diff -r 000000000000 -r c53acadfccc6 harvester/composerplugins/imagecomposer/inc/imagecomposerao.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/harvester/composerplugins/imagecomposer/inc/imagecomposerao.h	Mon Jan 18 20:34:07 2010 +0200
@@ -0,0 +1,272 @@
+/*
+* Copyright (c) 2006-2009 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:  Composer image active object
+*
+*/
+
+
+#include <e32msgqueue.h>
+
+#include "mdeobject.h"
+#include "mdeobjectquery.h"
+#include "harvesterexifutil.h"
+#include "mdeharvestersession.h"
+
+#ifndef __CIMAGECOMPOSERAO_H__
+#define __CIMAGECOMPOSERAO_H__
+
+_LIT( KImageComposerPanic, "CImageComposerAO" );
+
+class CMdERelationQuery;
+
+class CImageComposerAO : public CActive, public MMdEQueryObserver
+    {
+    public:
+    
+        enum TRequestType
+            {
+            ERequestReady = 0,
+            ERequestGetObject,
+            ERequestCompose
+            };
+
+        /**
+        * Construction
+        */
+        static CImageComposerAO* NewL();
+
+        /**
+        * Destruction
+        */
+        virtual ~CImageComposerAO();
+        
+        /**
+         * Adds new item to composing queue.
+         * @param aItems  Items to add to the queue.
+         * @param aForce  Force composing to items in aItems array
+         */
+        void AddToQueue( const RArray<TItemId>& aItems, TBool aForce );
+
+        /**
+         * Checks if composing is completed.
+         * @return ETrue, if complete.
+         */
+        TBool IsComposingComplete();
+
+        /**
+         * Sets mde client session to be used by this composer.
+         * @param aSession  Mde client session.
+         */
+        void SetSession( CMdESession* aSession );
+        
+        /**
+         * Remove MdE client session used by this composer.
+         */
+        void RemoveSession();
+        
+        /**
+         * Writes location data to Exif.
+         * @param aMdeObject  Mde object of the image.
+         * @param aLocationObject  Related mde location object.
+         */
+        void DoWriteExifL( CMdEObject* aMdEObject, CMdEObject* aLocationObject );
+        
+        
+        
+        
+        
+    public: // from MMdEQueryObserver
+
+	    /**
+	     * Callback to handle new results received from a query.
+	     * From MMdEQueryObserver.
+	     */
+        virtual void HandleQueryNewResults( CMdEQuery& aQuery, TInt aFirstNewItemIndex,
+            TInt aNewItemCount );
+
+	    /**
+	     * Callback to handle new results received from a query.
+	     * From MMdEQueryObserver.
+	     */
+        virtual void HandleQueryNewResults( CMdEQuery& aQuery, TInt aNewObjectItemCount, 
+            TInt aNewRelationItemCount, TInt aNewEventItemCount );
+
+	    /**
+	     * Callback to handle all results of a completed query.
+	     * From MMdEQueryObserver.
+	     * @param aQuery  Completed query
+	     * @param aError  Error code, KErrNone on success.
+	     */
+        virtual void HandleQueryCompleted( CMdEQuery& aQuery, TInt aError );
+
+    protected:
+
+    	/**
+    	 * RunL
+    	 * From CActive.
+    	 */
+        virtual void RunL();
+
+    	/**
+    	 * DoCancel
+    	 * From CActive.
+    	 */
+        virtual void DoCancel();
+
+    	/**
+    	 * RunError. Error handler in case RunL() leaves.
+    	 * From CActive.
+    	 * @param aError  Leave code from RunL.
+    	 * @return  Error code. KErrNone if error was handled.
+    	 */
+        virtual TInt RunError( TInt aError );
+
+    private:
+
+        /**
+        * Private constructor
+        */    
+        CImageComposerAO();
+        
+        /**
+        * 2nd phase construction
+        */    
+        void ConstructL(); // second-phase constructor
+        
+        /**
+         * Gets an object from MdE DB.
