/*

* Copyright (c) 2005-2007 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:  Used for handling XUIKON events

*

*/

#include "aixuikoneventhandler.h"

#include "aifweventhandler.h"

#include "aiuieventhandler.h"

#include "aiapplicationeventhandler.h"

#include "aiconsts.h"

#include "xmluicontroller.h"

#include "aixmluiconstants.h"

#include "aixmluiutils.h"

#include "contentrenderer.h"

#include "xnnodeappif.h"

#include "xnuiengineappif.h"

#include "xnproperty.h"

#include "xndomnode.h"

#include "xntype.h"

#include "xndomlist.h"      // for cxndomlist

#include "xndomattribute.h" // for cxndomattribute

#include "xndompropertyvalue.h"

#include "xnnodeappif.h"

#include "appui.h"

#include "xndomproperty.h"

#include "xnplugindefs.h"

#include "aieventhandler.h"

const TInt KAiMaxNumberCharacters = 5;

namespace AiXmlUiController

    {

    class CAIXuikonEventHandler::CNullEventHandler :

            public CBase,

            public MAiFwEventHandler,

            public MAiUiEventHandler,

            public MAiApplicationEventHandler

        {

    private: // from MAiFwEventHandler        

        void AppEnvReadyL();

        void HandleUiReadyEventL( CAiUiController& aUiController );

        void HandleActivateUI();

        void HandlePluginEvent( const TDesC& aParam );

        TBool RefreshContent( const TDesC& aContentCid );

    private: // from MAiUiEventHandler                                 

        TBool HandleUiEvent( TAny* aEvent, const TDesC8& aParam );

    private: // from MAiApplicationEventHandler                        

        TBool HandleApplicationEvent( TInt aEvent, const TDesC8& aParam );

        };

    }

using namespace AiXmlUiController;

using namespace AiUiDef::xml::event;

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

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

// CAIXuikonEventHandler::CAIXuikonEventHandler()

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

//

CAIXuikonEventHandler::CAIXuikonEventHandler( CXmlUiController& aUiController,

                                             CContentRenderer& aRenderer )

    : iUiController(aUiController),

      iContentRenderer(aRenderer)

    {

    }

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

// CAIXuikonEventHandler::ConstructL()

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

//

void CAIXuikonEventHandler::ConstructL()

    {

    iStrParser = AiUtility::CreateStrParserL();

    iNullEventHandler = new ( ELeave ) CNullEventHandler;

    iFwEventHandler = iNullEventHandler;

    iUiEventHandler = iNullEventHandler;

    iApplicationEventHandler = iNullEventHandler;

    }

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

// CAIXuikonEventHandler::NewL()

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

//

CAIXuikonEventHandler* CAIXuikonEventHandler::NewL(

        CXmlUiController& aUiController,

        CContentRenderer& aRenderer )

    {

    CAIXuikonEventHandler* self =

        new ( ELeave ) CAIXuikonEventHandler( aUiController, aRenderer );

    CleanupStack::PushL( self );    

    self->ConstructL();    

    CleanupStack::Pop( self );    

    return self;

    }

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

// CAIXuikonEventHandler::~CAIXuikonEventHandler()

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

//

CAIXuikonEventHandler::~CAIXuikonEventHandler()

    {

    delete iNullEventHandler;

    delete iVolumeEvent;

    Release( iStrParser );

    }

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

// CAIXuikonEventHandler::SetFwEventHandler()

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

//

void CAIXuikonEventHandler::SetFwEventHandler( 

    MAiFwEventHandler* aFwEventHandler )

    {

    if ( aFwEventHandler )

        {

        iFwEventHandler = aFwEventHandler;

        }

    else

        {

        iFwEventHandler = iNullEventHandler;

        }

    }

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

// CAIXuikonEventHandler::SetUiEventHandler()

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

//

void CAIXuikonEventHandler::SetUiEventHandler( 

    MAiUiEventHandler* aUiEventHandler )

    {

    if ( aUiEventHandler )

        {

        iUiEventHandler = aUiEventHandler;

        }

    else

        {

        iUiEventHandler = iNullEventHandler;

        }

    }

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

// CAIXuikonEventHandler::SetApplicationEventHandler()

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

//

void CAIXuikonEventHandler::SetApplicationEventHandler(

    MAiApplicationEventHandler* aApplicationEventHandler )

    {

    if ( aApplicationEventHandler )

        {

        iApplicationEventHandler = aApplicationEventHandler;

