lint changes image

packages/stream_chat_flutter/lib/src/image_header.dart

@@ -1,11 +1,26 @@
 import 'package:flutter/material.dart';
+import 'package:stream_chat_flutter/src/attachment_actions_modal.dart';
 import 'package:stream_chat_flutter/src/stream_chat_theme.dart';
 import 'package:stream_chat_flutter/src/stream_svg_icon.dart';
 import 'package:stream_chat_flutter_core/stream_chat_flutter_core.dart';
 
-import 'attachment_actions_modal.dart';
-
+/// Header/AppBar widget for media display screen
 class ImageHeader extends StatelessWidget implements PreferredSizeWidget {
+  /// Creates a channel header
+  const ImageHeader({
+    Key? key,
+    required this.message,
+    this.currentIndex = 0,
+    this.showBackButton = true,
+    this.onBackPressed,
+    this.onShowMessage,
+    this.onTitleTap,
+    this.onImageTap,
+    this.userName = '',
+    this.sentAt = '',
+  })  : preferredSize = const Size.fromHeight(kToolbarHeight),
+        super(key: key);
+
   /// True if this header shows the leading back button
   final bool showBackButton;
 
@@ -22,83 +37,72 @@ class ImageHeader extends StatelessWidget implements PreferredSizeWidget {
   /// Callback to call when the image is tapped.
   final VoidCallback? onImageTap;
 
+  /// Message which attachments are attached to
   final Message message;
 
+  /// Username of sender
   final String userName;
+
+  /// Text which connotes the time the message was sent
   final String sentAt;
 
+  /// Stores the current index of media shown
   final int currentIndex;
 
-  /// Creates a channel header
-  ImageHeader({
-    Key? key,
-    required this.message,
-    this.currentIndex = 0,
-    this.showBackButton = true,
-    this.onBackPressed,
-    this.onShowMessage,
-    this.onTitleTap,
-    this.onImageTap,
-    this.userName = '',
-    this.sentAt = '',
-  })  : preferredSize = Size.fromHeight(kToolbarHeight),
-        super(key: key);
-
   @override
-  Widget build(BuildContext context) {
-    return AppBar(
-      brightness: Theme.of(context).brightness,
-      elevation: 1,
-      leading: showBackButton
-          ? IconButton(
-              icon: StreamSvgIcon.close(
-                color: StreamChatTheme.of(context).colorTheme.black,
-                size: 24,
-              ),
-              onPressed: onBackPressed,
-            )
-          : SizedBox(),
-      backgroundColor:
-          StreamChatTheme.of(context).channelTheme.channelHeaderTheme.color,
-      actions: <Widget>[
-        if (message.type != 'ephemeral')
-          IconButton(
-            icon: StreamSvgIcon.iconMenuPoint(
-              color: StreamChatTheme.of(context).colorTheme.black,
-            ),
-            onPressed: () {
-              _showMessageActionModalBottomSheet(context);
-            },
-          ),
-      ],
-      centerTitle: true,
-      title: message.type != 'ephemeral'
-          ? InkWell(
-              onTap: onTitleTap,
-              child: Container(
-                height: preferredSize.height,
-                width: preferredSize.width,
-                child: Column(
-                  mainAxisAlignment: MainAxisAlignment.center,
-                  mainAxisSize: MainAxisSize.min,
-                  children: <Widget>[
-                    Text(
-                      userName,
-                      style: StreamChatTheme.of(context).textTheme.headlineBold,
-                    ),
-                    Text(
-                      sentAt,
-                      style: StreamChatTheme.of(context)
-                          .channelPreviewTheme
-                          .subtitle,
-                    ),
-                  ],
+  Widget build(BuildContext context) => AppBar(
+        brightness: Theme.of(context).brightness,
+        elevation: 1,
+        leading: showBackButton
+            ? IconButton(
+                icon: StreamSvgIcon.close(
+                  color: StreamChatTheme.of(context).colorTheme.black,
+                  size: 24,
                 ),
+                onPressed: onBackPressed,
+              )
+            : const SizedBox(),
+        backgroundColor:
+            StreamChatTheme.of(context).channelTheme.channelHeaderTheme.color,
+        actions: <Widget>[
+          if (message.type != 'ephemeral')
+            IconButton(
+              icon: StreamSvgIcon.iconMenuPoint(
+                color: StreamChatTheme.of(context).colorTheme.black,
               ),
-            )
-          : SizedBox(),
-    );
-  }
+              onPressed: () {
+                _showMessageActionModalBottomSheet(context);
+              },
+            ),
+        ],
+        centerTitle: true,
+        title: message.type != 'ephemeral'
+            ? InkWell(
+                onTap: onTitleTap,
+                child: SizedBox(
+                  height: preferredSize.height,
+                  width: preferredSize.width,
+                  child: Column(
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    mainAxisSize: MainAxisSize.min,
+                    children: <Widget>[
+                      Text(
+                        userName,
+                        style:
+                            StreamChatTheme.of(context).textTheme.headlineBold,
+                      ),
+                      Text(
+                        sentAt,
+                        style: StreamChatTheme.of(context)
+                            .channelPreviewTheme
+                            .subtitle,
+                      ),
+                    ],
+                  ),
+                ),
+              )
+            : const SizedBox(),
+      );
 
   @override
   final Size preferredSize;
@@ -109,16 +113,14 @@ class ImageHeader extends StatelessWidget implements PreferredSizeWidget {
     final result = await showDialog(
       context: context,
       barrierColor: StreamChatTheme.of(context).colorTheme.overlay,
-      builder: (context) {
-        return StreamChannel(
-          channel: channel,
-          child: AttachmentActionsModal(
-            message: message,
-            currentIndex: currentIndex,
-            onShowMessage: onShowMessage,
-          ),
-        );
-      },
+      builder: (context) => StreamChannel(
+        channel: channel,
+        child: AttachmentActionsModal(
+          message: message,
+          currentIndex: currentIndex,
+          onShowMessage: onShowMessage,
+        ),
+      ),
     );
 
     if (result != null) {