urho3d/Extras/LuaScript/LuaScript.h

//
// Copyright (c) 2008-2013 the Urho3D project.
//
// 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.
//

#pragma once

#include "Object.h"

struct lua_State;

namespace Urho3D
{

extern const char* LOGIC_CATEGORY;

class Scene;

/// Lua script subsystem.
class LuaScript : public Object
{
    OBJECT(LuaScript);

public:
    /// Construct.
    LuaScript(Context* context);
    /// Destruct. Release the AngelLuna engine.
    ~LuaScript();    

    /// Execute lua script file.
    bool ExecuteFile(const char* fileName);
    
    /// Execute lua string.
    bool ExecuteString(const char* string);

    /// Execute lua function.
    bool ExecuteFunction(const char* funcName);

    /// Return the lua state.
    lua_State* GetLuaState() const { return luaState_; }

    /// Scene default scene.
    void SetDefaultScene(Scene* scene);
    
    /// Return default scene.
    Scene* GetDefaultScene() const;

    /// Subscribe lua event.
    void SubscribeLuaEvent(const char* event, const char* function);

private:
    /// Replace print function.
    void ReplacePrintFunction();

    /// Print function.
    static int Print(lua_State* L);
    
    /// PCall callback.
    static int PCallCallback(lua_State* L);

    /// Handle event.
    void HandleEvent(StringHash eventType, VariantMap& eventData);
    
    /// Handle a console command event.
    void HandleConsoleCommand(StringHash eventType, VariantMap& eventData);

private:
    /// Lua state.
    lua_State* luaState_;
    /// Default scene.
    WeakPtr<Scene> defaultScene_;
    /// Event type to Lua function name map.
    HashMap<StringHash, Vector<String> > eventFunctionMap_;
};

Context* GetLuaScriptContext();
void SubscribeToEvent(const char* eventType, const char* funcName);


}