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Diffstat (limited to 'toolkit/xre/nsINativeAppSupport.idl')
| -rw-r--r-- | toolkit/xre/nsINativeAppSupport.idl | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/toolkit/xre/nsINativeAppSupport.idl b/toolkit/xre/nsINativeAppSupport.idl new file mode 100644 index 000000000..c9a316a98 --- /dev/null +++ b/toolkit/xre/nsINativeAppSupport.idl @@ -0,0 +1,104 @@ +/* -*- 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" + +/* nsINativeAppSupport + * + * This "pseudo" (in the XPCOM sense) interface provides for + * platform-specific general application support: + * o It manages the details of the simple DDE communication + * supported on the Win32 platform (it is the addition of this + * item that prompted the creation of this interface. + * + * Due to the nature of the beast, this interface is not a full-blown + * XPCOM component. The primary reason is that objects that implement + * this interface generally must be operational *before* XPCOM (or any + * of the rest of Mozilla) are initialized. As a result, this + * interface is instantiated by somewhat unconventional means. + * + * To create the implementor of this interface, you call the function + * NS_CreateNativeAppSupport. This is done in the startup code + * in nsAppRunner.cpp + * + * The interface provides these functions: + * start - You call this to inform the native app support that the + * application is starting. In addition, it serves as a + * query as to whether the application should continue to + * run. + * + * If the returned boolean result is PR_FALSE, then the + * application should exit without further processing. In + * such cases, the returned nsresult indicates whether the + * reason to exit is due to an error or not. + * + * Win32 Note: In the case of starting a second instance + * of this executable, this function will return + * PR_FALSE and nsresult==NS_OK. This means that + * the command line arguments have been + * successfully passed to the instance of the + * application acting as a DDE server. + * + * stop - You call this to inform the native app support that the + * application *wishes* to terminate. If the returned boolean + * value is PR_FALSE, then the application should continue + * (as if there were still additional top-level windows open). + * + * Win32 Note: If this is the instance of the application + * acting as the DDE server, and there are current + * DDE conversations active with other instances + * acting as DDE clients, then this function will + * return PR_FALSE. + * + * quit - Like Stop, but this method *forces* termination (or more + * precisely, indicates that the application is about to be + * terminated regardless of what a call to Stop might have + * returned. + * + * This method is intended to be called when the user selects + * the "Quit" option (close all windows and exit). + * + * Win32 Note: Stop is problematic in the case of "Quit" (close + * all windows and exit the application) because + * either we don't Quit or (potentially) we lose + * requests coming from other instances of the + * application. The strategy is to give preference + * to the user's explicit Quit request. In the + * unlikely event that a request is pending from + * another instance of the application, then such + * requests are essentially ignored. This is + * roughly equivalent to handling that request by + * opening a new window, followed by immediately + * closing it. Since this is the same as if the + * request came in immediately before the Quit + * call (versus immediately after it), no harm. + * + * There is an exposure here: Upon return from this + * function, any DDE connect request (for Mozilla) + * will fail and other instances of the application + * will start up as a DDE server. In that case, + * those instances may do things that conflict with + * the subsequent shutting down of the instance that + * is quitting. For this reason, the call to Quit + * should be deferred as long as possible. + * + * onLastWindowClosing - Called when the last window is closed. Used as a + * "soft" shutdown, passwords are flushed. + */ + +interface nsIXULWindow; +interface nsICmdLineService; + +[scriptable, uuid(5fdf8480-1f98-11d4-8077-00600811a9c3)] +interface nsINativeAppSupport : nsISupports { + // Startup/shutdown. + boolean start(); + void enable(); + boolean stop(); + void quit(); + + void onLastWindowClosing(); + void ReOpen(); +}; |