/*

* 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 "MPbk2FilteredViewStack.h"

#include <MPbk2ContactViewSupplier.h>

#include <MPbk2ApplicationServices.h>

#include <MPbk2AppUi.h>

#include <CPbk2StoreConfiguration.h>

#include <MPbk2ContactNameFormatter2.h>

#include <FindUtil.h>

#include <badesca.h>

#include <featmgr.h>

#include <CPsRequestHandler.h>

const TInt KMaxAdaptiveGridCacheCount = 10;

const TInt KAdaptiveSearchKeyMapGranularity = 100;

const TInt KAdaptiveSearchRefineStep = 25;

const TInt KContactFormattingFlags = MPbk2ContactNameFormatter::EPreserveLeadingSpaces |

            MPbk2ContactNameFormatter::EReplaceNonGraphicChars |

            MPbk2ContactNameFormatter::EDisableCompanyNameSeparator;

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& GetFindText() const

			{

			return *iFindText;

			}

		const TDesC& GetKeyMap() 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();

    if ( iPsHandler )

        {

        iPsHandler->RemoveObserver( this );

        delete iPsHandler;

        }

	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();

    // UI Language

	TLanguage uiLanguage = User::Language();

	if ( uiLanguage != ELangJapanese && uiLanguage != ELangPrcChinese && 

	        uiLanguage != ELangHongKongChinese && uiLanguage != ELangTaiwanChinese &&

	        uiLanguage != ELangKorean )

	    {  

        iPsHandler = CPSRequestHandler::NewL();

        iPsHandler->AddObserverL( this );

	    }

    }

void CPbk2AdaptiveSearchGridFiller::StartFillingL( const MVPbkContactViewBase& aView,

        const TDesC& aSearchString, TBool aClearCache )

	{

    if( aClearCache )

        {

        ClearCache();

        }

	if ( IsActive() && iView == &aView && iViewItemCount == aView.ContactCountL() 

	        && iSearchString && !iSearchString->Compare( aSearchString ) )

	    {

	    return;

	    }

	else

	    {

	    StopFilling();

	    }

    CPbk2AdaptiveGrid* keyMap = KeyMapFromCache( aSearchString );

    if( keyMap )

        {

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

        return;

        }

	iViewItemCount = aView.ContactCountL();

	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;

	if ( iSearchString->Length() <= KPsAdaptiveGridSupportedMaxLen && GridFromPsEngineL( aView ) )

	    {

	    return;

	    }

	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();

	if( stopCount > itemCount )

		{

		stopCount = itemCount;

		}

	TInt maxSpacesNumber = 0;

    CDesC16Array* searchWordsArray = SplitSearchFieldTextIntoArrayLC( *iSearchString );

    TInt searchStringSpacesNumber = searchWordsArray->MdcaCount() - 1;

	for( ; iCounter < stopCount; iCounter++ )

		{

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

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

		HBufC* title = NULL;

		if( FeatureManager::FeatureSupported( KFeatureIdFfContactsCompanyNames ) )

            {

            MPbk2ContactNameFormatter2* nameformatterExtension =

                    reinterpret_cast<MPbk2ContactNameFormatter2*>( iNameFormatter.

                    ContactNameFormatterExtension( MPbk2ContactNameFormatterExtension2Uid ) );

            if ( nameformatterExtension && titleLength )

                {

                title = nameformatterExtension->GetContactTitleWithCompanyNameL( contact.Fields(),

                    KContactFormattingFlags );

                }

            }

        else if ( titleLength )

            {

            title = iNameFormatter.GetContactTitleL( contact.Fields(), KContactFormattingFlags );

            }

		if ( !title )

		    {

		    title = HBufC::NewL( titleLength );

		    }

        CleanupStack::PushL( title );

		BuildGridL( *title, searchWordsArray, iKeyMap );

		// check number of spaces in the contact title

		TInt numberOfSpaces = NumberOfSpacesInString( *title );

		if ( numberOfSpaces > maxSpacesNumber )

		    {

		    maxSpacesNumber = numberOfSpaces;

		    }

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

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

		if ( IsDigraphContactsTitleL( *title ) )

			{			

			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, searchWordsArray, iKeyMap );

    		}

		}

    CleanupStack::PopAndDestroy( searchWordsArray ); //searchWordsArray

	if( stopCount == itemCount )

		{

		SetAdaptiveGridCharsL( maxSpacesNumber, searchStringSpacesNumber );

		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( iAdaptiveGridCache[i] != NULL

		    && !aFindText.Compare( iAdaptiveGridCache[i]->GetFindText() ) )

			{

			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 );

    // Keep always in the cache at position 0 the grid cache element for empty find box,

    // which is the one that requires more time to be built

    if ( aFindText.Length() == 0 )

        {

        if ( iAdaptiveGridCache.Count() > 0 )

            {

            delete iAdaptiveGridCache[0];

            iAdaptiveGridCache.Remove( 0 );

            }

        iAdaptiveGridCache.InsertL( keyMap, 0 );

        }

    else

        {

        if ( iAdaptiveGridCache.Count() == 0 )

        {

        iAdaptiveGridCache.InsertL( NULL, 0 );

        }

        iAdaptiveGridCache.InsertL( keyMap, 1 );

        // Delete oldest cache element

        if( iAdaptiveGridCache.Count() > KMaxAdaptiveGridCacheCount )

            {

            delete iAdaptiveGridCache[KMaxAdaptiveGridCacheCount];

            iAdaptiveGridCache.Remove( KMaxAdaptiveGridCacheCount );

            }

        }

    CleanupStack::Pop(); //keyMap

	}

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, const TInt aSearchStringSpacesNumber )

	{

	TPtr ptr = iKeyMap->Des();

	// 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,

	// - and space is not the last character in the search string.

    if ( iSearchString->Length() > 0 

         && aMaxSpacesNumber > aSearchStringSpacesNumber

         && (*iSearchString)[iSearchString->Length() - 1] != TChar( ' ' ) )

        {

        ptr.Append( TChar( ' ' ) );

        }

	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;

				}

			}

		}

	delete iCurrentGrid;

	iCurrentGrid = NULL;

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

	iSearchField.SetAdaptiveGridChars( *iKeyMap );

    iInvalidateAdaptiveSearchGrid = EFalse;

	if ( iSetFocusToSearchGrid )

	    {

        // set the focus to findbox

	    iSearchField.DrawDeferred();

	    iSetFocusToSearchGrid = EFalse;

	    }

	}

CDesC16Array* CPbk2AdaptiveSearchGridFiller::SplitContactFieldTextIntoArrayLC(

        const TDesC& aText )

    {

    // Attempt to minimize the allocations considering 3 words for the search fields:

    // FirstName, LastName, CompanyName.

    const TInt KGranularity = 2; // Attempt to minimize the allocations

    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] ) )

            {

            continue;

            }

        // Scan till the end of the word

        TInt end;

        for ( end = beg + 1;

              end < textLength && !iNameFormatter.IsFindSeparatorChar( aText[end] );

              ++end )

            {

            }

        // Append found word to the array

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