/*

* 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 predictive candidate chinese phrase state

*

*/

#include "AknFepUiInputStatePredictiveCandidateChinesePhrase.h"

#include "AknFepUICtrlCandidatePane.h"

#include "AknFepUiCtrlContainerChinese.h"

#include "AknFepUIManagerStateInterface.h"  //MAknFepUIManagerStateInterface

#include "AknFepManagerUIInterface.h"       //MAknFepManagerUIInterface

#include <PtiEngine.h>                      //CPtiEngine

TAknFepInputStatePredictiveCandidateChinesePhrase::

TAknFepInputStatePredictiveCandidateChinesePhrase(

                                MAknFepUIManagerStateInterface* aOwner,

                                MAknFepUICtrlContainerChinese* aUIContainer)

    :TAknFepInputStateCandidateBaseChinesePhrase(aOwner, aUIContainer)

    {

    iState = EPredictiveCandidate;

    MAknFepUICtrlContainerChinese* uiContainer = UIContainer();

    // set container window position to follow cursor

    TPoint baseLine = TPoint(0,0);

    TInt height = 0;

    TInt ascent = 0;

    TRAPD(ret,iOwner->FepMan()->GetScreenCoordinatesL(baseLine,height,ascent));

    if (ret == KErrNone)

        {

        uiContainer->SetContainerPosition(baseLine, height);    

        }

    uiContainer->FocusCandidatePane(ETrue);

    CPtiEngine* ptiengine = iOwner->PtiEngine();

    MAknFepUICtrlCandidatePane* candidatePane = uiContainer->CandidatePane();

    // for some reason needs to feed back to ptiengine current Chinese phrase just before get the prediction

    TPtrC text = candidatePane->CurrentPhraseCandidate();

    candidatePane->SelectFirstPhrase(); 

    ptiengine->SetPredictiveChineseChar(text);

    TRAPD(ignore,ptiengine->GetChinesePhraseCandidatesL(*(candidatePane->CandidateArray())));

    if (ignore == KErrNone)

        {

        candidatePane->SplitPhraseCandidatesIntoPages(); 

        uiContainer->SetLayout(MAknFepUICtrlContainerChinese::ELayoutCandidate);

        candidatePane->SetCandidateBuffer();

        TBool multiplePages = !(uiContainer->CandidatePane()->IsLastPage() &&

                                uiContainer->CandidatePane()->IsFirstPage());

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

        TBool showHorizontalScrollArrows = multiplePages || bufLength>1;

        uiContainer->ShowHorizontalScrollArrows(showHorizontalScrollArrows); 

        uiContainer->ShowVerticalScrollArrows(multiplePages);

        candidatePane->ShowCandidateOrdinals(EFalse);

        UpdateIndicator();

        }

    }

TBool TAknFepInputStatePredictiveCandidateChinesePhrase::HandleKeyL(TInt aKey, 

                                                                    TKeyPressLength aLength)

    {

    TBool ret = ETrue;

    if(iOwner->IsValidChineseInputKey(aKey) && aLength != ELongKeyPress)

        {

        CPtiEngine* ptiengine = iOwner->PtiEngine();

        // needs to clear current word for current engine, otherwise buffer is not cleared

        ptiengine->ClearCurrentWord(); 

        ptiengine->ResetToneMark();

        iOwner->ChangeState(EEntry);

        ret = EFalse; //passes to entry state to handle the key

        }

    if(!HandleVerticalNavigation(aKey))

        {

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

        // Do navigation...

        if (aKey == EKeyLeftArrow && aLength != ELongKeyPress)

            {

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

//                candidatePane->IsFirstPage() )

//                {

//                return ETrue;

//                }

//            else 

                {

                iOwner->ChangeState(EPredictiveInput);

                ret = EFalse; //passes to predictive input state to handle the key

                } 

            }

        else if (aKey == EKeyRightArrow && aLength != ELongKeyPress)

            {

            if (candidatePane->IsLastPage() && 

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

                {

                return ETrue;    

                }

            else

                {

                iOwner->ChangeState(EPredictiveInput);

                return EFalse;

                }

            }

        else if ( ( aKey == EKeyOK || aKey == EKeyCBA1 ) && aLength != ELongKeyPress)

            {

            iOwner->ChangeState(EPredictiveInput);

            ret = EFalse; //passes to predictive input state to handle the key

            }

        else if(aKey == EKeyBackspace && aLength != ELongKeyPress)

            {

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

            }

        else if (aKey == EPtiKeyStar && aLength != ELongKeyPress)

            {

            ret = TAknFepInputStateCandidateBaseChinesePhrase::HandleKeyL(aKey, aLength);

            }   

        }

    return ret;

    }

// End of file