Enable lints library_private_types_in_public_api, sort_child_properties_last and use_key_in_widget_constructors (#5428)

Author: asashour

analysis_options.yaml

@@ -134,6 +134,7 @@ linter:
     - leading_newlines_in_multiline_strings
     - library_names
     - library_prefixes
+    - library_private_types_in_public_api
     # - lines_longer_than_80_chars # not required by flutter style
     - list_remove_unrelated_type
     # - literal_only_boolean_expressions # too many false positives: https://github.com/dart-lang/sdk/issues/34181
@@ -197,7 +198,7 @@ linter:
     - recursive_getters
     # - sized_box_for_whitespace # not yet tested
     - slash_for_doc_comments
-    # - sort_child_properties_last # not yet tested
+    - sort_child_properties_last
     - sort_constructors_first
     - sort_unnamed_constructors_first
     - test_types_in_equals
@@ -229,7 +230,7 @@ linter:
     - use_full_hex_values_for_flutter_colors
     # - use_function_type_syntax_for_parameters # not yet tested
     - use_is_even_rather_than_modulo
-    # - use_key_in_widget_constructors # not yet tested
+    - use_key_in_widget_constructors
     - use_late_for_private_fields_and_variables
     - use_raw_strings
     - use_rethrow_when_possible

packages/camera/camera/CHANGELOG.md

@@ -1,6 +1,8 @@
-## NEXT
+## 0.9.4+22
 
 * Removes unnecessary imports.
+* Fixes library_private_types_in_public_api, sort_child_properties_last and use_key_in_widget_constructors
+  lint warnings.
 
 ## 0.9.4+21
 

packages/camera/camera/README.md

@@ -89,18 +89,22 @@ Here is a small example flutter app displaying a full screen camera preview.
 import 'package:camera/camera.dart';
 import 'package:flutter/material.dart';
 
-late List<CameraDescription> cameras;
+late List<CameraDescription> _cameras;
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
 
-  cameras = await availableCameras();
-  runApp(CameraApp());
+  _cameras = await availableCameras();
+  runApp(const CameraApp());
 }
 
+/// CameraApp is the Main Application.
 class CameraApp extends StatefulWidget {
+  /// Default Constructor
+  const CameraApp({Key? key}) : super(key: key);
+
   @override
-  _CameraAppState createState() => _CameraAppState();
+  State<CameraApp> createState() => _CameraAppState();
 }
 
 class _CameraAppState extends State<CameraApp> {
@@ -109,7 +113,7 @@ class _CameraAppState extends State<CameraApp> {
   @override
   void initState() {
     super.initState();
-    controller = CameraController(cameras[0], ResolutionPreset.max);
+    controller = CameraController(_cameras[0], ResolutionPreset.max);
     controller.initialize().then((_) {
       if (!mounted) {
         return;

packages/camera/camera/example/lib/main.dart

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// ignore_for_file: public_member_api_docs
-
 import 'dart:async';
 import 'dart:io';
 
@@ -13,9 +11,13 @@ import 'package:flutter/material.dart';
 import 'package:flutter/scheduler.dart';
 import 'package:video_player/video_player.dart';
 
+/// Camera example home widget.
 class CameraExampleHome extends StatefulWidget {
+  /// Default Constructor
+  const CameraExampleHome({Key? key}) : super(key: key);
+
   @override
-  _CameraExampleHomeState createState() {
+  State<CameraExampleHome> createState() {
     return _CameraExampleHomeState();
   }
 }
@@ -34,7 +36,7 @@ IconData getCameraLensIcon(CameraLensDirection direction) {
   }
 }
 
