1/* 2 * Copyright (C) 2011 Google 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'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25#ifndef DeprecatedStyleBuilder_h 26#define DeprecatedStyleBuilder_h 27 28#include "CSSPropertyNames.h" 29#include "StylePropertyShorthand.h" 30#include <wtf/PassRefPtr.h> 31#include <wtf/RefCounted.h> 32 33namespace WebCore { 34 35class CSSValue; 36class DeprecatedStyleBuilder; 37class StyleResolver; 38 39class PropertyHandler { 40public: 41 typedef void (*InheritFunction)(CSSPropertyID, StyleResolver*); 42 typedef void (*InitialFunction)(CSSPropertyID, StyleResolver*); 43 typedef void (*ApplyFunction)(CSSPropertyID, StyleResolver*, CSSValue*); 44 PropertyHandler() : m_inherit(0), m_initial(0), m_apply(0) { } 45 PropertyHandler(InheritFunction inherit, InitialFunction initial, ApplyFunction apply) : m_inherit(inherit), m_initial(initial), m_apply(apply) { } 46 void applyInheritValue(CSSPropertyID propertyID, StyleResolver* styleResolver) const { ASSERT(m_inherit); (*m_inherit)(propertyID, styleResolver); } 47 void applyInitialValue(CSSPropertyID propertyID, StyleResolver* styleResolver) const { ASSERT(m_initial); (*m_initial)(propertyID, styleResolver); } 48 void applyValue(CSSPropertyID propertyID, StyleResolver* styleResolver, CSSValue* value) const { ASSERT(m_apply); (*m_apply)(propertyID, styleResolver, value); } 49 bool isValid() const { return m_inherit && m_initial && m_apply; } 50 InheritFunction inheritFunction() const { return m_inherit; } 51 InitialFunction initialFunction() { return m_initial; } 52 ApplyFunction applyFunction() { return m_apply; } 53private: 54 InheritFunction m_inherit; 55 InitialFunction m_initial; 56 ApplyFunction m_apply; 57}; 58 59class DeprecatedStyleBuilder { 60 WTF_MAKE_NONCOPYABLE(DeprecatedStyleBuilder); WTF_MAKE_FAST_ALLOCATED; 61public: 62 static const DeprecatedStyleBuilder& sharedStyleBuilder(); 63 64 const PropertyHandler& propertyHandler(CSSPropertyID property) const 65 { 66 ASSERT(valid(property)); 67 return m_propertyMap[index(property)]; 68 } 69private: 70 DeprecatedStyleBuilder(); 71 static int index(CSSPropertyID property) 72 { 73 return property - firstCSSProperty; 74 } 75 76 static bool valid(CSSPropertyID property) 77 { 78 int i = index(property); 79 return i >= 0 && i < numCSSProperties; 80 } 81 82 void setPropertyHandler(CSSPropertyID property, const PropertyHandler& handler) 83 { 84 ASSERT(valid(property)); 85 ASSERT(!propertyHandler(property).isValid()); 86 ASSERT_WITH_MESSAGE(!isExpandedShorthand(property), "Shorthand property id = %d shouldn't be inserted into StyleBuilder. Shorthands should be expanded at parsing time.", property); 87 m_propertyMap[index(property)] = handler; 88 } 89 90 void setPropertyHandler(CSSPropertyID newProperty, CSSPropertyID equivalentProperty) 91 { 92 ASSERT(valid(newProperty)); 93 ASSERT(valid(equivalentProperty)); 94 ASSERT(!propertyHandler(newProperty).isValid()); 95 ASSERT_WITH_MESSAGE(!isExpandedShorthand(newProperty), "Shorthand property id = %d shouldn't be inserted into StyleBuilder. Shorthands should be expanded at parsing time.", newProperty); 96 ASSERT_WITH_MESSAGE(!isExpandedShorthand(equivalentProperty), "Shorthand property id = %d shouldn't be inserted into StyleBuilder. Shorthands should be expanded at parsing time.", equivalentProperty); 97 m_propertyMap[index(newProperty)] = m_propertyMap[index(equivalentProperty)]; 98 } 99 100 PropertyHandler m_propertyMap[numCSSProperties]; 101}; 102 103} 104 105#endif // DeprecatedStyleBuilder_h 106