src/supertux/world.cpp

   1 //  SuperTux
   2 //  Copyright (C) 2006 Matthias Braun <matze@braunis.de>
   3 //
   4 //  This program is free software: you can redistribute it and/or modify
   5 //  it under the terms of the GNU General Public License as published by
   6 //  the Free Software Foundation, either version 3 of the License, or
   7 //  (at your option) any later version.
   8 //
   9 //  This program is distributed in the hope that it will be useful,
  10 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 //  GNU General Public License for more details.
  13 //
  14 //  You should have received a copy of the GNU General Public License
  15 //  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 #include <algorithm>
  18
  19 #include "lisp/parser.hpp"
  20 #include "lisp/writer.hpp"
  21 #include "physfs/ifile_streambuf.hpp"
  22 #include "scripting/serialize.hpp"
  23 #include "scripting/squirrel_util.hpp"
  24 #include "supertux/gameconfig.hpp"
  25 #include "supertux/globals.hpp"
  26 #include "supertux/player_status.hpp"
  27 #include "supertux/screen_fade.hpp"
  28 #include "supertux/screen_manager.hpp"
  29 #include "supertux/world.hpp"
  30 #include "supertux/world_state.hpp"
  31 #include "util/file_system.hpp"
  32 #include "util/reader.hpp"
  33 #include "util/string_util.hpp"
  34 #include "worldmap/worldmap.hpp"
  35
  36 std::unique_ptr<World>
  37 World::load(const std::string& directory)
  38 {
  39   std::unique_ptr<World> world(new World);
  40
  41   world->load_(directory);
  42
  43   { // generate savegame filename
  44     std::string worlddirname = FileSystem::basename(directory);
  45     std::ostringstream stream;
  46     stream << "profile" << g_config->profile << "/" << worlddirname << ".stsg";
  47     std::string slotfile = stream.str();
  48     world->m_savegame_filename = stream.str();
  49   }
  50
  51   return std::move(world);
  52 }
  53
  54 World::World() :
  55   m_levels(),
  56   m_basedir(),
  57   m_worldmap_filename(),
  58   m_savegame_filename(),
  59   m_world_thread(),
  60   m_title(),
  61   m_description(),
  62   m_world_state(new WorldState),
  63   m_hide_from_contribs(false),
  64   m_is_levelset(true)
  65 {
  66   sq_resetobject(&m_world_thread);
  67 }
  68
  69 World::~World()
  70 {
  71   sq_release(scripting::global_vm, &m_world_thread);
  72 }
  73
  74 void
  75 World::load_(const std::string& directory)
  76 {
  77   m_basedir = directory;
  78   m_worldmap_filename = m_basedir + "/worldmap.stwm";
  79
  80   lisp::Parser parser;
  81   const lisp::Lisp* root = parser.parse(m_basedir + "/info");
  82
  83   const lisp::Lisp* info = root->get_lisp("supertux-world");
  84   if(info == NULL)
  85     info = root->get_lisp("supertux-level-subset");
  86   if(info == NULL)
  87     throw std::runtime_error("File is not a world or levelsubset file");
  88
  89   m_hide_from_contribs = false;
  90   m_is_levelset = true;
  91
  92   info->get("title", m_title);
  93   info->get("description", m_description);
  94   info->get("levelset", m_is_levelset);
  95   info->get("hide-from-contribs", m_hide_from_contribs);
  96
  97   // Level info file doesn't define any levels, so read the
  98   // directory to see what we can find
  99
 100   char** files = PHYSFS_enumerateFiles(m_basedir.c_str());
 101   if(!files)
 102   {
 103     log_warning << "Couldn't read subset dir '" << m_basedir << "'" << std::endl;
 104     return;
 105   }
 106
 107   for(const char* const* filename = files; *filename != 0; ++filename)
 108   {
 109     if(StringUtil::has_suffix(*filename, ".stl"))
 110     {
 111       m_levels.push_back(*filename);
 112     }
 113   }
 114   PHYSFS_freeList(files);
 115
 116   std::sort(m_levels.begin(), m_levels.end(), StringUtil::numeric_less);
 117 }
 118
 119 void
