/*

* Copyright (c) 2002-2004 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:  Event dispatcher

*

*/

// System includes

#include <AknUtils.h>

// User includes

#include "xnappuiadapter.h"

#include "xnfocuscontrol.h"

#include "xnkeyeventdispatcher.h"

#include "xntype.h"

#include "xncomponentnodeimpl.h"

#include "xnproperty.h"

#include "xnuiengine.h"

#include "xnodt.h"

#include "xndomdocument.h"

#include "xndomnode.h"

#include "xnmenuadapter.h"

#include "xneditmode.h"

#include "xnviewmanager.h"

#include "xnviewdata.h"

#include "xnnode.h"

// Local macros

#define IS_ARROW_KEY( k ) \

    ( k == EStdKeyLeftArrow || k == EStdKeyRightArrow || \

      k == EStdKeyUpArrow || k == EStdKeyDownArrow ) 

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

// SetInitialFocusL

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

//

static void SetInitialFocusL( RPointerArray< CXnNode >& aArray )

    {

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

        {

        CXnNode* node( aArray[i] );

        node->SetStateWithoutNotificationL(

            XnPropertyNames::style::common::KFocus );

        if ( node->IsStateSet( XnPropertyNames::style::common::KFocus ) )

            {

            break;

            }

        }

    }

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

// BuildTriggerNodeL

// Builds a trigger node

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

//

static CXnNode* BuildTriggerNodeL(

    CXnUiEngine& aUiEngine,

    const TDesC8& aTriggerName )

    {

    CXnNode* node = CXnNode::NewL();

    CleanupStack::PushL( node );

    CXnType* type = CXnType::NewL( XnPropertyNames::action::KTrigger );

    CleanupStack::PushL( type );

    CXnNodeImpl* impl = CXnNodeImpl::NewL( type );

    CleanupStack::Pop( type );

    node->SetImpl( impl );

    node->SetUiEngine( aUiEngine );

    CXnDomPropertyValue* nameValue =

        CXnDomPropertyValue::NewL( aUiEngine.ODT()->DomDocument().StringPool() );

    CleanupStack::PushL( nameValue );

    nameValue->SetStringValueL( CXnDomPropertyValue::EString, aTriggerName );

    CXnProperty* name =

        CXnProperty::NewL( XnPropertyNames::action::trigger::KName, nameValue,

                           *aUiEngine.ODT()->DomDocument().StringPool() );

    CleanupStack::Pop( nameValue );

    CleanupStack::PushL( name );

    node->SetPropertyL( name );

    CleanupStack::Pop( name );

    CleanupStack::Pop( node );

    return node;

    }

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

// MenuAdapter

// Gets menuadapter from node, NULL if not available

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

//

static CXnMenuAdapter* MenuAdapter( CXnNode* aNode )

    {

    if ( aNode )

        {        

        return static_cast< CXnMenuAdapter* >( aNode->Control() );

        }

    return NULL;

    }

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

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

// CXnKeyEventDispatcher::NewL

// Two-phased constructor. Can leave.

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

//

CXnKeyEventDispatcher* CXnKeyEventDispatcher::NewL( CXnUiEngine& aUiEngine )

    {

    CXnKeyEventDispatcher* self = new ( ELeave ) CXnKeyEventDispatcher( aUiEngine );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop();

    return self;

    }

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

// CXnKeyEventDispatcher::~CXnKeyEventDispatcher

// Destructor.

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

//

CXnKeyEventDispatcher::~CXnKeyEventDispatcher()

    {

    iCoeEnv->RemoveMessageMonitorObserver( *this );

    iUiEngine.ViewManager()->RemoveObserver( *this );

    delete iLoseFocus;

    delete iGainFocus;

    iPassiveFocusedNodes.Reset();

    }

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

// CXnKeyEventDispatcher::CXnKeyEventDispatcher

// C++ default constructor. Must not leave.

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

//

CXnKeyEventDispatcher::CXnKeyEventDispatcher( CXnUiEngine& aUiEngine )

    : iUiEngine( aUiEngine )

    {

    }

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

// CXnKeyEventDispatcher::ConstructL

// 2nd phase constructor. Can leave.

