/*

* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Classes for executing GOOM actions (e.g. closing applications and running plugins).

*

*/

#include <apgtask.h>

#include "goommemorymonitor.h"

#include "goomwindowgrouplist.h"

#include "goomcloseapp.h"

#include "goomtraces.h"

#include "goomappclosetimer.h"

#include "goomappclosewatcher.h"

#include "goomactionref.h"

CGOomCloseApp* CGOomCloseApp::NewL(MGOomActionObserver& aStateChangeObserver, RWsSession& aWs)

    {

    FUNC_LOG;

    CGOomCloseApp* self = new (ELeave) CGOomCloseApp(aStateChangeObserver, aWs);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

    }

// Close the application in order to free memory

// Call the CGOomAction::MemoryFreed when it is done

void CGOomCloseApp::FreeMemory(TInt, TBool)

    {

    FUNC_LOG;

    if ( iAlreadyGaveUp )	//will this ever be true ??? iAlredyGaveup is set true in closeAppEvent, which is called only if app gets notified by goom, which happens only after this

        {

        if (iAppCloseTimer)

        	{

			iAppCloseTimer->Cancel();

    		}

    	if (iAppCloseWatcher)

        	{

			iAppCloseWatcher->Cancel();

			}

		RDebug::Printf("GOOM: I should not activate actions for app that already refused to exit !!!!");

        MemoryFreed(KErrNone);

        return;

        }    

    iAppCloserRunning = ETrue;

    // Set the TApaTask to the app

    iCurrentTask.SetWgId(iWgId);

    // Start a timer and the thread watcher 

    /*

	iAppCloseTimer->SetState(CGOomAppCloseTimer::EGOomAppClosing);

    iAppCloseTimer->After(iCloseTimeout * 1000);

    iAppCloseWatcher->Start(iCurrentTask);

    // Tell the app to close

    TRACES2("CGOomCloseApp::FreeMemory: Closing app with window group id %d Timeout = %d",iWgId, iCloseTimeout);

    iCurrentTask.EndTask();

	*/

	ConditionalClose();

    }

CGOomCloseApp::~CGOomCloseApp()

    {

    FUNC_LOG;

    if (iAppCloseTimer)

        iAppCloseTimer->Cancel();

    if (iAppCloseWatcher)

        iAppCloseWatcher->Cancel();

    delete iAppCloseTimer;    

    delete iAppCloseWatcher;

    }

// Callback from CGOomAppCloseWatcher and CGOomAppCloseTimer

void CGOomCloseApp::CloseAppEvent()

    {

    FUNC_LOG;

    // The application has closed (or we have a timeout)

    iAppCloserRunning = EFalse;

    iAlreadyGaveUp = ETrue;

    if (iAppCloseTimer)

        {

        iAppCloseTimer->Cancel();

        iAppCloseTimer->SetState(CGOomAppCloseTimer::EGOomAppKilled);

        iAppCloseTimer->After(iWaitAfterClose * 1000);

        }

    if (iAppCloseWatcher)

        {

        iAppCloseWatcher->Cancel(); 

        }    

    }

void CGOomCloseApp::Reconfigure(const TActionRef& aRef)

    {

    FUNC_LOG;

    iWgId = aRef.WgId();    

    iCloseTimeout = aRef.CloseTimeout();

    iWaitAfterClose = aRef.WaitAfterClose();

	iAlreadyGaveUp = EFalse;

    }

void CGOomCloseApp::ConstructL()

    {

    FUNC_LOG;

    iAppCloseTimer = CGOomAppCloseTimer::NewL(*this);

    iAppCloseWatcher = new(ELeave) CGOomAppCloseWatcher(*this);

    }

CGOomCloseApp::CGOomCloseApp(MGOomActionObserver& aStateChangeObserver, RWsSession& aWs)

                                : CGOomAction(aStateChangeObserver), iCurrentTask(aWs)

    {

    FUNC_LOG;

    }

TBool IsConsumingMemory(TInt aWgId)

    {

    FUNC_LOG;

    // Something more efficient could be done here

    CMemoryMonitor* globalMemoryMonitor = static_cast<CMemoryMonitor*>(Dll::Tls());

    globalMemoryMonitor->GetWindowGroupList()->Refresh();

    return (globalMemoryMonitor->GetWindowGroupList()->GetIndexFromWgId(aWgId) != KErrNotFound);

    }    

void CGOomCloseApp::ConditionalClose()

    {

    FUNC_LOG;

    // Start a timer and the thread watcher 

    iAppCloseTimer->SetState(CGOomAppCloseTimer::EGOomAppClosing);

    iAppCloseTimer->After(iCloseTimeout * 1000);

    // Tell the app to close

	// We are not asking system applications to exit anyway, so we'll send legacy event only

	// even we have powermgmt capability 

    TRACES2("CGOomCloseApp::FreeMemory: Closing app with window group id %d Timeout = %d",iWgId, iCloseTimeout);

	TWsEvent event;

	event.SetType(EEventUser);

	TInt* eventData = (TInt*)(event.EventData());

	*eventData = EApaSystemEventShutdown;

	eventData++;

	*eventData = KGoomMemoryLowEvent;

	// should proxy the session..

    CMemoryMonitor* globalMemoryMonitor = static_cast<CMemoryMonitor*>(Dll::Tls());

    globalMemoryMonitor->iWs.SendEventToWindowGroup(iWgId, event);

    }    

// ----------------------------------------------

// Callback from iAppCloseTimer

// App refused to exit gracefully on given time

// ----------------------------------------------

//

void CGOomCloseApp::KillTask()

    {

    FUNC_LOG;

    if (iAppCloseWatcher)

        {

        iAppCloseWatcher->Cancel(); 

        }

    if(IsConsumingMemory(iWgId))    

        iCurrentTask.KillTask();

        iAppCloserRunning = EFalse; // not sure if intended (?)

        iAppCloseTimer->SetState(CGOomAppCloseTimer::EGOomAppKilled);

        iAppCloseTimer->After(iWaitAfterClose * 1000);

        }

    else

        { // application has released its graphics resources -> we are no more interested about it

        }    

    }

void CGOomCloseApp::KillTaskWaitDone()

    {

    FUNC_LOG;

    MemoryFreed(KErrNone);

    }