--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/datasourcemodules/bluetoothgpspositioningmodule/btgpspsy/src/RequestHandler/BTGPSRequestManager.cpp	Fri Jun 04 10:34:15 2010 +0100
@@ -0,0 +1,305 @@
+// Copyright (c) 2005-2009 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:
+//
+
+
+
+// INCLUDE FILES
+#include <e32std.h>
+#include "BTGPSRequestManager.h"
+#include "BTGPSConnectManager.h"
+#include "BTGPSConstantsManager.h"
+#include "BTGPSRequestHandler.h"
+#include "BTGPSFix.h"
+#include "BTGPSNmeaBuffer.h"
+#include "BTGPSNmeaParser.h"
+#include "BTGPSLocationFixListener.h"
+#include "BTGPSLogging.h"
+
+// EXTERNAL DATA STRUCTURES
+
+// EXTERNAL FUNCTION PROTOTYPES  
+
+// CONSTANTS
+//GSV wait time. If GSV sentence is not available, system
+//wait wait this much time before the fix is delivered.
+const TInt KBTGPSGsvWaitTime = 1000000; //1 second
+
+//NMEA sentence terminator
+_LIT8(KBTGPSNmeaTerminator, "\x0d\x0a");
+
+// MACROS
+
+// LOCAL CONSTANTS AND MACROS
+
+// MODULE DATA STRUCTURES
+
+// LOCAL FUNCTION PROTOTYPES
+
+// FORWARD DECLARATIONS
+
+// ============================= LOCAL FUNCTIONS ===============================
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+
+// -----------------------------------------------------------------------------
+// CBTGPSRequestManager::NewL
+// -----------------------------------------------------------------------------
+CBTGPSRequestManager* CBTGPSRequestManager::NewL(
+    CBTGPSConnectManager& aConnectManager,
+    CBTGPSConstantsManager& aConstantsManager)
+    {
+    CBTGPSRequestManager* self = new (ELeave) CBTGPSRequestManager(
+        aConnectManager,
+        aConstantsManager);
+    CleanupStack::PushL(self);
+    self->ConstructL();
+    CleanupStack::Pop();
+    return self;
+    }
+
+// -----------------------------------------------------------------------------
+// CBTGPSRequestManager::~CBTGPSRequestManager
+// -----------------------------------------------------------------------------
+CBTGPSRequestManager::~CBTGPSRequestManager()
+    {
+    if(iTimer!=NULL)
+        {
+        iTimer->Cancel();
+        delete iTimer;
+        }
+        
+    delete iFix;
+    delete iLastFix;
+    iListenerArray.Close();
+    delete iNmeaBuffer;
+    }
+
+// -----------------------------------------------------------------------------
+// CBTGPSRequestManager::ConstructL
+// -----------------------------------------------------------------------------
+void CBTGPSRequestManager::ConstructL()
+    {
+    iNmeaBuffer = CBTGPSNmeaBuffer::NewL(
+        iConstantsManager.iNmeaBufferSize);
+
+    iFix = new (ELeave) CBTGPSFix();
+    iFix->SetNmeaBuffer(iNmeaBuffer);
+    
+    iLastFix = new (ELeave) CBTGPSFix();
+    iTimer = CPeriodic::NewL(CActive::EPriorityStandard);
+    
+    }
+
+// -----------------------------------------------------------------------------
+// CBTGPSRequestManager::CBTGPSRequestManager
+// C++ default constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+CBTGPSRequestManager::CBTGPSRequestManager(
+    CBTGPSConnectManager& aConnectManager,
+    CBTGPSConstantsManager& aConstantsManager)
+    : iConnectManager(aConnectManager),
+      iConstantsManager(aConstantsManager)
+    {
+    iPrevBottom = 0;
+    }
+
+// -----------------------------------------------------------------------------
+// CBTGPSRequestManager::RetrieveFixL
+// -----------------------------------------------------------------------------
+void CBTGPSRequestManager::RetrieveFixL()
+    {
+    if(!iReceivingMessage)
+        {
+        iConnectManager.AddMessageListenerL(*this);
+        iReceivingMessage = ETrue;
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CBTGPSRequestManager::StopRetrievingFix
+// -----------------------------------------------------------------------------
+void CBTGPSRequestManager::StopRetrievingFix()
+    {
+    //For better performance, system handles received message
+    //when device is connected.
