68 lines
1.7 KiB
TypeScript
68 lines
1.7 KiB
TypeScript
import { useEffect } from '../lib/teact/teact';
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const ANIMATION_START_EVENT = 'tt-event-heavy-animation-start';
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const ANIMATION_END_EVENT = 'tt-event-heavy-animation-end';
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let timeout: number | undefined;
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let isAnimating = false;
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// Make sure to end even if end callback was not called (which was some hardly-reproducible bug)
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const AUTO_END_TIMEOUT = 1000;
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const useHeavyAnimationCheck = (
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handleAnimationStart: AnyToVoidFunction,
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handleAnimationEnd: AnyToVoidFunction,
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isDisabled = false,
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) => {
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useEffect(() => {
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if (isDisabled) {
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return undefined;
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}
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if (isAnimating) {
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handleAnimationStart();
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}
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document.addEventListener(ANIMATION_START_EVENT, handleAnimationStart);
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document.addEventListener(ANIMATION_END_EVENT, handleAnimationEnd);
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return () => {
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document.removeEventListener(ANIMATION_END_EVENT, handleAnimationEnd);
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document.removeEventListener(ANIMATION_START_EVENT, handleAnimationStart);
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};
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}, [isDisabled, handleAnimationEnd, handleAnimationStart]);
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};
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export function isHeavyAnimating() {
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return isAnimating;
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}
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export function dispatchHeavyAnimationEvent(duration = AUTO_END_TIMEOUT) {
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if (!isAnimating) {
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isAnimating = true;
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document.dispatchEvent(new Event(ANIMATION_START_EVENT));
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}
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if (timeout) {
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clearTimeout(timeout);
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timeout = undefined;
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}
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// Race condition may happen if another `dispatchHeavyAnimationEvent` is called before `onEnd`
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function onEnd() {
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if (timeout) {
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clearTimeout(timeout);
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timeout = undefined;
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}
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isAnimating = false;
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document.dispatchEvent(new Event(ANIMATION_END_EVENT));
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}
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timeout = window.setTimeout(onEnd, duration);
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return onEnd;
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}
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export default useHeavyAnimationCheck;
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