1 files changed, 49 insertions, 0 deletions
diff --git a/layout/style/CSSSupportsRule.h b/layout/style/CSSSupportsRule.h
new file mode 100644
index 0000000000..e291f8079c
--- /dev/null
+++ b/layout/style/CSSSupportsRule.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_CSSSupportsRule_h
+#define mozilla_dom_CSSSupportsRule_h
+
+#include "mozilla/css/GroupRule.h"
+#include "mozilla/ServoBindingTypes.h"
+
+namespace mozilla {
+namespace dom {
+
+class CSSSupportsRule : public css::ConditionRule {
+ public:
+  CSSSupportsRule(RefPtr<RawServoSupportsRule> aRawRule, StyleSheet* aSheet,
+                  css::Rule* aParentRule, uint32_t aLine, uint32_t aColumn);
+
+  NS_DECL_ISUPPORTS_INHERITED
+
+#ifdef DEBUG
+  void List(FILE* out = stdout, int32_t aIndent = 0) const final;
+#endif
+
+  RawServoSupportsRule* Raw() const { return mRawRule; }
+
+  // WebIDL interface
+  uint16_t Type() const override { return CSSRule_Binding::SUPPORTS_RULE; }
+  void GetCssText(nsACString& aCssText) const final;
+  void GetConditionText(nsACString& aConditionText) final;
+  void SetConditionText(const nsACString& aConditionText,
+                        ErrorResult& aRv) final;
+
+  size_t SizeOfIncludingThis(MallocSizeOf) const override;
+  JSObject* WrapObject(JSContext* aCx,
+                       JS::Handle<JSObject*> aGivenProto) override;
+
+ private:
+  ~CSSSupportsRule() = default;
+
+  RefPtr<RawServoSupportsRule> mRawRule;
+};
+
+}  // namespace dom
+}  // namespace mozilla
+
+#endif  // mozilla_dom_CSSSupportsRule_h