RBXScriptSignal

This commit is contained in:
Quaternions 2024-10-17 12:50:13 -07:00
parent 43ab764b18
commit 420907a14a
2 changed files with 74 additions and 1 deletions

View File

@ -7,7 +7,8 @@ mod color3;
mod cframe;
mod vector3;
pub mod instance;
mod number_sequence;
mod script_signal;
mod color_sequence;
mod number_sequence;
pub use runner::{Runner,Runnable,Error};

View File

@ -0,0 +1,72 @@
use std::{cell::RefCell,rc::Rc};
#[derive(Clone)]
pub struct ScriptSignal{
// Emulate the garbage roblox api.
// ScriptConnection should not exist.
// :Disconnect should be a method on ScriptSignal, and this would be avoided entirely.
callbacks:Rc<RefCell<Vec<mlua::Function>>>,
}
pub struct ScriptConnection{
signal:ScriptSignal,
function:mlua::Function,
}
impl ScriptSignal{
pub fn new()->Self{
Self{
callbacks:Rc::new(RefCell::new(Vec::new())),
}
}
// This eats the Lua error
pub fn fire(&self,args:mlua::MultiValue){
// Make a copy of the list in case Lua attempts to modify it during the loop
let functions=self.callbacks.borrow().clone();
for function in functions{
//wee let's allocate for our function calls
if let Err(e)=function.call::<mlua::MultiValue>(args.clone()){
println!("Script Signal Error: {e}");
}
}
}
pub fn connect(&self,function:mlua::Function)->ScriptConnection{
self.callbacks.borrow_mut().push(function.clone());
ScriptConnection{
signal:self.clone(),
function,
}
}
}
impl ScriptConnection{
pub fn position(&self)->Option<usize>{
self.signal.callbacks.borrow().iter().position(|function|function==&self.function)
}
}
impl mlua::UserData for ScriptSignal{
fn add_methods<M:mlua::UserDataMethods<Self>>(methods:&mut M){
methods.add_method("Connect",|_lua,this,f:mlua::Function|
Ok(this.connect(f))
);
// Fire is not allowed to be called from Lua
// methods.add_method("Fire",|_lua,this,args:mlua::MultiValue|
// Ok(this.fire(args))
// );
}
}
//type_from_lua_userdata!(ScriptSignal);
impl mlua::UserData for ScriptConnection{
fn add_fields<F:mlua::UserDataFields<Self>>(fields:&mut F){
fields.add_field_method_get("Connected",|_,this|{
Ok(this.position().is_some())
});
}
fn add_methods<M:mlua::UserDataMethods<Self>>(methods:&mut M){
methods.add_method("Disconnect",|_,this,_:()|{
if let Some(index)=this.position(){
this.signal.callbacks.borrow_mut().remove(index);
}
Ok(())
});
}
}