http://groups.google.com/group/ubiquity-firefox/t/bddc83fc1b10dfd

toggle-chat-mode.ubiq.js

CmdUtils.CreateCommand({
  name: 'toggle chat mode',
  execute: function tcm_execute(){
    var {gUbiquity} = context.chromeWindow;
    var on = gUbiquity._tcmState ^= 1;
    gUbiquity.msgPanel.removeEventListener('keypress',
                                           gUbiquity._tcmListener,
                                           true);
    if(on){
      gUbiquity.msgPanel.addEventListener('keypress', this._listener, true);
      gUbiquity._tcmListener = this._listener;
    }
    gUbiquity[(on ? 'open' : 'close') + 'Window']();
    displayMessage(on ? 'on' : 'off', this);
  },
  preview: function tcm_preview(pb){
    pb.innerHTML = ((context.chromeWindow.gUbiquity._tcmState ? 'Dis' : 'En')
                    + 'ables chat mode.');
  },
  _listener: function tcm_listener(ev){
    var {gUbiquity} = Utils.currentChromeWindow;
    if(ev.keyCode !== 13 || ev.target !== gUbiquity.textBox) return;
    gUbiquity.cmdManager.execute(gUbiquity.__makeContext());
    ev.stopPropagation();
  },
});