added attachment actions modal builder

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

@@ -18,6 +18,7 @@ class GiphyAttachment extends AttachmentWidget {
     this.onShowMessage,
     this.onReturnAction,
     this.onAttachmentTap,
+    this.attachmentActionsModalBuilder,
   }) : super(
           key: key,
           message: message,
@@ -34,6 +35,8 @@ class GiphyAttachment extends AttachmentWidget {
   /// Callback when attachment is tapped
   final VoidCallback? onAttachmentTap;
 
+  final AttachmentActionsBuilder? attachmentActionsModalBuilder;
+
   @override
   Widget build(BuildContext context) {
     final imageUrl =
@@ -250,6 +253,7 @@ class GiphyAttachment extends AttachmentWidget {
               userName: message.user?.name,
               message: message,
               onShowMessage: onShowMessage,
+              attachmentActionsModalBuilder: attachmentActionsModalBuilder,
             ),
           );
         },

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

@@ -21,6 +21,7 @@ class ImageAttachment extends AttachmentWidget {
     this.onShowMessage,
     this.onReturnAction,
     this.onAttachmentTap,
+    this.attachmentActionsModalBuilder,
   }) : super(
           key: key,
           message: message,
@@ -43,6 +44,8 @@ class ImageAttachment extends AttachmentWidget {
   /// Callback when attachment is tapped
   final VoidCallback? onAttachmentTap;
 
+  final AttachmentActionsBuilder? attachmentActionsModalBuilder;
+
   @override
   Widget build(BuildContext context) => source.when(
         local: () {
@@ -145,6 +148,8 @@ class ImageAttachment extends AttachmentWidget {
                                     userName: message.user?.name,
                                     message: message,
                                     onShowMessage: onShowMessage,
+                                    attachmentActionsModalBuilder:
+                                        attachmentActionsModalBuilder,
                                   ),
                                 );
                               },

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

@@ -18,6 +18,7 @@ class VideoAttachment extends AttachmentWidget {
     this.onShowMessage,
     this.onReturnAction,
     this.onAttachmentTap,
+    this.attachmentActionsModalBuilder,
   }) : super(
           key: key,
           message: message,
@@ -37,6 +38,8 @@ class VideoAttachment extends AttachmentWidget {
   /// Callback when attachment is tapped
   final VoidCallback? onAttachmentTap;
 
+  final AttachmentActionsBuilder? attachmentActionsModalBuilder;
+
   @override
   Widget build(BuildContext context) => source.when(
         local: () {
@@ -91,6 +94,8 @@ class VideoAttachment extends AttachmentWidget {
                               userName: message.user?.name,
                               message: message,
                               onShowMessage: onShowMessage,
+                              attachmentActionsModalBuilder:
+                                  attachmentActionsModalBuilder,
                             ),
                           ),
                         ),

packages/stream_chat_flutter/lib/src/attachment_actions_modal.dart

@@ -57,6 +57,32 @@ class AttachmentActionsModal extends StatelessWidget {
   /// Show delete option
   final bool showDelete;
 
+  /// Creates a copy of [MessageWidget] with specified attributes overridden.
+  AttachmentActionsModal copyWith({
+    Key? key,
+    int? currentIndex,
+    Message? message,
+    VoidCallback? onShowMessage,
+    AttachmentDownloader? imageDownloader,
+    AttachmentDownloader? fileDownloader,
+    bool? showReply,
+    bool? showShowInChat,
+    bool? showSave,
+    bool? showDelete,
+  }) =>
+      AttachmentActionsModal(
+        key: key ?? this.key,
+        currentIndex: currentIndex ?? this.currentIndex,
+        message: message ?? this.message,
+        onShowMessage: onShowMessage ?? this.onShowMessage,
+        imageDownloader: imageDownloader ?? this.imageDownloader,
+        fileDownloader: fileDownloader ?? this.fileDownloader,
+        showReply: showReply ?? this.showReply,
+        showShowInChat: showShowInChat ?? this.showShowInChat,
+        showSave: showSave ?? this.showSave,
+        showDelete: showDelete ?? this.showDelete,
+      );
+
   @override
   Widget build(BuildContext context) => GestureDetector(
         behavior: HitTestBehavior.translucent,

packages/stream_chat_flutter/lib/src/full_screen_media.dart

@@ -33,10 +33,7 @@ class FullScreenMedia extends StatefulWidget {
     this.startIndex = 0,
     String? userName,
     this.onShowMessage,
-    this.showReply = true,
-    this.showShowInChat = true,
-    this.showSave = true,
-    this.showDelete = true,
+    this.attachmentActionsModalBuilder,
   })  : userName = userName ?? '',
         super(key: key);
 
@@ -55,17 +52,7 @@ class FullScreenMedia extends StatefulWidget {
   /// Callback for when show message is tapped
   final ShowMessageCallback? onShowMessage;
 
