/*

* Copyright (c) 2002 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: 

*      Declaration of class CBrowserFavouritesView.

*      

*

*/

#ifndef BROWSER_FAVOURITES_VIEW_H

#define BROWSER_FAVOURITES_VIEW_H

// INCLUDE FILES

#include <eiklbo.h>

#include "BrowserFavouritesModelObserver.h"

#include "BrowserAppViewBase.h"

#include "CommandVisibility.h"

#include "CommsModel.h"

#include "BrowserFavouritesModel.h"

#include <favouriteslimits.h>

// FORWARD DECLARATION

class CFavouritesItemList;

class CBrowserFavouritesContainer;

class CBrowserFavouritesModel;

class CBrowserFavouritesIncrementalOp;

class CBrowserFavouritesListboxState;

// CLASS DECLARATION

/**

* Base class for Bookmarks View and Saved Decks View of the WML Browser.

* The common behaviour of these views is collected here. This includes:

* Handling view activation / decativation;

* Interpreting (common) commands;

* Providing context-specific menus.

* Pure virtual; derived classes must provide model and control components

* and items to display. A number of methods can be overridden.

*/

class CBrowserFavouritesView:public CBrowserViewBase,

                             public MEikListBoxObserver,

                             public MBrowserFavouritesModelObserver,

                             public MCommsModelObserver

	{

	public:     // construction

        /**

        * Destructor.

        */

        virtual ~CBrowserFavouritesView();

	public:     // From MCbaSetter (CBrowserViewBase)

        /**

        * Return command set id, to be displayed.

		* @since 1.2

        * @return The command set's resource id.

        */

        virtual TInt CommandSetResourceIdL();

		/**

		* Set command set lsk,rsk,msk dynamically via pointers.

		* Derived classes should implement, though it can be empty.

		* If it does nothing, empty softkeys will be assigned

		* @since 5.0

		*/

		void CommandSetResourceDynL(TSKPair& /*lsk*/, TSKPair& /*rsk*/, TSKPair& /*msk*/) {};

        /**

        * Return the resource ID of the seamless folder.

		* @param aContextID Context ID of the seamless folder.

        * @return The resource ID of the seamless folder or zero if it is not

        * seamless.

        */

        static TInt GetSeamlessFolderResourceID( TInt aContextID );

        /**

        * Return the resource ID of the seamless folder title.

		* @param aContextID Context ID of the seamless folder.

        * @return The resource ID of the seamless folder title or zero if it is not

        * seamless.

        */

        static TInt GetSeamlessFolderTitleResourceID( TInt aContextID );

        /**

        * Examines if the given ID is an ID of a seamless folder.

		* @param aContextID Context ID of the folder.

        * @return The ETrue if the given ID is a seamless ID otherwise EFalse.

        * seamless.

        */

        static TBool IsSeamlessFolder( TInt aContextID );

        /**

        * Configure Context Menu Resource

        *

        *   context-sensitive menu when item(s) marked

        */

        void ConfigContextMenu();

	public:		// public methods from CAknView (CBrowserViewBase)

        /**

        * Handle command.

		* @since 1.2

        * @param aCommand Command id.

        */

		virtual void HandleCommandL( TInt aCommand );

        /**

        * Get view id. Derived classes must provide this method.

        * @return The view id for this view.

        */

		virtual TUid Id() const = 0;

        void OpenFixedFolderL(TInt aUid);

	protected :

		// For Adaptive bookmarks folder navigation, used in Bookmarks View

		void SetRootFolderForAdaptiveBookmarks();

	protected :	// construction

        /**

        * Constructor.

        * @param aApiProvider The API provider.

        */

		CBrowserFavouritesView( MApiProvider& aApiProvider, TInt aInitialFolderId = KFavouritesRootUid );

        /**

        * Second phase constructor. Leaves on failure.

        * @param aViewResourceId Resource id for this view.

        * Derived classes should call this first during construction.

        */

		void ConstructL( TInt aViewResourceId );

    protected:  // menu initialization

        /**

        * Initialize context-sensitive menu.

        * @param aResourceId Resource id of the menu pane.

        * @param aMenuPane Menu pane object being initialized.

        * @param aIndex Index into the visibility map.

        * @param aState Selection state.

        */

        virtual void DynInitMenuPaneL

                (

                TInt aResourceId,

                CEikMenuPane* aMenuPane,

                TCommandVisibility::TIndex aIndex,

                const TBrowserFavouritesSelectionState& aState

                ) = 0;

    protected:  // new methods

        /**

        * Get resource id of text to be displayed in navi pane when

        * root folder is shown (TBUF).

        * Derived classes must provide this method.

		* @since 1.2

        * @return Resource id.

        */

        virtual TInt RootTitleResourceId() const = 0;

        /**

        * Get resource id of Options menu (RESOURCE MENU_BAR).

        * Derived classes must provide this method.

