/*

* Copyright (c) 2002-2005 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:            Implementation of Pinyin phrase predictive Qwerty state

*

*/

// System includes

#include <PtiEngine.h>                      //CPtiEngine

// User includes

#include "AknFepUiInputStateCandidateChinese.h"

#include "AknFepUiCtrlContainerChinese.h"

#include "AknFepUIManagerStateInterface.h"  //MAknFepUIManagerStateInterface

#include "AknFepUICtrlCandidatePane.h"      //MAknFepUICtrlCandidatePane

#include "AknFepManagerUIInterface.h"       //MAknFepManagerUIInterface

#include "AknFepManager.h"

const TInt KMaxCandidateCountFromCore = 6;

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

// TAknFepInputStateCandidateChinese::

// TAknFepInputStateCandidateChinese

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

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

//

TAknFepInputStateCandidateChinese::TAknFepInputStateCandidateChinese(

                               MAknFepUIManagerStateInterface* aOwner,

                               MAknFepUICtrlContainerChinese* aUIContainer)

    :TAknFepInputStateCandidateBase(aOwner, aUIContainer)

    {

    iState = ECandidate;

    MAknFepUICtrlContainerChinese* uiContainer = UIContainer();

    uiContainer->CandidatePane()->SelectFirst();

    TBool multiplePages = iOwner->PtiEngine()->MoreCandidatePages();

    TInt bufLength = iOwner->PtiEngine()->CandidatePage().Length();

    TBool showHorizontalScrollArrows = multiplePages || bufLength>1;

    uiContainer->ShowHorizontalScrollArrows(showHorizontalScrollArrows); 

    uiContainer->ShowVerticalScrollArrows(multiplePages);

    uiContainer->FocusCandidatePane(ETrue);

    uiContainer->CandidatePane()->ShowCandidateOrdinals(ETrue);

    UpdateIndicator();

    }

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

// TAknFepInputStateCandidateChinese::

// HandleKeyL

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

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

//

TBool TAknFepInputStateCandidateChinese::HandleKeyL(TInt aKey, TKeyPressLength /*aLength*/)

    {

    if(aKey==EKeyBackspace)

        {

        iOwner->ChangeState(EEntry);

        return ETrue;

        }

    if (aKey == EPtiKeyStar)

        {

        iOwner->FepMan()->TryCloseUiL();

        return EFalse;

        }   

    if(!( HandleVerticalNavigation(aKey) || HandleHorizontalNavigation(aKey) ))

        {

        // it may be one of the 'valid' numbers..

        TInt index = MapKeyToIndex(aKey);

        MAknFepUICtrlCandidatePane* candidatePane = UIContainer()->CandidatePane();

        if(candidatePane->SelectIndex(index) || aKey == EKeyOK)

            {

            TPtrC text = candidatePane->CurrentCandidate();

            if(text.Length()) 

                {            

                MAknFepManagerUIInterface* fepMan = iOwner->FepMan();

                fepMan->NewCharacterL(text);

                fepMan->CommitInlineEditL();

                if (fepMan->IsFlagSet(CAknFepManager::EFlagEditorFull))

                    {

                    fepMan->ClearFlag(CAknFepManager::EFlagEditorFull);

                    iOwner->FepMan()->TryCloseUiL();

                    }

                else

                    {

                    iOwner->ChangeState(EPredictiveCandidate);

                    UpdateIndicator();

                    }

                }

            else

                {

                // No candidates available. Back to Entry state.

                iOwner->ChangeState(EEntry);

                }

            }

        }

    return ETrue;

    }  

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

// TAknFepInputStateCandidateChinese::

// HandleHorizontalNavigation

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

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

//

TBool TAknFepInputStateCandidateChinese::HandleHorizontalNavigation(TInt aKey)

    {

    MAknFepUICtrlCandidatePane* candidatePane = UIContainer()->CandidatePane();

    CPtiEngine* ptiengine = iOwner->PtiEngine();

    TBool response = EFalse;

    // Do navigation...

    if (aKey == EKeyLeftArrow)

        {

        if (candidatePane->SelectedIndex() == 0 && 

            ptiengine->NumberOfCandidates() == 0)

            {

            return ETrue;

            }

        if(!candidatePane->SelectPrev())

            {

            ptiengine->PreviousCandidatePage();

            candidatePane->SetCandidateBuffer(ptiengine->CandidatePage());

            candidatePane->SelectLast();

            }

        response = ETrue;

        }

    else if (aKey == EKeyRightArrow)

        {

        TInt bufLength = iOwner->PtiEngine()->CandidatePage().Length();

        if (bufLength != KMaxCandidateCountFromCore &&

            candidatePane->SelectedIndex() == (bufLength -1))

            {

			return ETrue;

            }

        if(!candidatePane->SelectNext())

            {

            ptiengine->NextCandidatePage();

            candidatePane->SetCandidateBuffer(ptiengine->CandidatePage());

            candidatePane->SelectFirst();

            }

        response = ETrue;

        }

    if (response) 

        {

        UpdateIndicator();

        }

    return response;

    }

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

// TAknFepInputStateCandidateChinese::

// HandleVerticalNavigation

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

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

//

TBool TAknFepInputStateCandidateChinese::HandleVerticalNavigation(TInt aKey)

    {

    CPtiEngine* ptiengine = iOwner->PtiEngine();

    if (aKey == EKeyDownArrow)

        {

        if (iOwner->PtiEngine()->CandidatePage().Length() != 

            KMaxCandidateCountFromCore)

            {

            return ETrue; 

            }

        ptiengine->NextCandidatePage();

        }

    else if (aKey == EKeyUpArrow)

        {

        if (ptiengine->NumberOfCandidates() == 0)

            {

            return ETrue;            

            }

        ptiengine->PreviousCandidatePage();

        }

    else

        {

        return EFalse;

        }

    MAknFepUICtrlCandidatePane* candidatePane = UIContainer()->CandidatePane();

    candidatePane->SelectFirst();

    candidatePane->SetCandidateBuffer(ptiengine->CandidatePage());

    UpdateIndicator();

    return ETrue;

    }

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

// TAknFepInputStateCandidateChinese::

// UpdateIndicator

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

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

//

void TAknFepInputStateCandidateChinese::UpdateIndicator()

    {

    CPtiEngine* ptiengine = iOwner->PtiEngine();

    MAknFepUICtrlContainerChinese* uiContainer = UIContainer();        

    TInt bufLength = iOwner->PtiEngine()->CandidatePage().Length();

    MAknFepUICtrlCandidatePane* candidatePane = uiContainer->CandidatePane();

    if (ptiengine->NumberOfCandidates() == 0)

        {

        uiContainer->CandidatePane()->ShowUpScrollArrows(EFalse);    

        }

    else

        {

        uiContainer->CandidatePane()->ShowUpScrollArrows(ETrue);    

        }

    uiContainer->CandidatePane()->ShowDownScrollArrows

        (bufLength == KMaxCandidateCountFromCore ? ETrue : EFalse);

    if (candidatePane->SelectedIndex() == 0 && 

        ptiengine->NumberOfCandidates() == 0)

        {

        uiContainer->CandidatePane()->ShowLeftScrollArrows(EFalse);

        }

    else

        {

        uiContainer->CandidatePane()->ShowLeftScrollArrows(ETrue);

        }

    if (bufLength != KMaxCandidateCountFromCore &&

        candidatePane->SelectedIndex() == (bufLength -1))

        {

        uiContainer->CandidatePane()->ShowRightScrollArrows(EFalse);        

        }

    else

        {

        uiContainer->CandidatePane()->ShowRightScrollArrows(ETrue);

        }

    }

// End of file