// Generated by CoffeeScript 1.10.0
(function() {
  var Keyboard,
    extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
    hasProp = {}.hasOwnProperty;

  global(Keyboard = (function(superClass) {
    extend(Keyboard, superClass);

    function Keyboard() {
      var events, keys, pressed_keys;
      keys = ['delete', 'ctrl', 'shift'];
      events = [];
      keys.forEach(function(d) {
        events.push(d + "_down");
        return events.push(d + "_up");
      });
      Keyboard.__super__.constructor.call(this, {
        events: events
      });
      pressed_keys = {};
      document.onkeydown = (function(_this) {
        return function(e) {
          var key;
          key = _this.keyname(e.keyCode);
          if ((key != null) && !(key in pressed_keys)) {
            _this.trigger(key + '_down');
            return pressed_keys[key] = true;
          }
        };
      })(this);
      document.onkeyup = (function(_this) {
        return function(e) {
          var key;
          key = _this.keyname(e.keyCode);
          if ((key != null) && key in pressed_keys) {
            _this.trigger(key + '_up');
            return delete pressed_keys[key];
          }
        };
      })(this);
    }

    Keyboard.prototype.keyname = function(keyCode) {
      switch (keyCode) {
        case 46:
          return 'delete';
        case 17:
          return 'ctrl';
        case 16:
          return 'shift';
        default:
          return null;
      }
    };

    return Keyboard;

  })(EventSource));

}).call(this);