/*

* Copyright (c) 2006 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:   Roster.

*

*/

#include "alf/alfroster.h"

#include "alf/alfdisplay.h"

#include "alf/alfcontrolgroup.h"

#include "alf/alfcontrol.h"

#include "alf/alfenv.h"

#include "alfclient.h"

#include "alf/alfevent.h"

#include "alflogger.h"

#include "alfpanic.h"

#include <uiacceltk/HuiUtil.h>

// Private data

struct CAlfRoster::TPrivateData

    {

    CAlfDisplay* iDisplay;                      // Not owned.

    RPointerArray<CAlfControlGroup> iEntries;    // Not owned. Kept in order.

    CAlfControl* iInputFocus;                   // Not owned.

    RPointerArray<MAlfControlGroupOrderChangedObserver> iControlGroupOrderChangedObservers; // Not owned.

    };

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

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

// Constructor

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

//

CAlfRoster::CAlfRoster()

    {

    }

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

// ConstructL

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

//

void CAlfRoster::ConstructL(CAlfDisplay* aDisplay)

    {

    iData = new (ELeave) TPrivateData;

    iData->iDisplay = aDisplay;

    iData->iInputFocus = NULL;

    }

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

// Destructor

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

//

CAlfRoster::~CAlfRoster()

    {

    if ( iData )

        {

        iData->iEntries.Close();

        iData->iControlGroupOrderChangedObservers.Close();

        }

    delete iData;

    iData = NULL;

    }

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

// Shows given control group.

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

//

EXPORT_C void CAlfRoster::ShowL(CAlfControlGroup& aGroup, TInt aWhere )

    {

    // If the group is already shown on the display, just adjust its 

    // position according to the parameters.

    if(Find(aGroup) != KErrNotFound)

        {

        // It is already shown. Only adjust position.

        TInt newPos = aWhere;

        if(newPos == KAlfRosterShowAtTop)

            {

            newPos = Count() - 1;

            }

        else if(newPos == KAlfRosterShowAtBottom)

            {

            newPos = 0;

            }

        else

            {

            // for PC lint

            }

        // Move the control group to a new position in the roster.

        const TBool lWasMoved = Move(aGroup, newPos);

        // Move on the server side

        iData->iDisplay->Env().Client().RosterShow( 

              aGroup.Identifier(), 

                aWhere, 

                iData->iDisplay->ServerHandle() );                 

        //fix for bug  "ESMA-7L3H7F". Notification is moved from Move() to here.          

        // Notify control group order changed observers about changed control group order

         if(lWasMoved)

        	{

        	NotifyControlGroupOrderChangedObservers();		

        	}

        return;

        }

    if(aWhere == KAlfRosterShowAtTop)

        {

        // Put the group on top of the roster.

        AppendL(aGroup);

        }

    else if(aWhere == KAlfRosterShowAtBottom)

        {

        InsertL(aGroup, 0);

        }

    else

        {

        InsertL(aGroup, aWhere);

        }

    // The group will automatically accept input events once shown.

    aGroup.SetAcceptInput(ETrue);

    // Show all the controls of the group.

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

        {

        aGroup.Control(i).ShowL(*iData->iDisplay);

        }

    // Bind the control group to the correct display.

    aGroup.BindDisplay(iData->iDisplay);

    // Show on the server side

    TInt err = 

        iData->iDisplay->Env().Client().RosterShow( 

            aGroup.Identifier(), 

            aWhere, 

            iData->iDisplay->ServerHandle() );

    // hide on error

    if ( err != KErrNone )

        {

        // There is no window group ID if we are not running this from a 

        // Symbian application. Therefore the roster::show returns an error.

        // -> only concider this to be an error if the CCoeEnv is present.

        if ( err == KErrNotFound && !CCoeEnv::Static() )

            {

            __ALFLOGSTRING1( "CAlfRoster::ShowL ignore error %d (no CCoeEnv)", err )

            return;

            }

        // Hide all the controls of the group.

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

            {

            aGroup.Control(i).Hide(*iData->iDisplay);

            }

        // Unbind the control group from the display.

        aGroup.BindDisplay(NULL);

        __ALFLOGSTRING1( "CAlfRoster::ShowL leave error %d", err )

        User::Leave( err );

        }

    // Notify control group order changed observers about changed control group order

    NotifyControlGroupOrderChangedObservers();

    }

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

// Hides given control group

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

//

EXPORT_C void CAlfRoster::Hide(CAlfControlGroup& aGroup)

    {

    // Hide on the server side

    TInt err = 

        iData->iDisplay->Env().Client().RosterHide( 

            aGroup.Identifier(), 

            iData->iDisplay->ServerHandle() );

    if ( err != KErrNone )

        {

        __ALFLOGSTRING1( "CAlfRoster::Hide panic error %d", err )

        USER_INVARIANT();

        }

    // Hide all the controls of the group.