        }

    else

        {

        iApplicationEventHandler = iNullEventHandler;

        }

    }

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

// CAIXuikonEventHandler::HandleXuikonEventL()

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

//

void CAIXuikonEventHandler::HandleXuikonEventL( CXnNodeAppIf& aOrigin,

    CXnNodeAppIf& /*aTrigger*/, CXnDomNode& aTriggerDefinition, 

    CXnDomNode& aEvent )                                                                                              

    {

    DispatchEventL( aEvent, aOrigin, aTriggerDefinition );

    }

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

// CAIXuikonEventHandler::HandleXuikonActionL()

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

//

inline TBool CAIXuikonEventHandler::HandleSystemEventL(  

    const TDesC8& aEventText, CXnDomNode& aEvent )

    {

    const TDesC8& prefix( AiUiDef::xml::event::KEventHandlerPrefix );   

    TInt pos( aEventText.Find( prefix ) );

    if ( pos != 0 )

        {

        // Event is not targeted here

        return EFalse;

        }

    CAIEventHandler* handler = CAIEventHandler::NewL( iUiController );

    CleanupStack::PushL( handler );

    handler->HandleEventL( aEventText, aEvent );

    CleanupStack::PopAndDestroy( handler );

    return ETrue;

    }

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

// CAIXuikonEventHandler::ParseParameterStringL()

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

//

void CAIXuikonEventHandler::ParseParameterStringL( const TDesC8& aSourcePtr,

    TPtrC8& aTargetPtr )

    {

    // Parses parameter string between the first '(' and last ')'

    // Trailing and heading white spaces ARE NOT handled!

    const TInt separatorPos = aSourcePtr.Locate( KEventParameterSeparator );

    User::LeaveIfError( separatorPos );

    const TInt eventSeparatorPos = aSourcePtr.LocateReverse(

                                                KEventParameterSeparatorEnd );

    User::LeaveIfError( eventSeparatorPos );

    // separatorPos + 1 must be smaller than eventSeparatorPos - 1

    User::LeaveIfError( ( eventSeparatorPos ) - ( separatorPos + 1 ) );

    // Extract event and parameter string

    TPtrC8 menuName( aSourcePtr.Mid( separatorPos + 1,

                    ( eventSeparatorPos ) - ( separatorPos + 1 ) ) );

    aTargetPtr.Set( menuName );

    }

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

// CAIXuikonEventHandler::HandleUiEventL()

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

//

inline TBool CAIXuikonEventHandler::HandleUiEventL( const TDesC8& aEventText, 

    CXnNodeAppIf& aOrigin )

    {    

    if ( aEventText.Left( KUiEventPrefix().Length() ) == KUiEventPrefix )

        {

        iUiEventHandler->HandleUiEvent( (TAny*)&aOrigin, aEventText );

        return ETrue;

        }

    return EFalse;

    }

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

// CAIXuikonEventHandler::HandleApplicationEventL()

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

//

inline TBool CAIXuikonEventHandler::HandleApplicationEventL(

    const TDesC8& aEventText )

    {

    return iApplicationEventHandler->HandleApplicationEvent( 0, aEventText );

    }

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

// CAIXuikonEventHandler::VolumeChanged()

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

//

void CAIXuikonEventHandler::VolumeChanged( TInt aValue )

    {

    TRAP_IGNORE(

        // Ignore errors, missing one event is not fatal enough to panic

        HBufC* volumeString( HBufC::NewLC( KAiMaxNumberCharacters ) );

        volumeString->Des().Num( aValue );

        HBufC* eventString( iVolumeEvent->AllocLC() );

        TInt foundAt( eventString->Des().Find( KTargetSliderVolumeValue ) );

        if( foundAt >= 0 )

            {

            eventString->Des().Replace( foundAt, 

                    KTargetSliderVolumeValue().Length(), *volumeString );

            }

        // TODO: implement namespace properly

        iFwEventHandler->HandlePluginEvent( *eventString );

        CleanupStack::PopAndDestroy( 2, volumeString );

        ); // TRAP_IGNORE

    }

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

// CAIXuikonEventHandler::HandlePluginEventL()

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

//

inline

void CAIXuikonEventHandler::HandlePluginEventL( CXnDomNode& aEvent )                                          

    {       

    const TDesC8& event8( 

        aEvent.AttributeValue( XnPropertyNames::action::event::KName ) );    

