[Webkit-unassigned] [Bug 107042] New: AX: Improve table-guessing heuristics

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=107042

           Summary: AX: Improve table-guessing heuristics
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: dmazzoni at google.com


Good example: gmail's mail conversation table is not detected as a data table in AccessibilityTable::isDataTable currently, but it clearly should be.

Ideas:
1. Call it a data table if most cells have *either* a top or bottom border, rather than requiring both - but perhaps don't do this check if the table is particularly small or has one really small dimension
2. empty-cells: show is a good clue it's a data table
3. Borrowed from Firefox: if it has col, colgroup, tfoot, or thead it's a data table
4. Borrowed from Firefox: if it has >= 20 rows it's a data table

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