const GObject = imports.gi.GObject;
const Shell   = imports.gi.Shell;
const Main    = imports.ui.main;
const Unite   = imports.misc.extensionUtils.getCurrentExtension();
const Base    = Unite.imports.module.BaseModule;

var ActivitiesButton = new GObject.Class({
  Name: 'UniteActivitiesButton',
  Extends: Base,

  _enableKey: 'hide-activities-button',
  _disableValue: 'never',

  _onInitialize() {
    this._container = Main.panel.statusArea.activities.container;
    this.appSystem  = Shell.AppSystem.get_default();
    this.winTracker = Shell.WindowTracker.get_default();
  },

  _onActivate() {
    this._signals.connect(this.appSystem, 'app-state-changed', 'toggleButton');
    this._signals.connect(this.winTracker, 'notify::focus-app', 'toggleButton');

    this._signals.connect(Main.overview, 'showing', 'toggleButton');
    this._signals.connect(Main.overview, 'hiding', 'toggleButton');

    this._toggleButton();
  },

  _onReset() {
    this._toggleButton();
  },

  _onDeactivate() {
    this._container.show();
  },

  _toggleButton() {
    let appMenu  = Main.panel.statusArea.appMenu._targetApp != null;
    let overview = Main.overview.visibleTarget;
    let hidden   = this._setting == 'always' || (appMenu && !overview);

    if (!hidden && this._settings.get('show-desktop-name'))
      hidden = !appMenu && !overview;

    this._container.visible = !hidden;
  }
});