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/*
===========================================================================
Copyright (C) 2025 the OpenMoHAA team
This file is part of OpenMoHAA source code.
OpenMoHAA source code is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
OpenMoHAA source code is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OpenMoHAA source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
// scriptdelegate -- manages function delegate
#include "../qcommon/listener.h"
#include "../qcommon/delegate.h"
#include "gamescript.h"
class ScriptRegisteredDelegate
{
public:
void Execute(Listener *object, const Event& ev);
};
/**
* Registered delegate, for scripts.
* It contains a ScriptThreadLabel with the game script and the label to execute.
*/
class ScriptRegisteredDelegate_Script : public ScriptRegisteredDelegate
{
public:
ScriptRegisteredDelegate_Script(const ScriptThreadLabel& inLabel);
ScriptVariable Execute(Listener *object, const Event& ev);
bool operator==(const ScriptRegisteredDelegate_Script& registeredDelegate) const;
private:
ScriptThreadLabel label;
};
/**
* Registered delegate, for code use.
* It contains the function to execute.
*/
class ScriptRegisteredDelegate_Code : public ScriptRegisteredDelegate
{
public:
using DelegateResponse = void (*)(Listener *object, const Event& ev);
public:
ScriptRegisteredDelegate_Code(DelegateResponse inResponse);
void Execute(Listener *object, const Event& ev);
bool operator==(const ScriptRegisteredDelegate_Code& registeredDelegate) const;
private:
DelegateResponse response;
};
/**
* Registered delegate, for code use.
* It contains the object along the member function to execute.
* The function will not be executed if the object is NULL.
*/
class ScriptRegisteredDelegate_CodeMember : public ScriptRegisteredDelegate
{
public:
using DelegateClassResponse = void (Class::*)(Listener *object, const Event& ev);
public:
ScriptRegisteredDelegate_CodeMember(Class *inObject, DelegateClassResponse inResponse);
void Execute(Listener *object, const Event& ev);
bool operator==(const ScriptRegisteredDelegate_CodeMember& registeredDelegate) const;
private:
SafePtr<Class> object;
DelegateClassResponse response;
};
/**
* A script delegate provides a way for code to subscribe for events.
* Scripts and code can register for a delegate and have their function executed
* when the delegate gets triggered.
*/
class ScriptDelegate
{
public:
ScriptDelegate(const char *name, const char *description);
~ScriptDelegate();
static const ScriptDelegate *GetRoot();
const ScriptDelegate *GetNext() const;
/**
* Register a script label.
*
* @param label The label to be executed
*/
void Register(const ScriptThreadLabel& label);
/**
* Unregistered the label.
*
* @param label The label to unregister
*/
void Unregister(const ScriptThreadLabel& label);
/**
* Register a function.
*
* @param response The function to be executed
*/
void Register(ScriptRegisteredDelegate_Code::DelegateResponse response);
/**
* Unregistered the function.
*
* @param response the function to unregister
*/
void Unregister(ScriptRegisteredDelegate_Code::DelegateResponse response);
/**
* Register with an object and a member function.
*
* @param object The object to notify
* @param response The member function of the object to be executed
*/
void Register(Class *object, ScriptRegisteredDelegate_CodeMember::DelegateClassResponse response);
/**
* Unregistered the member function.
*
* @param object The object where the member function is
* @param response The member function to unregister
*/
void Unregister(Class *object, ScriptRegisteredDelegate_CodeMember::DelegateClassResponse response);
/**
* Executes all registered delegates with the specified event.
*
* @param ev Parameter list
*/
ScriptVariable Trigger(const Event& ev = Event()) const;
/**
* Executes all registered delegates with the specified event.
*
* @param ev Parameter list
*/
ScriptVariable Trigger(Listener *object, const Event& ev = Event()) const;
/**
* Reset the delegate, unregister callbacks.
*/
void Reset();
/**
* Search and return the specified script delegate by name.
*
* @param name The name to search for
*/
static ScriptDelegate *GetScriptDelegate(const char *name);
static void ResetAllDelegates();
// non-movable and non-copyable
ScriptDelegate(ScriptDelegate&& other) = delete;
ScriptDelegate& operator=(ScriptDelegate&& other) = delete;
ScriptDelegate(const ScriptDelegate& other) = delete;
ScriptDelegate& operator=(const ScriptDelegate& other) = delete;
private:
// Linked-list
ScriptDelegate *next;
ScriptDelegate *prev;
static ScriptDelegate *root;
const char *name;
const char *description;
Container<ScriptRegisteredDelegate_Script> list_script;
Container<ScriptRegisteredDelegate_Code> list_code;
Container<ScriptRegisteredDelegate_CodeMember> list_codeMember;
};
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