check signal on publish

Textualize / textual

The lean application framework for Python. Build sophisticated user interfaces with a simple Python API. Run your apps in the terminal and a web browser.

https://textual.textualize.io/

MIT License

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check signal on publish #4635

Closed willmcgugan closed 3 months ago

willmcgugan commented 3 months ago

Signals are proving problematic since they can be sent at arbitrary points.

This prevents publishing signals while the DOM is shutting down.

Fixes https://github.com/Textualize/textual/issues/4634