molstar
Version:
A comprehensive macromolecular library.
55 lines (54 loc) • 1.49 kB
JavaScript
/**
* Copyright (c) 2020 mol* contributors, licensed under MIT, See LICENSE file for more info.
*
* @author David Sehnal <david.sehnal@gmail.com>
*/
import { LinkedList } from '../mol-data/generic';
export class CommitQueue {
constructor() {
this.removeList = LinkedList();
this.removeMap = new Map();
this.addList = LinkedList();
this.addMap = new Map();
}
get isEmpty() {
return this.removeList.count === 0 && this.addList.count === 0;
}
get size() {
return this.removeMap.size + this.addMap.size;
}
add(o) {
if (this.removeMap.has(o)) {
const a = this.removeMap.get(o);
this.removeMap.delete(o);
this.removeList.remove(a);
}
if (this.addMap.has(o))
return;
const b = this.addList.addLast(o);
this.addMap.set(o, b);
}
remove(o) {
if (this.addMap.has(o)) {
const a = this.addMap.get(o);
this.addMap.delete(o);
this.addList.remove(a);
}
if (this.removeMap.has(o))
return;
const b = this.removeList.addLast(o);
this.removeMap.set(o, b);
}
tryGetRemove() {
const o = this.removeList.removeFirst();
if (o)
this.removeMap.delete(o);
return o;
}
tryGetAdd() {
const o = this.addList.removeFirst();
if (o)
this.addMap.delete(o);
return o;
}
}