third_party/WebKit/Source/core/css/StyleRule.h - chromium/src - Git at Google

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2006, 2008, 2012, 2013 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */

 #ifndef StyleRule_h
 #define StyleRule_h

 #include "core/CoreExport.h"
 #include "core/css/CSSSelectorList.h"
 #include "core/css/MediaList.h"
 #include "core/css/StylePropertySet.h"
 #include "platform/heap/Handle.h"
 #include "wtf/RefPtr.h"

 namespace blink {

 class CSSRule;
 class CSSStyleSheet;

 class CORE_EXPORT StyleRuleBase : public RefCountedWillBeGarbageCollectedFinalized<StyleRuleBase> {
     USING_FAST_MALLOC_WILL_BE_REMOVED(StyleRuleBase);
 public:
     enum Type {
         Charset,
         Style,
         Import,
         Media,
         FontFace,
         Page,
         Keyframes,
         Keyframe,
         Namespace,
         Supports,
         Viewport,
     };

     Type type() const { return static_cast<Type>(m_type); }

     bool isCharsetRule() const { return type() == Charset; }
     bool isFontFaceRule() const { return type() == FontFace; }
     bool isKeyframesRule() const { return type() == Keyframes; }
     bool isKeyframeRule() const { return type() == Keyframe; }
     bool isNamespaceRule() const { return type() == Namespace; }
     bool isMediaRule() const { return type() == Media; }
     bool isPageRule() const { return type() == Page; }
     bool isStyleRule() const { return type() == Style; }
     bool isSupportsRule() const { return type() == Supports; }
     bool isViewportRule() const { return type() == Viewport; }
     bool isImportRule() const { return type() == Import; }

     PassRefPtrWillBeRawPtr<StyleRuleBase> copy() const;

 #if !ENABLE(OILPAN)
     void deref()
     {
         if (derefBase())
             destroy();
     }
 #endif // !ENABLE(OILPAN)

     // FIXME: There shouldn't be any need for the null parent version.
     PassRefPtrWillBeRawPtr<CSSRule> createCSSOMWrapper(CSSStyleSheet* parentSheet = 0) const;
     PassRefPtrWillBeRawPtr<CSSRule> createCSSOMWrapper(CSSRule* parentRule) const;

     DECLARE_TRACE();
     DEFINE_INLINE_TRACE_AFTER_DISPATCH() { }
     void finalizeGarbageCollectedObject();

     // ~StyleRuleBase should be public, because non-public ~StyleRuleBase
     // causes C2248 error : 'blink::StyleRuleBase::~StyleRuleBase' : cannot
     // access protected member declared in class 'blink::StyleRuleBase' when
     // compiling 'source\wtf\refcounted.h' by using msvc.
     ~StyleRuleBase() { }

 protected:
     StyleRuleBase(Type type) : m_type(type) { }
     StyleRuleBase(const StyleRuleBase& o) : m_type(o.m_type) { }

 private:
     void destroy();

     PassRefPtrWillBeRawPtr<CSSRule> createCSSOMWrapper(CSSStyleSheet* parentSheet, CSSRule* parentRule) const;

     unsigned m_type : 5;
 };

 class CORE_EXPORT StyleRule : public StyleRuleBase {
     USING_FAST_MALLOC_WILL_BE_REMOVED(StyleRule);
 public:
     // Adopts the selector list
     static PassRefPtrWillBeRawPtr<StyleRule> create(CSSSelectorList& selectorList, PassRefPtrWillBeRawPtr<StylePropertySet> properties)
     {
         return adoptRefWillBeNoop(new StyleRule(selectorList, properties));
     }

     ~StyleRule();

     const CSSSelectorList& selectorList() const { return m_selectorList; }
     const StylePropertySet& properties() const { return *m_properties; }
     MutableStylePropertySet& mutableProperties();

     void wrapperAdoptSelectorList(CSSSelectorList& selectors) { m_selectorList.adopt(selectors); }