		* @since 1.2

        * @return Resource id.

        */

        virtual TInt OptionsMenuResourceId() const = 0;

        /**

        * Get resource id of OK-Options menu (RESOURCE MENU_BAR).

        * Derived classes must provide this method.

		* @since 1.2

        * @return Resource id.

        */

        virtual TInt OkOptionsMenuResourceId() const = 0;

    protected:  // component creation

        /**

        * Create the model. Leave on failure. The model is owned by the

        * caller (this view).

        * Derived classes must provide this method.

        * @return The constructed model.

        */

        virtual CBrowserFavouritesModel* CreateModelL() = 0;

        /**

        * Create the container (the main control of the view). The container

        * is owned by the caller (this view).

        * Leave on failure.

        * Derived classes must provide this method.

        * @return The constructed main control.

        */

        virtual CBrowserFavouritesContainer* CreateContainerL() = 0;

    protected: // data retrieval

        /**

        * Get items to be displayed in a folder. Expects the model's db be

        * open.

        * @param aFolder Folder which contains the items.

        * @return List of items. Pushed on the cleanup stack.

        */

        virtual CFavouritesItemList* GetItemsLC( TInt aFolder );

	public:

        /**

        * Get the model.

        * @return The model.

        */

        inline CBrowserFavouritesModel& Model() const;

        inline void ShowNextFolerL(TBool aNext) { OpenNextFolderL(aNext); }

    protected:  // component retrieval

        /**

        * Get the container (the view's main control).

        * @return The container. Can be NULL (when view is not activated,

        * container does not exist).

        */

        inline CBrowserFavouritesContainer* Container() const;

        /**

        * Get Uid of the folder shown.

        * @return Current folder's Uid.

        */

        inline TInt CurrentFolder() const;

    protected:  // new methods

        /**

        * If there is a preferred highlight uid, attempt to highlight that.

        * If succeeded, preferred highlight uid is cleared ("used up").

        * Otherwise do nothing.

        */

        void HighlightPreferredL();

        /**

        * Some displayed data has changed (Favourites database, AP-s, etc).

        * Update the view so changes become visible. Safe to call if the view

        * is not active; in this case it does nothing.

        * This method should not be called if the data change is due to direct

        * user activity (opening folders etc.); only for notification

        * processing.

        * @param aDbErrorNote If ETrue, unsuccesful database access will bring

        * up an error note.

        */

        virtual void RefreshL( TBool aDbErrorNote = EFalse );

		/**

        * Redraw.

        */

        void HandleClientRectChange();

	protected:	// from CAknView

        /**

        * Activate the view. Open the database. If it was activated

        * previously, try to restore the view as it was before deactivation.

        * @param aPrevViewId Previous View Id.

        * @param aCustomMessageId Custom Message Id.

        * @param aCustomMessage Custom Message.

        */

        void DoActivateL

            (

            const TVwsViewId& aPrevViewId,

            TUid aCustomMessageId,

            const TDesC8& aCustomMessage

            );

        /**

        * Deactivate the view. Close the database. Save the view state,

        * so it can be restored on future activations.

        */

        void DoDeactivate();

        /**

        * Initialize context-sensitive menu. Do not override this one;

        * override the other.

        * @param aResourceId Resource id of the menu pane.

        * @param aMenuPane Menu pane object being initialized.

        */

        void DynInitMenuPaneL

            ( TInt aResourceId, CEikMenuPane* aMenuPane );

        /**

        * Handle foreground event.

        * @param aForeground ETrue if foreground.

        */

    protected:	// from MEikListBoxObserver

        /**

        * Handle listbox event.

        * @param aListBox Listbox in which the event occurred.

        * @param aEventType Event.

        */

        virtual void HandleListBoxEventL

			( CEikListBox* aListBox, 

			MEikListBoxObserver::TListBoxEvent aEventType );

    private:    // command handling

        /**

        * Command "Back", when showing a folder. Open the parent folder.

        * of the currently shown folder. Highlight the folder just closed.

        */

        void CloseCurrentFolderL();

        /**

        * Command "Open (folder)". Open the highlighted folder.

        * Does nothing if no folder is highlighted.

        */

        void OpenCurrentFolderL();

        /**

        * Command "Open (folder)" from OK-Options menu. Open the marked folder.

        * Does nothing if no folder is marked or more is marked.

        */

        void OpenMarkedFolderL();

        /**

        * Command "Remove" or "Erase". Delete marked item(s).

        * Does nothing if no item is highlighted / marked.

        */

        virtual void DeleteMarkedItemsL();

    protected:

        /**

        * Command "New folder". New folders are alwas created in the root

        * folder.

        * @return The uid of the newly created folder, or KFavouritesNullUid

        * (if not created).

        */

        TInt AddNewFolderL();

    private:

        /**

        * Command "Move To Folder". Launch target folder selection dialog and

        * move marked item(s).

