1/*
2 * Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef CSSValuePool_h
27#define CSSValuePool_h
28
29#include "core/CSSPropertyNames.h"
30#include "core/CSSValueKeywords.h"
31#include "core/css/CSSInheritedValue.h"
32#include "core/css/CSSInitialValue.h"
33#include "core/css/CSSPrimitiveValue.h"
34#include "wtf/HashMap.h"
35#include "wtf/RefPtr.h"
36#include "wtf/text/AtomicStringHash.h"
37
38namespace blink {
39
40class CSSValueList;
41
42class CSSValuePool :  public NoBaseWillBeGarbageCollected<CSSValuePool> {
43    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
44public:
45    PassRefPtrWillBeRawPtr<CSSValueList> createFontFaceValue(const AtomicString&);
46    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createFontFamilyValue(const String&);
47    PassRefPtrWillBeRawPtr<CSSInheritedValue> createInheritedValue() { return m_inheritedValue; }
48    PassRefPtrWillBeRawPtr<CSSInitialValue> createImplicitInitialValue() { return m_implicitInitialValue; }
49    PassRefPtrWillBeRawPtr<CSSInitialValue> createExplicitInitialValue() { return m_explicitInitialValue; }
50    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createIdentifierValue(CSSValueID identifier);
51    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createIdentifierValue(CSSPropertyID identifier);
52    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createColorValue(unsigned rgbValue);
53    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createValue(double value, CSSPrimitiveValue::UnitType);
54    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createValue(const String& value, CSSPrimitiveValue::UnitType type) { return CSSPrimitiveValue::create(value, type); }
55    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createValue(const Length& value, const RenderStyle&);
56    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createValue(const Length& value, float zoom) { return CSSPrimitiveValue::create(value, zoom); }
57    template<typename T> static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createValue(T value) { return CSSPrimitiveValue::create(value); }
58
59    void trace(Visitor*);
60
61private:
62    CSSValuePool();
63
64    RefPtrWillBeMember<CSSInheritedValue> m_inheritedValue;
65    RefPtrWillBeMember<CSSInitialValue> m_implicitInitialValue;
66    RefPtrWillBeMember<CSSInitialValue> m_explicitInitialValue;
67
68    WillBeHeapVector<RefPtrWillBeMember<CSSPrimitiveValue>, numCSSValueKeywords> m_identifierValueCache;
69
70    typedef WillBeHeapHashMap<unsigned, RefPtrWillBeMember<CSSPrimitiveValue> > ColorValueCache;
71    ColorValueCache m_colorValueCache;
72    RefPtrWillBeMember<CSSPrimitiveValue> m_colorTransparent;
73    RefPtrWillBeMember<CSSPrimitiveValue> m_colorWhite;
74    RefPtrWillBeMember<CSSPrimitiveValue> m_colorBlack;
75
76    static const int maximumCacheableIntegerValue = 255;
77
78    WillBeHeapVector<RefPtrWillBeMember<CSSPrimitiveValue>, maximumCacheableIntegerValue + 1> m_pixelValueCache;
79    WillBeHeapVector<RefPtrWillBeMember<CSSPrimitiveValue>, maximumCacheableIntegerValue + 1> m_percentValueCache;
80    WillBeHeapVector<RefPtrWillBeMember<CSSPrimitiveValue>, maximumCacheableIntegerValue + 1> m_numberValueCache;
81
82    typedef WillBeHeapHashMap<AtomicString, RefPtrWillBeMember<CSSValueList> > FontFaceValueCache;
83    FontFaceValueCache m_fontFaceValueCache;
84
85    typedef WillBeHeapHashMap<String, RefPtrWillBeMember<CSSPrimitiveValue> > FontFamilyValueCache;
86    FontFamilyValueCache m_fontFamilyValueCache;
87
88    friend CSSValuePool& cssValuePool();
89};
90
91CSSValuePool& cssValuePool();
92
93}
94
95#endif
96