[Webkit-unassigned] [Bug 88110] New: Prepare table collapsed border computation to support mixed directionality on row group

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=88110

           Summary: Prepare table collapsed border computation to support
                    mixed directionality on row group
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tables
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jchaffraix at webkit.org
                CC: robert at webkit.org
            Blocks: 87900


The code doesn't handle mixed directionality inside a table and will fail pretty badly if it is involved. CSS 2.1 and CSS 3 writing-modes however allow the use of mixed directionality.

The difficulty with mixed directionality is that the start / end borders don't map strictly anymore: the table start border will be the section's end border if the table and section have mixed directionality.

To account for that, we need new methods to properly get the adjoining borders regardless of the directions.

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