[Webkit-unassigned] [Bug 116296] New: [CSS Regions] Compute correct region ranges for boxes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=116296

           Summary: [CSS Regions] Compute correct region ranges for boxes
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: abucur at adobe.com
            Blocks: 116295


Created an attachment (id=202053)
 --> (https://bugs.webkit.org/attachment.cgi?id=202053&action=review)
A test case

The region ranges for boxes are currently compute incorrectly in some cases (e.g. the attached file). The layout process should be smart enough to select the correct region for a block by taking into account constraints such as:
- unsplittable boxes (they should always use the start region for layout - see the attached test case)
- overflow content - on a case by case basis the content needs to clamp to the containing block region range

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