michael@0: /* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef nsAppShellSingleton_h__
michael@0: #define nsAppShellSingleton_h__
michael@0: 
michael@0: /**
michael@0:  * This file is designed to be included into the file that provides the
michael@0:  * nsIModule implementation for a particular widget toolkit.
michael@0:  *
michael@0:  * The following functions are defined:
michael@0:  *   nsAppShellInit
michael@0:  *   nsAppShellShutdown
michael@0:  *   nsAppShellConstructor
michael@0:  *
michael@0:  * The nsAppShellInit function is designed to be used as a module constructor.
michael@0:  * If you already have a module constructor, then call nsAppShellInit from your
michael@0:  * module constructor.
michael@0:  *
michael@0:  * The nsAppShellShutdown function is designed to be used as a module
michael@0:  * destructor.  If you already have a module destructor, then call
michael@0:  * nsAppShellShutdown from your module destructor.
michael@0:  *
michael@0:  * The nsAppShellConstructor function is designed to be used as a factory
michael@0:  * method for the nsAppShell class.
michael@0:  */
michael@0: 
michael@0: #include "nsXULAppAPI.h"
michael@0: #if defined(MOZ_METRO) && defined(XP_WIN)
michael@0: #include "winrt/MetroAppShell.h"
michael@0: #endif
michael@0: 
michael@0: static nsIAppShell *sAppShell;
michael@0: 
michael@0: static nsresult
michael@0: nsAppShellInit()
michael@0: {
michael@0:   NS_ASSERTION(!sAppShell, "already initialized");
michael@0: 
michael@0: #if !defined(MOZ_METRO) || !defined(XP_WIN)
michael@0:   sAppShell = new nsAppShell();
michael@0: #else
michael@0:   if (XRE_GetWindowsEnvironment() == WindowsEnvironmentType_Metro) {
michael@0:     sAppShell = new MetroAppShell();
michael@0:   } else {
michael@0:     sAppShell = new nsAppShell();
michael@0:   }
michael@0: #endif
michael@0:   if (!sAppShell)
michael@0:     return NS_ERROR_OUT_OF_MEMORY;
michael@0:   NS_ADDREF(sAppShell);
michael@0: 
michael@0:   nsresult rv;
michael@0: #if !defined(MOZ_METRO) || !defined(XP_WIN)
michael@0:   rv = static_cast<nsAppShell*>(sAppShell)->Init();
michael@0: #else
michael@0:   if (XRE_GetWindowsEnvironment() == WindowsEnvironmentType_Metro) {
michael@0:     rv = static_cast<MetroAppShell*>(sAppShell)->Init();
michael@0:   } else {
michael@0:     rv = static_cast<nsAppShell*>(sAppShell)->Init();
michael@0:   }
michael@0: #endif
michael@0:   if (NS_FAILED(rv)) {
michael@0:     NS_RELEASE(sAppShell);
michael@0:     return rv;
michael@0:   }
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: static void
michael@0: nsAppShellShutdown()
michael@0: {
michael@0:   NS_RELEASE(sAppShell);
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: nsAppShellConstructor(nsISupports *outer, const nsIID &iid, void **result)
michael@0: {
michael@0:   NS_ENSURE_TRUE(!outer, NS_ERROR_NO_AGGREGATION);
michael@0:   NS_ENSURE_TRUE(sAppShell, NS_ERROR_NOT_INITIALIZED);
michael@0: 
michael@0:   return sAppShell->QueryInterface(iid, result);
michael@0: }
michael@0: 
michael@0: #endif  // nsAppShellSingleton_h__