[Webkit-unassigned] [Bug 160339] New: Move determination of operator direction DOM class and reduce relayout

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=160339

            Bug ID: 160339
           Summary: Move determination of operator direction DOM class and
                    reduce relayout
    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
        Depends on: 160336
            Blocks: 156537

After bug 160336, m_isVertical is the only remaining property set in RenderMathMLOperator::setOperatorProperties. We calculate it in MathMLOperatorElement and so RenderMathMLOperator::setOperatorProperties can be removed. It seems that we can then remove many needs-relayout calls without breaking tests.

I'm not sure for mfenced and I think we don't really have good test coverage for this element. So for now to be safe let's kept the calls RenderMathMLFencedOperator::setOperatorProperties in various functions by overriding the RenderMathMLOperator implementations.

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