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// Boost.Signals library
// Copyright Douglas Gregor 2001-2004. Use, modification and
// distribution is subject to the Boost Software License, Version
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// For more information, see http://www.boost.org
#ifndef BOOST_SIGNALS_NAMED_SLOT_MAP_HPP
#define BOOST_SIGNALS_NAMED_SLOT_MAP_HPP
#include <boost/signals/detail/config.hpp>
#include <boost/signals/detail/signals_common.hpp>
#include <boost/signals/connection.hpp>
#include <boost/utility.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/function/function2.hpp>
#include <boost/iterator/iterator_facade.hpp>
#include <map>
#include <memory>
#include <utility>
namespace boost { namespace BOOST_SIGNALS_NAMESPACE {
enum connect_position { at_back, at_front };
namespace detail {
class stored_group
{
public:
enum storage_kind { sk_empty, sk_front, sk_back, sk_group };
stored_group(storage_kind p_kind = sk_empty) : kind(p_kind), group() { }
template<typename T>
stored_group(const T& p_group) : kind(sk_group), group(new T(p_group)) { }
bool is_front() const { return kind == sk_front; }
bool is_back() const { return kind == sk_back; }
bool empty() const { return kind == sk_empty; }
void* get() const { return group.get(); }
private:
storage_kind kind;
shared_ptr<void> group;
};
typedef function2<bool, stored_group, stored_group> compare_type;
// This function object bridges from a pair of any objects that hold
// values of type Key to the underlying function object that compares
// values of type Key.
template<typename Compare, typename Key>
class group_bridge_compare {
public:
typedef bool result_type;
typedef const stored_group& first_argument_type;
typedef const stored_group& second_argument_type;
group_bridge_compare(const Compare& c) : comp(c)
{ }
bool operator()(const stored_group& k1, const stored_group& k2) const
{
if (k1.is_front()) return !k2.is_front();
if (k1.is_back()) return false;
if (k2.is_front()) return false;
if (k2.is_back()) return true;
// Neither is empty, so compare their values to order them
return comp(*static_cast<Key*>(k1.get()), *static_cast<Key*>(k2.get()));
}
private:
Compare comp;
};
class BOOST_SIGNALS_DECL named_slot_map_iterator :
public iterator_facade<named_slot_map_iterator,
connection_slot_pair,
forward_traversal_tag>
{
typedef std::list<connection_slot_pair> group_list;
typedef group_list::iterator slot_pair_iterator;
typedef std::map<stored_group, group_list, compare_type> slot_container_type;
typedef slot_container_type::iterator group_iterator;
typedef slot_container_type::const_iterator const_group_iterator;
typedef iterator_facade<named_slot_map_iterator,
connection_slot_pair,
forward_traversal_tag> inherited;
public:
named_slot_map_iterator() : slot_assigned(false)
{ }
named_slot_map_iterator(const named_slot_map_iterator& other)
: group(other.group), last_group(other.last_group),
slot_assigned(other.slot_assigned)
{
if (slot_assigned) slot_ = other.slot_;
}
named_slot_map_iterator& operator=(const named_slot_map_iterator& other)
{
slot_assigned = other.slot_assigned;
group = other.group;
last_group = other.last_group;
if (slot_assigned) slot_ = other.slot_;
return *this;
}
connection_slot_pair& dereference() const
{
return *slot_;
}
void increment()
{
++slot_;
if (slot_ == group->second.end()) {
++group;
init_next_group();
}
}
bool equal(const named_slot_map_iterator& other) const {
return (group == other.group
&& (group == last_group
|| slot_ == other.slot_));
}
#if BOOST_WORKAROUND(_MSC_VER, <= 1700)
void decrement();
void advance(difference_type);
#endif
private:
named_slot_map_iterator(group_iterator giter, group_iterator last) :
group(giter), last_group(last), slot_assigned(false)
{ init_next_group(); }
named_slot_map_iterator(group_iterator giter, group_iterator last,
slot_pair_iterator slot) :
group(giter), last_group(last), slot_(slot), slot_assigned(true)
{ }
void init_next_group()
{
while (group != last_group && group->second.empty()) ++group;
if (group != last_group) {
slot_ = group->second.begin();
slot_assigned = true;
}
}
group_iterator group;
group_iterator last_group;
slot_pair_iterator slot_;
bool slot_assigned;
friend class named_slot_map;
};
class BOOST_SIGNALS_DECL named_slot_map
{
public:
typedef named_slot_map_iterator iterator;
named_slot_map(const compare_type& compare);
void clear();
iterator begin();
iterator end();
iterator insert(const stored_group& name, const connection& con,
const any& slot, connect_position at);
void disconnect(const stored_group& name);
void erase(iterator pos);
void remove_disconnected_slots();
private:
typedef std::list<connection_slot_pair> group_list;
typedef std::map<stored_group, group_list, compare_type> slot_container_type;
typedef slot_container_type::iterator group_iterator;
typedef slot_container_type::const_iterator const_group_iterator;
bool empty(const_group_iterator group) const
{
return (group->second.empty() && group != groups.begin() && group != back);
}
slot_container_type groups;
group_iterator back;
};
} } }
#endif // BOOST_SIGNALS_NAMED_SLOT_MAP_HPP
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Swift