/*

* Copyright (c) 2002-2007 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:  Composite contact view.

*

*/

#ifndef CVPBKCOMPOSITECONTACTVIEW_H

#define CVPBKCOMPOSITECONTACTVIEW_H

// INCLUDE FILES

#include <e32base.h>

#include <MVPbkContactViewBase.h>

#include <MVPbkContactViewObserver.h>

#include <MVPbkContactViewFiltering.h>

#include <MVPbkContactViewBaseChildAccessExtension.h>

#include <VPbkContactView.hrh>

#include <CVPbkAsyncOperation.h>

#include "CVPbkEventArrayItem.h"

// FORWARD DECLARATIONS

class MVPbkContactViewSortPolicy;

class CVPbkEventArrayItem;

class MVPbkCompositeContactViewPolicy;

/**

 * Virtual Phonebook abstract composite contact view.

 * Composite contact views can be used to compose a view from

 * multiple sub views.

 */

NONSHARABLE_CLASS(CVPbkCompositeContactView) : 

        public CBase,

        public MVPbkContactViewBase,

        public MVPbkContactViewObserver,

        protected MVPbkContactViewFiltering,

        public MVPbkContactViewBaseChildAccessExtension

	{

    public: // Constructors and destructor

        /**

         * Destructor.

         */

        ~CVPbkCompositeContactView();

    public: // Interface

        /**

         * Adds subview to this composite view. Ownership is transferred

         * if leave does not occur.

         * NOTE: This composite view must already be an observer of aSubView

         *       when calling this function.

         *

         * @param aSubView Subview to add to this composite view.

         * @param aViewId ViewId of added subview

         */

        void AddSubViewL(

                MVPbkContactViewBase* aSubView, TInt  aViewId = KVPbkDefaultViewId);

        /**

         * ActualContactCountL returns the number of contact's in subviews.

         * It might be that all subview events haven't

         * arrived yet to this composite so ActualContactCountL is not always

         * same as CompositeContactCountL

         *

         * @return the contact count calculated from subviews.

         */

        TInt ActualContactCountL() const;

        /**

         * @return The number of contacts in iContactMapping

         */

        inline TInt CompositeContactCountL() const;

        /**

         * If the parent of this view is also a composite view

         * it calls this to configure this view as an internal view

         * that has no external observers.

         */

        void ApplyInternalCompositePolicyL();

        void SetViewId(TInt aViewId);

    private: // Abstract interface for composite implementations

        /**

         * Builds view mapping.

         */

        virtual void DoBuildContactMappingL() = 0;

        /**

         * Handles contact addition to the view.

         *

         * @param aSubViewIndex     Sub view index.

         * @param aIndex            Index of the contact in the sub view.

         * @return  Composite contact view index of the added contact.

         */

        virtual TInt DoHandleContactAdditionL(

                TInt aSubViewIndex,

                TInt aIndex ) = 0;

    public: // From MVPbkContactViewBase

        TVPbkContactViewType Type() const;

        void ChangeSortOrderL(

                const MVPbkFieldTypeList& aSortOrder );

        const MVPbkFieldTypeList& SortOrder() const;

        void RefreshL();

        TInt ContactCountL() const;

        const MVPbkViewContact& ContactAtL(

                TInt aIndex ) const;

        MVPbkContactLink* CreateLinkLC(

                TInt aIndex ) const;

        TInt IndexOfLinkL(

                const MVPbkContactLink& aContactLink ) const;

        void AddObserverL(

                MVPbkContactViewObserver& aObserver );

        void RemoveObserver(

                MVPbkContactViewObserver& aObserver );

        TBool MatchContactStore(

                const TDesC& aContactStoreUri ) const;

        TBool MatchContactStoreDomain(

                const TDesC& aContactStoreDomain ) const;

        MVPbkContactBookmark* CreateBookmarkLC(

                TInt aIndex ) const;

        TInt IndexOfBookmarkL(

                const MVPbkContactBookmark& aContactBookmark ) const;

        MVPbkContactViewFiltering* ViewFiltering();

