44 lines
849 B
TypeScript
44 lines
849 B
TypeScript
import { Listenable } from '../../util';
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export class InputHandler extends Listenable<[string, boolean]> {
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private readonly keys: Set<string> = new Set();
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constructor(relevantKeys: Set<string>) {
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super();
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window.addEventListener('keydown', (ev) => {
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if (!relevantKeys.has(ev.code))
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return;
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ev.preventDefault();
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if (ev.repeat)
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return;
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this.keys.add(ev.code);
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this.runListeners(ev.code, true);
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});
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window.addEventListener('keyup', (ev) => {
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if (!relevantKeys.has(ev.code))
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return;
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ev.preventDefault();
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if (!this.keys.has(ev.code))
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return;
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this.keys.delete(ev.code);
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this.runListeners(ev.code, false);
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});
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window.addEventListener('blur', () => {
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this.keys.clear();
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this.runListeners('', false);
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});
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}
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public has(key: string): boolean {
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return this.keys.has(key);
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}
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}
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