/*

* Copyright (c) 2002-2004 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 TAknFepInputStateInitialIndicPhoneticMultitap methods.

*

*/

#include "aknfepuiinputstateinitialindicphoneticmultitap.h"

#include "AknFepUIManagerStateInterface.h"      //MAknFepUIManagerStateInterface

#include "AknFepUIManagerWestern.h"

#include "AknFepUiIndicEnums.h"

#include "AknFepCaseManager.h"

#include "AknFepUiIndicInputManager.h"

#include <uikon.hrh>

#include <PtiEngine.h>

#include <PtiDefs.h>

#include <aknsctdialog.h>

#include <avkon.rsg>

#include <AknFep.rsg>

#include <EikEnv.h>

#include <Aknutils.h>

#define PHONETIC_SEPARATOR 0x2e

const TUint KSpaceChar = 0x0020;

const TUint KQuestionMark = 0x003F;

#define PTI_CLEAR_CURRENTWORD( A, B ) \

		( A )->ClearCurrentWord(); \

		( B ) = ETrue; \

const TText KAknFEPLineFeedSymbol = 0x21B2;

const TText KAknFEPMirroredLineFeedSymbol = 0x21B3;

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

// TAknFepInputStateInitialIndicPhoneticMultitap::TAknFepInputStateInitialIndicPhoneticMultitap

// C++ default constructor can NOT contain any code, that

// might leave or if it is absolutely necessary then MUST be trapped.

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

TAknFepInputStateInitialIndicPhoneticMultitap::

TAknFepInputStateInitialIndicPhoneticMultitap( MAknFepUIManagerStateInterface* aOwner,

																			TInt aLanguage )

																			:TAknFepInputStateInitialMultitapBase( aOwner )

    {

    CPtiEngine* ptiengine = iOwner->PtiEngine();

    iIsStarKeyPressed = EFalse;

    iIndicLanguage = TLanguage(aLanguage);

    iIndicPhoneticBuffer.Zero();

    TRAP_IGNORE( ptiengine->ActivateLanguageL(KLangHindiPhonetic,

                 EPtiEngineInputModeIndicPhoneticMultitap))

    ptiengine->SetCase( EPtiCaseLower );

    iPreviousCommittedChar = NULL;

    }

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

// TAknFepInputStateInitialIndicPhoneticMultitap::HandleKeyL

// Handles the logic of Indic multitap input. This function first checks the validity

// of the inputed text and then enters it.

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

TBool TAknFepInputStateInitialIndicPhoneticMultitap::HandleKeyL( TInt aKey, 

                                                                 TKeyPressLength aLength )

	{

	TBool                      result       	= ETrue;

	MAknFepManagerUIInterface* fepMan       	= iOwner->FepMan();

	CPtiEngine* 			   ptiengine 		= iOwner->PtiEngine();

	if(aKey == EKeyBackspace)

		{

		iIndicPhoneticBuffer.Zero();

		iPhoneticLatinChar = 0;	

    	iPreviousCommittedChar = 0;						

		}

	else if(fepMan->IsFlagSet(CAknFepManager::EFlagNoMatches) 

           && aKey != EPtiKey0 && aLength != ELongKeyPress)

		{

		//no matches, so just play tone

        fepMan->PlaySound(EAvkonSIDConfirmationTone);

		}

	else

		{

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

	    	{

	    	//iPrevCharacter = 

	    	TransliterateFromLatinL();

		    PTI_CLEAR_CURRENTWORD( ptiengine, iIsKeyTimerExpired )

		    // = ;

	   		}

		iIsStarKeyPressed = EFalse;

		if ( aLength == EShortKeyPress )

			{

		    if ( aKey == EPtiKeyStar ) // Overriding Key

	            {

		    	ptiengine->HandleCommandL(EPtiCommandBreakSyllable, NULL );	

		    	iIsStarKeyPressed = ETrue;

	    		}

			else

				{

				TPtrC ptiText = ptiengine->AppendKeyPress( ( TPtiKey )aKey );

				iPhoneticLatinChar = ptiText[0];

				if (IsToTransliterate(iPhoneticLatinChar) 

				&& (!fepMan->IsFlagSet(CAknFepManager::EFlagNoMatches)))

			    	{

			    	TBuf<CAknFepManager::EMaximumFepWordLength> buf;

		            buf.Copy(iIndicPhoneticBuffer);

		            buf.Append(ptiText);

					fepMan->NewCharacterSequenceL(buf,EIndicInputResponsePhoneticMultitapText);

