refactor: Add Flutter lints

analysis_options.yaml

@@ -22,6 +22,7 @@ analyzer:
 
 dart_code_linter:
   rules:
+    # Dart specific:
     - avoid-dynamic
     - avoid-redundant-async
     - avoid-unnecessary-type-assertions
@@ -47,4 +48,13 @@ dart_code_linter:
     #       message: 'Do not import Flutter Material Design library, we should not depend on it!'
     # - no-magic-number:
     #     allowed: [-1, 0, 1,2,4,6,8,12,16,32,40,56,64]
-    #     allow-only-once: true
+    #     allow-only-once: true
+    # Flutter specific:
+    - prefer-media-query-direct-access
+    - avoid-wrapping-in-padding
+    - prefer-correct-edge-insets-constructor
+    # TODO:
+    # - avoid-returning-widgets
+    # - prefer-single-widget-per-file:
+    #    ignore-private-widgets: true
+    # - prefer-extracting-callbacks

lib/pages/chat_list/chat_list_body.dart

@@ -132,10 +132,7 @@ class ChatListViewBody extends StatelessWidget {
                     SizedBox(
                       height: 64,
                       child: ListView(
-                        padding: const EdgeInsets.symmetric(
+                        padding: const EdgeInsets.all(12.0),
-                          horizontal: 12.0,
-                          vertical: 12.0,
-                        ),
                         shrinkWrap: true,
                         scrollDirection: Axis.horizontal,
                         children:

lib/pages/chat_members/chat_members_view.dart

@@ -124,10 +124,7 @@ class ChatMembersView extends StatelessWidget {
                           SizedBox(
                             height: 64,
                             child: ListView.builder(
-                              padding: const EdgeInsets.symmetric(
+                              padding: const EdgeInsets.all(12.0),
-                                horizontal: 12.0,
-                                vertical: 12.0,
-                              ),
                               scrollDirection: Axis.horizontal,
                               itemCount: availableFilters.length,
                               itemBuilder: (context, i) => Padding(

lib/pages/dialer/dialer.dart

@@ -552,7 +552,7 @@ class MyCallingPage extends State<Calling> {
     if (secondaryStreamViews.isNotEmpty) {
       stackWidgets.add(
         Container(
-          padding: const EdgeInsets.fromLTRB(0, 20, 0, 120),
+          padding: const EdgeInsets.only(top: 20, bottom: 120),
           alignment: Alignment.bottomRight,
           child: Container(
             width: _localVideoWidth,

lib/pages/key_verification/key_verification_dialog.dart

@@ -120,7 +120,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
         final textEditingController = TextEditingController();
         String input;
         body = Container(
-          margin: const EdgeInsets.only(left: 8.0, right: 8.0),
+          margin: const EdgeInsets.symmetric(horizontal: 8.0),
           child: Column(
             mainAxisSize: .min,
             children: <Widget>[

lib/widgets/layouts/login_scaffold.dart

@@ -52,7 +52,7 @@ class LoginScaffold extends StatelessWidget {
           ),
           child: Stack(
             children: [
-              if (!MediaQuery.of(context).disableAnimations)
+              if (!MediaQuery.disableAnimationsOf(context))
                 ParticleNetwork(
                   maxSpeed: 0.25,
                   particleColor: theme.colorScheme.primary,