/*

* 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:

*

* Description:           

*       Provides the aknfepinputstatecandidatepinyinphrasecreation definition.

*

*/

// System includes

#include <PtiEngine.h>   

#include <avkon.rsg>

#include <AknFep.rsg>

//#include <aknquerydialog.h> //CAknQueryDialog  

// User includes

#include "aknfepinputstatecandidatepinyinphrasecreation.h"

#include "AknFepUiCtrlContainerChinese.h"

#include "AknFepUICtrlCandidatePane.h"

#include "AknFepUICtrlPinyinPopup.h"        //Pinyin phrase

#include "aknfepuictrleditpane.h"           //pinyin phrase creation

#include "AknFepUIManagerStateInterface.h"  

#include "AknFepManager.h"     

// Constant definition

const TInt KMinCnadidateCount = 1;

const TInt KMaxSpellingLength = 10;

const TInt KMaxPhraseCreationCount = 7;

//add  the max phrase is seven

_LIT( KMaxPhraseNote,"\x8BCD\x7EC4\x6700\x957F\x4E3A\x4E03\x5B57" );

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

// AknFepUiInputStateCandidatePinyinAndStrokePhrase::

// TAknFepUiInputStateCandidatePinyinAndStrokePhrase

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

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

//

TAknFepInputStateCandidatePinyinPhraseCreation::

    TAknFepInputStateCandidatePinyinPhraseCreation(

        MAknFepUIManagerStateInterface* aOwner,

        MAknFepUICtrlContainerChinese* aUIContainer) :

        TAknFepInputStatePinyinPhraseCreationBase( aOwner, aUIContainer)

    {

    iState = ECandidateSelection;

    MAknFepUICtrlContainerChinese* uiContainer = UIContainer();

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

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

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

    TBool showHorizontalScrollArrows = multiplePages || bufLength > KMinCnadidateCount;

    uiContainer->ShowHorizontalScrollArrows(showHorizontalScrollArrows); 

    uiContainer->ShowVerticalScrollArrows(ETrue);

    uiContainer->FocusCandidatePane(ETrue);

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

    uiContainer->CandidatePane()->SelectFirstPhrase();

    uiContainer->SetFepMan( iOwner->FepMan() );

    UpdateIndicator();

    ChangeCba();

    }

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

// TAknFepInputStateCandidatePinyinPhraseCreation::HandleKeyL

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

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

//

TBool TAknFepInputStateCandidatePinyinPhraseCreation::HandleKeyL(TInt aKey,

                                                                 TKeyPressLength aLength)

    {

    switch( aKey )

        {

        case EKeyBackspace:

            KeyBackspace();

            break;

        case EKeyCBA2:

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

            break;

        default:

            HandleKeyUpDownLeftRightArrowOrKeyCBA1OKL( aKey, aLength );

            break;

        }

    return ETrue;

    }

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

// Update indicator.

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

//

void TAknFepInputStateCandidatePinyinPhraseCreation::UpdateIndicator()

    {

    MAknFepUICtrlContainerChinese* uiContainer = UIContainer();        

    MAknFepUICtrlCandidatePane* candidatePane = uiContainer->CandidatePane();

    if (candidatePane->IsFirstPage())

        {

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

        }

    else

        {

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

        }

    if ( candidatePane->IsLastPage() )

       {

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

       }

    else

       {

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

       }

    }

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

// Handle horizontal navigation.

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

//

TBool TAknFepInputStateCandidatePinyinPhraseCreation::HandleHorizontalNavigation(TInt aKey)

    {

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

    TBool response = EFalse;

    // Do navigation...

    if (aKey == EKeyLeftArrow)

        {

        if( !candidatePane->SelectPrev() )

            {

            candidatePane->SetCandidateBuffer();

            candidatePane->SelectLastPhrase();

            }

        response = ETrue;

        }

    else if (aKey == EKeyRightArrow)

        {                  

        if( !candidatePane->SelectNext() )

            {

            candidatePane->SetCandidateBuffer();

            candidatePane->SelectFirstPhrase();

            }

        response = ETrue;

        }

    if (response)

        {

        UpdateIndicator();

        }   

    return response;

    }

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

// Handle vertical navigation.

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

//

TBool TAknFepInputStateCandidatePinyinPhraseCreation::HandleVerticalNavigation(TInt aKey)

    {

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

    if (aKey == EKeyDownArrow)

        {

        if (candidatePane->IsLastPage())

            {

            return ETrue;

            }                

        candidatePane->NextCandidatePage();

        }

    else if (aKey == EKeyUpArrow)

        {

        if (candidatePane->IsFirstPage() )

            {

            return ETrue;   

            }       

        candidatePane->PreviousCandidatePage();

        }

    else

        {

        return EFalse;

        }

    candidatePane->SetCandidateBuffer();

    candidatePane->SelectFirstPhrase();

    UpdateIndicator(); 

    return ETrue;

    }

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

// Commit inline to the EEP ctrl.