        TAny* ContactViewBaseExtension(TUid aExtensionUid); 

    private: // From MVPbkContactViewObserver

        void ContactViewReady(

                MVPbkContactViewBase& aView );

        void ContactViewUnavailable(

                MVPbkContactViewBase& aView );

        void ContactAddedToView(

                MVPbkContactViewBase& aView,

                TInt aIndex,

                const MVPbkContactLink& aContactLink );

        void ContactRemovedFromView(

                MVPbkContactViewBase& aView,

                TInt aIndex,

                const MVPbkContactLink& aContactLink );

        void ContactViewError(

                MVPbkContactViewBase& aView,

                TInt aError,

                TBool aErrorNotified);

    private: // From MVPbkContactViewFiltering

        /// Composite implementations must implement this

        virtual MVPbkContactViewBase* CreateFilteredViewLC(

            MVPbkContactViewObserver& aObserver,

            const MDesCArray& aFindWords,

            const MVPbkContactBookmarkCollection* aAlwaysIncludedContacts ) = 0;

        void UpdateFilterL( 

            const MDesCArray& aFindWords,

            const MVPbkContactBookmarkCollection* aAlwaysIncludedContacts );

    private: // From MVPbkContactViewBaseChildAccessExtension

        TInt ChildViewCount() const;

        MVPbkContactViewBase& ChildViewAt(TInt aIndex);

        MVPbkContactViewBase* GetChildViewById(TInt aId);

        TInt GetViewId();

    protected: // Types

        class CSubViewData;

        /**

         * Contact mapping structure. Mapping supports 128 subviews

         * and over 8 million contacts per sub view.

         */

        struct TContactMapping

            {

            /// Own: View index

            TInt iViewIndex: 8;

            /// Own: Contact index

            TInt iContactIndex: 24;

            };                          

    protected: // Implementation

        CVPbkCompositeContactView();

        void BaseConstructL(

                const MVPbkFieldTypeList& aSortOrder );

        static TBool CompareMappings(

                const TContactMapping& aLhs,

                const TContactMapping& aRhs );

        TBool IsCompositeReady() const;

        /// Returns the composite's view policy.

        MVPbkCompositeContactViewPolicy& CompositePolicy() const;

    private: // Implementation

        TInt FindSubViewIndex(MVPbkContactViewBase& aView) const;

        TBool AllSubViewsKnown() const;

        TBool AnySubViewReady() const;

        void ResetContactMapping();

        void RemoveContactMappingsFromView(MVPbkContactViewBase& aView);

        void HandleContactViewReadyL( MVPbkContactViewBase& aView );

        void HandleContactViewUnavailableL( MVPbkContactViewBase& aView );

        TInt HandleContactRemoval(

                MVPbkContactViewBase& aView,

                TInt aIndex );

        TInt HandleContactAddition(

                MVPbkContactViewBase& aView,

                TInt aIndex );

        void DoAddObserverL(MVPbkContactViewObserver& aObserver);

        void AddObserverError(

                MVPbkContactViewObserver& aObserver,

                TInt aError );

        void SendViewReadyEvent();

        void SendViewUnavailableEvent();

        void SendViewErrorEvent( TInt aError, TBool aErrorNotified );

        void UpdateSortOrderL();

    protected: // Data

        /// Own: Array of subviews

        RPointerArray<CSubViewData> iSubViews;

        /// Own: Array of contact mappings

        RArray<TContactMapping> iContactMapping;

    private: // Data

        /// Ref: Async operation

        VPbkEngUtils::CVPbkAsyncOperation iAsyncOperation;

        /// Own: Sort order

        MVPbkFieldTypeList* iSortOrder;

        /// Own: Array of observers

        RPointerArray<MVPbkContactViewObserver> iObservers;

        /// Own: A policy for composite's internal functionality

        MVPbkCompositeContactViewPolicy* iCompositePolicy;

        /// Current view identifier

        TInt iViewId;

    };

inline TInt CVPbkCompositeContactView::CompositeContactCountL() const

    {

    return iContactMapping.Count();

    }

/**

 * Class to hold subview data.

 */

NONSHARABLE_CLASS( CVPbkCompositeContactView::CSubViewData ):

        public CBase

    {

    public: // Types

        /**

         * View state enumeration.

         */

        enum TViewState

            {

            ENotKnown,

            EUnavailable,

            EReady

            };

    public: // Constructors and destructor

        /**

         * Constructor.

         *

         * @param aState    View state.

         */

        CSubViewData(TViewState aState) : iState( aState ) {}

        /**

         * Destructor.

