/*

* 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:  Data class to hold application root configuration info

*

*/

// User includes

#include "xnviewmanager.h"

#include "xnviewdata.h"

#include "xnappuiadapter.h"

#include "xncontroladapter.h"

#include "xnuiengine.h"

#include "xnecomhandler.h"

#include "xncomposer.h"

#include "xnodtparser.h"

#include "xndomdocument.h"

#include "xndomnode.h"

#include "xnodt.h"

#include "xnnode.h"

#include "xntype.h"

#include "xnpanic.h"

#include "xnplugindata.h"

#include "xnrootdata.h"

#include "debug.h"

// Constants

const TInt KScheduleInterval( 2000000 );

// ============================ LOCAL FUNCTIONS ================================

// ============================ MEMBER FUNCTIONS ===============================

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

// CXnRootData::NewL()

// Two-phased constructor.

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

//

CXnRootData* CXnRootData::NewL( CXnViewManager& aManager, 

    TUid aApplicationUid )

    {

    CXnRootData* self = CXnRootData::NewLC( aManager, aApplicationUid );

    CleanupStack::Pop( self );

    return self;

    }

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

// CXnRootData::NewLC()

// Two-phased constructor.

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

//

CXnRootData* CXnRootData::NewLC( CXnViewManager& aManager, 

    TUid aApplicationUid )

    {

    CXnRootData* self = new ( ELeave ) CXnRootData( aManager, aApplicationUid );

    CleanupStack::PushL( self );

    self->ConstructL();

    return self;

    }

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

// CXnRootData::CXnRootData()

// C++ default constructor

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

//

CXnRootData::CXnRootData( CXnViewManager& aManager, TUid aApplicationUid )     

    : CXnPluginData( aManager ), iApplicationUid( aApplicationUid )          

    {

    iFlags.Clear( EIsRemovable );

    }

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

// CXnRootData::~CXnRootData()

// C++ default destructor.

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

//

CXnRootData::~CXnRootData()

    {

    if ( iLoadTimer )

        {

        iLoadTimer->Cancel();

        }

    delete iLoadTimer;

    if ( iDestroyTimer )

        {

        iDestroyTimer->Cancel();

        }

    delete iDestroyTimer;

    iViewsToDestroy.ResetAndDestroy();

    iPluginsData.ResetAndDestroy();

    delete iODT->DomDocument().RootNode()->LayoutNode();

    delete iODT;

    delete iParser;

    delete iEcomHandler;

    User::Heap().Compress();

    }

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

// CXnRootData::ConstructL()

// 2nd phase constructor

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

//

void CXnRootData::ConstructL()

    {   

    CXnPluginData::ConstructL();

    iEcomHandler = CXnEcomHandler::NewL();

    iParser = CXnODTParser::NewL( iManager, *iEcomHandler );   

    iLoadTimer = CPeriodic::NewL( CActive::EPriorityLow );           

    iDestroyTimer = CPeriodic::NewL( CActive::EPriorityLow );

    }

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

// CXnRootData::Load()

// 

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

//

TInt CXnRootData::Load()

    { 

    if ( Occupied() )

        {

        return KErrInUse;

        }

    TInt err( KErrNone );

    // Load application root configuration

    TRAP( err, iODT = iManager.Composer().ComposeRootL( *this ) );

    if ( !iODT )

        {

        // Can't recover

        Panic( EXnInvalidConfiguration );                       

        }

    if ( !err )

        {

        TRAP( err, iManager.Parser().LoadRootL( *this, iApplicationUid ) );

        }

    if ( !err )

        {                

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

            {

            CXnViewData* plugin( 

                static_cast< CXnViewData* >( iPluginsData[ i ] ) ); 

            if ( plugin->Initial() )

                {

                err = plugin->Load();

                if ( plugin->Occupied() )

                    {

                    // Initial view is succesfully composed. Some plugins

                    // may have failed but it doesn't matter as those are removed                                        

                    return KErrNone;

                    }     

                // Initial view failed, remove it

                iPluginsData.Remove( i );

                delete plugin;

                plugin = NULL;                                                

                break;                             

                }

            }

        // Initial view loading failed, fallback to load any of the views

        while( iPluginsData.Count() )

            {

            CXnViewData* plugin( 

                static_cast< CXnViewData* >( iPluginsData[ 0 ] ) ); 

            // Ignore error

            plugin->Load();

            if ( plugin->Occupied() )

                {

                // Return error because of fallback condition                                

                return KXnErrPluginFailure;

                }

            // View failed, remove it

            iPluginsData.Remove( 0 );

            delete plugin;

            plugin = NULL;

            }        

        }

    else if ( err == KErrNoMemory )

        {

        ShowOutOfMemError();

        }

    // Configuration loading failed totally

    Panic( EXnInvalidConfiguration );

    return err;

    }

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

// CXnRootData::Destroy()

// 

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

//

void CXnRootData::Destroy()

    {

    iLoadTimer->Cancel();

    iDestroyTimer->Cancel();

    iFlags.Set( EIsDispose );

    iDestroyTimer->Start( TTimeIntervalMicroSeconds32( 0 ),

                          TTimeIntervalMicroSeconds32( 0 ),

                          TCallBack( RunDestroyL, this ) );           

    }

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

// CXnRootData::LoadRemainingViews()

// 

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

//

void CXnRootData::LoadRemainingViews()

    {

    if ( iFlags.IsClear( EIsDispose ) && !AllViewsLoaded() )

        {

        iLoadForward = ETrue;

        iLoadTimer->Cancel();

        iLoadTimer->Start( TTimeIntervalMicroSeconds32( KScheduleInterval ),

                           TTimeIntervalMicroSeconds32( KScheduleInterval ),

                           TCallBack( RunLoadL, this ) );       

