diff -r 12af337248b1 -r bd7edf625bdd meetingui/meetingrequestviewers/src/CMRViewersImpl.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/meetingui/meetingrequestviewers/src/CMRViewersImpl.cpp	Wed Sep 01 12:32:31 2010 +0100
@@ -0,0 +1,252 @@
+/*
+* Copyright (c) 2005 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: Implementation for meeting request viewers  
+*
+*/
+
+
+
+// ----------------------------------------------------------------------------
+// INCLUDE FILES
+// ----------------------------------------------------------------------------
+//
+#include "CMRViewersImpl.h"
+#include "ICalUILog.h"
+#include "MRHelpers.h"
+#include "CMRHandler.h"
+#include "MRViewersPanic.h" //panic enums
+#include <coemain.h> //coe env
+#include <bautils.h> //bafl utils
+#include <data_caging_path_literals.hrh> //data caging constants
+#include <f32file.h> //file server session
+#include <CMRMailboxUtils.h>
+
+// CONSTANTS
+/// Unnamed namespace for local definitions
+namespace {
+
+_LIT( KPanicMsg, "CMRViewersImpl" );
+
+void Panic( TPanicCode aReason )
+    {
+    User::Panic( KPanicMsg, aReason );
+    }
+
+_LIT( KResourceFileName,"meetingrequestviewersuires.rsc" );
+
+}  // namespace
+
+// ----------------------------------------------------------------------------
+// MEMBER FUNCTIONS
+// ----------------------------------------------------------------------------
+//
+
+// ----------------------------------------------------------------------------
+// CMRViewersImpl::NewL
+// ----------------------------------------------------------------------------
+//
+CMRViewersImpl* CMRViewersImpl::NewL( TAny* aMtmUid )
+	{
+	CMRViewersImpl* self = new( ELeave ) CMRViewersImpl( aMtmUid );
+	CleanupStack::PushL( self );
+	self->ConstructL();
+	CleanupStack::Pop();
+	return self;
+	}
+
+// ----------------------------------------------------------------------------
+// CMRViewersImpl::CMRViewersImpl
+//
+// Constructor.
+// ----------------------------------------------------------------------------
+//
+CMRViewersImpl::CMRViewersImpl( TAny* aMtmUid )
+    : iEngStatus( ENotReady )
+    {
+    iMtmUid = reinterpret_cast<HBufC8*>( aMtmUid ); // ownership transferred
+    }
+
+// ----------------------------------------------------------------------------
+// CMRViewersImpl::~CMRViewersImpl
+//
+// Destructor.
+// ----------------------------------------------------------------------------
+//
+CMRViewersImpl::~CMRViewersImpl()
+    {
+    LOG("CMRViewersImpl::~CMRViewersImpl");
+    delete iIdleTimer;
+    delete iMtmUid;
+    delete iMRHandler;
+    delete iMRUtils;
+    delete iMRMailboxUtils;    
+
+    if ( iResourceFileOffset )
+    	{
+        CCoeEnv::Static()->DeleteResourceFile( iResourceFileOffset );
+    	}
+
+    LOG("CMRViewersImpl::~CMRViewersImpl -> End");
+    }
+
+// ----------------------------------------------------------------------------
+// CMRViewersImpl::ConstructL
+// ----------------------------------------------------------------------------
+//
+void CMRViewersImpl::ConstructL()
+    {
+    LOG("CMRViewersImpl::ConstructL, loading resource");
+    iResourceFileOffset = MRHelpers::LoadResourceL( KResourceFileName,
+                                                    KDC_RESOURCE_FILES_DIR );	
+    LOG("CMRViewersImpl::ConstructL -> End");
+    }
+
+// ----------------------------------------------------------------------------
+// CMRViewersImpl::ExecuteViewL
+// ----------------------------------------------------------------------------
+//
+TInt CMRViewersImpl::ExecuteViewL(
+    RPointerArray<CCalEntry>& aEntries,
+    const TAgnEntryUiInParams& aInParams,
+    TAgnEntryUiOutParams& aOutParams,
+    MAgnEntryUiCallback& aCallback)
+    {
+    LOG("CMRViewersImpl::ExecuteViewL");
+    TInt returnCode( KErrNone );
+    
+    // check that utils objects (configured to use given sessions) exist:
+    EnsureUtilsExistL( &( aInParams.iCalSession ), aInParams.iMsgSession );
+    
+    // CMRHandler is not reusable, must be re-created each time
+    LOG("CMRViewersImpl::ExecuteViewL, creating iMRHandler");
+    delete iMRHandler;
+    iMRHandler = NULL;
+    iMRHandler = CMRHandler::NewL( aEntries,
+                                   aInParams,
+                                   aOutParams,
+                                   aCallback );
+    iMRHandler->SetHelpContext( *iContext );
+
+    LOG("CMRViewersImpl::ExecuteViewL, executing view");
+    returnCode = iMRHandler->ExecuteViewL();        
+
+    LOG("CMRViewersImpl::ExecuteViewL -> End");
+    return returnCode;
+    }
+
+// ----------------------------------------------------------------------------
+// CMRViewersImpl::SetHelpContext
+// ----------------------------------------------------------------------------
+//
+void CMRViewersImpl::SetHelpContext(
+    const TCoeHelpContext& aContext )
+    {
+	iContext = &aContext;
+    }
+
+// ----------------------------------------------------------------------------
+// CMRViewersImpl::EnsureUtilsExistL
+// Will cause HandleCalEngStatus() callback regardless MR Utils is created
+// or not. It is done that way to ensure that program flow is similar in
+// both cases.
