refactor(ui): replace SizedBox.shrink(), Container() with Empty widget (#2149)

* refactor(ui): replace SizedBox.shrink(), Container() with Empty widget

* chore: replace offstage with empty

Author: xsahil03x

packages/stream_chat_flutter/lib/platform_widget_builder/src/desktop_widget.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/widgets.dart';
 import 'package:stream_chat_flutter/platform_widget_builder/src/desktop_widget_base.dart';
+import 'package:stream_chat_flutter/src/misc/empty_widget.dart';
 
 /// A widget that will only be built for the specified desktop Platforms.
 ///
@@ -26,13 +27,13 @@ class DesktopWidget extends DesktopWidgetBase<Widget, Widget, Widget> {
 
   @override
   Widget createMacosWidget(BuildContext context) =>
-      macOS?.call(context) ?? const SizedBox.shrink();
+      macOS?.call(context) ?? const Empty();
 
   @override
   Widget createWindowsWidget(BuildContext context) =>
-      windows?.call(context) ?? const SizedBox.shrink();
+      windows?.call(context) ?? const Empty();
 
   @override
   Widget createLinuxWidget(BuildContext context) =>
-      linux?.call(context) ?? const SizedBox.shrink();
+      linux?.call(context) ?? const Empty();
 }

packages/stream_chat_flutter/lib/platform_widget_builder/src/platform_widget.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/widgets.dart';
 import 'package:stream_chat_flutter/platform_widget_builder/src/platform_widget_base.dart';
+import 'package:stream_chat_flutter/src/misc/empty_widget.dart';
 
 /// A widget that will only be built for the specific Platforms:
 ///
@@ -26,13 +27,13 @@ class PlatformWidget extends PlatformWidgetBase<Widget, Widget, Widget> {
 
   @override
   Widget createDesktopWidget(BuildContext context) =>
-      desktop?.call(context) ?? const SizedBox.shrink();
+      desktop?.call(context) ?? const Empty();
 
   @override
   Widget createMobileWidget(BuildContext context) =>
-      mobile?.call(context) ?? const SizedBox.shrink();
+      mobile?.call(context) ?? const Empty();
 
   @override
   Widget createWebWidget(BuildContext context) =>
-      web?.call(context) ?? const SizedBox.shrink();
+      web?.call(context) ?? const Empty();
 }

packages/stream_chat_flutter/lib/src/attachment/attachment_upload_state_builder.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:stream_chat_flutter/src/misc/empty_widget.dart';
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 
 /// {@template streamAttachmentUploadStateBuilder}
@@ -37,7 +38,7 @@ class StreamAttachmentUploadStateBuilder extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     if (message.state.isCompleted) {
-      return const Offstage();
+      return const Empty();
     }
 
     final messageId = message.id;

packages/stream_chat_flutter/lib/src/attachment/builder/attachment_widget_builder.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:stream_chat_flutter/src/misc/empty_widget.dart';
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 
 part 'fallback_attachment_builder.dart';

packages/stream_chat_flutter/lib/src/attachment/builder/fallback_attachment_builder.dart

@@ -28,6 +28,6 @@ class FallbackAttachmentBuilder extends StreamAttachmentWidgetBuilder {
   ) {
     // Returns an empty widget because this builder will be used as a fallback
     // when no other builder can handle the attachments.
-    return const SizedBox.shrink();
+    return const Empty();
   }
 }

packages/stream_chat_flutter/lib/src/attachment/builder/voice_recording_attachment_builder/stream_voice_recording_player.dart

@@ -7,6 +7,7 @@ import 'package:flutter/material.dart';
 import 'package:just_audio/just_audio.dart';
 import 'package:rxdart/rxdart.dart';
 import 'package:stream_chat_flutter/src/attachment/builder/voice_recording_attachment_builder/stream_voice_recording_slider.dart';
+import 'package:stream_chat_flutter/src/misc/empty_widget.dart';
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 
 /// {@template StreamVoiceRecordingPlayer}
@@ -222,7 +223,7 @@ class _StreamVoiceRecordingPlayerState
         style: theme.fileSizeTextStyle,
       );
     } else {
-      return const SizedBox.shrink();
+      return const Empty();
     }
   }
 

packages/stream_chat_flutter/lib/src/attachment/voice_recording_attachment_playlist.dart

@@ -2,6 +2,7 @@ import 'package:collection/collection.dart';
 import 'package:flutter/material.dart';
 import 'package:stream_chat_flutter/src/attachment/voice_recording_attachment.dart';
 import 'package:stream_chat_flutter/src/audio/audio_playlist_controller.dart';
+import 'package:stream_chat_flutter/src/misc/empty_widget.dart';
 
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 
@@ -52,7 +53,7 @@ class StreamVoiceRecordingAttachmentPlaylist extends StatefulWidget {
     BuildContext context,
     int index,
   ) {
-    return const SizedBox.shrink();
+    return const Empty();
   }
 
   @override

packages/stream_chat_flutter/lib/src/autocomplete/stream_autocomplete.dart

@@ -228,7 +228,7 @@ class StreamAutocomplete extends StatefulWidget {
   /// place the text field in the AppBar and the options below in the main body.
   ///
   /// When following this pattern, [fieldViewBuilder] can return
-  /// `SizedBox.shrink()` so that nothing is drawn where the text field would
+  /// `EmptyWidget()` so that nothing is drawn where the text field would
   /// normally be. A separate text field can be created elsewhere, and a
   /// FocusNode and StreamMessageEditingController can be passed both to that
   /// text field and to StreamAutocomplete.

packages/stream_chat_flutter/lib/src/autocomplete/stream_command_autocomplete_options.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:stream_chat_flutter/src/misc/empty_widget.dart';
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 
 /// {@template commands_overlay}
@@ -31,7 +32,7 @@ class StreamCommandAutocompleteOptions extends StatelessWidget {
       return normalizedName.contains(normalizedQuery);
     });
 
-    if (commands == null || commands.isEmpty) return const SizedBox.shrink();
+    if (commands == null || commands.isEmpty) return const Empty();
 
     final streamChatTheme = StreamChatTheme.of(context);
     final colorTheme = streamChatTheme.colorTheme;

packages/stream_chat_flutter/lib/src/autocomplete/stream_mention_autocomplete_options.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:stream_chat_flutter/src/misc/empty_widget.dart';
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 
 /// {@template user_mentions_overlay}
@@ -78,8 +79,8 @@ class _StreamMentionAutocompleteOptionsState
     return FutureBuilder<List<User>>(
       future: userMentionsFuture,
       builder: (context, snapshot) {
-        if (snapshot.hasError) return const SizedBox.shrink();
-        if (!snapshot.hasData) return const SizedBox.shrink();
+        if (snapshot.hasError) return const Empty();
+        if (!snapshot.hasData) return const Empty();
         final users = snapshot.data!;
 
         return StreamAutocompleteOptions<User>(