     PassRefPtrWillBeRawPtr<StyleRule> copy() const { return adoptRefWillBeNoop(new StyleRule(*this)); }

     static unsigned averageSizeInBytes();

     DECLARE_TRACE_AFTER_DISPATCH();

 private:
     StyleRule(CSSSelectorList&, PassRefPtrWillBeRawPtr<StylePropertySet>);
     StyleRule(const StyleRule&);

     RefPtrWillBeMember<StylePropertySet> m_properties; // Cannot be null.
     CSSSelectorList m_selectorList;
 };

 class StyleRuleFontFace : public StyleRuleBase {
 public:
     static PassRefPtrWillBeRawPtr<StyleRuleFontFace> create(PassRefPtrWillBeRawPtr<StylePropertySet> properties)
     {
         return adoptRefWillBeNoop(new StyleRuleFontFace(properties));
     }

     ~StyleRuleFontFace();

     const StylePropertySet& properties() const { return *m_properties; }
     MutableStylePropertySet& mutableProperties();

     PassRefPtrWillBeRawPtr<StyleRuleFontFace> copy() const { return adoptRefWillBeNoop(new StyleRuleFontFace(*this)); }

     DECLARE_TRACE_AFTER_DISPATCH();

 private:
     StyleRuleFontFace(PassRefPtrWillBeRawPtr<StylePropertySet>);
     StyleRuleFontFace(const StyleRuleFontFace&);

     RefPtrWillBeMember<StylePropertySet> m_properties; // Cannot be null.
 };

 class StyleRulePage : public StyleRuleBase {
 public:
     // Adopts the selector list
     static PassRefPtrWillBeRawPtr<StyleRulePage> create(CSSSelectorList& selectorList, PassRefPtrWillBeRawPtr<StylePropertySet> properties)
     {
         return adoptRefWillBeNoop(new StyleRulePage(selectorList, properties));
     }

     ~StyleRulePage();

     const CSSSelector* selector() const { return m_selectorList.first(); }
     const StylePropertySet& properties() const { return *m_properties; }
     MutableStylePropertySet& mutableProperties();

     void wrapperAdoptSelectorList(CSSSelectorList& selectors) { m_selectorList.adopt(selectors); }

     PassRefPtrWillBeRawPtr<StyleRulePage> copy() const { return adoptRefWillBeNoop(new StyleRulePage(*this)); }

     DECLARE_TRACE_AFTER_DISPATCH();

 private:
     StyleRulePage(CSSSelectorList&, PassRefPtrWillBeRawPtr<StylePropertySet>);
     StyleRulePage(const StyleRulePage&);

     RefPtrWillBeMember<StylePropertySet> m_properties; // Cannot be null.
     CSSSelectorList m_selectorList;
 };

 class StyleRuleGroup : public StyleRuleBase {
 public:
     const WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& childRules() const { return m_childRules; }

     void wrapperInsertRule(unsigned, PassRefPtrWillBeRawPtr<StyleRuleBase>);
     void wrapperRemoveRule(unsigned);

     DECLARE_TRACE_AFTER_DISPATCH();

 protected:
     StyleRuleGroup(Type, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRule);
     StyleRuleGroup(const StyleRuleGroup&);

 private:
     WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>> m_childRules;
 };

 class StyleRuleMedia : public StyleRuleGroup {
 public:
     static PassRefPtrWillBeRawPtr<StyleRuleMedia> create(PassRefPtrWillBeRawPtr<MediaQuerySet> media, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRules)
     {
         return adoptRefWillBeNoop(new StyleRuleMedia(media, adoptRules));
     }

     MediaQuerySet* mediaQueries() const { return m_mediaQueries.get(); }

     PassRefPtrWillBeRawPtr<StyleRuleMedia> copy() const { return adoptRefWillBeNoop(new StyleRuleMedia(*this)); }

