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71 lines
2.6 KiB
C++
71 lines
2.6 KiB
C++
/*
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* Copyright (C) 2010 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKY_ENGINE_CORE_RENDERING_VERTICALPOSITIONCACHE_H_
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#define SKY_ENGINE_CORE_RENDERING_VERTICALPOSITIONCACHE_H_
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#include "flutter/sky/engine/platform/fonts/FontBaseline.h"
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#include "flutter/sky/engine/wtf/HashMap.h"
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namespace blink {
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class RenderObject;
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// Values for vertical alignment.
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const int PositionUndefined = 0x80000000;
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class VerticalPositionCache {
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WTF_MAKE_NONCOPYABLE(VerticalPositionCache);
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public:
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VerticalPositionCache() {}
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int get(RenderObject* renderer, FontBaseline baselineType) const {
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const HashMap<RenderObject*, int>& mapToCheck =
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baselineType == AlphabeticBaseline ? m_alphabeticPositions
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: m_ideographicPositions;
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const HashMap<RenderObject*, int>::const_iterator it =
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mapToCheck.find(renderer);
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if (it == mapToCheck.end())
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return PositionUndefined;
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return it->value;
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}
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void set(RenderObject* renderer, FontBaseline baselineType, int position) {
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if (baselineType == AlphabeticBaseline)
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m_alphabeticPositions.set(renderer, position);
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else
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m_ideographicPositions.set(renderer, position);
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}
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private:
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HashMap<RenderObject*, int> m_alphabeticPositions;
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HashMap<RenderObject*, int> m_ideographicPositions;
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};
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} // namespace blink
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#endif // SKY_ENGINE_CORE_RENDERING_VERTICALPOSITIONCACHE_H_
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