-void logError(String code, String? message) {
+void _logError(String code, String? message) {
   if (message != null) {
     print('Error: $code\nError Message: $message');
   } else {
@@ -134,12 +136,6 @@ class _CameraExampleHomeState extends State<CameraExampleHome>
         children: <Widget>[
           Expanded(
             child: Container(
-              child: Padding(
-                padding: const EdgeInsets.all(1.0),
-                child: Center(
-                  child: _cameraPreviewWidget(),
-                ),
-              ),
               decoration: BoxDecoration(
                 color: Colors.black,
                 border: Border.all(
@@ -150,6 +146,12 @@ class _CameraExampleHomeState extends State<CameraExampleHome>
                   width: 3.0,
                 ),
               ),
+              child: Padding(
+                padding: const EdgeInsets.all(1.0),
+                child: Center(
+                  child: _cameraPreviewWidget(),
+                ),
+              ),
             ),
           ),
           _captureControlRowWidget(),
@@ -233,6 +235,8 @@ class _CameraExampleHomeState extends State<CameraExampleHome>
               Container()
             else
               SizedBox(
+                width: 64.0,
+                height: 64.0,
                 child: (localVideoController == null)
                     ? (
                         // The captured image on the web contains a network-accessible URL
@@ -243,6 +247,8 @@ class _CameraExampleHomeState extends State<CameraExampleHome>
                             ? Image.network(imageFile!.path)
                             : Image.file(File(imageFile!.path)))
                     : Container(
+                        decoration: BoxDecoration(
+                            border: Border.all(color: Colors.pink)),
                         child: Center(
                           child: AspectRatio(
                               aspectRatio:
@@ -251,11 +257,7 @@ class _CameraExampleHomeState extends State<CameraExampleHome>
                                       : 1.0,
                               child: VideoPlayer(localVideoController)),
                         ),
-                        decoration: BoxDecoration(
-                            border: Border.all(color: Colors.pink)),
                       ),
-                width: 64.0,
-                height: 64.0,
               ),
           ],
         ),
@@ -394,7 +396,6 @@ class _CameraExampleHomeState extends State<CameraExampleHome>
                 mainAxisSize: MainAxisSize.max,
                 children: <Widget>[
                   TextButton(
-                    child: const Text('AUTO'),
                     style: styleAuto,
                     onPressed: controller != null
                         ? () =>
@@ -406,21 +407,22 @@ class _CameraExampleHomeState extends State<CameraExampleHome>
                         showInSnackBar('Resetting exposure point');
                       }
                     },
+                    child: const Text('AUTO'),
                   ),
                   TextButton(
-                    child: const Text('LOCKED'),
                     style: styleLocked,
                     onPressed: controller != null
                         ? () =>
                             onSetExposureModeButtonPressed(ExposureMode.locked)
                         : null,
+                    child: const Text('LOCKED'),
                   ),
                   TextButton(
-                    child: const Text('RESET OFFSET'),
                     style: styleLocked,
                     onPressed: controller != null
                         ? () => controller!.setExposureOffset(0.0)
                         : null,
+                    child: const Text('RESET OFFSET'),
                   ),
                 ],
               ),
@@ -479,7 +481,6 @@ class _CameraExampleHomeState extends State<CameraExampleHome>
                 mainAxisSize: MainAxisSize.max,
                 children: <Widget>[
                   TextButton(
-                    child: const Text('AUTO'),
                     style: styleAuto,
                     onPressed: controller != null
                         ? () => onSetFocusModeButtonPressed(FocusMode.auto)
@@ -490,13 +491,14 @@ class _CameraExampleHomeState extends State<CameraExampleHome>
                       }
                       showInSnackBar('Resetting focus point');
                     },
+                    child: const Text('AUTO'),
                   ),
                   TextButton(
-                    child: const Text('LOCKED'),
                     style: styleLocked,
                     onPressed: controller != null
                         ? () => onSetFocusModeButtonPressed(FocusMode.locked)
                         : null,
+                    child: const Text('LOCKED'),
                   ),
                 ],
               ),
@@ -582,13 +584,13 @@ class _CameraExampleHomeState extends State<CameraExampleHome>
       onNewCameraSelected(description);
     };
 
-    if (cameras.isEmpty) {
+    if (_cameras.isEmpty) {
       _ambiguate(SchedulerBinding.instance)?.addPostFrameCallback((_) async {
         showInSnackBar('No camera found.');
       });
       return const Text('None');
     } else {
-      for (final CameraDescription cameraDescription in cameras) {
+      for (final CameraDescription cameraDescription in _cameras) {
         toggles.add(
           SizedBox(
             width: 90.0,
@@ -1014,31 +1016,35 @@ class _CameraExampleHomeState extends State<CameraExampleHome>
   }
 
   void _showCameraException(CameraException e) {
-    logError(e.code, e.description);
+    _logError(e.code, e.description);
     showInSnackBar('Error: ${e.code}\n${e.description}');
   }
 }
 
