[Webkit-unassigned] [Bug 143922] New: PropertySetCSSStyleDeclaration::setPropertyInternal() often says the property changed when it has not

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Sat Apr 18 13:02:34 PDT 2015


https://bugs.webkit.org/show_bug.cgi?id=143922

            Bug ID: 143922
           Summary: PropertySetCSSStyleDeclaration::setPropertyInternal()
                    often says the property changed when it has not
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com
                CC: koivisto at iki.fi

PropertySetCSSStyleDeclaration::setPropertyInternal() does:

    bool changed = m_propertySet->setProperty(propertyID, value, important, contextStyleSheet());

but as far as I can see, setProperty() returns true simply when parsing succeeded, not necessarily when the property changed.

This causes lots of extra style recalcs when scrolling Facebook.

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