61 lines
1.7 KiB
TypeScript
61 lines
1.7 KiB
TypeScript
// Copyright 2024 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import React, { memo, useEffect, useRef } from 'react';
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import { animated, useSpring } from '@react-spring/web';
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export type StoryProgressSegmentProps = Readonly<{
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currentIndex: number;
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duration: number | null;
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index: number;
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playing: boolean;
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onFinish: () => void;
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}>;
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function isValidDuration(duration: number | null): boolean {
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return duration != null && Number.isFinite(duration) && duration > 0;
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}
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export const StoryProgressSegment = memo(function StoryProgressSegment({
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currentIndex,
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duration,
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index,
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playing,
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onFinish,
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}: StoryProgressSegmentProps): JSX.Element {
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const onFinishRef = useRef(onFinish);
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useEffect(() => {
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onFinishRef.current = onFinish;
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}, [onFinish]);
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const [progressBarStyle] = useSpring(() => {
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return {
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immediate: index !== currentIndex,
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// Pause while we are waiting for a valid duration
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pause: !playing || !isValidDuration(duration),
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from: { x: index < currentIndex ? 1 : 0 },
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to: { x: index <= currentIndex ? 1 : 0 },
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config: { duration: duration ?? Infinity },
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onRest: result => {
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if (index === currentIndex && result.finished) {
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onFinishRef.current();
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}
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},
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};
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}, [index, playing, currentIndex, duration]);
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return (
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<div
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className="StoryProgressSegment"
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aria-current={index === currentIndex ? 'step' : false}
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>
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<animated.div
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className="StoryProgressSegment__bar"
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style={{
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transform: progressBarStyle.x.to(
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value => `translateX(${value * 100 - 100}%)`
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),
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}}
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/>
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</div>
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);
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});
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