filemanager/GFLM/inc/CGflmFileRecognizer.h
branchRCL_3
changeset 39 65326cf895ed
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/filemanager/GFLM/inc/CGflmFileRecognizer.h	Wed Sep 01 12:31:07 2010 +0100
@@ -0,0 +1,180 @@
+/*
+* Copyright (c) 2002-2006 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:  Recogniser wrapper
+*
+*/
+
+
+
+#ifndef CGFLMFILERECOGNIZER_H
+#define CGFLMFILERECOGNIZER_H
+
+
+//  INCLUDES
+#include <apgcli.h>
+#include <e32base.h>
+#include <barsc.h>
+
+
+// FORWARD DECLARATIONS
+class CGflmDriveResolver;
+
+
+// CLASS DECLARATION
+
+/**
+*  A class for wrapping recogniser functionality.
+*
+*  @lib GFLM.lib
+*  @since 2.0
+*/
+NONSHARABLE_CLASS(CGflmFileRecognizer) : public CBase
+    {
+    public:  // Constructors and destructor
+
+        /**
+        * Two-phased constructor.
+        */
+        static CGflmFileRecognizer* NewL(
+            RFs& aFs,
+            TInt aMemoryConsumption,
+            CGflmDriveResolver* aDriveResolver );
+
+        /**
+        * Destructor.
+        */
+        virtual ~CGflmFileRecognizer();
+
+    public: // New functions
+
+        /**
+        * Recognises a MIME type of file.
+        * @since S60 3.1
+        * @param aFilename A name of the file
+        * @return Pointer to MIME type. KNullDesC if not recognised.
+        */
+        TPtrC RecognizeL( const TDesC& aFilename );
+
+         /**
+        * Flushed recogniser cache.
+        * @since S60 3.1
+        */
+        void FlushCache();
+
+    private:
+        
+        NONSHARABLE_CLASS(CPathTypePair) : public CBase
+            {
+            public:
+                static CPathTypePair* NewLC( const TDesC& aFilename );
+                void ConstructL( const TDesC& aFilename );
+                CPathTypePair();
+                ~CPathTypePair();
+                TInt Size() const;
+
+            public:
+                TDblQueLink iLink;
+                TInt iTypeIndex;
+                HBufC* iFilename;
+            };
+
+        NONSHARABLE_CLASS(CExtMimePair) : public CBase
+            {
+            public:
+                ~CExtMimePair();
+
+            public:
+                HBufC* iExt;
+                HBufC* iMime;
+            };
+
+        /**
+        * C++ default constructor.
+        */
+        CGflmFileRecognizer(
+            CGflmDriveResolver* aDriveResolver,
+            RFs& aFs );
+
+        /**
+        * By default Symbian 2nd phase constructor is private.
+        */
+        void ConstructL( TInt aMemoryConsumption );
+
+        /**
+        * Cleans old entries from cache according to specified per cent
+        *
+        */
+        void CleanupCache( );
+
+        /**
+        * Constructs file extension mime pairs
+        *
+        */
+        void ConstructExtMimePairsL(
+            RResourceFile& aResFile,
+            TInt aResId,
+            RPointerArray< CExtMimePair >& aPairs );
+
+        /**
+        * Finds mime from file extension
+        *
+        */
+        TPtrC FindMimeFromExt(
+            const TDesC& aExt, RPointerArray< CExtMimePair >& aPairs );
+
+        /**
+        * Does actual recognition
+        *
+        */
+        TPtrC DoRecognizeL( const TDesC& aFilename );
+        
+        /**
+         * Reset and Destroy the RPointArray of CExtMimePair
+         * 
+         */
+        static void ResetAndDestroyExtMimePairs( TAny* aPtr );
+
+    private:    // Data
+        // Own: For using the apparc recognisers
+        RApaLsSession iApaSession;
+
+        // Array for mime types, owned
+        CDesCArraySeg* iMimeTypes;
+
+        // Mime type cache, owned
+        TDblQue< CPathTypePair > iCache;
+
+        // Current memory usage for cache
+        TInt iCacheMemoryUsage;
+
+        // Maximum memory usage for cache
+        TInt iCacheMaxMemoryUsage;
+
+        // Ref: Pointer to drive resolver
+        CGflmDriveResolver* iDriveResolver;
+
+        // Own: General file extension mime pairs
+        RPointerArray< CExtMimePair > iExtMimePairs;
+
+        // Own: Remote drive specific file extension mime pairs
+        RPointerArray< CExtMimePair > iRemoteExtMimePairs;
+
+        // Ref: Open file server session
+        RFs& iFs;
+
+    };
+
+#endif      // CGFLMFILERECOGNIZER_H
+
+// End of File