        */

        void MoveMarkedItemsL();

        /**

        * Command "Rename". Rename current item.

        * Does nothing if no item is highlighted.

        */

        void RenameCurrentItemL();

	protected:    // implementation details.

        /**

        * Open a folder by Uid and display its contents. Expects the

        * model's db be open.

        * @param aFolder Folder to open.

        */

        void OpenFolderL( TInt aFolder );

        /**

        * Open next folder.

        * @param aForward Open next folder if ETrue, previous if EFalse.

        */

        virtual void OpenNextFolderL( TBool aForward );

	private:

        /**

        * Fill listbox with folder contents. Expects the model's db be open.

        * @param aFolder Folder to display.

        * @param aKeepState If ETrue, try to restore marks/highlight/top item

        * position.

        */

        void FillListboxL( TInt aFolder, TBool aKeepState );

        /**

        * Display confirmation dialog before deleting items. The dialog

        * displayed is context-dependent (different dialog for one/more

        * items, and for non-empty folders).

        * @param aUids List of Uids (both item & folder) about to be deleted.

        * @param aFolderUids List of folder uids about to be deleted. These

        * uids are also in aUids, and are needed only to improve performance.

        * (The non-empty folder checking, which is the only database query in

        * this method, is performed only for folders. The effect of this is

        * visible only if many items are selected.)

        * @return ETrue if delete was confirmed; EFalse if not, or in case of

        * any error (e.g. database error).

        */

        TBool ConfirmDeleteL

            ( CArrayFix<TInt>& aUids, CArrayFix<TInt>& aFolderUids );

        /**

        * After deleting items, display appropriate note about the outcome.

        * @param aUids List of Uids that were selected for deletion.

        * @param aNotDeletedUids List of Uids which are not deleted.

        */

        void DisplayResultOfDeleteL

            (

            const CArrayFix<TInt>& aUids,

            const CArrayFix<TInt>& aNotDeletedUids

            );

        /**

        * Launch target folder selection dialog and return uid of selected

        * folder (or KFavouritesNullUid if cancelled or in case of any error).

        * If no folders exist, user is prompted to create one.

        * @param aExcludeFolder Exclude this folder from selection (current

        * folder).

        * @return Uid of selected folder, or KFavouritesNullUid.

        */

        TInt SelectTargetFolderL( TInt aExcludeFolder );

        /**

        * "First pass" of moving is done; items that could be moved without

        * user intervention, has been moved. Some of them may be still there,

        * because it is unmovable (e.g. Homepage), or conflicts with a name in

        * the target folder. For the latter ones, ask for each if replace the

        * old ones, and act accordingly.

        * Display appropriate note about what happened.

        * @param aFolder The target folder.

        * @param aUids List of Uids that were selected for moving.

        * @param aUnmovableUids List of Uids which could never be moved.

        * @param aConflictingNameUids List of conflicting name Uids.

        */

        void HandleMoveResultL

            (

            TInt aFolder,

            const CArrayFix<TInt>& aUids,

            const CArrayFix<TInt>& aUnmovableUids,

            const CArrayFix<TInt>& aConflictingNameUids

            );

        /**

        * For each of the items in the list, display a rename dialog before

        * moving them into the folder.

        * @param aFolder The target folder.

        * @param aUids List of Uids that were selected for moving.

        */

        void RenameAndMoveItemsL

            ( const CArrayFix<TInt>& aUids, TInt aFolder );

    protected:    // new methods

        /**

        * Update and draw navi pane (show tabs for root, or "1/4" style text

        * for subfolders).

        * No sanity check; expects the model's table be open.

        */

        virtual void UpdateNaviPaneL();

    private:    // new methods

        /**

        * The container passes back key events to the view first, to

        * allow moving between folders. (The container does not know

        * anything about folders.)

        */

        friend class CBrowserFavouritesContainer;

	protected:

        /**

        * Handle key event (called from the container, to allow moving between

        * folders.

        * @param aKeyEvent The key event.

        * @param aType Key event type.

        * @return Response (was the key event consumed?).

        */

        virtual TKeyResponse OfferKeyEventL

            ( const TKeyEvent& aKeyEvent, TEventCode aType );

        /**

        * Reset state with deactivation event

        */

        void ResetStateInDeActivation();

        /**  

        * Needed for updating tool bar buttons when there is a up/down arrow key events received.  

        **/  

        virtual void UpdateToolbarButtonsState(); 

    private:    // from MWmlBrowserFavouritesModelObserver

        /**

        * Handle model change.

        */

        void HandleFavouritesModelChangeL();

    private:    // from MCommsModelObserver

        /**

        * Handle Comms Model change (AP update).

        */

        void HandleCommsModelChangeL();

    private:    // default item settings 

        /**

        * Set Prefered the current item 

        */

        void  SetPreferedCurrentItemL();

        /**

        * Set Prefered the current item