--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/contextframework/cfwplugins/displaysourceplugin/inc/displayservicebase.h	Tue Feb 02 10:12:00 2010 +0200
@@ -0,0 +1,117 @@
+/*
+* Copyright (c) 2009-2009 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:  CDisplayContextBase class declaration.
+*
+*/
+
+
+#ifndef DISPLAYSERVICEBASE_H
+#define DISPLAYSERVICEBASE_H
+
+// SYSTEM INCLUDE FILES
+#include <e32base.h>
+
+// USER INCLUDE FILES
+
+// FORWARD DECLARATIONS
+class CCFContextObject;
+class MCFContextInterface;
+
+// DATA TYPES
+
+// CLASS DECLARATION
+
+/**
+ * Base class for all display type contexts.
+ *
+ * @lib None.
+ * @since S60 5.0
+ */
+NONSHARABLE_CLASS( CDisplayServiceBase ): public CBase
+    {
+public:
+    
+    // Display service type
+    enum TDisplayServiceType
+        {
+        EDisplayLightStatus,
+        EDisplayUILayout
+        };
+    
+    virtual ~CDisplayServiceBase();
+    
+public:
+    
+    /**
+     * Start the display service.
+     * All the contexts must be defined here and also the initial value needs
+     * to be set. This can also be done asynchronously.
+     * 
+     * @since S60 5.0
+     * @param None.
+     * @return None.
+     */
+    virtual void StartL() = 0;
+    
+    /**
+     * Stop the display service.
+     * 
+     * @since S60 5.0
+     * @param None.
+     * @return None.
+     */
+    virtual void Stop() = 0;
+    
+public:
+    
+    /**
+     * Return the display context type.
+     * 
+     * @since S60 5.0
+     * @param None.
+     * @return None.
+     */
+    TInt DisplayServiceType() const;
+    
+protected:
+
+    /**
+     * Default C++ constructor.
+     */
+    CDisplayServiceBase( TDisplayServiceType aType,
+        MCFContextInterface& aCF );
+    
+    /**
+     * Symbian 2nd phase constructor.
+     */
+    void ConstructL();
+
+protected: // Data
+    
+    /** Context associated with the display service */
+    CCFContextObject* iContext;
+    
+    /** Reference to the Context Access API */
+    MCFContextInterface& iCF;
+    
+    /** Handle to the current thread */
+    RThread iThread;
+
+private: // Private data
+    
+    /** Display context type */
+    TDisplayServiceType iType;
+    };
+
+#endif // DISPLAYCONTEXTBASE_H