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

        {

        aGroup.Control(i).Hide(*iData->iDisplay);

        }

    // Unbind the control group from the display.

    aGroup.BindDisplay(NULL);

    // Investigate whether control group was shown

    TBool wasShown = (Find(aGroup) == KErrNotFound) ? EFalse : ETrue;

    Remove(&aGroup);

    // Notify control group order changed observers about changed control group order

    // if control group was shown before.

    if(wasShown)

        {

        NotifyControlGroupOrderChangedObservers();

        }    

    }

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

// Returns index of the given group

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

//

EXPORT_C TInt CAlfRoster::Find(const CAlfControlGroup& aGroup) const

    {

    return iData->iEntries.Find( &aGroup );

    }

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

// Removes group

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

//    

void CAlfRoster::Remove(CAlfControlGroup* aGroup)

    {

    if ( aGroup )

        {

        TInt index = Find(*aGroup);

        if(index != KErrNotFound)

            {

            iData->iEntries.Remove(index);

            }

        }

    }

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

// Number of control groups

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

//

EXPORT_C TInt CAlfRoster::Count() const

    {

    return iData->iEntries.Count();

    }

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

// Moves group.

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

// 

TBool CAlfRoster::Move(CAlfControlGroup& aGroup, TInt aPos)

    {

    TInt index = Find(aGroup);

    TInt k = 0;

    if(index != KErrNotFound && index != aPos)

        {

        CAlfControlGroup* moving = iData->iEntries[index];

        if(aPos > index)

            {

            for(k = index; k < aPos; ++k)

                {

                iData->iEntries[k] = iData->iEntries[k + 1];

                }

            }

        else 

            {

            for(k = index; k > aPos; --k)

                {

                iData->iEntries[k] = iData->iEntries[k - 1];

                }

            }

        iData->iEntries[aPos] = moving;

        return ETrue;

        }

    return EFalse;    

    }

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

// Appends new group

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

//

void CAlfRoster::AppendL(CAlfControlGroup& aGroup)

    {

    User::LeaveIfError(iData->iEntries.Append(&aGroup));

    }

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

// Inserts new group

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

//

void CAlfRoster::InsertL(CAlfControlGroup& aGroup, TInt aPos)

    {

    if(Find(aGroup) != KErrNotFound)

        {

        User::Leave(KErrAlreadyExists);

        }

    User::LeaveIfError(iData->iEntries.Insert(&aGroup, aPos));

    }    

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

// Handles received event

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

//

TBool CAlfRoster::HandleEventL(const TAlfEvent& aEvent)

    {

    TInt i = 0;

    TInt k = 0;

    if(iData->iDisplay)

        {

        iData->iDisplay->Env().ContinueRefresh();

        }

    if(aEvent.IsPointerEvent())

        {

        // The order pointer events are offered in depends on the visuals.

        for(i = iData->iEntries.Count() - 1; i >= 0; --i)

            {

            CAlfControlGroup& group = *iData->iEntries[i];

            if(!group.AcceptInput())

                {

                // The group will not be receiving input events.

                continue;

                }

            for(k = group.Count() - 1; k >= 0; --k)

                {

                CAlfControl& control = group.Control(k);

                if(control.HitTest(aEvent.PointerEvent().iPosition))

                    {

                    if(control.OfferEventL(aEvent))

                        {

                        // The event was consumed, now it can't be handled by

                        // anyone else.

                        return ETrue;

                        }

                    }

                }

            }

        }

    else 

        {

        // First offer to the input control.

        if(aEvent.IsKeyEvent() && iData->iInputFocus && iData->iInputFocus->AcceptInput())

            {

            // check if the focus control has a host

            CAlfControl* focusRoot = iData->iInputFocus;

            while ( focusRoot->Host() )

                {

                focusRoot = focusRoot->Host();

                }

            if(focusRoot->OfferEventL(aEvent))

                {

                return ETrue;

                }

            }

        // Iterate through the groups and controls in priority order.

        for(i = iData->iEntries.Count() - 1; i >= 0; --i)

            {

            CAlfControlGroup& group = *iData->iEntries[i];

            if(!group.AcceptInput())

                {

                // The group will not be receiving input events.

                continue;

                }

            for(k = 0 ; k < group.Count() ; k++ )

                {

                CAlfControl& control = group.Control(k);

                if(control.OfferEventL(aEvent))

                    {

                    // The event was consumed, now it can't be handled by

                    // anyone else.

                    return ETrue;

                    }

                }

            // Notify observer that group didn't handle event?

