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295f920116
I wrote a script to do this which is attached to the bug. TBR=abarth@chromium.org BUG=435361 Review URL: https://codereview.chromium.org/736373003
80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
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* Copyright (C) 2013 Google Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef SKY_ENGINE_CORE_CSS_RESOLVER_MATCHEDPROPERTIESCACHE_H_
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#define SKY_ENGINE_CORE_CSS_RESOLVER_MATCHEDPROPERTIESCACHE_H_
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#include "sky/engine/core/css/StylePropertySet.h"
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#include "sky/engine/core/css/resolver/MatchResult.h"
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#include "sky/engine/platform/Timer.h"
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#include "sky/engine/platform/heap/Handle.h"
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#include "sky/engine/wtf/Forward.h"
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#include "sky/engine/wtf/HashMap.h"
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#include "sky/engine/wtf/Noncopyable.h"
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namespace blink {
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class RenderStyle;
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class StyleResolverState;
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class CachedMatchedProperties final {
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public:
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Vector<MatchedProperties> matchedProperties;
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MatchRanges ranges;
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RefPtr<RenderStyle> renderStyle;
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RefPtr<RenderStyle> parentRenderStyle;
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void set(const RenderStyle*, const RenderStyle* parentStyle, const MatchResult&);
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void clear();
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};
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class MatchedPropertiesCache {
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DISALLOW_ALLOCATION();
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WTF_MAKE_NONCOPYABLE(MatchedPropertiesCache);
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public:
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MatchedPropertiesCache();
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const CachedMatchedProperties* find(unsigned hash, const StyleResolverState&, const MatchResult&);
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void add(const RenderStyle*, const RenderStyle* parentStyle, unsigned hash, const MatchResult&);
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void clear();
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void clearViewportDependent();
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static bool isCacheable(const Element*, const RenderStyle*, const RenderStyle* parentStyle);
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private:
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// Every N additions to the matched declaration cache trigger a sweep where entries holding
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// the last reference to a style declaration are garbage collected.
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void sweep(Timer<MatchedPropertiesCache>*);
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unsigned m_additionsSinceLastSweep;
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typedef HashMap<unsigned, OwnPtr<CachedMatchedProperties> > Cache;
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Timer<MatchedPropertiesCache> m_sweepTimer;
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Cache m_cache;
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};
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}
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#endif // SKY_ENGINE_CORE_CSS_RESOLVER_MATCHEDPROPERTIESCACHE_H_
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