diff -r 000000000000 -r 6474c204b198 embedding/components/commandhandler/public/nsIControllerCommand.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/embedding/components/commandhandler/public/nsIControllerCommand.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,51 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * 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/. */
+
+#include "nsISupports.idl"
+#include "nsICommandParams.idl"
+
+/**
+ * nsIControllerCommand
+ *
+ * A generic command interface. You can register an nsIControllerCommand
+ * with the nsIControllerCommandTable.
+ */
+
+[scriptable, uuid(0eae9a46-1dd2-11b2-aca0-9176f05fe9db)]
+interface nsIControllerCommand : nsISupports
+{
+
+  /**
+   * Returns true if the command is currently enabled. An nsIControllerCommand
+   * can implement more than one commands; say, a group of related commands
+   * (e.g. delete left/delete right). Because of this, the command name is
+   * passed to each method.
+   *
+   * @param aCommandName  the name of the command for which we want the enabled
+   *                      state.
+   * @param aCommandContext    a cookie held by the nsIControllerCommandTable,
+   *                  allowing the command to get some context information.
+   *                  The contents of this cookie are implementation-defined.
+   */
+  boolean isCommandEnabled(in string aCommandName, in nsISupports aCommandContext);
+
+  void getCommandStateParams(in string aCommandName, in nsICommandParams aParams, in nsISupports aCommandContext);
+  
+  /**
+   * Execute the name command.
+   *
+   * @param aCommandName  the name of the command to execute.
+   * 
+   * @param aCommandContext    a cookie held by the nsIControllerCommandTable,
+   *                  allowing the command to get some context information.
+   *                  The contents of this cookie are implementation-defined.
+   */
+  void    doCommand(in string aCommandName, in nsISupports aCommandContext);
+
+  void    doCommandParams(in string aCommandName, in nsICommandParams aParams, in nsISupports aCommandContext);
+  
+};
+