/*

* Copyright (c) 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:           

*       Provides the TAknFepInputStatePredictiveInputQwerty methods.

*

*/

#include "AknFepUiInputStatePredictiveInputQwertyPinyin.h"

#include "AknFepUICtrlCandidatePane.h"

#include "AknFepUiCtrlContainerChinese.h"

#include "AknFepUIManagerStateInterface.h"  //MAknFepUIManagerStateInterface

#include "AknFepManagerUIInterface.h"       //MAknFepManagerUIInterface

#include "AknFepManager.h"                  //FepMan flag

#include <PtiEngine.h>                      //CPtiEngine

TAknFepInputStatePredictiveInputQwertyPinyin::TAknFepInputStatePredictiveInputQwertyPinyin(

                                MAknFepUIManagerStateInterface* aOwner,

                                MAknFepUICtrlContainerChinese* aUIContainer)

    :TAknFepInputStateCandidateQwertyChineseBase(aOwner, aUIContainer)

    {

    iState = EPredictiveInput;

    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);

    uiContainer->SetLayout(MAknFepUICtrlContainerChinese::ELayoutCandidate);

    CPtiEngine* ptiengine = iOwner->PtiEngine();

    ptiengine->SetCandidatePageLength(MAknFepUICtrlContainerChinese::ELayoutInput);

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

    TPtrC text = uiContainer->CandidatePane()->CurrentCandidate();

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

    ptiengine->SetPredictiveChineseChar(text);

    uiContainer->CandidatePane()->SetCandidateBuffer(ptiengine->CandidatePage());

    TBool multiplePages = ptiengine->MoreCandidatePages();

    TInt bufLength = ptiengine->CandidatePage().Length();

    TBool showHorizontalScrollArrows = multiplePages || bufLength>1;

    uiContainer->ShowVerticalScrollArrows(multiplePages);

    uiContainer->ShowHorizontalScrollArrows(showHorizontalScrollArrows);

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

    UpdateIndicator();

    }

TBool TAknFepInputStatePredictiveInputQwertyPinyin::HandleKeyL(TInt aKey, TKeyPressLength aLength)

    {

    TBool ret = ETrue;

    if (iOwner->FepMan()->IsFlagSet(CAknFepManager::EFlagQwertyShiftMode) ||

        iOwner->FepMan()->IsFlagSet(CAknFepManager::EFlagQwertyChrKeyDepressed))

        {

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

        ret = EFalse;

        }

    else if (IsValidEntryKey(aKey))

        {

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

        ret = EFalse;

        }

    else if(aKey == EStdKeyBackspace)

        {

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

        }

    else if(aKey == EStdKeyLeftFunc && aLength == EShortKeyPress)

        {

        MAknFepManagerUIInterface* fepMan = iOwner->FepMan();

        if (fepMan->IsAbleToLaunchSCT())

            {

            fepMan->LaunchSpecialCharacterTableL();

            }

        }

    else if(iOwner->IsValidChineseInputKeyQwerty(aKey))

        {

        if (IsValidPinyinKey(aKey))

            {

            CPtiEngine* ptiengine = iOwner->PtiEngine();

            // it is needed when we use phrase input engine, otherwise it seems not cleared

            ptiengine->ClearCurrentWord(); 

            ptiengine->ResetToneMark();

            iOwner->ChangeState(EEntry);

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

            }

        }

    else 

        {

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

        }

    return ret;

    }

TBool  TAknFepInputStatePredictiveInputQwertyPinyin::IsValidPinyinKey(TInt aKey)

    {

    TBool response = ETrue;

    if (aKey == EPtiKeyQwertyU || aKey == EPtiKeyQwertyV ||

        aKey == EPtiKeyQwertyI )

        {

        iOwner->FepMan()->PlaySound(EAvkonSIDErrorTone);

        response = EFalse;

        }

    return response;

    }

TBool  TAknFepInputStatePredictiveInputQwertyPinyin::IsValidEntryKey(TInt aKey)

    {

    TBool response = ETrue;

    if ((aKey >= EPtiKeyQwertyA && aKey <= EPtiKeyQwertyZ) ||

        (aKey >= EStdKeyLeftArrow && aKey <= EStdKeyDownArrow) ||

        (aKey >= EPtiKeyQwerty0 && aKey <= EPtiKeyQwerty9) ||

         aKey == EStdKeyBackspace || aKey == EStdKeyLeftFunc ||

         aKey == EStdKeyDevice1)

        {

        response = EFalse;

        }

    return response;

    }    

// End of file