/*

* 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 TAknFepUiInputStateEntryHalfQwertyWesternPredictive methods.

*

*/

#include "AknFepUiInputStateEntryHalfQwertyWesternPredictive.h"

#include "AknFepUIManagerStateInterface.h"      //MAknFepUIManagerStateInterface

#include "AknFepManagerUIInterface.h"           //MAknFepManagerUIInterface

#include "AknFepUiManagerWestern.h"

#include "AknFepManager.h"

#include "AknFepPanic.h"

#include "AknFepCaseManager.h"

#include <PtiEngine.h>              //CPtiEngine

#include <PtiDefs.h>                //keys

#include <PtiCompositionDataIF.h>   //MPtiEngineCompositionDataInterface

#include <featmgr.h>                //FeatureManager

#include <e32keys.h>

#include <aknfep.rsg>

#include <PtiUserDicEntry.h>

// TODO: Remove this include

#include <AvkonInternalCRKeys.h>

#include <AknUtils.h>

static const TInt KKeyMappingsLength = 63;

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

//

TAknFepUiInputStateEntryHalfQwertyWesternPredictive::TAknFepUiInputStateEntryHalfQwertyWesternPredictive(MAknFepUIManagerStateInterface* aOwner)

    :TAknFepInputStateBase(aOwner)

    {

    //this class insists on the existence of a case manager

    __ASSERT_DEBUG(iOwner->CaseMan(), AknFepPanic(EAknFepPanicNoCaseManager));

    iState = EEntry;

    CPtiEngine* ptiengine = iOwner->PtiEngine();

    ptiengine->SetInputMode( EPtiEngineHalfQwertyPredictive );

    MAknFepManagerUIInterface* fepMan = iOwner->FepMan();

    TPtiTextCase caseMode = ptiengine->Case();

    ptiengine->SetCase(caseMode);

    TBool isUnlimitedEditor = EFalse;

    ptiengine->SetMaxLengthForAutoCompletedCandidates(fepMan->EditorFreeSpaceForAutoWordCompletion(isUnlimitedEditor ));

	if(fepMan->IsAutoCompleteOn())

	    {

	    TRAP_IGNORE( ptiengine->HandleCommandL( EPtiCommandEnableAutoCompletion ) );

	    }

	else

	    {

	    TRAP_IGNORE( ptiengine->HandleCommandL( EPtiCommandDisableAutoCompletion ) );

	    }

//	TPtiErrorCorrectionLevel correctionLevel = (TPtiErrorCorrectionLevel)fepMan->AdvancedPredictiveTypingCorrectionLevel();

//	TRAP_IGNORE( ptiengine->HandleCommandL( EPtiCommandSetCorrectionLevel, &correctionLevel ) );	

	TPtiKeyboardType keyboard = fepMan->KeyboardLayout();

	ptiengine->SetKeyboardType(keyboard);

//	TBool isNumberCandidateShown = fepMan->IsAdvancedPredictiveNumberCandidateShown();

//	TRAP_IGNORE( ptiengine->HandleCommandL( EPtiCommandSetNumberCandidateStatus, &isNumberCandidateShown ) );

//	

//	TBool primaryCandidateState = fepMan->AdvancedPredictivePrimaryCandidate();

//	TRAP_IGNORE( ptiengine->HandleCommandL( EPtiCommandSetProactiveCorrection, &primaryCandidateState ) );

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

//

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

    {

    MAknFepManagerUIInterface* fepMan = iOwner->FepMan();

    CPtiEngine* ptiengine = iOwner->PtiEngine();

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

	if(fnKeyState  != CAknFepFnKeyManager::EFnKeyNone)

		{

		ptiengine->SetCase(EPtiCaseFnLower);

		}

    // Handle the Chr cycling

    if ( fepMan->IsFlagSet(CAknFepManager::EFlagQwertyChrKeyDepressed) && aKey !=EKeyBackspace)

        {

        // if the key has no accented characters mapped to it, then just block the event

		TBuf<KKeyMappingsLength> keyMappings; 

    	ptiengine->MappingDataForKey( (TPtiKey)aKey, keyMappings, EPtiCaseChrLower );   

		if( keyMappings.Length() == 0 )       	

        	{

        	return EFalse;

        	}

       // if there is a no matches indicator remove it 

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

             {

             fepMan->TryRemoveNoMatchesIndicatorL();

             fepMan->UpdateCbaL(NULL);

