feat: Icons are now disabled according to file type chosen

lib/src/message_input.dart

@@ -108,7 +108,6 @@ class MessageInput extends StatefulWidget {
     this.actionsLocation = ActionsLocation.left,
     this.attachmentThumbnailBuilders,
     this.focusNode,
-    this.enableFileAndImageAttachment = false,
   }) : super(key: key);
 
   /// Message to edit
@@ -157,9 +156,6 @@ class MessageInput extends StatefulWidget {
   /// The focus node associated to the TextField
   final FocusNode focusNode;
 
-  /// Enables adding both file+images at the same time
-  final bool enableFileAndImageAttachment;
-
   @override
   MessageInputState createState() => MessageInputState();
 
@@ -662,6 +658,34 @@ class MessageInputState extends State<MessageInput> {
   }
 
   Widget _buildFilePickerSection() {
+    var _attachmentContainsFile =
+        _attachments.any((element) => element.attachment.type == 'file');
+
+    Color _getIconColor(int index) {
+      switch (index) {
+        case 0:
+          return _attachmentContainsFile && _attachments.isNotEmpty
+              ? Colors.black.withOpacity(0.2)
+              : Colors.black.withOpacity(0.5);
+          break;
+        case 1:
+          return !_attachmentContainsFile && _attachments.isNotEmpty
+              ? Colors.black.withOpacity(0.2)
+              : Colors.black.withOpacity(0.5);
+          break;
+        case 2:
+          return _attachmentContainsFile && _attachments.isNotEmpty
+              ? Colors.black.withOpacity(0.2)
+              : Colors.black.withOpacity(0.5);
+          break;
+        case 3:
+          return _attachmentContainsFile && _attachments.isNotEmpty
+              ? Colors.black.withOpacity(0.2)
+              : Colors.black.withOpacity(0.5);
+          break;
+      }
+    }
+
     return AnimatedContainer(
       duration: _animateContainer ? Duration(milliseconds: 300) : Duration.zero,
       height: _openFilePickerSection ? _filePickerSize : 0,
@@ -675,11 +699,11 @@ class MessageInputState extends State<MessageInput> {
                 IconButton(
                   iconSize: 24,
                   icon: StreamSvgIcon.pictures(
-                    color: _filePickerIndex == 0
+                    color: _getIconColor(0),
-                        ? StreamChatTheme.of(context).accentColor
-                        : Colors.black.withOpacity(0.5),
                   ),
-                  onPressed: () {
+                  onPressed: _attachmentContainsFile && _attachments.isNotEmpty
+                      ? null
+                      : () {
                           setState(() {
                             _filePickerIndex = 0;
                           });
@@ -688,22 +712,22 @@ class MessageInputState extends State<MessageInput> {
                 IconButton(
                   iconSize: 32,
                   icon: StreamSvgIcon.files(
-                    color: _filePickerIndex == 1
+                    color: _getIconColor(1),
-                        ? StreamChatTheme.of(context).accentColor
-                        : Colors.black.withOpacity(0.5),
                   ),
-                  onPressed: () {
+                  onPressed: !_attachmentContainsFile && _attachments.isNotEmpty
+                      ? null
+                      : () {
                           pickFile(DefaultAttachmentTypes.file, false);
                         },
                 ),
                 IconButton(
                   iconSize: 24,
                   icon: StreamSvgIcon.camera(
-                    color: _filePickerIndex == 2
+                    color: _getIconColor(2),
-                        ? StreamChatTheme.of(context).accentColor
-                        : Colors.black.withOpacity(0.5),
                   ),
-                  onPressed: () {
+                  onPressed: _attachmentContainsFile && _attachments.isNotEmpty
+                      ? null
+                      : () {
                           pickFile(DefaultAttachmentTypes.image, true);
                         },
                 ),
@@ -711,11 +735,11 @@ class MessageInputState extends State<MessageInput> {
                   padding: const EdgeInsets.all(0),
                   iconSize: 24,
                   icon: StreamSvgIcon.record(
-                    color: _filePickerIndex == 3
+                    color: _getIconColor(3),
-                        ? StreamChatTheme.of(context).accentColor
-                        : Colors.black.withOpacity(0.5),
                   ),
-                  onPressed: () {
+                  onPressed: _attachmentContainsFile && _attachments.isNotEmpty
+                      ? null
+                      : () {
                           pickFile(DefaultAttachmentTypes.video, true);
                         },
                 ),
@@ -774,6 +798,9 @@ class MessageInputState extends State<MessageInput> {
   }
 
   Widget _buildPickerSection() {
+    var _attachmentContainsFile =
+        _attachments.any((element) => element.attachment.type == 'file');
+
     switch (_filePickerIndex) {
       case 0:
         return FutureBuilder<bool>(
@@ -786,19 +813,14 @@ class MessageInputState extends State<MessageInput> {
               }
 
               if (snapshot.data) {
-                return MediaListView(
+                return IgnorePointer(
+                  ignoring: _attachmentContainsFile,
+                  child: MediaListView(
                     selectedIds: _attachments.map((e) => e.id).toList(),
                     onSelect: (media) async {
                       if (!_attachments
                           .any((element) => element.id == media.id)) {
-                      if (widget.enableFileAndImageAttachment) {
                         _addAttachment(media);
-                      } else {
-                        if (!_attachments.any(
-                            (element) => element.attachment?.type == 'file')) {
-                          _addAttachment(media);
-                        }
-                      }
                       } else {
                         setState(() {
                           _attachments
@@ -806,6 +828,7 @@ class MessageInputState extends State<MessageInput> {
                         });
                       }
                     },
+                  ),
                 );
               }
 
@@ -1581,11 +1604,6 @@ class MessageInputState extends State<MessageInput> {
         bytes: bytes,
       );
     } else {
-      if (_attachments.any((element) => element.attachment.type != 'file') &&
-          !widget.enableFileAndImageAttachment) {
-        return;
-      }
-
       FileType type;
       if (fileType == DefaultAttachmentTypes.image) {
         type = FileType.image;