[gnome-weather] app/world.js: Check if model is already populated at init

[Giovanni Campagna <gcampagna src gnome org>]

commit 27f7a1078499a8db953286dc667a09f97e01e7ce
Author: Jonas Danielsson <jonas threetimestwo org>
Date:   Sun Mar 1 13:53:45 2015 +0100

    app/world.js: Check if model is already populated at init
    
    If this is not the first window, the model might already been
    loaded. Make sure we add all locations currently in the model.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=740414

 src/app/world.js |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)
---
diff --git a/src/app/world.js b/src/app/world.js
index 99d0fab..5d92895 100644
--- a/src/app/world.js
+++ b/src/app/world.js
@@ -119,7 +119,13 @@ const WorldContentView = new Lang.Class({
         this.model.connect('location-added', Lang.bind(this, this._onLocationAdded));
         this.model.connect('location-removed', Lang.bind(this, this._onLocationRemoved));
 
-        this.model.load();
+        if (this.model.length > 0) {
+            this.model.getAll().forEach(Lang.bind(this, function(info) {
+                this._onLocationAdded(this.model, info, info._isCurrentLocation);
+            }));
+        } else {
+            this.model.load();
+        }
     },
 
     _filterListbox: function(row, model) {
@@ -184,7 +190,9 @@ const WorldContentView = new Lang.Class({
 
         if (isCurrentLocation) {
             if (model.addedCurrentLocation) {
-                this._listbox.get_row_at_index(0).destroy();
+                let row0 = this._listbox.get_row_at_index(0);
+                if (row0)
+                    row0.destroy();
             }
 
             this._listbox.insert(row, 0);