/*

* Copyright (c) 2005-2007 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:  Phonebook2 contact editor dialog.

*

*/

// INCLUDE FILES

#include "CPbk2AdaptiveSearchGridFiller.h"

#include "MVPbkViewContact.h"

#include "MVPbkContactViewBase.h"

#include "MPbk2ContactNameFormatter.h"

#include <FindUtil.h>

#include <badesca.h>

const TInt KMaxAdaptiveGridCacheCount = 10;

const TInt KAdaptiveSearchKeyMapGranularity = 100;

const TInt KAdaptiveSearchRefineStep = 10;

NONSHARABLE_CLASS(CPbk2AdaptiveGrid) : public CBase

	{

	HBufC* iFindText;

	HBufC* iKeyMap;

	public:

		CPbk2AdaptiveGrid()

			{

			}

		~CPbk2AdaptiveGrid()

			{

			delete iFindText;

			delete iKeyMap;

			}

		void SetKeyMapL( const TDesC& aFindText, const TDesC& aKeyMap )

			{

			delete iFindText;

			delete iKeyMap;

			iFindText = iKeyMap = NULL;

			iFindText = aFindText.AllocL();

			iKeyMap = aKeyMap.AllocL();

			}

		const TDesC& FindText() const

			{

			return *iFindText;

			}

		const TDesC& KeyMap() const

			{

			return *iKeyMap;

			}

	};

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

// CPbk2ContactEditorDlg::CPbk2ContactEditorDlg

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

//

CPbk2AdaptiveSearchGridFiller::CPbk2AdaptiveSearchGridFiller( CAknSearchField& aField, MPbk2ContactNameFormatter& aNameFormatter )

	: CActive( CActive::EPriorityIdle ), iSearchField( aField ), iNameFormatter( aNameFormatter ),

	iInvalidateAdaptiveSearchGrid( EFalse ),iSetFocusToSearchGrid( ETrue )

    {

	CActiveScheduler::Add( this );

    }

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

// CPbk2ContactEditorDlg::~CPbk2ContactEditorDlg

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

//

CPbk2AdaptiveSearchGridFiller::~CPbk2AdaptiveSearchGridFiller()

    {

    Cancel();

	delete iKeyMap;

	delete iCurrentGrid;

	iAdaptiveGridCache.ResetAndDestroy();

	delete iSearchString;

	delete iFindUtil;

	iDigraphContactsTitleArray.ResetAndDestroy();

    }

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

// CPbk2ContactEditorDlg::NewL

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

//

CPbk2AdaptiveSearchGridFiller* CPbk2AdaptiveSearchGridFiller::NewL(  CAknSearchField& aField, MPbk2ContactNameFormatter& aNameFormatter )

    {

    CPbk2AdaptiveSearchGridFiller* self =

        new(ELeave) CPbk2AdaptiveSearchGridFiller( aField, aNameFormatter );

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

    }

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

// CPbk2ContactEditorDlg::ConstructL

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

//

void CPbk2AdaptiveSearchGridFiller::ConstructL()

    {

	iKeyMap = HBufC::NewL( KAdaptiveSearchKeyMapGranularity );

	iFindUtil = CFindUtil::NewL();

    }

void CPbk2AdaptiveSearchGridFiller::StartFilling( const MVPbkContactViewBase& aView, const TDesC& aSearchString )

	{

	CPbk2AdaptiveGrid* keyMap = KeyMapFromCache( aSearchString );

	if( keyMap )

		{

		iSearchField.SetAdaptiveGridChars( keyMap->KeyMap() );

		return;

		}

	delete iSearchString;

	iSearchString = NULL;

	iSearchString = aSearchString.AllocL();

	// If there is no search word, the user is not searching any contacts

	// so we should reset the array to prepare for the next searching.

    if ( iSearchString->Length()== 0 )

    	{

    	iDigraphContactsTitleArray.ResetAndDestroy();

    	}

	iView = &aView;

	iKeyMap->Des().Zero();

	iCounter = 0;

	SetActive();

	TRequestStatus* status = &iStatus;

	User::RequestComplete( status, KErrNone );

	}

void CPbk2AdaptiveSearchGridFiller::StopFilling()

	{

	Cancel();

	iView = NULL;

	}

void CPbk2AdaptiveSearchGridFiller::RunL()

	{

	if( !iView )

		{

		return;

		}

	TInt stopCount = iCounter + KAdaptiveSearchRefineStep;

	const TInt itemCount = iView->ContactCountL();

	TInt maxSpacesNumber = 0;

	if( stopCount > itemCount )

		{

		stopCount = itemCount;

		}

	for( ; iCounter < stopCount; iCounter++ )

		{

		const MVPbkViewContact& contact = iView->ContactAtL( iCounter );

		const TInt titleLength = iNameFormatter.MaxTitleLength( contact.Fields(), KContactFormattingFlags );

		// check number of spaces in the contact title

		if ( numberOfSpaces > maxSpacesNumber )

		    {

		    maxSpacesNumber = numberOfSpaces;

		    }

		// Check if the contact's title include drgraphs,

		// if it is, add it to array to save.

