/*

* 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:  Plug-in main class

*

*/

#ifndef WRTDATAPLUGIN_H

#define WRTDATAPLUGIN_H

#include <aicontentpublisher.h>

#include <aipropertyextension.h>

#include <aicontentmodel.h>

#include <aieventhandlerextension.h>

class MAiContentObserver;

class MAiContentItemIterator;

class MAiPSPropertyObserver;

class CWrtData;

class CDesC16Array;

class CGulIcon;

enum TContentItem

	{

	EImage1,

	EText1

	};

/**

 *  @ingroup group_wrtdataplugin

 *

 *  Plug-in main class

 *

 *  @since S60 v3.2

 */

class CWrtDataPlugin : public CAiContentPublisher,

                     	public MAiPropertyExtension,

                     	public MAiEventHandlerExtension

    {

public :

	 /**

	 * Plugin's network state.

	 */

	enum TPluginNetworkStatus 

		{

		EUnknown, 

		EOffline,

		EOnline

		};

	/**

	 * Plugin's state.

	 */

	enum TPluginStates

		{

		ENone,

		EResume,

		ESuspend,

		EInActive,

		};

public:

    /**

    * Part of the two phased constuction

    *

    * @param none

    * @return none

    */

    static CWrtDataPlugin* NewL();

    /**

    * Destructor

    *

    * @param none

    * @return none

    */

    ~CWrtDataPlugin();

private:

    /**

    * Constructor

    *

    * @param none

    * @return none

    */

    CWrtDataPlugin();

    /**

    * Publishes widget's texts and images

    *

    * @param void

    * @return void

    */

    void PublishL();

    /**

    * Part of the two phased construction

    *

    * @param void

    * @return void

    */

    void ConstructL();

    /**

    * Resume the plug-in.

    *

    * @param aReason reason for state change, see TAiTransitionChange.

    * @return void

    */    

    void DoResumeL(TAiTransitionReason aReason);

public: // from base class CAiContentPublisher

    /**

    * From CAiContentPublisher

    * The method is called by the framework to request the plug-in free all

    * memory and CPU resources and close all its open files, e.g. the plug-in 

    * should unload its engines due backup operation. The method transits the 

    * plug-in to "Idle" state.

    *

    * @param aReason reason for state change, see TAiTransitionChange.

    * @return void

    */

    void Stop( TAiTransitionReason aReason );

    /**

    * From CAiContentPublisher

    * The method is called by the framework to instruct plug-in that it is

    * allowed to consume CPU resources, e.g plug-in is able to run timers,

    * perform asynchronous operations, etc. The method transits the plug-in

    * to "Alive" state.

    *

    * @param aReason reason for state change, see TAiTransitionChange.

    * @return void

    */

    void Resume( TAiTransitionReason aReason );

    /**

    * From CAiContentPublisher

    * The method is called by the framework to instruct plug-in that it is

    * not allowed to consume CPU resources, e.g plug-in MUST stop each

    * timers, cancel outstanding asynchronous operations, etc. The method

    * transits the plug-in to "Suspendend" state.

    *

    * @param aReason reason for state change, see TAiTransitionChange.

    * @return void

    */

    void Suspend( TAiTransitionReason aReason );

    /**

    * From CAiContentPublisher

    * Adds the content observer / subscriber to plug-in. The plug-in MUST

    * maintain a registry of subscribers and send notification to all them

    * whenever the plug-in changes state or new content available.

    *

    * @param aObserver content observer to register.

    * @return void

    */

    void SubscribeL( MAiContentObserver& aObserver );

    /**

    * From CAiContentPublisher

    * Configures the plug-in.

    * Plug-ins take ownership of the settings array, so it must either

    * store it in a member or free it. Framework has put the array in cleanup

    * stack so the plugin shouldn't do that.

    * If this leaves, the plug-in will be destroyed by AI FW.

    * Plug-in must support LaunchByValue-event even if normal shortcuts don't

    * work. The only allowed serious enough leave is KErrNotFound from CenRep.

    *

    * @param aSettings setting items defined in the UI definition.

    * @return void

    */

    void ConfigureL( RAiSettingsItemArray& aSettings );

    /**

    * From CAiContentPublisher

    * Returns interface extension. In Series 60 3.1 only event & property

    * extensions are supported. See MAiEventExtension & MAiPropertyExtension

    * interfaces.

    *

    * @param  aUid - UID of the extension interface to access.

    * @return the extension interface. Actual type depends on the passed aUid 

    *         argument.

    */

    TAny* Extension( TUid aUid );  

// from base class MAiPropertyExtension

    /**

    * From MAiPropertyExtension.

    * Read property of publisher plug-in.

    *

    * @param aProperty - identification of property.

    * @return pointer to property value.

    */

    TAny* GetPropertyL( TInt aProperty );

    /**

    * From MAiPropertyExtension.

