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| 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 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | // Setting / Unsetting timeouts for every keystroke was a significant overhead
// Inspired from https://github.com/iostreamer-X/timeout-latch
export class TimeoutLatch {
private timeLeftMS: number;
private timeoutMS: number;
private isCancelled = false;
private isTimeExhausted = false;
private callbacks: Function[] = [];
constructor(callback: Function, timeoutMS: number) {
this.timeLeftMS = timeoutMS;
this.timeoutMS = timeoutMS;
this.callbacks.push(callback);
}
tick(): void {
if (!this.isCancelled && !this.isTimeExhausted) {
this.timeLeftMS--;
if (this.timeLeftMS <= 0) {
this.isTimeExhausted = true;
const callbacks = this.callbacks.slice();
this.callbacks.length = 0;
callbacks.forEach((callback) => {
try {
callback();
} catch (error) {
console.error('TimeoutLatch callback error:', error);
}
});
}
}
}
cancel(): void {
this.isCancelled = true;
this.callbacks.length = 0;
}
reset(): void {
this.timeLeftMS = this.timeoutMS;
this.isCancelled = false;
this.isTimeExhausted = false;
}
get isDone(): boolean {
return this.isCancelled || this.isTimeExhausted;
}
}
class Scheduler {
private interval: NodeJS.Timeout | null = null;
private latches = new Set<TimeoutLatch>();
add(latch: TimeoutLatch): void {
this.latches.add(latch);
this.start();
}
remove(latch: TimeoutLatch): void {
this.latches.delete(latch);
if (this.latches.size === 0) {
this.stop();
}
}
private start(): void {
Eif (this.interval === null) {
this.interval = setInterval(() => {
this.latches.forEach((latch) => {
latch.tick();
if (latch.isDone) {
this.remove(latch);
}
});
}, 1);
}
}
private stop(): void {
if (this.interval !== null) {
clearInterval(this.interval);
this.interval = null;
}
}
}
let globalScheduler: Scheduler | null = null;
export const getScheduler = (): Scheduler => {
Iif (typeof window === 'undefined') {
return new Scheduler();
}
Eif (!globalScheduler) {
globalScheduler = new Scheduler();
}
return globalScheduler;
};
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