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from textual import events
from textual.app import App, ComposeResult
from textual.widgets import TextArea
class ExtendedTextArea(TextArea):
"""A subclass of TextArea with parenthesis-closing functionality."""
def _on_key(self, event: events.Key) -> None:
if event.character == "(":
self.insert("()")
self.move_cursor_relative(columns=-1)
event.prevent_default()
class TextAreaKeyPressHook(App):
def compose(self) -> ComposeResult:
yield ExtendedTextArea.code_editor(language="python")
app = TextAreaKeyPressHook()
if __name__ == "__main__":
app.run()
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