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/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* (C) 2002-2003 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2002-2021 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.
*/
#pragma once
#include "CSSParserEnum.h"
#include "ExceptionOr.h"
#include "StyleRuleType.h"
#include <wtf/TypeCasts.h>
namespace WebCore {
class CSSStyleSheet;
class StyleRuleBase;
class StyleRule;
class StyleRuleWithNesting;
struct CSSParserContext;
namespace CSS {
struct SerializationContext;
}
class CSSRule : public RefCounted<CSSRule> {
public:
virtual ~CSSRule() = default;
WEBCORE_EXPORT unsigned short typeForCSSOM() const;
virtual StyleRuleType styleRuleType() const = 0;
virtual bool isGroupingRule() const { return false; }
virtual String cssText() const = 0;
virtual String cssText(const CSS::SerializationContext&) const { return cssText(); }
virtual void reattach(StyleRuleBase&) = 0;
void setParentStyleSheet(CSSStyleSheet*);
void setParentRule(CSSRule*);
CSSStyleSheet* parentStyleSheet() const;
CSSRule* parentRule() const { return m_parentIsRule ? m_parentRule : nullptr; }
bool hasStyleRuleAncestor() const;
CSSParserEnum::NestedContext nestedContext() const;
virtual RefPtr<StyleRuleWithNesting> prepareChildStyleRuleForNesting(StyleRule&);
virtual void getChildStyleSheets(UncheckedKeyHashSet<RefPtr<CSSStyleSheet>>&) { }
WEBCORE_EXPORT ExceptionOr<void> setCssText(const String&);
protected:
explicit CSSRule(CSSStyleSheet*);
bool hasCachedSelectorText() const { return m_hasCachedSelectorText; }
void setHasCachedSelectorText(bool hasCachedSelectorText) const { m_hasCachedSelectorText = hasCachedSelectorText; }
const CSSParserContext& parserContext() const;
private:
mutable unsigned char m_hasCachedSelectorText : 1;
unsigned char m_parentIsRule : 1;
union {
CSSRule* m_parentRule;
CSSStyleSheet* m_parentStyleSheet;
};
};
inline CSSRule::CSSRule(CSSStyleSheet* parent)
: m_hasCachedSelectorText(false)
, m_parentIsRule(false)
, m_parentStyleSheet(parent)
{
}
inline void CSSRule::setParentStyleSheet(CSSStyleSheet* styleSheet)
{
m_parentIsRule = false;
m_parentStyleSheet = styleSheet;
}
inline void CSSRule::setParentRule(CSSRule* rule)
{
m_parentIsRule = true;
m_parentRule = rule;
}
inline CSSStyleSheet* CSSRule::parentStyleSheet() const
{
if (m_parentIsRule)
return m_parentRule ? m_parentRule->parentStyleSheet() : nullptr;
return m_parentStyleSheet;
}
} // namespace WebCore
#define SPECIALIZE_TYPE_TRAITS_CSS_RULE(ToValueTypeName, predicate) \
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::ToValueTypeName) \
static bool isType(const WebCore::CSSRule& rule) { return rule.styleRuleType() == WebCore::predicate; } \
SPECIALIZE_TYPE_TRAITS_END()
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