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

//

TBool TAknFepInputStateCandidatePinyinPhraseCreation::CommitInlineEEPL( const TDesC& aText )

    MAknFepUICtrlPinyinPopup* popup = UIContainer()->PinyinPopupWindow();

    CDesCArrayFlat* keystrokeArray = popup->ShowKeystrokeArray();

    CDesCArrayFlat* validKeystroke = popup->InEffectKeystrokeArray();

    CDesCArrayFlat* chooseChineseCharacterArray = 

        popup->ChooseChineseCharacterArray();

    CDesCArrayFlat* chooseChineseCharacterArrayKeystroke = 

        popup->ChooseChineseCharacterArrayKeystroke();

    TInt keyCount = validKeystroke->Count();

    TBuf<KMaxSpellingLength> keystroke;

    popup->SetPhraseCreationState( ETrue );

    for ( TInt i = 0; i < keyCount; i++ )

        {

        keystroke.Append( keystrokeArray->MdcaPoint( 0 ) );

        keystrokeArray->Delete( 0 );

        }

    chooseChineseCharacterArray->AppendL( aText );

    chooseChineseCharacterArrayKeystroke->AppendL( keystroke );

    validKeystroke->Reset();

    if ( chooseChineseCharacterArray->Count() >= KMaxPhraseCreationCount )

        {

        keystrokeArray->Reset();

        CDesCArrayFlat* phraseCandidates = 

            UIContainer()->CandidatePane()->CandidateArray();

        phraseCandidates->Reset();

        phraseCandidates->AppendL( KMaxPhraseNote );

        RefreshUI( 0 );

        return EFalse;

        }  

    return keystrokeArray->Count();

    }

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

// KeyBackspace.

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

//

void TAknFepInputStateCandidatePinyinPhraseCreation::KeyBackspace()

    {

    MAknFepUICtrlPinyinPopup* popup = UIContainer()->PinyinPopupWindow();

    // there is  "ChangeCba()" before 

    popup->SetChangeState( ETrue );

    iOwner->ChangeState(ESpellingSelection);

    }

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

// Key Up,Down,Left,RightArrow Or Key CBA1,OK.

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

//

void TAknFepInputStateCandidatePinyinPhraseCreation::HandleKeyUpDownLeftRightArrowOrKeyCBA1OKL( 

                                     TInt aKey, 

                                     TKeyPressLength aLength )

    {

    MAknFepUICtrlPinyinPopup* popup = UIContainer()->PinyinPopupWindow();

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

    TInt index = MapKeyToIndex(aKey);

    if ( aKey == EKeyUpArrow &&

        iOwner->FepMan()->InputMode() == EPinyin &&

        candidatePane->IsFirstPage())

        {

        popup->SetChangeState( ETrue );

        iOwner->ChangeState(ESpellingSelection);

        return;

        }

    TBool state = ETrue;

    if ( popup->IsChangeStatet() && aLength == ELongKeyPress )

        {

        state = EFalse;

        }

    else

        {

        popup->SetChangeState( EFalse );

        }

    if ( state )

       {

       if ( !(HandleVerticalNavigation( aKey )

           || HandleHorizontalNavigation( aKey ) ) )

         {

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

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

               || aKey == EKeyCBA1 )

              {

               ChangeStateOrNotL(); 

              }

           ChangeCba();

          }

       }

    }

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

// change the state or not 

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

//

void TAknFepInputStateCandidatePinyinPhraseCreation::ChangeStateOrNotL()

	{

	 MAknFepUICtrlPinyinPopup* popup = UIContainer()->PinyinPopupWindow();

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

    TPtrC text = candidatePane->CurrentPhraseCandidate();

    if ( text.Length() )

        {

        CDesCArrayFlat* chooseChineseCharacterArray =

            popup->ChooseChineseCharacterArray();

        //here need Commit text to EEP and change 

        //state to EEP entry state if keystroke is empty

        //else keep spelling state 

        if ( chooseChineseCharacterArray->Count() < KMaxPhraseCreationCount )

            {

            if ( !CommitInlineEEPL( text ) )

                {

                popup->SetChangeState( ETrue );

                iOwner->ChangeState( EKeySequenceEdit );

                TBool visible =

                    ( chooseChineseCharacterArray->Count() == KMaxPhraseCreationCount );

                UIContainer()->SetControlInVisible( visible );

                }

            else

                {

                if ( !popup->IsEnabled() )

                    {

                    popup->Enable( ETrue );

                    }

                if ( !GetValidKeystroke() )

                    {

                    UIContainer()->SetControlInVisible( EFalse );

                    popup->SetChangeState( ETrue );

                    iOwner->ChangeState( EKeySequenceEdit );

                    }

                else

                    {

                    popup->SetChangeState( ETrue );

                    iOwner->ChangeState( ESpellingSelection );

                    }

                }

            }

        else

            {

            popup->SetChangeState( ETrue );

            iOwner->ChangeState( EKeySequenceEdit );

            }

        }

    else

        {

        // No candidates available. Back to Entry state.

        popup->SetChangeState( ETrue );

        iOwner->ChangeState( EKeySequenceEdit );

        }

    }

// End of file