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use crate::{prelude::JsObject, Context, JsResult, JsValue};
use gc::{Finalize, Trace};
/// `JobCallback` records
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-jobcallback-records
#[derive(Debug, Clone, Trace, Finalize)]
pub struct JobCallback {
callback: JsObject,
}
impl JobCallback {
/// `HostMakeJobCallback ( callback )`
///
/// The host-defined abstract operation `HostMakeJobCallback` takes argument `callback` (a
/// function object) and returns a `JobCallback` Record.
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-hostmakejobcallback
pub fn make_job_callback(callback: JsObject) -> Self {
// 1. Return the JobCallback Record { [[Callback]]: callback, [[HostDefined]]: empty }.
Self { callback }
}
/// `HostCallJobCallback ( jobCallback, V, argumentsList )`
///
/// The host-defined abstract operation `HostCallJobCallback` takes arguments `jobCallback` (a
/// `JobCallback` Record), `V` (an ECMAScript language value), and `argumentsList` (a `List` of
/// ECMAScript language values) and returns either a normal completion containing an ECMAScript
/// language value or a throw completion.
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-hostcalljobcallback
pub fn call_job_callback(
&self,
v: &JsValue,
arguments_list: &[JsValue],
context: &mut Context,
) -> JsResult<JsValue> {
// It must perform and return the result of Call(jobCallback.[[Callback]], V, argumentsList).
// 1. Assert: IsCallable(jobCallback.[[Callback]]) is true.
assert!(
self.callback.is_callable(),
"the callback of the job callback was not callable"
);
// 2. Return ? Call(jobCallback.[[Callback]], V, argumentsList).
self.callback.__call__(v, arguments_list, context)
}
}