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/*
* Copyright (C) 2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "RenderTreeBuilder.h"
#include <wtf/TZoneMalloc.h>
namespace WebCore {
class RenderBlockFlow;
class RenderMultiColumnFlow;
class RenderTreeBuilder::MultiColumn {
WTF_MAKE_TZONE_ALLOCATED(MultiColumn);
public:
MultiColumn(RenderTreeBuilder&);
void updateAfterDescendants(RenderBlockFlow&);
// Some renderers (column spanners) are moved out of the flow thread to live among column
// sets. If |child| is such a renderer, resolve it to the placeholder that lives at the original
// location in the tree.
RenderObject* resolveMovedChild(RenderFragmentedFlow& enclosingFragmentedFlow, RenderObject* beforeChild);
void restoreColumnSpannersForContainer(RenderMultiColumnFlow&, const RenderElement& container);
void multiColumnDescendantInserted(RenderMultiColumnFlow&, RenderObject& newDescendant);
void multiColumnRelativeWillBeRemoved(RenderMultiColumnFlow&, RenderObject& relative, RenderTreeBuilder::CanCollapseAnonymousBlock);
static RenderObject* adjustBeforeChildForMultiColumnSpannerIfNeeded(RenderObject& beforeChild);
private:
void createFragmentedFlow(RenderBlockFlow&);
void destroyFragmentedFlow(RenderBlockFlow&);
RenderObject* processPossibleSpannerDescendant(RenderMultiColumnFlow&, RenderObject*& subtreeRoot, RenderObject& descendant);
void handleSpannerRemoval(RenderMultiColumnFlow&, RenderObject& spanner, RenderTreeBuilder::CanCollapseAnonymousBlock);
RenderTreeBuilder& m_builder;
};
}
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