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 "CSSPropertyNames.h"
30#include "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 WebCore {
39
40class CSSValueList;
41
42class CSSValuePool {
43    WTF_MAKE_FAST_ALLOCATED;
44public:
45    PassRefPtr<CSSValueList> createFontFaceValue(const AtomicString&);
46    PassRefPtr<CSSPrimitiveValue> createFontFamilyValue(const String&);
47    PassRefPtr<CSSInheritedValue> createInheritedValue() { return m_inheritedValue; }
48    PassRefPtr<CSSInitialValue> createImplicitInitialValue() { return m_implicitInitialValue; }
49    PassRefPtr<CSSInitialValue> createExplicitInitialValue() { return m_explicitInitialValue; }
50    PassRefPtr<CSSPrimitiveValue> createIdentifierValue(CSSValueID identifier);
51    PassRefPtr<CSSPrimitiveValue> createIdentifierValue(CSSPropertyID identifier);
52    PassRefPtr<CSSPrimitiveValue> createColorValue(unsigned rgbValue);
53    PassRefPtr<CSSPrimitiveValue> createValue(double value, CSSPrimitiveValue::UnitTypes);
54    PassRefPtr<CSSPrimitiveValue> createValue(const String& value, CSSPrimitiveValue::UnitTypes type) { return CSSPrimitiveValue::create(value, type); }
55    PassRefPtr<CSSPrimitiveValue> createValue(const Length& value, const RenderStyle&);
56    PassRefPtr<CSSPrimitiveValue> createValue(const Length& value, float zoom) { return CSSPrimitiveValue::create(value, zoom); }
57    template<typename T> static PassRefPtr<CSSPrimitiveValue> createValue(T value) { return CSSPrimitiveValue::create(value); }
58
59private:
60    CSSValuePool();
61
62    RefPtr<CSSInheritedValue> m_inheritedValue;
63    RefPtr<CSSInitialValue> m_implicitInitialValue;
64    RefPtr<CSSInitialValue> m_explicitInitialValue;
65
66    RefPtr<CSSPrimitiveValue> m_identifierValueCache[numCSSValueKeywords];
67
68    typedef HashMap<unsigned, RefPtr<CSSPrimitiveValue> > ColorValueCache;
69    ColorValueCache m_colorValueCache;
70    RefPtr<CSSPrimitiveValue> m_colorTransparent;
71    RefPtr<CSSPrimitiveValue> m_colorWhite;
72    RefPtr<CSSPrimitiveValue> m_colorBlack;
73
74    static const int maximumCacheableIntegerValue = 255;
75
76    RefPtr<CSSPrimitiveValue> m_pixelValueCache[maximumCacheableIntegerValue + 1];
77    RefPtr<CSSPrimitiveValue> m_percentValueCache[maximumCacheableIntegerValue + 1];
78    RefPtr<CSSPrimitiveValue> m_numberValueCache[maximumCacheableIntegerValue + 1];
79
80    typedef HashMap<AtomicString, RefPtr<CSSValueList> > FontFaceValueCache;
81    FontFaceValueCache m_fontFaceValueCache;
82
83    typedef HashMap<String, RefPtr<CSSPrimitiveValue> > FontFamilyValueCache;
84    FontFamilyValueCache m_fontFamilyValueCache;
85
86    friend CSSValuePool& cssValuePool();
87};
88
89CSSValuePool& cssValuePool();
90
91}
92
93#endif
94