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

//

void CXnKeyEventDispatcher::ConstructL()

    {

    MakeVisible( EFalse );

    iUiEngine.ViewManager()->AddObserver( *this );

    iCoeEnv->AddMessageMonitorObserverL( *this );    

    }

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

// CXnKeyEventDispatcher::MonitorWsMessage

// 

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

//

void CXnKeyEventDispatcher::MonitorWsMessage( const TWsEvent& aEvent )

    {

    TInt type( aEvent.Type() );

    if ( type == EEventPointer && AknLayoutUtils::PenEnabled() )

        {    

        const TUint handle( aEvent.Handle() );

        CCoeControl* destination = reinterpret_cast< CCoeControl* >( handle );        

        TPointerEvent& event( *aEvent.Pointer() );

        if ( iCbaContainer )

            {

            CEikCba* cba = 

                static_cast< CEikCba* >( iCbaContainer->ButtonGroup() ); 

            if ( destination == cba && iCbaContainer->IsVisible() )

                {

                CXnMenuAdapter* adapter( MenuAdapter( iMenuNode ) );

                if ( adapter )

                    {

                    TRAP_IGNORE( 

                        adapter->HandlePointerEventL( *aEvent.Pointer() ) );

                    }

                }

            }

        }

    }

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

// CXnKeyEventDispatcher::OfferKeyEventL

// Handles key events.

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

//

TKeyResponse CXnKeyEventDispatcher::OfferKeyEventL(

    const TKeyEvent& aKeyEvent,

    TEventCode aType )

    {

    TKeyResponse resp( EKeyWasNotConsumed );

    iEventCode = aType;

    CXnNode* node( NULL );

    TBool keyYesNoApps( EFalse );

    if ( iUiEngine.IsMenuDisplaying() ||

         aKeyEvent.iScanCode == EStdKeyDevice0 ||

         aKeyEvent.iScanCode == EStdKeyDevice1 )

        {

        iFocusChanged = EFalse;

        // When menu is focused or LSK/RSK is pressed,

        // then forward events to menuadapter.

        // Note that MSK is handled directly in the base class as it used only

        // for activating

        node = iMenuNode;

        }

    else if ( aKeyEvent.iScanCode == EStdKeyApplication0 ||

              aKeyEvent.iScanCode == EStdKeyYes ||

              aKeyEvent.iScanCode == EStdKeyNo )

        {

        keyYesNoApps = ETrue;

        iFocusChanged = EFalse;

        // AppsKey, YesKey, NoKey events must be always handled, and if we don't

        // have a focused node, then let the view node do the job

        node = ( !iNode ) ? iUiEngine.ActiveView() : iNode;

        }

    else

        {

        CXnAppUiAdapter& appui( iUiEngine.AppUiAdapter() );

        if ( IS_ARROW_KEY( aKeyEvent.iScanCode ) && aType == EEventKey )

            {

            if ( !appui.FocusShown() )

                {

                appui.ShowFocus();

                if ( !iNode )

                    {

                    // Find initial location for focus

                    ResolveAndSetFocusL(); 

                    return EKeyWasConsumed;

                    }

                }

            }

        CCoeControl* editmode( iUiEngine.EditMode() );

        if ( editmode->OfferKeyEventL( aKeyEvent, aType ) == EKeyWasConsumed )

            {

            return EKeyWasConsumed;

            }

        // Offer keyevent to the focused node        

        node = iNode;

        if ( aType == EEventKeyDown )

            {

            // Reset state

            iFocusChanged = EFalse;

            iKeyEventNode = iNode;

            }

        if ( iFocusChanged && ( aType == EEventKeyUp ) )

            {

            // Pass keyup event to

            // previously focused node

            node = iKeyEventNode;

            }

        }

    if ( !keyYesNoApps )

        {

        if ( iEventCode == EEventNull && aType != EEventKeyDown )

            {    

            // We are waiting for down event

            return resp;

            }        

        }

    if ( !node )

        {

        return resp;

        }

    iUiEngine.DisableRenderUiLC();

    CXnControlAdapter* adapter( node->Control() );

    if( adapter && adapter->IsVisible() )                            

        {

        resp = adapter->OfferKeyEventL( aKeyEvent, aType );

        }

    if ( aType != EEventKeyUp && iKeyEventNode != iNode )

        {

        // Focused node is changed during keyevent

        iFocusChanged = ETrue;

        }

    if ( aType == EEventKeyUp )

        {

        iEventCode = EEventNull;

        }

    iUiEngine.RenderUIL();

    CleanupStack::PopAndDestroy(); // DisableRenderUiLC

    return resp;