+/// CameraApp is the Main Application.
 class CameraApp extends StatelessWidget {
+  /// Default Constructor
+  const CameraApp({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
-    return MaterialApp(
+    return const MaterialApp(
       home: CameraExampleHome(),
     );
   }
 }
 
-List<CameraDescription> cameras = <CameraDescription>[];
+List<CameraDescription> _cameras = <CameraDescription>[];
 
 Future<void> main() async {
   // Fetch the available cameras before initializing the app.
   try {
     WidgetsFlutterBinding.ensureInitialized();
-    cameras = await availableCameras();
+    _cameras = await availableCameras();
   } on CameraException catch (e) {
-    logError(e.code, e.description);
+    _logError(e.code, e.description);
   }
-  runApp(CameraApp());
+  runApp(const CameraApp());
 }
 
 /// This allows a value of type T or T? to be treated as a value of type T?.

packages/camera/camera/example/lib/readme_full_example.dart

@@ -2,24 +2,26 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// ignore_for_file: public_member_api_docs
-
 // #docregion FullAppExample
 import 'package:camera/camera.dart';
 import 'package:flutter/material.dart';
 
-late List<CameraDescription> cameras;
+late List<CameraDescription> _cameras;
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
 
-  cameras = await availableCameras();
-  runApp(CameraApp());
+  _cameras = await availableCameras();
+  runApp(const CameraApp());
 }
 
+/// CameraApp is the Main Application.
 class CameraApp extends StatefulWidget {
+  /// Default Constructor
+  const CameraApp({Key? key}) : super(key: key);
+
   @override
-  _CameraAppState createState() => _CameraAppState();
+  State<CameraApp> createState() => _CameraAppState();
 }
 
 class _CameraAppState extends State<CameraApp> {
@@ -28,7 +30,7 @@ class _CameraAppState extends State<CameraApp> {
   @override
   void initState() {
     super.initState();
-    controller = CameraController(cameras[0], ResolutionPreset.max);
+    controller = CameraController(_cameras[0], ResolutionPreset.max);
     controller.initialize().then((_) {
       if (!mounted) {
         return;

packages/camera/camera/example/test/main_test.dart

@@ -9,7 +9,7 @@ import 'package:flutter_test/flutter_test.dart';
 void main() {
   testWidgets('Test snackbar', (WidgetTester tester) async {
     WidgetsFlutterBinding.ensureInitialized();
-    await tester.pumpWidget(CameraApp());
+    await tester.pumpWidget(const CameraApp());
     await tester.pumpAndSettle();
     expect(find.byType(SnackBar), findsOneWidget);
   });

packages/camera/camera/lib/src/camera_preview.dart

@@ -10,7 +10,8 @@ import 'package:flutter/services.dart';
 /// A widget showing a live camera preview.
 class CameraPreview extends StatelessWidget {
   /// Creates a preview widget for the given camera controller.
-  const CameraPreview(this.controller, {this.child});
+  const CameraPreview(this.controller, {Key? key, this.child})
+      : super(key: key);
 
   /// The controller for the camera that the preview is shown for.
   final CameraController controller;

packages/camera/camera/pubspec.yaml

@@ -4,7 +4,7 @@ description: A Flutter plugin for controlling the camera. Supports previewing
   Dart.
 repository: https://github.com/flutter/plugins/tree/main/packages/camera/camera
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+camera%22
-version: 0.9.4+21
+version: 0.9.4+22
 
 environment:
   sdk: ">=2.14.0 <3.0.0"

packages/camera/camera_web/CHANGELOG.md

@@ -1,3 +1,8 @@
+## 0.2.1+5
+
+* Fixes library_private_types_in_public_api, sort_child_properties_last and use_key_in_widget_constructors
+  lint warnings.
+
 ## 0.2.1+4
 
 * Migrates from `ui.hash*` to `Object.hash*`.

packages/camera/camera_web/example/lib/main.dart

@@ -4,10 +4,13 @@
 
 import 'package:flutter/material.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 /// App for testing
 class MyApp extends StatelessWidget {
+  /// Default Constructor
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return const Directionality(