feat: Add configurable chatTextFieldHeightFallback to ChatView

lib/src/extensions/extensions.dart

@@ -261,12 +261,14 @@ extension BuildContextExtension on BuildContext {
 
   /// This getter will provide the height of the text field from the
   /// current context if available, otherwise it will return the
-  /// default height of the text field.
+  /// configurable fallback height from [ChatViewInheritedWidget], or the
+  /// [defaultChatTextFieldHeight] if no fallback is configured.
   ///
   /// **Note**: Make sure the `chatTextFieldViewKey` is assigned to retrieve
   /// actual height of text field.
   double get textFieldHeight =>
       chatViewIW?.chatTextFieldViewKey.currentContext?.size?.height ??
+      chatViewIW?.chatTextFieldHeightFallback ??
       defaultChatTextFieldHeight;
 
   ChatViewInheritedWidget? get chatViewIW =>

lib/src/widgets/chat_view.dart

@@ -30,6 +30,7 @@ import 'package:flutter/material.dart';
 
 import '../extensions/extensions.dart';
 import '../inherited_widgets/configurations_inherited_widgets.dart';
+import '../utils/constants/constants.dart';
 import '../utils/timeago/timeago.dart';
 import '../values/custom_time_messages.dart';
 import '../values/enumeration.dart';
@@ -65,6 +66,7 @@ class ChatView extends StatefulWidget {
     this.replyMessageBuilder,
     this.replySuggestionsConfig,
     this.scrollToBottomButtonConfig,
+    this.chatTextFieldHeightFallback,
   })  : chatBackgroundConfig =
             chatBackgroundConfig ?? const ChatBackgroundConfiguration(),
         chatViewStateConfig =
@@ -152,6 +154,12 @@ class ChatView extends StatefulWidget {
   /// Provides a configuration for scroll to bottom button config
   final ScrollToBottomButtonConfig? scrollToBottomButtonConfig;
 
+  /// Fallback height used for the bottom padding of the message list when the
+  /// actual chat text field height cannot be determined from the layout.
+  /// This is useful to prevent the last message from being hidden behind the
+  /// chat input field. If not provided, defaults to [defaultChatTextFieldHeight].
+  final double? chatTextFieldHeightFallback;
+
   static void closeReplyMessageView(BuildContext context) {
     final state = context.findAncestorStateOfType<_ChatViewState>();
 
@@ -216,6 +224,8 @@ class _ChatViewState extends State<ChatView>
       featureActiveConfig: featureActiveConfig,
       profileCircleConfiguration: widget.profileCircleConfig,
       chatTextFieldViewKey: chatTextFieldViewKey,
+      chatTextFieldHeightFallback: widget.chatTextFieldHeightFallback ??
+          defaultChatTextFieldHeight,
       child: SuggestionsConfigIW(
         suggestionsConfig: widget.replySuggestionsConfig,
         child: ConfigurationsInheritedWidget(

lib/src/widgets/chat_view_inherited_widget.dart

@@ -25,6 +25,7 @@ import 'package:flutter/material.dart';
 
 import '../models/config_models/feature_active_config.dart';
 import '../models/config_models/profile_circle_configuration.dart';
+import '../utils/constants/constants.dart';
 import 'reaction_popup.dart';
 
 /// This widget for alternative of excessive amount of passing arguments
@@ -37,11 +38,18 @@ class ChatViewInheritedWidget extends InheritedWidget {
     required this.chatController,
     required this.chatTextFieldViewKey,
     this.profileCircleConfiguration,
+    this.chatTextFieldHeightFallback = defaultChatTextFieldHeight,
   }) : super(key: key, child: child);
   final FeatureActiveConfig featureActiveConfig;
   final ProfileCircleConfiguration? profileCircleConfiguration;
   final ChatController chatController;
   final GlobalKey chatTextFieldViewKey;
+
+  /// Fallback height used for the bottom padding of the message list when the
+  /// actual chat text field height cannot be determined from the layout.
+  /// Defaults to [defaultChatTextFieldHeight].
+  final double chatTextFieldHeightFallback;
+
   final ValueNotifier<bool> showPopUp = ValueNotifier(false);
   final ValueNotifier<double> chatTextFieldHeight = ValueNotifier(0.0);
   final GlobalKey<ReactionPopupState> reactionPopupKey = GlobalKey();
@@ -51,5 +59,6 @@ class ChatViewInheritedWidget extends InheritedWidget {
 
   @override
   bool updateShouldNotify(covariant ChatViewInheritedWidget oldWidget) =>
-      oldWidget.featureActiveConfig != featureActiveConfig;
+      oldWidget.featureActiveConfig != featureActiveConfig ||
+      oldWidget.chatTextFieldHeightFallback != chatTextFieldHeightFallback;
 }