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/***************************************************************************
* Copyright (C) 2008-2012 by Andrzej Rybczak *
* electricityispower@gmail.com *
* *
* 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 St, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef _PROXY_SONG_LIST
#define _PROXY_SONG_LIST
#include "menu.h"
#include "song.h"
class ProxySongList
{
struct Interface
{
virtual ~Interface() { }
virtual bool empty() = 0;
virtual size_t size() = 0;
virtual size_t choice() = 0;
virtual void highlight(size_t pos) = 0;
virtual bool isSelected(size_t pos) = 0;
virtual void setSelected(size_t pos, bool selected) = 0;
virtual MPD::Song *getSong(size_t pos) = 0;
virtual MPD::Song *currentSong() = 0;
};
template <typename T, typename F> struct Impl : Interface
{
typedef typename NC::Menu<T> Menu;
Impl(Menu &menu, F f) : m_menu(menu), m_song_getter(f) { }
virtual ~Impl() { }
virtual bool empty() { return m_menu.Empty(); }
virtual size_t size() { return m_menu.Size(); }
virtual size_t choice() { return m_menu.Choice(); }
virtual void highlight(size_t pos) { m_menu.Highlight(pos); }
virtual bool isSelected(size_t pos) {
return m_menu[pos].isSelected();
}
virtual void setSelected(size_t pos, bool selected) {
m_menu[pos].setSelected(selected);
}
virtual MPD::Song *getSong(size_t pos) {
return m_song_getter(m_menu[pos]);
}
virtual MPD::Song *currentSong() {
if (!m_menu.Empty())
return getSong(m_menu.Choice());
else
return 0;
}
private:
Menu &m_menu;
F m_song_getter;
};
std::shared_ptr<Interface> m_impl;
public:
template <typename T, typename F>
ProxySongList(typename NC::Menu<T> &menu, F f) : m_impl(new Impl<T, F>(menu, f)) { }
bool empty() { return m_impl->empty(); }
size_t size() { return m_impl->size(); }
size_t choice() { return m_impl->choice(); }
void highlight(size_t pos) { m_impl->highlight(pos); }
bool isSelected(size_t pos) { return m_impl->isSelected(pos); }
void setSelected(size_t pos, bool selected) { m_impl->setSelected(pos, selected); }
MPD::Song *getSong(size_t pos) { return m_impl->getSong(pos); }
MPD::Song *currentSong() { return m_impl->currentSong(); }
};
template <typename T, typename F>
std::shared_ptr<ProxySongList> mkProxySongList(typename NC::Menu<T> &menu, F f)
{
return std::make_shared<ProxySongList>(ProxySongList(menu, f));
}
inline std::shared_ptr<ProxySongList> nullProxySongList()
{
return std::shared_ptr<ProxySongList>();
}
#endif
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