From e5053ac5c991385e2782ff844b585ddc02e50f38 Mon Sep 17 00:00:00 2001
From: Oliver Jowett <oliver@mutability.co.uk>
Date: Mon, 29 Jun 2015 15:51:42 +0100
Subject: [PATCH] Only set/reset position_from_mlat when we actually see
 position data.

Otherwise, if the position data times out on the dump1090 side, we'd
keep the last seen position on the webpage side but lose the mlat
status.
---
 public_html/planeObject.js | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/public_html/planeObject.js b/public_html/planeObject.js
index df5b296..797c5af 100644
--- a/public_html/planeObject.js
+++ b/public_html/planeObject.js
@@ -13,6 +13,7 @@ function PlaneObject(icao) {
         this.speed     = null;
         this.track     = null;
         this.position  = null;
+        this.position_from_mlat = false
         this.sitedist  = null;
 
 	// Data packet numbers
@@ -290,6 +291,16 @@ PlaneObject.prototype.updateData = function(receiver_timestamp, data) {
                 if (SitePosition !== null) {
                         this.sitedist = google.maps.geometry.spherical.computeDistanceBetween (SitePosition, this.position);
                 }
+
+                this.position_from_mlat = false;
+                if (typeof data.mlat !== "undefined") {
+                        for (var i = 0; i < data.mlat.length; ++i) {
+                                if (data.mlat[i] === "lat" || data.mlat[i] == "lon") {
+                                        this.position_from_mlat = true;
+                                        break;
+                                }
+                        }
+                }
         }
         if (typeof data.flight !== "undefined")
 		this.flight	= data.flight;
@@ -297,16 +308,6 @@ PlaneObject.prototype.updateData = function(receiver_timestamp, data) {
 		this.squawk	= data.squawk;
         if (typeof data.category !== "undefined")
                 this.category	= data.category;
-
-        this.position_from_mlat = false
-        if (typeof data.mlat !== "undefined") {
-                for (var i = 0; i < data.mlat.length; ++i) {
-                        if (data.mlat[i] === "lat" || data.mlat[i] == "lon") {
-                                this.position_from_mlat = true;
-                                break;
-                        }
-                }
-        }
 };
 
 PlaneObject.prototype.updateTick = function(receiver_timestamp, last_timestamp) {