diff -r d189ee25cf9d -r 3533d4323edc meetingrequest/mrgui/inc/cesmrfieldbuilderinterface.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/meetingrequest/mrgui/inc/cesmrfieldbuilderinterface.h	Wed Sep 01 12:28:57 2010 +0100
@@ -0,0 +1,155 @@
+/*
+* 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:  Definition for GUI extension interface
+*
+*/
+
+
+#ifndef CESMRFIELDBUILDERINTERFACE_H
+#define CESMRFIELDBUILDERINTERFACE_H
+
+#include <ecom/ecom.h>
+
+#include "esmrinternaluid.h"
+#include "mesmrfieldvalidator.h"
+#include "tesmrentryfield.h"
+#include "mesmrresponseobserver.h"
+
+class CESMRField;
+
+/**
+ *  MESMRFieldBuilder is the interface of the field builder composite.
+ *  All field builder implementations will return only this
+ */
+class MESMRFieldBuilder
+    {
+public:
+    /**
+     * Creates editor field.
+     *
+     * @param aValidator - time validator
+     * @param aField - field to be created
+     */
+    virtual CESMRField* CreateEditorFieldL(
+            MESMRFieldValidator* aValidator,
+            TESMREntryField aField ) = 0;
+
+    /**
+     * Creates viewer field.
+     *
+     * @param aResponseObserver - observer to be called when e.g.
+     *                            answer is ready to be sent.
+     * @param aField - field to be created
+     * @param aResponseReady - NOT IN USE
+     */
+    virtual CESMRField* CreateViewerFieldL(
+            MESMRResponseObserver* aResponseObserver,
+            TESMREntryField aField,
+            TBool aResponseReady ) = 0;
+    };
+
+class MESMRBuilderExtension
+    {
+public: // Destruction
+    ~MESMRBuilderExtension() {}
+
+public:
+    /**
+     * Put additional flags/checks here if needed
+     */
+    enum TMRCFSMailBoxCapability
+        {
+        EMRCFSAttendeeStatus = 0,
+        EMRCFSResponseDontSend,
+        EMRCFSRemoveFromCalendar,
+        EMRCFSSupportsAttachmentsInMR
+        };
+
+    /**
+     * Check if a cfsmailboxflag is set
+     */
+    virtual TBool CFSMailBoxCapabilityL( TMRCFSMailBoxCapability aCapa ) = 0;
+
+    /**
+     * Check if a cfsmailboxflag is set
+     */
+    virtual TBool CFSMailBoxCapabilityL(
+            const TDesC& aEmailAddress,
+            TMRCFSMailBoxCapability aCapa ) = 0;
+    
+    /**
+     * Checks, whenter meeting request can be originated or not.
+     * @return ETrue, if MR can be originated, EFalse otherwise.
+     */
+    virtual TBool MRCanBeOriginateedL() = 0;
+    };
+
+/**
+ *  MESMRFieldBuilder is the interface of the field builder composite.
+ *  All field builder implementations will return only this
+ */
+class CESMRFieldBuilderInterface : public CBase
+    {
+public:
+    /**
+     * Create specific implementation
+     */
+    inline static CESMRFieldBuilderInterface* CreatePluginL(
+            TUid aImplementationUid );
+
+    /**
+     * Destructor
+     */
+    inline virtual ~CESMRFieldBuilderInterface();
+
+    /**
+     * return field builder to caller, implemented in all plugins
+     */
+    virtual MESMRFieldBuilder* FieldBuilderL() = 0;
+
+    /**
+     * extends the ecom interface
+     */
+    virtual TAny* ExtensionL( TUid aExtensionUid ) = 0;
+
+private:
+    // The ECom destructor key identifier
+    TUid iDestructorIdKey;
+    };
+
+// -----------------------------------------------------------------------------
+// CESMRFieldBuilderInterface::CreatePluginL
+// -----------------------------------------------------------------------------
+//
+inline CESMRFieldBuilderInterface* CESMRFieldBuilderInterface::CreatePluginL(
+        TUid aImplementationUid )
+    {
+    TAny* implementation =
+        REComSession::CreateImplementationL( aImplementationUid,
+                                             _FOFF( CESMRFieldBuilderInterface,
+                                                    iDestructorIdKey ) );
+    return reinterpret_cast<CESMRFieldBuilderInterface*>(implementation);
+    }
+
+// -----------------------------------------------------------------------------
+// CESMRFieldBuilderInterface::~CESMRFieldBuilderInterface
+// -----------------------------------------------------------------------------
+//
+inline CESMRFieldBuilderInterface::~CESMRFieldBuilderInterface()
+    {
+    REComSession::DestroyedImplementation( iDestructorIdKey );
+    }
+
+
+#endif // CESMRFIELDBUILDERINTERFACE_H