menucontentsrv/srvsrc/menusrvmmchistory.cpp
changeset 0 79c6a41cd166
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/menucontentsrv/srvsrc/menusrvmmchistory.cpp	Thu Dec 17 08:54:17 2009 +0200
@@ -0,0 +1,124 @@
+/*
+* Copyright (c) 2009 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:
+*
+*/
+
+// INCLUDE FILES
+
+#include <f32file.h>
+#include <s32file.h>
+#include <sysutil.h> 
+#include "menusrvmmchistory.h"
+
+// CONSTANTS
+
+LOCAL_D const TInt KMenuMmcHistoryLength = 2;
+
+// ==================== MEMBER FUNCTIONS ====================
+
+// ---------------------------------------------------------
+// CMenuSrvMmcHistory::LoadL
+// ---------------------------------------------------------
+//
+void CMenuSrvMmcHistory::LoadL( RFs& aFs, const TDesC& aFname )
+    {
+    iMmcList.Reset();
+    TUint att;
+    if ( KErrNotFound != aFs.Att( aFname, att ) )
+        {
+        RFileReadStream stream;
+        CleanupClosePushL( stream );
+        User::LeaveIfError( stream.Open
+            ( aFs, aFname, EFileStream | EFileShareReadersOnly) );
+        TInt len = Min( KMenuMmcHistoryLength, stream.ReadInt32L() );
+        while( len-- )
+            {
+            iMmcList.AppendL( stream.ReadUint32L() );
+            }
+        CleanupStack::PopAndDestroy( &stream );
+        }
+    }
+
+// ---------------------------------------------------------
+// CMenuSrvMmcHistory::SaveL
+// Method do not work if there is no free space on C drive. 
+// ---------------------------------------------------------
+//
+void CMenuSrvMmcHistory::SaveL( RFs& aFs, const TDesC& aFname )
+    {
+	if ( SysUtil::DiskSpaceBelowCriticalLevelL( &aFs, 0, EDriveC) )
+		{
+		return;
+		}
+    
+    RFileWriteStream stream;
+    CleanupClosePushL( stream );
+    User::LeaveIfError( stream.Replace
+        ( aFs, aFname, EFileStream | EFileShareExclusive ) );
+    stream.WriteInt32L( iMmcList.Count() );
+    for ( TInt i = 0; i < iMmcList.Count(); i++ )
+        {
+        stream.WriteUint32L( iMmcList[i] );
+        }
+    CleanupStack::PopAndDestroy( &stream );
+    }
+
+// ---------------------------------------------------------
+// CMenuSrvMmcHistory::InsertL
+// ---------------------------------------------------------
+//
+void CMenuSrvMmcHistory::InsertL( TUint aMmc )
+    {
+    TInt i = iMmcList.Find( aMmc );
+    switch ( i )
+        {
+        case 0:
+            {
+            // aMmc is already first, do nothing.
+            break;
+            }
+
+        case KErrNotFound:
+            {
+            // aMmc is not in the list. Insert as first.
+            if ( iMmcList.Count() == KMenuMmcHistoryLength )
+                {
+                // List already full - remove last item to make space.
+                iMmcList.Remove( KMenuMmcHistoryLength - 1 );
+                }
+            iMmcList.InsertL( aMmc, 0 );
+            break;
+            }
+
+        default:
+            {
+            // aMmc is in the list, but not first. Move to first place.
+            iMmcList.Remove( i );
+            iMmcList.InsertL( aMmc, 0 );
+            break;
+            }
+        }
+    }
+
+// ---------------------------------------------------------
+// CMenuSrvMmcHistory::Find
+// ---------------------------------------------------------
+//
+TInt CMenuSrvMmcHistory::Find( TUint aMmc )
+    {
+    return iMmcList.Find( aMmc );
+    }
+
+//  End of File