+// ----------------------------------------------------------------------------
+//
+void CMRViewersImpl::EnsureUtilsExistL(
+    CCalSession* aCalSession,
+    CMsvSession* aMsgSession )
+    {
+    // no iMRUtils exist or session has changed so that must re-instantiate
+    if ( !iMRUtils || 
+         aCalSession != iCalSession || 
+         aMsgSession != iMsgSession )
+        {
+        delete iMRUtils;
+        iMRUtils = NULL;
+        LOG("CMRViewersImpl::EnsureUtilsExistL, creating iMRUtils");
+	    iMRUtils = CMRUtilsInternal::NewL( *this,
+	                                       *aCalSession,
+	                                       aMsgSession );
+        }
+    else
+        {
+        delete iIdleTimer;
+        iIdleTimer = NULL;
+        iIdleTimer = CIdle::NewL( CActive::EPriorityIdle );
+        iIdleTimer->Start( TCallBack( HandleEngStatusCheck, this ) );
+        }
+    
+    // no iMRMailboxUtils exists or session has changed
+    if ( !iMRMailboxUtils || aMsgSession != iMsgSession )
+        {        
+        delete iMRMailboxUtils;
+        iMRMailboxUtils = NULL;
+        LOG("CMRViewersImpl::EnsureUtilsExistL, creating iMRMailboxUtils");
+	    iMRMailboxUtils = CMRMailboxUtils::NewL( aMsgSession );
+        }
+        
+    // now set session pointer members to contain current values:
+    iCalSession = aCalSession;
+    iMsgSession = aMsgSession;        
+	}
+
+// ----------------------------------------------------------------------------
+// CMRViewersImpl::HandleEngStatusCheck
+// ----------------------------------------------------------------------------
+//
+TInt CMRViewersImpl::HandleEngStatusCheck( TAny* aThis )
+    {
+    CMRViewersImpl* self = static_cast<CMRViewersImpl*>( aThis );
+    self->HandleCalEngStatus( self->iEngStatus );
+    delete self->iIdleTimer;
+    self->iIdleTimer = NULL;
+    return 0;
+    }
+
+// ----------------------------------------------------------------------------
+// CMRViewersImpl::HandleCalEngStatus
+// ----------------------------------------------------------------------------
+//
+void CMRViewersImpl::HandleCalEngStatus( TMRUtilsCalEngStatus aStatus )
+	{
+	iEngStatus = aStatus;
+    TRAPD( err, DoHandleCalEngStatusL( iEngStatus) );
+    if ( err )
+        {
+        // TODO: handle severe error, no meeting request can be shown,
+        // either show error note and empty viewer or exit viewer.
+        // Notice that in theory status events can be received at any time,
+        // viewer might be already happily running.
+        }
+	}
+		
+// ----------------------------------------------------------------------------
+// CMRViewersImpl::DoHandleCalEngStatusL
+// ----------------------------------------------------------------------------
+//
+void CMRViewersImpl::DoHandleCalEngStatusL( TMRUtilsCalEngStatus aStatus )
+	{
+    LOG("CMRViewersImpl::DoHandleCalEngStatusL");
+	if ( aStatus == MMRUtilsObserver::EAvailable )
+		{
+        iMRHandler->HandleEngReadyL( *iMtmUid, *iMRUtils, *iMRMailboxUtils );
+		}
+    else
+        { // Problem in the cal eng status, handle error
+        LOG("CMRViewersImpl::DoHandleCalEngStatusL, bad cal eng status");
+        User::Leave( KErrGeneral );
+        }
+    LOG("CMRViewersImpl::DoHandleCalEngStatusL -> End");
+	}
+
+// End of file