Carlos Florêncio
88 lines
3.0 KiB
TypeScript
88 lines
3.0 KiB
TypeScript
"use client";
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import * as React from "react";
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import { useTranslation } from "react-i18next";
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import { firstAnimationListValue, parseCssTime } from "@kandev/ui/animation-utils";
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type GridSpinnerProps = {
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className?: string;
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};
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const gridKeyframes: Keyframe[] = [
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{ offset: 0, transform: "scale3d(0.5, 0.5, 1)" },
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{ offset: 0.35, transform: "scale3d(0, 0, 1)" },
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{ offset: 0.7, transform: "scale3d(0.5, 0.5, 1)" },
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{ offset: 1, transform: "scale3d(0.5, 0.5, 1)" },
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];
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const useCompositorEffect = typeof window === "undefined" ? React.useEffect : React.useLayoutEffect;
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export function GridSpinner({ className }: GridSpinnerProps) {
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const { t } = useTranslation();
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const gridRef = React.useRef<HTMLSpanElement>(null);
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useCompositorEffect(() => {
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const cubes = Array.from(
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gridRef.current?.querySelectorAll<HTMLElement>(".spinner-grid-cube") ?? [],
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);
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const animations = startGridAnimations(cubes);
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if (!animations) return;
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for (const cube of cubes) cube.style.animation = "none";
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return () => {
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for (const animation of animations) animation.cancel();
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for (const cube of cubes) cube.style.removeProperty("animation");
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};
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}, []);
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return (
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<span
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ref={gridRef}
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className={`spinner-grid ${className ?? ""}`}
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role="status"
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aria-label={t("common:loadingIndicatorLabel")}
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>
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<span className="spinner-grid-cube" />
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<span className="spinner-grid-cube" />
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<span className="spinner-grid-cube" />
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<span className="spinner-grid-cube" />
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<span className="spinner-grid-cube" />
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<span className="spinner-grid-cube" />
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<span className="spinner-grid-cube" />
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<span className="spinner-grid-cube" />
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<span className="spinner-grid-cube" />
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</span>
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);
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}
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function startGridAnimations(cubes: HTMLElement[]): Animation[] | null {
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if (cubes.length !== 9 || cubes.some((cube) => typeof cube.animate !== "function")) return null;
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const timing = cubes.map(readAnimationTiming);
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const validTiming = timing.filter((value): value is KeyframeAnimationOptions => value !== null);
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if (validTiming.length !== cubes.length) return null;
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const animations: Animation[] = [];
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try {
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for (let index = 0; index < cubes.length; index += 1) {
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animations.push(cubes[index].animate(gridKeyframes, validTiming[index]));
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}
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return animations;
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} catch {
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for (const animation of animations) animation.cancel();
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return null;
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}
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}
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function readAnimationTiming(cube: HTMLElement): KeyframeAnimationOptions | null {
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const computedStyle = window.getComputedStyle(cube);
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if (firstAnimationListValue(computedStyle.animationName) === "none") return null;
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const duration = parseCssTime(computedStyle.animationDuration);
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const delay = parseCssTime(computedStyle.animationDelay);
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const easing = firstAnimationListValue(computedStyle.animationTimingFunction);
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if (duration === null || duration <= 0 || delay === null || !easing) return null;
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return { delay, duration, easing, iterations: Infinity };
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}
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