author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 03 May 2010 12:31:32 +0300 | |
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parent 23 | 74c9f037fd5d |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Manager of media item cache |
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* |
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*/ |
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#ifndef C_GLXCACHEMANAGER_H |
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#define C_GLXCACHEMANAGER_H |
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#include <e32base.h> |
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#include "mglxcache.h" |
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#include "mglxcacheobserver.h" |
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#include "mglxmediapool.h" |
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#include "glximagereader.h" |
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#include <apmstd.h> |
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#ifdef USE_S60_TNM |
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#include <thumbnailmanager.h> |
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#include <thumbnailmanagerobserver.h> |
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#endif |
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// Forward declarations |
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class CFbsBitmap; |
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class CGlxCache; |
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class CGlxGarbageCollector; |
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class CGlxMedia; |
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class CGlxMediaList; |
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class CMPXCollectionPath; |
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class CMPXMedia; |
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class MGlxMediaList; |
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class CGlxImageViewerManager; |
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/** |
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* CGlxCacheManager |
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* |
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* Manager of item caches |
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* |
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* @lib glxmedialists.lib |
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*/ |
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class CGlxCacheManager : public CBase, |
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public MGlxCache, |
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public MGlxMediaPool |
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#ifdef USE_S60_TNM |
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, public MThumbnailManagerObserver |
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#endif |
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{ |
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public: |
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/** |
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* Return a reference-counted instance of CGlxCacheManager. User MUST Close() this when finished with it. |
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* @return Singleton cache manager object |
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*/ |
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static CGlxCacheManager* InstanceL(); |
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/** |
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* Called when a media item has new attributes |
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* @param aIdSpaceId Id space of media item |
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* @param aMedia The media object |
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* @param aError Error |
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*/ |
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void HandleCollectionMediaL(const TGlxIdSpaceId& aIdSpaceId, const CMPXMedia& aMedia, TInt aError); |
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/** |
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* Informs that focus in the window of the list has changed. The lists |
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* calls this function so that the manager knows to start updating the cache |
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* to load the now needed items. |
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* |
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* @param aList List that has changed |
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*/ |
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void HandleWindowChangedL(CGlxMediaList* aList); |
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/** |
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* Handles modification of item in a cache |
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* |
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* @param aIdSpaceId Id space of the cache containing the media item |
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* @param aMediaId Media item id |
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* @param aAttributes Attributes that have been modified |
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*/ |
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void HandleItemModified(const TGlxIdSpaceId& aIdSpaceId, const TGlxMediaId& aMediaId, const RArray<TMPXAttribute>& aAttributes); |
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/** |
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* Returns the temporary thumbnail used in a thumbnail request |
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* @return The temporary thumbnail used in a thumbnail request |
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* @deprecated Temporary solution - waiting for global chunk solution |
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*/ |
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CFbsBitmap* TempThumbnail(); |
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/** |
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* The Id of the temporary thumbnail used in a thumbnail request |
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* @return The Id of the temporary thumbnail used in a thumbnail request |
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* @deprecated Temporary solution - waiting for global chunk solution |
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*/ |
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TGlxMediaId TempThumbnailId(); |
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|
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/** |
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* Sets the temporary thumbnail to NULL. Thumbnail is not deleted, use when ownership has transfered to |
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* another object |
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* @deprecated Temporary solution - waiting for global chunk solution |
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*/ |
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void SetTempThumbnailToNull(); |
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|
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/** |
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* New attributes are available for a media item: broadcast this to all observers |
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* @param aIdSpaceId The Id Space of the item |
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* @param aMediaId The media id of the item |
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* @param aAttributes The new attributes |
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* @param aMedia The media item |
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*/ |
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void BroadcastAttributesAvailableL(const TGlxIdSpaceId& aIdSpaceId, |
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const TGlxMediaId& aMediaId, |
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const RArray<TMPXAttribute>& aAttributes, |
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const CGlxMedia* aMedia); |
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|
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/** |
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* Cleanup the media of the given media id: broadcast this to all observers |
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* @param aMediaId The media id of the item |
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*/ |
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void CleanupMedia(const TGlxMediaId& aMediaId); |
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|
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/** |
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* Returns an array of all id-space caches currently in use. |
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* @return Array of all id-space caches currently in use. |
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*/ |
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const RPointerArray<CGlxCache>& Caches(); |
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|
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/** |
