work.suroh.tk/node_modules/rxjs/_esm2015/scheduler/AsyncScheduler.js

42 lines
1.2 KiB
JavaScript

import { Scheduler } from '../Scheduler';
export class AsyncScheduler extends Scheduler {
constructor() {
super(...arguments);
this.actions = [];
/**
* A flag to indicate whether the Scheduler is currently executing a batch of
* queued actions.
* @type {boolean}
*/
this.active = false;
/**
* An internal ID used to track the latest asynchronous task such as those
* coming from `setTimeout`, `setInterval`, `requestAnimationFrame`, and
* others.
* @type {any}
*/
this.scheduled = undefined;
}
flush(action) {
const { actions } = this;
if (this.active) {
actions.push(action);
return;
}
let error;
this.active = true;
do {
if (error = action.execute(action.state, action.delay)) {
break;
}
} while (action = actions.shift()); // exhaust the scheduler queue
this.active = false;
if (error) {
while (action = actions.shift()) {
action.unsubscribe();
}
throw error;
}
}
}
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