Auto scroll when cursor moves out of the screen inside the TextArea

[rodrigogiraoserrao]

When typing inside the text area, if you change lines and the new line is not visible, the screen should probably scroll so that the new line becomes visible.

Current behaviour:

Screen.Recording.2023-10-10.at.10.13.26.mov

[willmcgugan]

Is the text area off the bottom of the screen? What happens if you put a border around the text area? Do you see the bottom border?

[rodrigogiraoserrao]

The text area is off the bottom of the screen, yes.
The bottom border is not visible, no.

Screen.Recording.2023-10-10.at.10.26.29.mov

[davep]

Isn't this essentially a problem for all widgets that implement a cursor of some description? Or moreover, isn't this a styling choice within the app? For example:

from textual.app import App, ComposeResult
from textual.widgets import OptionList

class ScrollApp(App[None]):

    def compose(self) -> ComposeResult:
        yield OptionList(
            *[f"This is option {n}" for n in range(500)]
        )

if __name__ == "__main__":
    ScrollApp().run()

You could probably do similar with DataTable there too.

[willmcgugan]

Then I don't think it should scroll. It's too much to expect a widget to keep its cursor visible within its container.

[rodrigogiraoserrao]

It's “too much” in what sense? Isn't this the expected behaviour?

[willmcgugan]

Maybe. But it seems a low priority. We can revisit it later.

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