feat: add flag to disable new/old message loading on scroll

CHANGELOG.md

@@ -25,6 +25,7 @@
 - Added autoScrollTriggerOffset to the ChatPaginationControls to adjust when the auto scroll should be enabled
 - Added the ability to set the color of the CircularProgressIndicator of the ImageLoadingSnackbar by theme.snackBarTheme.actionTextColor
 - Added semantics for variable text, buttons and textfields
+- Added flag to enable/disable loading new and old messages on scrolling to the end of the current view.
 
 ## 4.0.0
 - Move to the new user story architecture

packages/flutter_chat/lib/src/config/chat_options.dart

@@ -302,6 +302,8 @@ class ChatPaginationControls {
     this.autoScrollTriggerOffset = 50.0,
     this.loadingIndicatorForNewMessages = true,
     this.loadingIndicatorForOldMessages = true,
+    this.loadNewMessagesOnScroll = true,
+    this.loadOldMessagesOnScroll = true,
     this.loadingNewMessageMinDuration = Duration.zero,
     this.loadingOldMessageMinDuration = Duration.zero,
   });
@@ -314,6 +316,15 @@ class ChatPaginationControls {
   /// chat. Defaults to 50.0
   final double autoScrollTriggerOffset;
 
+  /// Whether to load new messages when someone scrolls to the end of the chat
+  final bool loadNewMessagesOnScroll;
+
+  /// Whether to load older messages when scrolling towards the start of the
+  /// chat.
+  ///
+  /// If the messages are loaded by pagination, it is smart to add this.
+  final bool loadOldMessagesOnScroll;
+
   /// Whether to show a loading indicator for new messages loading
   final bool loadingIndicatorForNewMessages;
 

packages/flutter_chat/lib/src/screens/chat_detail/chat_detail_screen.dart

@@ -352,15 +352,19 @@ class _ChatBody extends HookWidget {
 
         var distanceFromBottom = maxScroll - offset;
 
+        if (options.paginationControls.loadOldMessagesOnScroll) {
           if (offset <= threshold && !isLoadingOlder.value) {
             unawaited(loadOlderMessages());
           }
+        }
 
+        if (options.paginationControls.loadNewMessagesOnScroll) {
           if (distanceFromBottom <= threshold &&
               !isLoadingNewer.value &&
               !autoScrollEnabled.value) {
             unawaited(loadNewerMessages());
           }
+        }
 
         if (distanceFromBottom > autoScrollThreshold) {
           autoScrollEnabled.value = false;