/*

* Copyright (c) 2007 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 TAknFepInputStateHalfQwerty methods.

*

*/

#include "AknFepUiInputStateHalfQwerty.h"

#include "AknFepUIManagerStateInterface.h"      //MAknFepUIManagerStateInterface

#include "AknFepManagerUIInterface.h"           //MAknFepManagerUIInterface

#include "AknFepCaseManager.h"

#include <PtiEngine.h>

#include <PtiDefs.h>

#include <PtiKeyMappings.h>

#include <centralrepository.h> 

#include <AknFepInternalCRKeys.h>       

TAknFepInputStateHalfQwerty::TAknFepInputStateHalfQwerty(MAknFepUIManagerStateInterface* aOwner)

    :TAknFepInputStateBase(aOwner)

    {

    iState = EInitial;

    iData = 0;

    CPtiEngine* ptiengine = iOwner->PtiEngine();

    ptiengine->ClearCurrentWord();

    ptiengine->SetInputMode(EPtiEngineHalfQwerty);

    }

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

    {

    TBool ret = EFalse;

    CPtiEngine* ptiengine = iOwner->PtiEngine();

    if( ptiengine == NULL || aKey == EStdKeyNull || 

    		aKey == EStdKeyF21 || aKey == EKeyF21 || aKey == EKeyF20 || aKey == EKeyF19 ||

		aKey == EStdKeyLeftArrow || aKey == EStdKeyRightArrow || aKey == EStdKeyDownArrow || aKey == EStdKeyUpArrow )

        return ret;

    MAknFepManagerUIInterface* fepMan = iOwner->FepMan();

    CAknFepFnKeyManager::TFnKeyState fnKeyState  = fepMan->FnKeyState();    

    TPtiTextCase CurCase = ptiengine->Case();

    if (iData && (iData != aKey) )

        {

        ptiengine->CancelTimerActivity();        

        fepMan->CommitInlineEditL();      

        ptiengine->ClearCurrentWord();        

        fepMan->ClearFlag(CAknFepManager::EFlagInsideMultitapInlineEditingTransaction);

        iData = 0;

        }

    // if it is a long key press of the punctuation key,

	  if( aLength == ELongKeyPress && aKey == EStdKeyFullStop)

	  	{

	  	// Commit the current word and then do the usual stuff

	  	ptiengine->CancelTimerActivity();	  		  	

	  	}

	if( !fepMan->EditorHasFreeSpace() && !iData )

		{

		// Do not proceed as we have reached max limit and timer has expired

		ptiengine->CancelTimerActivity();

		ptiengine->ClearCurrentWord();        

        fepMan->ClearFlag(CAknFepManager::EFlagInsideMultitapInlineEditingTransaction);

        return 0;

        }

    if( EStdKeyEnter == aKey )

		{

		// Asynchronous case update.

		fepMan->SimulateKeyEventL(EKeyF19);

		return 0;

		}

    if (!iOwner->PtiEngine()->IsValidKey((TPtiKey)aKey))

        {     

        iData = 0;

        ChrKeyTimerExpired();

        fepMan->ClearFlag(CAknFepManager::EFlagInsideMultitapInlineEditingTransaction);        

        ptiengine->CancelTimerActivity();		                

        return ret;

        }

  TPtrC text;

  /*

        if ( fepMan->IsOnlyNumericPermitted() )    

            {

            ptiengine->CancelTimerActivity();       

            text.Set(ptiengine->AppendKeyPress((TPtiKey)aKey)); 

            TPtrC numericChars(KAllAllowedNumericChars, KNumAllowedIdleNumericChars);   

            if (text.Length() && numericChars.Locate(text[0]) != KErrNotFound)

                {

                TBuf<1> chr;    

                chr.Append(text[0]);

                fepMan->NewCharacterL(chr);             

                ptiengine->CancelTimerActivity();        

                fepMan->CommitInlineEditL();      

                ptiengine->ClearCurrentWord();                                      

                }

            return ETrue;

            }

 */

#ifdef __REVERSE_FN_KEY_SUPPORTED

	TInt origLanguage = ptiengine->CurrentLanguage()->LanguageCode();

    TPtiEngineInputMode origInputMode = ptiengine->InputMode();

    TBool languageChanged = EFalse;

    // In reverse fn key mapping filter the char applicable for

    // Numeric editor.

    if( fepMan->IsOnlyNumericPermitted() )

        {

        if( EStdKeyLeftFunc == aKey )

            {

            TCallBack timerExpire(TimerExpire, this);

            fepMan->MultitapThroughSCTCharL(timerExpire); 

            return ETrue;

