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27 #include "core/css/CSSValuePool.h"
29 #include "core/css/parser/BisonCSSParser.h"
30 #include "core/css/CSSValueList.h"
31 #include "core/rendering/style/RenderStyle.h"
35 CSSValuePool& cssValuePool()
38 DEFINE_STATIC_LOCAL(Persistent<CSSValuePool>, pool, (new CSSValuePool()));
41 DEFINE_STATIC_LOCAL(CSSValuePool, pool, ());
43 #endif // ENABLE(OILPAN)
46 CSSValuePool::CSSValuePool()
47 : m_inheritedValue(CSSInheritedValue::create())
48 , m_implicitInitialValue(CSSInitialValue::createImplicit())
49 , m_explicitInitialValue(CSSInitialValue::createExplicit())
50 , m_colorTransparent(CSSPrimitiveValue::createColor(Color::transparent))
51 , m_colorWhite(CSSPrimitiveValue::createColor(Color::white))
52 , m_colorBlack(CSSPrimitiveValue::createColor(Color::black))
54 m_identifierValueCache.resize(numCSSValueKeywords);
55 m_pixelValueCache.resize(maximumCacheableIntegerValue + 1);
56 m_percentValueCache.resize(maximumCacheableIntegerValue + 1);
57 m_numberValueCache.resize(maximumCacheableIntegerValue + 1);
60 PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSValuePool::createIdentifierValue(CSSValueID ident)
63 return CSSPrimitiveValue::createIdentifier(ident);
65 if (!m_identifierValueCache[ident])
66 m_identifierValueCache[ident] = CSSPrimitiveValue::createIdentifier(ident);
67 return m_identifierValueCache[ident];
70 PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSValuePool::createIdentifierValue(CSSPropertyID ident)
72 return CSSPrimitiveValue::createIdentifier(ident);
75 PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSValuePool::createColorValue(unsigned rgbValue)
77 // These are the empty and deleted values of the hash table.
78 if (rgbValue == Color::transparent)
79 return m_colorTransparent;
80 if (rgbValue == Color::white)
82 // Just because it is common.
83 if (rgbValue == Color::black)
86 // Just wipe out the cache and start rebuilding if it gets too big.
87 const unsigned maximumColorCacheSize = 512;
88 if (m_colorValueCache.size() > maximumColorCacheSize)
89 m_colorValueCache.clear();
91 RefPtrWillBeRawPtr<CSSPrimitiveValue> dummyValue = nullptr;
92 ColorValueCache::AddResult entry = m_colorValueCache.add(rgbValue, dummyValue);
94 entry.storedValue->value = CSSPrimitiveValue::createColor(rgbValue);
95 return entry.storedValue->value;
98 PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSValuePool::createValue(double value, CSSPrimitiveValue::UnitTypes type)
100 if (std::isinf(value))
103 if (value < 0 || value > maximumCacheableIntegerValue)
104 return CSSPrimitiveValue::create(value, type);
106 int intValue = static_cast<int>(value);
107 if (value != intValue)
108 return CSSPrimitiveValue::create(value, type);
111 case CSSPrimitiveValue::CSS_PX:
112 if (!m_pixelValueCache[intValue])
113 m_pixelValueCache[intValue] = CSSPrimitiveValue::create(value, type);
114 return m_pixelValueCache[intValue];
115 case CSSPrimitiveValue::CSS_PERCENTAGE:
116 if (!m_percentValueCache[intValue])
117 m_percentValueCache[intValue] = CSSPrimitiveValue::create(value, type);
118 return m_percentValueCache[intValue];
119 case CSSPrimitiveValue::CSS_NUMBER:
120 if (!m_numberValueCache[intValue])
121 m_numberValueCache[intValue] = CSSPrimitiveValue::create(value, type);
122 return m_numberValueCache[intValue];
124 return CSSPrimitiveValue::create(value, type);
128 PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSValuePool::createValue(const Length& value, const RenderStyle& style)
130 return CSSPrimitiveValue::create(value, style.effectiveZoom());
133 PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSValuePool::createFontFamilyValue(const String& familyName)
135 RefPtrWillBeMember<CSSPrimitiveValue>& value = m_fontFamilyValueCache.add(familyName, nullptr).storedValue->value;
137 value = CSSPrimitiveValue::create(familyName, CSSPrimitiveValue::CSS_STRING);
141 PassRefPtrWillBeRawPtr<CSSValueList> CSSValuePool::createFontFaceValue(const AtomicString& string)
143 // Just wipe out the cache and start rebuilding if it gets too big.
144 const unsigned maximumFontFaceCacheSize = 128;
145 if (m_fontFaceValueCache.size() > maximumFontFaceCacheSize)
146 m_fontFaceValueCache.clear();
148 RefPtrWillBeMember<CSSValueList>& value = m_fontFaceValueCache.add(string, nullptr).storedValue->value;
150 value = BisonCSSParser::parseFontFaceValue(string);
154 void CSSValuePool::trace(Visitor* visitor)
156 visitor->trace(m_inheritedValue);
157 visitor->trace(m_implicitInitialValue);
158 visitor->trace(m_explicitInitialValue);
159 visitor->trace(m_identifierValueCache);
160 visitor->trace(m_colorValueCache);
161 visitor->trace(m_colorTransparent);
162 visitor->trace(m_colorWhite);
163 visitor->trace(m_colorBlack);
164 visitor->trace(m_pixelValueCache);
165 visitor->trace(m_percentValueCache);
166 visitor->trace(m_numberValueCache);
167 visitor->trace(m_fontFaceValueCache);
168 visitor->trace(m_fontFamilyValueCache);