 120 World::run()
 121 {
 122   // create new squirrel table for persistent game state
 123   HSQUIRRELVM vm = scripting::global_vm;
 124
 125   sq_pushroottable(vm);
 126   sq_pushstring(vm, "state", -1);
 127   sq_newtable(vm);
 128   if(SQ_FAILED(sq_createslot(vm, -3)))
 129   {
 130     throw scripting::SquirrelError(vm, "Couldn't create state table");
 131   }
 132   else
 133   {
 134     sq_pop(vm, 1);
 135
 136     load_state();
 137
 138     std::string filename = m_basedir + "/world.nut";
 139     try
 140     {
 141       IFileStreambuf ins(filename);
 142       std::istream in(&ins);
 143
 144       sq_release(scripting::global_vm, &m_world_thread);
 145       m_world_thread = scripting::create_thread(scripting::global_vm);
 146       scripting::compile_and_run(scripting::object_to_vm(m_world_thread), in, filename);
 147     }
 148     catch(const std::exception& )
 149     {
 150       // fallback: try to load worldmap worldmap.stwm
 151       g_screen_manager->push_screen(std::unique_ptr<Screen>(
 152                                       new worldmap::WorldMap(m_worldmap_filename,
 153                                                              get_player_status())));
 154     }
 155   }
 156 }
 157
 158 void
 159 World::save_state()
 160 {
 161   m_world_state->save(m_savegame_filename);
 162 }
 163
 164 void
 165 World::load_state()
 166 {
 167   m_world_state->load(m_savegame_filename);
 168 }
 169
 170 std::string
 171 World::get_level_filename(unsigned int i) const
 172 {
 173   return FileSystem::join(m_basedir, m_levels[i]);
 174 }
 175
 176 int
 177 World::get_num_levels() const
 178 {
 179   return static_cast<int>(m_levels.size());
 180 }
 181
 182 int
 183 World::get_num_solved_levels() const
 184 {
 185   int num_solved_levels = 0;
 186
 187   HSQUIRRELVM vm = scripting::global_vm;
 188   int oldtop = sq_gettop(vm);
 189
 190   sq_pushroottable(vm);
 191   sq_pushstring(vm, "state", -1);
 192   if(SQ_FAILED(sq_get(vm, -2)))
 193   {
 194     log_warning << "failed to get 'state' table" << std::endl;
 195   }
 196   else
 197   {
 198     sq_pushstring(vm, "worlds", -1);
 199     if(SQ_FAILED(sq_get(vm, -2)))
 200     {
 201       log_warning << "failed to get 'state.worlds' table" << std::endl;
 202     }
 203     else
 204     {
 205       sq_pushstring(vm, m_worldmap_filename.c_str(), -1);
 206       if(SQ_FAILED(sq_get(vm, -2)))
 207       {
 208         log_warning << "failed to get state.worlds['" << m_worldmap_filename << "']" << std::endl;
 209       }
 210       else
 211       {
 212         sq_pushstring(vm, "levels", -1);
 213         if(SQ_FAILED(sq_get(vm, -2)))
 214         {
 215           log_warning << "failed to get state.worlds['" << m_worldmap_filename << "'].levels" << std::endl;
 216         }
 217         else
 218         {
 219           for(auto level : m_levels)
 220           {
 221             sq_pushstring(vm, level.c_str(), -1);
 222             if(SQ_FAILED(sq_get(vm, -2)))
 223             {
 224               log_warning << "failed to get state.worlds['" << m_worldmap_filename << "'].levels['"
 225                           << level << "']" << std::endl;
 226             }
 227             else
 228             {
 229               bool solved = scripting::read_bool(vm, "solved");
 230               if (solved)
 231               {
 232                 num_solved_levels += 1;
 233               }
 234               sq_pop(vm, 1);
 235             }
 236           }
 237         }
 238       }
 239     }
 240   }
 241
 242   sq_settop(vm, oldtop);
 243
 244   return num_solved_levels;
 245 }
 246
 247 std::string
 248 World::get_basedir() const
 249 {
 250   return m_basedir;
 251 }
 252
 253 std::string
 254 World::get_title() const
 255 {
 256   return m_title;
 257 }
 258
 259 /* EOF */