/*
* 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 CAknFepUIInputStateEntryQwertyPinyin methods.
*
*/












#include "AknFepUIManagerStateInterface.h"  //MAknFepUIManagerStateInterface
#include "AknFepUiCtrlContainerChinese.h"
#include "AknFepManagerUIInterface.h"       //MAknFepManagerUIInterface
#include "AknFepUICtrlCandidatePane.h"
#include "AknFepUICtrlInputPane.h"
#include "AknFepUiInputStateEntryQwertyPinyin.h"
#include "AknFepManager.h"                  //FepMan flag

#include <PtiEngine.h>      //CPtiEngine
#include <e32keys.h>        //keys  
#include <avkon.rsg>

const TText KPinyinTone4Valid = 0x02D9;
const TText KPinyinTone4Invalid = 0x0020;
const TInt KMaxCandidateCountFromCore = 6;

TAknFepInputStateEntryQwertyPinyin::TAknFepInputStateEntryQwertyPinyin(
                               MAknFepUIManagerStateInterface* aOwner,
                               MAknFepUICtrlContainerChinese* aUIContainer)
    :TAknFepInputStateEntryQwertyBase(aOwner,aUIContainer)                           
    {
    UIContainer()->CandidatePane()->ShowCandidateOrdinals(ETrue);
    CPtiEngine* ptiengine = iOwner->PtiEngine();
    ptiengine->SetInputMode(EPtiEnginePinyinQwerty);
    ptiengine->SetCase(EPtiCaseLower);
    ptiengine->SetCandidatePageLength(MAknFepUICtrlContainerChinese::ELayoutInput);
    UpdateIndicator();
    }

TBool TAknFepInputStateEntryQwertyPinyin::HandleKeyL(TInt aKey, TKeyPressLength aLength)
    {
    CPtiEngine* ptiengine = iOwner->PtiEngine();
    MAknFepUICtrlContainerChinese* uiContainer = UIContainer();    
    TBool ret = ETrue;

    if((aKey == EStdKeyLeftFunc) && (aLength == EShortKeyPress))
        {
        if(ptiengine->IncrementToneMark(ETrue))
            {
            RefreshUI();
            }
        }
    else if(aKey == EStdKeyBackspace)
        {
		if (iOwner->PtiEngine()->DeleteKeyPress().Length())
            {
            RefreshUI();
            }
        else
            {
            iOwner->FepMan()->TryCloseUiL();
            if (aLength == ELongKeyPress)
                {
                iOwner->FepMan()->SetLongClearAfterCloseUI(ETrue);
                }
            }
        }        
    else if((aLength == EShortKeyPress) && iOwner->IsValidChineseInputKeyQwerty(aKey))
        {
        TInt stringBeforeLength(0);
        TInt stringAfterLength(0);
        
        stringBeforeLength = ptiengine->GetPhoneticSpelling(1).Length();
        stringAfterLength = ptiengine->AppendKeyPress((TPtiKey)aKey).Length();
        
        if (stringBeforeLength != stringAfterLength)
            {
            if (ptiengine->GetPhoneticSpelling(1).Length() == 1)
            {
            iOwner->FepMan()->UpdateCbaL(R_AVKON_SOFTKEYS_EMPTY);
            }            
            RefreshUI();
            }
	    else
	        {
	        iOwner->FepMan()->PlaySound(EAvkonSIDErrorTone);
	        }            
        
        if (ptiengine->GetPhoneticSpelling(1).Length() == 0)
            {
            iOwner->FepMan()->UpdateCbaL(NULL);
            }
        }        
    else if(aKey == EStdKeyDevice1)
        {
        iOwner->FepMan()->TryCloseUiL();
        }
    else 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 == EStdKeyDevice3 || aKey == EStdKeyEnter)
            {
            TPtrC text = candidatePane->CurrentCandidate();
            if(text.Length())
                {            
                MAknFepManagerUIInterface* fepMan = iOwner->FepMan();
                iOwner->FepMan()->NewCharacterL(text);
                iOwner->FepMan()->CommitInlineEditL();
                if (iOwner->FepMan()->IsFlagSet(CAknFepManager::EFlagEditorFull))
                    {
                    iOwner->FepMan()->ClearFlag(CAknFepManager::EFlagEditorFull);
                    iOwner->FepMan()->TryCloseUiL();
                    }
                else
                    {
                    iOwner->ChangeState(EPredictiveInput);
                    }
                }
            else
                {
                // No candidates available. Back to Entry state.
                iOwner->ChangeState(EEntry);
                }
            }
        }
    return ret;
    }

void TAknFepInputStateEntryQwertyPinyin::RefreshUI()
    {
    CPtiEngine* ptiengine = iOwner->PtiEngine();
    MAknFepUICtrlContainerChinese* uiContainer = UIContainer();
    MAknFepUICtrlInputPane* inputPane = uiContainer->InputPane();
    