     DECLARE_TRACE_AFTER_DISPATCH();

 private:
     StyleRuleMedia(PassRefPtrWillBeRawPtr<MediaQuerySet>, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRules);
     StyleRuleMedia(const StyleRuleMedia&);

     RefPtrWillBeMember<MediaQuerySet> m_mediaQueries;
 };

 class StyleRuleSupports : public StyleRuleGroup {
 public:
     static PassRefPtrWillBeRawPtr<StyleRuleSupports> create(const String& conditionText, bool conditionIsSupported, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRules)
     {
         return adoptRefWillBeNoop(new StyleRuleSupports(conditionText, conditionIsSupported, adoptRules));
     }

     String conditionText() const { return m_conditionText; }
     bool conditionIsSupported() const { return m_conditionIsSupported; }
     PassRefPtrWillBeRawPtr<StyleRuleSupports> copy() const { return adoptRefWillBeNoop(new StyleRuleSupports(*this)); }

     DEFINE_INLINE_TRACE_AFTER_DISPATCH() { StyleRuleGroup::traceAfterDispatch(visitor); }

 private:
     StyleRuleSupports(const String& conditionText, bool conditionIsSupported, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRules);
     StyleRuleSupports(const StyleRuleSupports&);

     String m_conditionText;
     bool m_conditionIsSupported;
 };

 class StyleRuleViewport : public StyleRuleBase {
 public:
     static PassRefPtrWillBeRawPtr<StyleRuleViewport> create(PassRefPtrWillBeRawPtr<StylePropertySet> properties)
     {
         return adoptRefWillBeNoop(new StyleRuleViewport(properties));
     }

     ~StyleRuleViewport();

     const StylePropertySet& properties() const { return *m_properties; }
     MutableStylePropertySet& mutableProperties();

     PassRefPtrWillBeRawPtr<StyleRuleViewport> copy() const { return adoptRefWillBeNoop(new StyleRuleViewport(*this)); }

     DECLARE_TRACE_AFTER_DISPATCH();

 private:
     StyleRuleViewport(PassRefPtrWillBeRawPtr<StylePropertySet>);
     StyleRuleViewport(const StyleRuleViewport&);

     RefPtrWillBeMember<StylePropertySet> m_properties; // Cannot be null
 };

 // This should only be used within the CSS Parser
 class StyleRuleCharset : public StyleRuleBase {
     USING_FAST_MALLOC_WILL_BE_REMOVED(StyleRuleCharset);
 public:
     static PassRefPtrWillBeRawPtr<StyleRuleCharset> create() { return adoptRefWillBeNoop(new StyleRuleCharset()); }
     DEFINE_INLINE_TRACE_AFTER_DISPATCH() { StyleRuleBase::traceAfterDispatch(visitor); }

 private:
     StyleRuleCharset() : StyleRuleBase(Charset) { }
 };


 #define DEFINE_STYLE_RULE_TYPE_CASTS(Type) \
     DEFINE_TYPE_CASTS(StyleRule##Type, StyleRuleBase, rule, rule->is##Type##Rule(), rule.is##Type##Rule())

 DEFINE_TYPE_CASTS(StyleRule, StyleRuleBase, rule, rule->isStyleRule(), rule.isStyleRule());
 DEFINE_STYLE_RULE_TYPE_CASTS(FontFace);
 DEFINE_STYLE_RULE_TYPE_CASTS(Page);
 DEFINE_STYLE_RULE_TYPE_CASTS(Media);
 DEFINE_STYLE_RULE_TYPE_CASTS(Supports);
 DEFINE_STYLE_RULE_TYPE_CASTS(Viewport);
 DEFINE_STYLE_RULE_TYPE_CASTS(Charset);

