[Webkit-unassigned] [Bug 117444] New: Correctly handle auto margins for flipped writing modes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=117444

           Summary: Correctly handle auto margins for flipped writing
                    modes
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: BlinkMergeCandidate
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rniwa at webkit.org
                CC: hyatt at apple.com, dino at apple.com


Consider merging https://chromium.googlesource.com/chromium/blink/+/882b259b17c19f10e9a7b36bf9ca54a399b5f416

Correctly handle auto margins for flipped writing modes

Handling of auto margins for flipped writing modes (vertical-rl and
horizontal-bt) was broken. We need to adjust the position if
margin-before is auto, and for them, that's bottom/right, not top/left.

This was found by noticing unexpected alignment in
flex-flow-auto-margins.html. I am not sure why
flex-align-vertical-writing-mode.html had the expectations it had, as
far as I can tell, they were just wrong.

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