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/*
* Copyright (C) 2011, 2012 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.
*/
#ifndef CSSValuePool_h
#define CSSValuePool_h
#include "core/CSSPropertyNames.h"
#include "core/CSSValueKeywords.h"
#include "core/CoreExport.h"
#include "core/css/CSSColorValue.h"
#include "core/css/CSSCustomIdentValue.h"
#include "core/css/CSSFontFamilyValue.h"
#include "core/css/CSSIdentifierValue.h"
#include "core/css/CSSInheritedValue.h"
#include "core/css/CSSInitialValue.h"
#include "core/css/CSSPrimitiveValue.h"
#include "core/css/CSSUnsetValue.h"
#include "core/css/CSSValueList.h"
#include "wtf/HashMap.h"
#include "wtf/RefPtr.h"
#include "wtf/text/AtomicStringHash.h"
namespace blink {
class CORE_EXPORT CSSValuePool
: public GarbageCollectedFinalized<CSSValuePool> {
WTF_MAKE_NONCOPYABLE(CSSValuePool);
public:
// TODO(sashab): Make all the value pools store const CSSValues.
static const int maximumCacheableIntegerValue = 255;
using ColorValueCache = HeapHashMap<unsigned, Member<CSSColorValue>>;
static const unsigned maximumColorCacheSize = 512;
using FontFaceValueCache =
HeapHashMap<AtomicString, Member<const CSSValueList>>;
static const unsigned maximumFontFaceCacheSize = 128;
using FontFamilyValueCache = HeapHashMap<String, Member<CSSFontFamilyValue>>;
// Cached individual values.
CSSColorValue* transparentColor() { return m_colorTransparent; }
CSSColorValue* whiteColor() { return m_colorWhite; }
CSSColorValue* blackColor() { return m_colorBlack; }
CSSInheritedValue* inheritedValue() { return m_inheritedValue; }
CSSInitialValue* initialValue() { return m_initialValue; }
CSSUnsetValue* unsetValue() { return m_unsetValue; }
// Vector caches.
CSSIdentifierValue* identifierCacheValue(CSSValueID ident) {
return m_identifierValueCache[ident];
}
CSSIdentifierValue* setIdentifierCacheValue(CSSValueID ident,
CSSIdentifierValue* cssValue) {
return m_identifierValueCache[ident] = cssValue;
}
CSSPrimitiveValue* pixelCacheValue(int intValue) {
return m_pixelValueCache[intValue];
}
CSSPrimitiveValue* setPixelCacheValue(int intValue,
CSSPrimitiveValue* cssValue) {
return m_pixelValueCache[intValue] = cssValue;
}
CSSPrimitiveValue* percentCacheValue(int intValue) {
return m_percentValueCache[intValue];
}
CSSPrimitiveValue* setPercentCacheValue(int intValue,
CSSPrimitiveValue* cssValue) {
return m_percentValueCache[intValue] = cssValue;
}
CSSPrimitiveValue* numberCacheValue(int intValue) {
return m_numberValueCache[intValue];
}
CSSPrimitiveValue* setNumberCacheValue(int intValue,
CSSPrimitiveValue* cssValue) {
return m_numberValueCache[intValue] = cssValue;
}
// Hash map caches.
ColorValueCache::AddResult getColorCacheEntry(RGBA32 rgbValue) {
// Just wipe out the cache and start rebuilding if it gets too big.
if (m_colorValueCache.size() > maximumColorCacheSize)
m_colorValueCache.clear();
return m_colorValueCache.add(rgbValue, nullptr);
}
FontFamilyValueCache::AddResult getFontFamilyCacheEntry(
const String& familyName) {
return m_fontFamilyValueCache.add(familyName, nullptr);
}
FontFaceValueCache::AddResult getFontFaceCacheEntry(
const AtomicString& string) {
// Just wipe out the cache and start rebuilding if it gets too big.
if (m_fontFaceValueCache.size() > maximumFontFaceCacheSize)
m_fontFaceValueCache.clear();
return m_fontFaceValueCache.add(string, nullptr);
}
DECLARE_TRACE();
private:
CSSValuePool();
// Cached individual values.
Member<CSSInheritedValue> m_inheritedValue;
Member<CSSInitialValue> m_initialValue;
Member<CSSUnsetValue> m_unsetValue;
Member<CSSColorValue> m_colorTransparent;
Member<CSSColorValue> m_colorWhite;
Member<CSSColorValue> m_colorBlack;
// Vector caches.
HeapVector<Member<CSSIdentifierValue>, numCSSValueKeywords>
m_identifierValueCache;
HeapVector<Member<CSSPrimitiveValue>, maximumCacheableIntegerValue + 1>
m_pixelValueCache;
HeapVector<Member<CSSPrimitiveValue>, maximumCacheableIntegerValue + 1>
m_percentValueCache;
HeapVector<Member<CSSPrimitiveValue>, maximumCacheableIntegerValue + 1>
m_numberValueCache;
// Hash map caches.
ColorValueCache m_colorValueCache;
FontFaceValueCache m_fontFaceValueCache;
FontFamilyValueCache m_fontFamilyValueCache;
friend CORE_EXPORT CSSValuePool& cssValuePool();
};
CORE_EXPORT CSSValuePool& cssValuePool();
} // namespace blink
#endif
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