[857] | 1 | // Boost.Signals library
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| 2 |
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| 3 | // Copyright Douglas Gregor 2001-2004. Use, modification and
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| 4 | // distribution is subject to the Boost Software License, Version
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| 5 | // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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| 6 | // http://www.boost.org/LICENSE_1_0.txt)
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| 7 |
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| 8 | // For more information, see http://www.boost.org
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| 9 |
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| 10 | #ifndef BOOST_SIGNALS_NAMED_SLOT_MAP_HPP
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| 11 | #define BOOST_SIGNALS_NAMED_SLOT_MAP_HPP
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| 12 |
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| 13 | #include <boost/signals/detail/config.hpp>
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| 14 | #include <boost/signals/detail/signals_common.hpp>
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| 15 | #include <boost/signals/connection.hpp>
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| 16 | #include <boost/utility.hpp>
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| 17 | #include <boost/shared_ptr.hpp>
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| 18 | #include <boost/function/function2.hpp>
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| 19 | #include <boost/iterator/iterator_facade.hpp>
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| 20 | #include <map>
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| 21 | #include <memory>
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| 22 | #include <utility>
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| 23 |
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| 24 | namespace boost { namespace BOOST_SIGNALS_NAMESPACE {
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| 25 |
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| 26 | enum connect_position { at_back, at_front };
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| 27 |
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| 28 | namespace detail {
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| 29 |
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| 30 | class stored_group
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| 31 | {
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| 32 | public:
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| 33 | enum storage_kind { sk_empty, sk_front, sk_back, sk_group };
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| 34 |
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| 35 | stored_group(storage_kind kind = sk_empty) : kind(kind), group() { }
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| 36 |
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| 37 | template<typename T>
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| 38 | stored_group(const T& group) : kind(sk_group), group(new T(group)) { }
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| 39 |
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| 40 | bool is_front() const { return kind == sk_front; }
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| 41 | bool is_back() const { return kind == sk_back; }
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| 42 | bool empty() const { return kind == sk_empty; }
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| 43 |
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| 44 | void* get() const { return group.get(); }
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| 45 |
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| 46 | private:
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| 47 | storage_kind kind;
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| 48 | shared_ptr<void> group;
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| 49 | };
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| 50 |
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| 51 | typedef function2<bool, stored_group, stored_group> compare_type;
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| 52 |
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| 53 | // This function object bridges from a pair of any objects that hold
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| 54 | // values of type Key to the underlying function object that compares
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| 55 | // values of type Key.
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| 56 | template<typename Compare, typename Key>
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| 57 | class group_bridge_compare {
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| 58 | public:
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| 59 | typedef bool result_type;
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| 60 | typedef const stored_group& first_argument_type;
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| 61 | typedef const stored_group& second_argument_type;
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| 62 |
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| 63 | group_bridge_compare(const Compare& c) : comp(c) {}
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| 64 |
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| 65 | bool operator()(const stored_group& k1, const stored_group& k2) const
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| 66 | {
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| 67 | if (k1.is_front()) return !k2.is_front();
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| 68 | if (k1.is_back()) return false;
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| 69 | if (k2.is_front()) return false;
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| 70 | if (k2.is_back()) return true;
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| 71 |
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| 72 | // Neither is empty, so compare their values to order them
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| 73 | return comp(*static_cast<Key*>(k1.get()), *static_cast<Key*>(k2.get()));
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| 74 | }
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| 75 |
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| 76 | private:
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| 77 | Compare comp;
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| 78 | };
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| 79 |
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| 80 | class BOOST_SIGNALS_DECL named_slot_map_iterator :
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| 81 | public iterator_facade<named_slot_map_iterator,
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| 82 | connection_slot_pair,
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| 83 | forward_traversal_tag>
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| 84 | {
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| 85 | typedef std::list<connection_slot_pair> group_list;
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| 86 | typedef group_list::iterator slot_pair_iterator;
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| 87 | typedef std::map<stored_group, group_list, compare_type> slot_container_type;
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| 88 | typedef slot_container_type::iterator group_iterator;
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| 89 | typedef slot_container_type::const_iterator const_group_iterator;
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| 90 |
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| 91 | typedef iterator_facade<named_slot_map_iterator,
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| 92 | connection_slot_pair,
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| 93 | forward_traversal_tag> inherited;
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| 94 | public:
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| 95 | named_slot_map_iterator();
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| 96 | named_slot_map_iterator(const named_slot_map_iterator&);
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| 97 | named_slot_map_iterator& operator=(const named_slot_map_iterator&);
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| 98 |
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| 99 | connection_slot_pair& dereference() const;
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| 100 | void increment();
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| 101 | bool equal(const named_slot_map_iterator& other) const;
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| 102 |
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| 103 | #if BOOST_WORKAROUND(_MSC_VER, <= 1400)
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| 104 | void decrement();
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| 105 | void advance(difference_type);
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| 106 | #endif
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| 107 |
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| 108 | private:
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| 109 | named_slot_map_iterator(group_iterator group, group_iterator last) :
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| 110 | group(group), last_group(last), slot_assigned(false)
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| 111 | { init_next_group(); }
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| 112 | named_slot_map_iterator(group_iterator group, group_iterator last,
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| 113 | slot_pair_iterator slot) :
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| 114 | group(group), last_group(last), slot_(slot), slot_assigned(true)
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| 115 | { }
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| 116 |
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| 117 | void init_next_group()
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| 118 | {
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| 119 | while (group != last_group && group->second.empty()) ++group;
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| 120 | if (group != last_group) {
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| 121 | slot_ = group->second.begin();
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| 122 | slot_assigned = true;
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| 123 | }
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| 124 | }
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| 125 |
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| 126 | group_iterator group;
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| 127 | group_iterator last_group;
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| 128 | slot_pair_iterator slot_;
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| 129 | bool slot_assigned;
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| 130 |
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| 131 | friend class named_slot_map;
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| 132 | };
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| 133 |
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| 134 | class BOOST_SIGNALS_DECL named_slot_map
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| 135 | {
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| 136 | public:
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| 137 | typedef named_slot_map_iterator iterator;
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| 138 |
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| 139 | named_slot_map(const compare_type& compare);
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| 140 |
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| 141 | void clear();
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| 142 | iterator begin();
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| 143 | iterator end();
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| 144 | iterator insert(const stored_group& name, const connection& con,
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| 145 | const any& slot, connect_position at);
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| 146 | void disconnect(const stored_group& name);
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| 147 | void erase(iterator pos);
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| 148 | void remove_disconnected_slots();
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| 149 |
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| 150 | private:
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| 151 | typedef std::list<connection_slot_pair> group_list;
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| 152 | typedef std::map<stored_group, group_list, compare_type> slot_container_type;
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| 153 | typedef slot_container_type::iterator group_iterator;
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| 154 | typedef slot_container_type::const_iterator const_group_iterator;
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| 155 |
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| 156 | bool empty(const_group_iterator group) const
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| 157 | {
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| 158 | return (group->second.empty() && group != groups.begin() && group != back);
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| 159 | }
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| 160 | slot_container_type groups;
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| 161 | group_iterator back;
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| 162 | };
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| 163 |
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| 164 | } } }
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| 165 |
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| 166 | #endif // BOOST_SIGNALS_NAMED_SLOT_MAP_HPP
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