Bug 265099 – Fix setPreferredLogicalWidthsDirty when a RenderObject is already dirty

• Component: Layout and Rendering
• Status: NEW

[Ahmad Saleem]

Hi Team,

Just wanted to raise to get input, whether it is something can leads to any issue in 'WebKit' world:

Blink Commit: https://chromium.googlesource.com/chromium/blink/+/5a6a045684108c19541eb9db437e612e4be419fe

"Previously, RenderObject::setPreferredLogicalWidthsDirty with
MarkingBehavior=MarkContainingBlockChain would not dirty its ancestors
if the RenderObject was already marked as dirty. This patch fixes this
bug by ignoring whether the RenderObject was already marked as dirty."

WebKit Source: https://searchfox.org/wubkat/rev/114aa2c8594807cbc34dd5dff48a9e2addfd1e00/Source/WebCore/rendering/RenderObject.cpp#633

___________

Current:

void RenderObject::setPreferredLogicalWidthsDirty(bool shouldBeDirty, MarkingBehavior markParents)
{
    bool alreadyDirty = preferredLogicalWidthsDirty();
    m_bitfields.setPreferredLogicalWidthsDirty(shouldBeDirty);
    if (shouldBeDirty && !alreadyDirty && markParents == MarkContainingBlockChain && (isRenderText() || !style().hasOutOfFlowPosition()))
        invalidateContainerPreferredLogicalWidths();
}

To:

void RenderObject::setPreferredLogicalWidthsDirty(bool shouldBeDirty, MarkingBehavior markParents)
{
    m_bitfields.setPreferredLogicalWidthsDirty(shouldBeDirty);
    if (shouldBeDirty && markParents == MarkContainingBlockChain && (isRenderText() || !style().hasOutOfFlowPosition()))
        invalidateContainerPreferredLogicalWidths();
}

____

This compiles but I didn't run any test case except 'cached-change-tbody-border-width.html' and it fails with differences.

Just wanted to raise to get input.

Thanks!

[Radar WebKit Bug Importer]

<rdar://problem/118795843>