    }

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

// CXnKeyEventDispatcher::SetNode

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

//

void CXnKeyEventDispatcher::SetNodeL( CXnNode* aNode, TInt aSource )

    {

    if ( iNode == aNode )

        {

        return;

        }

    iPreviousNode = iNode;

    iNode = aNode;

    SetNodeL( iPreviousNode, iNode, ETrue, aSource );

    }

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

// CXnKeyEventDispatcher::SetNodeWithoutNotificationL

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

//

void CXnKeyEventDispatcher::SetNodeWithoutNotificationL( CXnNode* aNode )

    {

    if ( iNode == aNode )

        {

        return;

        }

    iPreviousNode = iNode;

    iNode = aNode;

    SetNodeL( iPreviousNode, iNode, EFalse );

    }

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

// SetNodeL

// Changes focused node, runs gain focus/lose focus triggers if needed

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

//

void CXnKeyEventDispatcher::SetNodeL( CXnNode* aToLose, CXnNode* aToGain,

    TBool aNotify, TInt aSource )

    {

    if ( aToLose )

        {

        aToLose->SetDirtyL( XnDirtyLevel::ERender );

        aToLose->UnsetStateL( XnPropertyNames::style::common::KFocus );

        aToLose->UnsetStateL( XnPropertyNames::style::common::KHold );

        aToLose->UnsetStateL( XnPropertyNames::style::common::KActive );

        if ( aNotify )

            {

            if ( !iLoseFocus )

                {

                iLoseFocus = BuildTriggerNodeL( iUiEngine,

                    XnPropertyNames::action::trigger::name::KLoseFocus );

                }

            aToLose->ReportXuikonEventL( *iLoseFocus );

            }

        CXnControlAdapter* adapter( aToLose->Control() );

        if ( adapter )

            {

            adapter->SetFocus( EFalse );

            }

        }

    if ( aToGain )

        {

        aToGain->SetDirtyL( XnDirtyLevel::ERender );

        if ( aNotify )

            {

            if ( !iGainFocus )

                {

                iGainFocus = BuildTriggerNodeL( iUiEngine,

                        XnPropertyNames::action::trigger::name::KGainFocus );

                }

            aToGain->ReportXuikonEventL( *iGainFocus, aSource );

            }

        CXnControlAdapter* adapter( aToGain->Control() );

        if ( adapter )

            {

            adapter->SetFocus( ETrue );

            }

        }

    }

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

// CXnKeyEventDispatcher::FocusedNode

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

//

CXnNode* CXnKeyEventDispatcher::FocusedNode() const

    {

    if ( iNode && iNode->IsStateSet( XnPropertyNames::style::common::KFocus ) )

        {

        return iNode;

        }

    return NULL;

    }

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

// CXnKeyEventDispatcher::RefreshMenu

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

//

void CXnKeyEventDispatcher::RefreshMenuL()

    {

    CXnMenuAdapter* menuAdapter( MenuAdapter( iMenuNode ) );

    if ( menuAdapter )

        {

        menuAdapter->SetContainerL( *iCbaContainer );

        }

    }

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

// CXnKeyEventDispatcher::SetMenuNode

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

//

void CXnKeyEventDispatcher::SetMenuNodeL( CXnNode* aNode )

    {

    CXnMenuAdapter* menuAdapter( MenuAdapter( aNode ) );

    iCbaContainer = iAvkonAppUi->Cba();

    if ( menuAdapter )

        {

        iMenuNode = aNode;

        menuAdapter->SetContainerL( *iCbaContainer );

        CXnProperty* prop( iMenuNode->DisplayL() );

        if ( prop && prop->StringValue() == 

            XnPropertyNames::style::common::display::KNone )

            {

            iCbaContainer->MakeVisible( EFalse );

            }

        else

            {

            }

        }

    else

        {

        iCbaContainer->MakeVisible( EFalse );

        // The node passed in wasn't a valid menu node

        ResetMenuNodeL();

        }

    }

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

// CXnKeyEventDispatcher::ResetMenuNodeL

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

//

void CXnKeyEventDispatcher::ResetMenuNodeL()

    {

    iMenuNode = NULL;

    iCbaContainer = NULL;

    }

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

// CXnKeyEventDispatcher::IsMenuFocused

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

//

TBool CXnKeyEventDispatcher::IsMenuFocused() const

    {