         */

        ~CSubViewData();

    public: // Data

        /// Ref: Contact view

        MVPbkContactViewBase* iView;

        /// Own: View state

        TViewState iState;

        /// Ref: Cursor pointer, used when merging

        const MVPbkViewContact* iContactCursor;

        /// Own: Cursor

        TInt iCursor;

        /// view identifier of iView member variable

        TInt  iViewId;

    };

/**

 * Internal interface for different behavior of exterior and interior

 * composite views.

 */ 

NONSHARABLE_CLASS(MVPbkCompositeContactViewPolicy)

    {

    public: 

        /**

         * Destructor

         */

        virtual ~MVPbkCompositeContactViewPolicy() {}

        /**

         * Handles contact added & removed events.

         */

        virtual void HandleViewEventsL( 

            CVPbkEventArrayItem::TViewEventType aEvent,

            MVPbkContactViewBase& aSubview,

            TInt aIndex, const 

            MVPbkContactLink& aContactLink ) = 0;

        /** 

         * Reset policy if it has cached data.

         */

        virtual void Reset() = 0;

        /**

         * Returns the contact count in composite or 0 if

         * composite is not up to date with leaf views.

         * @param aCompositeCount The count according to composite view.

         * @return aCompositeCount or 0.

         */

        virtual TInt ContactCountL() const = 0;

        /**

         * Returns ETrue if this is an internal composite policy

         * @return ETrue if this is an internal composite policy

         */ 

        virtual TBool InternalPolicy() const = 0;

    };

/**

 * An implementation for exterior composite view

 */

NONSHARABLE_CLASS(CVPbkExternalCompositeViewPolicy) :

        public CBase,

        public MVPbkCompositeContactViewPolicy

    {

    public: // Construction and destruction

        static CVPbkExternalCompositeViewPolicy* NewL(

                CVPbkCompositeContactView& aCompositeView,

                RPointerArray<MVPbkContactViewObserver>& aObservers );

        ~CVPbkExternalCompositeViewPolicy();

    private: // From MVPbkCompositeContactViewPolicy

        void HandleViewEventsL( 

            CVPbkEventArrayItem::TViewEventType aEvent,

            MVPbkContactViewBase& aSubview,

            TInt aIndex, const 

            MVPbkContactLink& aContactLink );

        void Reset();

        TInt ContactCountL() const;

        TBool InternalPolicy() const;

    private: // Implementation

        CVPbkExternalCompositeViewPolicy(

            CVPbkCompositeContactView& aCompositeView,

            RPointerArray<MVPbkContactViewObserver>& aObservers );

    private: // Data

        /// Ref: The parent of this policy

        CVPbkCompositeContactView& iCompositeView;

        /// Ref: Array of observers

        RPointerArray<MVPbkContactViewObserver>& iObservers;

        /// Own: Event array for 'Contact added or removed' events

        RPointerArray<CVPbkEventArrayItem> iEventArray;

    };

/**

 * An implementation for interior composite view

 */

NONSHARABLE_CLASS(CVPbkInternalCompositeViewPolicy) :

        public CBase,

        public MVPbkCompositeContactViewPolicy

    {

    public: // Construction and destruction

        static CVPbkInternalCompositeViewPolicy* NewL(

                CVPbkCompositeContactView& aCompositeView,

                RPointerArray<MVPbkContactViewObserver>& aObservers );

    private: // From MVPbkCompositeContactViewPolicy

        void HandleViewEventsL( 

            CVPbkEventArrayItem::TViewEventType aEvent,

            MVPbkContactViewBase& aSubview,

            TInt aIndex, const 

            MVPbkContactLink& aContactLink );

        void Reset();

        TInt ContactCountL() const;

        TBool InternalPolicy() const;

    private: // Implementation

        CVPbkInternalCompositeViewPolicy(

            CVPbkCompositeContactView& aCompositeView,

            RPointerArray<MVPbkContactViewObserver>& aObservers );

    private: // Data

        /// Ref: The parent of this policy

        CVPbkCompositeContactView& iCompositeView;

        /// Ref: Array of observers

        RPointerArray<MVPbkContactViewObserver>& iObservers;

    };

#endif // CVPBKCOMPOSITECONTACTVIEW_H

// End of File