            }

        else 

            {

            ChrKeyTimerExpired();

            }

        if( !fepMan->IsValidCharForNumericInFnReverseL( aKey, iOwner->PtiEngine()->Case() ) )

            {

            if(CheckHasValidNumerKeyMappedL(aKey,languageChanged))

                return ETrue;

            }

        }

#endif //__REVERSE_FN_KEY_SUPPORTED

//    if( aLength == EShortKeyPress )

        {

        /*

        if (aKey == EStdKeySpace && (fnKeyState == CAknFepFnKeyManager::EFnKeyNone))

            {

            _LIT(KSpaceCharacter, " ");

            text.Set(KSpaceCharacter);        

            }        

        else*/ 

   if( aKey == EStdKeySpace && fepMan->FnKeyState() == CAknFepFnKeyManager::EFnKeyNone)

    		{

    		_LIT(KSpace," "); 

			fepMan->StartInlineEditL();

            fepMan->UpdateInlineEditL(KSpace,0);

            fepMan->CommitInlineEditL();

        	return ETrue;        		

    		}    

        else

            {

            TBool isCharacter = ETrue;

            if (!iData)

                {

                isCharacter = IsCharacterKey(aKey);

                }

            HandleCaseChange(aKey, isCharacter);        

            CurCase = ptiengine->Case();

            if(( (fepMan->IsHybridAplhaEditor() && !fepMan->IsHybridAlphaModeChangedtoAplhanumeric())

                    || fepMan->IsPhoneNumberEditor() )

                    && fepMan->FnKeyState() != CAknFepFnKeyManager::EFnKeyNone)

            {            

            if( EStdKeyLeftFunc == aKey )

                {

                TCallBack timerExpire(TimerExpire, this);

                fepMan->MultitapThroughSCTCharL(timerExpire); 

                return ETrue;

                }

            else

                { 

                ChrKeyTimerExpired();

                }	

            if(!fepMan->IsPhoneNumberEditor())

			{

				TChar validchr;

				if(!CheckHasValidNumerKeyMappedL(aKey,languageChanged))

					ptiengine->SetCase((TPtiTextCase)EPtiCaseLower);

				else

					return ETrue;

			}

            }

            if(!iData)

            	{

            	// this should be called after case change 

            	// so that the shift state is taken care of

            	#ifdef __HALF_QWERTY_PREVIEW_PANE

                	fepMan->PreparePreviewPaneL((TPtiKey)aKey);

				#endif //__HALF_QWERTY_PREVIEW_PANE

            	}

            // Over ride the case changes, force to fnLower for 

            // long key press.

            if( aLength == ELongKeyPress && aKey == EStdKeyFullStop)

            	{

            	iOwner->PtiEngine()->SetCase( EPtiCaseFnLower );

            	}

            // Get keymapping from PtiEngine.                

            text.Set(ptiengine->AppendKeyPress((TPtiKey)aKey));

            // send the text to be highlighted here

            #ifdef __HALF_QWERTY_PREVIEW_PANE

            	fepMan->ShowPaneL();

			#endif //__HALF_QWERTY_PREVIEW_PANE            	

            }

        if (text.Length() > 0)        

             {               

            TBuf<1> chr;    

            chr.Append(text[0]);

            if( fepMan->IsOnlyNumericPermitted() 

            	&& !iOwner->FepMan()->IsValidCharInNumericEditorL(text[0]) )

            	{

            	ptiengine->CancelTimerActivity(); 

#ifdef __REVERSE_FN_KEY_SUPPORTED            	

	            if(languageChanged)

    	            {

        	        ptiengine->ActivateLanguageL(origLanguage);

            	    ptiengine->SetInputMode(origInputMode );            		

                	}            

#endif                		

	            if(fepMan->IsHybridAplhaEditor() && !fepMan->IsHybridAlphaModeChangedtoAplhanumeric())

					ptiengine->SetCase(CurCase);      		

            	return ETrue;

            	}            

            if(fepMan->IsHybridAplhaEditor() && !fepMan->IsHybridAlphaModeChangedtoAplhanumeric()

                                            && fepMan->FnKeyState() != CAknFepFnKeyManager::EFnKeyNone)

                {

                if(!iOwner->FepMan()->IsValidCharInNumericEditorL(text[0]) )

                    {

                    ptiengine->CancelTimerActivity(); 

#ifdef __REVERSE_FN_KEY_SUPPORTED               

                    if(languageChanged)

