/*

 * Copyright (c) 2005-2006 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:  CPosLmTextCriteria class

 *

 */

 #ifndef CPOSLMTEXTCRITERIA_H

 #define CPOSLMTEXTCRITERIA_H

 #include <e32base.h>

 #include <lbsfields.h>

 #include <EPos_CPosLandmark.h>

 #include "EPos_CPosLmSearchCriteria.h"

 const TInt KPosLmMaxSearchStringLength = 255;

 /**

 *  Criterion for searching for landmarks which contain a certain text.

 *

 *  The search is defined by providing a text to search for and the position

 *  fields and text attributes to search.

 *

 *  If no attributes are specified for the search, all text attributes in the

 *  landmarks are searched. If no position fields are specified, then all

 *  fields are searched.

 *

 *  If this criterion is passed to

 *  @ref CPosLandmarkSearch::StartLandmarkSearchL, only landmarks which contain

 *  the specified text are returned.

 *

 *  Wild-card characters are supported.

 *

 *  This criterion is only valid when searching for landmarks, i.e. if it

 *  is passed to @p CPosLandmarkSearch::StartCategorySearchL, the function

 *  will fail with error code @p KErrArgument.

 *

 *  @lib eposlmsearchlib.lib

 *  @since S60 3.0

 */

 class CPosLmTextCriteria : public CPosLmSearchCriteria

     {

     public:

         /**

         * Two-phased constructor.

         * @returns A new instance of this class.

         */

         IMPORT_C static CPosLmTextCriteria* NewLC();

         /**

         * Destructor.

         */

         virtual ~CPosLmTextCriteria();

     public:

         /**

         * Retrieves the text to search for.

         *

         * @return The text to search for.

         */

         IMPORT_C TPtrC Text() const;

         /**

         * Sets the search string.

         *

         * A non-empty text string must be set, otherwise

         * @ref CPosLandmarkSearch::StartLandmarkSearchL will leave with error

         * code @p KErrArgument.

         *

         * The search is case insensitive.

         *

         * Wild-card characters "?" and "*" are supported in the search string.

         * "?" matches a single occurrence of any character and "*" matches

         * zero or more consecutive occurrences of any characters.

         *

         * A landmark matches the criterion if specified text is found anywhere

         * in selected attributes or position fields.

         *

         * @param aText The text to search for.

         *

         * @leave KErrArgument The search string is longer than @p KPosLmMaxSearchStringLength.

         */

         IMPORT_C void SetTextL( const TDesC& aText );

         /**

         * Retrieves the landmark attributes which should be searched.

         *

         * This function returns a bitmap of landmark attributes. The landmark

         * attributes are defined by @p CPosLandmark::_TAttributes. It is only

         * possible to search the @p ELandmarkName and @p EDescription

         * attributes.

         *

         * @return A bitmap indicating which landmark attributes should be

         *   searched.

         */

         IMPORT_C CPosLandmark::TAttributes AttributesToSearch() const;

         /**

         * Sets which landmark attributes to search.

         *

         * The client passes a bitmap of the landmark attributes to search. It

         * is only possible to search the @p ELandmarkName and @p EDescription

         * attributes.

         *

         * @param aAttributes A bitmap indicating which landmark attributes

         *   should be searched.

         *

         * @panic "Landmarks Client"-EPosInvalidLandmarkAttribute

         *   Unsupported attribute is passed.

         */

         IMPORT_C void SetAttributesToSearch(

             CPosLandmark::TAttributes aAttributes

         );

         /**

         * Retrieves a list of the position fields to search.

         *

         * @param[out] aFieldArray On return, contains a list of the position fields

         *   which are used in a search. If no position fields have been set,

         *   the array is empty. Position fields are identified by values defined

         *   in @p TPositionFieldId.

         */

         IMPORT_C void GetPositionFieldsToSearchL(

             RArray<TUint>& aFieldArray

         ) const;

         /**

         * Sets the position fields to search.

         *

         * Any previously set position fields are cleared by this call.

         *

         * @param[in] aFieldArray A list of the position fields to search.

         *   Position fields are identified by values defined in

         *   @p TPositionFieldId.

         */

         IMPORT_C void SetPositionFieldsToSearchL(

             const RArray<TUint>&  aFieldArray

         );

         /**

         * Clears the position fields list used in a search.

         */

         IMPORT_C void ClearPositionFieldsToSearch();

     private:

         CPosLmTextCriteria();

         void ConstructL();

         // Prohibit copy constructor

         CPosLmTextCriteria( const CPosLmTextCriteria& );

         // Prohibit assigment operator

         CPosLmTextCriteria& operator= ( const CPosLmTextCriteria& );

     private:

         HBufC*                      iText;

         RArray<TUint>               iPositionFieldArray;

         CPosLandmark::TAttributes   iAttributes;

     };

 #endif      // CPOSLMTEXTCRITERIA_H