[gnome-maps] MapView: Add userLocationVisible() method

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 9c66c5140807ad710ed395bd0de1e3fd4eb00697
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Wed Apr 17 17:04:53 2013 +0300

    MapView: Add userLocationVisible() method
    
    A method to check if user location is currently visible on the map view.

 src/mapView.js | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/src/mapView.js b/src/mapView.js
index c854dcf..da13698 100644
--- a/src/mapView.js
+++ b/src/mapView.js
@@ -142,6 +142,12 @@ const MapView = new Lang.Class({
         this._userLocation.goTo(animate);
     },
 
+    userLocationVisible: function() {
+        let box = this.view.get_bounding_box();
+
+        return box.covers(this._userLocation.latitude, this._userLocation.longitude);
+    },
+
     _showUserLocation: function() {
         let lastLocation = Application.settings.get_value('last-location');
         if (lastLocation.n_children() >= 3) {