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