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/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* (C) 2002-2003 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2002, 2006, 2007 Apple Inc. All rights reserved.
* Copyright (C) 2011 Andreas Kling (kling@webkit.org)
*
* 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 CSSRule_h
#define CSSRule_h
#include "KURLHash.h"
#include <wtf/ListHashSet.h>
#include <wtf/RefCounted.h>
namespace WebCore {
class CSSStyleSheet;
class StyleRuleBase;
struct CSSParserContext;
typedef int ExceptionCode;
class CSSRule : public RefCounted<CSSRule> {
public:
// Override RefCounted's deref() to ensure operator delete is called on
// the appropriate subclass type.
void deref()
{
if (derefBase())
destroy();
}
enum Type {
UNKNOWN_RULE,
STYLE_RULE,
CHARSET_RULE,
IMPORT_RULE,
MEDIA_RULE,
FONT_FACE_RULE,
PAGE_RULE,
// 7 was VARIABLES_RULE; we now match other browsers with 7 as
// KEYFRAMES_RULE:
// <https://bugs.webkit.org/show_bug.cgi?id=71293>.
WEBKIT_KEYFRAMES_RULE,
WEBKIT_KEYFRAME_RULE,
#if ENABLE(CSS_REGIONS)
WEBKIT_REGION_RULE = 16
#endif
};
Type type() const { return static_cast<Type>(m_type); }
bool isCharsetRule() const { return type() == CHARSET_RULE; }
bool isFontFaceRule() const { return type() == FONT_FACE_RULE; }
bool isKeyframeRule() const { return type() == WEBKIT_KEYFRAME_RULE; }
bool isKeyframesRule() const { return type() == WEBKIT_KEYFRAMES_RULE; }
bool isMediaRule() const { return type() == MEDIA_RULE; }
bool isPageRule() const { return type() == PAGE_RULE; }
bool isStyleRule() const { return type() == STYLE_RULE; }
bool isImportRule() const { return type() == IMPORT_RULE; }
#if ENABLE(CSS_REGIONS)
bool isRegionRule() const { return type() == WEBKIT_REGION_RULE; }
#endif
void setParentStyleSheet(CSSStyleSheet* styleSheet)
{
m_parentIsRule = false;
m_parentStyleSheet = styleSheet;
}
void setParentRule(CSSRule* rule)
{
m_parentIsRule = true;
m_parentRule = rule;
}
CSSStyleSheet* parentStyleSheet() const
{
if (m_parentIsRule)
return m_parentRule ? m_parentRule->parentStyleSheet() : 0;
return m_parentStyleSheet;
}
CSSRule* parentRule() const { return m_parentIsRule ? m_parentRule : 0; }
String cssText() const;
void setCssText(const String&, ExceptionCode&);
void reattach(StyleRuleBase*);
void reportMemoryUsage(MemoryObjectInfo*) const;
protected:
CSSRule(CSSStyleSheet* parent, Type type)
: m_hasCachedSelectorText(false)
, m_parentIsRule(false)
, m_type(type)
, m_parentStyleSheet(parent)
{
}
// NOTE: This class is non-virtual for memory and performance reasons.
// Don't go making it virtual again unless you know exactly what you're doing!
~CSSRule() { }
bool hasCachedSelectorText() const { return m_hasCachedSelectorText; }
void setHasCachedSelectorText(bool hasCachedSelectorText) const { m_hasCachedSelectorText = hasCachedSelectorText; }
const CSSParserContext& parserContext() const;
void reportBaseClassMemoryUsage(MemoryObjectInfo*) const;
private:
mutable unsigned m_hasCachedSelectorText : 1;
unsigned m_parentIsRule : 1;
unsigned m_type : 5;
union {
CSSRule* m_parentRule;
CSSStyleSheet* m_parentStyleSheet;
};
void destroy();
};
} // namespace WebCore
#endif // CSSRule_h
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