Add the ability to dismiss the keyboard by tapping outside of the text area

commet/lib/ui/atoms/dismiss_keyboard.dart

@@ -0,0 +1,20 @@
+import 'package:flutter/material.dart';
+
+class DismissKeyboard extends StatelessWidget {
+  final Widget child;
+  const DismissKeyboard({Key? key, required this.child}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      onTap: () {
+        FocusScopeNode currentFocus = FocusScope.of(context);
+        if (!currentFocus.hasPrimaryFocus &&
+            currentFocus.focusedChild != null) {
+          FocusManager.instance.primaryFocus?.unfocus();
+        }
+      },
+      child: child,
+    );
+  }
+}

commet/lib/ui/atoms/keyboard_adaptor.dart

@@ -1,5 +1,6 @@
 import 'dart:math';
 
+import 'package:commet/ui/atoms/dismiss_keyboard.dart';
 import 'package:commet/ui/atoms/scaled_safe_area.dart';
 import 'package:commet/utils/scaled_app.dart';
 import 'package:flutter/material.dart';
@@ -14,9 +15,10 @@ class KeyboardAdaptor extends StatelessWidget {
     var scaledQuery = MediaQuery.of(context).scale();
     var offset = max(scaledQuery.viewInsets.bottom, scaledQuery.padding.bottom);
 
-    return ScaledSafeArea(
-        bottom: false,
-        child: Padding(
-            padding: EdgeInsets.fromLTRB(0, 0, 0, offset), child: child));
+    return DismissKeyboard(
+        child: ScaledSafeArea(
+            bottom: false,
+            child: Padding(
+                padding: EdgeInsets.fromLTRB(0, 0, 0, offset), child: child)));
   }
 }

commet/lib/ui/molecules/message_input.dart

@@ -315,6 +315,15 @@ class MessageInputState extends State<MessageInput> {
       }
 
       if (HardwareKeyboard.instance.isShiftPressed) {
+        String text = controller.text;
+        TextSelection textSelection = controller.selection;
+        String newText =
+            text.replaceRange(textSelection.start, textSelection.end, "\n");
+        controller.text = newText;
+        controller.selection = textSelection.copyWith(
+          baseOffset: textSelection.start + 1,
+          extentOffset: textSelection.start + 1,
+        );
         return KeyEventResult.ignored;
       }