-  /// Show reply option
-  final bool showReply;
-
-  /// Show show in chat option
-  final bool showShowInChat;
-
-  /// Show save option
-  final bool showSave;
-
-  /// Show delete option
-  final bool showDelete;
+  final AttachmentActionsBuilder? attachmentActionsModalBuilder;
 
   @override
   _FullScreenMediaState createState() => _FullScreenMediaState();
@@ -212,10 +199,8 @@ class _FullScreenMediaState extends State<FullScreenMedia>
                         StreamChannel.of(context).channel,
                       );
                     },
-                    showReply: widget.showReply,
-                    showShowInChat: widget.showShowInChat,
-                    showSave: widget.showSave,
-                    showDelete: widget.showDelete,
+                    attachmentActionsModalBuilder:
+                        widget.attachmentActionsModalBuilder,
                   ),
                   if (!widget.message.isEphemeral)
                     GalleryFooter(

packages/stream_chat_flutter/lib/src/gallery_header.dart

@@ -6,6 +6,12 @@ import 'package:stream_chat_flutter/src/stream_svg_icon.dart';
 import 'package:stream_chat_flutter/src/theme/themes.dart';
 import 'package:stream_chat_flutter_core/stream_chat_flutter_core.dart';
 
+typedef AttachmentActionsBuilder = Widget Function(
+  BuildContext context,
+  Attachment attachment,
+  AttachmentActionsModal defaultActionsModal,
+);
+
 /// Header/AppBar widget for media display screen
 class GalleryHeader extends StatelessWidget implements PreferredSizeWidget {
   /// Creates a channel header
@@ -21,10 +27,7 @@ class GalleryHeader extends StatelessWidget implements PreferredSizeWidget {
     this.userName = '',
     this.sentAt = '',
     this.backgroundColor,
-    this.showReply = true,
-    this.showShowInChat = true,
-    this.showSave = true,
-    this.showDelete = true,
+    this.attachmentActionsModalBuilder,
   })  : preferredSize = const Size.fromHeight(kToolbarHeight),
         super(key: key);
 
@@ -59,17 +62,7 @@ class GalleryHeader extends StatelessWidget implements PreferredSizeWidget {
   /// The background color of this [GalleryHeader].
   final Color? backgroundColor;
 
-  /// Show reply option
-  final bool showReply;
-
-  /// Show show in chat option
-  final bool showShowInChat;
-
-  /// Show save option
-  final bool showSave;
-
-  /// Show delete option
-  final bool showDelete;
+  final AttachmentActionsBuilder? attachmentActionsModalBuilder;
 
   @override
   Widget build(BuildContext context) {
@@ -139,21 +132,26 @@ class GalleryHeader extends StatelessWidget implements PreferredSizeWidget {
     final galleryHeaderThemeData =
         StreamChatTheme.of(context).galleryHeaderTheme;
 
+    final defaultModal = AttachmentActionsModal(
+      message: message,
+      currentIndex: currentIndex,
+      onShowMessage: onShowMessage,
+    );
+
+    final effectiveModal = attachmentActionsModalBuilder?.call(
+          context,
+          message.attachments[currentIndex],
+          defaultModal,
+        ) ??
+        defaultModal;
+
     final result = await showDialog(
       useRootNavigator: false,
       context: context,
       barrierColor: galleryHeaderThemeData.bottomSheetBarrierColor,
       builder: (context) => StreamChannel(
         channel: channel,
-        child: AttachmentActionsModal(
-          message: message,
-          currentIndex: currentIndex,
-          onShowMessage: onShowMessage,
-          showReply: showReply,
-          showShowInChat: showShowInChat,
-          showSave: showSave,
-          showDelete: showDelete,
-        ),
+        child: effectiveModal,
       ),
     );
 

packages/stream_chat_flutter/lib/src/image_group.dart

@@ -16,6 +16,7 @@ class ImageGroup extends StatelessWidget {
     this.onReturnAction,
     this.onShowMessage,
     this.onAttachmentTap,
+    this.attachmentActionsModalBuilder,
   }) : super(key: key);
 
   /// List of attachments to show
@@ -39,6 +40,8 @@ class ImageGroup extends StatelessWidget {
   /// Callback for when show message is tapped
   final ShowMessageCallback? onShowMessage;
 
+  final AttachmentActionsBuilder? attachmentActionsModalBuilder;
+
   @override
   Widget build(BuildContext context) => ConstrainedBox(
         constraints: BoxConstraints.loose(size),
@@ -138,6 +141,7 @@ class ImageGroup extends StatelessWidget {
             userName: message.user?.name,
             message: message,
             onShowMessage: onShowMessage,
+            attachmentActionsModalBuilder: attachmentActionsModalBuilder,
           ),
         ),
       ),
@@ -151,5 +155,6 @@ class ImageGroup extends StatelessWidget {
         message: message,
         messageTheme: messageTheme,
         onAttachmentTap: () => _onTap(context, index),
+        attachmentActionsModalBuilder: attachmentActionsModalBuilder,
       );
 }