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* Sets the temporary error flag. When set, this indicates that there is at least one temporary |
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* error on an item in the cache. |
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*/ |
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void SetTemporaryErrorFlag(); |
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|
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/** |
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* Informs that a media list has been deleted. The lists |
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* calls this function so that the manager can check to |
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* see if the last request was from this list. If so, it |
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* should reset and continue with requests from other lists |
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* |
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* @param aList List that has been deleted |
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*/ |
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void HandleListDeleted(CGlxMediaList* aList); |
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|
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/** |
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* Inform cache manager to reserve space for a number of users |
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* for all items in a particular cache |
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* |
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* @param aIdSpaceId The Id space Id to determine which cache to reserve users |
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* @param aCount The number of users to reserve space for |
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*/ |
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void ReserveUsersL(const TGlxIdSpaceId& aIdSpaceId, TInt aCount); |
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|
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/** |
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* Check if the media item selected is NULL. |
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* If media item is NULL, cancel the pending requests |
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* and place a new request |
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*/ |
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void CancelPreviousRequest(); |
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|
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public: // From MGlxCache |
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CGlxMedia* Media( const TGlxIdSpaceId& aIdSpaceId, |
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const TGlxMediaId& aMediaId ) const; |
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void AddObserverL( MGlxCacheObserver* aObserver ); |
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void RemoveObserver( MGlxCacheObserver* aObserver ); |
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void RefreshL(); |
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void Close(); |
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//OOM |
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void ReleaseRAML(TBool aFlushOnRequest = EFalse); |
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void StopRAMReleaseL(); |
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//OOM |
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void ForceCleanupMedia(TGlxIdSpaceId aSpaceId,TGlxMediaId aId); |
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|
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private: |
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/** |
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* Constructor |
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*/ |
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CGlxCacheManager(); |
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|
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/** |
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* All Garbage Clean-up,Cancel Garbage Cleanup is Centralised Here |
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* It can be used to Cancel Garbage if there is Enough Memory Else it starts Flushing 30 items Together, |
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* It can be used to start Garbage Clean-up if there is Not Enough Memory |
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* |
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* @param aStart |
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*/ |
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void HandleGarbageCollectionL(TBool aStart); |
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|
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/** |
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* Two-phase construction |
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*/ |
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static CGlxCacheManager* NewL(); |
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/** |
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* Second-phase constructor |
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*/ |
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void ConstructL(); |
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/** |
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* Destructor |
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*/ |
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virtual ~CGlxCacheManager(); |
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/** |
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* Deletes unused items in all id-space caches, requests new attributes |
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*/ |
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void MaintainCacheL(); |
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static TInt MaintainCacheL(TAny* aPtr); |
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/** |
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* Compares two paths to see if their levels match |
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*/ |
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static TBool Match(const CMPXCollectionPath& aPath1, const CMPXCollectionPath& aPath2); |
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/** |
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* Returns the cache for the given id space. Create one if it doesn't exist. |
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* @param aIdSpaceId The id space |
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* @return The cache for the id space |
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*/ |
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CGlxCache* FindCacheForceCreateL(const TGlxIdSpaceId& aIdSpaceId); |
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/** |
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* Finds a media item based on id-space and media id. Creates one if none found |
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* @param aIdSpaceId The id space of the media item |
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* @param aMediaId The id of the media item |
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* @return The media item |
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*/ |
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CGlxMedia* MediaForceCreateL(const TGlxIdSpaceId& aIdSpaceId, const TGlxMediaId& aMediaId); |
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/** |
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* Function for TLinearOrder() for comparing two CGlxCaches |
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* Used from ordering iCaches by id-space id |
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* @param aItem1 The first item to compare |
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* @param aItem2 The second item to compare |
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* @return -1 if aItem1 < aItem2; 1 if aItem1 > aItem2; 0 if aItem1 == aItem2 |
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*/ |
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static TInt CacheOrderById(const CGlxCache& aItem1, const CGlxCache& aItem2); |
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/** |
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* Function for comparing a TGlxIdSpaceId with a CGlxCache |
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* Used from ordering iCaches by id-space id |
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* @param aIdSpaceId The id space id to compare against aItem2 |
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* @param aItem2 The second item to compare |
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* @return -1 if aIdSpaceId < aItem2.Id(); 1 if aIdSpaceId > aItem2.Id(); 0 if aIdSpaceId == aItem2.Id() |
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*/ |
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static TInt CacheOrderByKey(const TGlxIdSpaceId* aIdSpaceId, const CGlxCache& aItem2); |
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/** |
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* Returns whether any requests are being made on errored attributes |
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* @return Whether any requests are being made on errored attributes |
