gipy: small fixes

apps/gipy/ChangeLog

@@ -103,3 +103,5 @@
 	* Jit is back for display functions (10% speed increase)
 	* Store, parse and display elevation data
 	* Removed 'lost' indicator (we now change position to purple when lost)
+	* Powersaving fix : don't powersave when lost
+	* Bugfix for negative remaining distance when going backwards

apps/gipy/TODO

@@ -41,8 +41,6 @@ JIT: array declaration in jit is buggy
 
 **************************
 
-+ there is still a bug with negative remaining distances (when lost and nearest point is endpoint ?)
-+ when lost we still get powersaving
 + try disabling gps for more powersaving
 
 + when you walk the direction still has a tendency to shift

apps/gipy/app.js

@@ -847,7 +847,6 @@ class Status {
       // now check if we strayed away from path or back to it
       let lost = this.is_lost(next_segment);
       if (this.on_path == lost) {
-        this.activate();
         // if status changes
         if (lost) {
           Bangle.buzz(); // we lost path
@@ -857,6 +856,9 @@ class Status {
         }
         this.on_path = !lost;
       }
+      if (!this.on_path) {
+        this.activate();
+      }
 
       this.current_segment = next_segment;
 
@@ -959,14 +961,12 @@ class Status {
     ]);
   }
   remaining_distance() {
-    let remaining_in_correct_orientation =
-      this.remaining_distances[this.current_segment + 1] +
-      this.position.distance(this.path.point(this.current_segment + 1));
-
     if (go_backwards) {
-      return this.remaining_distances[0] - remaining_in_correct_orientation;
+      return this.remaining_distances[0] - this.remaining_distances[this.current_segment] +
+      this.position.distance(this.path.point(this.current_segment));
     } else {
-      return remaining_in_correct_orientation;
+      return this.remaining_distances[this.current_segment + 1] +
+      this.position.distance(this.path.point(this.current_segment + 1));
     }
   }
   // check if we are lost (too far from segment we think we are on)