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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 | 268x 46x 46x 22x 22x 48x 24x 24x 1x 192x 192x 18x 18x 6x 6x 18x 18x 4x 4x 4x 3x 4x | /**
* A trailing-edge debouncer: {@link schedule} (re)arms a timer and the callback
* runs once the calls stop for the configured delay. Replaces the hand-rolled
* clear/set/dispose timer bookkeeping that otherwise accumulates per call site.
*/
export class Debouncer {
private _timer: ReturnType<typeof setTimeout> | undefined;
/**
* @param _delayMs The trailing delay in milliseconds.
*/
constructor(private readonly _delayMs: number) { }
/**
* Schedules the callback, resetting any pending timer. Only the callback of
* the most recent call runs.
*/
schedule(callback: () => void): void {
this.cancel();
this._timer = setTimeout(() => {
this._timer = undefined;
callback();
}, this._delayMs);
}
/**
* Cancels the pending callback, if any.
*/
cancel(): void {
if (this._timer) {
clearTimeout(this._timer);
this._timer = undefined;
}
}
dispose(): void {
this.cancel();
}
}
/**
* A trailing-edge debouncer with one independent timer per key (e.g. per
* document URI), so bursts on one key do not delay another.
*/
export class KeyedDebouncer<K = string> {
private readonly _timers = new Map<K, ReturnType<typeof setTimeout>>();
/**
* @param _delayMs The trailing delay in milliseconds.
*/
constructor(private readonly _delayMs: number) { }
/**
* Schedules the callback for a key, resetting that key's pending timer. Only
* the callback of the most recent call per key runs.
*/
schedule(key: K, callback: () => void): void {
this.cancel(key);
this._timers.set(key, setTimeout(() => {
this._timers.delete(key);
callback();
}, this._delayMs));
}
/**
* Cancels the pending callback for a key, if any.
*/
cancel(key: K): void {
const timer = this._timers.get(key);
if (timer) {
clearTimeout(timer);
this._timers.delete(key);
}
}
dispose(): void {
for (const timer of this._timers.values()) {
clearTimeout(timer);
}
this._timers.clear();
}
}
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