/*

* Copyright (c) 2006 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: 

*

*/

#include "transitionmanager.h"

#include <eikapp.h>

#include <aknappui.h>

#include <gfxtranseffect/gfxtranseffect.h>

#include <akntranseffect.h> // for Transition effect enumerations

#include <e32property.h>

#include <UikonInternalPSKeys.h> 

#include <featmgr.h>   

#include <pslninternalcrkeys.h>

#include <centralrepository.h>	

#include <apgwgnam.h>

#ifdef SYMBIAN_ENABLE_SPLIT_HEADERS

#include <vwsdefpartner.h>

#endif

//this class fix a memory leak:

//there were cases when exit effect was not called in 

//preparetoexit (inproper parent class, thanks (mostly) to C++)

//this class ensures that exit is called when enviroment statics are still alive

//great integration point to keep in mind!

NONSHARABLE_CLASS(CExitWatch) : public CCoeStatic

	{

	public:

		CExitWatch(MExit& aExit);

		~CExitWatch();

	private:

		MExit& iExit;

	};

const TUid KExitWatchStatic = 

				{

				0x100056C6	//this is avkon uid.... propably a new uid should be allocated.

				};

CExitWatch::CExitWatch(MExit& aExit) : CCoeStatic(KExitWatchStatic, 0xFFFFFFF), //just any priority > 100 is enough as tfx uses that

	 iExit(aExit)

	{

	}

CExitWatch::~CExitWatch()

	{

	iExit.DoExit();

	}

NONSHARABLE_CLASS(CCenRepListen) : public CActive, public MKeyValue

	{

	public:

		static CCenRepListen* NewL(const TUid& aRep, const TUint32 aKey, MKeyListener& aListener);

		TInt Value() const;

		TUint32 Key() const;

		void Listen();

		~CCenRepListen();

	private:

		CCenRepListen(const TUint32 aKey, MKeyListener& aListener);

		void ConstructL(const TUid& aRep);

		void DoCancel();

		void RunL();

	private:

		const TUint32 iKey;

		MKeyListener& iListener;

		TInt iValue;

		CRepository* iRepository;

	};

CCenRepListen* CCenRepListen::NewL(const TUid& aRep, const TUint32 aKey, MKeyListener& aListener)

	{

	CCenRepListen* l = new (ELeave) CCenRepListen(aKey, aListener);

	CleanupStack::PushL(l);

	l->ConstructL(aRep);

	CleanupStack::Pop();

	return l;

	}

TInt CCenRepListen::Value() const

	{

	return iValue;

	}

TUint32 CCenRepListen::Key() const

	{

	return iKey;

	}

void CCenRepListen::Listen()

	{

	Cancel();

	SetActive();

	iRepository->NotifyRequest(iKey, iStatus);

	}

CCenRepListen::CCenRepListen(const TUint32 aKey, MKeyListener& aListener) :

CActive(CActive::EPriorityStandard), iKey(aKey), iListener(aListener)

	{

	CActiveScheduler::Add(this);

	}

void CCenRepListen::ConstructL(const TUid& aRep)

	{

	iRepository = CRepository::NewL(aRep);

	User::LeaveIfError(iRepository->Get(iKey, iValue));

	}

void CCenRepListen::DoCancel()

	{

	iRepository->NotifyCancelAll();

	}

void CCenRepListen::RunL()

	{

	User::LeaveIfError(iRepository->Get(iKey, iValue));

	iListener.KeyChangedL(*this);

	}	

CCenRepListen::~CCenRepListen()

	{

	Cancel();

	delete iRepository;

	}

//////////////////////////////////////////////////////////////////////////

_LIT(KTfxServerName,"TfxServer");	

const TInt KLimit(100);	

NONSHARABLE_CLASS(CServerWait) : public CTimer

	{

	public:

		static TBool WaitL();

	private:

		CServerWait();

		void RunL();

	private:

		TInt iCount;

	};	

CServerWait::CServerWait() : CTimer(CActive::EPriorityIdle) 

