Coverage for src / lilbee / cli / tui / widgets / list_text_area.py: 100%

1"""TextArea subclass that posts a ``Blurred`` message on focus loss. 

2 

3Textual's built-in :class:`TextArea` only emits ``Changed`` and 

4``SelectionChanged`` messages. The settings screen needs to save list-typed 

5values on focus loss (same save-on-blur UX as :class:`Input`), so this 

6subclass posts a dedicated ``Blurred`` message after the default blur 

7handling runs. 

8""" 

9 

10from __future__ import annotations 

11 

12from textual.events import Blur 

13from textual.message import Message 

14from textual.widgets import TextArea 

15 

16 

17class ListTextArea(TextArea): 

18 """TextArea that posts a ``Blurred`` message when focus leaves it.""" 

19 

20 class Blurred(Message): 

21 """Posted after focus leaves the :class:`ListTextArea`.""" 

22 

23 def __init__(self, control: ListTextArea) -> None: 

24 super().__init__() 

25 self._control = control 

26 

27 @property 

28 def control(self) -> ListTextArea: 

29 """The widget that lost focus. Enables ``@on`` selector matching.""" 

30 return self._control 

31 

32 def _on_blur(self, event: Blur) -> None: 

33 super()._on_blur(event) 

34 self.post_message(self.Blurred(self))