[polari] roomList: Sort accounts with no rooms last

[Florian Müllner <fmuellner src gnome org>]

commit 8a28956be273dbd7178919826f2428308a4ba824
Author: Florian Müllner <fmuellner gnome org>
Date:   Mon Jan 25 13:12:38 2016 +0100

    roomList: Sort accounts with no rooms last
    
    We now include inactive accounts in the list so the user can
    manage them, but they are less interesting than accounts with
    open conversations - make the sort order reflect that.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=709984

 src/roomList.js |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/src/roomList.js b/src/roomList.js
index 142828a..a05c8ee 100644
--- a/src/roomList.js
+++ b/src/roomList.js
@@ -468,6 +468,11 @@ const RoomList = new Lang.Class({
         this._placeholders[account] = placeholder;
         this.widget.add(placeholder);
 
+        placeholder.connect('notify::visible', Lang.bind(this,
+            function() {
+                this.widget.invalidate_sort();
+            }));
+
         this._updatePlaceholderVisibility(account);
     },
 
@@ -560,6 +565,12 @@ const RoomList = new Lang.Class({
         let account1 = row1.account;
         let account2 = row2.account;
 
+        let hasRooms1 = !this._placeholders[account1].visible;
+        let hasRooms2 = !this._placeholders[account2].visible;
+
+        if (hasRooms1 != hasRooms2)
+            return hasRooms1 ? -1 : 1;
+
         if (account1 != account2)
             return account1.display_name.localeCompare(account2.display_name);