Bug 78562 - New flexboxes don't split into columns
Summary: New flexboxes don't split into columns
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Layout and Rendering (show other bugs)
Version: 528+ (Nightly build)
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
Depends on:
Blocks: 62048
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Reported: 2012-02-13 18:43 PST by Ojan Vafai
Modified: 2012-02-15 16:47 PST (History)
2 users (show)

See Also:


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Description Ojan Vafai 2012-02-13 18:43:15 PST
RenderBlock* RenderBlock::createAnonymousBlockWithSameTypeAs(RenderBlock* otherAnonymousBlock) const
    if (otherAnonymousBlock->isAnonymousColumnsBlock())
        return createAnonymousColumnsBlock();
    if (otherAnonymousBlock->isAnonymousColumnSpanBlock())
        return createAnonymousColumnSpanBlock();
    return createAnonymousBlock(otherAnonymousBlock->style()->display() == BOX);
Comment 1 Ojan Vafai 2012-02-13 18:43:53 PST
As well as:
RenderBlock* RenderBlock::createAnonymousBlock(bool isFlexibleBox) const
    RefPtr<RenderStyle> newStyle = RenderStyle::createAnonymousStyle(style());

    RenderBlock* newBox = 0;
    if (isFlexibleBox) {
        newBox = new (renderArena()) RenderDeprecatedFlexibleBox(document() /* anonymous box */);
    } else {
        newBox = new (renderArena()) RenderBlock(document() /* anonymous box */);

    return newBox;
Comment 2 Ojan Vafai 2012-02-13 18:45:32 PST
And to round out the trio, RenderObject.h:
    bool isAnonymousBlock() const
        // This function is kept in sync with anonymous block creation conditions in
        // RenderBlock::createAnonymousBlock(). This includes creating an anonymous
        // RenderBlock having a BLOCK or BOX display. Other classes such as RenderTextFragment
        // are not RenderBlocks and will return false. See https://bugs.webkit.org/show_bug.cgi?id=56709. 
        return isAnonymous() && (style()->display() == BLOCK || style()->display() == BOX) && style()->styleType() == NOPSEUDO && isRenderBlock() && !isListMarker()
            && !isRenderFullScreen()
            && !isRenderFullScreenPlaceholder()
Comment 3 Ojan Vafai 2012-02-15 16:47:04 PST
We need createAnonymousBlock to create a RenderFlexibleBox when splitting flexboxes. This will get new flexboxes to match the old ones. Old flexboxes are all sorts of buggy in multi-column though.