1783094 - Support RemoteAccessible relation targets on Windows when the cache is disabled

Status: RESOLVED FIXED

(Core :: Disability Access APIs, task)

Description

[James Teh [:Jamie]]

Currently, LocalAccessible::RelationByType can never return RemoteAccessibles. After bug 1782172, the EMBEDS relation might return a RemoteAccessible.

ia2Accessible relation methods use MsaaAccessible::GetFrom. When CTW is enabled, this is fine. However, when the cache is disabled, MsaaAccessible::GetFrom will return a stub which only holds the id and will crash if used by clients. We need to use MsaaAccessible::NativeAccessible instead.

Fixing this is annoying because we won't need this fix at all once CTW is the only code path. Such is life.

Comment 1

[James Teh [:Jamie]]

Attachment: Bug 1783094: Support non-cached RemoteAccessible relation targets in ia2Accessible relation methods.

When the cache is disabled, MsaaAccessible::GetFrom won't give us an object we can return to the client.
Instead, we must use MsaaAccessible::NativeAccessible, which knows how to return a COM proxy in this case.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/ac7902988645
Support non-cached RemoteAccessible relation targets in ia2Accessible relation methods. r=morgan

Comment 3

[Norisz Fay [:noriszfay]]

https://hg.mozilla.org/mozilla-central/rev/ac7902988645