/*

* 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:               Language database class declaration.

*

*/

#ifndef _PTI_LANGUAGE_DATABASE_H

#define _PTI_LANGUAGE_DATABASE_H

// INCLUDES

#include <badesca.h> 

#include "PtiDefs.h"

// For accessing keyboard data through LangData() method. If aIndex

// parameter is higher than KKdbThreshold client is accessing 

// keyboard data instead of ldb data.

const TInt KKdbThreshold = 500;

// For accessing key bindings through LangData() method. If aIndex

// parameter is higher than KKdbThreshold client is accessing 

// key bindings data instead of ldb or kdb data.

const TInt KKdbBindingThreshold = 2500;

const TInt KOpaqueDataLen = 8;

//

// TPtiLangDatabaseMapping

//

class TPtiLangDatabaseMapping

	{

	public:

		TInt iUid;

		TInt iLangCode;

	};	

//

// TPtiLangDatabaseMappingOpaque

//

class TPtiLangDatabaseMappingOpaque

	{

	public:

		TInt iUid;

		TInt iLangCode;

		TBuf8<KOpaqueDataLen> iOpaque;

	};

//

// TPtiLangDatabaseOpaqueBinding

//		

class TPtiLangDatabaseOpaqueBinding

    {

    public:

        TInt iUid;

       	TBuf8<KOpaqueDataLen> iOpaque;    

    };	

/**

* An interface class for wrapping language data. Core object may use this

* interface for accessing language data (but it is also ok to use any other

* way, since it is part of core object's internal implementation).

*/	

class MPtiLanguageDatabase

	{

	public:

		/**

		* Implementation UID for core object owning this data.

		*

		* @since S60 V3.0

		* @return Implementation Uid value of owning core object.

		*/	

		virtual TInt CoreUID() const = 0;

		/**

		* Number on languages implemented in this database.

		* 

		* @since S60 V3.0

		* return Number languages implemented in this database.

		*/

		virtual TInt NumLanguages() const = 0;

		/**

		* Symbian OS language code for language data.

		*

		* @since S60 V3.0

		* @param aIndex Index of language implementation (in case one database holds data

		*                for several languages).

		* @return Symbian OS language code for language data identified by aIndex. 

		*         0, if aIndex is greater than number of languages in this database.

		*/ 

		virtual TInt LanguageCode(TInt aIndex) const = 0;

		/**

		* Returns sub-language code. The meaning of this value depends on core object

		* implementation. Ususally this value is needed for enumerating several dialects

		* that are related to one Symbian OS language constant.

		*

		* @since S60 V3.0

		* @return Sub-language id. 

		*/ 

		virtual TInt SubLanguageCode(TInt aIndex) const = 0;

		/**

		* Returns pointer to raw language data. 

		* on the core object implementation.

		*

		* @since S60 V3.0

		* @param aIndex Index of language implementation.

		* @return Pointer to language data array.

		*/

		virtual TInt8* LangData(TInt aIndex) const = 0;

		/**

		* Returns pointer to language data. The meaning of the data in array depends

		* on the core object implementation.

		*

		* @since S60 V3.0

		* @param aIndex Index of language implementation.		

		* @param aNativeParams Core object related extra parameters.

		* @return Pointer to language data array.

		*/

		virtual TInt8* LangData(TInt aIndex, TAny* aNativeParams) const = 0;

		/**

		* Returns pointer to PinYin phrase input related data.

		*		

		* @since S60 V3.0

		* @return Pointer to PinYin phrase input data.

		*/

		virtual TInt8* PinyinPhraseData() const = 0;

		/**

		* Returns pointer to ZhuYin phrase input related data.

		*		

		* @since S60 V3.0

		* @return Pointer to ZhuYin phrase input data.

		*/

		virtual TInt8* ZhuyinPhraseData() const = 0;

		/**

		* Returns core object's internal language id value. The meaning of this

		* value depends on core object implementation.

		*

		* @since S60 V3.0

		* @return Core object internal language id.

		*/		

		virtual TInt NativeId(TInt aIndex) const = 0;

	};

/**

* Default implementation for MPtiLanguageDatabase interface.

*/

class CPtiLanguageDatabase : public CBase, public MPtiLanguageDatabase

	{

	public: 

		/**

		* Creates a language database instance for given implemenation UID.

		* 

		* @since S60 V3.0

		* @return Pointer to language database instance.

		*         NULL if not found. 

		*/

		IMPORT_C static CPtiLanguageDatabase* CreateDatabaseL(TUid aImplUid);

		/**

		* Returns a list of all the availbale language databases related to given core object.

		* List will be the topmost item in cleanup stack.

		*

		* @since S60 V3.0

		* @param aCoreUid Implementation uid for core object.

		* @return Pointer to a list containing implemention uids of language databases.

		*/

		IMPORT_C static CArrayFix<TInt>* ListDatabasesLC(TInt aCoreUid);

		/**

		* Returns Symbian OS language code for the first language in given language database.

		*

		* @since S60 V3.0

		* @param aUid An implementation uid for language database.

		* @return Symbian OS language constant.

		*         0, if not found.

		*/		

		IMPORT_C static TInt LanguageCodeForUid(TInt aUid);

		/**

		* Fills given array with TPtiLangDatabaseMapping bindings for given core object. 

		* Items in list bind Symbian OS language code to language database implemantion

		* uid.

		*

		* @since S60 V3.0

		* @param aCoreUid Core object implemenation uid.

		* @param aResult Resulting list.

		* @return Number of items in aResult.

		*/

		IMPORT_C static TInt CreateMappingTableL(TInt aCoreUid, RArray<TPtiLangDatabaseMapping>& aResult);

		IMPORT_C static TInt CreateMappingTableWithOpaqueL(TInt aCoreUid, RArray<TPtiLangDatabaseMappingOpaque>& aResult);

	public: 

		IMPORT_C ~CPtiLanguageDatabase();

	public: // Empty default implementations.

		IMPORT_C TInt CoreUID() const;

		IMPORT_C TInt NumLanguages() const;

		IMPORT_C TInt LanguageCode(TInt aIndex) const;

		IMPORT_C TInt SubLanguageCode(TInt aIndex) const;

		IMPORT_C TInt8* LangData(TInt aIndex) const;

		IMPORT_C TInt8* LangData(TInt aIndex, TAny* aNativeParams) const;

		IMPORT_C TInt8* PinyinPhraseData() const;

		IMPORT_C TInt8* ZhuyinPhraseData() const;

		IMPORT_C TInt NativeId(TInt aIndex) const;

	public:

		inline void SetDestructorKeyId(TInt aDtorKeyId);

	private:

		TInt iDtorKeyId;

		TInt Reserved_1;

	};

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

// CPtiLanguageDatabase::SetDestructorKeyId

// 

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

// 	

inline void CPtiLanguageDatabase::SetDestructorKeyId(TInt aDtorKeyId)

	{

	iDtorKeyId = aDtorKeyId;

	}

#endif // _PTI_LANGUAGE_DATABASE_H

// End of file