/*

* 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 TAknFepInputStateInitialIndicMultitap methods.

*

*/

#include "AknFepUIInputStateInitialIndicMultitap.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>

#define PTI_CLEAR_CURRENTWORD( A, B ) \

		( A )->ClearCurrentWord(); \

		( B ) = ETrue; \

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

// TAknFepInputStateInitialIndicMultitap::TAknFepInputStateInitialIndicMultitap

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

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

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

TAknFepInputStateInitialIndicMultitap::

TAknFepInputStateInitialIndicMultitap( MAknFepUIManagerStateInterface* aOwner,

																			TLanguage aLanguage )

																			:TAknFepInputStateInitialMultitapBase( aOwner )

    {

    CPtiEngine* ptiengine = iOwner->PtiEngine();

    iIsStarKeyPressed = EFalse;

    iIsKeyTimerExpired = ETrue;

    iIndicLanguage = aLanguage;

    iIsHalantAllowed = EFalse;

    iZWSPresent = EFalse;

    iRephaPresent = EFalse;

    iRakarPresent = EFalse;

    iResponseInsertZWS = EFalse;

    iLigaturePresent = EFalse;

#ifdef RD_MARATHI

	iPreviousCommittedChar 		= 0;

	iEyeLashRaPresent 	        = EFalse;

	iChandraAPresent 	        = EFalse;

#endif // RD_MARATHI

    TRAP_IGNORE( ptiengine->ActivateLanguageL( aLanguage ) )

    ptiengine->SetCase( EPtiCaseLower );

    }

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

// TAknFepInputStateInitialIndicMultitap::HandleKeyL

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

// of the inputed text and then enters it.

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

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

	{

	TBool                      result       	= ETrue;

	MAknFepManagerUIInterface* fepMan       	= iOwner->FepMan();

	CPtiEngine* 			   ptiengine 		= iOwner->PtiEngine();

#ifdef RD_MARATHI

	if( iIsKeyTimerExpired )

		{

		iPreviousCommittedChar = fepMan->PreviousChar( ETrue );

		if( iIndicLanguage == ELangMarathi )

			{

			HandleKeyMarathiL();

			}

		}

#endif // RD_MARATHI

	if(aKey == EPtiKey1)

		{

		iKey1Pressed = ETrue;	

		}

	else 

		{

		iKey1Pressed = EFalse;	

		}	

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

    	{

#ifdef RD_MARATHI

        iPreviousCommittedChar = fepMan->PreviousChar( ETrue );

        if( iPreviousCommittedChar == ZERO_WIDTH_SPACE &&

            aKey == EPtiKey2 )

            {

            // This is a scenario where the timer is forcefully

            // expired by quickly pressing a different key.

            // Should remove the ZWS from the editor.

            fepMan->RemovePreviousCharacterL();

            iZWSPresent = EFalse;

            // Reset the previous committed character.

            iPreviousCommittedChar = fepMan->PreviousChar( ETrue );

            }

		if( iIndicLanguage == ELangMarathi )

		    {

		    HandleKeyMarathiL();

		    }

#endif // RD_MARATHI

	    fepMan->CommitInlineEditL();

	    PTI_CLEAR_CURRENTWORD( ptiengine, iIsKeyTimerExpired )

	    if( iRephaPresent )

	    	{

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

	    	iRephaPresent = EFalse;

	    	}

	    if( iRakarPresent )

	    	{

	    	iRakarPresent = EFalse;

	    	}

#ifdef RD_MARATHI

        // This check should be done only after the text is committed.

	    if( iEyeLashRaPresent )

            {

            // Calls the overloaded method which used find doc pos.

            // Reason: Unlike Repha, EyeLash Ra can be inserted in

            // an empty editor. GetNextVisualCursorPosition would

            // result in incorrect cursor alignment in this case.

            fepMan->AlignLogicalAndVisualCursorL();

            iEyeLashRaPresent = EFalse;

            }

#endif

   		}

	if ( aLength == EShortKeyPress )

		{

	    if ( aKey == EPtiKeyStar ) // Overriding Key

            {

            iIsStarKeyPressed = ETrue;

            fepMan->RemoveZWSCharacterL( iKey1Pressed, EFalse, EFalse, iLigaturePresent );	

    		}

		else

			{

			TPtiTextCase newCase = ptiengine->Case();

			TIndicInputResponse keyResponse = 

				TAknFepUiIndicInputManager::ValidateInput( aKey,

														fepMan->PreviousChar( ETrue ),

														NULL,NULL,

														iIsHalantAllowed,

														iIsStarKeyPressed,

														iIsKeyTimerExpired,

														newCase,

														aLength,

														iIndicLanguage

#ifdef RD_MARATHI

														, EFalse, EFalse, iChandraAPresent

#endif // RD_MARATHI

														 );

			ptiengine->SetCase( newCase );

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

			if ( ptiText.Length() )

				{

				do

					{

					TText prChar;

					// For Repha, use the Previous to Previous character

					// only if multitap timer hasn't expired. This will

					// handle cases like Matra attached to the consonant.