    SetInputPaneToneMark();    

    TPtrC ptr = ptiengine->GetPhoneticSpelling(1);
    TBool multiplePages = ptiengine->MoreCandidatePages();
    TInt bufLength = ptiengine->CandidatePage().Length();
    TBool showHorizontalScrollArrows = multiplePages || bufLength>1;
            
    UIContainer()->ShowHorizontalScrollArrows(showHorizontalScrollArrows); 
    UIContainer()->ShowVerticalScrollArrows(multiplePages);
    
    // set container's position
    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);    
        }
  
    TText toneMark;
    TBool toneMarkEntered = ptiengine->ToneMark(toneMark);
    TBuf<1> validToneMarkBuf;
    if(toneMarkEntered)
        {
        // override specific invalid tonemark character only, the others are the same character 
        // when both valid and invalid
        if(toneMark == KPinyinTone4Invalid)
            toneMark = KPinyinTone4Valid;
        validToneMarkBuf.Append(toneMark);
        }

    ptiengine->EnableToneMarks(ETrue);
 
    if (ptr.Length() > 0)
        {
        TPtrC candidates = ptiengine->CandidatePage();
        uiContainer->CandidatePane()->SetCandidateBuffer(candidates);
        uiContainer->Enable(ETrue);
        uiContainer->CandidatePane()->SelectFirst();
        
        inputPane->SetText(ptr);
        inputPane->SetToneMark(validToneMarkBuf);  
     
        UpdateIndicator();
        }
    }
    
TBool TAknFepInputStateEntryQwertyPinyin::HandleHorizontalNavigation(TInt aKey)
    {
    MAknFepUICtrlCandidatePane* candidatePane = UIContainer()->CandidatePane();
    CPtiEngine* ptiengine = iOwner->PtiEngine();
    TBool response = EFalse;

    // Do navigation...
    if (aKey == EStdKeyLeftArrow)
        {
        if (candidatePane->SelectedIndex() == 0 && 
            ptiengine->NumberOfCandidates() == 0)
            {
            return ETrue;
            }
        
        if(!candidatePane->SelectPrev())
            {
            ptiengine->PreviousCandidatePage();
            candidatePane->SetCandidateBuffer(ptiengine->CandidatePage());
            candidatePane->SelectLast();
            }
        UpdateIndicator();            
        response = ETrue;
        }
    else if (aKey == EStdKeyRightArrow)
        {
        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();
            }
        UpdateIndicator();    
        response = ETrue;
        }
    return response;
    }

TBool TAknFepInputStateEntryQwertyPinyin::HandleVerticalNavigation(TInt aKey)
    {
    CPtiEngine* ptiengine = iOwner->PtiEngine();

    if (aKey == EStdKeyDownArrow || aKey == EStdKeySpace)
        {
        if (iOwner->PtiEngine()->CandidatePage().Length() != 
            KMaxCandidateCountFromCore)
            {
            return ETrue;
            }
        ptiengine->NextCandidatePage();
        }
    else if (aKey == EStdKeyUpArrow)
        {
        if (ptiengine->NumberOfCandidates() == 0)
            {								 
            return ETrue;
            }
        ptiengine->PreviousCandidatePage();
        }
    else
        {
        return EFalse;
        }

    MAknFepUICtrlCandidatePane* candidatePane = UIContainer()->CandidatePane();
    candidatePane->SelectFirst();
    candidatePane->SetCandidateBuffer(ptiengine->CandidatePage());
    UpdateIndicator();
    return ETrue;
    }
 
 void TAknFepInputStateEntryQwertyPinyin::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);
        }
    }
    
// ---------------------------------------------------------------------------
// TAknFepInputStateEntryQwertyPinyin::HandleCommandL
// Handling Command
// ---------------------------------------------------------------------------
//
 void TAknFepInputStateEntryQwertyPinyin::HandleCommandL( TInt aCommandId )
    {
    TAknFepInputStateChineseBase::HandleCommandL( aCommandId );
    }
// End of file