| var Backbone = require('backbone'); |
|
|
| var Main = require('../app'); |
|
|
| var mapKeycodeToKey = function(keycode) { |
| |
| var keyMap = { |
| 37: 'left', |
| 38: 'up', |
| 39: 'right', |
| 40: 'down', |
| 27: 'esc', |
| 13: 'enter' |
| }; |
| return keyMap[keycode]; |
| }; |
|
|
| function KeyboardListener(options) { |
| this.events = options.events; |
| this.aliasMap = options.aliasMap || {}; |
|
|
| if (!options.wait) { |
| this.listen(); |
| } |
| } |
|
|
| KeyboardListener.prototype.listen = function() { |
| if (this.listening) { |
| return; |
| } |
| this.listening = true; |
| Main.getEventBaton().stealBaton('docKeydown', this.keydown, this); |
| }; |
|
|
| KeyboardListener.prototype.mute = function() { |
| this.listening = false; |
| Main.getEventBaton().releaseBaton('docKeydown', this.keydown, this); |
| }; |
|
|
| KeyboardListener.prototype.keydown = function(e) { |
| var which = e.which || e.keyCode; |
|
|
| var key = mapKeycodeToKey(which); |
| if (key === undefined) { |
| return; |
| } |
|
|
| this.fireEvent(key, e); |
| }; |
|
|
| KeyboardListener.prototype.fireEvent = function(eventName, e) { |
| eventName = this.aliasMap[eventName] || eventName; |
| this.events.trigger(eventName, e); |
| }; |
|
|
| KeyboardListener.prototype.passEventBack = function(e) { |
| Main.getEventBaton().passBatonBackSoft('docKeydown', this.keydown, this, [e]); |
| }; |
|
|
| exports.KeyboardListener = KeyboardListener; |
| exports.mapKeycodeToKey = mapKeycodeToKey; |
|
|
|
|