+    }
+
+
+// -----------------------------------------------------------------------------
+// CBTGPSRequestManager::HandleMessage
+// -----------------------------------------------------------------------------
+void CBTGPSRequestManager::HandleMessage(const TBTGPSNmeaParser& aParser)
+    {
+    //Add the received message to buffer
+    iNmeaBuffer->AddSentences(aParser.NmeaSentence());
+    //Add 0x0d 0x0a
+    iNmeaBuffer->AddSentences(KBTGPSNmeaTerminator);
+    
+    //Parse the message
+    CBTGPSFix::TParsingStatus err = iFix->ParseMessage(aParser);
+
+    //Check if we have received a valid sentence
+    if(err == CBTGPSFix::EInfoUpdated)
+        {
+        if(iFix->IfFullNmeaPatternReceived())
+            {
+            TTime gsvTime = iFix->GsvTime();
+            TTime now;
+            now.UniversalTime();
+            TRACESTRING2("CBTGPSRequestManager:: Now time = %d", now.Int64())
+            TRACESTRING2("CBTGPSRequestManager:: GSV time = %d", gsvTime.Int64())
+            if(gsvTime!=0 && now.MicroSecondsFrom(gsvTime)< 
+                CBTGPSRequestHandler::ConstantsManager().iSatelliteInfoLifeTime)
+                {
+                //GSV information is still valid, set fix as valid
+                TRACESTRING("CBTGPSRequestManager:: GSV information is still valid")
+                iTimer->Cancel();
+                InformListeners();
+                }
+            else
+                {
+                if(!iTimer->IsActive())
+                    {
+                    //GSV information is not valid, start timer
+                    iTimer->Start(
+                        KBTGPSGsvWaitTime,
+                        KBTGPSGsvWaitTime,
+                        TCallBack(TimerCallback, this));
+                    }
+                }
+            }
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CBTGPSRequestManager::LastLocation
+// -----------------------------------------------------------------------------
+TInt CBTGPSRequestManager::LastLocation(
+            const CBTGPSFix*& aFix,
+            const TTime& aMaxAge,
+            const TBool /*aAcceptPartial*/)
+    {
+    if(aMaxAge.Int64() == 0)
+        {
+        return KErrNotFound;
+        }
+        
+    if(iLastFix->IsFixValid())
+        {
+        if(iLastFix->FixTime()>=aMaxAge)
+            {
+            aFix = iLastFix;
+            return KErrNone;
+            }
+        }
+    return KErrNotFound;
+    }
+
+// -----------------------------------------------------------------------------
+// CBTGPSRequestManager::SystemTimeChange
+// -----------------------------------------------------------------------------
+void CBTGPSRequestManager::SystemTimeChange()
+    {
+    iLastFix->Reset();
+    
+    //Reset GSV time
+    iFix->ResetGSVTime();
+    }
+
+// -----------------------------------------------------------------------------
+// CBTGPSRequestManager::AddListenerL
+// -----------------------------------------------------------------------------
+void CBTGPSRequestManager::AddListenerL(MBTGPSLocationFixListener& aListener)
+    {
+    User::LeaveIfError(iListenerArray.Append(&aListener));
+    }
+        
+// -----------------------------------------------------------------------------
+// CBTGPSRequestManager::RemoveListener
+// -----------------------------------------------------------------------------
+void CBTGPSRequestManager::RemoveListener(MBTGPSLocationFixListener& aListener)
+    {
+    TInt index = iListenerArray.Find(&aListener);
+    if(index!=KErrNotFound)
+        {
+        iListenerArray.Remove(index);
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CBTGPSRequestManager::InformListeners
+// -----------------------------------------------------------------------------
+void CBTGPSRequestManager::InformListeners()
+    {
+    TRACESTRING("CBTGPSRequestManager::InformListeners start...")
+
+    //Inform listeners
+    TInt count = iListenerArray.Count();
+    for(TInt i=count-1; i>=0; i--)
+        {
+        iListenerArray[i]->HandleLocationFixUpdate(*iFix);
+        }
+        
+    //If fix is valid then save it to last fix
+    if(iFix->IsFixValid())
+        {
+        *iLastFix = *iFix;
+        }
+        
+    //Reset fix after listeners are informed.
+    iFix->ResetFix();
+    
+    //Set previous bottom of NMEA buffer
+    iPrevBottom = iNmeaBuffer->CurrentIndex();
+
+    TRACESTRING("CBTGPSRequestManager::InformListeners end")
+    }
+
+// -----------------------------------------------------------------------------
+// CBTGPSRequestManager::GetPreviousNmeaBufferBottom
+// -----------------------------------------------------------------------------
+TInt CBTGPSRequestManager::GetPreviousNmeaBufferBottom() const
+    {
+    return iPrevBottom;
+    }
+
+
+// -----------------------------------------------------------------------------
+// CBTGPSRequestManager::TimerTick
+// -----------------------------------------------------------------------------
+void CBTGPSRequestManager::TimerTick()
+    {
+    //Deliver fix even the satellite information is not valid
+    TRACESTRING("CBTGPSRequestManager::TimerTick GSV information not valid")
+
+    InformListeners();
+    iTimer->Cancel();
+    }
+       
+// -----------------------------------------------------------------------------
+// CBTGPSRequestManager::TimerCallback
+// -----------------------------------------------------------------------------
+TInt CBTGPSRequestManager::TimerCallback(TAny* aAny)
+    {
+    reinterpret_cast<CBTGPSRequestManager*>(aAny)->TimerTick();
+    return KErrNone; //Stop periodic timer
+    }
+
+//  End of File
+
+
+