[Webkit-unassigned] [Bug 122291] New: Web Inspector: [CSS Regions] Display the correct fragment boxes for content inside flow threads

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=122291

           Summary: Web Inspector: [CSS Regions] Display the correct
                    fragment boxes for content inside flow threads
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: achicu at adobe.com
                CC: timothy at apple.com, joepeck at webkit.org,
                    webkit-bug-importer at group.apple.com, graouts at apple.com


Currently the inspector overlay will try to map the boxes using localToAbsoluteQuad. However, that is not working correctly for elements inside flow threads as they can be split across multiple regions. Currently, localToAbsoluteQuad will try to use the region that has the center of the box ending up with bad looking results.

Also, fragments inside regions can end up having different widths and margins, because width: 100% might mean something else when you flow in a smaller region.

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