					// Here, repha is not allowed and the character to 

					// to checked is Matra. In cases like a consonant with

					// Virama, all the characters should be skipped including

					// repha. In this this case the timer is set to expired.

					// So the previous character is Virama. And as per the 

					// language rules, repha is not allowed after Virama.

					if( TAknFepUiIndicInputManager::IsCharRepha( 

						ptiText[0], iIndicLanguage ) && !iIsKeyTimerExpired )

						{

						prChar = fepMan->PreviousToPreviousChar( ETrue );

#ifdef RD_MARATHI

                        prChar = iPreviousCommittedChar;

#endif // RD_MARATHI

						}

					else

						{

						prChar = fepMan->PreviousChar( ETrue );

						}

					// When a base consonant is already entered and the

					// user starts multitapping, the second modifier in the

					// key map will not be allowed if the previous character 

					// is considered. The base consonant has to be used

					// instead. This change had to be added after the new

					// function, IsModifierAllowed was added.

					if( TAknFepUiIndicInputManager::IsCharModifier(

						ptiText[0], iIndicLanguage ) && !iIsKeyTimerExpired )

						{

						prChar = fepMan->PreviousToPreviousChar( ETrue );

						}

					if( TAknFepUiIndicInputManager::IsCharLigature( 

						ptiText[0], iIndicLanguage ) && !iIsKeyTimerExpired )

						{

						if( fepMan->IsZWSCharacterPresent( ETrue ) )

							{

							iZWSPresent = ETrue;

							}

						iLigaturePresent = ETrue;

						prChar = fepMan->PreviousToPreviousChar( ETrue );

						}

					else

						{

						iLigaturePresent = EFalse;

						}

#ifdef RD_MARATHI

					// While multitapping after inserting a base consonant,

					// modifiers will get inserted first, followed by the

					// Nukta character. Hence, use Prev to prev char which 

					// will be a base consonant.

					if( TAknFepUiIndicInputManager::IsCharNukta(

						ptiText[0], iIndicLanguage ) && !iIsKeyTimerExpired )

						{

						prChar = fepMan->PreviousToPreviousChar( ETrue );

						}

#endif // RD_MARATHI

					keyResponse = 

						TAknFepUiIndicInputManager::ValidateInput( aKey,

        														prChar,

																ptiText[0],

        														NULL,

        														iIsHalantAllowed,

        														iIsStarKeyPressed,

																iIsKeyTimerExpired,

																newCase,

																aLength,

        														iIndicLanguage,

        														iRakarPresent,

        														iZWSPresent

#ifdef RD_MARATHI

										  						, iChandraAPresent 

#endif // RD_MARATHI

        														 );	

					if( !IsFreeSpaceAvailable( keyResponse ) )

						{

						keyResponse = EIndicInputResponseInvalid;

						}

					if( keyResponse == EIndicInputResponseInvalid )

						{

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

						}

					if( !ptiText.Length() )

						{

						break;

						}

					}while( keyResponse == EIndicInputResponseInvalid );

				if( iIsStarKeyPressed && 

					aKey == EPtiKey0 && 

					TAknFepUiIndicInputManager::IsCharOther( 

						ptiText[0], iIndicLanguage ) )

					{

					// Forcefully keep the star key flag to true. Else when

					// the ligatures are entered, this flag will be false 

					// thus preventing the ligature formation.

					iIsStarKeyPressed = ETrue;

					}

				else

					{

					iIsStarKeyPressed = EFalse;

					}

				result = HandleIndicKeyResponseL( aKey, keyResponse, ptiText );

				}

			}

		}

   	else

    	{

        /* Long press of a Key */

        if ( aKey == EPtiKeyStar )

	        {

            /* Launch the SCT For Indic */

   			if( fepMan->EditorHasFreeSpace() )

				{

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

        			{

	            	fepMan->LaunchSpecialCharacterTableL();	

	            	}

				}

		    }

        else

	        {

	        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;

    return( result );

	}

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

// TAknFepInputStateInitialIndicMultitap::KeyTimerExpired

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

// the inline editing text to the editor.

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

void TAknFepInputStateInitialIndicMultitap::KeyTimerExpired()

	{

	iIsKeyTimerExpired = ETrue;

	if( iRakarPresent )

		{

		iRakarPresent = EFalse;

		}

	if( iRephaPresent 

#ifdef RD_MARATHI

	|| ( iEyeLashRaPresent && 

			TAknFepUiIndicInputManager::

				IsCharBaseConsonant( iOwner->FepMan()->NextChar(), 

									iIndicLanguage ) )

#endif // RD_MARATHI

	    )

		{

		TRAP_IGNORE( iOwner->FepMan()->AlignLogicalAndVisualCursorL( TTmDocPosSpec::ELeading, EFalse ) )

		iRephaPresent = EFalse;

		}

#ifdef RD_MARATHI

		iEyeLashRaPresent = EFalse;

#endif // RD_MARATHI

	if( iResponseInsertZWS || iZWSPresent )

		{

		iZWSPresent = EFalse;

		iResponseInsertZWS = EFalse;

		TRAP_IGNORE( iOwner->FepMan()->RemoveZWSCharacterL( iKey1Pressed, EFalse, 

                                                        EFalse, iLigaturePresent ) )

