@rtsdk/lance-topia
Version:
A Node.js based real-time multiplayer game server
280 lines (258 loc) • 7.44 kB
JavaScript
// based on http://keycode.info/
// keyboard handling
const keyCodeTable = {
3: 'break',
8: 'backspace', // backspace / delete
9: 'tab',
12: 'clear',
13: 'enter',
16: 'shift',
17: 'ctrl',
18: 'alt',
19: 'pause/break',
20: 'caps lock',
27: 'escape',
28: 'conversion',
29: 'non-conversion',
32: 'space',
33: 'page up',
34: 'page down',
35: 'end',
36: 'home',
37: 'left',
38: 'up',
39: 'right',
40: 'down',
41: 'select',
42: 'print',
43: 'execute',
44: 'Print Screen',
45: 'insert',
46: 'delete',
48: '0',
49: '1',
50: '2',
51: '3',
52: '4',
53: '5',
54: '6',
55: '7',
56: '8',
57: '9',
58: ':',
59: 'semicolon (firefox), equals',
60: '<',
61: 'equals (firefox)',
63: 'ß',
64: '@',
65: 'a',
66: 'b',
67: 'c',
68: 'd',
69: 'e',
70: 'f',
71: 'g',
72: 'h',
73: 'i',
74: 'j',
75: 'k',
76: 'l',
77: 'm',
78: 'n',
79: 'o',
80: 'p',
81: 'q',
82: 'r',
83: 's',
84: 't',
85: 'u',
86: 'v',
87: 'w',
88: 'x',
89: 'y',
90: 'z',
91: 'Windows Key / Left ⌘ / Chromebook Search key',
92: 'right window key',
93: 'Windows Menu / Right ⌘',
96: 'numpad 0',
97: 'numpad 1',
98: 'numpad 2',
99: 'numpad 3',
100: 'numpad 4',
101: 'numpad 5',
102: 'numpad 6',
103: 'numpad 7',
104: 'numpad 8',
105: 'numpad 9',
106: 'multiply',
107: 'add',
108: 'numpad period (firefox)',
109: 'subtract',
110: 'decimal point',
111: 'divide',
112: 'f1',
113: 'f2',
114: 'f3',
115: 'f4',
116: 'f5',
117: 'f6',
118: 'f7',
119: 'f8',
120: 'f9',
121: 'f10',
122: 'f11',
123: 'f12',
124: 'f13',
125: 'f14',
126: 'f15',
127: 'f16',
128: 'f17',
129: 'f18',
130: 'f19',
131: 'f20',
132: 'f21',
133: 'f22',
134: 'f23',
135: 'f24',
144: 'num lock',
145: 'scroll lock',
160: '^',
161: '!',
163: '#',
164: '$',
165: 'ù',
166: 'page backward',
167: 'page forward',
169: 'closing paren (AZERTY)',
170: '*',
171: '~ + * key',
173: 'minus (firefox), mute/unmute',
174: 'decrease volume level',
175: 'increase volume level',
176: 'next',
177: 'previous',
178: 'stop',
179: 'play/pause',
180: 'e-mail',
181: 'mute/unmute (firefox)',
182: 'decrease volume level (firefox)',
183: 'increase volume level (firefox)',
186: 'semi-colon / ñ',
187: 'equal sign',
188: 'comma',
189: 'dash',
190: 'period',
191: 'forward slash / ç',
192: 'grave accent / ñ / æ',
193: '?, / or °',
194: 'numpad period (chrome)',
219: 'open bracket',
220: 'back slash',
221: 'close bracket / å',
222: 'single quote / ø',
223: '`',
224: 'left or right ⌘ key (firefox)',
225: 'altgr',
226: '< /git >',
230: 'GNOME Compose Key',
231: 'ç',
233: 'XF86Forward',
234: 'XF86Back',
240: 'alphanumeric',
242: 'hiragana/katakana',
243: 'half-width/full-width',
244: 'kanji',
255: 'toggle touchpad'
};
/**
* This class allows easy usage of device keyboard controls. Use the method {@link KeyboardControls#bindKey} to
* generate events whenever a key is pressed.
*
* @example
* // in the ClientEngine constructor
* this.controls = new KeyboardControls(this);
* this.controls.bindKey('left', 'left', { repeat: true } );
* this.controls.bindKey('right', 'right', { repeat: true } );
* this.controls.bindKey('space', 'space');
*
*/
class KeyboardControls {
constructor(clientEngine) {
this.clientEngine = clientEngine;
this.gameEngine = clientEngine.gameEngine;
this.setupListeners();
// keep a reference for key press state
this.keyState = {};
// a list of bound keys and their corresponding actions
this.boundKeys = {};
this.gameEngine.on('client__preStep', () => {
for (let keyName of Object.keys(this.boundKeys)) {
if (this.keyState[keyName] && this.keyState[keyName].isDown) {
// handle repeat press
if (this.boundKeys[keyName].options.repeat || this.keyState[keyName].count == 0) {
// callback to get live parameters if function
let parameters = this.boundKeys[keyName].parameters;
if (typeof parameters === "function") {
parameters = parameters();
}
// todo movement is probably redundant
let inputOptions = Object.assign({
movement: true
}, parameters || {});
this.clientEngine.sendInput(this.boundKeys[keyName].actionName, inputOptions);
this.keyState[keyName].count++;
}
}
}
});
}
setupListeners() {
document.addEventListener('keydown', (e) => { this.onKeyChange(e, true);});
document.addEventListener('keyup', (e) => { this.onKeyChange(e, false);});
}
/**
* Bind a keyboard key to a Lance client event. Each time the key is pressed,
* an event will be transmitted by the client engine, using {@link ClientEngine#sendInput},
* and the specified event name.
*
* Common key names: up, down, left, right, enter, shift, ctrl, alt,
* escape, space, page up, page down, end, home, 0..9, a..z, A..Z.
* For a full list, please check the source link above.
*
* @param {String} keys - keyboard key (or array of keys) which will cause the event.
* @param {String} actionName - the event name
* @param {Object} options - options object
* @param {Boolean} options.repeat - if set to true, an event continues to be sent on each game step, while the key is pressed
* @param {Object/Function} parameters - parameters (or function to get parameters) to be sent to
* the server with sendInput as the inputOptions
*/
bindKey(keys, actionName, options, parameters) {
if (!Array.isArray(keys)) keys = [keys];
let keyOptions = Object.assign({
repeat: false
}, options);
keys.forEach(keyName => {
this.boundKeys[keyName] = { actionName, options: keyOptions, parameters: parameters };
});
}
// todo implement unbindKey
onKeyChange(e, isDown) {
e = e || window.event;
let keyName = keyCodeTable[e.keyCode];
if (keyName && this.boundKeys[keyName]) {
if (this.keyState[keyName] == null) {
this.keyState[keyName] = {
count: 0
};
}
this.keyState[keyName].isDown = isDown;
// key up, reset press count
if (!isDown) this.keyState[keyName].count = 0;
// keep reference to the last key pressed to avoid duplicates
this.lastKeyPressed = isDown ? e.keyCode : null;
// this.renderer.onKeyChange({ keyName, isDown });
e.preventDefault();
}
}
}
export default KeyboardControls;