Implement mappings for Lua types

src/CMakeLists.txt

@@ -6,6 +6,7 @@ add_executable(rpgedit
   control/MapContext.cpp
   control/RPGEdit.cpp
   model/Map.cpp
+  model/Scriptable.cpp
   view/MapView.cpp
   view/SpriteCache.cpp
 )

src/control/ScriptContext.hpp

@@ -26,6 +26,8 @@
 
 #pragma once
 
+#include "../model/ScriptValue.hpp"
+
 extern "C" {
 #include <lua.h>
 #include <lualib.h>
@@ -100,6 +102,11 @@ public:
 		lua_close(L);
 	}
 
+	void setGlobal(const std::string &key, Model::ScriptValue *value) {
+		value->push(L);
+		lua_setglobal(L, key.c_str());
+	}
+
 	void load(const std::string &name) {
 		std::string filename = "../resources/script/" + name + ".lua";
 

src/model/ScriptValue.hpp

@@ -0,0 +1,143 @@
+/*
+  Copyright (c) 2014, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+extern "C" {
+#include <lua.h>
+#include <lualib.h>
+#include <lauxlib.h>
+}
+
+#include <memory>
+#include <string>
+#include <unordered_map>
+
+namespace RPGEdit {
+
+namespace Model {
+
+class ScriptValue {
+public:
+	virtual void push(lua_State *L) = 0;
+
+	virtual ~ScriptValue() {}
+};
+
+
+class ScriptBoolean : public ScriptValue {
+private:
+	bool value;
+
+public:
+	ScriptBoolean(bool value0) : value(value0) {
+	}
+
+	ScriptBoolean & operator=(bool newValue) {
+		value = newValue;
+		return *this;
+	}
+
+	operator bool() const {
+		return value;
+	}
+
+	virtual void push(lua_State *L) {
+		lua_pushboolean(L, value);
+	}
+};
+
+class ScriptNumber : public ScriptValue {
+private:
+	lua_Number value;
+
+public:
+	ScriptNumber(lua_Number value0) : value(value0) {
+	}
+
+	ScriptNumber & operator=(lua_Number newValue) {
+		value = newValue;
+		return *this;
+	}
+
+	operator lua_Number() const {
+		return value;
+	}
+
+	virtual void push(lua_State *L) {
+		lua_pushnumber(L, value);
+	}
+};
+
+class ScriptString : public ScriptValue {
+private:
+	std::string value;
+
+public:
+	ScriptString(std::string &value0) : value(value0) {
+	}
+
+	ScriptString & operator=(std::string &newValue) {
+		value = newValue;
+		return *this;
+	}
+
+	operator std::string &() {
+		return value;
+	}
+
+	virtual void push(lua_State *L) {
+		lua_pushstring(L, value.c_str());
+	}
+};
+
+class ScriptTable : public ScriptValue {
+public:
+	typedef std::unordered_map<std::string, std::shared_ptr<ScriptValue>> MapType;
+
+private:
+	MapType value;
+
+public:
+	std::shared_ptr<ScriptValue> & operator[](const std::string &key) {
+		return value[key];
+	}
+
+	virtual void push(lua_State *L) {
+		lua_createtable(L, 0, value.size());
+
+		for (const auto &entry : value) {
+			lua_pushstring(L, entry.first.c_str());
+			entry.second->push(L);
+
+			lua_settable(L, -3);
+		}
+	}
+};
+
+}
+
+}

src/model/Scriptable.cpp

@@ -0,0 +1,58 @@
+/*
+  Copyright (c) 2014, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#include "Scriptable.hpp"
+
+
+namespace RPGEdit {
+
+namespace Model {
+
+int Scriptable::gc(lua_State *L) {
+	std::shared_ptr<ScriptValue> *value = static_cast<std::shared_ptr<ScriptValue> *>(lua_touserdata(L, -1));
+
+	value->~shared_ptr<ScriptValue>();
+
+	return 0;
+}
+
+void Scriptable::setupMetatable(lua_State *L) {
+	if (luaL_newmetatable(L, "RPGEdit::Model::Scriptable")) {
+		lua_pushstring(L, "__metatable");
+		lua_pushstring(L, "protected");
+		lua_rawset(L, -3);
+
+		lua_pushstring(L, "__gc");
+		lua_pushcfunction(L, &gc);
+		lua_rawset(L, -3);
+	}
+
+	lua_setmetatable(L, -2);
+}
+
+}
+
+}

src/model/Scriptable.hpp

@@ -0,0 +1,57 @@
+/*
+  Copyright (c) 2014, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+
+#include "ScriptValue.hpp"
+
+#include <new>
+
+
+namespace RPGEdit {
+
+namespace Model {
+
+class Scriptable : public ScriptValue, public std::enable_shared_from_this<Scriptable> {
+private:
+	static int gc(lua_State *L);
+
+	void setupMetatable(lua_State *L);
+
+public:
+	virtual void push(lua_State *L) {
+
+		void *ptr = lua_newuserdata(L, sizeof(std::shared_ptr<ScriptValue>));
+		setupMetatable(L);
+
+		new (ptr) std::shared_ptr<ScriptValue>(shared_from_this());
+	}
+};
+
+}
+
+}