			    	}

				else if(!IsToTransliterate(iPhoneticLatinChar))

					{

					TChar prevcharacter(fepMan->PreviousChar());

					if((fepMan->IsFlagSet(CAknFepManager::EFlagNoMatches)) && (KQuestionMark == prevcharacter))

						{

						fepMan->RemovePreviousCharacterL();		

						fepMan->ClearFlag(CAknFepManager::EFlagNoMatches);	

						ptiengine->HandleCommandL(EPtiCommandBreakSyllable, NULL );

						}

					iIndicPhoneticBuffer.Zero();

					if(IsToTransliterate(prevcharacter) && prevcharacter != '0')

						fepMan->CommitInlineEditL();	

					fepMan->NewCharacterSequenceL(ptiText,EIndicInputResponseNone);

					}

				}

			}

	   	else

	    	{

	    	if(fepMan->PreviousChar() == KQuestionMark)

				{

				fepMan->RemovePreviousCharacterL();		

				}

			fepMan->ClearFlag(CAknFepManager::EFlagNoMatches);

	        /* Long press of a Key */

	        if ( aKey == EPtiKeyStar)

		        {

	            /* Launch the SCT For Indic */

	   			if( fepMan->EditorHasFreeSpace() )

					{

					if (fepMan->IsAbleToLaunchSCT() && !fepMan->EditSubmenuInUse())

	        			{        			

		            	fepMan->LaunchSpecialCharacterTableL();	

		            	}

					}

			    }

	        else

		        {

		        //commit the inline text

		        fepMan->CommitInlineEditL();

		        //Remove one character, to remove the Latin character

		        //appended because of the short key press. This is 

		        //because long key press results  in short key press 

		        //and then long key press.

		        fepMan->RemovePreviousCharacterL();

		        //Reset the phonetic state in FEP. So, that any further 

		        //phonetic conversion will start from fresh.

		        iIndicPhoneticBuffer.SetLength(0);

		        iPhoneticLatinChar = 0;	

    	        iPreviousCommittedChar = 0;

		        ptiengine->HandleCommandL(EPtiCommandBreakSyllable, NULL );

		        TUint prevchar = fepMan->PreviousChar(ETrue);

	            if(!((aKey == EPtiKey1) && ((0x0031 == prevchar) || (0x0967 == prevchar)) ))

			        {

					TChar ch( aKey );

			        TBuf<1> buf;

			        buf.Append( ch );

			        fepMan->NewCharacterSequenceL( buf, EIndicInputResponseNumber );

					fepMan->CommitInlineEditL();			

					PTI_CLEAR_CURRENTWORD( ptiengine, iIsKeyTimerExpired )				

					}

		        }

	    	}

	    iData = aKey;

		}

   //hindi phonetic changes

   if(iPhoneticLatinChar.IsUpper())

	{

		fepMan->HandleIndicCaseL();

	}

    return( result );

	}

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

// TAknFepInputStateInitialIndicPhoneticMultitap::KeyTimerExpired

// Handles the logic of post keytimerexpired event. This function commits 

// the inline editing text to the editor.

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

void TAknFepInputStateInitialIndicPhoneticMultitap::KeyTimerExpired()

	{

	TRAP_IGNORE(HandleKeyTimerExpiryL())

	iData = 0;	

	iOwner->PtiEngine()->ClearCurrentWord();

	if((iPreviousCommittedChar = iOwner->FepMan()->PreviousChar()) == 0x002E)

		iPreviousCommittedChar = iOwner->FepMan()->PreviousToPreviousChar(ETrue);

	iIsKeyTimerExpired = ETrue;

	}

void TAknFepInputStateInitialIndicPhoneticMultitap::HandleKeyTimerExpiryL()

	{

	CPtiEngine* ptiengine = iOwner->PtiEngine();

	MAknFepManagerUIInterface* fepMan = iOwner->FepMan();	

	if ( !(fepMan->EditorHasFreeSpace() 

       || fepMan->IsFlagSet(CAknFepManager::EFlagInsideMultitapInlineEditingTransaction)))

	    {

	    return;

	    }

	if(iData && ( IsToTransliterate(iPhoneticLatinChar) &&  iData != EPtiKeyStar) 

     && !fepMan->IsFlagSet(CAknFepManager::EFlagNoMatches))

		{

		TransliterateFromLatinL();

		}

	else if ( !IsToTransliterate (iPhoneticLatinChar))

        {

		MPtiLanguage* ptilang = ptiengine->CurrentLanguage();

