1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
import { Immediate } from '../util/Immediate';
import { AsyncAction } from './AsyncAction';
import { AsapScheduler } from './AsapScheduler';
import { SchedulerAction } from '../types';
/**
* We need this JSDoc comment for affecting ESDoc.
* @ignore
* @extends {Ignored}
*/
export class AsapAction<T> extends AsyncAction<T> {
constructor(protected scheduler: AsapScheduler,
protected work: (this: SchedulerAction<T>, state?: T) => void) {
super(scheduler, work);
}
protected requestAsyncId(scheduler: AsapScheduler, id?: any, delay: number = 0): any {
// If delay is greater than 0, request as an async action.
if (delay !== null && delay > 0) {
return super.requestAsyncId(scheduler, id, delay);
}
// Push the action to the end of the scheduler queue.
scheduler.actions.push(this);
// If a microtask has already been scheduled, don't schedule another
// one. If a microtask hasn't been scheduled yet, schedule one now. Return
// the current scheduled microtask id.
return scheduler.scheduled || (scheduler.scheduled = Immediate.setImmediate(
scheduler.flush.bind(scheduler, null)
));
}
protected recycleAsyncId(scheduler: AsapScheduler, id?: any, delay: number = 0): any {
// If delay exists and is greater than 0, or if the delay is null (the
// action wasn't rescheduled) but was originally scheduled as an async
// action, then recycle as an async action.
if ((delay !== null && delay > 0) || (delay === null && this.delay > 0)) {
return super.recycleAsyncId(scheduler, id, delay);
}
// If the scheduler queue is empty, cancel the requested microtask and
// set the scheduled flag to undefined so the next AsapAction will schedule
// its own.
if (scheduler.actions.length === 0) {
Immediate.clearImmediate(id);
scheduler.scheduled = undefined;
}
// Return undefined so the action knows to request a new async id if it's rescheduled.
return undefined;
}
}
|
