Textual Latex Parsing

main.py

from __future__ import annotations

import sys

from pylatexenc.latex2text import LatexNodes2Text
from textual import on
from textual.app import App, ComposeResult
from textual.widgets import Static, TextArea


class LatexApp(App[None]):
    CSS = """
    Screen {
        layout: horizontal;
        Static {
            width: 66%;
            padding: 2 5;
        }
    }
    """

    def compose(self) -> ComposeResult:
        yield TextArea(theme="css")
        yield Static(id="content")

    @on(TextArea.Changed)
    def _parse_latex(self, message: TextArea.Changed) -> None:
        latex = LatexNodes2Text().latex_to_text(message.text_area.text)

        self.query_one(Static).update(latex)


def main() -> None:
    sys.exit(LatexApp().run())


if __name__ == "__main__":
    main()