             }	

        // if there is an autocompletion part rip it off

        fepMan->RemoveSuggestedAdvanceCompletionL();			        

        // now if the editor has no free space just return

        if ( !fepMan->EditorHasFreeSpace() )

            {

            return EFalse;

            }

        // if we are in inline editing, break the word

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

			{                        

			TPtrC selectedWord = ptiengine->CurrentWord();

        	if( ptiengine->CurrentWord() != KNullDesC)

        		{

            	fepMan->UpdateInlineEditL( selectedWord, selectedWord.Length() );  //selection.iAnchorPosition

        		ptiengine->CommitCurrentWord();	

            	}

        	fepMan->TryCloseUiL(); 

			}

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

            {

            // Chr key is still pressed down but character key was changed from previous one

            // to new one. The previous character is committed and PtiEngine starts 

            // processing new key.

            ptiengine->CancelTimerActivity();            

            }

        fepMan->SetFlag( CAknFepManager::EFlagInsideMultitapInlineEditingTransaction );

        }

    TBool response = EFalse;

    // Handle dead keys with space or backspace. These keys are not mapped in PtiEngine, so they cannot

    // be handled there.

/*    if ( ptiengine->HandleCommandL(EPtiCommandDeadKeyWaiting) == 1 )

        {

        if ( aKey == EStdKeyBackspace )

            {

            // Pending dead key is removed with backspace. No other characters are removed.

            ptiengine->HandleCommandL(EPtiCommandGetAndClearDeadKeyRootChar);

            response = ETrue;

            }

        else if ( aKey == EStdKeySpace )

            {

            // Dead key followed by space enters the dead key root character

            TText deadRoot = ptiengine->HandleCommandL(EPtiCommandGetAndClearDeadKeyRootChar);

            ptiengine->HandleCommandL( EPtiCommandAppendCharacter, &deadRoot );

            TPtrC newText = ptiengine->CurrentWord();

            fepMan->UpdateInlineEditL( newText, newText.Length() );

            iOwner->CaseMan()->UpdateCase(ENullNaviEvent);

            response = ETrue;

            }

        }		    

*/

    if (!response) // key not yet handled

        {

        switch (aKey)

            {

            case EStdKeySpace: 

            	if( fepMan->FnKeyState() 

            				== CAknFepFnKeyManager::EFnKeyNone )

            		{

            		response = HandleWordBreakingKeysL(aKey);            		

            		}

            	else

            		{

            		response = HandleQwertyKeysL( aKey, aLength);

            		}	

            	break;

            case EStdKeyFullStop:

            	if( aLength == ELongKeyPress )

            		{

            		// first commit the word if in inline editing

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

						{ 

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

							{

							fepMan->TryRemoveNoMatchesIndicatorL();

							fepMan->UpdateCbaL(NULL);

							}

						TPtrC selectedWord = ptiengine->CurrentWord();

			        	if( ptiengine->CurrentWord() != KNullDesC)

			        		{

			            	fepMan->UpdateInlineEditL( selectedWord, selectedWord.Length() );  //selection.iAnchorPosition			            	

                            ptiengine->CommitCurrentWord();

			            	}

			        	fepMan->TryCloseUiL(); 

						}

            		response = EFalse;            		

            		}

            	else

            		{

            		HandleShiftState(aKey);

            		response = HandleQwertyKeysL( aKey, aLength);

            		}	

            	break;

            case EStdKeyEnter:

            case EStdKeyTab:

            case EStdKeyLeftArrow:

            case EStdKeyRightArrow:

            case EStdKeyUpArrow:

            case EStdKeyDownArrow:

                response = HandleWordBreakingKeysL(aKey);

                break;

            // Long press of shift key start copy event.     

            // Its should handle by framework.    

            case EStdKeyF21:

            case EKeyF21:

            // Soft key handle by framework

            // Selection key handle by AknFepManager.

            case EStdKeyDevice0: // iCode:EKeyCBA1

            case EStdKeyDevice1: //	iCode:EKeyCBA2

            case EStdKeyDevice3: // iCode:EKeyOK

            case EKeyCBA1:

            case EKeyCBA2:

            case EKeyOK:

            	response = EFalse;

            	break;

            case EKeyUpArrow: 

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

                    {

                    // Select the exact match with the up arrow and lock it.

