[gnome-shell] panelMenu: Show/hide the indicators box based on indicator visibility

[Jasper St. Pierre <jstpierre src gnome org>]

commit 4ba6791043c36b17afa9007d3784d0ad1492eee3
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Mon Jul 15 19:46:25 2013 -0400

    panelMenu: Show/hide the indicators box based on indicator visibility
    
    This ensures that there's no empty space in the indicators box, and we don't
    have to manage it manually.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=705845

 js/ui/panelMenu.js |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/panelMenu.js b/js/ui/panelMenu.js
index f6c48a4..8bad21d 100644
--- a/js/ui/panelMenu.js
+++ b/js/ui/panelMenu.js
@@ -241,13 +241,22 @@ const SystemIndicator = new Lang.Class({
     _init: function() {
         this.indicators = new St.BoxLayout({ style_class: 'panel-status-indicators-box',
                                              reactive: true });
+        this.indicators.hide();
         this.menu = new PopupMenu.PopupMenuSection();
     },
 
+    _syncIndicatorsVisible: function() {
+        this.indicators.visible = this.indicators.get_children().some(function(actor) {
+            return actor.visible;
+        });
+    },
+
     addIndicator: function(gicon) {
         let icon = new St.Icon({ gicon: gicon,
                                  style_class: 'system-status-icon' });
         this.indicators.add_actor(icon);
+        icon.connect('notify::visible', Lang.bind(this, this._syncIndicatorsVisible));
+        this._syncIndicatorsVisible();
         return icon;
     }
 });