 } // namespace blink

 #endif // StyleRule_h
	/*
	* (C) 1999-2003 Lars Knoll (knoll@kde.org)
	* (C) 2002-2003 Dirk Mueller (mueller@kde.org)
	* Copyright (C) 2002, 2006, 2008, 2012, 2013 Apple Inc. All rights reserved.
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Library General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Library General Public License for more details.
	*
	* You should have received a copy of the GNU Library General Public License
	* along with this library; see the file COPYING.LIB. If not, write to
	* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	* Boston, MA 02110-1301, USA.
	*/

	#ifndef StyleRule_h
	#define StyleRule_h

	#include "core/CoreExport.h"
	#include "core/css/CSSSelectorList.h"
	#include "core/css/MediaList.h"
	#include "core/css/StylePropertySet.h"
	#include "platform/heap/Handle.h"
	#include "wtf/RefPtr.h"

	namespace blink {

	class CSSRule;
	class CSSStyleSheet;

	class CORE_EXPORT StyleRuleBase : public RefCountedWillBeGarbageCollectedFinalized<StyleRuleBase> {
	USING_FAST_MALLOC_WILL_BE_REMOVED(StyleRuleBase);
	public:
	enum Type {
	Charset,
	Style,
	Import,
	Media,
	FontFace,
	Page,
	Keyframes,
	Keyframe,
	Namespace,
	Supports,
	Viewport,
	};

	Type type() const { return static_cast<Type>(m_type); }

	bool isCharsetRule() const { return type() == Charset; }
	bool isFontFaceRule() const { return type() == FontFace; }
	bool isKeyframesRule() const { return type() == Keyframes; }
	bool isKeyframeRule() const { return type() == Keyframe; }
	bool isNamespaceRule() const { return type() == Namespace; }
	bool isMediaRule() const { return type() == Media; }
	bool isPageRule() const { return type() == Page; }
	bool isStyleRule() const { return type() == Style; }
	bool isSupportsRule() const { return type() == Supports; }
	bool isViewportRule() const { return type() == Viewport; }
	bool isImportRule() const { return type() == Import; }

	PassRefPtrWillBeRawPtr<StyleRuleBase> copy() const;

	#if !ENABLE(OILPAN)
	void deref()
	{
	if (derefBase())
	destroy();
	}
	#endif // !ENABLE(OILPAN)

	// FIXME: There shouldn't be any need for the null parent version.
	PassRefPtrWillBeRawPtr<CSSRule> createCSSOMWrapper(CSSStyleSheet* parentSheet = 0) const;
	PassRefPtrWillBeRawPtr<CSSRule> createCSSOMWrapper(CSSRule* parentRule) const;

	DECLARE_TRACE();
	DEFINE_INLINE_TRACE_AFTER_DISPATCH() { }
	void finalizeGarbageCollectedObject();

	// ~StyleRuleBase should be public, because non-public ~StyleRuleBase
	// causes C2248 error : 'blink::StyleRuleBase::~StyleRuleBase' : cannot
	// access protected member declared in class 'blink::StyleRuleBase' when
	// compiling 'source\wtf\refcounted.h' by using msvc.
	~StyleRuleBase() { }

	protected:
	StyleRuleBase(Type type) : m_type(type) { }
	StyleRuleBase(const StyleRuleBase& o) : m_type(o.m_type) { }

	private:
	void destroy();

	PassRefPtrWillBeRawPtr<CSSRule> createCSSOMWrapper(CSSStyleSheet* parentSheet, CSSRule* parentRule) const;

	unsigned m_type : 5;
	};

	class CORE_EXPORT StyleRule : public StyleRuleBase {
	USING_FAST_MALLOC_WILL_BE_REMOVED(StyleRule);
	public:
	// Adopts the selector list
	static PassRefPtrWillBeRawPtr<StyleRule> create(CSSSelectorList& selectorList, PassRefPtrWillBeRawPtr<StylePropertySet> properties)
	{
	return adoptRefWillBeNoop(new StyleRule(selectorList, properties));
	}