    * Write property value.

    *

    * @param aProperty - identification of property.

    * @param aValue - contains pointer to property value.

    */

    void SetPropertyL( TInt aProperty, TAny* aValue );

 // from base class MAiEventHandlerExtension

     /**

     * From MAiEventHandlerExtension

     * Invoked by the framework when plug-in must handle an event.

     * @param aEvent - unique identifier of event from plug-in content model.

     * @param aParam - parameters associated with event. Each UI Definition

     *        declares events in the format: <event name>(<event params>),

     *        where <event name> is mapped by the framework to unique

     *        identifier supplied in aEvent, <event params> are provided to

     *        plug-in as-is in the descriptor.

     * @since S60 3.2

     */

     void HandleEvent(TInt aEvent, const TDesC& aParam);

     /**

     * From MAiEventHandlerExtension

     * Invoked by the framework when plug-in must handle an event.

     *

     * @param aEventName - name of the event from plug-in content model.

     * @param aParam - parameters associated with event. Each UI Definition

     *        declares events in the format: <event name>(<event params>),

     *        where  <event name> mapping to unique identifier supplied by event 

     *        is failed by the frame work then the  <event name> and  

     *        <event params>  are provided to plug-in as-is in the descriptor.

     */

     void HandleEvent(const TDesC& aEventName, const TDesC& aParam);

    /**

 	* Invoked by the framework for querying if plugin has menu item

 	*

 	* @param aMenuItem  menu item name.

 	* @return ETrue if plugin has specific menu item, EFalse otherwise 

	*/

    TBool HasMenuItem(const TDesC16& aMenuItem);

public :

	/**

	* Gets the id of a content  

	*

	* @param aObjectId image or text id

	* @return id of the content

	*/

	TInt GetIdL(TDesC16& aObjectId);

    /**

    * Gets the type of a specific content

    *

    * @param aObjectId image or text id

    * @param aType type

    * @return void

    */

	void GetTypeL( TDesC16& aObjectId, TDes16& aType );

    /**

    * RefereshL a specific image of text in the widget

    *

    * @param aOperation operation performed

    * @return void

    */

    void RefreshL(TDesC16& aOperation );

    /**

    * Is plugin active to publish the data 

    *

    * @param void 

    * @return boolean (ETrue/EFalse)

    */

    TBool IsActive();

    /**

	* Publish a specific text of the widget  

	*

	* @param aObserver observer

	* @param aContentId content model id

	* @param aContentValue content value

	* @return void

	*/

	/*void PublishTextL(MAiContentObserver* aObserver, 

			TInt& aContentId, TDesC16& aContentValue);*/

	/**

    * Publish a specific image of the widget  

    *

    * @param aObserver observer

    * @param aContentId content model id

    * @param aHandle image handle 

    * @param aMaskHandle handle of the mask image

    * @return void

    */

    void PublishImageL(MAiContentObserver* aObserver, 

    		TContentItem aContentId, TInt aHandle, TInt aMaskHandle);

    /**

    * Publish a specific image of the widget  

    *

    * @param aObserver observer

    * @param aContentId content model id

    * @param aPath image path / skin id pattern / mif id Pattern 

    * @return void

    */

    void PublishImageL(MAiContentObserver* aObserver,

    		TContentItem aContentId, TDesC16& aPath );

    /**

    * Cleans a data from the widget

    *

    * @param aObserver observer

    * @param aContentId content model id

    * @return void

    */

    void Clean(MAiContentObserver* aObserver, 

            TInt aContentId );

    /**

     * CWrtData getter

     * @return Pointer to CWrtData

     */

    inline CWrtData* Data() const

        {

        return iData;

        }

	/*

	 * Plugin's network status getter

	 * @return Pointer to Harvester status observer

	 */

	inline TPluginNetworkStatus NetworkStatus() const

		{

		return iNetworkStatus;

		}

private: // data

    // Iterator for plugin content

    // Own

    MAiContentItemIterator* iContent;

    // Array of content observers

    // Own

    RPointerArray<MAiContentObserver> iObservers;

    // Information about the content publisher (this plug-in)

    TAiPublisherInfo iInfo;

	// Number of data in the content model.

	TInt iDataCount;

	// Dynamic content model

	// Own

	TAiContentItem* iContentModel;

	// Reference array for Published text

	// Own

	RPointerArray<HBufC> iDataArray;

	// Service API Data Subscriber.

	// Own

	CWrtData* iData;

    // References array for published images 

    // Own

    RArray<CGulIcon*> iIconArray;

    // File Server

    // Reference

    RFs iRfs;

    // Plugin's network status

    TPluginNetworkStatus iNetworkStatus;

    // Is Homescreen foreground.

    TBool iHSForeGround;

	// Plugin state    

    TPluginStates iPluginState;

    };

#endif // WRTDATAPLUGIN_H