		}

	iLigaturePresent = EFalse;

#ifdef RD_MARATHI

	iChandraAPresent = EFalse;

#endif // RD_MARATHI

	TAknFepInputStateInitialMultitapBase::KeyTimerExpired();

	}

TBool TAknFepInputStateInitialIndicMultitap::

    HandleIndicKeyResponseL( TInt aKey, TIndicInputResponse aKeyResponse, TPtrC aPtiText )

    {

    TBool result = ETrue;

    MAknFepManagerUIInterface* fepMan = iOwner->FepMan();

    switch( aKeyResponse )

        {

        case EIndicInputResponseNone:

        	{

        	if ( aPtiText.Length() && ( !iIsKeyTimerExpired || fepMan->EditorHasFreeSpace() ) )

        		{

            	if ( iIsKeyTimerExpired )

            		{

            		if ( iZWSPresent )

            			{

            			fepMan->RemoveZWSCharacterL( iKey1Pressed,EFalse, 

                        TAknFepUiIndicInputManager::IsCharModifier(aPtiText[0], iIndicLanguage));

            			iZWSPresent = EFalse;

            			}

            		fepMan->NewCharacterSequenceL( aPtiText, EIndicInputResponseNone );

            		if ( fepMan->IsZWSCharacterPresent() )

            			{

            			iZWSPresent = ETrue;

            			}

            		}

            	else

            		{

            		if ( aKey == EPtiKey1 )

            			{

            			if( iRephaPresent )

            				{

            				fepMan->RemoveRephaCharacterL();

            				iRephaPresent = EFalse;

            				}

            			if( iZWSPresent )

            				{						    				

            				fepMan->RemoveZWSCharacterL( iKey1Pressed, ETrue );

            				iZWSPresent = EFalse;

            				}

        				if( iRakarPresent )

            				{

            				// This is to handle the case when only

            				// two spaces are left in the editor.

            				fepMan->RemoveRakarCharacterL();

            				iRakarPresent = EFalse;

            				}

#ifdef RD_MARATHI

            			iEyeLashRaPresent = EFalse;

#endif // RD_MARATHI

            			}

            		else if( aKey == EPtiKey2 )

            			{

#ifdef RD_MARATHI

                        iChandraAPresent = EFalse;

#endif // RD_MARATHI

            			}

            		fepMan->NewCharacterSequenceL( aPtiText, EIndicInputResponseNone );

        			}

        		}

        	iIsKeyTimerExpired = EFalse;	

        	}

        	break;

        case EIndicInputResponseZWSandCharacter:

        	{

        	if( fepMan->EditorHasFreeSpace( 2 ) )

        		{

        		fepMan->NewCharacterSequenceL( aPtiText, EIndicInputResponseZWSandCharacter );

              	iZWSPresent = ETrue;

              	iIsKeyTimerExpired = EFalse;

        		}

        	}

        	break;

        case EIndicInputResponseInsertZWS: 

        	{

        	//Already in multitapping so we need to check wheather 

        	//there is additional single space for ZWS

        	if( !iIsKeyTimerExpired || fepMan->EditorHasFreeSpace( 1 ) ) 

        		{

                fepMan->NewCharacterSequenceL( aPtiText, EIndicInputResponseInsertZWS );

        		// Using a seperate flag here. Cannot use the flag

        		// iZWSPresent. Consider the scenario:- User enters 

        		// a consonant, then multitaps key-1 to insert halant.

        		// Now consider that we set the flag to ETrue.

        		// But before the key timer expires, key-5 is 

        		// multitapped to insert another consonant.

        		// In this case the code flow will go to the case

        		// EIndicInputResponseNone. Here the condition, 

        		// if ( iZWSPresent ) succeeds and ZWS is removed.

        		// This causes direct ligature formation. It should

        		// actually show the ligature formation after the timeout.

        		iResponseInsertZWS = ETrue;

        		}

        	else // Remove already entered Modifier "Visarga" if there is no space

        		{

        		fepMan->RemovePreviousCharacterL();	

        		}

        	iIsKeyTimerExpired = EFalse;		

        	}

        	break;

        case EIndicInputResponseInsertZWSandLigature:

        	{

        	if( fepMan->EditorHasFreeSpace( 3 )  )

        		{

        		if ( iIsKeyTimerExpired )

            		{

        			fepMan->RemoveZWSCharacterL( iKey1Pressed );

        			}

        		fepMan->NewCharacterSequenceL( aPtiText, EIndicInputResponseInsertZWSandLigature );

               	}

        	iIsKeyTimerExpired = EFalse;

        	iZWSPresent = ETrue;	

        	}

        	break;

        case EIndicInputResponseIgnore:	

        	break;

        case EIndicInputResponseInsertRepha:

        	{

        	if( !iIsKeyTimerExpired )

        		{

        		if( iRakarPresent )

        			{

        			fepMan->RemoveRakarCharacterL();

        			iRakarPresent = EFalse;

        			}

#ifdef RD_MARATHI

        		else if( iEyeLashRaPresent )

        			{