1 files changed, 41 insertions, 0 deletions
diff --git a/dom/bindings/RootedDictionary.h b/dom/bindings/RootedDictionary.h
new file mode 100644
index 0000000000..24fb859ae3
--- /dev/null
+++ b/dom/bindings/RootedDictionary.h
@@ -0,0 +1,41 @@
+/* -*- 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_RootedDictionary_h__
+#define mozilla_dom_RootedDictionary_h__
+
+#include "mozilla/dom/Nullable.h"
+#include "jsapi.h"
+
+namespace mozilla::dom {
+
+template <typename T>
+class MOZ_RAII RootedDictionary final : public T, private JS::CustomAutoRooter {
+ public:
+  template <typename CX>
+  explicit RootedDictionary(const CX& cx) : T(), JS::CustomAutoRooter(cx) {}
+
+  virtual void trace(JSTracer* trc) override { this->TraceDictionary(trc); }
+};
+
+template <typename T>
+class MOZ_RAII NullableRootedDictionary final : public Nullable<T>,
+                                                private JS::CustomAutoRooter {
+ public:
+  template <typename CX>
+  explicit NullableRootedDictionary(const CX& cx)
+      : Nullable<T>(), JS::CustomAutoRooter(cx) {}
+
+  virtual void trace(JSTracer* trc) override {
+    if (!this->IsNull()) {
+      this->Value().TraceDictionary(trc);
+    }
+  }
+};
+
+}  // namespace mozilla::dom
+
+#endif /* mozilla_dom_RootedDictionary_h__ */