browserui/browser/BrowserAppInc/BrowserLoadObserver.h
author Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
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/*
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* Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  Handle special load events such as network connection,
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*                deal with non-http or non-html requests
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*
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*/
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#ifndef BROWSERLOADOBSERVER_H
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#define BROWSERLOADOBSERVER_H
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//  INCLUDES
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#include <BrCtlInterface.h>
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#include <BrowserDialogsProviderObserver.h>
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//  FORWARD DECLARATIONS
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class MApiProvider;
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class CBrowserContentView;
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class CBrowserWindow;
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// define this macro to log event time, temporary
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// #define I__LOG_EVENT_TIME
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//  CLASS DECLARATION
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/**
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*  This observer registers for load events
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*/
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class CBrowserLoadObserver : public CBase,
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                             public MBrCtlLoadEventObserver,
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                             public MBrowserDialogsProviderObserver
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    {
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    public: // Constructors and destructors
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        /**
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        * Constructor.
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        */
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        static CBrowserLoadObserver* NewL( MApiProvider& aApiProvider,
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                                           CBrowserContentView& aContentView,
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                                           CBrowserWindow& aWindow );
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        /**
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        * Destructor.
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        */
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        virtual ~CBrowserLoadObserver();
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    public:
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        enum TBrowserLoadState
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            {
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            ELoadStateIdle = 0x01,
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            // ELoadStateContentStart is not used.
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            // If you want to set it from BrowserUi, please note
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            // that it's not guarantued that Kimono will send
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            // any load event in case the content is already moved to 
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            // Download Manager!
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            ELoadStateContentStart = 0x02,
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            ELoadStateResponseInProgress = 0x04,
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            ELoadStateLoadDone = 0x08,
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            ELoadStateContentAvailable = 0x10
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            };
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        enum TBrowserLoadUrlType
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            {
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            ELoadUrlTypeSavedDeck = 0x01,
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            ELoadUrlTypeStartPage,
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            ELoadUrlTypeEmbeddedBrowserWithUrl,
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            ELoadUrlTypeOther  // for example GotoPane's url, Bookmark
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            };
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        enum TBrowserLoadStatus
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            {
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            // these flags are the status of loading a page,
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            // can be OR'd for querying, setting
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            ELoadStatusFirstChunkArrived = 0x0001 ,
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            ELoadStatusContentDisplayed = 0x0002 ,
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            ELoadStatusMainError = 0x0004 ,
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            ELoadStatusSubError = 0x0008 ,
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            ELoadStatusError = ELoadStatusMainError | ELoadStatusSubError,
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                // 0x000C , // MainError or SubError
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            ELoadStatusTitleAvailable = 0x0010,
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            ELoadStatusFirstChunkDisplayed = 0x0020,
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            ELoadStatusDone = 0x0040,
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            ELoadStatusSecurePage = 0x0080,
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            ELoadStatusSecureItemNonSecurePage = 0x0100,
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            ELoadStatusAllItemIsSecure = 0x0200,  // !SomeItemsNotSecure
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            ELoadStatusSecurePageVisited = 0x0400
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            };
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    public: // Functions from MBrCtlLoadEventObserver
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        /**
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        * A load events notification
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        * @since 2.8
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        * @param aLoadEvent The load event
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        * @param aSize Size depends on the event
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        * @param aTransactionId The transaction that had this event
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        * @return void
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        */
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        virtual void HandleBrowserLoadEventL(
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            TBrCtlDefs::TBrCtlLoadEvent aLoadEvent,
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            TUint aSize,
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            TUint16 aTransactionId );
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    public: // Functions from MBrowserDialogsProviderObserver
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   118
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        /**
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        * Callback function for dialog events.
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        */
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        void ReportDialogEventL( TInt aType, TInt aFlags = 0 );
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   123
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    public:  // new functions
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        /**
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        * Loading must be started with this function by the owner.
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        * @since 3.0
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        * @param aLoadUrlType What is the url's type?
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        *   if url doesn't need to be handled a special way, use ELoadUrlTypeOther
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        *   otherwise implement special handling for all the events.
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        * @return void
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        */
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        void DoStartLoad( TBrowserLoadUrlType aLoadUrlType );
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   135
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        /**
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        * Loading must be terminated with this function by the owner.
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        * @since 3.0
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        * @param aIsCancelled Is user cancelled the fetching operation?
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        */
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        void DoEndLoad( TBool aIsUserInitiated = EFalse );
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   142
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        /**
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        * Checks loading status against some flags.
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        * @param aFlags 
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        * @return ETrue only if ALL the aFlags are set
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        */
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        inline TBool LoadStatus( TUint32 aFlag ) const
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            { return ( ( aFlag ) && (( iStatus & ( aFlag )) == ( aFlag ))); }
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    protected: // new functions
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        /**
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        * Default C++ constructor.
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        */
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        CBrowserLoadObserver( MApiProvider& aApiProvider,
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                              CBrowserContentView& aContentView,
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                              CBrowserWindow& aWindow );
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   159
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        /**
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        * 2nd phase constructor. Leaves on failure.
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        */
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        void ConstructL();
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    private:  // new functions
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        void HandleLoadEventOtherL(
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            TBrCtlDefs::TBrCtlLoadEvent aLoadEvent,
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            TUint aSize,
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            TUint16 aTransactionId );
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   171
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        inline void SetStatus( TUint32 aFlag )   { iStatus |= aFlag; }
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        inline void ClearStatus( TUint32 aFlag ) { iStatus &= ~aFlag; }
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        inline void ClearStatus( )               { iStatus = 0; }
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        void UpdateSecureIndicatorL();
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    private:
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        void StateChange( TBrowserLoadState aNextState );
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        void NewTitleAvailableL();
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        TBool InBrowserContentView();
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        void ContentArrivedL();
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        inline void SetRestoreContentFlag( TBool aFlag )
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            { iRestoreContentFlag = aFlag; }
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    public:
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        // Get functions
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        TBrowserLoadUrlType LoadUrlType() const;
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        TBrowserLoadState   LoadState()   const;
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        inline TBool ContentDisplayed(){return  iNewContentDisplayed;}
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        void SetContentDisplayed( TBool aValue );
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    private:  // data members
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        MApiProvider        *iApiProvider;  // owner app, not owned
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        CBrowserContentView *iContentView;  // contentView, not owned
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        CBrowserWindow      *iWindow;
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        TBrowserLoadState   iLoadState;
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        TBrowserLoadUrlType iLoadUrlType;
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        TUint32             iStatus;
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        TBool               iRestoreContentFlag;
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        TBool               iBrowserInitLoad;
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        TBool               iNewContentDisplayed;
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        // Large file upload max content
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        TUint32             iMaxUploadContent;
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#ifdef I__LOG_EVENT_TIME
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        TTime               iStartDownloadTime;
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        TInt64              iTotalUpdateTime;
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        TInt64              iNumberOfUpdates;
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#endif
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    };
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#endif      // BROWSERLOADOBSERVER_H
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// End of File