35 lines
1.2 KiB
TypeScript
35 lines
1.2 KiB
TypeScript
import { useEffect, useRef, type RefObject } from "react";
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import type { Dispatch } from "@commands/dispatcher";
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import { commandIds } from "@commands/ids";
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export function useCanvasResize(canvasRef: RefObject<HTMLCanvasElement | null>, dispatch: Dispatch) {
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const lastSize = useRef<{ w: number; h: number } | undefined>(undefined);
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useEffect(() => {
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const canvas = canvasRef.current;
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if (!canvas) return;
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let animationFrame: number | undefined;
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const resizeObserver = new ResizeObserver(([entry]) => {
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if (!entry) return;
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const width = Math.floor(entry.contentRect.width);
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const height = Math.floor(entry.contentRect.height);
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if (lastSize.current?.w === width && lastSize.current.h === height) return;
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if (animationFrame !== undefined) cancelAnimationFrame(animationFrame);
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animationFrame = requestAnimationFrame(() => {
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lastSize.current = { w: width, h: height };
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dispatch(commandIds.viewportSetSize, { w: width, h: height });
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});
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});
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resizeObserver.observe(canvas);
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return () => {
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if (animationFrame !== undefined) cancelAnimationFrame(animationFrame);
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resizeObserver.disconnect();
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};
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}, [canvasRef, dispatch]);
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}
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