--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/filemanager/GFLM/src/CGflmDirectoryListingCache.cpp	Mon Jan 18 20:09:41 2010 +0200
@@ -0,0 +1,217 @@
+/*
+* 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:  Provides directory listing cache
+*
+*/
+
+
+
+// INCLUDE FILES
+#include "CGflmDirectoryListingCache.h"
+#include "GFLM.hrh"
+#include "GflmUtils.h"
+#ifndef SYMBIAN_ENABLE_SPLIT_HEADERS
+#include <f32file.h>
+#else
+#include <f32file.h>
+#include <f32file_private.h>
+#endif
+#include <e32std.h>
+
+
+// CONSTANTS
+const TInt KListingGranularity = 0x2000; // 8KB
+
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CGflmDirectoryListingCache::CGflmDirectoryListingCache
+// C++ default constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+//
+CGflmDirectoryListingCache::CGflmDirectoryListingCache(
+        RFs& aFss,
+        const TBool& aCancelIndicator ) :
+    iFss( aFss ),
+    iCancelIndicator( aCancelIndicator )
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmDirectoryListingCache::NewL
+// Two-phased constructor.
+// -----------------------------------------------------------------------------
+//
+CGflmDirectoryListingCache* CGflmDirectoryListingCache::NewL(
+        RFs& aFss,
+        const TBool& aCancelIndicator )
+    {
+    return new( ELeave ) CGflmDirectoryListingCache(
+        aFss, aCancelIndicator );
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmDirectoryListingCache::~CGflmDirectoryListingCache()
+// -----------------------------------------------------------------------------
+//
+CGflmDirectoryListingCache::~CGflmDirectoryListingCache()
+    {
+    delete iCache;
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmDirectoryListingCache::ClearCache()
+// -----------------------------------------------------------------------------
+//
+void CGflmDirectoryListingCache::ClearCache()
+    {
+    iClearCache = ETrue;
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmDirectoryListingCache::ListingL()
+// Looks if a directory's listing is already loaded and returns it. If the
+// the listing is not found, it's read and added to the cache.
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+const CGflmDirectoryListingCache::CEntryArray*
+    CGflmDirectoryListingCache::ListingL( const TDesC& aDirectory )
+    {
+
+    TIMESTAMP( "GFLM listing fetch started: " )
+
+    // Clear directory cache first if needed
+    if ( iClearCache )
+        {
+        delete iCache;
+        iCache = NULL;
+        iClearCache = EFalse;
+        }
+
+    // Check if directory is already cached
+    TBool found( EFalse );
+    if ( iCache && !aDirectory.Compare( *( iCache->iDirectory ) ) )
+        {
+        found = ETrue;
+        }
+
+    if ( !found )
+        {
+        // Read directory to cache
+        CListingNamePair* newPair = CListingNamePair::NewLC( aDirectory );
+        GetDirL( *newPair );
+        CleanupStack::Pop( newPair );
+        delete iCache;
+        iCache = NULL;
+        iCache = newPair;
+        }
+
+    TIMESTAMP( "GFLM listing fetch ended: " )
+
+    return iCache->iListing;
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmDirectoryListingCache::GetDirL
+// -----------------------------------------------------------------------------
+//
+void CGflmDirectoryListingCache::GetDirL( CListingNamePair& aPair )
+    {
+    RDir dir;
+    User::LeaveIfError( dir.Open(
+        iFss,
+        *aPair.iDirectory,
+        KEntryAttNormal | KEntryAttDir ) );
+    CleanupClosePushL( dir );
+
+    TInt err( KErrNone );
+
+	do
+		{
+        if ( iCancelIndicator )
+            {
+            // User has canceled the operation, abort
+            User::Leave( KErrCancel );
+            }
+
+		err = dir.Read( iEntryBuffer );
+		if ( err == KErrNone || err == KErrEof )
+			{
+			TInt entryCount( iEntryBuffer.Count() );
+			if ( !entryCount )
+			    {
+				break;
+				}
+            for ( TInt i( 0 ); i < entryCount; i++ )
+			    {
+                const TEntry& entry( iEntryBuffer[ i ] );
+                TInt entrySize( EntrySize( entry ) );
+                aPair.iListing->AppendL( entry, entrySize );
+				}
+			}
+
+		}while ( err == KErrNone );
+
+    if ( err != KErrNone && err != KErrEof )
+        {
+        User::Leave( err );
+        }
+
+    CleanupStack::PopAndDestroy( &dir );
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmDirectoryListingCache::CListingNamePair::~CListingNamePair()
+// -----------------------------------------------------------------------------
+//
+CGflmDirectoryListingCache::CListingNamePair::~CListingNamePair()
+    {
+    delete iDirectory;
+
+    if ( iListing )
+        {
+        iListing->Reset();
+        delete iListing;
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmDirectoryListingCache::CListingNamePair::ConstructL()
+// -----------------------------------------------------------------------------
+//
+void CGflmDirectoryListingCache::CListingNamePair::ConstructL(
+        const TDesC& aDirectory )
+    {
+    iDirectory = aDirectory.AllocL();
+    iListing = new( ELeave ) CEntryArray( KListingGranularity );
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmDirectoryListingCache::CListingNamePair::NewLC()
+// -----------------------------------------------------------------------------
+//
+CGflmDirectoryListingCache::CListingNamePair*
+    CGflmDirectoryListingCache::CListingNamePair::NewLC(
+        const TDesC& aDirectory )
+    {
+    CListingNamePair* self = new ( ELeave ) CListingNamePair();
+    CleanupStack::PushL( self );
+    self->ConstructL( aDirectory );
+    return self;
+    }
+
+//  End of File