	{

	CActiveScheduler::Add(this);

	}

TBool CServerWait::WaitL()

	{

	CServerWait* wait = new (ELeave) CServerWait();

	CleanupStack::PushL(wait);

	wait->ConstructL();

	wait->After(1);

	CActiveScheduler::Start();

	const TBool ok = wait->iCount <= KLimit;

	CleanupStack::PopAndDestroy(); //wait

	return ok;

	}

void CServerWait::RunL()

	{

	TFullName fullName;

	TFindServer find(KTfxServerName);

	if(iCount > KLimit || KErrNone == find.Next(fullName))

		{

		CActiveScheduler::Stop();

		}

	else

		{

		++iCount;

		After(10000);

		}

	}

///////////////////////////////////////////////////////////////////////////	

CTransitionManager* CTransitionManager::NewL(CEikonEnv& aEnv)

    {

    if(!FeatureManager::FeatureSupported(KFeatureIdUiTransitionEffects))

        return NULL; //this is only place where flag was used since calling it is slow, after that this ptr indicates its presense

    CTransitionManager* tm = new (ELeave) CTransitionManager(aEnv);

    CleanupStack::PushL(tm);

    tm->ConstructL();

    CleanupStack::Pop();

    return tm;

    }

CTransitionManager::CTransitionManager(CEikonEnv& aEnv) : iEikEnv(aEnv)

	{

	}

void CTransitionManager::AppStartupComplete()

	{

    TRAP_IGNORE( iEikEnv.EikAppUi()->AddViewObserverL( this ) );

	if(iFlags & EStarted)

		{

        iStartIdleState = ETransEffectWaitingForAppSwitch;

	    iFlags |= EStartupStarted;

		}

	else

		{

		iFlags |= (EStarted | EStartupStarted | EStartupComplete);

		GfxTransEffect::AbortFullScreen();

		}

	}

void CTransitionManager::ConstructL()

	{

	iAppStartupIdle = CIdle::NewL( CActive::EPriorityIdle );

	iCRListen = CCenRepListen::NewL(KCRUidThemes, KThemesTransitionEffects, *this);

	CheckEffectsL(EFalse);

	new (ELeave) CExitWatch(*this); //it is enviroment static, pointer to that is not needed 

	}

void CTransitionManager::DoExit()

	{

	if(iFlags & EStartupComplete && iAppUid != KNullUid)

		{

		RWsSession ses;

		if(KErrNone == ses.Connect())

			{

			TThreadId focusThreadId;

    		ses.GetWindowGroupClientThreadId(ses.GetFocusWindowGroup(), focusThreadId);

			RThread myThread;

    		if(myThread.Id() == focusThreadId)

    			{

				AppExit(AknTransEffect::EApplicationExit, iAppUid);

				}

			ses.Close();

			}

		}

	}

CTransitionManager::~CTransitionManager()

	{

	delete iCRListen;

    if(iAppStartupIdle != NULL)

    	{

    	iAppStartupIdle->Cancel();

    	}

    delete iAppStartupIdle;

	}

TBool CTransitionManager::AppStartupCb(TAny* aThis)

	{

	static_cast<CTransitionManager*>(aThis)->Startup();

	return EFalse;

	}

// Implementation of MCoeViewActivationObserver MCoeViewObserver

void CTransitionManager::HandleViewEventL( const TVwsViewEvent& aEvent )

    {

    switch( aEvent.iEventType )

        {

        case TVwsViewEvent::EVwsActivateView:

            // Appswitch has triggered flag so start idle callback

            if( iStartIdleState  == ETransEffectWaitingForViewSwitch)

                {

                if( !iAppStartupIdle->IsActive() )

                    {

                    iStartIdleState = ETransEffectWaitingForIdleCall;

                    iAppStartupIdle->Start( TCallBack( AppStartupCb, this ) );

                    }

                }

            else if( iStartIdleState == ETransEffectIdle && Ready() )

