Some work towards scriptable events

resources/script/interact.lua

@@ -0,0 +1,3 @@
+function interact(entity, time)
+	print('Interact! ' .. time)
+end

resources/script/test.lua

@@ -1,14 +1,20 @@
-function print_table(foo, bar)
+local function print_table(foo, bar)
    for k, v in pairs(foo) do
       print(bar .. k, v)
 
-      if type(v) == 'table' and bar .. k ~= '_G' then
-	 print_table(v, bar .. k .. '.')
-      end
+      --if type(v) == 'table' and bar .. k ~= '_G' then
+      --  print_table(v, bar .. k .. '.')
+      --end
    end
 end
 
-print_table(_G, '')
+--print(getmetatable(_G))
+--setmetatable(_G, {})
+--print_table(_G, '')
 
-print(getmetatable('').__index)
-print(string)
+print(bar)
+print(getmetatable(bar))
+
+--print(getmetatable('').bar)
+--getmetatable('').bar = 'bar'
+--print(getmetatable('').bar)

src/CMakeLists.txt

@@ -5,6 +5,7 @@ add_executable(rpgedit
   rpgedit.cpp
   control/MapContext.cpp
   control/RPGEdit.cpp
+  control/ScriptContext.cpp
   model/Map.cpp
   model/Scriptable.cpp
   view/MapView.cpp

src/control/MapContext.cpp

@@ -31,10 +31,13 @@ namespace RPGEdit {
 
 namespace Control {
 
-MapContext::MapContext(EventBus *eventBus0, InputHandler *inputHandler0, const std::shared_ptr<View::Window> &window, const Model::Map &map0)
-	: eventBus(eventBus0), inputHandler(inputHandler0), map(map0) {
+MapContext::MapContext(EventBus *eventBus0, InputHandler *inputHandler0, ScriptContext *scriptContext0, const std::shared_ptr<View::Window> &window, const Model::Map &map0)
+	: eventBus(eventBus0), inputHandler(inputHandler0), scriptContext(scriptContext0), map(map0) {
 	view = std::unique_ptr<View::MapView>(new View::MapView(window, map.getTileset()));
 
+	Model::Entity *square = map.addEntity("square", Model::Position<int>{10, 10});
+	square->setScriptInteract("interact", "interact");
+
 	playerEntity = map.addEntity("square", Model::Position<int>{8, 8});
 
 	view->updateEntities(map.getEntities());
@@ -80,7 +83,12 @@ void MapContext::interact(uint64_t time) {
 	if (!target)
 		return;
 
-	target->interact(time);
+	const std::pair<std::string, std::string> &interactScript = target->getScriptInteract();
+	if (interactScript.first.empty())
+		return;
+
+	Model::ScriptNumber scriptTime(time);
+	scriptContext->run(interactScript.first, interactScript.second, nullptr, &scriptTime);
 }
 
 void MapContext::keyPressed(uint16_t key, uint64_t time) {

src/control/MapContext.hpp

@@ -28,6 +28,7 @@
 
 #include "EventBus.hpp"
 #include "InputHandler.hpp"
+#include "ScriptContext.hpp"
 #include "../model/Map.hpp"
 #include "../view/MapView.hpp"
 
@@ -43,6 +44,7 @@ class MapContext {
 private:
 	EventBus *const eventBus;
 	InputHandler *const inputHandler;
+	ScriptContext *const scriptContext;
 
 	std::unique_ptr<View::MapView> view;
 
@@ -59,7 +61,7 @@ private:
 	}
 
 public:
-	MapContext(EventBus *eventBus0, InputHandler *inputHandler0, const std::shared_ptr<View::Window> &window, const Model::Map &map0);
+	MapContext(EventBus *eventBus0, InputHandler *inputHandler0, ScriptContext *scriptContext0, const std::shared_ptr<View::Window> &window, const Model::Map &map0);
 
 	void render(uint64_t time) {
 		view->render(&map, getViewPosition(time), time);

src/control/RPGEdit.cpp

@@ -26,7 +26,6 @@
 
 #include "RPGEdit.hpp"
 #include "MapContext.hpp"
-#include "ScriptContext.hpp"
 #include "../view/MapView.hpp"
 
 
@@ -106,7 +105,7 @@ void RPGEdit::run() {
 
 	window = std::make_shared<View::Window>();
 
-	ctx = std::make_shared<MapContext>(&eventBus, &inputHandler, window, *map);
+	ctx = std::make_shared<MapContext>(&eventBus, &inputHandler, &scriptContext, window, *map);
 
 	eventThread = std::thread([this] { eventLoop(); });
 

src/control/RPGEdit.hpp

@@ -46,6 +46,8 @@ private:
 	EventBus eventBus;
 	InputHandler inputHandler;
 
+	ScriptContext scriptContext;
+
 	std::shared_ptr<View::Window> window;
 
 	std::shared_ptr<MapContext> ctx;

