style_rule_nested_declarations.h | Explore in Territory

// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_RULE_NESTED_DECLARATIONS_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_RULE_NESTED_DECLARATIONS_H_

#include "third_party/blink/renderer/core/css/style_rule.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"

namespace blink {

class CSSPropertyValueSet;
class MutableCSSPropertyValueSet;
class StyleRule;

// A "nested declarations rule" represents a "bare" list of declarations
// that appears in a nesting context. This rule exists to make it possible
// to mix nested rules and bare declarations without reordering things.
//
// StyleRuleNestedDeclarations has an inner, non-observable StyleRule
// which is added to the RuleSet during RuleSet::AddChildRules.
// This inner StyleRule contains the "bare" list of declarations,
// and its selector list is a *copy* of the parent rule's selector list
// (for regular nesting), or a :where(:scope) selector (for @scope).
//
// https://drafts.csswg.org/css-nesting-1/#nested-declarations-rule
class CORE_EXPORT StyleRuleNestedDeclarations : public StyleRuleBase { … };

template <>
struct DowncastTraits<StyleRuleNestedDeclarations> { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_RULE_NESTED_DECLARATIONS_H_
chromium/third_party/blink/renderer/core/css/style_rule_nested_declarations.h
