/*

* 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:  Phonebook 2 contact editor dialog implementation.

*

*/

#ifndef CPBK2ADAPTIVESEARCHGRIDFILLER_H

#define CPBK2ADAPTIVESEARCHGRIDFILLER_H

//  INCLUDES

#include <e32base.h>

#include <aknsfld.h>

#include <MPsResultsObserver.h>

#include "MVPbkViewContact.h"

// FORWARD DECLARATIONS

class CAknSearchField;

class CFindUtil;

class CPbk2AdaptiveGrid;

class MVPbkContactViewBase;

class MPbk2ContactNameFormatter;

class CPSRequestHandler;

// CLASS DECLARATION

/**

 * Phonebook 2 adaptive search grid filler.

 * 

 * This class used to create adaptive search grid used to

 * search contacts from Phonebook 2.

 */

NONSHARABLE_CLASS(CPbk2AdaptiveSearchGridFiller) : public CActive,

                                                   public MPsResultsObserver

    {

    public: // Constructors and destructor

        /**

         * Creates a new instance of this class.

         *

         * @param aField Search field where adaptive search grid is updated.

         */

        static CPbk2AdaptiveSearchGridFiller* NewL( CAknSearchField& aField, MPbk2ContactNameFormatter& aNameFormatter );

        /**

         * Destructor.

         */

        virtual ~CPbk2AdaptiveSearchGridFiller();

    public: // Interface

        /**

         * Start creating adaptive search grid

         * 

         * Grid will be created asynchronously. When the grid is updated, it is

         * automatically updated to the CAknSearchField object provided in the

         * construction of this object. Client will not be notified when constructing

         * of the grid is ready.

         *

         * @param aModel contains contacts shown in the list box, this is used

         * 				 to create adaptive search grid

         * @param aFindText is text user has entered in the find pane.

         */

    	void StartFillingL( const MVPbkContactViewBase& aView, const TDesC& aSearchString, TBool aClearCache );

        /**

         * Stop creating adaptive search grid

         */

    	void StopFilling();

        /**

         * Clear adaptive search grid cache.

         * 

         * Data set (contacts shown in the list box) has changed, e.g. contact is removed or added.

         * This means that adaptive search grids used before, cannot be reused.

         */

    	void ClearCache();

        /**

         * Invalidate Adaptive Search Grid

         * 

         * This means that even if the adaptive search grid doesn't set, it is still given again to the

         * Avkon component. If this is not called, then the grid is given to Avkon components only when

         * it changes.

         */

    	void InvalidateAdaptiveSearchGrid();

    	/**

         * Change focus back to Adaptive Search Grid

         * 

         * This means that even if the "C" key is pressed,the focus will be change to parent control.

         * But actually this operation is done to Adaptive Search Grid. So set the focus back to it.

         */

    	 void SetFocusToAdaptiveSearchGrid();

    private: // from CActive

    	void RunL();

    	void DoCancel();

    	TInt RunError( TInt aError );    	

    private: // from MPsResultsObserver

        void HandlePsResultsUpdate(

            RPointerArray<CPsClientData>& searchResults,

            RPointerArray<CPsPattern>& searchSeqs);

        void HandlePsError(TInt aErrorCode);

        void CachingStatus(TCachingStatus& aStatus, TInt& aError);

    private: // Implementation

        CPbk2AdaptiveSearchGridFiller( CAknSearchField& aField, MPbk2ContactNameFormatter& aNameFormatter );

        void ConstructL();

        CPbk2AdaptiveGrid* KeyMapFromCache( const TDesC& aFindText );

        void AddKeyMapToCacheL( const TDesC& aFindText, const TDesC& aKeyMap );

        void SetAdaptiveGridCharsL( const TInt aMaxSpacesNumber, const TInt aSearchStringSpacesNumber );

        CDesC16Array* SplitContactFieldTextIntoArrayLC( const TDesC& aText );

        CDesC16Array* SplitSearchFieldTextIntoArrayLC( const TDesC& aText );

		void BuildGridL( const TDesC& aContactString, const CDesC16Array* aSearchWords, HBufC*& aKeyMap );

        TInt NumberOfSpacesInString( const TDesC& aSearchString );

        // Used to judge if this contact's title include drgraphs

        TBool IsDigraphContactsTitleL(const TDesC& aContactTitle);

        TBool GridFromPsEngineL( const MVPbkContactViewBase& aView );

        // Check whether the title is empty or not.

        TBool IsActualTitleEmpty( const MVPbkViewContact& aContact );

    private: // Data

		/// Own: Containts adaptive search grid.

		HBufC* iKeyMap;

		/// Own: Contacts in the model are processed in a steps, this variable is

		///      used to hold the next step.

		TInt iCounter;

		/// Ref: Search field where use enters the text. Responsible to show adaptive search grid. 

		CAknSearchField& iSearchField;

		/// Own: Cache adaptive grid keymaps 

		RPointerArray<CPbk2AdaptiveGrid> iAdaptiveGridCache;

		/// Ref: View containing contacts. 

		const MVPbkContactViewBase* iView;

		/// Ref: Used to format contact name 

		MPbk2ContactNameFormatter& iNameFormatter;

		/// Own: Search string used to match contacts

		HBufC* iSearchString;

		/// Own: Find util used to match contacts and construct character grid

		CFindUtil* iFindUtil;

		/// Own: Current adaptive search grid. Used to prevent setting same grid multiple times.

		HBufC* iCurrentGrid;

		/// Used to invalidate grid, even if the grid remains same, it is anyway set if this is set to

		/// ETrue

		TBool iInvalidateAdaptiveSearchGrid;

		/// Used to get the focus for the search pane,when it is true, the search pane will be drawn and get

		/// the focus

		TBool iSetFocusToSearchGrid;

		/// Used to save the contacts' title which include drgraphs

		RPointerArray<HBufC> iDigraphContactsTitleArray;

	    /// Own: Number of contacts in view

	    TInt iViewItemCount;

        /// Own: Predictive search handler

        CPSRequestHandler* iPsHandler;

    };

#endif // CPBK2ADAPTIVESEARCHGRIDFILLER_H

// End of File