Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 4ca184ab533923ad2a3e147923ac192b72252bc5
https://github.com/WebKit/WebKit/commit/4ca184ab533923ad2a3e147923ac192b72252bc5
Author: Andres Gonzalez <[email protected]>
Date: 2023-06-08 (Thu, 08 Jun 2023)
Changed paths:
M Source/WebCore/accessibility/AXObjectCache.cpp
M Source/WebCore/accessibility/AXObjectCache.h
M Source/WebCore/accessibility/AXTreeStore.h
M Source/WebCore/accessibility/isolatedtree/AXIsolatedObject.cpp
M Source/WebCore/accessibility/isolatedtree/AXIsolatedTree.cpp
M Source/WebCore/accessibility/isolatedtree/AXIsolatedTree.h
M Source/WebCore/page/Page.cpp
M Source/WebKit/WebProcess/WebPage/WebPage.cpp
M Source/WebKit/WebProcess/cocoa/WebProcessCocoa.mm
Log Message:
-----------
AX: Avoid hitting the main thread in
NSApplicationAccessibilityFocusedUIElement in isolated tree mode.
https://bugs.webkit.org/show_bug.cgi?id=256761
<rdar://problem/109307200>
Reviewed by Chris Fleizach and Tyler Wilcock.
NSApplicationAccessibilityFocusedUIElement is frequently called by AT to track
the focus object. Currently it has to hit the main thread every time.
This patch fixes this by adding a mechanism to keep track of the focused AX
tree based on the associated Page ActivityState. Then, the focused object is
retrieved from the focused tree obtained via AXTreeStore::findTree.
In addition, this patch also caches the HelpText for ScrollViews and WebAreas
eagerly since that's another property requested by AT while the isolated tree
is being built.
Canonical link: https://commits.webkit.org/264985@main
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