                        {

                        ptiengine->ActivateLanguageL(origLanguage);

                        ptiengine->SetInputMode(origInputMode );                    

                        }            

#endif  

                    }

            	}

            fepMan->NewCharacterL(chr);

           // if ( aKey == EStdKeyEnter)

           //     {

           //     fepMan->CommitInlineEditL();      

           //     ptiengine->ClearCurrentWord();                

           //     iData = 0;

           //     }

           // else            

           //     {    

                iData = aKey;            

                fepMan->SetFlag(CAknFepManager::EFlagInsideMultitapInlineEditingTransaction);                   

            //    }

            }

        if((text.Length() > 0) || (IsKeymapped(aKey)))

            {

            ret = ETrue;

            }

        TBuf<32> mappedCharacters;

        iOwner->PtiEngine()->MappingDataForKey((TPtiKey)aKey, mappedCharacters, iOwner->PtiEngine()->Case());

        if( mappedCharacters.Length() < 2 )

            {

            ptiengine->CancelTimerActivity(); 

            if( aLength == EShortKeyPress )

            	{            	

            	SetShortKeyPressText(text);

            	}

            }

		if(fepMan->IsHybridAplhaEditor() && !fepMan->IsHybridAlphaModeChangedtoAplhanumeric())

			ptiengine->SetCase(CurCase);

    }

// else

// //Long key press

//    {

//        if (aKey == EStdKeyEnter)

//            {

            // PtiEngine does not have mapping for the enter key.

//            const TText KAknFEPLineFeedSymbol = 0x21B2;

//            TBuf<1> lineFeed;

//            lineFeed.Zero();

//            lineFeed.Append(KAknFEPLineFeedSymbol);

//            text.Set(lineFeed);

//            }

//        else

//            {

//            TBool isCharacter = ETrue;

//            if (!iData)

//            {

//            isCharacter = IsCharacterKey(aKey);

//            }

//            //HandleCaseChange(aKey, isCharacter);

//            //Forcing Fn mode for long key press

//            

//            /*

//            //Start of Option-1

//            ptiengine->SetCase(EPtiCaseFnLower);

//            text.Set(ptiengine->AppendKeyPress((TPtiKey)aKey));

//            // End of Option-1

//            */

//

//            //Start of Option-2

//            //To do: Space key lower case being mapped and removing 

//            //hard coding of space in UI State.

//            TBuf<5> allFnMappedCharacters;

//            ptiengine->MappingDataForKey((TPtiKey)aKey, allFnMappedCharacters, EPtiCaseFnLower);

//            text.Set(allFnMappedCharacters);

//            // End of Option-2

//

//            }

//        #ifdef __HALF_QWERTY_PREVIEW_PANE

//        // in any case hide the preview pane

//        	fepMan->HidePane();

//		#endif //__HALF_QWERTY_PREVIEW_PANE

//            

//        if (text.Length() > 0)        

//            {               

//            TBuf<1> chr;    

//            chr.Append(text[0]);

//            fepMan->NewCharacterL(chr);

//            fepMan->CommitInlineEditL();      

//            ptiengine->ClearCurrentWord();                

//            iData = 0;

//            /*

//            if (aKey == EStdKeyEnter)

//                {

//                fepMan->CommitInlineEditL();      

//          ptiengine->ClearCurrentWord();                

//          iLastKey = 0;

//                }

//            else            

//                {    

//                iLastKey = aKey;            

//                fepMan->SetFlag(CAknFepManager::EFlagInsideMultitapInlineEditingTransaction);                   

//                }

//            */

//                                  

//            ret = ETrue;

//            }

//        else

//            {

//            // text.Length is zero. Handle long key.

//            if( aKey == EStdKeyFullStop )

//                {

//                ptiengine->CancelTimerActivity();

//                }

//            }

//        }

    if( aKey!=EStdKeyBackspace && fnKeyState  != CAknFepFnKeyManager::EFnKeyNone)

    	return ETrue;

    if(ptiengine->IsValidKey((TPtiKey)aKey))

       	ret = ETrue;

#ifdef __REVERSE_FN_KEY_SUPPORTED

	if(languageChanged)

    	{

        ptiengine->ActivateLanguageL(origLanguage);

        ptiengine->SetInputMode(origInputMode );            		

        }    

#endif  

    return ret;

    }

// Functions from MPtiObserver interface

void TAknFepInputStateHalfQwerty::KeyTimerExpired()

    {

    if (iData)

        {

        MAknFepManagerUIInterface* fepMan = iOwner->FepMan();

