/*

* Copyright (c) 2007-2008 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:   Class that provides centralized access for UI classes 

*                to logic handling

*

*/

// INCLUDE FILES

#include <eikenv.h>

#include <coeaui.h>

#include <coemain.h>

#include <barsread.h>

#include <eikmenup.h> 

#include "cimcvmenuextensionmanager.h"

#include "cimcvcommandinfo.h"

#include "cvmenucommandinfo.hrh"

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

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

// CIMCVMenuExtensionManager::CIMCVMenuExtensionManager

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

// 

CIMCVMenuExtensionManager::CIMCVMenuExtensionManager( )

: iNewCommands( ECVMenuExtensionFirstFreeCommand )

    {

    }

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

// CIMCVMenuExtensionManager::ConstructL

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

// 

void CIMCVMenuExtensionManager::ConstructL()

    {   

    LoadPluginL( ); 

    }

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

// CIMCVMenuExtensionManager::NewL

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

// 

CIMCVMenuExtensionManager* CIMCVMenuExtensionManager::NewL( )

    { 

    CIMCVMenuExtensionManager* self = NewLC(  );

    CleanupStack::Pop(self);

    return self;

    }

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

// CIMCVMenuExtensionManager::NewLC

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

// 

CIMCVMenuExtensionManager* CIMCVMenuExtensionManager::NewLC()

    {

    CIMCVMenuExtensionManager* self =

        new (ELeave) CIMCVMenuExtensionManager(  );

    CleanupStack::PushL( self );

    self->ConstructL();

    return self;

    }

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

// CIMCVMenuExtensionManager::~CIMCVMenuExtensionManager

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

// 

CIMCVMenuExtensionManager::~CIMCVMenuExtensionManager()

    {   

    iCommandIdMap.ResetAndDestroy();

    iCommandIdMap.Close();

    // Reset and destroy the contents of the owned arrays,

    // this will delete the plugins.

    iPlugins.ResetAndDestroy();

    iPlugins.Close();

    // Close the ECOM interface

    REComSession::FinalClose();

    }

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

// CIMCVMenuExtensionManager::LoadPluginL

// Loads all plugins

// (other items were commented in a header).

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

//

void CIMCVMenuExtensionManager::LoadPluginL( )

    {

    // plugininfo array, Owned

    RImplInfoPtrArray pluginInfo;

    iPlugins.ResetAndDestroy();

    REComSession::ListImplementationsL( KMenuCustomisationInterfaceUid,pluginInfo );

    TInt pluginCount = pluginInfo.Count();

    for ( TInt pluginIndex(0); pluginIndex < pluginCount; ++pluginIndex )

        {

        TUid pluginUid = pluginInfo[pluginIndex]->ImplementationUid();

        // Creates the plugin and transfers ownership of the services

        // object to the plugin.

        CIMCVMenuExtension* plugin = NULL;

        TRAPD(error, plugin = CIMCVMenuExtension::CreateImplementationL( pluginUid ));

        if(KErrNone != error)

            {

            // handle the error here.

            }

        else

            {

            //if its here its sure that plugin is not null;

            CleanupStack::PushL( plugin);

            //map the plugin commands to CV commands,

            //assings the command maintained in the commandpool,

            //for more details see 

            MapCommandL(*plugin,pluginUid.iUid);

            //add the plugin to the array

            CPluginInfo* newPlugin = new ( ELeave ) CIMCVMenuExtensionManager::CPluginInfo( plugin, pluginUid);    

            CleanupStack::PushL( newPlugin );

            iPlugins.AppendL( newPlugin );

            CleanupStack::Pop( newPlugin );

            CleanupStack::Pop( plugin );

           }

        }

    }

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

// CIMCVMenuExtensionManager::OfferMenuPaneToPluginsL

// Generates the list of active plugins

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

//

void CIMCVMenuExtensionManager::OfferMenuPaneToPlugins(TInt aPreviousId, CEikMenuPane& aMenuPane,TUint aServiceId)

    {

    // Get the number of  plugins

    const TInt count = iPlugins.Count();

    // Loop though all the command handlers, If DynInitMenuPaneL leaves for one plugin, a plugin

    // error message will be displayed and the loop will continue with

    // the next command handler. If none of the plugins leave, there will

    // be only one TRAP used.

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

        {

        //trap is required if one plugin leaves then it should continue with other plugins.

