/*

* 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:

*

*/

// System includes

#include <e32base.h>

#include <e32const.h>

#include <coecntrl.h>

#include <coemain.h>

#include <AknUtils.h>

#include <gfxtranseffect/gfxtranseffect.h>

#include <akntransitionutils.h>

#include <AknPriv.hrh>

// User includes

#include "xnwidgetextensionadapter.h"

#include "xncontroladapter.h"

#include "xncomponentnodeimpl.h"

#include "xncomponent.h"

#include "xnuiengine.h"

#include "xnnode.h"

#include "xnnodepluginif.h"

#include "xnviewnodeimpl.h"

#include "xnnodepluginif.h"

#include "xndomdocument.h"

#include "xnproperty.h"

#include "xnodt.h"  

#include "xntype.h"

#include "xndomnode.h"

#include "xndomstringpool.h"

#include "xnappuiadapter.h"

#include "xnviewmanager.h"

#include "xnviewdata.h"

#include "xnplugindata.h"

// Constants

_LIT8( KPopup, "popup" );

_LIT8( KPositionHint, "_s60-position-hint" );

_LIT8( KWidgetNodeName, "widget" );

_LIT8( KParentIdName, "parentid" );

_LIT8( KDisplay, "display" );

_LIT8( KNone, "none" );

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

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

// CXnWidgetExtensionAdapter::NewL

// Two-phased constructor. Can leave.

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

//

CXnWidgetExtensionAdapter* CXnWidgetExtensionAdapter::NewL( 

    CXnNodePluginIf& aNode )

    {

    CXnWidgetExtensionAdapter* self = 

        new ( ELeave ) CXnWidgetExtensionAdapter( aNode );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// CXnWidgetExtensionAdapter::~CXnWidgetExtensionAdapter

// Destructor.

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

//

CXnWidgetExtensionAdapter::~CXnWidgetExtensionAdapter()

    {

    if ( iAppUiAdapter )

        {

        iAppUiAdapter->UiStateListener().RemoveObserver(

                *( static_cast< MXnUiStateObserver* >( this ) ) );

        iAppUiAdapter->UiStateListener().RemoveObserver(

                        *( static_cast< MXnUiResourceChangeObserver* >( this ) ) );

        }

    GfxTransEffect::Deregister( this );

    }

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

// CXnWidgetExtensionAdapter::HandleScreenDeviceChangedL

// 

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

// 

void CXnWidgetExtensionAdapter::HandleScreenDeviceChangedL()

	{

    if( IsVisible() )

		{

	    CCoeControl::MakeVisible( EFalse );

		}

	CXnControlAdapter::HandleScreenDeviceChangedL();

	}

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

// CXnWidgetExtensionAdapter::CXnWidgetExtensionAdapter

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

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

//

CXnWidgetExtensionAdapter::CXnWidgetExtensionAdapter( CXnNodePluginIf& aNode )

    : iNode( aNode ), iPositionHint( ENone )

    {

    }

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

// CXnWidgetExtensionAdapter::ConstructL

// 2nd phase constructor. Can leave.

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

//    

void CXnWidgetExtensionAdapter::ConstructL()

    {

    iAppUiAdapter = static_cast< CXnAppUiAdapter* >( iAvkonAppUi );

    CreateWindowL();

    Window().SetRequiredDisplayMode( EColor16MA );

    // this adapter handles both widgetextension and popup nodes

    // we have to decide which one of them is the recent one    

    CXnType* typeInfo = iNode.Node().Type();

    User::LeaveIfNull( typeInfo );

    const TDesC8& type = typeInfo->Type();

    iPermanent = EFalse;

    if ( type == KPopup )          

        {

        iPopup = ETrue;

        CXnProperty* prop( iNode.Node().GetPropertyL( 

            XnPropertyNames::popup::KPopupType ) );

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

            XnPropertyNames::popup::popuptype::KPermanent )

            {

            iPermanent = ETrue;

            }        

        }

    else

        {

        if ( Window().SetTransparencyAlphaChannel() == KErrNone )

            {

            Window().SetBackgroundColor( ~0 );

            }                     

        }

    iUiEngine = iNode.Node().UiEngine();

    CXnControlAdapter::ConstructL( iNode );

    EnableDragEvents();

    GfxTransEffect::Register( this, KGfxPreviewPopupControlUid );

    }

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

// CXnWidgetExtensionAdapter::MakeVisible

// 

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

// 

void CXnWidgetExtensionAdapter::MakeVisible( TBool aVisible )

    {

    if ( IsVisible() == aVisible )

        {

        return;

        }

    CXnPluginData* plugin( 

            iAppUiAdapter->ViewManager().ActiveViewData().Plugin( &iNode.Node() ) );

    if ( !plugin )

        {

        return;

        }

    SetPointerCapture( aVisible );

    plugin->SetIsDisplayingPopup( aVisible, &iNode.Node() );

    if ( !iPopup )

