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Diffstat (limited to 'src/map_settings_manager.cpp')
| -rw-r--r-- | src/map_settings_manager.cpp | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/src/map_settings_manager.cpp b/src/map_settings_manager.cpp new file mode 100644 index 000000000..53d17125c --- /dev/null +++ b/src/map_settings_manager.cpp @@ -0,0 +1,194 @@ +/* +Minetest +Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net> + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along +with this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "debug.h" +#include "filesys.h" +#include "log.h" +#include "mapgen.h" +#include "settings.h" + +#include "map_settings_manager.h" + +MapSettingsManager::MapSettingsManager( + Settings *user_settings, const std::string &map_meta_path) +{ + m_map_meta_path = map_meta_path; + m_user_settings = user_settings; + m_map_settings = new Settings; + mapgen_params = NULL; + + assert(m_user_settings != NULL); +} + + +MapSettingsManager::~MapSettingsManager() +{ + delete m_map_settings; + delete mapgen_params; +} + + +bool MapSettingsManager::getMapSetting( + const std::string &name, std::string *value_out) +{ + if (m_map_settings->getNoEx(name, *value_out)) + return true; + + // Compatibility kludge + if (m_user_settings == g_settings && name == "seed") + return m_user_settings->getNoEx("fixed_map_seed", *value_out); + + return m_user_settings->getNoEx(name, *value_out); +} + + +bool MapSettingsManager::getMapSettingNoiseParams( + const std::string &name, NoiseParams *value_out) +{ + return m_map_settings->getNoiseParams(name, *value_out) || + m_user_settings->getNoiseParams(name, *value_out); +} + + +bool MapSettingsManager::setMapSetting( + const std::string &name, const std::string &value, bool override_meta) +{ + if (mapgen_params) + return false; + + if (override_meta) + m_map_settings->set(name, value); + else + m_map_settings->setDefault(name, value); + + return true; +} + + +bool MapSettingsManager::setMapSettingNoiseParams( + const std::string &name, const NoiseParams *value, bool override_meta) +{ + if (mapgen_params) + return false; + + m_map_settings->setNoiseParams(name, *value, !override_meta); + return true; +} + + +bool MapSettingsManager::loadMapMeta() +{ + std::ifstream is(m_map_meta_path.c_str(), std::ios_base::binary); + + if (!is.good()) { + errorstream << "loadMapMeta: could not open " + << m_map_meta_path << std::endl; + return false; + } + + if (!m_map_settings->parseConfigLines(is, "[end_of_params]")) { + errorstream << "loadMapMeta: [end_of_params] not found!" << std::endl; + return false; + } + + return true; +} + + +bool MapSettingsManager::saveMapMeta() +{ + // If mapgen params haven't been created yet; abort + if (!mapgen_params) + return false; + + if (!fs::CreateAllDirs(fs::RemoveLastPathComponent(m_map_meta_path))) { + errorstream << "saveMapMeta: could not create dirs to " + << m_map_meta_path; + return false; + } + + std::ostringstream oss(std::ios_base::binary); + Settings conf; + + mapgen_params->MapgenParams::writeParams(&conf); + mapgen_params->writeParams(&conf); + conf.writeLines(oss); + + // NOTE: If there are ever types of map settings other than + // those relating to map generation, save them here + + oss << "[end_of_params]\n"; + + if (!fs::safeWriteToFile(m_map_meta_path, oss.str())) { + errorstream << "saveMapMeta: could not write " + << m_map_meta_path << std::endl; + return false; + } + + return true; +} + + +MapgenParams *MapSettingsManager::makeMapgenParams() +{ + if (mapgen_params) + return mapgen_params; + + assert(m_user_settings != NULL); + assert(m_map_settings != NULL); + + // At this point, we have (in order of precedence): + // 1). m_mapgen_settings->m_settings containing map_meta.txt settings or + // explicit overrides from scripts + // 2). m_mapgen_settings->m_defaults containing script-set mgparams without + // overrides + // 3). g_settings->m_settings containing all user-specified config file + // settings + // 4). g_settings->m_defaults containing any low-priority settings from + // scripts, e.g. mods using Lua as an enhanced config file) + + // Now, get the mapgen type so we can create the appropriate MapgenParams + std::string mg_name; + MapgenType mgtype = getMapSetting("mg_name", &mg_name) ? + Mapgen::getMapgenType(mg_name) : MAPGEN_DEFAULT; + if (mgtype == MAPGEN_INVALID) { + errorstream << "EmergeManager: mapgen '" << mg_name << + "' not valid; falling back to " << + Mapgen::getMapgenName(MAPGEN_DEFAULT) << std::endl; + mgtype = MAPGEN_DEFAULT; + } + + // Create our MapgenParams + MapgenParams *params = Mapgen::createMapgenParams(mgtype); + if (params == NULL) + return NULL; + + params->mgtype = mgtype; + + // Load the rest of the mapgen params from our active settings + params->MapgenParams::readParams(m_user_settings); + params->MapgenParams::readParams(m_map_settings); + params->readParams(m_user_settings); + params->readParams(m_map_settings); + + // Hold onto our params + mapgen_params = params; + + return params; +} |