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*/ |
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TBool ErrorsOnRequestedItemsL(); |
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/** |
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* Timer callback for temporary error reminder |
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* @param aPtr Pointer to object that started the timer |
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* @return 0 to signal that further callbacks are unnecessary, 1 otherwise |
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*/ |
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static TInt TempErrorTimerCallbackL(TAny* aPtr); |
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/** |
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* Starts the temporary error timer. When complete, the caches are checked again for any missing attributes |
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*/ |
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void StartTempErrorTimer(); |
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/** |
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* Called when the temporary error timer completes: forces a re-examination of all caches |
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*/ |
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void TempErrorTimerCompleteL(); |
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/** |
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* Create a path with the request items |
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* |
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* @param aList list to obtain the path |
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*/ |
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CMPXCollectionPath* RequestAsPathLC(const CGlxMediaList& aList); |
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/** |
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* Gets the mime type of a given file. |
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* @param aFileName The file name for which a MIME type to be determined |
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* @aMimeType The MIME type associated with the given file will be returned |
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*/ |
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void GetMimeTypeL(TFileName& aFileName, TDataType& aMimeType ); |
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#ifdef USE_S60_TNM |
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/* |
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* This function doesnt add up any value, added to reduce compiler warnings |
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*/ |
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void ThumbnailReadyL(TInt aError, MThumbnailData& aThumbnail, |
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TThumbnailRequestId aId, TBool aQuality); |
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private: // From MThumbnailManagerObserver |
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void ThumbnailPreviewReady( MThumbnailData& aThumbnail, |
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TThumbnailRequestId aId ); |
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void ThumbnailReady( TInt aError, MThumbnailData& aThumbnail, |
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TThumbnailRequestId aId ); |
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TInt FindLoadingById(TThumbnailRequestId aId, TBool aRemove = EFalse); |
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#endif |
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private: |
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/// Single instance of the cache manager |
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static CGlxCacheManager* iCacheManager; |
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|
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/// Current reference count |
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TInt iReferenceCount; |
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|
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/// List of observers, not owned |
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RPointerArray<MGlxCacheObserver> iObserverList; |
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|
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/// Caches, one per Id space. Owned. |
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RPointerArray<CGlxCache> iCaches; |
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|
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/// Bitmap for pending thumbnail request |
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CFbsBitmap* iTempThumbnail; |
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/// ID of item whose thumbnail was requested |
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TGlxMediaId iThumbnailId; |
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|
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/// Information if a request has been made to collection which |
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/// has not complete yet. (Currently, only one request is made at a time) |
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/// Stores the media list that owns the request |
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CGlxMediaList* iRequestOwner; |
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|
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/// The requested Ids in the current request |
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RArray<TGlxMediaId> iRequestedItemIds; |
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/// The requested attributes in the current request |
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RArray<TMPXAttribute> iRequestedAttrs; |
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/// The Id Space of the items in the current request |
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TGlxIdSpaceId iRequestedItemsIdSpace; |
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|
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/// Garbage collector |
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CGlxGarbageCollector* iGarbageCollector; |
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|
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/// Temporary error flag |
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TBool iTempError; |
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|
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// Clean up is On Going- Timer Started Or it is Cleaning Up |
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TBool iCleanUpOnGoing; |
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|
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/// Temporary error timer |
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CPeriodic* iTempErrorTimer; |
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|
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CAsyncCallBack* iMaintainCacheCallback; |
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|
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RArray<TInt> iRequestedItemIndexes; |
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CGlxImageReader* iReader; |
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#ifdef USE_S60_TNM |
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CThumbnailManager* iTnEngine; // Own |
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CMPXMedia* iMPXMedia; |
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|
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// Loading information |
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class TLoadingTN |
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{ |
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public: |
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TLoadingTN(TThumbnailRequestId aId, TGlxIdSpaceId aSpaceId, |
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TSize aSize, TGlxMediaId aThumbnailId) |
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: iId(aId), iSpaceId(aSpaceId), |
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iSize(aSize), iThumbnailId(aThumbnailId) |
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{ |
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} |
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|
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TThumbnailRequestId iId; |
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TGlxIdSpaceId iSpaceId; |
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TSize iSize; |
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TGlxMediaId iThumbnailId; |
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}; |
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|
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RArray<TLoadingTN> iThumbnailRequestIds; |
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#endif |
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|
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#ifdef _DEBUG |
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TTime iStartTime; |
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TTime iStopTime; |
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#endif |
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}; |
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|
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#endif // C_GLXCACHEMANAGER_H |