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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, 2012 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 THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_RULE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_RULE_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
class CSSParserContext;
class CSSRuleList;
class CSSStyleSheet;
class StyleRuleBase;
enum class SecureContextMode;
class CORE_EXPORT CSSRule : public ScriptWrappable {
DEFINE_WRAPPERTYPEINFO();
public:
~CSSRule() override = default;
enum Type {
kStyleRule = 1,
kCharsetRule = 2,
kImportRule = 3,
kMediaRule = 4,
kFontFaceRule = 5,
kPageRule = 6,
kKeyframesRule = 7,
kKeyframeRule = 8,
kNamespaceRule = 10,
kSupportsRule = 12,
kViewportRule = 15,
};
virtual Type type() const = 0;
virtual String cssText() const = 0;
virtual void Reattach(StyleRuleBase*) = 0;
virtual CSSRuleList* cssRules() const { return nullptr; }
void SetParentStyleSheet(CSSStyleSheet*);
void SetParentRule(CSSRule*);
void Trace(blink::Visitor*) override;
CSSStyleSheet* parentStyleSheet() const {
if (parent_is_rule_)
return parent_rule_ ? parent_rule_->parentStyleSheet() : nullptr;
return parent_style_sheet_;
}
CSSRule* parentRule() const {
return parent_is_rule_ ? parent_rule_ : nullptr;
}
// The CSSOM spec states that "setting the cssText attribute must do nothing."
void setCSSText(const String&) {}
protected:
CSSRule(CSSStyleSheet* parent)
: has_cached_selector_text_(false),
parent_is_rule_(false),
parent_style_sheet_(parent) {}
bool HasCachedSelectorText() const { return has_cached_selector_text_; }
void SetHasCachedSelectorText(bool has_cached_selector_text) const {
has_cached_selector_text_ = has_cached_selector_text;
}
const CSSParserContext* ParserContext(SecureContextMode) const;
private:
mutable unsigned char has_cached_selector_text_ : 1;
unsigned char parent_is_rule_ : 1;
// These should be Members, but no Members in unions.
union {
CSSRule* parent_rule_;
CSSStyleSheet* parent_style_sheet_;
};
};
#define DEFINE_CSS_RULE_TYPE_CASTS(ToType, TYPE_NAME) \
DEFINE_TYPE_CASTS(ToType, CSSRule, rule, rule->type() == CSSRule::TYPE_NAME, \
rule.type() == CSSRule::TYPE_NAME)
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_RULE_H_