+         * Leave on queue errors.
+         * Leaves with KErrNotFound, if object is not found.
+         * 
+         * @param Returned value of current composing request's object ID. 
+         *        Value is changed when item is read from composing queue.
+         */
+        void GetObjectFromMdeL(TItemId& aMdEObjectId);
+        
+        /**
+         * Writes (=composes) new metadata to a image file.
+         */
+        void ComposeL();
+        
+        /**
+         * SetNextRequest
+         * Sets next state for this active object's RunL.
+         * @param aNextRequest  State to set.
+         */
+        void SetNextRequest( TRequestType aNextRequest );
+        
+        /**
+         * @brief Starts the write of GPS tags to a image file.
+         * 
+         * Starts a query to search for related location data in mde.
+         * If found, HandleQueryCompleted will start adding found info
+         * to image file.
+         * 
+         * @param aObjectId  Object to whichs add GPS tags.
+         * 
+         * @see HandleQueryCompleted
+         * @see StartWritingGPSTagsL
+         * @see DoWriteExifL
+         */
+        void WriteGPSTagsL( TItemId aObjectId );
+        
+        /**
+         * Checks if given mime type is JPEG image.
+         * @param aMimeType  a mime type string.
+         * @return ETrue if mime type is image/jpeg.
+         */
+        static TBool IsJpeg( const TDesC& aMimeType );
+        
+        
+        /**
+         * Starts writing GPS tags to image file.
+         * @param aQuery  Mde query which contains results for related
+         *                location object query.
+         */
+        void StartWritingGPSTagsL( CMdEQuery& aQuery );
+
+        /**
+         * Converts a TDateTime object's date to a Exif GPS date string.
+         *
+         * @param aTime  TDateTime object to extract the date from.
+         * @param aTgtDes  Target descriptor for the string.
+         */
+        void TimeToGpsDateStringL( TTime aTime, TDes& aTgtDes );
+
+        /**
+         * Converts a TTime object's time to a Exif GPS time string.
+         *
+         * @param aTime  TDateTime object to extract the time from.
+         * @param aTgtDes  Target descriptor for the string.
+         */
+        void TimeToGpsTimeStringL( TDateTime aTime, TDes8& aTgtDes );
+
+
+        /**
+         * CompareItemIds
+         */
+		static TInt CompareTItemIds( const TItemId& aLeft, const TItemId& aRight )
+			{
+			return aLeft - aRight;
+			}
+
+    private:
+
+    	/** Pointer to a mde object */
+        CMdEObject* iMdeObject;
+        
+        /** Pointer to mde session to use */
+        CMdESession* iSession;
+        
+        CMdEHarvesterSession* iMdEHarvesterSession;
+        
+        /** Next state of this active object's RunL() */
+        TRequestType iNextRequest;
+        
+        /** Queue of items to compose */
+        RArray<TItemId> iItemQueue;
+        
+        /** A relation query used to seach for related location objects */
+        CMdERelationQuery* iRelationQuery;
+        
+        /** Mde default namespace. NOT OWN. */
+        CMdENamespaceDef* iDefaultNamespace;
+        
+        /** Image Object Def. NOT OWN. */
+        CMdEObjectDef* iImageObjectDef;
+
+        /** "Base" Object Def. NOT OWN. */
+        CMdEObjectDef* iObjectDef;
+
+        /** Location Object Def. NOT OWN. */
+        CMdEObjectDef* iLocationObjectDef;
+        
+        /**
+         * Array used to skip new coming id after explicit change of
+         * MdE object in composer.
+         */
+        RArray<TItemId> iNextItemsSkip;
+        
+        /**
+         * Array of item id's which will be forced to be composed
+         * No timestamp checking will be done for these objects
+         */
+        RArray<TItemId> iForceObjectIds;
+        
+        CHarvesterExifUtil* iExifUtil;
+        
+        RFs iFs;
+    };
+
+#endif // __CIMAGECOMPOSERAO_H__