	    TInt languageCode = (ptilang)? ptilang->LanguageCode() : 0;

		// Space clears Explicite halant for North Indian Languages.

		if(IsToRemoveHalantForLanguage(languageCode))

			{

			RemoveHalantL(TLanguage(languageCode));

			}	

		ptiengine->HandleCommandL(EPtiCommandBreakSyllable, NULL );

		fepMan->CommitInlineEditL();

		iIndicPhoneticBuffer.Zero();

        }	

	else

		{

		iOwner->FepMan()->CommitInlineEditL();

    	iIndicPhoneticBuffer.Zero();

		}	

	}

void TAknFepInputStateInitialIndicPhoneticMultitap :: TransliterateFromLatinL() 

	{

	TPhoneticArg arg;

    TBuf<CAknFepManager::EMaximumFepWordLength> destinationbuf;

    destinationbuf.Zero();               

	TInt errorcode = 0; 

	CPtiEngine* ptiengine = iOwner->PtiEngine();

	MAknFepManagerUIInterface* fepMan = iOwner->FepMan();

	MPtiLanguage* ptilang = iOwner->PtiEngine()->CurrentLanguage();

    TInt languageCode = (ptilang)? ptilang->LanguageCode() : 0;

	arg.iChar = iPhoneticLatinChar;

	arg.iDest = & destinationbuf;

	errorcode = ptiengine->HandleCommandL(EPtiCommandGetPhoneticText,REINTERPRET_CAST( TAny*, &arg));

	AknTextUtils::LanguageSpecificNumberConversion(destinationbuf);

	switch(errorcode)

    	{

    	case KErrNone:

    		{

    		if(arg.iState == EIndicSyllableStateSyllableBroken)

    			{

				if(iIndicPhoneticBuffer.Length())

					{

					fepMan->CommitInlineEditL(iIndicPhoneticBuffer, iIndicPhoneticBuffer.Length());

					iPreviousCommittedChar = fepMan->PreviousChar(ETrue);

					iIndicPhoneticBuffer.Zero();

					}

      			}

			if (destinationbuf.Length())

	            {

	            	if(! ValidatePhoneticInputL(destinationbuf, TLanguage(languageCode)))

	            		{

	            		break;	

	            		}

	            fepMan->NewCharacterSequenceL(destinationbuf,

	                                          EIndicInputResponsePhoneticMultitapText);

        		if(TAknFepUiIndicInputManager::IsCharOther(destinationbuf[0],

        		     TLanguage(languageCode)) && 0x002E != destinationbuf[0])

        			{

        			fepMan->CommitInlineEditL();

        			iIndicPhoneticBuffer.Zero();

        			}

				else

					{

        			iIndicPhoneticBuffer.Copy(destinationbuf);

					}

	            }

    		}

    	break;

    	case KErrOverflow:

    		{

			fepMan->NewCharacterSequenceL(destinationbuf,EIndicInputResponsePhoneticMultitapText);    		

    		fepMan->CommitInlineEditL();

        	ptiengine->HandleCommandL(EPtiCommandClearPhoneticBuffer,NULL);

    		}

    	break;

    	default:

    	break;

    	}

    iPhoneticLatinChar = 0;	

	}

TBool TAknFepInputStateInitialIndicPhoneticMultitap::IsToRemoveHalantForLanguage(TInt aLanguage)

	{

	TBool ret = EFalse;

	switch(aLanguage)

		{

		case KLangHindiPhonetic:

			ret = ETrue;

		break;

		}

	return ret;	

	}

inline TBool TAknFepInputStateInitialIndicPhoneticMultitap::IsToTransliterate(TChar& aChar)

	{

	return !(KAknFEPLineFeedSymbol == aChar || KSpaceChar == aChar);

	}

TBool TAknFepInputStateInitialIndicPhoneticMultitap::ValidatePhoneticInputL(const TDes& aBuf, 

                                                                            TLanguage aLanguage)

	{

	TBool ret = ETrue;

    TUint curChar = 0;

    TUint prevChar=0;

    TUint len=aBuf.Length();

    TPtr buffer(const_cast<TText*>( aBuf.Ptr() ),len,len);

	MAknFepManagerUIInterface* fepMan = iOwner->FepMan();

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

	if(! iPreviousCommittedChar)

		{

		iPreviousCommittedChar = fepMan->PreviousChar(ETrue);	

		}

       while(len)

                {

                if(buffer[len-1] == 0x94d)

                    {

                    len--;

                    buffer.SetLength(len);

                    continue;

                    }

                else if(!curChar)

                    {

                    curChar = buffer[len-1] ;

                    len--;

                    }

                else if(!prevChar)

                    {

                    prevChar = buffer[len-1] ;

                    len--;

                    }

                else

                    break;

                }

       if(!prevChar)

            prevChar = iPreviousCommittedChar;

       /*

       Multitap does not allow any fall back characters. The phonetic engine does not

       check for the fallback characters and FEP has to do it.

