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de93d90cda
Nothing in heap/ is called anymore, but it still has its claws deep into many of the base classes for the rest of Sky, so I've left the (largely unmodified) headers for now. We'll trim the headers further in later patches. R=abarth@chromium.org Review URL: https://codereview.chromium.org/681963002
83 lines
2.7 KiB
C++
83 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 MatchedPropertiesCache_h
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#define MatchedPropertiesCache_h
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#include "core/css/StylePropertySet.h"
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#include "core/css/resolver/MatchResult.h"
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#include "platform/Timer.h"
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#include "platform/heap/Handle.h"
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#include "wtf/Forward.h"
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#include "wtf/HashMap.h"
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#include "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 : public DummyBase<CachedMatchedProperties> {
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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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void trace(Visitor* visitor) { visitor->trace(matchedProperties); }
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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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void trace(Visitor*);
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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
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