/*

* 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:  Definition of HistoryController

*

*/

#ifndef HISTORYCONTROLLER_H

#define HISTORYCONTROLLER_H

//  INCLUDES

#include <e32base.h>

#include "HistoryInterface.h"

// CONSTANTS

static const TUint KHistoryStackSize = 20;

// MACROS

// DATA TYPES

enum THistoryStackLocation

{

    EHistoryStackLocationAtBeginning,

    EHistoryStackLocationInMiddle,

    EHistoryStackLocationAtEnd

};

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

class HistoryView;

//typedef CArrayFixFlat<TBrCtlSelectOptionData> SelectArray;

// CLASS DECLARATION

/**

*  This is the entry point for the clients.

*  Call dispatch to have the request processed.

*  @lib resLoader.lib

*  @since 3.1

*/

class HistoryController : public HistoryControllerInterface

    {

    public:  // Constructors and destructor

        static IMPORT_C HistoryControllerInterface* initWithCallback( HistoryCallback* historyCallback,

            bool historyAllowed, bool backListAllowed);

        /**

        * Destructor.

        */

        virtual ~HistoryController();

    public: 

       /**

        * Insert

        * Add Url to History List

        * @since 5.x

        * @return void

        */

        virtual void insert( const TPtrC8& url, const TPtrC8& requestUrl,

            TPtrC& formContentType, WebCore::FormData* formData );

        /**

        * Implements virtual bool ContainsItemForURL(const TDesC& aUrl) = 0;)

        * @return bool

        * Return TRUE if URL request is in the history list

        */

        virtual bool containsItemForURL (const TPtrC& url);

        /**

        * PageInfoLC

        * Return the pageInfo requested, such as page's url or title

        * @since 3.x

        * @return HBufC* - The page information that was requested

        */

        virtual HBufC* pageInfoLC( TBrCtlDefs::TBrCtlPageInfo aBrCtlPageInfo );

        /**

        * HandleHistoryCommandL

        * Handle the commands related to history object

        * @since 3.x

        * @return void

        */

        virtual void handleHistoryCommandL( int command );

        /**

        * ClearHistoryList

        * Clears History List

        * @since 3.x

        * @return void

        */

        virtual void clearHistoryList();

        /**

        * CanGoBackOrForward

        * Check if back/forward is possible

        * @return void

        */

        virtual bool canGoBackOrForward( int distance );

        /**

        * Updates HistoryEntryThumbnail

        *

        */

        virtual void updateHistoryEntryThumbnailL(const CFbsBitmap* bitmap);

        /**

        * Set the title

        *

        */

        virtual void setCurrentEntryTitle( const TPtrC& pageTitle );

        /**

        * CurrentEntryPosition

        * Asks the history controller to update the current entry position

        */

        virtual void updateCurrentEntryPositionIfNeeded();

        /**

        * CurrentEntryPosition

        * Gets the current entry position

        */

        virtual TPoint currentEntryPosition();

        /**

        * CurrentEntryZoomLevel

        * Asks the history controller to update the current entry zoom level

        */

        virtual void updateCurrentEntryZoomLevelIfNeeded();

        /**

        * CurrentEntryZoomLevel

        * Gets the current entry zoom level

        */

        virtual int currentEntryZoomLevel();

        /**

        * CurrentEntryMinZoomLevel

        * Asks the history controller to update the current entry min zoom level

        */

        virtual void updateCurrentEntryMinZoomLevelIfNeeded();

        /**

        * CurrentEntryMinZoomLevel

        * Gets the current entry min zoom level

        */

        virtual int currentEntryMinZoomLevel();

        /**

         * Sets Url request 

         */

        //virtual void setRequestUrlL(const TPtrC& aUrl);

        /**

         * Sets Url Response 

         */

        //virtual void setResponseUrlL(const TPtrC& aUrl);

        /**

         * Gets the entry 

         */

        virtual HistoryEntry* entry (THistoryStackDirection direction);

