diff -r ea65f74e6de4 -r 8e5f6eea9c9f ui/commandhandlers/commoncommandhandlers/src/glxcommandhandlerrotate.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ui/commandhandlers/commoncommandhandlers/src/glxcommandhandlerrotate.cpp	Tue Aug 31 15:14:51 2010 +0300
@@ -0,0 +1,202 @@
+/*
+* 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: 
+*
+*/
+
+#include <mpxcollectionpath.h>
+#include <mglxmedialist.h>
+#include <glxcommandfactory.h>
+#include <glxcommandhandlerrotate.h>
+#include <ExifRead.h>
+#include "OstTraceDefinitions.h"
+#ifdef OST_TRACE_COMPILER_IN_USE
+#include "glxcommandhandlerrotateTraces.h"
+#endif
+
+
+GlxCommandHandlerRotate::GlxCommandHandlerRotate()
+    {
+    OstTraceFunctionEntry0( GLXCOMMANDHANDLERROTATE_GLXCOMMANDHANDLERROTATE_ENTRY );
+    OstTraceFunctionExit0( GLXCOMMANDHANDLERROTATE_GLXCOMMANDHANDLERROTATE_EXIT );
+    }
+
+GlxCommandHandlerRotate::~GlxCommandHandlerRotate()
+    {
+    OstTraceFunctionEntry0( DUP1_GLXCOMMANDHANDLERROTATE_GLXCOMMANDHANDLERROTATE_ENTRY );
+    OstTraceFunctionExit0( DUP1_GLXCOMMANDHANDLERROTATE_GLXCOMMANDHANDLERROTATE_EXIT );
+    }
+
+CMPXCommand* GlxCommandHandlerRotate::CreateCommandL(TInt aCommandId,
+        MGlxMediaList& /*aMediaList*/, TBool& aConsume) const
+    {
+    OstTraceFunctionEntry0( GLXCOMMANDHANDLERROTATE_CREATECOMMANDL_ENTRY );
+    Q_UNUSED(aCommandId);
+    Q_UNUSED(aConsume);
+    OstTraceFunctionExit0( GLXCOMMANDHANDLERROTATE_CREATECOMMANDL_EXIT );
+    return NULL;
+    }
+
+void GlxCommandHandlerRotate::DoExecuteCommandL(TInt aCommandId,
+        MGlxMediaList& aMediaList, TBool& aConsume)
+    {
+    OstTraceFunctionEntry0( GLXCOMMANDHANDLERROTATE_DOEXECUTECOMMANDL_ENTRY );
+    Q_UNUSED(aCommandId);
+    Q_UNUSED(aConsume);
+    const TGlxMedia& item = aMediaList.Item(aMediaList.FocusIndex());
+    TFileName uri;
+    uri.Copy(item.Uri());
+    TRAPD(err,RotateImageL(uri));
+    if (err != KErrNone)
+        {
+        OstTrace0( TRACE_NORMAL, GLXCOMMANDHANDLERROTATE_DOEXECUTECOMMANDL, "GlxCommandHandlerRotate::DoExecuteCommandL Exif Update failed" );
+        }
+    OstTraceFunctionExit0( GLXCOMMANDHANDLERROTATE_DOEXECUTECOMMANDL_EXIT );
+    }
+
+void GlxCommandHandlerRotate::RotateImageL(TFileName aFileToBeRotated)
+    {
+    OstTraceFunctionEntry0( GLXCOMMANDHANDLERROTATE_ROTATEIMAGEL_ENTRY );
+    //Start an IFS session
+    //File system 
+    User::LeaveIfError(iFs.Connect());
+    //first initialize the Exif Writer which is responsible for reading and writing the Exif Data
+    //Will leave here itself in cases where the Exif data is absent
+    InitializeExifWriterL(aFileToBeRotated);
+    //read the Orientation tag stored in  the Exif Data
+    TUint16 initialOrientation = ReadImageOrientationL();
+    //as the image is rotated to 90 degrees clockwise calculate the new orientation by adding that angle
+    TUint16 finalOrientation = CalculateFinalOrientationL(initialOrientation);
+    // Set the Final Orientation on the file
+    SetImageOrientationL(finalOrientation);
+    // Clear the sessions acquired
+    DestroyExifWriter();
+    //close the File Session
+    iFs.Close();
+    OstTraceFunctionExit0( GLXCOMMANDHANDLERROTATE_ROTATEIMAGEL_EXIT );
+    }
+
+void GlxCommandHandlerRotate::InitializeExifWriterL(
+        TFileName aFileToBeRotated)
+    {
+    OstTraceFunctionEntry0( GLXCOMMANDHANDLERROTATE_INITIALIZEEXIFWRITERL_ENTRY );
+    User::LeaveIfError(iFileHandle.Open(iFs, aFileToBeRotated, EFileWrite));
+    TInt filesize;
+    User::LeaveIfError(iFileHandle.Size(filesize));
+    iExifData = HBufC8::NewL(filesize);
+    TPtr8 ptr(iExifData->Des());
+    User::LeaveIfError(iFileHandle.Read(ptr));
+    iExifWriter = CExifModify::NewL(*iExifData, CExifModify::EModify,
+            CExifModify::ENoJpegParsing);
+    OstTraceFunctionExit0( GLXCOMMANDHANDLERROTATE_INITIALIZEEXIFWRITERL_EXIT );
