[Webkit-unassigned] [Bug 146502] New: AX: Improve interaction inside MathML table

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=146502

            Bug ID: 146502
           Summary: AX: Improve interaction inside MathML table
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: fred.wang at free.fr
                CC: webkit-bug-importer at group.apple.com

Steps:

- Open https://mdn.mozillademos.org/en-US/docs/Mozilla/MathML_Project/MathML_Torture_Test$samples/MathML_Torture_Test and move to the MathML test 24.
- Press Control-Option-Shift Down Arrow to start interacting with the <math> element.
- You can now navigate inside the MathML expression. Move to the <mtable> element.
- Press Control-Option-Shift Down Arrow to start interacting with the <mtable> element. You can now select each <mtr> row.
- Press Control-Option-Shift Down Arrow to start interacting with one <mtr> row. You can now navigate inside the <mtd> cell of this row.

Actual results:
- To navigate vertically inside the <mtable>, you need to select an <mtr> and move vertically.
- To navigate horizontally inside the <mtable>, you need to select one <mtd> and move horizontally. You can only move to the cells in the same row.

Expected results:
- It should be possible to navigate in any direction inside the <mtable> element, just like for HTML <table>

Note 1: I suspect this is first a WebKit bug, we need to expose the appropriate semantics. AFAIK, <mtable> do not expose the same attributes as standard <table>.
Note 2: As a comparison, Orca development version supports navigation inside <mtable> the same as for HTML <table>.

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