The Tor Browser: widget/xpwidgets/nsAppShellSingleton.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     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/. */

     6 #ifndef nsAppShellSingleton_h__

     7 #define nsAppShellSingleton_h__

     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  */

    30 #include "nsXULAppAPI.h"

    31 #if defined(MOZ_METRO) && defined(XP_WIN)

    32 #include "winrt/MetroAppShell.h"

    33 #endif

    35 static nsIAppShell *sAppShell;

    37 static nsresult

    38 nsAppShellInit()

    39 {

    40   NS_ASSERTION(!sAppShell, "already initialized");

    42 #if !defined(MOZ_METRO) || !defined(XP_WIN)

    43   sAppShell = new nsAppShell();

    44 #else

    45   if (XRE_GetWindowsEnvironment() == WindowsEnvironmentType_Metro) {

    46     sAppShell = new MetroAppShell();

    47   } else {

    48     sAppShell = new nsAppShell();

    49   }

    50 #endif

    51   if (!sAppShell)

    52     return NS_ERROR_OUT_OF_MEMORY;

    53   NS_ADDREF(sAppShell);

    55   nsresult rv;

    56 #if !defined(MOZ_METRO) || !defined(XP_WIN)

    57   rv = static_cast<nsAppShell*>(sAppShell)->Init();

    58 #else

    59   if (XRE_GetWindowsEnvironment() == WindowsEnvironmentType_Metro) {

    60     rv = static_cast<MetroAppShell*>(sAppShell)->Init();

    61   } else {

    62     rv = static_cast<nsAppShell*>(sAppShell)->Init();

    63   }

    64 #endif

    65   if (NS_FAILED(rv)) {

    66     NS_RELEASE(sAppShell);

    67     return rv;

    68   }

    70   return NS_OK;

    71 }

    73 static void

    74 nsAppShellShutdown()

    75 {

    76   NS_RELEASE(sAppShell);

    77 }

    79 static nsresult

    80 nsAppShellConstructor(nsISupports *outer, const nsIID &iid, void **result)

    81 {

    82   NS_ENSURE_TRUE(!outer, NS_ERROR_NO_AGGREGATION);

    83   NS_ENSURE_TRUE(sAppShell, NS_ERROR_NOT_INITIALIZED);

    85   return sAppShell->QueryInterface(iid, result);

    86 }

    88 #endif  // nsAppShellSingleton_h__

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