From 6dce687c53c7344ae3b0c82fb31b76960794fea7 Mon Sep 17 00:00:00 2001
From: Martin Hellwig <martin.hellwig@bosch-softtec.com>
Date: Thu, 25 Jan 2018 17:04:53 +0100
Subject: Implement new bearingTrackingMode GPS_NORTH_FACING

---
 .../mapbox/mapboxsdk/constants/MyBearingTracking.java    |  7 ++++++-
 .../mapbox/mapboxsdk/maps/widgets/MyLocationView.java    | 16 ++++++++++++----
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/constants/MyBearingTracking.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/constants/MyBearingTracking.java
index ceac862f39..c042b00577 100644
--- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/constants/MyBearingTracking.java
+++ b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/constants/MyBearingTracking.java
@@ -22,7 +22,7 @@ import java.lang.annotation.RetentionPolicy;
  */
 public class MyBearingTracking {
 
-  @IntDef( {NONE, COMPASS, GPS})
+  @IntDef( {NONE, COMPASS, GPS, GPS_NORTH_FACING})
   @Retention(RetentionPolicy.SOURCE)
   public @interface Mode {
   }
@@ -42,4 +42,9 @@ public class MyBearingTracking {
    */
   public static final int GPS = 0x00000008;
 
+  /**
+   * Tracking the bearing of the user based on GPS data, but camera always faces north direction
+   */
+  public static final int GPS_NORTH_FACING = 0x0000000B;
+
 }
diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/widgets/MyLocationView.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/widgets/MyLocationView.java
index 4f27e0ada8..0b725642d8 100644
--- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/widgets/MyLocationView.java
+++ b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/widgets/MyLocationView.java
@@ -356,7 +356,7 @@ public class MyLocationView extends View {
         foregroundDrawable.draw(canvas);
       }
     } else if (foregroundBearingDrawable != null && foregroundBounds != null) {
-      if (myBearingTrackingMode == MyBearingTracking.GPS || compassListener.isSensorAvailable()) {
+      if (myBearingTrackingMode == MyBearingTracking.GPS || myBearingTrackingMode == MyBearingTracking.GPS_NORTH_FACING || compassListener.isSensorAvailable()) {
         foregroundBearingDrawable.draw(canvas);
       } else {
         // We are tracking MyBearingTracking.COMPASS, but sensor is not available.
@@ -383,7 +383,7 @@ public class MyLocationView extends View {
   public void setBearing(double bearing) {
     this.bearing = bearing;
     if (myLocationTrackingMode == MyLocationTracking.TRACKING_NONE) {
-      if (myBearingTrackingMode == MyBearingTracking.GPS) {
+      if (myBearingTrackingMode == MyBearingTracking.GPS || myBearingTrackingMode == MyBearingTracking.GPS_NORTH_FACING) {
         if (location != null) {
           setCompass(location.getBearing() - bearing);
         }
@@ -580,7 +580,7 @@ public class MyLocationView extends View {
     this.location = location;
     myLocationBehavior.updateLatLng(location);
 
-    if (mapboxMap != null && myBearingTrackingMode == MyBearingTracking.GPS
+    if (mapboxMap != null && (myBearingTrackingMode == MyBearingTracking.GPS || myBearingTrackingMode == MyBearingTracking.GPS_NORTH_FACING) 
       && myLocationTrackingMode == MyLocationTracking.TRACKING_NONE) {
       setBearing(mapboxMap.getCameraPosition().bearing);
     }
@@ -616,7 +616,7 @@ public class MyLocationView extends View {
       compassListener.onResume();
     } else {
       compassListener.onPause();
-      if (myLocationTrackingMode == MyLocationTracking.TRACKING_FOLLOW) {
+      if (myLocationTrackingMode == MyLocationTracking.TRACKING_FOLLOW && myBearingTrackingMode == MyBearingTracking.GPS) {
         // always face north
         setCompass(0);
       } else {
@@ -1017,6 +1017,14 @@ public class MyLocationView extends View {
         setCompass(0, COMPASS_UPDATE_RATE_MS);
       }
 
+      if (myBearingTrackingMode == MyBearingTracking.GPS_NORTH_FACING) {
+        builder.bearing(0);
+        
+        if (location.hasBearing()) {
+          setCompass(location.getBearing(), COMPASS_UPDATE_RATE_MS);
+        }
+      }
+
       // accuracy
       updateAccuracy(location);
 
-- 
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