src/control/ScriptContext.cpp

@@ -0,0 +1,90 @@
+/*
+  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 "ScriptContext.hpp"
+
+
+namespace RPGEdit {
+
+namespace Control {
+
+void ScriptContext::setupEnv() {
+	const std::pair<const char *, lua_CFunction> libs[] = {
+		{"_G", luaopen_base},
+		{"bit32", luaopen_bit32},
+		{"math", luaopen_math},
+		{"string", luaopen_string},
+		{"table", luaopen_table},
+	};
+
+	for (auto &lib : libs) {
+		luaL_requiref(L, lib.first, lib.second, 1);
+		lua_pop(L, 1);
+	}
+
+	for (const char *f : {"dofile", "loadfile", "require"}) {
+		lua_pushnil(L);
+		lua_setglobal(L, f);
+	}
+}
+
+void ScriptContext::cleanupEnv() {
+	lua_pushglobaltable(L);
+
+	lua_pushnil(L);
+	lua_setmetatable(L, -2);
+
+	lua_pushnil(L);
+	while (lua_next(L, -2) != 0) {
+		lua_pop(L, 1);
+
+		lua_pushvalue(L, -1);
+		lua_pushnil(L);
+
+		lua_rawset(L, -4);
+	}
+
+	lua_pop(L, 1);
+}
+
+void ScriptContext::load(const std::string &script) {
+	if (loadedScripts.count(script))
+		return;
+
+	std::string filename = "../resources/script/" + script + ".lua";
+
+	lua_rawgetp(L, LUA_REGISTRYINDEX, this);
+	lua_pushstring(L, script.c_str());
+	luaL_loadfile(L, filename.c_str());
+	lua_rawset(L, -3);
+	lua_pop(L, 1);
+
+	loadedScripts.insert(script);
+}
+
+}
+
+}

src/control/ScriptContext.hpp

@@ -36,6 +36,7 @@ extern "C" {
 
 #include <memory>
 #include <string>
+#include <unordered_set>
 
 
 namespace RPGEdit {
@@ -46,43 +47,25 @@ class ScriptContext {
 private:
 	lua_State *L;
 
-	void setupEnv() {
-		const std::pair<const char *, lua_CFunction> libs[] = {
-			{"_G", luaopen_base},
-			{"bit32", luaopen_bit32},
-			{"math", luaopen_math},
-			{"string", luaopen_string},
-			{"table", luaopen_table},
-		};
+	std::unordered_set<std::string> loadedScripts;
 
-		for (auto &lib : libs) {
-			luaL_requiref(L, lib.first, lib.second, 1);
-			lua_pop(L, 1);
+	void setupEnv();
+	void cleanupEnv();
+
+	void load(const std::string &script);
+
+	size_t pushArgs() {
+		return 0;
 	}
 
-		for (const char *f : {"dofile", "loadfile", "require"}) {
-			lua_pushnil(L);
-			lua_setglobal(L, f);
-		}
-	}
-
-	void cleanupEnv() {
-		lua_pushglobaltable(L);
-
-		lua_pushnil(L);
-		lua_setmetatable(L, -2);
-
-		lua_pushnil(L);
-		while (lua_next(L, -2) != 0) {
-			lua_pop(L, 1);
-
-			lua_pushvalue(L, -1);
+	template<typename... Args>
+	size_t pushArgs(Model::ScriptValue *v, Args ...args) {
+		if (v)
+			v->push(L);
+		else
 			lua_pushnil(L);
 
-			lua_rawset(L, -4);
-		}
-
-		lua_pop(L, 1);
+		return pushArgs(args...) + 1;
 	}
 
 public:
@@ -107,25 +90,21 @@ public:
 		lua_setglobal(L, key.c_str());
 	}
 
-	void load(const std::string &name) {
-		std::string filename = "../resources/script/" + name + ".lua";
+	template<typename... Args>
+	void run(const std::string &script, const std::string &name, Args ...args) {
+		load(script);
 
-		lua_rawgetp(L, LUA_REGISTRYINDEX, this);
-		lua_pushstring(L, name.c_str());
-		luaL_loadfile(L, filename.c_str());
-		lua_rawset(L, -3);
-		lua_pop(L, 1);
-	}
-
-	void run(const std::string &name) {
 		setupEnv();
 
 		lua_rawgetp(L, LUA_REGISTRYINDEX, this);
-		lua_getfield(L, -1, name.c_str());
+		lua_getfield(L, -1, script.c_str());
 		lua_remove(L, -2);
 
 		lua_call(L, 0, 0);
 
+		lua_getglobal(L, name.c_str());
+		lua_call(L, pushArgs(args...), 0);
+
 		cleanupEnv();
 	}
 };

src/model/Entity.hpp

@@ -28,19 +28,23 @@
 
 
 #include "Direction.hpp"
+#include "Scriptable.hpp"
 
 
 #include <string>
+#include <utility>
 
 
 namespace RPGEdit {
 
 namespace Model {
 
-class Entity {
+class Entity : public Scriptable {
 private:
 	std::string name;
 
+	std::pair<std::string, std::string> scriptInteract;
+
 	Direction direction;
 
 public:
@@ -60,8 +64,13 @@ public:
 		direction = dir;
 	}
 
-	void interact(uint64_t time) {
-		std::fprintf(stderr, "Tried to interact with `%s' entity at %llu\n", name.c_str(), (unsigned long long)time);
+	const std::pair<std::string, std::string> & getScriptInteract() const {
+		return scriptInteract;
+	}
+
+	void setScriptInteract(const std::string &script, const std::string &name) {
+		scriptInteract.first = script;
+		scriptInteract.second = name;
 	}
 };
 

src/model/ScriptValue.hpp

@@ -116,13 +116,13 @@ public:
 
 class ScriptTable : public ScriptValue {
 public:
-	typedef std::unordered_map<std::string, std::shared_ptr<ScriptValue>> MapType;
+	typedef std::unordered_map<std::shared_ptr<ScriptValue>, std::shared_ptr<ScriptValue>> MapType;
 
 private:
 	MapType value;
 
 public:
-	std::shared_ptr<ScriptValue> & operator[](const std::string &key) {
+	std::shared_ptr<ScriptValue> & operator[](const std::shared_ptr<ScriptValue> &key) {
 		return value[key];
 	}
 
@@ -130,7 +130,7 @@ public:
 		lua_createtable(L, 0, value.size());
 
 		for (const auto &entry : value) {
-			lua_pushstring(L, entry.first.c_str());
+			entry.first->push(L);
 			entry.second->push(L);
 
 			lua_settable(L, -3);