main/handler/KeyboardHandler.js

import { GameState } from 'GameState';

export class KeyboardHandler {

    static get KEYS() {
        return {
            BACKSPACE: 8,
            TAB: 9,
            ENTER: 13,
            SHIFT: 16,
            CTRL: 17,
            ALT: 18,
            PAUSE_BREAK: 19,
            CAPS_LOCK: 20,
            ESCAPE: 27,
            SPACE: 32,
            PAGE_UP: 33,
            PAGE_DOWN: 34,
            END: 35,
            HOME: 36,
            LEFT_ARROW: 37,
            UP_ARROW: 38,
            RIGHT_ARROW: 39,
            DOWN_ARROW: 40,
            INSERT: 45,
            DELETE: 46,
            NUM_0: 48,
            NUM_1: 49,
            NUM_2: 50,
            NUM_3: 51,
            NUM_4: 52,
            NUM_5: 53,
            NUM_6: 54,
            NUM_7: 55,
            NUM_8: 56,
            NUM_9: 57,
            A: 65,
            B: 66,
            C: 67,
            D: 68,
            E: 69,
            F: 70,
            G: 71,
            H: 72,
            I: 73,
            J: 74,
            K: 75,
            L: 76,
            M: 77,
            N: 78,
            O: 79,
            P: 80,
            Q: 81,
            R: 82,
            S: 83,
            T: 84,
            U: 85,
            V: 86,
            W: 87,
            X: 88,
            Y: 89,
            Z: 90,
            LEFT_WINDOW: 91,
            RIGHT_WINDOW: 92,
            SELECT_KEY: 93,
            NUMPAD_0: 96,
            NUMPAD_1: 97,
            NUMPAD_2: 98,
            NUMPAD_3: 99,
            NUMPAD_4: 100,
            NUMPAD_5: 101,
            NUMPAD_6: 102,
            NUMPAD_7: 103,
            NUMPAD_8: 104,
            NUMPAD_9: 105,
            MULTIPLY: 106,
            ADD: 107,
            SUBTRACT: 109,
            DECIMAL_POINT: 110,
            DIVIDE: 111,
            F1: 112,
            F2: 113,
            F3: 114,
            F4: 115,
            F5: 116,
            F6: 117,
            F7: 118,
            F8: 119,
            F9: 120,
            F10: 121,
            F11: 122,
            F12: 123,
            NUM_LOCK: 144,
            SCROLL_LOCK: 145,
            SEMICOLON: 186,
            EQUAL_SIGN: 187,
            COMMA: 188,
            DASH: 189,
            PERIOD: 190,
            FORWARD_SLASH: 191,
            GRAVE_ACCENT: 192,
            OPEN_BRACKET: 219,
            BACK_SLASH: 220,
            CLOSE_BRAKET: 221,
            SINGLE_QUOTE: 222
        }
    }

    constructor() {
        // TODO: Ver como registrar os eventos apenas para o canvas (domElement)

        this._keys = new Map();

        window.addEventListener('keyup', (event) => {
            event.stopPropagation();
            this._keys.delete(event.keyCode);
        }, false);

        window.addEventListener('keydown', (event) => {
            event.stopPropagation();
            if (event.keyCode === KeyboardHandler.KEYS.BACKSPACE ||
                event.keyCode === KeyboardHandler.KEYS.UP_ARROW ||
                event.keyCode === KeyboardHandler.KEYS.DOWN_ARROW ||
                event.keyCode === KeyboardHandler.KEYS.LEFT_ARROW ||
                event.keyCode === KeyboardHandler.KEYS.RIGHT_ARROW ||
                event.keyCode === KeyboardHandler.KEYS.PAGE_UP ||
                event.keyCode === KeyboardHandler.KEYS.PAGE_DOWN ||
                event.keyCode === KeyboardHandler.KEYS.SPACE) {
                event.preventDefault();
            }
            this._keys.set(event.keyCode, GameState.time);
        }, false);
    }

    isDown(key) {
        return this._keys.get(key);
    }

}