       */

       //fallback character if Nukta is entered after Nukta

       if((TAknFepUiIndicInputManager::IsCharNukta(prevChar,aLanguage) && 

        TAknFepUiIndicInputManager::IsCharNukta(curChar,aLanguage)) ||

        //fallback character if Nukta is entered after Modifier or

        //Modifier is entered after Modifier

        (TAknFepUiIndicInputManager::IsCharModifier(prevChar,aLanguage) && 

        (TAknFepUiIndicInputManager::IsCharNukta(curChar,aLanguage) ||

        TAknFepUiIndicInputManager::IsCharModifier(curChar,aLanguage))) ||

        //fallback character if Nukta is entered after Vowel or

        //Nukta is entered after matra

       ((TAknFepUiIndicInputManager::IsCharAnVowel(prevChar,aLanguage) ||

       TAknFepUiIndicInputManager::IsCharMatra(prevChar,aLanguage)) && 

        TAknFepUiIndicInputManager::IsCharNukta(curChar,aLanguage))  ||

        //fallback character if Nukta is entered after Nukta Consonant

        (TAknFepUiIndicInputManager::IsCharNuktaConsonant(prevChar,aLanguage) &&

        TAknFepUiIndicInputManager::IsCharNukta(curChar,aLanguage)) ||

        //fallback character if Nukta entered in an empty editor

        (prevChar == PHONETIC_SEPARATOR &&

        TAknFepUiIndicInputManager::IsCharNukta(curChar,aLanguage))

        )

           {

            TBuf<1> buffer;

            fepMan->CommitInlineEditL(iIndicPhoneticBuffer, iIndicPhoneticBuffer.Length());

	        buffer.Append(KQuestionMark);

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

			{

			fepMan->StartInlineEditL();	

			}

        fepMan->UpdateInlineEditL(buffer,CAknFepManager::ESingleCharacter);

        fepMan->SetFlag(CAknFepManager::EFlagNoMatches);

		ret = EFalse;

		}

	return ret;

	}

TBool TAknFepInputStateInitialIndicPhoneticMultitap::IsInvalidPhoneticCharacter( 

                                              TUint aChar, TLanguage aLanguage )

	{

	TBool ret = EFalse;

	if(TAknFepUiIndicInputManager::IsCharNukta( aChar, aLanguage )

	   || TAknFepUiIndicInputManager::IsCharMatra( aChar,  aLanguage )

	   || TAknFepUiIndicInputManager::IsCharModifier( aChar,  aLanguage )

	   || TAknFepUiIndicInputManager::IsCharVirama( aChar,  aLanguage ))

		{	

		ret = ETrue;

		}

	return ret;	

	}

void TAknFepInputStateInitialIndicPhoneticMultitap::RemoveHalantL(TLanguage aLanguage)

	{

	MAknFepManagerUIInterface* fepMan = iOwner->FepMan();

	TBool isLineFeedEntered = fepMan->IsFlagSet(CAknFepManager::EFlagLineFeedCharacter);

	if (fepMan->IsFlagSet(CAknFepManager::EFlagInsideInlineEditingTransaction))

        {

        fepMan->CommitInlineEditL();

        }

	TInt position = 0;

    if(TAknFepUiIndicInputManager::IsCharVirama(fepMan->PreviousChar(ETrue), aLanguage))

    	{

    	position = 1;

    	}

    else if(!isLineFeedEntered && 

    TAknFepUiIndicInputManager::IsCharVirama(fepMan->PreviousToPreviousChar(ETrue), aLanguage))

    	{

    	position = 2;	

    	}

    if(position)	

    	fepMan->RemoveTextFromEditorL( 1, position-1, EFalse );

   	if(fepMan->NextChar() == KSpaceChar)

   		{

   		fepMan->AlignLogicalAndVisualCursorL(TTmDocPosSpec::ELeading, EFalse);	

   		}

	}

void TAknFepInputStateInitialIndicPhoneticMultitap::GetPhoneticLatinChar(TChar& aChar)const

	{

		aChar = iPhoneticLatinChar;

	}

//End of File