tree 4997045b31dd699e5011bb28e5adde3ceffe28e7
parent e7faecc4fcb24350646e1305ac734c97b2abfc44
author tyler_w@apple.com <tyler_w@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1656002646 +0000
committer tyler_w@apple.com <tyler_w@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1656002646 +0000

AX: AXIsolatedTree::updateChildren sometimes fails to update isolated subtrees when the given live object is ignored
https://bugs.webkit.org/show_bug.cgi?id=241735

Reviewed by Andres Gonzalez.

Our current algorithm in AXIsolatedTree::updateChildren is:

  1. If the object we got an AXChildrenChanged notification
  for is in the isolated tree, update its isolated children

  2. Otherwise, ascend the ancestry to the nearest
  in-isolated-tree ancestor, and update the children of that
  object

This is not always adequate when the object passed to updateChildren
is ignored, as in some cases the ancestor has no children changes
but the subtrees of the ignored object do.

This patch fixes this by also checking the live-children of the ignored
object for any that have unitialized children. If so, we call
AXIsolatedTree::updateChildren on those too.

* Source/WebCore/accessibility/AccessibilityObject.h:
(WebCore::AccessibilityObject::childrenInitialized const):
Move from private to public.
* Source/WebCore/accessibility/isolatedtree/AXIsolatedTree.cpp:
(WebCore::AXIsolatedTree::updateChildren):

Canonical link: https://commits.webkit.org/251784@main


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@295779 268f45cc-cd09-0410-ab3c-d52691b4dbfc