73 lines
2.5 KiB
TypeScript
73 lines
2.5 KiB
TypeScript
import React, { FunctionComponent, useEffect, useRef } from 'react';
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import dis from '../../../../dispatcher/dispatcher';
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import ICanvasEffect from './ICanvasEffect.js';
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type EffectsOverlayProps = {
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roomWidth: number;
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}
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const EffectsOverlay: FunctionComponent<EffectsOverlayProps> = ({ roomWidth }) => {
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const canvasRef = useRef<HTMLCanvasElement>(null);
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const effectsRef = useRef<Map<String, ICanvasEffect>>(new Map<String, ICanvasEffect>());
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const lazyLoadEffectModule = async (name: string): Promise<ICanvasEffect> => {
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if (!name) return null;
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let effect = effectsRef.current[name] ?? null;
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if (effect === null) {
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try {
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const { default: Effect } = await import(`./${name}`);
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effect = new Effect();
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effectsRef.current[name] = effect;
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} catch (err) {
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console.warn('Unable to load effect module at \'./${name}\'.', err)
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}
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}
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return effect;
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};
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useEffect(() => {
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const resize = () => {
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canvasRef.current.height = window.innerHeight;
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};
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const onAction = (payload: { action: string }) => {
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const actionPrefix = 'effects.';
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if (payload.action.indexOf(actionPrefix) === 0) {
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const effect = payload.action.substr(actionPrefix.length);
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lazyLoadEffectModule(effect).then((module) => module?.start(canvasRef.current));
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}
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}
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const dispatcherRef = dis.register(onAction);
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const canvas = canvasRef.current;
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canvas.height = window.innerHeight;
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window.addEventListener('resize', resize, true);
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return () => {
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dis.unregister(dispatcherRef);
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window.removeEventListener('resize', resize);
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const currentEffects = effectsRef.current;
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for (const effect in currentEffects) {
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const effectModule: ICanvasEffect = currentEffects[effect];
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if(effectModule && effectModule.isRunning) {
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effectModule.stop();
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}
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}
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};
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}, []);
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return (
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<canvas
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ref={canvasRef}
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width={roomWidth}
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style={{
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display: 'block',
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zIndex: 999999,
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pointerEvents: 'none',
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position: 'fixed',
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top: 0,
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right: 0,
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}}
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/>
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)
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}
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export default EffectsOverlay;
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