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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/core/css/media_query_set_owner.h"
#include "third_party/blink/renderer/core/frame/web_feature_forward.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_vector.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/member.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
class CSSParserContext;
class CSSRuleList;
class CSSStyleSheet;
class StyleRuleBase;
class MediaQuerySetOwner;
enum class SecureContextMode;
class ExecutionContext;
class ExceptionState;
class CORE_EXPORT CSSRule : public ScriptWrappable {
DEFINE_WRAPPERTYPEINFO();
public:
~CSSRule() override = default;
enum Type {
// Web-exposed values, see css_rule.idl:
kStyleRule = 1,
kCharsetRule = 2,
kImportRule = 3,
kMediaRule = 4,
kFontFaceRule = 5,
kPageRule = 6,
kKeyframesRule = 7,
kKeyframeRule = 8,
kMarginRule = 9,
kNamespaceRule = 10,
kCounterStyleRule = 11,
kSupportsRule = 12,
kFontFeatureValuesRule = 14,
// CSSOM constants are deprecated [1], and there will be no new
// web-exposed values.
//
// [1] https://wiki.csswg.org/spec/cssom-constants
// Values for internal use, not web-exposed:
kFirstInternalRule = 16,
// go/keep-sorted start
kContainerRule = kFirstInternalRule,
kFontFeatureRule,
kFontPaletteValuesRule,
kFunctionDeclarationsRule,
kFunctionRule,
kLayerBlockRule,
kLayerStatementRule,
kNestedDeclarationsRule,
kPositionTryRule,
kPropertyRule,
kScopeRule,
kStartingStyleRule,
kViewTransitionRule,
// go/keep-sorted end
};
virtual Type GetType() const = 0;
// https://drafts.csswg.org/cssom/#dom-cssrule-type
int type() const {
Type type = GetType();
return type >= Type::kFirstInternalRule ? 0 : static_cast<int>(type);
}
virtual String cssText() const = 0;
virtual void Reattach(StyleRuleBase*) = 0;
virtual CSSRuleList* cssRules() const { return nullptr; }
virtual MediaQuerySetOwner* GetMediaQuerySetOwner() { return nullptr; }
void SetParentStyleSheet(CSSStyleSheet*);
void SetParentRule(CSSRule*);
void Trace(Visitor*) const override;
CSSStyleSheet* parentStyleSheet() const {
if (parent_is_rule_) {
return parent_ ? ParentAsCSSRule()->parentStyleSheet() : nullptr;
}
return ParentAsCSSStyleSheet();
}
CSSRule* parentRule() const {
return parent_is_rule_ ? ParentAsCSSRule() : nullptr;
}
// The CSSOM spec states that "setting the cssText attribute must do nothing."
void setCSSText(const String&) {}
protected:
explicit CSSRule(CSSStyleSheet* 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;
void CountUse(WebFeature) const;
private:
bool VerifyParentIsCSSRule() const;
bool VerifyParentIsCSSStyleSheet() const;
CSSRule* ParentAsCSSRule() const {
DCHECK(parent_is_rule_);
DCHECK(VerifyParentIsCSSRule());
return reinterpret_cast<CSSRule*>(parent_.Get());
}
CSSStyleSheet* ParentAsCSSStyleSheet() const {
DCHECK(!parent_is_rule_);
DCHECK(VerifyParentIsCSSStyleSheet());
return reinterpret_cast<CSSStyleSheet*>(parent_.Get());
}
mutable unsigned char has_cached_selector_text_ : 1;
unsigned char parent_is_rule_ : 1;
// parent_ should reference either CSSRule or CSSStyleSheet (both are
// descendants of ScriptWrappable). This field should only be accessed
// via the getters above (ParentAsCSSRule and ParentAsCSSStyleSheet).
Member<ScriptWrappable> parent_;
friend StyleRuleBase* ParseRuleForInsert(
const ExecutionContext* execution_context,
const String& rule_string,
unsigned index,
size_t num_child_rules,
CSSRule& parent_rule,
ExceptionState& exception_state);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_RULE_H_
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