[Webkit-unassigned] [Bug 233383] New: AX: aria-owns in trees results duplicate rows, third level rows not being exposed

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=233383

            Bug ID: 233383
           Summary: AX: aria-owns in trees results duplicate rows, third
                    level rows not being exposed
           Product: WebKit
           Version: Safari 15
          Hardware: All
                OS: macOS 12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sparhami at apple.com
                CC: andresg_22 at apple.com,
                    webkit-bug-importer at group.apple.com

Created attachment 444850

  --> https://bugs.webkit.org/attachment.cgi?id=444850&action=review

A reproducing example

When you link children of a tree node via `aria-owns`, none of their children are exposed. That is, in the following snippet:

```
<div role="tree" tabindex="0">
    <div role="treeitem" aria-selected="false" aria-expanded="true" aria-level="1">
        <div>Folder one</div>
        <div role="group" aria-owns="item1"></div>
    </div>

    <div id="item1" role="treeitem" aria-selected="false" aria-expanded="true" aria-level="2">
        <div>Child one</div>
        <div role="group">
            <div role="treeitem" aria-selected="false" aria-level="3">
                <div>Grandchild one</div>
            </div>
        </div>
    </div>
</div>
```

Steps To Reproduce:
1. Open the attached `example.html`
2. Navigate to the first table
3. Enter the first table 
4. Go to next item -> “Child one expanded…”
5. Go to next item -> “Child two”

Results:
At step 5, I expect VoiceOver to move to “Grandchild one” and not “Child two”.


Notes:
- Safari does read “Child one, expanded. 1 item enclosed.”, when the VoiceOver cursor moves there, so it seems like it does know about the child, it just doesn’t navigate there.

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