/* -*- Mode: IDL; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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"

interface nsICmdLineService;

[scriptable, uuid(5016bc45-54d9-4f97-935c-df4cef4b999f)]
interface nsIAppStartup : nsISupports
{
    /**
     * Create the hidden window.
     */
    void createHiddenWindow();

    /**
     * Destroys the hidden window. This will have no effect if the hidden window
     * has not yet been created.
     */
    void destroyHiddenWindow();

    /**
     * Runs an application event loop: normally the main event pump which
     * defines the lifetime of the application. If there are no windows open
     * and no outstanding calls to enterLastWindowClosingSurvivalArea this
     * method will exit immediately.
     *
     * @returnCode NS_SUCCESS_RESTART_APP
     *             This return code indicates that the application should be
     *             restarted because quit was called with the eRestart flag.
     */
    void run();

    /**
     * There are situations where all application windows will be
     * closed but we don't want to take this as a signal to quit the
     * app. Bracket the code where the last window could close with
     * these.
     */
    void enterLastWindowClosingSurvivalArea();
    void exitLastWindowClosingSurvivalArea();

    /**
     * The amount of time, in milliseconds, that the last session took
     * to shutdown.  Reads as 0 to indicate failure.
     */
    readonly attribute PRUint32 lastShutdownDuration;

    /**
     * Startup Crash Detection
     *
     * Keeps track of application startup begining and success using flags to
     * determine whether the application is crashing on startup.
     * When the number of crashes crosses the acceptable threshold, safe mode
     * or other repair procedures are performed.
     */

    /**
     * Whether automatic safe mode is necessary at this time.  This gets set
     * in trackStartupCrashBegin.
     *
     * @see trackStartupCrashBegin
     */
    readonly attribute boolean automaticSafeModeNecessary;

    /**
     * Restart the application in safe mode
     * @param aQuitMode
     *        This parameter modifies how the app is shutdown.
     * @see nsIAppStartup::quit
     */
    void restartInSafeMode(in PRUint32 aQuitMode);

    /**
     * If the last startup crashed then increment a counter.
     * Set a flag so on next startup we can detect whether TrackStartupCrashEnd
     * was called (and therefore the application crashed).
     * @return whether safe mode is necessary
     */
    bool trackStartupCrashBegin();

    /**
     * We have succesfully started without crashing. Clear flags that were
     * tracking past crashes.
     */
    void trackStartupCrashEnd();

    /**
     * The following flags may be passed as the aMode parameter to the quit
     * method.  One and only one of the "Quit" flags must be specified.  The
     * eRestart flag may be bit-wise combined with one of the "Quit" flags to
     * cause the application to restart after it quits.
     */

    /**
     * Attempt to quit if all windows are closed.
     */
    const PRUint32 eConsiderQuit = 0x01;

    /**
     * Try to close all windows, then quit if successful.
     */
    const PRUint32 eAttemptQuit = 0x02;

    /**
     * Quit, damnit!
     */
    const PRUint32 eForceQuit = 0x03;

    /**
     * Restart the application after quitting.  The application will be
     * restarted with the same profile and an empty command line.
     */
    const PRUint32 eRestart = 0x10; 

    /**
     * When restarting attempt to start in the i386 architecture. Only supported
     * on OSX.
     */
    const PRUint32 eRestarti386 = 0x20;

    /**
     * When restarting attempt to start in the x86_64 architecture. Only
     * supported on OSX.
     */
    const PRUint32 eRestartx86_64 = 0x40;

    /**
     * Exit the event loop, and shut down the app.
     *
     * @param aMode
     *        This parameter modifies how the app is shutdown, and it is
     *        constructed from the constants defined above.
     */
    void quit(in PRUint32 aMode);

    /**
     * True if the application is in the process of shutting down.
     */
    readonly attribute boolean shuttingDown;

    /** 
     * Returns an object with main, process, firstPaint, sessionRestored properties.
     * Properties may not be available depending on platform or application
     */
    [implicit_jscontext] jsval getStartupInfo();

    /**
     * True if startup was interrupted by an interactive prompt.
     */
    attribute boolean interrupted;
};
