/*

* Copyright (c) 2002-2007 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:  Defines an internal concrete class CAknsAppSkinInstance and

*                related types. This class encapsulates the concrete skin

*                instance which is a singleton in thread scope.

*

*/

#ifndef AKNSAPPSKININSTANCE_H

#define AKNSAPPSKININSTANCE_H

//  INCLUDES

#include <coemain.h>

#include <AknsSkinInstance.h>

#include <AknsSrvClient.h>

// FORWARD DECLARATIONS

class CAknsAppSkinInstanceCacheEntry;

class CAknsTemporaryBitmap;

class MAknsRlRenderer;

class CAknsRlDefaultRenderer;

class CAknsRlMasterLayout;

class RApaLsSession;

// DATA TYPES

/**

* Simple pointer array data type for item definitions.

*

* @internal

*/

typedef RPointerArray<CAknsItemDef> RAknsItemDefPointerArray;

/**

* Control position list entry.

*

* @internal

*/

struct TAknsControlPositionEntry

    {

    TUint iKey;

    TPoint iScreenPos;

    };

/**

* Pointer store list entry.

*

* @internal

*/

struct TAknsPointerStoreEntry

    {

    TUint iKey;

    TAny* iValue;

    };

/**

* Simple pointer array data type for cache entries.

*

* @internal

*/

typedef RPointerArray<CAknsAppSkinInstanceCacheEntry>

    RAknsAppSkinInstanceCacheEntryPointerArray;

/**

* Simple pointer array data type for temporary bitmap entries.

*

* @since 2.6

*

* @internal

*/

typedef RPointerArray<CAknsTemporaryBitmap>

    RAknsAppSkinInstanceTemporaryBitmapArray;

// CLASS DECLARATION

/**

* Concrete application skin instance.

* Application skin instance is a thread-singleton class that implements

* MAknsSkinInstance (and also MAknsDataContext to provide root data

* context).

*

* This is an internal class that contains no exported functions.

* The class is not intended for derivation outside the library.

*

* @since 2.0

*

* @internal

*/

NONSHARABLE_CLASS(CAknsAppSkinInstance) :

    public CCoeStatic, public MAknsSkinInstance, public MAknsDataContext,

    public MAknsSkinChangeObserver

    {

    protected: // Protected constructor

        /**

        * C++ default constructor.

        *

        * @internal

        */

        CAknsAppSkinInstance();

    public: // Constructors and destructors

        /**

        * Creates application skin instance singleton.

        *

        * @par Exceptions:

        *   If construction fails, leaves with an error code.

        *

        * @internal

        */

        static void CreateSingletonL();

        /**

        * Destructor.

        *

        * @internal

        */

        virtual ~CAknsAppSkinInstance();

    public: // Functions from MAknsSkinInstance - Item data

        /**

        * @copydoc MAknsSkinInstance::RootDataContext()

        */

        MAknsDataContext* RootDataContext();

        /**

        * @copydoc MAknsSkinInstance::GetCachedItemData(TAknsItemID,TAknsItemType)

        */

        CAknsItemData* GetCachedItemData( const TAknsItemID& aID,

            const TAknsItemType aType );

        /**

        * @copydoc MAknsSkinInstance::GetCachedItemData(TAknsItemID)

        */

        CAknsItemData* GetCachedItemData( const TAknsItemID& aID );

        /**

        * @copydoc MAknsSkinInstance::CreateUncachedItemDataL(TAknsItemID,TAknsItemType)

        */

        CAknsItemData* CreateUncachedItemDataL( const TAknsItemID& aID,

            const TAknsItemType aType );

        /**

        * @copydoc MAknsSkinInstance::CreateUncachedItemDataL(TAknsItemID)

        */

        CAknsItemData* CreateUncachedItemDataL( const TAknsItemID& aID );

    public: // Functions from MAknsSkinInstance - Item definitions

        /**

        * @copydoc MAknsSkinInstance::SetLocalItemDefL()

        */

        void SetLocalItemDefL( CAknsItemDef* aDef );

        /**

        * @copydoc MAknsSkinInstance::SetChangeEventsEnabled()

        */

        void SetChangeEventsEnabled( TBool aEnabled );

    public: // Functions from MAknsSkinInstance - Error handling

        /**

        * @copydoc MAknsSkinInstance::NotifyClientError();

        */

        void NotifyClientError( const TAknsClientError aError );

    public: // Functions fro MAknsSkinInstance - Querying the change reason

        /**

        * @copydoc MAknsSkinInstance::SkinChangeReason()