        TRAP_IGNORE(fepMan->CommitInlineEditL())

        CPtiEngine* ptiengine = iOwner->PtiEngine();

        ptiengine->ClearCurrentWord();

        #ifdef __HALF_QWERTY_PREVIEW_PANE

        	fepMan->HidePane();

		#endif //__HALF_QWERTY_PREVIEW_PANE

        iData = 0;

        fepMan->ClearFlag(CAknFepManager::EFlagInsideMultitapInlineEditingTransaction);

        CAknFepFnKeyManager::TFnKeyState fnKeyState  = fepMan->FnKeyState();    

        if( !fepMan->IsFlagSet( CAknFepManager::EFlagLongShiftKeyPress ) )

            {

            if(fnKeyState == CAknFepFnKeyManager::EFnKeyNext)

                fepMan->SetFnKeyState(CAknFepFnKeyManager::EFnKeyNone);

            }

        }  

    }

void TAknFepInputStateHalfQwerty::HandleCaseChange(TInt /*aKey*/, TBool aIsCharacter)

    {

    // Punctuation key multitapping should not change case

    if( iData )

        return;

    TPtiTextCase caseMode = EPtiCaseLower;

    if (aIsCharacter)

        {

        if( iData == 0 || !( iOwner->FepMan()->IsOnlyNumericPermitted()  ) )

            {

            // use the Edwin case only when timer expires

            // To handle cases like insert fn character empty editor

            // followed by alpa character

            switch(iOwner->CaseMan()->CurrentCase())

               {

                case EAknEditorLowerCase:

                    caseMode = EPtiCaseLower;

                    break;            

                case EAknEditorTextCase:

                case EAknEditorUpperCase:

                   caseMode = EPtiCaseUpper;

               default:

                   break;

               }

            }

        else

            {

            // user is still multitapping, use the existing PtiEngine case

            caseMode = iOwner->PtiEngine()->Case();

            }

        }

    TPtiTextCase shiftedCase = caseMode;

    TPtiTextCase curCase = iOwner->PtiEngine()->Case();

    if(curCase == EPtiCaseFnUpper || curCase == EPtiCaseFnLower)

        return;

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

        ( !aIsCharacter|| iOwner->CaseMan()->IsAbleChangeCase() ) )

        {

        // Case mode is changed to opposite because shift key is/was pressed and

        // in case of character key case changes are allowed. In case of

        // number or special key, shift mode is used always when 

        // shift key is pressed

        // clear this flag so that the shift key mode gets reset 

        // when shift key up event is received

        iOwner->FepMan()->ClearFlag(CAknFepManager::EFlagNoActionDuringShiftKeyPress);

		// Do not toggle case while multitapping

        if( !iData )

        	{

        	switch ( caseMode )

	            {

	            case EPtiCaseUpper:

	                shiftedCase = EPtiCaseLower;

	                break;

	            case EPtiCaseLower:

	                shiftedCase = EPtiCaseUpper;

	                break;

	            default:

	                break;

	            }

        	}

        }

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

        {

        // Chr key is pressed down. Chr mode is used.

        if (shiftedCase == EPtiCaseLower)

            {

            shiftedCase = EPtiCaseChrLower;

            }

        else if (shiftedCase == EPtiCaseUpper)

            {

            shiftedCase = EPtiCaseChrUpper;

            }

        }

    iOwner->FepMan()->ClearFlag( CAknFepManager::EFlagNoActionDuringChrKeyPress );

    iOwner->PtiEngine()->SetCase(shiftedCase);

    }

TBool TAknFepInputStateHalfQwerty::IsCharacterKey(const TInt aKey)

    {

    CPtiEngine* ptiengine = iOwner->PtiEngine();       

    // Max length doesn't matter because we'll need only the first character.    

    TBuf<KMaxName> lowerdata;   

    ptiengine->MappingDataForKey((TPtiKey)aKey, lowerdata, EPtiCaseLower);        

    if (lowerdata.Length() > 0)

        {

        TChar lower = lowerdata[0];        

        TUint upper = lower.GetUpperCase();

        if ( TUint(lower) != upper )

            {

            return ETrue;   

            }

        }

     return EFalse;

    }       

TBool TAknFepInputStateHalfQwerty::TryGetValidCharForKey(const TInt& aKey, TChar& aChar)

    {    

    if( ! TryGetValidCharForKeyAndCase( aKey, aChar, EPtiCaseFnLower) )

        {

        if(! TryGetValidCharForKeyAndCase( aKey, aChar, EPtiCaseUpper))

            {