/*

* Copyright (c) 2005-2006 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:  

*

*/

#ifndef C_CONTENTPRIORITYMAP_H

#define C_CONTENTPRIORITYMAP_H

#include <e32base.h>

#include <e32hashtab.h>

namespace AiUtility {

/**

 *  Content priority map for UI controllers.

 *

 *  @lib aiutils.lib

 *  @since S60 3.2

 */

class CContentPriorityMap : public CBase

    {

public:

    /**

     * Creates and returns a new instance of this class.

     *

     * @post CurrentPriority(*) == KErrNotFound

     */

    IMPORT_C static CContentPriorityMap* NewL();

    virtual ~CContentPriorityMap();

    /**

     * Returns the current priority assigned to UI element.

     *

     * @param aUiElementId  textual identifier of the UI element.

     * @return Current priority set to ui element or KErrNotFound if not set.

     */

    IMPORT_C TInt CurrentPriority( const TDesC8& aUiElementId ) const;

    /**

     * Sets the current priority assigned to UI element.

     *

     * @param aUiElementId  textual identifier of the UI element.

     * @param aPriority     priority value to set.

     * @return KErrNone if priority was set succesfully, otherwise one of

     *         the system-wide error codes.

     * @post CurrentPriority(aUiElementId) == aPriority

     */

    IMPORT_C TInt SetCurrentPriority( const TDesC8& aUiElementId, TInt aPriority );

    /**

     * Clears the current priority assigned to UI element.

     *

     * @param aUiElementId  textual identifier of the UI element.

     * @post CurrentPriority(aUiElementId) == KErrNotFound

     */

    IMPORT_C void ClearPriority( const TDesC8& aUiElementId );

    /**

     * Clears all priority assignments of this map.

     */

    IMPORT_C void Reset();

    /**

     * Tests if content with given priority may override

     * current content in given ui element.

     *

     * @param aUiElementId  textual identifier of the UI element.

     * @param aNewPriority  priority of the new content.

     */

    IMPORT_C TBool OverrideContent( const TDesC8& aUiElementId, TInt aNewPriority ) const;

private:

    CContentPriorityMap();

private: // data

    RPtrHashMap<TDesC8,TInt> iPriorityMap;

    };

} // namespace AiUtility

#endif // C_CONTENTPRIORITYMAP_H