        */

        TAknsSkinChangeReason SkinChangeReason();

    public: // Functions fro MAknsSkinInstance - removing local item defs

        /**

        * @copydoc MAknsSkinInstance::RemoveLocalItemDefs()

        */

        void RemoveLocalItemDefs();

    public: // Functions from MAknsDataContext

        /**

        * @copydoc MAknsDataContext::ReserveItemL()

        */

        void ReserveItemL( const TAknsItemID& aID );

        /**

        * @copydoc MAknsDataContext::ReleaseItem()

        */

        void ReleaseItem( const TAknsItemID& aID );

    public: // Functions from MAknsSkinChangeObserver

        void FlushLocalCaches();

        /**

        * @copydoc MAknsSkinChangeObserver::SkinContentChanged()

        */

        void SkinContentChanged();

        /**

        * @copydoc MAknsSkinChangeObserver::SkinConfigurationChanged()

        */

        void SkinConfigurationChanged(

            const TAknsSkinStatusConfigurationChangeReason aReason );

        /**

        * @copydoc MAknsSkinChangeObserver::SkinPackageChanged()

        */

        void SkinPackageChanged(

            const TAknsSkinStatusPackageChangeReason aReason );

    public: // New functions - Testing

        /**

        * Returns the current count of local item definition list.

        */

        IMPORT_C TInt DebugLocalItemDefCount();

        /**

        * Returns the current count of item data cache.

        */

        IMPORT_C TInt DebugCacheCount();

        /**

        * Disables server error notification and registers observer.

        */

        IMPORT_C void DebugHookClientErrors( void (*aCallback)(TAny*), TAny* aParam );

        /**

        * Disables change notification and registers observer.

        */

        IMPORT_C void DebugHookChangeNotifications( void (*aCallback)(TAny*), TAny* aParam );

        /**

        * Resets the internal state.

        */

        IMPORT_C void DebugReset();

    protected:  // New functions

        /**

        * Updates cached item.

        * This method should be called when an item definition changes.

        * If item data (for the specified IID) is in the ASI cache,

        * it is reconstructed. Type of the new item definition must

        * match the existing cached item, if one exists.

        *

        * @param aCacheEntry Cache entry to be updated.

        *

        * @param aRemoveIfNotFound Boolean flag to indicate whether

        *   the cache item should be removed if no new definition is found.

        *

        * @par Exceptions:

        *   If item data creation fails, leaves with an error code.

        *   Cached item (if any) is automatically destroyed.

        *

        * @internal

        */

        void UpdateCachedItemL( CAknsAppSkinInstanceCacheEntry* aCacheEntry,

            const TBool aRemoveIfNotFound );

        /**

        * Notifies the application that an item definition has changed.

        * Sends skin resource change event to the window group of the

        * current application. Also redraws the screen (if there are items

        * in cache) to enable controls

        * that use cached items to update their appearance.

        *

        * @internal

        */

        void NotifyItemDefChange(TBool aFgOnly = EFalse);

        /**

        * Redraws the screen.

        *

        * @internal

        */

        void RedrawScreen() const;

        /**

        * Finds item definition for specified item, creates item data for

        * it and inserts it into the cache.

        *

        * @param aID Item ID to be cached.

        * @param aType Type of the item. EAknsITUnknown if any type is

        *   acceptable.

        *

        * @return Pointer to cache entry. Application skin instance still

        *   owns the cache entry object and controls its lifetime.

        *   @c NULL value is returned if no item definition is found.

        *

        * @par Exceptions:

        *   If creation fails, leaves with an error code.

        *

        * @internal

        */

        CAknsAppSkinInstanceCacheEntry* LookupCreateAndCacheL(

            const TAknsItemID& aID, const TAknsItemType aType );

        /**

        * Finds item definition for specified item and creates an independent

        * item data for it.

        *

        * @param aID Item ID matching the item data to be created.

        * @param aType Type of the item. EAknsITUnknown if any type is

        *   acceptable.

        *

        * @return Newly created item data instance for the specified item.

        *   Ownership of the item data is transferred to the caller.

        *   @c NULL value is returned if no item definition is found.

        *

        * @par Exceptions:

        *   If creation fails, leaves with an error code.

        *

        * @internal

        */

        CAknsItemData* LookupAndCreateL( const TAknsItemID& aID,

            const TAknsItemType aType );

        /**

        * Finds specified item from cache.

        *

        * @param aID Item ID to be found.

        *

        * @return Pointer to cache entry or @c NULL if none found.

        *   Application skin instance still owns the cache entry and controls

        *   its lifetime.

        *

        * @internal

        */

        CAknsAppSkinInstanceCacheEntry* FindFromCache( const TAknsItemID& aID );

        /**

        * Removes specified item from cache and destroys it.

