projects/common-map/src/fm-map/components/aol/gps-location/gps-location.component.ts

@@ -59,12 +59,10 @@ export class GpsLocation  implements OnInit,OnChanges{
   ngOnChanges(changes: SimpleChanges) {
     if (changes.position && this.instance) {
       var p = changes.position.currentValue as Position;
-      if(p) {
       this.instance.setPosition(fromLonLat([p.coords.longitude, p.coords.latitude]));
       this.locationTolerance = p.coords.accuracy;
       this.recalcLocationTolerance();
     }
-    }
     if(changes.heading && this.instance) {
       this.rotate = "rotate(" +   Math.round(changes.heading.currentValue) + " 500 500)";
     }

projects/common-map/src/fm-map/services/geolocation.service.ts

@@ -1,5 +1,5 @@
 import { Injectable } from '@angular/core';
-import { Observer, Observable,BehaviorSubject } from 'rxjs';
+import { Observer, Observable } from 'rxjs';
 
 /**
  * GeolocationService class.
@@ -9,15 +9,23 @@ import { Observer, Observable,BehaviorSubject } from 'rxjs';
 @Injectable()
 export class GeolocationService {
 
-  private positionObserver$:BehaviorSubject<Position>  = new BehaviorSubject<Position>(null);
-
-  constructor() {
+  /**
+   * Tries HTML5 geolocation.
+   *
+   * Wraps the Geolocation API into an observable.
+   *
+   * @return An observable of Position
+   */
+  getCurrentPosition(): Observable<Position> {
+    return Observable.create((observer: Observer<Position>) => {
+      // Invokes getCurrentPosition method of Geolocation API.
       navigator.geolocation.watchPosition(
         (position: Position) => {
-        this.positionObserver$.next(position);
+          observer.next(position);
         },
         (error: PositionError) => {
           console.debug('Geolocation service: ' + error.message);
+          //observer.error(error);
         },
         {
           enableHighAccuracy: true,
@@ -25,10 +33,7 @@ export class GeolocationService {
           maximumAge: 0
         }
       );
+    });
   }
 
-
-  getCurrentPosition(): Observable<Position> {
-    return this.positionObserver$;
-  }
 }