--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/contentpublishingsrv/contentharvester/contentharvesterswiplugin/inc/chswiusbhandler.h	Tue Jan 26 12:11:15 2010 +0200
@@ -0,0 +1,163 @@
+/*
+* Copyright (c) 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:  
+ *
+*/
+
+#ifndef C_CCHSWIUSBHANDLER_H
+#define C_CCHSWIUSBHANDLER_H
+
+// INCLUDES
+#include <e32std.h>
+#include <e32base.h>
+#include <f32file.h>
+
+
+
+
+// FORWARD DECLARATION
+class MCHSwiMassModeObserver;
+
+
+/*
+ * Inherited CActive, performs a asynchronous checks for mass storage mode
+ *
+ * @since 3.1
+ */
+class CCHSwiUsbHandler : public CActive
+    {
+public:
+	/**
+	 * Two-phased constructor.
+     * @param aPlugin Owning plugin.
+     * @param aFs File session. 
+	 */
+    static CCHSwiUsbHandler* NewL( MCHSwiMassModeObserver* aMassModeObserver,
+    		RFs& aFs );
+
+	/**
+	 * Destructor.
+	 */
+    virtual ~CCHSwiUsbHandler();
+
+    /**
+     * Performs synchronous drive scan. Checks whether Mass Drive is available.
+     * If it available: observer's Mass Mode flag is set to EFalse.
+     * If it is not available: Mass Mode flag is set to ETrue.
+     * In case of error, the check is postponed to be done again in RunL and Mass 
+     * Mode flag is set to ETrue.
+     */
+    void SynchronousDriveScan();
+
+    /**
+     * Performs postponed drive scan. Checks whether Mass Drive is available.
+     * If it available: observer's Mass Mode flag is set to EFalse.
+     * If it is not available: Mass Mode flag is set to ETrue.
+     * In case of error, the check is postponed to be done again in RunL and Mass 
+     * Mode flag is set to ETrue.
+     */
+    void PostponedDriveScan();
+    
+protected:
+
+	/**
+	 * Handles timer events to start drive scan.
+	 */
+    void RunL();
+
+    /**
+     * RunL error handling.
+     * @param aError Error.
+     */
+    TInt RunError( TInt aError );
+
+    /**
+     * Cancels notifications.
+     */
+    void DoCancel();
+
+private:
+
+    /**
+     * no copy constructor
+     */
+    CCHSwiUsbHandler( const CCHSwiUsbHandler& );
+    
+    /**
+     * no assignment
+     */    
+    CCHSwiUsbHandler& operator=( const CCHSwiUsbHandler& );
+
+    /**
+     * C++ default constructor
+     */
+    CCHSwiUsbHandler( MCHSwiMassModeObserver* aMassModeObserver, RFs& aFs );
+
+    /**
+     * Symbian default constructor.
+     */
+    void ConstructL();
+
+    /**
+     * Scans drives to check mass storage mode.
+     */
+    TInt ScanDrives( TInt& aDriveFlags );
+
+    /**
+     * Handles drive access errors by launching new postponed scan.
+     */
+    void HandleDriveError();
+    
+    /**
+     * Scans drives and updates Mass Mode flag in the observer. 
+     * @param aFlagsValid indicates whether current iDriveFlags are valid 
+     * (they become invalid in case of an error).
+     */
+    TInt ScanDrivesAndUpdateFlag( TBool aFlagsValid );
+    
+    /**
+     * Updates mass mode flag in observer.
+     */
+    TInt UpdateMassModeFlag();
+
+private:
+	/**
+	 * Error from last drive scan.
+	 */
+	TInt iLastDriveScanError;
+	
+	/**
+	 * Observer.
+	 */
+	MCHSwiMassModeObserver* iMassModeObserver;
+	
+	/**
+	 * File session. Not owned.
+	 */
+    RFs iFs;
+    
+    /**
+     * Drive flags obtained in last drive scan. Every bit indicates presence 
+     * of given drive. This member is used for drive access optimalization -
+     * if flags are valid (i.e. no error occured)
+     */
+    TInt iDriveFlags;
+    
+    /**
+     * Timer for postponed drive scan.
+     */
+    RTimer iTimer;
+    };
+
+#endif // #ifndef C_CCHSWIUSBHANDLER_H