        *

        * @param aID Item ID to be removed and destroyed.

        *

        * @internal

        */

        void RemoveAndDestroyFromCache( const TAknsItemID& aID );

        /**

        * Handles the client error condition.

        *

        * @param aError Type of the error.

        *

        * @internal

        */

        void HandleClientError( const TAknsClientError aError );

        /**

        * Finds the specified item definition, but does not construct the

        * item data object.

        *

        * @since 2.1

        *

        * @param aOwnershipTransfer Output parameter that is assigned to

        *   ETrue if the caller should destroy the returned definition

        *   object.

        *

        * @param aID Item ID of the item definition to be retrieved.

        *

        * @param aType Type (or base type) of the item definition to be

        *   retrieved.

        *

        * @return Pointer to the item definition object or @c NULL if

        *   not found. The caller must observe aOwnershipTransfer

        *   value to determine whether the object should be destroyed.

        *

        * @internal

        */

        CAknsItemDef* LookupDef( TBool& aOwnershipTransfer,

            const TAknsItemID& aID, const TAknsItemType aType );

        /**

        *

        * @since 2.8

        *

        * @internal

        */

        void UpdateLocalLayoutBitmapToServerL( const TAknsItemID& aID,

            const TInt aLayout, const TSize& aLayoutSize, CFbsBitmap* aBitmap,

            CFbsBitmap* aMask, const TBool aMorphing );

        /**

        *

        * @since 2.8

        *

        * @internal

        */

        void UpdateLocalLayoutBitmapFromServerL( const TAknsItemID& aID,

            const TInt aLayout, const TSize& aLayoutSize );

    public: // New methods

        /**

        * Retrieves (and creates if necessary) a temporary bitmap

        * for the given item ID and given size.

        *

        * @since 2.6

        *

        * @internal

        */

        CAknsTemporaryBitmap* GetTemporaryBitmapL(

            const TAknsItemID& aID, const TSize& aSize );

        /**

        * Retrieves a non-owned pointer to the renderer.

        *

        * @since 2.8

        *

        * @internal

        */

        MAknsRlRenderer* DefaultRenderer();

        /**

        * Retrieves a non-owned pointer to the master layout.

        *

        * @since 2.8

        *

        * @internal

        */

        CAknsRlMasterLayout* MasterLayout();

        /**

        * Adds a layout bitmap, ownership transferred.

        *

        * @since 2.8

        *

        * @internal

        */

        void AddLayoutBitmapL(

            const TAknsItemID& aID, CAknsMaskedBitmapItemData* aData,

            const TInt aLayout, const TSize& aLayoutSize,

            const TBool aMorphing, const TBool aLocalItem );

        /**

        * Retrieves a layout bitmap, ownership not transferred.

        *

        * @since 2.8

        *

        * @internal

        */

        CAknsImageItemData* GetLayoutBitmap( const TAknsItemID& aID,

            const TSize& aLayoutSize, const TInt aLayout, TBool& aMorphingOut, const TBool& aLocalItem );

        /**

        * Begins rendering. EndRender must be called to free the mutex

        * after rendering completes.

        *

        * @since 2.8

        *

        * @internal

        */

        void BeginRender();

        /**

        * Ends rendering. BeginRender must have been called, otherwise

        * the mutex state will be corrupted.

        *

        * @since 2.8

        *

        * @internal

        */

        void EndRender();

        /**

        * From base class MAknsSkinChangeObserver.

        * @copydoc MAknsSkinChangeObserver::IsUpdateInProgress()

        */

        TBool IsUpdateInProgress();

        /**

        * The product variant status of highlight animation.

        *

        * @return ETrue if product supports highlight animations, EFalse if

        *         highlight animations should not be used.

        * @since 3.1

        * @internal

        */

        TBool VariantHighlightAnimationEnabled();

        /**

        * Checks if the given AppUid icon has been configured with AppArc cenrep configuration file.

        * @param aAppUid application UID to check

        * @return ETrue if the icon is configured with the cenrep file, otherwise EFalse.

        */

        TBool IsIconConfiguredL( TUid aAppUid );

        /**

        * Get Current Animation Backgournd State.

        * @return ETrue if the Animation Backgournd is ON, otherwise EFalse.

        */       

        TBool AnimBackgroundState( ) const;

        /**

        * Get if wallpaper defined.

        * @return if wallpaper defined.

        */       

        TBool WallpaperDefined( ) const;

    private: // Private ConstructL

        /**

        * By default Symbian OS constructor is private.

        */

        void ConstructL();

		/**

        * Read Animation Backgournd State

        */

        void InitAnimBackgroundL( );

        /**