                // Wait for appswitch

                {

                iStartIdleState = ETransEffectWaitingForAppSwitch;

                }

            break;

        case TVwsViewEvent::EVwsDeactivateView:

            // Appswitch has triggered flag so start idle callback

            if( iStartIdleState  == ETransEffectWaitingForViewSwitch)

                {

                if( !iAppStartupIdle->IsActive() )

                    {

                    iStartIdleState = ETransEffectWaitingForIdleCall;

                    iAppStartupIdle->Start( TCallBack( AppStartupCb, this ) );

                    }

                }

            break;

        default:

            // Reset state if viewdeactivate to other app

            if( aEvent.iViewOneId.iAppUid != aEvent.iViewTwoId.iAppUid )

                {

                iStartIdleState = ETransEffectIdle;

                }

        break;

        }

    }

void CTransitionManager::SetEmbedded()

	{

	iFlags |= EEmbedded;

	}

void CTransitionManager::Startup()

	{

	if(!(iFlags & EStartupComplete))

		{

		const TInt group = iEikEnv.RootWin().Identifier();

		if(group != 0)

			{

	    	TWsEvent event;

	    	event.SetType(EEventNull);

	    	event.SetTimeNow();

	    	iEikEnv.WsSession().SendEventToWindowGroup(group, event);

			}

		}

	if( ( iEikEnv.AppUi() != NULL ) && ( static_cast<CAknAppUi*>(iEikEnv.AppUi())->IsForeground() ) )

		{

		iEikEnv.WsSession().Flush(); //ensure that all drawing commands will be in server

		GfxTransEffect::EndFullScreen();	 	

		}

	iFlags |= EStartupComplete;

    iStartIdleState = ETransEffectIdle;

	}

TBool CTransitionManager::IsFullScreen() const

	{

	return (iEikEnv.AppUi() != NULL && static_cast<CAknAppUi*>(iEikEnv.AppUi())->IsFullScreenApp());

	}	

void CTransitionManager::AppSwitch(TInt aContext/*, const TUid& aUid*/)	

    {

    // Set the parent again as it might be cleared by another embedded instance 

    // (with the same uid) on exit

    if ( iFlags & EEmbedded )

        {

        const TInt focusWGroupId = iEikEnv.WsSession().GetFocusWindowGroup();

        const TInt thisApplicationWgId = iEikEnv.RootWin().Identifier();

        if ( focusWGroupId == thisApplicationWgId )

            {

            SendAvkonInfo();

            }

        }

    if(Ready())

    	{

    	iEikEnv.WsSession().Flush(); 

    	if(aContext == AknTransEffect::EApplicationActivate && (iFlags & EStartupStarted)) 

        	{

            // If this is a plain switch without a previous appstart then just wait for view activate

            if( iStartIdleState == ETransEffectIdle )

                {

                iStartIdleState = ETransEffectWaitingForViewSwitch;

                }

            else if( iStartIdleState == ETransEffectWaitingForAppSwitch )

                {

                if( !iAppStartupIdle->IsActive() )

                    {

                    iStartIdleState = ETransEffectWaitingForIdleCall;

                    iAppStartupIdle->Start( TCallBack( AppStartupCb, this ) );

                    }

                }

            }

        }

    }

void CTransitionManager::AppStartup(TInt aContext, const TUid& aUid)

	{  

	ASSERT(!(iFlags & EStarted));

	ASSERT(aUid != KNullUid);

	iAppUid = aUid;

	//reset instance data e.g. emedded and fullscreen as those params

	//may vary per instance

	TInt flags = AknTransEffect::TParameter::EResetServerStats; 

	if(Ready())

	    {

	    if( aContext == AknTransEffect::EAppStartupBackground )

	        {

	        flags |= AknTransEffect::TParameter::ENoEffects;

	        GfxTransEffect::BeginFullScreen(aContext, TRect(0,0,0,0),

    	    AknTransEffect::EParameterAvkonInternal, AknTransEffect::GfxTransParam(aUid, flags)); 

	        }

	    else

    	    {

    		GfxTransEffect::BeginFullScreen(aContext, TRect(0,0,0,0),

    	        AknTransEffect::EParameterType, AknTransEffect::GfxTransParam(aUid, flags)); 

    	  	}

        iFlags |= EStarted;

	    }

	}

void CTransitionManager::KeyChangedL(const MKeyValue& aValue)

	{

	ASSERT(aValue.Key() == KThemesTransitionEffects);

	ASSERT(!(iFlags & EffectsEnabled));

	CheckEffectsL(ETrue);

	SendAvkonInfo();

	CheckFlags();

	}

void CTransitionManager::CheckEffectsL(TBool aWait)

	{

	if(!(iFlags & EffectsEnabled))

		{

		if(iCRListen->Value() & AknTransEffect::EFullScreenTransitionsOff)

			{

			iFlags &= ~EffectsEnabled;	

			iCRListen->Listen();

			}

		else if(!aWait || CServerWait::WaitL())

			{

			iFlags |= EffectsEnabled;	

			}

		}

	}

void CTransitionManager::SetAvkon()

	{	

	if(iAppUid != KNullUid && !(iFlags & EAvkonApp))

		{

		iFlags |= EAvkonApp;

		SendAvkonInfo();

		}

	}

void CTransitionManager::GetRootAppL(TUid& aRootAppUid)

	{

	RWsSession& ws = iEikEnv.WsSession();

	RWsSession::TWindowGroupChainInfo wgInfo = {0,0};

	wgInfo.iId = iEikEnv.RootWin().Identifier();

	TInt foundWgId = wgInfo.iId;

	RArray<RWsSession::TWindowGroupChainInfo> wgInfoArray;

	ws.WindowGroupList(&wgInfoArray);

	TInt index = wgInfoArray.Find(wgInfo);

	// Find the root window group

	while( index >= 0 )

		{

		foundWgId = wgInfo.iId;

		wgInfo.iId = wgInfoArray[index].iParentId;

		index = wgInfoArray.Find(wgInfo);

		} 	

	wgInfoArray.Close();

	CApaWindowGroupName* windowName = CApaWindowGroupName::NewLC(ws, foundWgId);

    aRootAppUid = windowName->AppUid();

	CleanupStack::PopAndDestroy();  //windowName

	}	

void CTransitionManager::SendAvkonInfo()

	{

	if((iFlags & EffectsEnabled) && (iAppUid != KNullUid) && (iFlags & EAvkonApp))

		{

#ifdef TFX_USE_WCHANGE_EVENT		

		TUid parentUid = KNullUid; 

		if(iFlags & EEmbedded)

			{ //set this app parent if emdded, thus server can go parent chain

			//and not to do switch effects between chain apps

			TRAP_IGNORE(GetRootAppL(parentUid));

			}	

		const TUint data[3] = {iAppUid.iUid, parentUid.iUid, iEikEnv.RootWin().Identifier()};

		const TPckgC<TUint[3]> buffer(data);

		GfxTransEffect::BeginFullScreen(AknTransEffect::ENone, 

	  		TRect(0,0,0,0),

	    	AknTransEffect::EParameterAvkonInternal,

	     	buffer);

#else

		TInt flags = AknTransEffect::TParameter::EAvkonCheck;

		TUid parentUid = KNullUid; 

		if(iFlags & EEmbedded)

			{ //set this app parent if emdded, thus server can go parent chain

			//and not to do switch effects between chain apps

			flags |= AknTransEffect::TParameter::EParentUid;

			TRAP_IGNORE(GetRootAppL(parentUid));

			}

		GfxTransEffect::BeginFullScreen(AknTransEffect::ENone, 

	  		TRect(0,0,0,0),

	    	AknTransEffect::EParameterType,

	     	AknTransEffect::GfxTransParam(iAppUid, parentUid, flags)); 

#endif	

		}

	}		

void CTransitionManager::SetDisableEffects(TBool aDisable)

	{

	if(iAppUid == KNullUid)