--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javaextensions/location/position/src/ctrackingpositioner.cpp	Tue Apr 27 16:30:29 2010 +0300
@@ -0,0 +1,305 @@
+/*
+* Copyright (c) 2008 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:  Handles position requests with LocationListener
+ *
+*/
+
+
+// INCLUDE FILES
+#include "ctrackingpositioner.h"
+#include "ctimeouttimer.h"
+#include "logger.h"
+
+using namespace java::location;
+
+// UNNAMED LOCAL NAMESPACE
+namespace
+{
+// Terminal multiplier = 1.25 (divided by 1000)
+const TInt KIntervalTerminal = 1250;
+// Network multiplier = 4.0 (divided by 1000)
+const TInt KIntervalNetwork = 4000;
+// Timeout is never less than 1 sec
+const TInt KMinTimeout = 1000000;
+}
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CTrackingPositioner::CTrackingPositioner
+// C++ default constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+//
+CTrackingPositioner::CTrackingPositioner(
+    LocationFunctionServer* aFunctionSource) :
+        CPositionerBase(aFunctionSource)
+{
+}
+
+// -----------------------------------------------------------------------------
+// CTrackingPositioner::ConstructL
+// Symbian 2nd phase constructor can leave.
+// -----------------------------------------------------------------------------
+//
+void CTrackingPositioner::ConstructL(RPositionServer& aServer,
+                                     TPositionModuleId aModuleId,
+                                     TPositionModuleInfo::TCapabilities aCapabilities)
+{
+    JELOG2(EJavaLocation);
+    BaseConstructL(aServer, aModuleId, aCapabilities);
+    // Must use own timer for timeouts due to different behavior of timeouts in MLFW
+    iTimer = CTimeoutTimer::NewL(TCallBack(&StaticCallBack, this));
+}
+
+// -----------------------------------------------------------------------------
+// CTrackingPositioner::NewL
+// Two-phased constructor.
+// -----------------------------------------------------------------------------
+//
+CTrackingPositioner* CTrackingPositioner::NewL(
+    LocationFunctionServer* aFunctionSource, RPositionServer& aServer,
+    TPositionModuleId aModuleId,
+    TPositionModuleInfo::TCapabilities aCapabilities)
+{
+    JELOG2(EJavaLocation);
+    CTrackingPositioner* self =
+        new(ELeave) CTrackingPositioner(aFunctionSource);
+
+    CleanupStack::PushL(self);
+    self->ConstructL(aServer, aModuleId, aCapabilities);
+    CleanupStack::Pop(self);
+
+    return self;
+}
+
+// Destructor
+CTrackingPositioner::~CTrackingPositioner()
+{
+    JELOG2(EJavaLocation);
+    Cancel();
+    delete iTimer;
+}
+
+// -----------------------------------------------------------------------------
+// CTrackingPositioner::StartTracking
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+TInt CTrackingPositioner::StartTracking(TInt aInterval, TInt aTimeout,
+                                        TInt aMaxAge)
+{
+    JELOG2(EJavaLocation);
+    mJni = mFunctionServer->getValidJniEnv();
+    mPeer = mFunctionServer->getPeer();
+
+    jclass peerClass = (*mJni).GetObjectClass(mPeer);
+
+    //Get Method ID of Azimuth Data Callback
+    mLocationUpdatedMethod = mJni->GetMethodID(peerClass, "complete", "(I)V");
+
+    //Check if all the JNI inits have succeeded
+    if (NULL == mLocationUpdatedMethod)
+    {
+        return KErrGeneral;
+    }
+
+    TInt64 maxAge = 0;
+    TPositionUpdateOptions updateOptions;
+
+    iPositioner.SetUpdateOptions(updateOptions);
+
+    if (aInterval > 0)
+    {
+        iInterval = MAKE_TINT64(0, aInterval) * 1000000;
+        iTimeout = (aTimeout > 0) ? MAKE_TINT64(0, aTimeout) * 1000000 : Min(
+                       iTimeToFix * 2, iInterval);
+
+        // Subtract 1 so that maxage is always smaller than interval
+        maxAge = (aMaxAge > 0) ? MAKE_TINT64(0, aMaxAge) * 1000000 - 1
+                 : iInterval / 2;
+    }
+    else
+    {
+        // Default interval = time to fix * factor
+        // (different for network and terminal based modules)
+        const TInt factor = iNetworkBased ? KIntervalNetwork
+                            : KIntervalTerminal;
+        iInterval = (iTimeToFix * factor) / 1000;
+
+        iTimeout = Min(iTimeToFix * 2, iInterval);
+        maxAge = iInterval / 2;
+    }
+
+    iTimeout = Max(iTimeout, KMinTimeout);
+    updateOptions.SetUpdateInterval(TTimeIntervalMicroSeconds(iInterval));