                    // Another alternative could be to call function DoPreviousMatchL() from here

                    TPtrC exactWord = ptiengine->FirstCandidate();

                    ptiengine->HandleCommandL( EPtiCommandLockCurrentCandidate, NULL );

                    fepMan->UpdateInlineEditL(exactWord, exactWord.Length());

                    response = ETrue;

                    break;

                    }

                    // fall through

            case EKeyDownArrow:

            case EKeyLeftArrow:

            case EKeyRightArrow:

            case EKeyBackspace:

            	{

                response = HandleNaviKeysL(aKey, aLength);

            	}

                break;

            case EStdKeyLeftShift:

            case EStdKeyRightShift:

            case EStdKeyLeftFunc:

                {

                if( EPtiCaseFnLower == fepMan->PtiEngine()->Case() )

                    {

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

                        {

                        fepMan->TryRemoveNoMatchesIndicatorL();

                        }

                    fepMan->UpdateCbaL(NULL);

                    /*if (fepMan->IsFlagSet(CAknFepManager::EFlagCompoundWord))

                        { 

                        if (fepMan->IsCursorAtEndOfWord())

                            {

                            fepMan->AddCompoundWordToUdbL();                

                            }

                        fepMan->ClearFlag(CAknFepManager::EFlagCompoundWord);

                        }

                        */

                    fepMan->RemoveSuggestedAdvanceCompletionL();

                    ptiengine->CommitCurrentWord();

                    fepMan->CommitInlineEditL();

                    fepMan->TryCloseUiL();

                    response = EFalse;

                    }

                }

                break;

            default:

                HandleShiftState(aKey);

                response = HandleQwertyKeysL(aKey, aLength);

#ifdef __ITI_LONGPRESS_NUM_SHIFT_COPYPASTE__

                if ( aLength == ELongKeyPress )

                    {

                    // Expire multitap timer after long press. 

                    ptiengine->CancelTimerActivity();

                    }

#endif // __ITI_LONGPRESS_NUM_SHIFT_COPYPASTE__

                break;

            }

        }

    if ( aKey == EStdKeyEnter)

        {

        iData = 0;

        return 0;

        }

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

        {     

        iData = 0;

        fepMan->ClearFlag(CAknFepManager::EFlagInsideMultitapInlineEditingTransaction);        

        fepMan->PtiEngine()->CancelTimerActivity();

        return response;

        }

    iData = aKey; // store the pressed key for future reference

    return response;

    }

//////////////////////////////////////////////////////////////////////////////////

//

void TAknFepUiInputStateEntryHalfQwertyWesternPredictive::HandleShiftState( TInt aKey )

    {

    MAknFepManagerUIInterface* fepMan = iOwner->FepMan();

    CPtiEngine* ptiengine = iOwner->PtiEngine();

    CAknFepCaseManager* caseMan = iOwner->CaseMan();

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

    TPtiTextCase shiftedCase;

    if(fnKeyState  != CAknFepFnKeyManager::EFnKeyNone)

		{

		shiftedCase = EPtiCaseFnLower;

		}

	else

 		{

 		shiftedCase= EPtiCaseLower;	

 		}

    // Find out if the key is alphabetic

    TBuf<KKeyMappingsLength> keyMappings; 

    ptiengine->MappingDataForKey( (TPtiKey)aKey, keyMappings, EPtiCaseUpper );   

    TBool isAlpha = ( keyMappings.Length() && TChar(keyMappings[0]).IsAlpha() );

    if (isAlpha && (fnKeyState  == CAknFepFnKeyManager::EFnKeyNone))

        {

        switch ( caseMan->CurrentCase() )

            {

            case EAknEditorTextCase:

                {

                // Alphabetic characters are always capitalized in "Abc" mode 

                // unless the shift is pressed

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

                    {

                    shiftedCase = EPtiCaseUpper;

                    }          

                }

            break;

            case EAknEditorLowerCase:

                {

                // Pressing shift enters uppercae letters in the "abc" mode

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

                    {

                    shiftedCase = EPtiCaseUpper;

                    }                

                }

            break;

            case EAknEditorUpperCase:

                {

                // In the "ABC" mode (capslock mode) the letters are uppercased

                // unless the shift is pressed

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

                    {

                    shiftedCase = EPtiCaseUpper;

                    }                

                }

            break;

            default:

            break;

            }

        }

    else

        {

        // non-alphabetic keys are shifted if and only if shift is pressed, no matter what is the input state

        if ( fepMan->IsFlagSet(CAknFepManager::EFlagQwertyShiftMode) && (fnKeyState  == CAknFepFnKeyManager::EFnKeyNone))

            {

            shiftedCase = EPtiCaseUpper;

