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use std::io::stdout;
use std::io::Write;
use termion::raw::{IntoRawMode, RawTerminal};
use termion::screen::AlternateScreen;
use tui::backend::TermionBackend;
use tui::widgets::Widget;
pub struct TuiBackend {
pub terminal:
Option<tui::Terminal<TermionBackend<AlternateScreen<RawTerminal<std::io::Stdout>>>>>,
}
impl TuiBackend {
pub fn new() -> std::io::Result<Self> {
let stdout = std::io::stdout().into_raw_mode()?;
let stdout = AlternateScreen::from(stdout);
let backend = TermionBackend::new(stdout);
let mut terminal = tui::Terminal::new(backend)?;
terminal.hide_cursor()?;
Ok(Self {
terminal: Some(terminal),
})
}
pub fn render<W>(&mut self, widget: &mut W)
where
W: Widget,
{
self.terminal_mut().draw(|mut frame| {
let rect = frame.size();
widget.render(&mut frame, rect);
});
}
pub fn terminal_mut(
&mut self,
) -> &mut tui::Terminal<TermionBackend<AlternateScreen<RawTerminal<std::io::Stdout>>>> {
self.terminal.as_mut().unwrap()
}
pub fn terminal_drop(&mut self) {
let _ = self.terminal.take();
stdout().flush();
}
pub fn terminal_restore(&mut self) -> std::io::Result<()> {
let mut new_backend = TuiBackend::new()?;
std::mem::swap(&mut self.terminal, &mut new_backend.terminal);
Ok(())
}
}
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