1 files changed, 52 insertions, 0 deletions
diff --git a/mailnews/jsaccount/src/DelegateList.h b/mailnews/jsaccount/src/DelegateList.h
new file mode 100644
index 000000000..943b3e726
--- /dev/null
+++ b/mailnews/jsaccount/src/DelegateList.h
@@ -0,0 +1,52 @@
+/* -*- 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 "nsDataHashtable.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(const char *aWindowsPrefix) :
+    mPrefix(aWindowsPrefix)
+  { }
+  nsDataHashtable<nsCStringHashKey, bool> mMethods;
+
+protected:
+  virtual ~DelegateList() { }
+  nsCString mPrefix; // Windows decorated method prefix.
+};
+
+} // namespace mailnews
+} // namespace mozilla
+
+/*
+ * This macro is used in forwarding functions.
+ *   _interface: the interface being forwarded.
+ *   _jsdelegate: the name of the JS pointer that implements a particular
+ *                interface.
+ *
+ * You must follow the naming convention:
+ *   1) use mCppBase as the name of the C++ base class instance.
+ *   2) use mMethod as the name of the DelegateList object.
+ **/
+
+#define DELEGATE_JS(_interface, _jsdelegate) (\
+    _jsdelegate && mMethods && \
+    mMethods->Contains(nsLiteralCString(__FUNCTION__)) ? \
+       _jsdelegate : nsCOMPtr<_interface>(do_QueryInterface(mCppBase)))
+
+#endif