+    updateOptions.SetMaxUpdateAge(TTimeIntervalMicroSeconds(maxAge));
+
+    TInt err = iPositioner.SetUpdateOptions(updateOptions);
+    if (err == KErrNone)
+    {
+        UpdatePosition();
+
+        // Must use own timer due to different behavior of timeouts in MLFW
+        iTimer->TimeoutAfter(TTimeIntervalMicroSeconds(iInterval));
+    }
+
+    return err;
+}
+
+// -----------------------------------------------------------------------------
+// CTrackingPositioner::StopTracking
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CTrackingPositioner::StopTracking()
+{
+    JELOG2(EJavaLocation);
+    iTimer->Cancel();
+    Cancel();
+}
+
+// -----------------------------------------------------------------------------
+// CTrackingPositioner::SetDefaultValues
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CTrackingPositioner::SetDefaultValues(
+    const TTimeIntervalMicroSeconds& aTimeToFix, TBool aNetworkBased)
+{
+    JELOG2(EJavaLocation);
+    iTimeToFix = aTimeToFix.Int64();
+    iNetworkBased = aNetworkBased;
+}
+
+// -----------------------------------------------------------------------------
+// CTrackingPositioner::RunL
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CTrackingPositioner::RunL()
+{
+    JELOG2(EJavaLocation);
+
+    TInt err = iStatus.Int();
+
+    switch (err)
+    {
+    case KErrNone:
+    {
+        iTimer->Cancel();
+
+        mJni = mFunctionServer->getValidJniEnv();
+        mPeer = mFunctionServer->getPeer();
+
+        (*mJni).CallVoidMethod(mPeer, mLocationUpdatedMethod, err);
+
+        UpdatePosition();
+        iTimer->TimeoutAfter(iInterval + iTimeout);
+        break;
+    }
+    case KErrOverflow: // Fallthrough
+    case KErrPositionBufferOverflow:
+    {
+        iTimer->Cancel();
+        // CPositionerBase handles buffer size errors
+        HandleBufferSizeErrorL(err);
+        // Buffer increased successfully. Make a new request
+        UpdatePosition();
+        // Set time out timer since tracking must not be stopped
+        // in any case if the listener has been set from Java-side
+        iTimer->TimeoutAfter(iInterval + iTimeout);
+        break;
+    }
+    default:
+    {
+        // Do not handle other error situations. Time out will take
+        // care if the location request didn't succeed
+        break;
+    }
+    }
+}
+
+// -----------------------------------------------------------------------------
+// CTrackingPositioner::DoCancel
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CTrackingPositioner::DoCancel()
+{
+    JELOG2(EJavaLocation);
+    iPositioner.CancelRequest(EPositionerNotifyPositionUpdate);
+}
+
+// -----------------------------------------------------------------------------
+// CTrackingPositioner::RunError
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+TInt CTrackingPositioner::RunError(TInt aError)
+{
+    JELOG2(EJavaLocation);
+    mJni = mFunctionServer->getValidJniEnv();
+    mPeer = mFunctionServer->getPeer();
+
+    (*mJni).CallVoidMethod(mPeer, mLocationUpdatedMethod, aError);
+
+    iTimer->TimeoutAfter(iInterval);
+    // RunL caused a leave, but we still have to acquire next location fix
+    // even though it will propably fail. Just try to keep tracking
+    if (!IsActive())
+    {
+        // Last position update failed, request a new position
+        UpdatePosition();
+    }
+    return KErrNone;
+}
+
+// -----------------------------------------------------------------------------
+// CTrackingPositioner::CallBack
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CTrackingPositioner::CallBack()
+{
+    JELOG2(EJavaLocation);
+    mJni = mFunctionServer->getValidJniEnv();
+    mPeer = mFunctionServer->getPeer();
+
+    (*mJni).CallVoidMethod(mPeer, mLocationUpdatedMethod, KErrTimedOut);
+
+    iTimer->TimeoutAfter(iInterval);
+
+    if (!IsActive())
+    {
+        // Last position update failed, request a new position
+        UpdatePosition();
+    }
+}
+
+// -----------------------------------------------------------------------------
+// CTrackingPositioner::StaticCallBack
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+TInt CTrackingPositioner::StaticCallBack(TAny* aTrackingPositioner)
+{
+    JELOG2(EJavaLocation);
+    CTrackingPositioner* positioner =
+        reinterpret_cast<CTrackingPositioner*>(aTrackingPositioner);
+    positioner->CallBack();
+    return KErrNone;
+}
+
+//  End of File