diff -r 491b3ed49290 -r 65326cf895ed filemanager/GFLM/src/CGflmNavigatorModel.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/filemanager/GFLM/src/CGflmNavigatorModel.cpp	Wed Sep 01 12:31:07 2010 +0100
@@ -0,0 +1,298 @@
+/*
+* 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:  Navigable file list model
+*
+*/
+
+
+
+// INCLUDE FILES
+#include <bautils.h>
+#include "CGflmNavigatorModel.h"
+#include "CGflmItemGroupImpl.h"
+#include "CGflmItemLocalizer.h"
+#include "CGflmDriveResolver.h"
+#include "GFLM.hrh"
+#include "GflmUtils.h"
+#include "GFLMConsts.h"
+
+
+// CONSTANTS
+
+// Granularity of iBackstepStack array
+const TInt KBackstepStackGranularity = 3;
+
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CGflmNavigatorModel::CGflmNavigatorModel
+// C++ default constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+//
+CGflmNavigatorModel::CGflmNavigatorModel( RFs& aFs ) :
+        CGflmFileListModel( aFs )
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmNavigatorModel::ConstructL()
+// Symbian 2nd phase constructor can leave.
+// -----------------------------------------------------------------------------
+//
+void CGflmNavigatorModel::ConstructL()
+    {
+    CGflmFileListModel::ConstructL();
+    iBackstepStack = new( ELeave ) CDesCArraySeg( KBackstepStackGranularity );
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmNavigatorModel::NewL()
+// Two-phased constructor.
+// -----------------------------------------------------------------------------
+//
+EXPORT_C CGflmNavigatorModel* CGflmNavigatorModel::NewL( RFs& aFs )
+    {
+    CGflmNavigatorModel* self = new( ELeave ) CGflmNavigatorModel( aFs );
+
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    CleanupStack::Pop( self );
+
+    return self;
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmNavigatorModel::~CGflmNavigatorModel()
+// -----------------------------------------------------------------------------
+//
+CGflmNavigatorModel::~CGflmNavigatorModel()
+    {
+    delete iBackstepStack;
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmNavigatorModel::GoToDirectoryL()
+// -----------------------------------------------------------------------------
+//
+EXPORT_C void CGflmNavigatorModel::GoToDirectoryL(
+        const TDesC& aPath, TBool aBackstepping )
+    {
+    if ( !aPath.CompareF( CurrentDirectory() ) )
+        {
+        return; // Already in the directory
+        }
+    SetBaseDirectoryL( aPath );
+
+    // Update the backstepping stack after calling SetBaseDirectoryL()
+    // because it might leave
+    if ( !aBackstepping )
+        {
+        iBackstepStack->Reset();
+        }
+    iBackstepStack->AppendL( aPath );
+
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmNavigatorModel::BackstepL()
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+EXPORT_C void CGflmNavigatorModel::BackstepL()
+    {
+    if ( iBackstepStack->MdcaCount() )
+        {
+        iBackstepStack->Delete( iBackstepStack->MdcaCount() - 1 );
+        if ( iBackstepStack->MdcaCount() )
+            {
+            TPtrC dir( iBackstepStack->MdcaPoint(
+                    iBackstepStack->MdcaCount() - 1 ) );
+            SetSourceL( dir );
+            if ( !IsValidSource( dir ) )
+                {
+                User::Leave( KErrPathNotFound );
+                }
+            }
+        else
+            {
+            SetSourceL( KNullDesC );
+            }
+        }
+    else
+        {
+        User::Leave( KErrUnderflow );
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmNavigatorModel::GoToDirectoryL()
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+EXPORT_C void CGflmNavigatorModel::GoToDirectoryL( const TDesC& aBasePath,
+                                                   const TDesC& aTopPath )
+    {
+    // Use copies because descriptors may come from backstep stack itself
+    HBufC* basePathBuffer = aBasePath.AllocLC();
+    TPtrC basePath( basePathBuffer->Des() );
+    HBufC* topPathBuffer = aTopPath.AllocLC();