            }

        }

    return EFalse;

    }

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

// 

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

//

EXPORT_C CAlfControlGroup& CAlfRoster::ControlGroup(TInt aIndex) const

    {

    return *iData->iEntries[aIndex];

    }

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

// 

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

//  

EXPORT_C CAlfControl* CAlfRoster::FindControl(TInt aControlId) const

    {

    for(TInt i = 0; i < iData->iEntries.Count(); ++i)

        {

        CAlfControl* control = 

            iData->iEntries[i]->FindControl(aControlId);

        if(control)

            {

            return control;

            }

        }

    return NULL;

    }

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

// 

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

//    

EXPORT_C void CAlfRoster::SetFocus(CAlfControl& aControl)

    {

    TRAP_IGNORE(ShowL( *aControl.ControlGroup(), KAlfRosterShowAtTop))

    // Something needs to change if these are not the same

    if ( &aControl != iData->iInputFocus ) 

        {

        ChangeInputFocus( &aControl );

        }

    }    

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

// Clears the input focus so that no control has focus.

// No change is implied for the visibility of the control group

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

//

EXPORT_C void CAlfRoster::ClearFocus()

    { 

    // Only do something if not cleared already

    if ( iData->iInputFocus != NULL ) 

        {

        ChangeInputFocus(NULL);

        }

    }

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

// The main job of this routine is to change iData->iInputFocus, and perform the 

// necessary co-ordinated activities.  This should be the only place to change this

// member datum. 

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

//      

void CAlfRoster::ChangeInputFocus( CAlfControl* aControl )

    {

    // This method will always do something except when both old value and new are NULL

    // If they are non-null and identical, then focus will be removed and then re-applied.

    // That is, any optimizations need to be done by the caller.

    // The policy of whether focus is altered in the AlfControl is maintained uniformly by storing the cone focus 

    // state at the beginning of the routine

    // Current implementation is for one display/roster.  If multiple displays added then this will have to be reconsidered

    TBool displayIsInitiallyFocused = iData->iDisplay ? iData->iDisplay->IsFocused() : EFalse;

    // There can be a latent focus only if display is unfocused.

    TBool latentFocus = ((iData->iInputFocus != NULL) && (!iData->iInputFocus->Focus()));    

    __ASSERT_DEBUG((latentFocus ? !displayIsInitiallyFocused : ETrue), User::Panic(_L("UIAcceltkClient"), EAlfRosterPanicFocusAnomaly));

    CAlfControl* oldFocusedControl = iData->iInputFocus;

    // Remove focus from the currently focused control

    if ( iData->iInputFocus )

        {

        // Remove focus from the control

        // Only need to change actual focus if the roster is focused

        if ( displayIsInitiallyFocused )

            {

            // This control should be focused at the moment or then there is a latent focus that we are manipulating.

            __ASSERT_DEBUG( iData->iInputFocus->Focus(), User::Panic(_L("UIAcceltkClient"),EAlfRosterPanicFocusAnomaly ));

            CAlfDisplay* display = iData->iInputFocus->Display();

            if ( display )

                {

               // SetFocus should cause the control to perform any required changes its visuals.

                iData->iInputFocus->SetFocus( *display, EFalse);

                }

            }

        // Still change the iInputFocus even if actual focus has not been removed

        if ( !aControl )

            {

            iData->iInputFocus = NULL;

            }

        }

    if ( aControl )

        {

        // Check that the control switched to is in this Roster. Ignore it if not.

        CAlfControl* control = FindControl(aControl->Id());

        if( control == aControl )

            {

            iData->iInputFocus = aControl;

            // This control should not be focused at the moment

            __ASSERT_DEBUG( !(iData->iInputFocus->Focus()), User::Panic(_L("UIAcceltkClient"),EAlfRosterPanicFocusAnomaly ));

            // Only manipulate actual focus if the roster is focused

            if ( displayIsInitiallyFocused )

                {               

                CAlfDisplay* display2 =  iData->iInputFocus->Display();

                if ( display2 )

                    {