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use std::{marker::PhantomData, rc::Rc};
use super::{Disposable, SignalBase, SignalConnection};
/// An alias for Signal2 listeners.
pub type Listener2<A, B> = Rc<dyn Fn(&A, &B)>;
/// A two-argument signal. See Signal0 and Signal1 for different arities.
#[derive(Default, Clone, Debug)]
pub struct Signal2<A, B> {
pub inner: SignalBase,
marker_a: PhantomData<A>,
marker_b: PhantomData<B>,
}
impl<A, B> Signal2<A, B> {
/// @param listener An optional listener to immediately connect to the signal.
pub fn new(listener: Option<Listener2<A, B>>) -> Self {
// Self {
// inner: SignalBase::new(listener),
// marker_a: PhantomData,
// marker_b: PhantomData,
// }
todo!("should deal with it");
}
/// Connects a listener to this signal.
/// @param prioritize True if this listener should fire before others.
/// @returns A SignalConnection, that can be disposed to remove the listener.
// prioritize :bool = false
pub fn connect(&self, listener: Listener2<A, B>, prioritize: bool) -> SignalConnection {
todo!("should deal with it");
// self.inner.connect_impl(listener, prioritize)
}
/// Emit the signal, notifying each connected listener.
pub fn emit(&self, arg1: A, arg2: B) {
if self.inner.dispatching() {
todo!("should deal with it");
// self.inner.defer(Box::new(|| {
// self.emitImpl(arg1, arg2);
// }));
} else {
self.emit_impl(arg1, arg2);
}
}
fn emit_impl(&self, arg1: A, arg2: B) {
let head = self.inner.will_emit();
let p = head;
todo!("should deal with it");
// while let Some(ref val) = p {
// if let Some(listener) = val.listener {
// // (listener)(arg1, arg2); // TODO:
// }
// if !val.stayInList {
// val.dispose();
// }
// p = val.next;
// }
// self.inner.didEmit(head.unwrap());
}
}
impl<A, B> AsRef<SignalBase> for Signal2<A, B> {
fn as_ref(&self) -> &SignalBase {
&self.inner
}
}