        TRAPD(error,iPlugins[index]->Plugin().DynInitMenuPaneL( aPreviousId,

                                                             aMenuPane,aServiceId ));

        if(KErrNone != error)

            {

            //display the appropriate error note for leaving;

            }

        }

    }

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

// CIMCVMenuExtensionManager::OfferHandleCommandToPluginsL

// Generates the list of active plugins

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

//

TBool CIMCVMenuExtensionManager::OfferHandleCommandToPlugins(TInt aCommandId)

    {

     //Get the number of plugins loaded

     const TInt count = iPlugins.Count();

     TBool retval = EFalse;

     // Loop though all the command handlers, 

     // If HandleCommandL leaves for one plugin, a plugin

     // error message will be displayed and the loop will continue with

     // the next plugin. If none of the plugins leave, there will

     // be only one TRAP used.

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

         {

         TRAPD( error,retval = iPlugins[index]->Plugin().HandleCommandL( aCommandId ));

         if ( KErrNone != error )

             {

             // Report a problem with plugin.

             }

         }

     return retval;

    }

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

// CIMCVMenuExtensionManager::CPluginInfo::CPluginInfo(

// C++ constructor

// (other items were commented in a header).

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

//

CIMCVMenuExtensionManager::CPluginInfo::CPluginInfo( 

        CIMCVMenuExtension* aPlugin,

        TUid aPluginUid )

: iPlugin( aPlugin ),

iPluginUid( aPluginUid )

            {

            }

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

// CIMCVMenuExtensionManager::CPluginInfo::~CPluginInfo(

// C++ destructor

// (other items were commented in a header).

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

//

CIMCVMenuExtensionManager::CPluginInfo::~CPluginInfo() 

    {

    delete iPlugin;

    }

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

// CIMCVMenuExtensionManager::CPluginInfo::Plugin

// returns a reference to the plugin

// (other items were commented in a header).

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

//

CIMCVMenuExtension& CIMCVMenuExtensionManager::CPluginInfo::Plugin()

    {

     return *iPlugin;

    }

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

// CIMCVMenuExtensionManager::MapCommandL

// (other items were commented in a header).

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

// 

void CIMCVMenuExtensionManager::MapCommandL( CIMCVMenuExtension& aMenuExtension, TInt32  aPluginId )

    { 

    TInt res = aMenuExtension.CommandInfoResource();

    if( res != KErrNotFound )

        {

        TResourceReader reader;

        CCoeEnv::Static()->CreateResourceReaderLC( reader, res );

        TInt resCount = reader.ReadInt16();

        for( TInt j = 0; j < resCount; j++ )

            {

            CIMCVCommandInfo* commandInfo = NULL;

            commandInfo = CIMCVCommandInfo::NewLC( reader,

                                                aPluginId,

                                                iNewCommands );

            User::LeaveIfError( iCommandIdMap.Append( commandInfo ) );

            CleanupStack::Pop(); // commandInfo

            }

        CleanupStack::PopAndDestroy(); // reader                        

        aMenuExtension.RegisterCommandMapper( *this );

        }

    }

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

// CIMCVMenuExtensionManager::GetNewCommand

// from MComandMapper

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

//

TInt CIMCVMenuExtensionManager::GetOldCommand( TInt32 aPluginId, TInt aNewCommand,

                                    TInt& aOldCommand ) const

    {

    TInt mapCount = iCommandIdMap.Count();

    TInt err( KErrNotFound );

    for( TInt i = 0; i < mapCount && err; i++ )

        {

        CIMCVCommandInfo* info = iCommandIdMap[i];

        if( info->PluginId() == aPluginId && info->NewCommandId() == aNewCommand )

            {

            aOldCommand = info->OldCommandId();

            err = KErrNone;

            break;

            }

        }  

        return err;

    }

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

// CIMCVMenuExtensionManager::GetNewCommand

// from MComandMapper

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

//

TInt CIMCVMenuExtensionManager::GetNewCommand( TInt32 aPluginId, TInt aOldCommand,

                                    TInt& aNewCommand ) const

    {

    TInt mapCount = iCommandIdMap.Count();

    TInt err( KErrNotFound );

    for( TInt i = 0; i < mapCount && err; i++ )

        {

        CIMCVCommandInfo* info = iCommandIdMap[i];

        if( info->PluginId() == aPluginId && info->OldCommandId() == aOldCommand )

            {

            aNewCommand = info->NewCommandId();

            err = KErrNone;

            break;

            }

        }   

    return err; 

    }

// End of file