From 76df95c9fb8306f5076ccb8e703054f287e78cd8 Mon Sep 17 00:00:00 2001
From: Sylvain Berfini <sylvain.berfini@belledonne-communications.com>
Date: Fri, 3 May 2019 17:34:43 +0200
Subject: [PATCH] Fixed preview orientation issue upon device rotation

---
 .../java/org/linphone/LinphoneService.java    |  5 ++
 .../utils/DeviceOrientationEventListener.java | 59 +++++++++++++++++++
 2 files changed, 64 insertions(+)
 create mode 100644 app/src/main/java/org/linphone/utils/DeviceOrientationEventListener.java

diff --git a/app/src/main/java/org/linphone/LinphoneService.java b/app/src/main/java/org/linphone/LinphoneService.java
index 0bc1e9464..ff36f76f3 100644
--- a/app/src/main/java/org/linphone/LinphoneService.java
+++ b/app/src/main/java/org/linphone/LinphoneService.java
@@ -48,6 +48,7 @@ import org.linphone.notifications.NotificationsManager;
 import org.linphone.receivers.BluetoothManager;
 import org.linphone.settings.LinphonePreferences;
 import org.linphone.utils.ActivityMonitor;
+import org.linphone.utils.DeviceOrientationEventListener;
 import org.linphone.utils.LinphoneUtils;
 import org.linphone.views.LinphoneGL2JNIViewOverlay;
 import org.linphone.views.LinphoneOverlay;
@@ -103,6 +104,7 @@ public final class LinphoneService extends Service {
     private LinphoneManager mLinphoneManager;
     private ContactsManager mContactsManager;
     private BluetoothManager mBluetoothManager;
+    private DeviceOrientationEventListener mOrientationHelper;
 
     private Class<? extends Activity> mIncomingReceivedActivity = CallIncomingActivity.class;
 
@@ -138,6 +140,7 @@ public final class LinphoneService extends Service {
         }
 
         mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
+        mOrientationHelper = new DeviceOrientationEventListener(this);
 
         mListener =
                 new CoreListenerStub() {
@@ -213,6 +216,7 @@ public final class LinphoneService extends Service {
         mBluetoothManager = new BluetoothManager();
 
         Compatibility.createChatShortcuts(this);
+        mOrientationHelper.enable();
 
         return START_STICKY;
     }
@@ -246,6 +250,7 @@ public final class LinphoneService extends Service {
             mActivityCallbacks = null;
         }
         destroyOverlay();
+        mOrientationHelper.disable();
 
         Core core = LinphoneManager.getCore();
         if (core != null) {
diff --git a/app/src/main/java/org/linphone/utils/DeviceOrientationEventListener.java b/app/src/main/java/org/linphone/utils/DeviceOrientationEventListener.java
new file mode 100644
index 000000000..a8f492f08
--- /dev/null
+++ b/app/src/main/java/org/linphone/utils/DeviceOrientationEventListener.java
@@ -0,0 +1,59 @@
+package org.linphone.utils;
+
+/*
+DeviceOrientationEventListener.java
+Copyright (C) 2019 Belledonne Communications, Grenoble, France
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+*/
+
+import android.content.Context;
+import android.view.OrientationEventListener;
+import org.linphone.LinphoneManager;
+import org.linphone.core.Core;
+import org.linphone.core.tools.Log;
+
+public class DeviceOrientationEventListener extends OrientationEventListener {
+    private int mAlwaysChangingPhoneAngle;
+
+    public DeviceOrientationEventListener(Context context) {
+        super(context);
+        mAlwaysChangingPhoneAngle = -1;
+    }
+
+    @Override
+    public void onOrientationChanged(final int orientation) {
+        if (orientation == OrientationEventListener.ORIENTATION_UNKNOWN) {
+            return;
+        }
+
+        int degrees = 270;
+        if (orientation < 45 || orientation > 315) degrees = 0;
+        else if (orientation < 135) degrees = 90;
+        else if (orientation < 225) degrees = 180;
+
+        if (mAlwaysChangingPhoneAngle == degrees) {
+            return;
+        }
+        mAlwaysChangingPhoneAngle = degrees;
+        Log.i("[Orientation Helper] Device orientation changed to " + degrees);
+
+        int rotation = (360 - degrees) % 360;
+        Core core = LinphoneManager.getCore();
+        if (core != null) {
+            core.setDeviceRotation(rotation);
+        }
+    }
+}