var_list.hpp

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/*****************************************************************************
 * var_list.hpp
 *****************************************************************************
 * Copyright (C) 2003 the VideoLAN team
 * $Id: 49d70e636a44482febc95c069472eb8160c757b6 $
 *
 * Authors: Cyril Deguet     <asmax@via.ecp.fr>
 *          Olivier Teulière <ipkiss@via.ecp.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#ifndef VAR_LIST_HPP
#define VAR_LIST_HPP

#include <list>

#include "variable.hpp"
#include "observer.hpp"
#include "ustring.hpp"
#include "var_percent.hpp"


/// List variable
class VarList: public Variable, public Subject<VarList>
{
public:
    VarList( intf_thread_t *pIntf );
    virtual ~VarList();

    /// Get the variable type
    virtual const string &getType() const { return m_type; }

    /// Add a pointer on a string in the list
    virtual void add( const UStringPtr &rcString );

    /// Remove the selected elements from the list
    virtual void delSelected();

    /// Remove all the elements from the list
    virtual void clear();

    /// Get the number of items in the list
    int size() const { return m_list.size(); }

    /// Type of an element in the list
    struct Elem_t
    {
        UStringPtr m_cString;
        bool m_selected;
        bool m_playing;

        Elem_t( const UStringPtr &rcString,
                bool selected = false, bool playing = false )
              : m_cString( rcString ),
                m_selected( selected ), m_playing( playing ) { }
    };

    /// Iterators
    typedef list<Elem_t>::iterator Iterator;
    typedef list<Elem_t>::const_iterator ConstIterator;

    /// Beginning of the list
    Iterator begin() { return m_list.begin(); }
    ConstIterator begin() const { return m_list.begin(); }

    /// End of the list
    Iterator end() { return m_list.end(); }
    ConstIterator end() const { return m_list.end(); }

    /// Return an iterator on the n'th element of the list
    Iterator operator[]( int n );
    ConstIterator operator[]( int n ) const;

    /// Execute the action associated to this item
    virtual void action( Elem_t *pItem ) { }

    /// Get a reference on the position variable
    VarPercent &getPositionVar() const
        { return *((VarPercent*)m_cPosition.get()); }

    /// Get a counted pointer on the position variable
    const VariablePtr &getPositionVarPtr() const { return m_cPosition; }

protected:
    /// List of elements
    list<Elem_t> m_list;

private:
    /// Variable type
    static const string m_type;
    /// Position variable
    VariablePtr m_cPosition;
};


#endif