Update CupertinoContextMenu to iOS 16 visuals (#110616)

* Update CupertinoContextMenu to iOS 16 visuals

* Revert some formatting

* Remove space

* Remove formatting changes, add more comments

* Added shadow effect

* Update context menu tests

* Remove white spaces

* Remove unused variable

* Refactor type checking logic

* Set default previewBuilder and update tests

* Check for border radius

* Remove trailing spaces

* Add builder to constructor

* Update previewBuilder

Rebase to master

* Update builder and tests

* Remove trailing spaces

* Update examples

* Refactor builder

* Update builder to use one animation

* Update scale

* Change deprecation message, remove white spaces

* Change deprecation message

* Change deprecation message

* Change deprecation message

* Update documentation

* Update documentation

* Update documentation and examples

* Update documentation and examples

* Remove white spaces

* Remove white spaces

* Remove const

* Address linting errors

* Seperate builder into own constructor

* Remove trailing characters

* Formatting changes

* Remove white spaces

* Change ignore comment

* Add TODO

* Remove whitespace

examples/api/lib/cupertino/context_menu/cupertino_context_menu.0.dart

@@ -49,7 +49,7 @@ class ContextMenuExample extends StatelessWidget {
                   Navigator.pop(context);
                 },
                 trailingIcon: CupertinoIcons.share,
-                child: const Text('Share  '),
+                child: const Text('Share'),
               ),
               CupertinoContextMenuAction(
                 onPressed: () {
@@ -68,10 +68,7 @@ class ContextMenuExample extends StatelessWidget {
               ),
             ],
             child: Container(
-              decoration: BoxDecoration(
               color: CupertinoColors.systemYellow,
-                borderRadius: BorderRadius.circular(20.0),
-              ),
               child: const FlutterLogo(size: 500.0),
             ),
           ),

examples/api/lib/cupertino/context_menu/cupertino_context_menu.1.dart

+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/// Flutter code sample for [CupertinoContextMenu].
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+final DecorationTween _tween = DecorationTween(
+  begin: BoxDecoration(
+    color: CupertinoColors.systemYellow,
+    boxShadow: const <BoxShadow>[],
+    borderRadius: BorderRadius.circular(20.0),
+  ),
+  end: BoxDecoration(
+    color: CupertinoColors.systemYellow,
+    boxShadow: CupertinoContextMenu.kEndBoxShadow,
+    borderRadius: BorderRadius.circular(20.0),
+  ),
+);
+
+void main() => runApp(const ContextMenuApp());
+
+class ContextMenuApp extends StatelessWidget {
+  const ContextMenuApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return const CupertinoApp(
+      theme: CupertinoThemeData(brightness: Brightness.light),
+      home: ContextMenuExample(),
+    );
+  }
+}
+
+class ContextMenuExample extends StatelessWidget {
+  const ContextMenuExample({super.key});
+
+  // Or just do this inline in the builder below?
+  static Animation<Decoration> _boxDecorationAnimation(Animation<double> animation) {
+    return _tween.animate(
+      CurvedAnimation(
+        parent: animation,
+        curve: Interval(
+          0.0,
+          CupertinoContextMenu.animationOpensAt,
+        ),
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return CupertinoPageScaffold(
+      navigationBar: const CupertinoNavigationBar(
+        middle: Text('CupertinoContextMenu Sample'),
+      ),
+      child: Center(
+        child: SizedBox(
+          width: 100,
+          height: 100,
+          child: CupertinoContextMenu.builder(
+            actions: <Widget>[
+              CupertinoContextMenuAction(
+                onPressed: () {
+                  Navigator.pop(context);
+                },
+                isDefaultAction: true,
+                trailingIcon: CupertinoIcons.doc_on_clipboard_fill,
+                child: const Text('Copy'),
+              ),
+              CupertinoContextMenuAction(
+                onPressed: () {
+                  Navigator.pop(context);
+                },
+                trailingIcon: CupertinoIcons.share,
+                child: const Text('Share'),
+              ),
+              CupertinoContextMenuAction(
+                onPressed: () {
+                  Navigator.pop(context);
+                },
+                trailingIcon: CupertinoIcons.heart,
+                child: const Text('Favorite'),
+              ),
+              CupertinoContextMenuAction(
+                onPressed: () {
+                  Navigator.pop(context);
+                },
+                isDestructiveAction: true,
+                trailingIcon: CupertinoIcons.delete,
+                child: const Text('Delete'),
+              ),
+            ],
+            builder:(BuildContext context, Animation<double> animation) {
+              final Animation<Decoration> boxDecorationAnimation =
+                _boxDecorationAnimation(animation);
+
+              return Container(
+                decoration:
+                  animation.value < CupertinoContextMenu.animationOpensAt
+                  ? boxDecorationAnimation.value
+                  : null,
+                child: Container(
+                  decoration: BoxDecoration(
+                    color: CupertinoColors.systemYellow,
+                    borderRadius: BorderRadius.circular(20.0),
+                  ),
+                  child: const FlutterLogo(size: 500.0),
+                ),
+              );
+            },
+          ),
+        ),
+      ),
+    );
+  }
+}

examples/api/test/cupertino/context_menu/cupertino_context_menu.1_test.dart

+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_api_samples/cupertino/context_menu/cupertino_context_menu.1.dart' as example;
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  testWidgets('Can open cupertino context menu', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const example.ContextMenuApp(),
+    );
+
+    final Offset logo = tester.getCenter(find.byType(FlutterLogo));
+    expect(find.text('Favorite'), findsNothing);
+
+    await tester.startGesture(logo);
+    await tester.pumpAndSettle();
+    expect(find.text('Favorite'), findsOneWidget);
+
+    await tester.tap(find.text('Favorite'));
+    await tester.pumpAndSettle();
+    expect(find.text('Favorite'), findsNothing);
+  });
+}