src/luaapi/loader.h

   1 /*
   2   Copyright (c) 2006 Paolo Capriotti <p.capriotti@gmail.com>
   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 "luaapi/luavalue.h"
  21 #include "option.h"
  22
  23 class lua_State;
  24 class luaL_Reg;
  25 class ThemeInfo;
  26
  27 namespace Loader {
  28   class Context;
  29 }
  30
  31 namespace LuaApi {
  32
  33 class RectLess {
  34 public:
  35   bool operator()(const QRect& a, const QRect& b) {
  36     return a.x() != b.x() ? a.x() < b.x() :
  37            a.y() != b.y() ? a.y() < b.y() :
  38            a.width() != b.width() ? a.width() < b.width() :
  39            a.height() < b.height();
  40   }
  41 };
  42
  43 typedef std::map<QRect, QImage, RectLess> ImageMap;
  44 typedef boost::variant<QImage, ImageMap> ImageOrMap;
  45
  46 class Loader {
  47   bool m_error;
  48   QString m_error_string;
  49
  50   lua_State* m_state;
  51   QDir m_curr_dir;
  52
  53   static const luaL_Reg lualibs[];
  54
  55   template<typename T> struct create_value_data;
  56   template<typename T> static void retrieve(create_value_data<T>*, lua_State *l, int pos);
  57   template<typename T> static int create_value_func(lua_State *l);
  58   static int import_func(lua_State* l);
  59
  60   void initialize(::Loader::Context *ctx);
  61
  62   /**
  63     * Add the theme table to the environment, with all theme metadata.
  64     */
  65   void addMetaData(const ThemeInfo& theme);
  66 public:
  67   Loader(::Loader::Context *ctx, const ThemeInfo& theme);
  68   Loader();
  69
  70   ~Loader();
  71
  72   lua_State* state() const { return m_state; }
  73   bool runFile(const QString& file, bool set_dir = true);
  74
  75   template<typename T> T getValue(const QString& key, int size = 0,
  76                             const LuaValueMap* args = NULL, bool allow_nil = false);
  77
  78   bool error() { return m_error; }
  79   void clearError() { m_error = false; }
  80   QString errorString() { return m_error_string; }
  81 };
  82
  83 } //end namespace LuaApi
  84
  85
  86 #endif // LUAAPI__LOADERAPI_H