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       1             : /* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
       2             : /* This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #ifndef nsAppShellSingleton_h__
       7             : #define nsAppShellSingleton_h__
       8             : 
       9             : /**
      10             :  * This file is designed to be included into the file that provides the
      11             :  * nsIModule implementation for a particular widget toolkit.
      12             :  *
      13             :  * The following functions are defined:
      14             :  *   nsAppShellInit
      15             :  *   nsAppShellShutdown
      16             :  *   nsAppShellConstructor
      17             :  *
      18             :  * The nsAppShellInit function is designed to be used as a module constructor.
      19             :  * If you already have a module constructor, then call nsAppShellInit from your
      20             :  * module constructor.
      21             :  *
      22             :  * The nsAppShellShutdown function is designed to be used as a module
      23             :  * destructor.  If you already have a module destructor, then call
      24             :  * nsAppShellShutdown from your module destructor.
      25             :  *
      26             :  * The nsAppShellConstructor function is designed to be used as a factory
      27             :  * method for the nsAppShell class.
      28             :  */
      29             : 
      30             : #include "nsXULAppAPI.h"
      31             : 
      32             : static nsIAppShell *sAppShell;
      33             : 
      34             : static nsresult
      35           3 : nsAppShellInit()
      36             : {
      37           3 :   NS_ASSERTION(!sAppShell, "already initialized");
      38             : 
      39           3 :   sAppShell = new nsAppShell();
      40           3 :   if (!sAppShell)
      41           0 :     return NS_ERROR_OUT_OF_MEMORY;
      42           3 :   NS_ADDREF(sAppShell);
      43             : 
      44             :   nsresult rv;
      45           3 :   rv = static_cast<nsAppShell*>(sAppShell)->Init();
      46           3 :   if (NS_FAILED(rv)) {
      47           0 :     NS_RELEASE(sAppShell);
      48           0 :     return rv;
      49             :   }
      50             : 
      51           3 :   return NS_OK;
      52             : }
      53             : 
      54             : static void
      55           0 : nsAppShellShutdown()
      56             : {
      57           0 :   NS_RELEASE(sAppShell);
      58           0 : }
      59             : 
      60             : static nsresult
      61           3 : nsAppShellConstructor(nsISupports *outer, const nsIID &iid, void **result)
      62             : {
      63           3 :   NS_ENSURE_TRUE(!outer, NS_ERROR_NO_AGGREGATION);
      64           3 :   NS_ENSURE_TRUE(sAppShell, NS_ERROR_NOT_INITIALIZED);
      65             : 
      66           3 :   return sAppShell->QueryInterface(iid, result);
      67             : }
      68             : 
      69             : #endif  // nsAppShellSingleton_h__