	~StyleRule();

	const CSSSelectorList& selectorList() const { return m_selectorList; }
	const StylePropertySet& properties() const { return *m_properties; }
	MutableStylePropertySet& mutableProperties();

	void wrapperAdoptSelectorList(CSSSelectorList& selectors) { m_selectorList.adopt(selectors); }

	PassRefPtrWillBeRawPtr<StyleRule> copy() const { return adoptRefWillBeNoop(new StyleRule(*this)); }

	static unsigned averageSizeInBytes();

	DECLARE_TRACE_AFTER_DISPATCH();

	private:
	StyleRule(CSSSelectorList&, PassRefPtrWillBeRawPtr<StylePropertySet>);
	StyleRule(const StyleRule&);

	RefPtrWillBeMember<StylePropertySet> m_properties; // Cannot be null.
	CSSSelectorList m_selectorList;
	};

	class StyleRuleFontFace : public StyleRuleBase {
	public:
	static PassRefPtrWillBeRawPtr<StyleRuleFontFace> create(PassRefPtrWillBeRawPtr<StylePropertySet> properties)
	{
	return adoptRefWillBeNoop(new StyleRuleFontFace(properties));
	}

	~StyleRuleFontFace();

	const StylePropertySet& properties() const { return *m_properties; }
	MutableStylePropertySet& mutableProperties();

	PassRefPtrWillBeRawPtr<StyleRuleFontFace> copy() const { return adoptRefWillBeNoop(new StyleRuleFontFace(*this)); }

	DECLARE_TRACE_AFTER_DISPATCH();

	private:
	StyleRuleFontFace(PassRefPtrWillBeRawPtr<StylePropertySet>);
	StyleRuleFontFace(const StyleRuleFontFace&);

	RefPtrWillBeMember<StylePropertySet> m_properties; // Cannot be null.
	};

	class StyleRulePage : public StyleRuleBase {
	public:
	// Adopts the selector list
	static PassRefPtrWillBeRawPtr<StyleRulePage> create(CSSSelectorList& selectorList, PassRefPtrWillBeRawPtr<StylePropertySet> properties)
	{
	return adoptRefWillBeNoop(new StyleRulePage(selectorList, properties));
	}

	~StyleRulePage();

	const CSSSelector* selector() const { return m_selectorList.first(); }
	const StylePropertySet& properties() const { return *m_properties; }
	MutableStylePropertySet& mutableProperties();

	void wrapperAdoptSelectorList(CSSSelectorList& selectors) { m_selectorList.adopt(selectors); }

	PassRefPtrWillBeRawPtr<StyleRulePage> copy() const { return adoptRefWillBeNoop(new StyleRulePage(*this)); }

	DECLARE_TRACE_AFTER_DISPATCH();

	private:
	StyleRulePage(CSSSelectorList&, PassRefPtrWillBeRawPtr<StylePropertySet>);
	StyleRulePage(const StyleRulePage&);

	RefPtrWillBeMember<StylePropertySet> m_properties; // Cannot be null.
	CSSSelectorList m_selectorList;
	};

	class StyleRuleGroup : public StyleRuleBase {
	public:
	const WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& childRules() const { return m_childRules; }

	void wrapperInsertRule(unsigned, PassRefPtrWillBeRawPtr<StyleRuleBase>);
	void wrapperRemoveRule(unsigned);

	DECLARE_TRACE_AFTER_DISPATCH();

	protected:
	StyleRuleGroup(Type, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRule);
	StyleRuleGroup(const StyleRuleGroup&);

	private:
	WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>> m_childRules;
	};

	class StyleRuleMedia : public StyleRuleGroup {
	public:
	static PassRefPtrWillBeRawPtr<StyleRuleMedia> create(PassRefPtrWillBeRawPtr<MediaQuerySet> media, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRules)
	{
	return adoptRefWillBeNoop(new StyleRuleMedia(media, adoptRules));
	}

