third_party/blink/renderer/core/css/css_supports_rule.h

/* Copyright (C) 2012 Motorola Mobility Inc. All rights reserved.
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 * 2. Redistributions in binary form must reproduce the above
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 * 3. Neither the name of Motorola Mobility Inc. nor the names of its
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 *    software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_SUPPORTS_RULE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_SUPPORTS_RULE_H_

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

namespace blink {

class StyleRuleSupports;

// TODO(crbug.com/1517290): Remove CORE_EXPORT when we're done use-counting.
class CORE_EXPORT CSSSupportsRule final : public CSSConditionRule {
  DEFINE_WRAPPERTYPEINFO();

 public:
  CSSSupportsRule(StyleRuleSupports*, CSSStyleSheet*);
  ~CSSSupportsRule() override = default;

  String cssText() const override;

  void SetConditionText(const ExecutionContext*, String);

  bool ConditionIsSupported() const {
    return To<StyleRuleSupports>(group_rule_.Get())->ConditionIsSupported();
  }

 private:
  CSSRule::Type GetType() const override { return kSupportsRule; }
};

template <>
struct DowncastTraits<CSSSupportsRule> {
  static bool AllowFrom(const CSSRule& rule) {
    return rule.GetType() == CSSRule::kSupportsRule;
  }
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_SUPPORTS_RULE_H_