[Webkit-unassigned] [Bug 134021] New: Size of stretchy horizontal braces is not updated properly

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=134021

           Summary: Size of stretchy horizontal braces is not updated
                    properly
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: MathML
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: fred.wang at free.fr
        Depends on: 72828


Created an attachment (id=233293)
 --> (https://bugs.webkit.org/attachment.cgi?id=233293&action=review)
Screenshot

Use Linux with (for example) Latin Modern Math fonts installed.
Go to the MathML torture test and check test 22 with "Latin Modern Math" item selected. If you zoom in and then out, the size of the horizontal braces is not updated.

If wonder if the problem is due to the fact that the stretchSize() is included in the preferred width computation and the m_stretchWidth is cached on the renderer object. Perhaps the stretch width should instead only be taken in consideration in RenderMathMLSpace::updateLogicalWidth(), like what is done for mspace.

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