	MediaQuerySet* mediaQueries() const { return m_mediaQueries.get(); }

	PassRefPtrWillBeRawPtr<StyleRuleMedia> copy() const { return adoptRefWillBeNoop(new StyleRuleMedia(*this)); }

	DECLARE_TRACE_AFTER_DISPATCH();

	private:
	StyleRuleMedia(PassRefPtrWillBeRawPtr<MediaQuerySet>, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRules);
	StyleRuleMedia(const StyleRuleMedia&);

	RefPtrWillBeMember<MediaQuerySet> m_mediaQueries;
	};

	class StyleRuleSupports : public StyleRuleGroup {
	public:
	static PassRefPtrWillBeRawPtr<StyleRuleSupports> create(const String& conditionText, bool conditionIsSupported, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRules)
	{
	return adoptRefWillBeNoop(new StyleRuleSupports(conditionText, conditionIsSupported, adoptRules));
	}

	String conditionText() const { return m_conditionText; }
	bool conditionIsSupported() const { return m_conditionIsSupported; }
	PassRefPtrWillBeRawPtr<StyleRuleSupports> copy() const { return adoptRefWillBeNoop(new StyleRuleSupports(*this)); }

	DEFINE_INLINE_TRACE_AFTER_DISPATCH() { StyleRuleGroup::traceAfterDispatch(visitor); }

	private:
	StyleRuleSupports(const String& conditionText, bool conditionIsSupported, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRules);
	StyleRuleSupports(const StyleRuleSupports&);

	String m_conditionText;
	bool m_conditionIsSupported;
	};

	class StyleRuleViewport : public StyleRuleBase {
	public:
	static PassRefPtrWillBeRawPtr<StyleRuleViewport> create(PassRefPtrWillBeRawPtr<StylePropertySet> properties)
	{
	return adoptRefWillBeNoop(new StyleRuleViewport(properties));
	}

	~StyleRuleViewport();

	const StylePropertySet& properties() const { return *m_properties; }
	MutableStylePropertySet& mutableProperties();

	PassRefPtrWillBeRawPtr<StyleRuleViewport> copy() const { return adoptRefWillBeNoop(new StyleRuleViewport(*this)); }

	DECLARE_TRACE_AFTER_DISPATCH();

	private:
	StyleRuleViewport(PassRefPtrWillBeRawPtr<StylePropertySet>);
	StyleRuleViewport(const StyleRuleViewport&);

	RefPtrWillBeMember<StylePropertySet> m_properties; // Cannot be null
	};

	// This should only be used within the CSS Parser
	class StyleRuleCharset : public StyleRuleBase {
	USING_FAST_MALLOC_WILL_BE_REMOVED(StyleRuleCharset);
	public:
	static PassRefPtrWillBeRawPtr<StyleRuleCharset> create() { return adoptRefWillBeNoop(new StyleRuleCharset()); }
	DEFINE_INLINE_TRACE_AFTER_DISPATCH() { StyleRuleBase::traceAfterDispatch(visitor); }

	private:
	StyleRuleCharset() : StyleRuleBase(Charset) { }
	};


	#define DEFINE_STYLE_RULE_TYPE_CASTS(Type) \
	DEFINE_TYPE_CASTS(StyleRule##Type, StyleRuleBase, rule, rule->is##Type##Rule(), rule.is##Type##Rule())

	DEFINE_TYPE_CASTS(StyleRule, StyleRuleBase, rule, rule->isStyleRule(), rule.isStyleRule());
	DEFINE_STYLE_RULE_TYPE_CASTS(FontFace);
	DEFINE_STYLE_RULE_TYPE_CASTS(Page);
	DEFINE_STYLE_RULE_TYPE_CASTS(Media);
	DEFINE_STYLE_RULE_TYPE_CASTS(Supports);
	DEFINE_STYLE_RULE_TYPE_CASTS(Viewport);
	DEFINE_STYLE_RULE_TYPE_CASTS(Charset);

	} // namespace blink

	#endif // StyleRule_h