1 files changed, 62 insertions, 0 deletions
diff --git a/dom/base/ContentFrameMessageManager.h b/dom/base/ContentFrameMessageManager.h
new file mode 100644
index 0000000000..49c0676bcb
--- /dev/null
+++ b/dom/base/ContentFrameMessageManager.h
@@ -0,0 +1,62 @@
+/* -*- 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_ContentFrameMessageManager_h
+#define mozilla_dom_ContentFrameMessageManager_h
+
+#include "mozilla/DOMEventTargetHelper.h"
+#include "mozilla/dom/MessageManagerGlobal.h"
+#include "nsContentUtils.h"
+#include "xpcpublic.h"
+
+namespace mozilla::dom {
+
+template <typename>
+struct Nullable;
+class WindowProxyHolder;
+
+#define NS_CONTENTFRAMEMESSAGEMANAGER_IID            \
+  {                                                  \
+    0x97e192a6, 0xab7a, 0x4c8f, {                    \
+      0xb7, 0xdd, 0xf7, 0xec, 0x36, 0x38, 0x71, 0xb5 \
+    }                                                \
+  }
+
+/**
+ * Base class for implementing the WebIDL ContentFrameMessageManager class.
+ */
+class ContentFrameMessageManager : public DOMEventTargetHelper,
+                                   public MessageManagerGlobal {
+ public:
+  using DOMEventTargetHelper::AddRef;
+  using DOMEventTargetHelper::Release;
+
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_CONTENTFRAMEMESSAGEMANAGER_IID)
+
+  virtual Nullable<WindowProxyHolder> GetContent(ErrorResult& aError) = 0;
+  virtual already_AddRefed<nsIDocShell> GetDocShell(ErrorResult& aError) = 0;
+  virtual already_AddRefed<nsIEventTarget> GetTabEventTarget() = 0;
+
+  nsFrameMessageManager* GetMessageManager() { return mMessageManager; }
+  void DisconnectMessageManager() {
+    mMessageManager->Disconnect();
+    mMessageManager = nullptr;
+  }
+
+  JSObject* GetOrCreateWrapper();
+
+ protected:
+  explicit ContentFrameMessageManager(nsFrameMessageManager* aMessageManager)
+      : DOMEventTargetHelper(xpc::NativeGlobal(xpc::PrivilegedJunkScope())),
+        MessageManagerGlobal(aMessageManager) {}
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(ContentFrameMessageManager,
+                              NS_CONTENTFRAMEMESSAGEMANAGER_IID)
+
+}  // namespace mozilla::dom
+
+#endif  // mozilla_dom_ContentFrameMessageManager_h