text: /*****************************************************************************************
   *                                                                                       *
   * OpenSpace                                                                             *
   *                                                                                       *
   * Copyright (c) 2014-2019                                                               *
   *                                                                                       *
   * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
   * software and associated documentation files (the "Software"), to deal in the Software *
   * without restriction, including without limitation the rights to use, copy, modify,    *
   * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to    *
   * permit persons to whom the Software is furnished to do so, subject to the following   *
   * conditions:                                                                           *
   *                                                                                       *
   * The above copyright notice and this permission notice shall be included in all copies *
   * or substantial portions of the Software.                                              *
   *                                                                                       *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,   *
   * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A         *
   * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT    *
   * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF  *
   * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE  *
   * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                                         *
   ****************************************************************************************/
  
  #include <openspace/properties/scalar/boolproperty.h>
  
  #include <ghoul/lua/ghoul_lua.h>
  
  #include <limits>
  #include <sstream>
  
  namespace {
  
  bool fromLuaConversion(lua_State* state, bool& success) {
      success = (lua_isboolean(state, -1) == 1);
      if (success) {
          return lua_toboolean(state, -1) == 1;
      }
      else {
          return false;
      }
  }
  
  bool toLuaConversion(lua_State* state, bool value) {
      lua_pushboolean(state, value);
      return true;
  }
  
  bool fromStringConversion(const std::string& val, bool& success) {
      std::stringstream s(val);
      bool v;
      s >> v;
      success = !s.fail();
      if (success) {
          return v;
      }
      else {
          throw ghoul::RuntimeError("Conversion error for string: " + val);
      }
  }
  
  bool toStringConversion(std::string& outValue, bool inValue) {
      outValue = inValue ? "true" : "false";
      return true;
  }
  
  } // namespace
  
  namespace openspace::properties {
  
  REGISTER_TEMPLATEPROPERTY_SOURCE(
      BoolProperty,
      bool,
      false,
      fromLuaConversion,
      toLuaConversion,
      fromStringConversion,
      toStringConversion,
      LUA_TBOOLEAN
  )
  
  } // namespace openspace::properties
  