			{			

			iDigraphContactsTitleArray.AppendL( title );

			CleanupStack::Pop(); //title

			}

		else

			{

			CleanupStack::PopAndDestroy(); //title

			}

		}

	// If there are titles in array, we should add them to build grids again,

	// because the contacts include drgraphs will be filtered 

	// when the application builds grids again.

    if ( iDigraphContactsTitleArray.Count()!= 0 )

    	{

    	for( TInt i(0); i < iDigraphContactsTitleArray.Count() ; i++ )

    		{

    		TPtr ptrContactsTitle = iDigraphContactsTitleArray[i]->Des();

        	BuildGridL( ptrContactsTitle, *iSearchString, iKeyMap );

    		}

		}

	if( stopCount == itemCount )

		{

		SetAdaptiveGridCharsL( maxSpacesNumber );

		AddKeyMapToCacheL( *iSearchString, *iKeyMap );

		}

	else

		{

		//else continue

		SetActive();

		TRequestStatus* status = &iStatus;

		User::RequestComplete( status, KErrNone );

		}

	}

void CPbk2AdaptiveSearchGridFiller::DoCancel()

	{

	iView = NULL;

	}

TInt CPbk2AdaptiveSearchGridFiller::RunError( TInt /*aError*/ )

	{

	//ignore errors, nothing critical has happened, lets forget it

	return KErrNone;

	}

CPbk2AdaptiveGrid* CPbk2AdaptiveSearchGridFiller::KeyMapFromCache( const TDesC& aFindText )

	{

	const TInt count = iAdaptiveGridCache.Count();

	for( TInt i( 0 ); i < count; i++ )

		{

		if( !aFindText.Compare( iAdaptiveGridCache[i]->FindText() ) )

			{

			return iAdaptiveGridCache[i];

			}

		}

	return NULL;

	}

void CPbk2AdaptiveSearchGridFiller::AddKeyMapToCacheL( const TDesC& aFindText, const TDesC& aKeyMap )

	{

	CPbk2AdaptiveGrid* keyMap = new( ELeave )CPbk2AdaptiveGrid;

	CleanupStack::PushL( keyMap );

	keyMap->SetKeyMapL( aFindText, aKeyMap );

	iAdaptiveGridCache.InsertL( keyMap, 0 );

	CleanupStack::Pop();//keyMap

	if( iAdaptiveGridCache.Count() > KMaxAdaptiveGridCacheCount )

		{

		delete iAdaptiveGridCache[0];

		iAdaptiveGridCache.Remove( 0 );

		}

	}

void CPbk2AdaptiveSearchGridFiller::ClearCache()

	{

	iAdaptiveGridCache.ResetAndDestroy();

	if ( iCurrentGrid )

	    {

        delete iCurrentGrid;

        iCurrentGrid = NULL;

	    }

	}

void CPbk2AdaptiveSearchGridFiller::InvalidateAdaptiveSearchGrid()

	{

	iInvalidateAdaptiveSearchGrid = ETrue;

	}

void CPbk2AdaptiveSearchGridFiller::SetFocusToAdaptiveSearchGrid()

    {

    iSetFocusToSearchGrid = ETrue;

    }

void CPbk2AdaptiveSearchGridFiller::SetAdaptiveGridCharsL(  const TInt aMaxSpacesNumber )

	{

	TPtr ptr = iKeyMap->Des();

	//To do upper case for all characters

	ptr.UpperCase();

	CDesCArray* array = new (ELeave) CDesCArrayFlat( KAdaptiveSearchKeyMapGranularity );

	CleanupStack::PushL( array );

	TInt length = ptr.Length();

	for( TInt ii = 0; ii < length; ii++ )

	    {

	    array->AppendL( ptr.Mid( ii, 1 ) );

	    }

	// Alphabetical sort

	array->Sort( ECmpCollated );

	ptr.Zero();

    // Add space character only if user typed already some characters

    // in the find pane and more spaces can be found in contacts than

    // in the current search string.

