1 files changed, 48 insertions, 0 deletions
diff --git a/comm/mailnews/jsaccount/src/DelegateList.h b/comm/mailnews/jsaccount/src/DelegateList.h
new file mode 100644
index 0000000000..f59e178f0c
--- /dev/null
+++ b/comm/mailnews/jsaccount/src/DelegateList.h
@@ -0,0 +1,48 @@
+/* -*- 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 _DelegateList_H_
+#define _DelegateList_H_
+
+#include "nsISupports.h"
+#include "msgIDelegateList.h"
+#include "nsTHashMap.h"
+#include "nsString.h"
+
+namespace mozilla {
+namespace mailnews {
+
+// This class provides a list of method names to delegate to another object.
+class DelegateList : public msgIDelegateList {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_MSGIDELEGATELIST
+  DelegateList() {}
+  nsTHashMap<nsCStringHashKey, bool> mMethods;
+
+ protected:
+  virtual ~DelegateList() {}
+};
+
+}  // namespace mailnews
+}  // namespace mozilla
+
+/*
+ * This macro is used in forwarding functions.
+ *   _jsdelegate: the name of the JS pointer that implements a particular
+ *                interface.
+ *   _jsmethods:  the DelegateList object
+ *   _cppbase:    the C++ base instance (used when call not delegated to js)
+ *
+ **/
+
+#define DELEGATE_JS(_jsdelegate, _jsmethods, _cppbase)      \
+  (_jsdelegate && _jsmethods &&                             \
+           _jsmethods->Contains(nsLiteralCString(__func__)) \
+       ? _jsdelegate                                        \
+       : (_cppbase))
+
+#endif