60 lines
2.7 KiB
C++
60 lines
2.7 KiB
C++
/*
|
|
* 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"
|
|
|
|
namespace WebCore {
|
|
|
|
class RenderBlockFlow;
|
|
class RenderMultiColumnFlow;
|
|
|
|
class RenderTreeBuilder::MultiColumn {
|
|
WTF_MAKE_FAST_ALLOCATED;
|
|
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(const RenderElement& container, RenderMultiColumnFlow&);
|
|
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;
|
|
};
|
|
|
|
}
|