    TInt searchTextLength = iSearchField.TextLength();

    HBufC* searchText = HBufC::NewL( searchTextLength );

	TPtr ptrSearchText = searchText->Des();

	iSearchField.GetSearchText( ptrSearchText );

    if ( searchTextLength > 0 

        && NumberOfSpacesInString( ptrSearchText ) < aMaxSpacesNumber  )

        {

        ptr.Append( TChar( ' ' ) );

        }

    delete searchText;

    searchText = NULL;

	for( TInt ii = 0; ii < length; ii++ )

	    {

	    ptr.Append(array->MdcaPoint( ii ));

	    }

	CleanupStack::PopAndDestroy();//array

	if( iCurrentGrid )

		{

		if( !iCurrentGrid->Des().Compare( *iKeyMap ) )

			{

			//same grid again

			if( !iInvalidateAdaptiveSearchGrid )

				{

				//if grid hasn't been invalidated, we do not need to set it again

				return;

				}

			}

		}

	iInvalidateAdaptiveSearchGrid = EFalse;

	delete iCurrentGrid;

	iCurrentGrid = NULL;

	iCurrentGrid = iKeyMap->Des().AllocL();

	iSearchField.SetAdaptiveGridChars( *iKeyMap );

	if ( iSetFocusToSearchGrid )

	    {

        // set the focus to findbox

	    iSearchField.DrawDeferred();

	    iSetFocusToSearchGrid = EFalse;

	    }

	}

CDesC16Array* CPbk2AdaptiveSearchGridFiller::SplitContactFieldTextIntoArrayLC(

        const TDesC& aText )

    {

    const TInt KGranularity = 2;

    CDesCArrayFlat* array = new ( ELeave ) CDesCArrayFlat( KGranularity );

    CleanupStack::PushL( array );

    const TInt textLength = aText.Length();

    for ( TInt beg = 0; beg < textLength; ++beg )

        {

        // Skip separators before next word

        if ( !iNameFormatter.IsFindSeparatorChar( aText[beg] ) )

            {

            // Scan the end of the word

            TInt end = beg;

            for (; end < textLength &&

                   !iNameFormatter.IsFindSeparatorChar( aText[end] );

                ++end )

                {

                }

            const TInt len = end - beg;

            // Append found word to the array

          	array->AppendL( aText.Mid( beg,len ) );

            // Scan for next word

            beg = end;

            }

        }

    if ( array->MdcaCount() == 0 && textLength > 0 )

        {

        // aText is all word separator characters

        // -> make a "word" out of those

        array->AppendL( aText );

        }

    return array;

    }

void CPbk2AdaptiveSearchGridFiller::BuildGridL( const TDesC& aContactTitle, const TDesC& aSearchString, HBufC*& aKeyMap )

	{

	CDesC16Array* contactTitles = SplitContactFieldTextIntoArrayLC( aContactTitle );

	CDesC16Array* searchWords = SplitContactFieldTextIntoArrayLC( aSearchString );

	//in searchWords list, the last term is the only one which generates new keymap characters

	//other ones are used only for matching

	if( searchWords->MdcaCount() == 0 )

		{

		searchWords->AppendL( KNullDesC );

		}

	if( aSearchString.Length() > 0 )

		{

		if( aSearchString[ aSearchString.Length() - 1 ] == TChar( ' ' ) )

			{

			//because we now start new search term, we must add KNullDesC so we

			//can find the matching new words

			searchWords->AppendL( KNullDesC );

			}

		}

	const TInt searchWordCount = searchWords->MdcaCount();

	TBool contactMatch( searchWordCount == 1 );

	for( TInt i( 0 ); i < searchWordCount; i++ )

		{

		TInt contactTitleCount = contactTitles->MdcaCount();

		TBool contactTitleMatch( EFalse );

		for( TInt j( 0 ); j < contactTitleCount; j++ )

			{

			TPtrC searchWord = searchWords->MdcaPoint( i );

			TPtrC contactTitle = contactTitles->MdcaPoint( j );

			const TBool lastSearchWord = ( i == searchWordCount - 1 );

			TBool match( EFalse );

			if( lastSearchWord )

				{

				if( !contactMatch )

					{

					//none of the previous words didin't match, so why this is not filtered?

					//marked contact!?

					}

				else

					{

					match = iFindUtil->Interface()->MatchAdaptiveRefineL( contactTitle, searchWord, aKeyMap );

					}

				}

			else

				{

				match = iFindUtil->Interface()->MatchRefineL( contactTitle, searchWord );

				}

			if( match )

				{

				if( !contactTitleMatch )

					{

					contactTitles->Delete( j );

					//allow one search word to take away only one contactTitle

					contactTitleMatch = ETrue;

					//for loop must go from first contact title to last

					//to be consistent with match functionality of VPbk.

					j--; contactTitleCount--;

					}

				contactMatch = ETrue;

				}

			}

		}

	CleanupStack::PopAndDestroy( 2 );//contactTitle, searchWords

	}

TInt CPbk2AdaptiveSearchGridFiller::NumberOfSpacesInString(

    const TDesC& aSearchString )

    {

    TInt numberOfSpaces = 0;

	TInt searchResult = 0;

	TPtrC ptr = aSearchString;

	while ( searchResult != KErrNotFound )

	    {

		searchResult = ptr.Locate( TChar( ' ' ) );

		if ( searchResult != KErrNotFound )

		    {

		    numberOfSpaces++;

		    ptr.Set( ptr.Right( ptr.Length() - searchResult - 1 ) );

		    }

		}