mirror of
https://github.com/ratatui-org/ratatui
synced 2024-11-22 12:43:16 +00:00
74a32afbae
`crossterm`, `termion`, and `termwiz` can now be accessed as
`ratatui::{crossterm, termion, termwiz}` respectively. This makes it
possible to just add the Ratatui crate as a dependency and use the
backend of choice without having to add the backend crates as
dependencies.
To update existing code, replace all instances of `crossterm::` with
`ratatui::crossterm::`, `termion::` with `ratatui::termion::`, and
`termwiz::` with `ratatui::termwiz::`.
63 lines
2 KiB
Rust
63 lines
2 KiB
Rust
#[cfg(feature = "termion")]
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#[test]
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fn backend_termion_should_only_write_diffs() -> Result<(), Box<dyn std::error::Error>> {
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use std::{fmt::Write, io::Cursor};
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let mut bytes = Vec::new();
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let mut stdout = Cursor::new(&mut bytes);
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{
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use ratatui::{
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backend::TermionBackend, layout::Rect, widgets::Paragraph, Terminal, TerminalOptions,
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Viewport,
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};
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let backend = TermionBackend::new(&mut stdout);
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let area = Rect::new(0, 0, 3, 1);
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let mut terminal = Terminal::with_options(
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backend,
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TerminalOptions {
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viewport: Viewport::Fixed(area),
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},
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)?;
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terminal.draw(|f| {
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f.render_widget(Paragraph::new("a"), area);
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})?;
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terminal.draw(|f| {
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f.render_widget(Paragraph::new("ab"), area);
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})?;
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terminal.draw(|f| {
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f.render_widget(Paragraph::new("abc"), area);
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})?;
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}
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let expected = {
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use ratatui::termion::{color, cursor, style};
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let mut s = String::new();
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// First draw
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write!(s, "{}", cursor::Goto(1, 1))?;
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s.push('a');
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write!(s, "{}", color::Fg(color::Reset))?;
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write!(s, "{}", color::Bg(color::Reset))?;
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write!(s, "{}", style::Reset)?;
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write!(s, "{}", cursor::Hide)?;
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// Second draw
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write!(s, "{}", cursor::Goto(2, 1))?;
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s.push('b');
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write!(s, "{}", color::Fg(color::Reset))?;
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write!(s, "{}", color::Bg(color::Reset))?;
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write!(s, "{}", style::Reset)?;
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write!(s, "{}", cursor::Hide)?;
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// Third draw
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write!(s, "{}", cursor::Goto(3, 1))?;
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s.push('c');
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write!(s, "{}", color::Fg(color::Reset))?;
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write!(s, "{}", color::Bg(color::Reset))?;
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write!(s, "{}", style::Reset)?;
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write!(s, "{}", cursor::Hide)?;
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// Terminal drop
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write!(s, "{}", cursor::Show)?;
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s
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};
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assert_eq!(std::str::from_utf8(&bytes)?, expected);
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Ok(())
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}
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