[Webkit-unassigned] [Bug 161132] New: Do not store layout parameters on the RenderMathMLRoot class

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=161132

            Bug ID: 161132
           Summary: Do not store layout parameters on the RenderMathMLRoot
                    class
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: MathML
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: fred.wang at free.fr

Storing layout parameters on the RenderMathMLRoot class may cause update issues (e.g. when zooming in/out). This is actually not really needed since reading the parameters from the MATH table is not too expensive and most of them are only used during layoutBlock. We separate horizontal and vertical parameters since the latter are not need for preferred width calculations.

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