molstar
Version:
A comprehensive macromolecular library.
47 lines (46 loc) • 1.34 kB
JavaScript
;
/**
* Copyright (c) 2019 mol* contributors, licensed under MIT, See LICENSE file for more info.
*
* @author David Sehnal <david.sehnal@gmail.com>
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.AsyncQueue = void 0;
const array_1 = require("./array");
const rxjs_1 = require("rxjs");
class AsyncQueue {
constructor() {
this.queue = [];
this.signal = new rxjs_1.Subject();
}
get length() { return this.queue.length; }
enqueue(v) {
this.queue.push(v);
if (this.queue.length === 1)
return true;
return this.waitFor(v);
}
handled(v) {
(0, array_1.arrayRemoveInPlace)(this.queue, v);
if (this.queue.length > 0) {
this.signal.next({ v: this.queue[0], stillPresent: true });
}
}
remove(v) {
const rem = (0, array_1.arrayRemoveInPlace)(this.queue, v);
if (rem)
this.signal.next({ v, stillPresent: false });
return rem;
}
waitFor(t) {
return new Promise(res => {
const sub = this.signal.subscribe(({ v, stillPresent: removed }) => {
if (v === t) {
sub.unsubscribe();
res(removed);
}
});
});
}
}
exports.AsyncQueue = AsyncQueue;