86 lines
2 KiB
TypeScript
86 lines
2 KiB
TypeScript
import * as dom from '../shared/utils/dom';
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import Key, * as keys from './domains/Key';
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const cancelKey = (e: KeyboardEvent): boolean => {
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if (e.key === 'Escape') {
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return true;
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}
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if (e.key === '[' && e.ctrlKey) {
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return true;
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}
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return false;
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};
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export default class InputDriver {
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private pressed: {[key: string]: string} = {};
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private onKeyListeners: ((key: Key) => boolean)[] = [];
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constructor(target: HTMLElement) {
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this.pressed = {};
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this.onKeyListeners = [];
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target.addEventListener('keypress', this.onKeyPress.bind(this));
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target.addEventListener('keydown', this.onKeyDown.bind(this));
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target.addEventListener('keyup', this.onKeyUp.bind(this));
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}
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onKey(cb: (key: Key) => boolean) {
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this.onKeyListeners.push(cb);
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}
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private onKeyPress(e: KeyboardEvent) {
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if (this.pressed[e.key] && this.pressed[e.key] !== 'keypress') {
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return;
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}
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this.pressed[e.key] = 'keypress';
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this.capture(e);
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}
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private onKeyDown(e: KeyboardEvent) {
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if (this.pressed[e.key] && this.pressed[e.key] !== 'keydown') {
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return;
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}
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this.pressed[e.key] = 'keydown';
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this.capture(e);
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}
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private onKeyUp(e: KeyboardEvent) {
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delete this.pressed[e.key];
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}
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// eslint-disable-next-line max-statements
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private capture(e: KeyboardEvent) {
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let target = e.target;
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if (!(target instanceof HTMLElement)) {
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return;
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}
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if (this.fromInput(target)) {
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if (cancelKey(e) && target.blur) {
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target.blur();
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}
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return;
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}
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if (['Shift', 'Control', 'Alt', 'OS'].includes(e.key)) {
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// pressing only meta key is ignored
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return;
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}
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let key = keys.fromKeyboardEvent(e);
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for (let listener of this.onKeyListeners) {
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let stop = listener(key);
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if (stop) {
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e.preventDefault();
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e.stopPropagation();
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break;
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}
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}
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}
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private fromInput(e: Element) {
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return e instanceof HTMLInputElement ||
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e instanceof HTMLTextAreaElement ||
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e instanceof HTMLSelectElement ||
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dom.isContentEditable(e);
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}
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}
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