change behavior for read only

src/textual/widgets/_text_area.py

@@ -540,23 +540,25 @@ def _get_builtin_highlight_query(language_name: str) -> str:
                 Path(_HIGHLIGHTS_PATH.resolve()) / f"{language_name}.scm"
             )
             highlight_query = highlight_query_path.read_text()
-        except OSError as e:
-            log.warning(f"Unable to load highlight query. {e}")
+        except OSError as error:
+            log.warning(f"Unable to load highlight query. {error}")
             highlight_query = ""
 
         return highlight_query
 
     def check_consume_key(self, key: str) -> bool:
         """Check if the widget may consume the given key.
 
-        As an text area we are expecting to capture printable keys.
+        As a textarea we are expecting to capture printable keys.
 
         Args:
             key: A key identifier.
 
         Returns:
             `True` if the widget may capture the key in it's `Key` message, or `False` if it won't.
         """
+        if self.read_only:
+            return False
         return len(key) == 1 and key.isprintable()
 
     def _build_highlight_map(self) -> None: