/*

* 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:  Task monitor engine

 *

*/

#include "tsfswengine.h"

#include "tsfsalwaysshownapplist.h"

#include "tsfshiddenapplist.h"

#include "tsfswidgetlist.h"

#include "tspreviewprovider.h"

#include "tsfswclient.h"

#include <apgtask.h>

#include <AknDef.h>

#include <apgwgnam.h>

#include <mmf/common/mmfcontrollerpluginresolver.h> // for CleanupResetAndDestroyPushL

#include <featmgr.h>

#include <swi/swispubsubdefs.h>

#include <s32mem.h>

#include <bitmaptransforms.h>

#include "enginelogging.h"

// time to wait before refreshing content

// for screenshots, they are scaled down to (screensize/this_factor).

const TInt KScreenSizeFactor = 2;

// format to get a lowercase hex string prefixed with 0x

_LIT( KHexFmt, "0x%x" );

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

// CTsFswEngine::NewL

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

//

EXPORT_C CTsFswEngine* CTsFswEngine::NewL( MTsFswEngineObserver& aObserver )

    {

    CTsFswEngine* self = NewLC( aObserver );

    CleanupStack::Pop( self );

    return self;

    }

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

// CTsFswEngine::NewLC

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

//

EXPORT_C CTsFswEngine* CTsFswEngine::NewLC( MTsFswEngineObserver& aObserver )

    {

    CTsFswEngine* self = new ( ELeave ) CTsFswEngine( aObserver );

    CleanupStack::PushL( self );

    self->ConstructL();

    return self;

    }

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

// CTsFswEngine::CTsFswEngine

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

//

CTsFswEngine::CTsFswEngine( MTsFswEngineObserver& aObserver )

        : CActive( EPriorityStandard ), iObserver( aObserver )

    {

    CActiveScheduler::Add( this );

    }

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

// CTsFswEngine::ConstructL

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

//

void CTsFswEngine::ConstructL()

    {

    iEnv = CEikonEnv::Static();

    User::LeaveIfError( iWsSession.Connect() );

    User::LeaveIfError( iAppArcSession.Connect() );

    iWidgetsSupported = FeatureManager::FeatureSupported( KFeatureIdWebWidgets );

    // get an initial list of tasks

    CollectTasksL();

    // listen for app screenshots

    iPreviewProvider = CTsFastSwapPreviewProvider::NewL( *this );

    SetPreviewParams();

    UpdatePreviewContent();

    iUpdateStarter = CPeriodic::NewL( CActive::EPriorityStandard );

    // start listening for swi ps property

    if ( iSwiProp.Attach( KUidSystemCategory,

            Swi::KUidSoftwareInstallKey ) == KErrNone )

        {

        iSwiProp.Subscribe( iStatus );

        SetActive();

        }

    }

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

// CTsFswEngine::~CTsFswEngine

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

//

CTsFswEngine::~CTsFswEngine()

    {

    Cancel();

    iSwiProp.Close();

    delete iUpdateStarter;

    delete iPreviewProvider;

    iWgIds.Close();

    iAppArcSession.Close();

    iWsSession.Close();

    for ( TInt i = 0; i < iRotaTasks.Count(); i++ )

        {

        iRotaTasks[i]->Cancel();

        delete iRotaTasks[i];

        }

    iRotaTasks.Close();

    }

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

// CTsFswEngine::FswDataL

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

//

EXPORT_C const RTsFswArray& CTsFswEngine::FswDataL()

    {

    TSLOG_CONTEXT( FswDataL, TSLOG_LOCAL );

    TSLOG_OUT();

    }

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

// CTsFswEngine::CloseAppL

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

//

EXPORT_C void CTsFswEngine::CloseAppL( TInt aWgId )

    {

    TSLOG_CONTEXT( CloseAppL, TSLOG_LOCAL );

    TSLOG1_IN( "aWgId = %d", aWgId );

    if( iWidgetsSupported && 0 > aWgId )

        {

        // convert aWgId to an index in the list of running widgets and close widget

        CloseWidgetL( -aWgId -1 );

        }

        {

        // send window group event to kill the app

        TWsEvent event;

        event.SetTimeNow();

        event.SetType( KAknShutOrHideApp );

        iEnv->WsSession().SendEventToWindowGroup( aWgId, event );

        TSLOG0( TSLOG_INFO, "event sent to wg" );

        }

    TSLOG_OUT();

    }

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

// CTsFswEngine::SwitchToAppL

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

//

EXPORT_C void CTsFswEngine::SwitchToAppL( TInt aWgId )

    {

    TSLOG_CONTEXT( SwitchToAppL, TSLOG_LOCAL );

    TSLOG1_IN( "aWgId = %d", aWgId );

    if ( iWidgetsSupported && aWgId < 0 )

        {

        // for widgets clients see a wgid that is -1*(index+1)

        // convert aWgId to an index in the list of running widgets

        TInt idx = -aWgId - 1;

        // if index is valid then handle the widget specially

        if ( idx >= 0 && idx < arr.Count() )

            {

            SwitchToWidgetL( idx );

            TSLOG1_OUT( "switched to widget %d", idx );

            return;

            }

        }

    TApaTask task( iEnv->WsSession() );

    task.SetWgId( aWgId );

    task.BringToForeground();

    TSLOG_OUT();

    }

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

// CTsFswEngine::SwitchToWidgetL

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

//

void CTsFswEngine::SwitchToWidgetL( TInt aWidgetIndex )

    {

    CApaCommandLine* cmdLine = CApaCommandLine::NewLC();

    cmdLine->SetCommandL( EApaCommandRun );

    TApaAppInfo info;

    iAppArcSession.GetAppInfo( info, arr[aWidgetIndex]->iUid ); // codescanner::accessArrayElementWithoutCheck2 (aWidgetIndex checked in SwitchToAppL())

    cmdLine->SetExecutableNameL( info.iFullName );

    }

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

// CTsFswEngine::UpdateTaskList

// Callback from appui

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

//

void CTsFswEngine::UpdateTaskList()

    {

    TSLOG_CONTEXT( UpdateTaskList, TSLOG_LOCAL );

    TSLOG_IN();

        {

                TCallBack( UpdateStarterCallback, this ) );

        }

    // screenshot taking support - call Register and Unregister when needed

    UpdatePreviewContent();

    // get the foreground app uid and publish it to CFW if different than before

    TRAP_IGNORE( PublishFgAppUidL() );

    TSLOG_OUT();

    }

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

// CTsFswEngine::ForegroundAppUidL

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

//

EXPORT_C TUid CTsFswEngine::ForegroundAppUidL( TInt aType )

    {

    // Do not use GetFocusWindowGroup or others.

    // We want to see only "real" application uids in FgApp,

    // i.e. stuff that would also be shown in the task swapper

    // area of Taskswitcher.

    TUid result = KNullUid;

    RArray<RWsSession::TWindowGroupChainInfo> allWgIds;

    CleanupClosePushL( allWgIds );

    User::LeaveIfError( iWsSession.WindowGroupList( 0, &allWgIds ) );

    TInt count = allWgIds.Count();

    for ( TInt i = 0; i < count; ++i )

        {

        // Depending on aType we may not need to bother with iParentId here.

        // If aType == EUseEmbeddedUid => embedded apps are treated as others.

        // If aType == EUseStandaloneUid => embedded apps must be ignored.

        if ( allWgIds[i].iParentId > 0

                && aType == CTsFswClient::EUseStandaloneUid )

            {

            continue;

            }

        CApaWindowGroupName* wgn = CApaWindowGroupName::NewLC(

            iWsSession, allWgIds[i].iId );

        TUid newUid = wgn->AppUid();

            newUid, iWsSession, allWgIds[i].iId );

        CleanupStack::PopAndDestroy( wgn );

        if ( !hidden && newUid.iUid )

            {

            result = newUid;

            break;

            }

        }

    CleanupStack::PopAndDestroy( &allWgIds );

    return result;

    }

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

// CTsFswEngine::PublishFgAppUidL

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

//

void CTsFswEngine::PublishFgAppUidL()

    {

    TSLOG_CONTEXT( PublishFgAppUidL, TSLOG_LOCAL );

    TSLOG_IN();

    TUid newUid = ForegroundAppUidL( CTsFswClient::EUseEmbeddedUid );

    TSLOG2( TSLOG_INFO, "ws says: %x we have: %x", newUid.iUid, iFgAppUid.iUid );

    if ( iFgAppUid != newUid && newUid.iUid )

        {

        iFgAppUid = newUid;

        iFgAppUidStr.Format( KHexFmt, iFgAppUid.iUid );

        }

    TSLOG_OUT();

    }

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

// CTsFswEngine::UpdateStarterCallback

// Callback for the timer

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

//

TInt CTsFswEngine::UpdateStarterCallback( TAny* aParam )

    {

    CTsFswEngine* self = static_cast<CTsFswEngine*>( aParam );

    self->iUpdateStarter->Cancel();

    // get list of tasks and notify observer if there is a change in the list

    TBool changed = EFalse;

    TRAPD( err, changed = self->CollectTasksL() );

    if ( err == KErrNone && changed )

        {

        self->iObserver.FswDataChanged();

        }

    return 0;

    }

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

// CTsFswEngine::CollectTasksL

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

//

TBool CTsFswEngine::CollectTasksL()

    {

    TSLOG_CONTEXT( CollectTasksL, TSLOG_LOCAL );

    TSLOG1_OUT( "change flag = %d", changed );

    return changed;

    }

// CTsFswEngine::HiddenAppListUpdated

// Callback from the hidden app list watcher

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

//

void CTsFswEngine::HiddenAppListUpdated()

    {

    UpdateTaskList();

    }

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

// CTsFswEngine::AppUidForWgIdL

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

//

TUid CTsFswEngine::AppUidForWgIdL( TInt aWgId )

    {

    CApaWindowGroupName* windowName =

        CApaWindowGroupName::NewLC( iWsSession, aWgId );

    TUid appUid = windowName->AppUid();

    CleanupStack::PopAndDestroy( windowName );

    return appUid;

    }

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

// CTsFswEngine::FindAppNameLC

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

//

HBufC* CTsFswEngine::FindAppNameLC( CApaWindowGroupName* aWindowName,

                                  const TUid& aAppUid,

                                  TInt aWgId )

    {

    //Retrieve the app name

    TApaAppInfo info;

    iAppArcSession.GetAppInfo( info, aAppUid );

    TPtrC caption = info.iShortCaption;

    HBufC* tempName = 0;

    if ( !caption.Length() && aWindowName ) // if not set - use thread name instead

        {

        if ( aWindowName->Caption().Length() )

            {

            tempName = aWindowName->Caption().AllocL();

            //put on cleanupstack after the if

            }

        else

            {

            TThreadId threadId;

            TInt err = iWsSession.GetWindowGroupClientThreadId(

                    aWgId, threadId );

            if ( err == KErrNone )

                {

                RThread thread;

                CleanupClosePushL( thread );

                err = thread.Open ( threadId );

                if ( err==KErrNone )

                    {

                    tempName = thread.Name().AllocL(); // codescanner::forgottoputptroncleanupstack

                    // tempName put on cleanupstack after the if

                    }

                CleanupStack::PopAndDestroy( &thread );

                }

            }

        }

    else

        {

        tempName = caption.AllocL();

        //put on cleanupstack after the if

        }

    CleanupStack::PushL( tempName );

    return tempName;

    }

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

// CTsFswEngine::CopyBitmapL

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

//

CFbsBitmap* CTsFswEngine::CopyBitmapL( TInt aFbsHandle, TBool aKeepAspectRatio )

    {

    CFbsBitmap* ret = new (ELeave) CFbsBitmap;

    CleanupStack::PushL( ret );

    CFbsBitmap* bmp = new (ELeave) CFbsBitmap;

    CleanupStack::PushL( bmp );

    User::LeaveIfError( bmp->Duplicate( aFbsHandle ) );

    //Make bitmap width and height equal so that it will look better in FSW control.

    TSize size  = bmp->SizeInPixels();

    if ( !aKeepAspectRatio )

        {

        if ( size.iHeight > size.iWidth )

            {

            size.iHeight = size.iWidth;

            }

        else

            {

            size.iWidth = size.iHeight;

            }

        }

    // preserve size and mode

    User::LeaveIfError( ret->Create( size, EColor64K ) );

    CFbsBitmapDevice* doubleBufferDev = CFbsBitmapDevice::NewL( ret );

    CleanupStack::PushL( doubleBufferDev );

    CFbsBitGc* doubleBufferGc = 0;

    User::LeaveIfError( doubleBufferDev->CreateContext( doubleBufferGc ) );

    CleanupStack::PushL( doubleBufferGc );

    // preserve size

    doubleBufferGc->BitBlt( TPoint( 0, 0 ), bmp, TRect(size) );

    CleanupStack::PopAndDestroy( doubleBufferGc );

    CleanupStack::PopAndDestroy( doubleBufferDev );

    CleanupStack::PopAndDestroy( bmp );

    CleanupStack::Pop( ret );

    return ret;

    }

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

// CTsFswEngine::UpdatePreviewContent

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

//

void CTsFswEngine::UpdatePreviewContent()

    {

    TSLOG_CONTEXT( UpdatePreviewContent, TSLOG_LOCAL );

    TSLOG_IN();

    RArray<RWsSession::TWindowGroupChainInfo> allWgIds;

    if ( iWsSession.WindowGroupList( 0, &allWgIds ) == KErrNone )

        {

        // check window groups that do not exist anymore

        for ( TInt i = 0, ie = iWgIds.Count(); i != ie; ++i )

            {

            TInt wgid = iWgIds[i];

            TBool present = EFalse;

            for ( TInt j = 0, je = allWgIds.Count(); j != je; ++j )

                {

                if ( allWgIds[j].iId == wgid )

                    {

                    present = ETrue;

                    break;

                    }

                }

            if ( !present )

                {

                TSLOG1( TSLOG_INFO, "unregister: %d", wgid );

                iPreviewProvider->Unregister( wgid );

                }

            }

        // check topmost window group

        if ( allWgIds.Count() )

            {

            if ( !iWgIds.Count() || allWgIds[0].iId != iWgIds[0] )

                {

                TInt wgid = allWgIds[0].iId;

                TSLOG1( TSLOG_INFO, "registering %d", wgid );

                iPreviewProvider->Register( wgid );

                }

            }