1 files changed, 39 insertions, 0 deletions
diff --git a/layout/style/CSSRuleList.h b/layout/style/CSSRuleList.h
new file mode 100644
index 0000000000..b3802233d0
--- /dev/null
+++ b/layout/style/CSSRuleList.h
@@ -0,0 +1,39 @@
+/* -*- 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_CSSRuleList_h
+#define mozilla_dom_CSSRuleList_h
+
+#include "mozilla/StyleSheetInlines.h"
+#include "mozilla/css/Rule.h"
+#include "nsWrapperCache.h"
+
+namespace mozilla::dom {
+
+class CSSRuleList : public nsISupports, public nsWrapperCache {
+ public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(CSSRuleList)
+
+  virtual StyleSheet* GetParentObject() = 0;
+  JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) final;
+
+  // WebIDL API
+  css::Rule* Item(uint32_t aIndex) {
+    bool unused;
+    return IndexedGetter(aIndex, unused);
+  }
+
+  virtual css::Rule* IndexedGetter(uint32_t aIndex, bool& aFound) = 0;
+  virtual uint32_t Length() = 0;
+
+ protected:
+  virtual ~CSSRuleList() = default;
+};
+
+}  // namespace mozilla::dom
+
+#endif /* mozilla_dom_CSSRuleList_h */