+    }
+
+TUint16 GlxCommandHandlerRotate::ReadImageOrientationL()
+{
+	OstTraceFunctionEntry0( GLXCOMMANDHANDLERROTATE_READIMAGEORIENTATIONL_ENTRY );
+	TUint16 initialOrientation;
+	const CExifRead* exifReader = iExifWriter->Reader(); //not owned
+    User::LeaveIfError(exifReader->GetOrientation(initialOrientation));
+	OstTrace1( TRACE_NORMAL, GLXCOMMANDHANDLERROTATE_READIMAGEORIENTATIONL, "GlxCommandHandlerRotate::ReadImageOrientationL;initial orientation=%d", initialOrientation );
+	OstTraceFunctionExit0( GLXCOMMANDHANDLERROTATE_READIMAGEORIENTATIONL_EXIT );
+	return (initialOrientation);
+}
+
+TUint16 GlxCommandHandlerRotate::CalculateFinalOrientationL(
+        TUint16 aInitialOrientation)
+    {
+    OstTraceFunctionEntry0( GLXCOMMANDHANDLERROTATE_CALCULATEFINALORIENTATIONL_ENTRY );
+    /*
+     * possible orientation state with angles for rotation
+     * Possible Angles 0 - 90 - 180 - 270
+     * Possible states 1 - 8 - 3 - 6 without a Flip
+     * Possible states 2 - 7 - 4 - 5 when Flip is on
+     */
+    TUint16 finalOrientation = aInitialOrientation;
+    if (aInitialOrientation > 8)
+        {
+        //invalid orientation passed Leave
+        User::Leave(KErrCorrupt);
+        }
+    TInt rotOffset = 1;
+    TInt isOrientationOdd = aInitialOrientation % 2;
+    TInt initStateIndex = 0;
+    TInt finalStateIndex = 0;
+    //Setting the orientation states for the initial unflipped orientation combinations
+    TInt orientationStateArray[] =
+        {
+        1, 8, 3, 6
+        };
+    //Seting the index for current orientation
+    if (aInitialOrientation < 3)
+        {
+        initStateIndex = 0;
+        }
+    else if (aInitialOrientation >= 3 && aInitialOrientation < 5)
+        {
+        initStateIndex = 2;
+        }
+    else if (aInitialOrientation >= 5 && aInitialOrientation < 7)
+        {
+        initStateIndex = 3;
+        }
+    else if (aInitialOrientation >= 7 && aInitialOrientation <= 8)
+        {
+        initStateIndex = 1;
+        }
+    //Calculating the final orientation using the cyclic orientationStateArray. 
+    //folding final index so that it behaves like a cyclic machine 
+    finalStateIndex = (initStateIndex + rotOffset) % 4;
+    finalOrientation = orientationStateArray[finalStateIndex];
+    //Checking if a Flip was present 
+    if (aInitialOrientation > 4 && isOrientationOdd)
+        {
+        finalOrientation -= 1;
+        }
+    if (aInitialOrientation < 5 && !isOrientationOdd)
+        {
+        finalOrientation += 1;
+        }
+    OstTrace1( TRACE_NORMAL, GLXCOMMANDHANDLERROTATE_CALCULATEFINALORIENTATIONL, "GlxCommandHandlerRotate::CalculateFinalOrientationL;finalOrientation=%d", finalOrientation );
+    OstTraceFunctionExit0( GLXCOMMANDHANDLERROTATE_CALCULATEFINALORIENTATIONL_EXIT );
+    return finalOrientation;
+    }
+
+void GlxCommandHandlerRotate::SetImageOrientationL(TUint16 aFinalOrientation)
+    {
+    OstTraceFunctionEntry0( GLXCOMMANDHANDLERROTATE_SETIMAGEORIENTATIONL_ENTRY );
+    iExifWriter->SetOrientationL(aFinalOrientation);
+    HBufC8* modifiedexifData = NULL;
+    modifiedexifData = iExifWriter->WriteDataL(iExifData->Des());
+    User::LeaveIfError(iFileHandle.Write(0, modifiedexifData->Des()));
+    delete modifiedexifData;
+    OstTraceFunctionExit0( GLXCOMMANDHANDLERROTATE_SETIMAGEORIENTATIONL_EXIT );
+    }
+
+void GlxCommandHandlerRotate::DestroyExifWriter()
+    {
+    OstTraceFunctionEntry0( GLXCOMMANDHANDLERROTATE_DESTROYEXIFWRITER_ENTRY );
+    iFileHandle.Close();
+    if (iExifData != NULL)
+        {
+        delete iExifData;
+        iExifData = NULL;
+        }
+    if (iExifWriter != NULL)
+        {
+        delete iExifWriter;
+        iExifWriter = NULL;
+        }
+    OstTraceFunctionExit0( GLXCOMMANDHANDLERROTATE_DESTROYEXIFWRITER_EXIT );
+    }