added cargo files

PinePods-0.8.2/mobile/lib/ui/widgets/platform_back_button.dart

@@ -0,0 +1,58 @@
+// Copyright 2020 Ben Hills and the project contributors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:io';
+
+import 'package:pinepods_mobile/l10n/L.dart';
+import 'package:flutter/material.dart';
+
+/// Simple widget for rendering either the standard Android close or iOS Back button.
+class PlatformBackButton extends StatelessWidget {
+  final Color decorationColour;
+  final Color iconColour;
+  final VoidCallback onPressed;
+
+  const PlatformBackButton({
+    super.key,
+    required this.iconColour,
+    required this.decorationColour,
+    required this.onPressed,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Material(
+      color: Colors.transparent,
+      child: Semantics(
+        button: true,
+        child: Center(
+          child: SizedBox(
+            height: 48.0,
+            width: 48.0,
+            child: InkWell(
+              onTap: onPressed,
+              child: Container(
+                margin: const EdgeInsets.all(6.0),
+                height: 48.0,
+                width: 48.0,
+                decoration: ShapeDecoration(
+                  color: decorationColour,
+                  shape: const CircleBorder(),
+                ),
+                child: Padding(
+                  padding: EdgeInsets.only(left: Platform.isIOS ? 8.0 : 0.0),
+                  child: Icon(
+                    Platform.isIOS ? Icons.arrow_back_ios : Icons.close,
+                    size: Platform.isIOS ? 20.0 : 26.0,
+                    semanticLabel: L.of(context)?.go_back_button_label,
+                  ),
+                ),
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}