        }

    }

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

// CXnRootData::CancelLoadRemainingViews()

// 

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

//

void CXnRootData::CancelLoadRemainingViews()

    {    

    if ( iFlags.IsClear( EIsDispose ) && !AllViewsLoaded() )

        {

        iLoadTimer->Cancel();

        }

    }

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

// CXnRootData::ODT()

// 

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

//

CXnODT* CXnRootData::ODT() const

    {

    return iODT;

    }

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

// CXnRootData::RootNode()

// 

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

//

CXnNode* CXnRootData::RootNode() const

    {

    return iODT->DomDocument().RootNode()->LayoutNode();

    }

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

// CXnRootData::Parser()

// 

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

//

CXnODTParser& CXnRootData::Parser() const

    {

    return *iParser;

    }

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

// CXnRootData::EcomHandler()

// 

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

//

CXnEcomHandler& CXnRootData::EcomHandler() const

    {

    return *iEcomHandler;

    }

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

// CXnRootData::ActiveViewData()

// Finds the active view data

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

//

CXnViewData& CXnRootData::ActiveViewData() const

    {    

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

        {

        CXnViewData& plugin( static_cast< CXnViewData& >( *iPluginsData[i] ) );

        if ( plugin.Active() )

            {

            return plugin;

            }

        }

    // If active is not set, then try initial

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

        {

        CXnViewData& plugin( static_cast< CXnViewData& >( *iPluginsData[i] ) );

        if ( plugin.Initial() )

            {

            return plugin;

            }

        }

    Panic( EXnInvalidConfiguration );

    // Remove compiler warning

    return static_cast< CXnViewData& > ( *iPluginsData[0] );

    }

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

// CXnRootData::PreviousViewData()

// Finds the active view data

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

//

CXnViewData& CXnRootData::PreviousViewData() const

    {      

    CXnViewData& active( ActiveViewData() );

    TInt count( iPluginsData.Count() );

    if ( count == 1 )

        {

        // Only one view available

        return active;               

        }

    TInt index( iPluginsData.Find( &active ) );

    if ( index == 0 )

        {

        // Return the last

        return static_cast< CXnViewData& >( *iPluginsData[ count - 1 ] );        

        }

    else

        {

        // Return the previous

        return static_cast< CXnViewData& >( *iPluginsData[ index - 1 ] );        

        }

    }

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

// CXnRootData::NextViewData()

// Finds the active view data

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

//

CXnViewData& CXnRootData::NextViewData() const

    {       

    CXnViewData& active( ActiveViewData() );

    TInt count( iPluginsData.Count() );

    if ( count == 1 )

        {

        // Only one view available

        return active;

        }

    TInt index( iPluginsData.Find( &active ) );

    if ( index + 1 < count )

        {

        // Return the next

        return static_cast< CXnViewData& >( *iPluginsData[ index + 1 ] );        

        }

    else

        {

        // Return the first

        return static_cast< CXnViewData& >( *iPluginsData[ 0 ] );        

        }

    }

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

// CXnRootData::DestroyViewData()

// Sets view data to be destroyed

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

//

void CXnRootData::DestroyViewData( CXnViewData* aViewData )

    {

    TInt index( iPluginsData.Find( aViewData ) );

    if ( index != KErrNotFound )

        {

        iPluginsData.Remove( index );

        if ( iViewsToDestroy.Find( aViewData ) == KErrNotFound )

            {

            iViewsToDestroy.Append( aViewData );

            iDestroyTimer->Cancel();

            iDestroyTimer->Start( TTimeIntervalMicroSeconds32( 0 ),

                                  TTimeIntervalMicroSeconds32( 0 ),

                                  TCallBack( RunDestroyL, this ) );                       

            }        

        }       

    }

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

// CXnRootData::AllViewsLoaded()

// 

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

//

TBool CXnRootData::AllViewsLoaded() const

    {

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

        {

        if ( !iPluginsData[i]->Occupied() )

            {

            return EFalse;

            }

        }

    return ETrue;

    }

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

// CXnRootData::AllViewsDestroyed()

// 

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

//

TBool CXnRootData::AllViewsDestroyed() const

    {

    return ( iPluginsData.Count() == 0 ) && iFlags.IsSet( EIsDispose ); 

    }

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

// CXnRootData::RunLoadL()

// 

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

//

/* static */ TInt CXnRootData::RunLoadL( TAny* aAny )

    {

    __PRINTS( "*** CXnRootData::RunLoadL" );

    CXnRootData* self = static_cast< CXnRootData* >( aAny );

    if ( self->iFlags.IsSet( EIsDispose ) )

        {

        self->iLoadTimer->Cancel();

        }

    else

        {               

        CXnPluginData& active( self->ActiveViewData() );

        CXnPluginData* toLoad( NULL );

        TInt index( self->iPluginsData.Find( &active ) );

        TInt count( self->iPluginsData.Count() );

        if ( self->iLoadForward )

            {

            self->iLoadForward = EFalse;

            // Start from the next one

            index = index + 1;

            if ( index == count )

                {

                index = 0;

                }

            for ( TInt i = index; i < self->iPluginsData.Count(); i++ )

                {

                if ( !self->iPluginsData[i]->Occupied() )

                    {

                    toLoad = self->iPluginsData[i];

                    break;

                    }

                }                              

            }

        else

            {

            self->iLoadForward = ETrue;

            if ( index == 0 )

                {

                index = count - 1;

                }

            else

                {

                index = index - 1;