+    TPtrC topPath( topPathBuffer->Des() );
+    const TInt KNthMatch = 2;
+
+    // Clear the backstepping stack
+    iBackstepStack->Reset();
+
+    // Construct the backstepping stack
+
+    while ( basePath.CompareF( topPath ) )
+        {
+        iBackstepStack->InsertL( 0, topPath );
+
+        // Find the second backslash starting from the end
+        TInt cutPoint( GflmUtils::LocateReverseNth(
+            topPath, KGFLMBackslash()[ 0 ], KNthMatch ) );
+        User::LeaveIfError( cutPoint );
+        topPath.Set( topPath.Left( cutPoint + 1 ) );
+        }
+
+    // Add basepath too
+    iBackstepStack->InsertL( 0, topPath );
+
+    SetBaseDirectoryL( *topPathBuffer );
+
+    CleanupStack::PopAndDestroy( topPathBuffer );
+    CleanupStack::PopAndDestroy( basePathBuffer );
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmNavigatorModel::CurrentDirectory()
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TPtrC CGflmNavigatorModel::CurrentDirectory() const
+    {
+    TInt stackSize( iBackstepStack->MdcaCount() );
+    if ( stackSize <= 0 )
+        {
+        return KNullDesC();
+        }
+    return iBackstepStack->MdcaPoint( stackSize - 1 );
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmNavigatorModel::LocalizedNameOfCurrentDirectory()
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TPtrC CGflmNavigatorModel::LocalizedNameOfCurrentDirectory() const
+    {
+    TInt stackSize( iBackstepStack->MdcaCount() );
+    if ( stackSize <= 0 )
+        {
+        return TPtrC( KNullDesC );
+        }
+    TPtrC directory( iBackstepStack->MdcaPoint( stackSize - 1 ) );
+    TPtrC localizedName( iItemLocalizer->Localize( directory ) );
+    if ( localizedName.Length() )
+        {
+        // Return the localized name
+        return localizedName;
+        }
+    // Directory has no localized name => return the name of the directory
+    TPtrC ptr( GflmUtils::StripFinalBackslash( directory ) );
+    TInt lastBs( ptr.LocateReverse( KGFLMBackslash()[ 0 ] ) );
+    if ( lastBs != KErrNotFound )
+        {
+        return ptr.Mid( lastBs + 1 );
+        }
+    return TPtrC( KNullDesC );
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmNavigatorModel::SetBaseDirectoryL()
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CGflmNavigatorModel::SetBaseDirectoryL( const TDesC& aDirectory )
+    {
+    if ( IsValidSource( aDirectory ) )
+        {
+        SetSourceL( aDirectory );
+        }
+    else
+        {
+        User::Leave( KErrPathNotFound );
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmNavigatorModel::NavigationLevel()
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TInt CGflmNavigatorModel::NavigationLevel() const
+    {
+    return iBackstepStack->Count() - 1;
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmNavigatorModel::CurrentDrive()
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+EXPORT_C CGflmDriveItem* CGflmNavigatorModel::CurrentDrive() const
+    {
+    return DriveFromPath( CurrentDirectory() );
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmNavigatorModel::SetSourceL()
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CGflmNavigatorModel::SetSourceL( const TDesC& aSource )
+    {
+    TBool empty( !aSource.Length() );
+    TInt groupCount( iGroups->Count() );
+    for ( TInt i( 0 ); i < groupCount; i++ )
+        {
+        MGflmItemGroup* group = iGroups->At( i );
+        group->ResetSources();
+        if ( !empty )
+            {
+            group->AddSourceL( aSource );
+            }
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CGflmNavigatorModel::IsValidSource()
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+TBool CGflmNavigatorModel::IsValidSource( const TDesC& aSource ) const
+    {
+    if ( aSource.Length() &&
+        !iDriveResolver->IsRemoteDrive( aSource ) &&
+        !BaflUtils::PathExists( iFs, aSource ) &&
+        !iDriveResolver->IsRootPath( aSource ) )
+        {
+        return EFalse;
+        }
+    return ETrue;
+    }
+
+//  End of File