        {

        DrawableWindow()->FadeBehind( aVisible );

        }

    if ( !iPermanent )

        {

        if ( aVisible )

            {

            iAppUiAdapter->UiStateListener().AddObserver(

                    *( static_cast< MXnUiStateObserver* >( this ) ) );

            iAppUiAdapter->UiStateListener().AddObserver(

                            *( static_cast< MXnUiResourceChangeObserver* >( this ) ) );

            }

        else

            {

            iAppUiAdapter->UiStateListener().RemoveObserver(

                    *( static_cast< MXnUiStateObserver* >( this ) ) );

            iAppUiAdapter->UiStateListener().RemoveObserver(

                            *( static_cast< MXnUiResourceChangeObserver* >( this ) ) );

            }

        }

    if ( aVisible && iPopup )

        {        

        ChangePopupPosition();

        }

    TBool effectStarted = EFalse;

    if ( iAppUiAdapter->IsForeground() )

        {

        if ( aVisible )

            {

            GfxTransEffect::Begin( this, KGfxControlAppearAction );

            }

        else

            {

            GfxTransEffect::Begin( this, KGfxControlDisappearAction );

            }

        effectStarted = ETrue;

        }

    CCoeControl::MakeVisible( aVisible );

    if ( effectStarted )

        {

        GfxTransEffect::SetDemarcation( this, iPosition );

        GfxTransEffect::End( this );

        }

    }

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

// CXnWidgetExtensionAdapter::HandlePointerEventL

// 

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

//    

void CXnWidgetExtensionAdapter::HandlePointerEventL( 

    const TPointerEvent& aPointerEvent )

    {

    // in case of popup, we have to make sure that 

    // it will be closed after tapping outside of the

    // area of itself and its parent

    if ( iPopup )

        {        

        // check if the tap was inside of popup

        TRect popupRect = this->Rect();

        popupRect.Move(this->Position() );

        TBool isInPopupWindow = popupRect.Contains(

                aPointerEvent.iParentPosition );

        if ( !isInPopupWindow )

            {            

            // if tap was outside of window, check if tap was 

            // inside of the parrent

            CXnProperty* parentIdProp( iNode.Node().GetPropertyL(

                    KParentIdName ) );

            if ( parentIdProp )

                {                

                const TDesC8& parentIdVal = parentIdProp->StringValue();

                CXnNode* parentN(iUiEngine->FindNodeByIdL( parentIdVal,

                        iNode.Node().Namespace() ) );

                if ( parentN )

                    {

                    TRect clientRect =

                            static_cast<CEikAppUi&> ( *iAppUiAdapter ).ClientRect();

                    TRect parentRect = parentN->Rect();

                    parentRect.Move( clientRect.iTl );

                    if ( !parentRect.Contains( aPointerEvent.iParentPosition ) )

                        {

                        // tap was neither in popup nor in its parent -

                        // we can close it

                        if ( aPointerEvent.iType == TPointerEvent::EButton1Down )

                            {

                            HidePopupL();

                            return;

                            }

                        }

                    else

                        {

                        // tap was made inside of popup parent

                        // we pass the event to it after

                        // recalculating the taping point

                        TPointerEvent newPointerEvent;

                        newPointerEvent.Copy( aPointerEvent );

                        newPointerEvent.iPosition = TPoint(

                                 aPointerEvent.iParentPosition - clientRect.iTl );

                        parentN->Control()->HandlePointerEventL( newPointerEvent );

                        return;

                        }

                    }

                }

            else

                {

                HidePopupL();

                }

            }

        }

    CXnControlAdapter::HandlePointerEventL( aPointerEvent );    

    }

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

// CXnWidgetExtensionAdapter::Draw

// 

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

//    

void CXnWidgetExtensionAdapter::Draw( const TRect& aRect ) const

    {

    SystemGc().Clear( aRect );

    CXnControlAdapter::Draw( aRect );

    }

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

// CXnWidgetExtensionAdapter::DoHandlePropertyChangeL

// 

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

//    

void CXnWidgetExtensionAdapter::DoHandlePropertyChangeL( CXnProperty* /*aProperty*/ )

    {

    if( iNode.Node().IsLaidOut() && IsVisible() )

        {

        ChangePopupPosition();

        }

    }

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

// CXnWidgetExtensionAdapter::ChangePopupPosition

// 

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

// 

void CXnWidgetExtensionAdapter::ChangePopupPosition()

    {

    if ( iPopup )

        { 

        // read position-hint property and set-up its variable

        CXnProperty* positionHintProp = NULL;

        TRAP_IGNORE( positionHintProp = iNode.Node().GetPropertyL( KPositionHint ) );

        if ( positionHintProp )

            {

            const TDesC8& displayHintVal = positionHintProp->StringValue();

            if ( displayHintVal == XnPropertyNames::tooltip::positionhint::KAboveLeft )

                {

                iPositionHint = EAboveLeft;

