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      1 /*
      2  * Copyright (C) 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 COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef PropertySetCSSStyleDeclaration_h
     27 #define PropertySetCSSStyleDeclaration_h
     28 
     29 #include "core/css/CSSStyleDeclaration.h"
     30 #include "wtf/HashMap.h"
     31 #include "wtf/OwnPtr.h"
     32 
     33 namespace WebCore {
     34 
     35 class CSSProperty;
     36 class CSSRule;
     37 class CSSValue;
     38 class Element;
     39 class ExceptionState;
     40 class MutableStylePropertySet;
     41 class StyleSheetContents;
     42 
     43 class AbstractPropertySetCSSStyleDeclaration : public CSSStyleDeclaration {
     44 public:
     45     virtual Element* parentElement() const { return 0; }
     46     StyleSheetContents* contextStyleSheet() const;
     47 
     48     virtual void trace(Visitor*) OVERRIDE;
     49 
     50 private:
     51     virtual CSSRule* parentRule() const OVERRIDE { return 0; }
     52     virtual unsigned length() const OVERRIDE FINAL;
     53     virtual String item(unsigned index) const OVERRIDE FINAL;
     54     virtual PassRefPtrWillBeRawPtr<CSSValue> getPropertyCSSValue(const String& propertyName) OVERRIDE FINAL;
     55     virtual String getPropertyValue(const String& propertyName) OVERRIDE FINAL;
     56     virtual String getPropertyPriority(const String& propertyName) OVERRIDE FINAL;
     57     virtual String getPropertyShorthand(const String& propertyName) OVERRIDE FINAL;
     58     virtual bool isPropertyImplicit(const String& propertyName) OVERRIDE FINAL;
     59     virtual void setProperty(const String& propertyName, const String& value, const String& priority, ExceptionState&) OVERRIDE FINAL;
     60     virtual String removeProperty(const String& propertyName, ExceptionState&) OVERRIDE FINAL;
     61     virtual String cssText() const OVERRIDE FINAL;
     62     virtual void setCSSText(const String&, ExceptionState&) OVERRIDE FINAL;
     63     virtual PassRefPtrWillBeRawPtr<CSSValue> getPropertyCSSValueInternal(CSSPropertyID) OVERRIDE FINAL;
     64     virtual String getPropertyValueInternal(CSSPropertyID) OVERRIDE FINAL;
     65     virtual void setPropertyInternal(CSSPropertyID, const String& value, bool important, ExceptionState&) OVERRIDE FINAL;
     66 
     67     virtual bool cssPropertyMatches(CSSPropertyID, const CSSValue*) const OVERRIDE FINAL;
     68     virtual PassRefPtrWillBeRawPtr<MutableStylePropertySet> copyProperties() const OVERRIDE FINAL;
     69 
     70     CSSValue* cloneAndCacheForCSSOM(CSSValue*);
     71 
     72 protected:
     73     enum MutationType { NoChanges, PropertyChanged };
     74     virtual void willMutate() { }
     75     virtual void didMutate(MutationType) { }
     76     virtual MutableStylePropertySet& propertySet() const = 0;
     77 
     78     OwnPtrWillBeMember<WillBeHeapHashMap<RawPtrWillBeMember<CSSValue>, RefPtrWillBeMember<CSSValue> > > m_cssomCSSValueClones;
     79 };
     80 
     81 class PropertySetCSSStyleDeclaration : public AbstractPropertySetCSSStyleDeclaration {
     82 public:
     83     PropertySetCSSStyleDeclaration(MutableStylePropertySet& propertySet) : m_propertySet(&propertySet) { }
     84 
     85 #if !ENABLE(OILPAN)
     86     virtual void ref() OVERRIDE;
     87     virtual void deref() OVERRIDE;
     88 #endif
     89 
     90     virtual void trace(Visitor*) OVERRIDE;
     91 
     92 protected:
     93     virtual MutableStylePropertySet& propertySet() const OVERRIDE FINAL { ASSERT(m_propertySet); return *m_propertySet; }
     94 
     95     RawPtrWillBeMember<MutableStylePropertySet> m_propertySet; // Cannot be null
     96 };
     97 
     98 class StyleRuleCSSStyleDeclaration FINAL : public PropertySetCSSStyleDeclaration
     99 {
    100 public:
    101     static PassRefPtrWillBeRawPtr<StyleRuleCSSStyleDeclaration> create(MutableStylePropertySet& propertySet, CSSRule* parentRule)
    102     {
    103         return adoptRefWillBeNoop(new StyleRuleCSSStyleDeclaration(propertySet, parentRule));
    104     }
    105 
    106 #if !ENABLE(OILPAN)
    107     void clearParentRule() { m_parentRule = nullptr; }
    108 
    109     virtual void ref() OVERRIDE;
    110     virtual void deref() OVERRIDE;
    111 #endif
    112 
    113     void reattach(MutableStylePropertySet&);
    114 
    115     virtual void trace(Visitor*) OVERRIDE;
    116 
    117 private:
    118     StyleRuleCSSStyleDeclaration(MutableStylePropertySet&, CSSRule*);
    119     virtual ~StyleRuleCSSStyleDeclaration();
    120 
    121     virtual CSSStyleSheet* parentStyleSheet() const OVERRIDE;
    122 
    123     virtual CSSRule* parentRule() const OVERRIDE { return m_parentRule;  }
    124 
    125     virtual void willMutate() OVERRIDE;
    126     virtual void didMutate(MutationType) OVERRIDE;
    127 
    128 #if !ENABLE(OILPAN)
    129     unsigned m_refCount;
    130 #endif
    131     RawPtrWillBeMember<CSSRule> m_parentRule;
    132 };
    133 
    134 class InlineCSSStyleDeclaration FINAL : public AbstractPropertySetCSSStyleDeclaration
    135 {
    136 public:
    137     explicit InlineCSSStyleDeclaration(Element* parentElement)
    138         : m_parentElement(parentElement)
    139     {
    140     }
    141 
    142     virtual void trace(Visitor*) OVERRIDE;
    143 
    144 private:
    145     virtual MutableStylePropertySet& propertySet() const OVERRIDE;
    146 #if !ENABLE(OILPAN)
    147     virtual void ref() OVERRIDE;
    148     virtual void deref() OVERRIDE;
    149 #endif
    150     virtual CSSStyleSheet* parentStyleSheet() const OVERRIDE;
    151     virtual Element* parentElement() const OVERRIDE { return m_parentElement; }
    152 
    153     virtual void didMutate(MutationType) OVERRIDE;
    154 
    155     RawPtrWillBeMember<Element> m_parentElement;
    156 };
    157 
    158 } // namespace WebCore
    159 
    160 #endif
    161