79 lines
1.6 KiB
JavaScript
79 lines
1.6 KiB
JavaScript
import * as I from 'immutable';
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import {compose, EventEmitter} from '@avocado/core';
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const decorate = compose(
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EventEmitter,
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);
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export class ActionRegistry extends decorate(class {}) {
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constructor() {
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super();
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this.mapActionToKey = new Map();
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this.mapKeyToAction = {};
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this.normalizer = undefined;
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this._state = I.Map();
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}
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actionForKey(key) {
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return this.mapKeyToAction[key];
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}
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listen(normalizer) {
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// Only listen once.
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if (this.normalizer) {
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return;
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}
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this.normalizer = normalizer;
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this.normalizer.on('keyUp', this.onKeyUp, this);
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this.normalizer.on('keyDown', this.onKeyDown, this);
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}
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keyForAction(action) {
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return this.mapActionToKey.get(action);
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}
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mapKeysToActions(map) {
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for (const key in map) {
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const action = map[key];
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this.mapKeyToAction[key] = action;
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this.mapActionToKey.set(action, key);
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}
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}
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onKeyDown(key) {
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if (this.mapKeyToAction[key]) {
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const action = this.mapKeyToAction[key];
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this._state = this._state.set(action, true);
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}
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}
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onKeyUp(key) {
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if (this.mapKeyToAction[key]) {
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const action = this.mapKeyToAction[key];
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this._state = this._state.delete(action);
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}
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}
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get state() {
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return this._state;
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}
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set state(state) {
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this._state = state;
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}
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stopListening(normalizer) {
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if (!this.normalizer) {
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return;
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}
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this.normalizer.off('keyUp', this.onKeyUp);
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this.normalizer.off('keyDown', this.onKeyDown);
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this.normalizer = undefined;
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}
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}
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export {InputPacket} from './packet/input.packet';
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