src/luaapi/loader.h

   1 /*
   2   Copyright (c) 2006 Paolo Capriotti <p.capriotti@sns.it>
   3             (c) 2006 Maurizio Monge <maurizio.monge@kdemail.net>
   4
   5   This program is free software; you can redistribute it and/or modify
   6   it under the terms of the GNU General Public License as published by
   7   the Free Software Foundation; either version 2 of the License, or
   8   (at your option) any later version.
   9 */
  10
  11 #ifndef LUAAPI__LOADER_H
  12 #define LUAAPI__LOADER_H
  13
  14 #include <map>
  15 #include <vector>
  16 #include <boost/variant.hpp>
  17 #include <QDir>
  18 #include <QImage>
  19 #include "loader/image.h"
  20 #include "option.h"
  21
  22 class lua_State;
  23 class luaL_Reg;
  24
  25 namespace Loader {
  26   class Context;
  27 }
  28
  29 namespace LuaApi {
  30
  31 class RectLess {
  32 public:
  33   bool operator()(const QRect& a, const QRect& b) {
  34     return a.x() != b.x() ? a.x() < b.x() :
  35            a.y() != b.y() ? a.y() < b.y() :
  36            a.width() != b.width() ? a.width() < b.width() :
  37            a.height() < b.height();
  38   }
  39 };
  40
  41 typedef std::map<QRect, QImage, RectLess> ImageMap;
  42 typedef boost::variant<QImage, ImageMap> ImageOrMap;
  43
  44 class Loader {
  45   bool m_error;
  46   QString m_error_string;
  47
  48   lua_State* m_state;
  49   QDir m_curr_dir;
  50
  51   static const luaL_Reg lualibs[];
  52
  53   template<typename T> struct create_value_data;
  54   template<typename T> static void retrieve(create_value_data<T>*, lua_State *l, int pos);
  55   template<typename T> static int create_value_func(lua_State *l);
  56
  57   static int import_func(lua_State *l);
  58
  59 public:
  60   Loader(::Loader::Context *ctx);
  61   ~Loader();
  62
  63   lua_State* state() const { return m_state; }
  64   bool runFile(const QString& file, bool set_dir = true);
  65
  66   template<typename T> T getValue(const QString& key, int size = 0, bool allow_nil = false);
  67
  68   bool error(){ return m_error; }
  69   void clearError(){ m_error = false; }
  70   QString errorString(){ return m_error_string; }
  71 };
  72
  73 } // namespace LuaLoader
  74
  75
  76 #endif // LUAAPI__LOADERAPI_H