    HBufC16* event( NULL );

    event = iStrParser->CopyToBufferL( event, event8 );

    if ( !event || *event == KNullDesC )

        {

        // No event defined

        return;

        }

    CleanupStack::PushL( event );

    TXnUiEngineAppIf* engine( iUiController.UiEngineL() );

    const TDesC8& broadcast( 

        aEvent.AttributeValue( XnPropertyNames::action::event::KBroadcast ) );

    if ( broadcast == XnPropertyNames::KTrue )

        {

        // Broadcast events are allowed only from view's namespace

        if ( engine->ActiveView()->Namespace() == aEvent.Namespace() )

            {

            _LIT8( KGlobal, "global" );

            // Get all plugins

            RPointerArray< CXnNodeAppIf > 

                list( engine->FindContentSourceNodesL( KGlobal ) );

            CleanupClosePushL( list );

            // Broadcast event to all plugins

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

                {

                iUiController.PublisherInfoL( *list[i], info );

                // Forward event to AiFw

                iFwEventHandler->HandlePluginEventL( info, *event );                

                }

            CleanupStack::PopAndDestroy( &list );                

            }                

        }

    else

        {

        const TDesC8& ns( aEvent.Namespace() );

        // Get plugins from the event's namespace

        RPointerArray< CXnNodeAppIf > 

            list( engine->FindContentSourceNodesL( ns ) );

        CleanupClosePushL( list );

        if ( list.Count() == 1 )

            {

            // Only one data plugin in this namespace,

            // it must handle this event.

            iUiController.PublisherInfoL( *list[0], info );

            // Forward event to AiFw

            iFwEventHandler->HandlePluginEventL( info, *event );

            }

        else if ( list.Count() > 1 )

            {

            const TDesC8& destination( 

                aEvent.AttributeValue( 

                        XnPropertyNames::action::event::KDestination ) );

            // Multiple data plugins in this namespace,

            // resolve destination

            CXnNodeAppIf* eventHandler( 

                engine->FindNodeByIdL( destination, ns ) );

            if ( eventHandler )

                {            

                iUiController.PublisherInfoL( *eventHandler, info );

                // Forward event to AiFw

                iFwEventHandler->HandlePluginEventL( info, *event );            

                }

            else

                {

                // No exact destination defined,  

                // try to find a correct plugin based on event

                const TInt pos( event->Locate( KPluginEventSeparator ) );

                if ( pos != KErrNotFound )

                    {

                    // Extract plugin name

                    TPtrC pluginName( event->Left( pos ) );

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

                        {

                        iUiController.PublisherInfoL( *list[i], info );

                            {

                            // Forward Plug-in events to AI FW for further 

                            // dispatching to the target Plug-in

                            iFwEventHandler->HandlePluginEventL( info,*event );                                                             

                            break;

                            }

                        }

                    }                

                }

            }                        

        CleanupStack::PopAndDestroy( &list );    

        }        

    CleanupStack::PopAndDestroy( event ); 

    }

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

// CAIXuikonEventHandler::DispatchEventL()

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

//

void CAIXuikonEventHandler::DispatchEventL( CXnDomNode& aEvent,

    CXnNodeAppIf& aOrigin, CXnDomNode& /*aTriggerDefinition*/ )                                            

    {

    const TDesC8& aEventString8( 

        aEvent.AttributeValue( XnPropertyNames::action::event::KName ) );

    // First check if the event is a XUIKON-specific event

    if( !HandleSystemEventL( aEventString8, aEvent ) )

        {

        // Next check if it is a UI event

        if( !HandleUiEventL( aEventString8, aOrigin ) )

            {

            // Next check if it is an application event

            if( !HandleApplicationEventL( aEventString8 ) )

                {                

                // Assume that it is a Plug-in event

                HandlePluginEventL( aEvent );

                }

            }

        }

    }

// CAIXuikonEventHandler::CNullEventHandler

void CAIXuikonEventHandler::CNullEventHandler::AppEnvReadyL()

    {

    }

    {

    }

void CAIXuikonEventHandler::CNullEventHandler::HandleActivateUI()

    {   

    }

    {

    }

    {

    }

TBool CAIXuikonEventHandler::CNullEventHandler::HasMenuItemL( 

    {

    return EFalse;

    }

    {

    }

TBool CAIXuikonEventHandler::CNullEventHandler::RefreshContent( 

    const TDesC& /*aContentCid*/ )

    {

    return EFalse;

    }

    {