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https://github.com/rakshasa/rtorrent.git
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rakshasa
b25af84ee8
git-svn-id: svn://rakshasa.no/libtorrent/trunk/rtorrent@621 e378c898-3ddf-0310-93e7-cc216c733640
142 lines
4.3 KiB
C++
142 lines
4.3 KiB
C++
// rTorrent - BitTorrent client
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// Copyright (C) 2005-2006, Jari Sundell
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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// In addition, as a special exception, the copyright holders give
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// permission to link the code of portions of this program with the
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// OpenSSL library under certain conditions as described in each
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// individual source file, and distribute linked combinations
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// including the two.
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//
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// You must obey the GNU General Public License in all respects for
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// all of the code used other than OpenSSL. If you modify file(s)
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// with this exception, you may extend this exception to your version
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// of the file(s), but you are not obligated to do so. If you do not
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// wish to do so, delete this exception statement from your version.
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// If you delete this exception statement from all source files in the
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// program, then also delete it here.
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//
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// Contact: Jari Sundell <jaris@ifi.uio.no>
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//
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// Skomakerveien 33
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// 3185 Skoppum, NORWAY
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#ifndef RTORRENT_UTILS_LIST_FOCUS_H
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#define RTORRENT_UTILS_LIST_FOCUS_H
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#include <sigc++/signal.h>
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namespace utils {
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// Can't make this class inherit privately due to gcc PR 14258.
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template <typename Base>
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class ListFocus {
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public:
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typedef typename Base::iterator iterator;
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typedef typename Base::const_iterator const_iterator;
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typedef typename Base::reverse_iterator reverse_iterator;
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typedef typename Base::const_reverse_iterator const_reverse_iterator;
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typedef typename Base::value_type value_type;
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typedef sigc::signal0<void> Signal;
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ListFocus(Base* b = NULL) : m_base(b) { if (b) m_focus = b->end(); }
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// Convinience functions, would have added more through using, but
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// can't.
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iterator begin() { return m_base->begin(); }
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iterator end() { return m_base->end(); }
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reverse_iterator rbegin() { return m_base->rbegin(); }
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reverse_iterator rend() { return m_base->rend(); }
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// Don't do erase on this object without making sure focus is right.
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Base& base() { return *m_base; }
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iterator get_focus() { return m_focus; }
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void set_focus(iterator itr) { m_focus = itr; m_signalChanged.emit(); }
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// These are looping increment/decrements.
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iterator inc_focus();
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iterator dec_focus();
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iterator erase(iterator itr);
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void remove(const value_type& v);
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// Be careful with copying signals.
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Signal& signal_changed() { return m_signalChanged; }
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private:
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Base* m_base;
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iterator m_focus;
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Signal m_signalChanged;
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};
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template <typename Base>
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typename ListFocus<Base>::iterator
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ListFocus<Base>::inc_focus() {
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if (m_focus != end())
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++m_focus;
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else
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m_focus = begin();
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m_signalChanged.emit();
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return m_focus;
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}
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template <typename Base>
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typename ListFocus<Base>::iterator
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ListFocus<Base>::dec_focus() {
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if (m_focus != begin())
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--m_focus;
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else
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m_focus = end();
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m_signalChanged.emit();
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return m_focus;
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}
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template <typename Base>
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typename ListFocus<Base>::iterator
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ListFocus<Base>::erase(iterator itr) {
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if (itr == m_focus)
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return m_focus = m_base->erase(itr);
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else
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return m_base->erase(itr);
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m_signalChanged.emit();
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}
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template <typename Base>
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void
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ListFocus<Base>::remove(const value_type& v) {
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iterator first = begin();
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iterator last = end();
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while (first != last)
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if (*first == v)
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first = erase(first);
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else
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++first;
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}
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}
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#endif
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