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/*
* Copyright (C) 2013 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#pragma once
namespace WebCore {
class RenderBlock;
class LogicalSelectionOffsetCaches {
public:
class ContainingBlockInfo {
public:
ContainingBlockInfo()
: m_hasFloatsOrFragmentedFlows(false)
, m_cachedLogicalLeftSelectionOffset(false)
, m_cachedLogicalRightSelectionOffset(false)
{ }
inline void setBlock(RenderBlock*, const LogicalSelectionOffsetCaches*, bool parentCacheHasFloatsOrFragmentedFlows = false);
inline LayoutUnit logicalLeftSelectionOffset(RenderBlock&, LayoutUnit) const;
inline LayoutUnit logicalRightSelectionOffset(RenderBlock&, LayoutUnit) const;
RenderBlock* block() const { return m_block; }
const LogicalSelectionOffsetCaches* cache() const { return m_cache; }
bool hasFloatsOrFragmentedFlows() const { return m_hasFloatsOrFragmentedFlows; }
private:
RenderBlock* m_block { nullptr };
const LogicalSelectionOffsetCaches* m_cache { nullptr };
bool m_hasFloatsOrFragmentedFlows : 1;
mutable bool m_cachedLogicalLeftSelectionOffset : 1;
mutable bool m_cachedLogicalRightSelectionOffset : 1;
mutable LayoutUnit m_logicalLeftSelectionOffset;
mutable LayoutUnit m_logicalRightSelectionOffset;
};
inline explicit LogicalSelectionOffsetCaches(RenderBlock&);
inline LogicalSelectionOffsetCaches(RenderBlock&, const LogicalSelectionOffsetCaches&);
inline const ContainingBlockInfo& containingBlockInfo(RenderBlock&) const;
private:
ContainingBlockInfo m_containingBlockForFixedPosition;
ContainingBlockInfo m_containingBlockForAbsolutePosition;
ContainingBlockInfo m_containingBlockForInflowPosition;
};
} // namespace WebCore
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