Return to call button safe area insets

Signed-off-by: ismailgulek <gulekismail@gmail.com>

Riot/Categories/UIDevice.swift

@@ -0,0 +1,36 @@
+/*
+ Copyright 2019 New Vector Ltd
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+import Foundation
+import UIKit
+
+@objc extension UIDevice {
+
+    /// Returns 'true' if the current device has a notch
+    var hasNotch: Bool {
+        if #available(iOS 11.0, *) {
+            // Case 1: Portrait && top safe area inset >= 44
+            let case1 = !UIDevice.current.orientation.isLandscape && (UIApplication.shared.keyWindow?.safeAreaInsets.top ?? 0) >= 44
+            // Case 2: Lanscape && left/right safe area inset > 0
+            let case2 = UIDevice.current.orientation.isLandscape && ((UIApplication.shared.keyWindow?.safeAreaInsets.left ?? 0) > 0 || (UIApplication.shared.keyWindow?.safeAreaInsets.right ?? 0) > 0)
+
+            return case1 || case2
+        } else {
+            // Fallback on earlier versions
+            return false
+        }
+    }
+}