            }

        else if ( fepMan->IsFlagSet(CAknFepManager::EFlagQwertyShiftMode) && (fnKeyState  != CAknFepFnKeyManager::EFnKeyNone))

	        {

			shiftedCase = EPtiCaseFnUpper;

	        }    

        }

    // Handle the Chr key state

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

        {

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

        if (shiftedCase == EPtiCaseLower)

            {

            shiftedCase = EPtiCaseChrLower;

            }

        else if (shiftedCase == EPtiCaseUpper)

            {

            shiftedCase = EPtiCaseChrUpper;

            }

        }

    ptiengine->SetCase(shiftedCase);

    fepMan->ClearFlag(CAknFepManager::EFlagNoActionDuringShiftKeyPress);

    }

//////////////////////////////////////////////////////////////////////////////////

//

TBool TAknFepUiInputStateEntryHalfQwertyWesternPredictive::HandleWordBreakingKeysL(TInt aKey)

    {

    TBool retVal = EFalse; // in most cases we let also the upper levels handle these key events

    MAknFepManagerUIInterface* fepMan = iOwner->FepMan();

    CPtiEngine* ptiengine = iOwner->PtiEngine();

    // Up and down arrows break the inline word input only when shift or chr is held down

    if ( !fepMan->IsFlagSet(CAknFepManager::EFlagQwertyChrKeyDepressed) &&

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

         ( aKey==EStdKeyUpArrow || aKey==EStdKeyDownArrow ) )

        {

        return retVal;    

        }

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

        {

        TBool rightToLeftLang = fepMan->IsRightToLeftLanguage();

        TInt tailLength = 0;

	    ptiengine->HandleCommandL( EPtiCommandGetAutoCompletionTailLength, &tailLength );

        switch (aKey)

            {

            case EStdKeyLeftArrow:

            case EStdKeyRightArrow:    

            	// In case the inline editing is ongoing and there is a word completion

                // currently shown, the first backwards tap will remove the suggested 

                // completion. 

                if(tailLength > 0)

	                {

	                if ((rightToLeftLang && aKey == EStdKeyLeftArrow) 

	                	|| (! rightToLeftLang && aKey == EStdKeyRightArrow ))

	                    {

					    ptiengine->HandleCommandL( EPtiCommandLockCurrentCandidate);

					    TPtrC selectedWord = ptiengine->CurrentWord();

                        fepMan->UpdateInlineEditL( selectedWord, selectedWord.Length() );  //selection.iAnchorPosition

                        // To fix  Suggested word is not committed when Arrow right key is pressed.

                        ptiengine->CommitCurrentWord();

                        fepMan->TryCloseUiL();

                        // Asyncronous case update after the editor has handled the key

                		fepMan->SimulateKeyEventL(EKeyF19); 

	                    retVal = ETrue;

	                    }

	                else if((rightToLeftLang && aKey == EStdKeyRightArrow) 

	                	|| (! rightToLeftLang && aKey == EStdKeyLeftArrow )) 

		                {

	                    fepMan->RemoveSuggestedAdvanceCompletionL();

	                    retVal = ETrue;

		                }    	

	                }

                else

	                {

	                ptiengine->CommitCurrentWord();

	                retVal = EFalse;

	                }

            	break;

            case EStdKeyUpArrow:

            case EStdKeyDownArrow:

            case EStdKeyEnter:

            case EStdKeySpace:

            case EStdKeyTab:

            {

            	//retVal = ETrue;

				if ( ( aKey == EStdKeySpace || aKey == EStdKeyEnter ||aKey == EStdKeyTab)

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

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

		            {

		            fepMan->TryRemoveNoMatchesIndicatorL();

		            fepMan->UpdateCbaL(NULL);

		            }

            	TBool wasInlineEditing = EFalse;	

            	wasInlineEditing = fepMan->IsFlagSet(CAknFepManager::EFlagInsideInlineEditingTransaction);            	

                ptiengine->CommitCurrentWord();

                fepMan->CommitInlineEditL();

                /* Temporary Fix */

                //EFlagInsideInlineEditingTransaction flag check is not required

                //but just to make sure.

                if(aKey == EStdKeySpace && wasInlineEditing)

                	{

                	_LIT(KSpace," ");                

	                fepMan->StartInlineEditL();

	                fepMan->UpdateInlineEditL(KSpace,0);

	                fepMan->CommitInlineEditL();

                	retVal = ETrue;

                	}                

                /* Temporary Fix */