation is enabled, an out-of-process iframe document should use the same emulated window as its embedder.
Previously, we were setting this on DocAccessibleParent, but we weren't sending it to content to make it available on DocAccessibleChild.
This meant that accessibles in out-of-process iframe documents were reporting the wrong window handle.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/36d571eb9198
For out-of-process iframe documents on Windows, send the a11y emulated window (if any) to the content process. r=eeejay

Comment 3

[Bogdan Tara[:bogdan_tara | bogdant]]

https://hg.mozilla.org/mozilla-central/rev/36d571eb9198