        /**

         * Gets Url Request 

         */

        virtual TPtrC8 requestUrl();

        /**

        * Returns a pointer to the URL response

        * @return TPtrC to the response

        */

        virtual TPtrC8 responseUrl ();

        /**

        * Returns a pointer to HistoryEntry

        * @return HistoryEntry* to the wml hystory

        */

        virtual HistoryEntry* entryByIndex (int historyIndex);

        /**

         * Gets the index 

         */

        virtual int index (THistoryStackDirection direction);

        /**

        * Delete the entry from the list

        */

        virtual void deleteEntry (int index);

        /**

        * set the current entry

        */

        virtual void setCurrentL ( THistoryStackDirection direction );

        /**

        * Change the time stamp during a reload

        */

        virtual void updateGlobalHistoryForReload ();

        virtual HistoryCallback* historyCallback() { return m_historyCallback;}

        /**

        */

        virtual void setBackListAllowed( bool enabled ) { m_backListAllowed = enabled; }

        /**

        * History View

        * return History View

        */

        HistoryView* historyView() { return m_historyView; }

        /**

        * HistoryStack

        * return the HistoryStack pointer

        */

        RPointerArray<HistoryEntry>* HistoryStack() { return &m_historyStack; }

        /**

        * HistoryLength

        * @return the number of entries in the history list

        */

        int historyLength() const { return m_historyStack.Count(); }

        /**

        * GoBackOrForward

        * Load url from history + or - distance from current page

        * @return void

        */

        virtual void goBackOrForward( int distance );

        /**

        * CloseHistoryView

        * Closes history view

        */

        void closeHistoryView();

        /**

        * HistoryViewEnabled

        * returns true if BrCtl capability fow HistoryView was on

        */

        TBool historyViewEnabled() { return m_historyViewEnabled; }

        void setHistoryViewEnabled( TBool aEnabled ) { m_historyViewEnabled = aEnabled; }

        bool backListAllowed() { return m_backListAllowed; }

        /**

         * Update Display

         */

        void updateDisplay() const;

        int currentIndex() { return m_currentIndex; }

        void setCurrentIndex (int index) { if (index >= 0 && index < m_historyStack.Count()) m_currentIndex = index; }

        void setPossibleWmlOEB(TBool aFlag) { m_possibleWmlOEB = aFlag; }

        TBool possibleWmlOEB() { return m_possibleWmlOEB; }

        void performTransition(int direction);

    private:

        /**

        * Construct.

        * @param

        * @return

        */

        HistoryController(HistoryCallback* historyCallback, bool historyAllowed, bool backListAllowed);

        /**

        * ShowHistoryViewL

        *

        * @since 3.x

        * @return void

        */

        void showHistoryViewL(bool previous);

        /**

        * ShowHistoryListL

        *

        * @since 3.x

        * @return void

        */

        void showHistoryListL();

        /**

        * LoadHistoryEntry

        *

        * @since 3.x

        * @return void

        */

        void loadHistoryEntryL( CArrayFixFlat<TBrCtlSelectOptionData>& aHistoryList );

        void loadHistoryUrl(THistoryStackDirection direction, TBrCtlDefs::TBrCtlCacheMode cacheMode, int historyLoadOffset);

    private:    // Data

        HistoryCallback* m_historyCallback;

        // History Object

        RPointerArray<HistoryEntry> m_historyStack;

        // HistoryView

        HistoryView* m_historyView; // owned

        // denotes the offset if the load was as a result of history offset

        int m_historyLoadOffset;

        int m_currentIndex;

        int m_tempCurrentIndex; // keeps the current index while we do a history load

        // indicates if history view is enabled from BrowserControl capabilities

        bool m_historyViewEnabled;

        // User allows back list

        bool m_backListAllowed;

        // flag to indicate possible OEB when navigating from HTML, back through history, to WML content

        bool m_possibleWmlOEB;

    };

#endif      // HISTORYCONTROLLER_H

// End of File