/*

* Copyright (c) 2008-2009 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:    AIW command handler base class

*

*/

#ifndef C_GLXCOMMANDHANDLERAIWBASE_H

#define C_GLXCOMMANDHANDLERAIWBASE_H

#include <AiwCommon.h>

#include <glxmedialistcommandhandler.h>

#include <glxmedialistiterator.h>

class CGlxAttributeContext;

class CGlxAiwServiceHandler;

class CGlxMedia;

class TGlxMedia;

class MGlxMediaList;

class CGlxAttributeRetriever;

class CAknAppUi;

/**

 *  CGlxCommandHandlerAiwBase

 *

 *  Base class for AIW command handlers

 *

 *  @lib glxcommoncommandhandlers.lib

 */

NONSHARABLE_CLASS (CGlxCommandHandlerAiwBase)

    : public CGlxMediaListCommandHandler, 

      public MAiwNotifyCallback

    {

public:

	/** Destructor */

	virtual ~CGlxCommandHandlerAiwBase();

public: // From MAiwNotifyCallback

    virtual TInt HandleNotifyL(

        TInt aCmdId,

        TInt aEventId,

        CAiwGenericParamList& aEventParamList,

        const CAiwGenericParamList& aInParamList);

protected: // From CGlxMediaListCommandHandler

    virtual TBool BypassFiltersForExecute() const;

    virtual TBool BypassFiltersForMenu() const;

    virtual TBool DoExecuteL(TInt aCommandId, MGlxMediaList& aList);

    virtual void DoDynInitMenuPaneL(TInt aResourceId, CEikMenuPane* aMenuPane);

	virtual void PreDynInitMenuPaneL( TInt aResourceId );

    virtual void DoActivateL(TInt aViewId);

    virtual void Deactivate();

protected: // New functions

    /** 

     * Constructor 

     * @param aMediaListProvider The media list owner, used by 

     *          CGlxMediaListCommandHandler

     * @param aMenuResource The menu resource that the AIW command will be 

     *          implented in

     */

	CGlxCommandHandlerAiwBase(MGlxMediaListProvider* aMediaListProvider, 

	                          TInt aMenuResource);

    /** Second phase constructor */

	void ConstructL();

    /**

     *  This appends a Uri and/or a mimetype parameter to the InParams list (see Aiw Service Handler)

     *  @param aItem - The data source. Used to extract the Uri/mimetype

     *  @param aAiwServiceHandler - Reference to the CGlxAiwServiceHandler

     *  @param aAddUri - ETrue to add the Uri, EFalse if not.

     *  @param aAddMimeType - Etrue to add the mimetype, EFalse if not.

     */

    TBool AppendDefaultAiwParameterL(const TGlxMedia& aItem, 

                                    CGlxAiwServiceHandler& aAiwServiceHandler,

                                    TBool aAddUri,

                                    TBool aAddMimeType);

protected: // New functions to be overridden by implementing class

    /**

     * Appends one or more parameters to aParamList, to represent aItem. 

     * aParamList will eventually be passed to Aiw, so the format of these 

     * parameters should be agreed with AIW.

     * @param aItem Item to examine

     * @param aParamList The parameter list to append the new parameter(s) to

     * @return True iff the parameter could be appended; False otherwise

     */

    virtual TBool AppendAiwParameterL(const TGlxMedia& aItem, 

                                     CGlxAiwServiceHandler& aAiwServiceHandler) = 0;

    /**

     * @return The command ID in the menu that AIW will replace

     */

    virtual TInt CommandId() const = 0;

    /**

     * @return The AIW command implemented

     */

    virtual TInt AiwCommandId() const = 0;

    /**

     * @return The AIW interest resource for the subclass

     */

    virtual TInt AiwInterestResource() const = 0;

    /**

     * @return The maximum number of selected items supported

     */

    virtual TInt MaxSelectedItems() const;

    /**

     * Allow the concrete implementation to do some work on the menu before

     * passing it to the AIW service handler

	 * @param aResourceId The resource ID of the menu

	 * @param aMenuPane The in-memory representation of the menu pane

	 * @see CGlxMediaListCommandHandler::DoDynInitMenuPaneL

	 */

    virtual void AiwDoDynInitMenuPaneL(TInt aResourceId, 

        CEikMenuPane* aMenuPane);

    /**

     * @return The command space to use for the command

     */    

    virtual TInt CommandSpace() const = 0;

    /**

     * @param aMenuItemText itemText for menu Item

     * @param aMenuPane menuPane in which itemText to be searched

     * @return The AIW commandId for menuItemText

     */

    TInt AiwMenuCmdIdL( const TDesC& aMenuItemText, CEikMenuPane* aMenuPane );

private:

    /**

     * Collates all Aiw parameters needed by iterating through the selected 

     * items. adding them to an internal array in the aAiwServiceHandler

     * @param aAiwServiceHandler a reference to the AiwServiceHandler

     * @return True iff all parameters were available, False otherwise

     * @see AppendAiwParameterL

     */

    TBool GatherAiwParametersL(CGlxAiwServiceHandler& aAiwServiceHandler);

    /**

     * Collates all Aiw parameters needed by iterating through the selected 

     * items adding them directly to the AIW InParams

     * @param aAiwServiceHandler a reference to the AiwServiceHandler

     * @return True iff all parameters were available, False otherwise

     * @see AppendAiwParameterL

     */

    TBool RegatherAiwParametersL(CGlxAiwServiceHandler& aAiwServiceHandler);

    /**

     * Check whether the AIW item is enabled

     * @return Whether the AIW item is enabled

     */

    TBool AiwItemEnabledL();

    TBool AppendTextParameterL(const TGlxMedia& aItem,

                              CGlxAiwServiceHandler& aAiwServiceHandler,

                              const TDesC& aText,

                              TGenericParamIdValue aGenericParamIdValue);

    /*

    TBool AppendTextParameterL(CGlxAiwServiceHandler& aAiwServiceHandler,

                              const TDesC& aText,

                              TGenericParamIdValue aGenericParamIdValue);

    */

private:

    /// Menu resource containing iCommandId

    TInt iMenuResource;

    /// The AppUI, not owned.

    CAknAppUi* iAppUi;

    /// Pointer to the AiwServiceHandler. This is the real CGlxAiwServiceHandler, of which there can only be one instance, Hence the need to wrap

    /// in this singleton class.

    CGlxAiwServiceHandler* iAiwServiceHandler;

    TInt iResourceOffset;

    };

#endif // C_GLXCOMMANDHANDLERAIWBASE_H