                }

            else if ( displayHintVal == XnPropertyNames::tooltip::positionhint::KAboveRight )

                {

                iPositionHint = EAboveRight;

                }

            else if ( displayHintVal == XnPropertyNames::tooltip::positionhint::KBelowLeft )

                {

                iPositionHint = EBelowLeft;

                }

            else if ( displayHintVal == XnPropertyNames::tooltip::positionhint::KBelowRight )

                {

                iPositionHint = EBelowRight;

                }

            else if ( displayHintVal == XnPropertyNames::tooltip::positionhint::KRight )

                {

                iPositionHint = ERight;

                }

            else if ( displayHintVal == XnPropertyNames::tooltip::positionhint::KLeft )

                {

                iPositionHint = ELeft;

                }

            else 

                {

                 // if the value if of unknown type, use default one

                 if ( AknLayoutUtils::LayoutMirrored() )

                     {

                     iPositionHint = EAboveRight;

                     }

                     else

                     {

                     iPositionHint = EAboveLeft; 

                     }

                 }

            if ( iPositionHint != ENone )

                {    

                // the popup is going visible and position-hind is available

                // calculate its position

                CalculatePosition();

                }

            }        

        }

    }

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

// CalculatePosition

// This is used only for popup element with position hint

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

void CXnWidgetExtensionAdapter::CalculatePosition() 

    {

    // widget's rectangle

    TRect controlRect;

    // get popup's size.

    TSize popupSize = iNode.BorderRect().Size();

    TRect clientRect = static_cast<CEikAppUi&>( *iAppUiAdapter ).ClientRect();

    // get entire screen except control pane

    TRect contentRect( 0, 0, clientRect.iBr.iX, clientRect.iBr.iY ); 

    // resulting rectangle

    TRect rect;

    TPoint offset( clientRect.iTl );

    // parent widget's rectangle ( first predecesscor which is "widget" )

    CXnNode* parent = iNode.Node().Parent();

    while ( parent )

        {

        const TDesC8& type( parent->DomNode()->Name() );

        if ( type == KWidgetNodeName )

            {

            break;

            }

        parent = parent->Parent();

        }

    // if predecesscor widget was not found, use parent's rectangle

    if ( parent == NULL )

        { 

        controlRect = iNode.Node().Parent()->Rect();

        }

    else

        {

        controlRect = parent->BorderRect();

        }

    // calculate available space for placing the popup

    TInt spaceAbove = controlRect.iTl.iY + offset.iY;

    TInt spaceBelow = contentRect.iBr.iY - controlRect.iBr.iY - offset.iY;

    TInt spaceLeft = controlRect.iTl.iX + offset.iX;

    TInt spaceRight = contentRect.iBr.iX - controlRect.iBr.iX - offset.iX;

    switch ( iPositionHint )

        {

        case EAboveLeft:

            // if this position does not fit the screen,

            // and if below left is more suitable, use it

            if ( spaceAbove < popupSize.iHeight && spaceBelow > spaceAbove )

                {

                rect = TRect( TPoint( controlRect.iTl.iX, controlRect.iBr.iY ), 

                              TPoint( controlRect.iTl.iX + popupSize.iWidth, controlRect.iBr.iY + popupSize.iHeight ) );

                }

            else

                {

                // use the above-left position

                rect = TRect( TPoint( controlRect.iTl.iX, controlRect.iTl.iY - popupSize.iHeight ), 

                              TPoint( controlRect.iTl.iX + popupSize.iWidth, controlRect.iTl.iY ) );

                }

            break;

        case EAboveRight:

            // if this position does not fit the screen,

            // and if below right is more suitable, use it

            if ( spaceAbove < popupSize.iHeight && spaceBelow > spaceAbove )

                {

                rect = TRect( TPoint( controlRect.iBr.iX - popupSize.iWidth, controlRect.iBr.iY ), 

                              TPoint( controlRect.iBr.iX, controlRect.iBr.iY + popupSize.iHeight ) );

                }

            else

                {

                // use the above-right position

                rect = TRect( TPoint( controlRect.iBr.iX - popupSize.iWidth, controlRect.iTl.iY - popupSize.iHeight ), 

                              TPoint( controlRect.iBr.iX,  controlRect.iTl.iY ) );

                }

            break;

        case EBelowLeft:

            // if this position does not fit the screen,

            // and if above left is more suitable, use it

            if ( spaceBelow < popupSize.iHeight && spaceBelow < spaceAbove )

                {

                rect = TRect( TPoint( controlRect.iTl.iX, controlRect.iTl.iY - popupSize.iHeight ), 

                              TPoint( controlRect.iTl.iX + popupSize.iWidth, controlRect.iTl.iY ) );

                }

            else

                {

                // use the below-left position

                rect = TRect( TPoint( controlRect.iTl.iX, controlRect.iBr.iY ), 

                              TPoint( controlRect.iTl.iX + popupSize.iWidth, controlRect.iBr.iY + popupSize.iHeight ) );