molstar
Version:
A comprehensive macromolecular library.
51 lines (50 loc) • 1.65 kB
JavaScript
/**
* Copyright (c) 2019 mol* contributors, licensed under MIT, See LICENSE file for more info.
*
* @author David Sehnal <david.sehnal@gmail.com>
*/
import { arrayRemoveInPlace } from './array';
import { Subject } from 'rxjs';
var AsyncQueue = /** @class */ (function () {
function AsyncQueue() {
this.queue = [];
this.signal = new Subject();
}
Object.defineProperty(AsyncQueue.prototype, "length", {
get: function () { return this.queue.length; },
enumerable: false,
configurable: true
});
AsyncQueue.prototype.enqueue = function (v) {
this.queue.push(v);
if (this.queue.length === 1)
return true;
return this.waitFor(v);
};
AsyncQueue.prototype.handled = function (v) {
arrayRemoveInPlace(this.queue, v);
if (this.queue.length > 0) {
this.signal.next({ v: this.queue[0], stillPresent: true });
}
};
AsyncQueue.prototype.remove = function (v) {
var rem = arrayRemoveInPlace(this.queue, v);
if (rem)
this.signal.next({ v: v, stillPresent: false });
return rem;
};
AsyncQueue.prototype.waitFor = function (t) {
var _this = this;
return new Promise(function (res) {
var sub = _this.signal.subscribe(function (_a) {
var v = _a.v, removed = _a.stillPresent;
if (v === t) {
sub.unsubscribe();
res(removed);
}
});
});
};
return AsyncQueue;
}());
export { AsyncQueue };