src/event_manager.h

   1 /*
   2 Minetest
   3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #pragma once
  21
  22 #include "event.h"
  23 #include <list>
  24 #include <map>
  25
  26 class EventManager: public MtEventManager
  27 {
  28         static void receiverReceive(MtEvent *e, void *data)
  29         {
  30                 MtEventReceiver *r = (MtEventReceiver*)data;
  31                 r->onEvent(e);
  32         }
  33         struct FuncSpec{
  34                 event_receive_func f;
  35                 void *d;
  36                 FuncSpec(event_receive_func f, void *d):
  37                         f(f), d(d)
  38                 {}
  39         };
  40         struct Dest{
  41                 std::list<FuncSpec> funcs;
  42         };
  43         std::map<std::string, Dest> m_dest;
  44
  45 public:
  46         ~EventManager() = default;
  47
  48         void put(MtEvent *e)
  49         {
  50                 std::map<std::string, Dest>::iterator i = m_dest.find(e->getType());
  51                 if(i != m_dest.end()){
  52                         std::list<FuncSpec> &funcs = i->second.funcs;
  53                         for (FuncSpec &func : funcs) {
  54                                 (*(func.f))(e, func.d);
  55                         }
  56                 }
  57                 delete e;
  58         }
  59         void reg(const char *type, event_receive_func f, void *data)
  60         {
  61                 std::map<std::string, Dest>::iterator i = m_dest.find(type);
  62                 if(i != m_dest.end()){
  63                         i->second.funcs.emplace_back(f, data);
  64                 } else{
  65                         std::list<FuncSpec> funcs;
  66                         Dest dest;
  67                         dest.funcs.emplace_back(f, data);
  68                         m_dest[type] = dest;
  69                 }
  70         }
  71         void dereg(const char *type, event_receive_func f, void *data)
  72         {
  73                 if(type != NULL){
  74                         std::map<std::string, Dest>::iterator i = m_dest.find(type);
  75                         if(i != m_dest.end()){
  76                                 std::list<FuncSpec> &funcs = i->second.funcs;
  77                                 std::list<FuncSpec>::iterator j = funcs.begin();
  78                                 while(j != funcs.end()){
  79                                         bool remove = (j->f == f && (!data || j->d == data));
  80                                         if(remove)
  81                                                 funcs.erase(j++);
  82                                         else
  83                                                 ++j;
  84                                 }
  85                         }
  86                 } else{
  87                         for (auto &dest : m_dest) {
  88                                 std::list<FuncSpec> &funcs = dest.second.funcs;
  89                                 std::list<FuncSpec>::iterator j = funcs.begin();
  90                                 while(j != funcs.end()){
  91                                         bool remove = (j->f == f && (!data || j->d == data));
  92                                         if(remove)
  93                                                 funcs.erase(j++);
  94                                         else
  95                                                 ++j;
  96                                 }
  97                         }
  98                 }
  99         }
 100         void reg(MtEventReceiver *r, const char *type)
 101         {
 102                 reg(type, EventManager::receiverReceive, r);
 103         }
 104         void dereg(MtEventReceiver *r, const char *type)
 105         {
 106                 dereg(type, EventManager::receiverReceive, r);
 107         }
 108 };