/*

* Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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:  Handle special load events such as network connection,

*                deal with non-http or non-html requests

*

*/

#ifndef BROWSERLOADOBSERVER_H

#define BROWSERLOADOBSERVER_H

//  INCLUDES

//  FORWARD DECLARATIONS

class MApiProvider;

class CBrowserContentView;

class CBrowserWindow;

// define this macro to log event time, temporary

// #define I__LOG_EVENT_TIME

//  CLASS DECLARATION

/**

*  This observer registers for load events

*/

class CBrowserLoadObserver : public CBase,

                             public MBrCtlLoadEventObserver,

                             public MBrowserDialogsProviderObserver

    {

    public: // Constructors and destructors

        /**

        * Constructor.

        */

        static CBrowserLoadObserver* NewL( MApiProvider& aApiProvider,

                                           CBrowserContentView& aContentView,

                                           CBrowserWindow& aWindow );

        /**

        * Destructor.

        */

        virtual ~CBrowserLoadObserver();

    public:

        enum TBrowserLoadState

            {

            ELoadStateIdle = 0x01,

            // ELoadStateContentStart is not used.

            // If you want to set it from BrowserUi, please note

            // that it's not guarantued that Kimono will send

            // any load event in case the content is already moved to 

            // Download Manager!

            ELoadStateContentStart = 0x02,

            ELoadStateResponseInProgress = 0x04,

            ELoadStateLoadDone = 0x08,

            ELoadStateContentAvailable = 0x10

            };

        enum TBrowserLoadUrlType

            {

            ELoadUrlTypeSavedDeck = 0x01,

            ELoadUrlTypeStartPage,

            ELoadUrlTypeEmbeddedBrowserWithUrl,

            ELoadUrlTypeOther  // for example GotoPane's url, Bookmark

            };

        enum TBrowserLoadStatus

            {

            // these flags are the status of loading a page,

            // can be OR'd for querying, setting

            ELoadStatusFirstChunkArrived = 0x0001 ,

            ELoadStatusContentDisplayed = 0x0002 ,

            ELoadStatusMainError = 0x0004 ,

            ELoadStatusSubError = 0x0008 ,

            ELoadStatusError = ELoadStatusMainError | ELoadStatusSubError,

                // 0x000C , // MainError or SubError

            ELoadStatusTitleAvailable = 0x0010,

            ELoadStatusFirstChunkDisplayed = 0x0020,

            ELoadStatusDone = 0x0040,

            ELoadStatusSecurePage = 0x0080,

            ELoadStatusSecureItemNonSecurePage = 0x0100,

            ELoadStatusAllItemIsSecure = 0x0200,  // !SomeItemsNotSecure

            ELoadStatusSecurePageVisited = 0x0400

            };

    public: // Functions from MBrCtlLoadEventObserver

        /**

        * A load events notification

        * @since 2.8

        * @param aLoadEvent The load event

        * @param aSize Size depends on the event

        * @param aTransactionId The transaction that had this event

        * @return void

        */

        virtual void HandleBrowserLoadEventL(

            TBrCtlDefs::TBrCtlLoadEvent aLoadEvent,

            TUint aSize,

            TUint16 aTransactionId );

    public: // Functions from MBrowserDialogsProviderObserver

        /**

        * Callback function for dialog events.

        */

        void ReportDialogEventL( TInt aType, TInt aFlags = 0 );

    public:  // new functions

        /**

        * Loading must be started with this function by the owner.

        * @since 3.0

        * @param aLoadUrlType What is the url's type?

        *   if url doesn't need to be handled a special way, use ELoadUrlTypeOther

        *   otherwise implement special handling for all the events.

        * @return void

        */

        void DoStartLoad( TBrowserLoadUrlType aLoadUrlType );

        /**

        * Loading must be terminated with this function by the owner.

        * @since 3.0

        * @param aIsCancelled Is user cancelled the fetching operation?

        */

        void DoEndLoad( TBool aIsUserInitiated = EFalse );

        /**

        * Checks loading status against some flags.

        * @param aFlags 

        * @return ETrue only if ALL the aFlags are set

        */

        inline TBool LoadStatus( TUint32 aFlag ) const

            { return ( ( aFlag ) && (( iStatus & ( aFlag )) == ( aFlag ))); }

    protected: // new functions

        /**

        * Default C++ constructor.

        */

        CBrowserLoadObserver( MApiProvider& aApiProvider,

                              CBrowserContentView& aContentView,

                              CBrowserWindow& aWindow );

        /**

        * 2nd phase constructor. Leaves on failure.

        */

        void ConstructL();

    private:  // new functions

        void HandleLoadEventOtherL(

            TBrCtlDefs::TBrCtlLoadEvent aLoadEvent,

            TUint aSize,

            TUint16 aTransactionId );

        inline void SetStatus( TUint32 aFlag )   { iStatus |= aFlag; }

        inline void ClearStatus( TUint32 aFlag ) { iStatus &= ~aFlag; }

        inline void ClearStatus( )               { iStatus = 0; }

        void UpdateSecureIndicatorL();

    private:

        void StateChange( TBrowserLoadState aNextState );

        void NewTitleAvailableL();

        TBool InBrowserContentView();

        void ContentArrivedL();

        inline void SetRestoreContentFlag( TBool aFlag )

            { iRestoreContentFlag = aFlag; }

    public:

        // Get functions

        TBrowserLoadUrlType LoadUrlType() const;

        TBrowserLoadState   LoadState()   const;

        inline TBool ContentDisplayed(){return  iNewContentDisplayed;}

        void SetContentDisplayed( TBool aValue );

    private:  // data members

        MApiProvider        *iApiProvider;  // owner app, not owned

        CBrowserContentView *iContentView;  // contentView, not owned

        CBrowserWindow      *iWindow;

        TBrowserLoadState   iLoadState;

        TBrowserLoadUrlType iLoadUrlType;

        TUint32             iStatus;

        TBool               iRestoreContentFlag;

        TBool               iBrowserInitLoad;

        TBool               iNewContentDisplayed;

        // Large file upload max content

        TUint32             iMaxUploadContent;

#ifdef I__LOG_EVENT_TIME

        TTime               iStartDownloadTime;

        TInt64              iTotalUpdateTime;

        TInt64              iNumberOfUpdates;

#endif

    };

#endif      // BROWSERLOADOBSERVER_H

// End of File