Struct ratatui::terminal::Terminal

source · 
pub struct Terminal<B>where
    B: Backend,{ /* private fields */ }
Expand description

Interface to the terminal backed by Termion

Implementations§

source§

impl<B> Terminal<B>where B: Backend,

source

pub fn new(backend: B) -> Result<Terminal<B>>

Wrapper around Terminal initialization. Each buffer is initialized with a blank string and default colors for the foreground and the background

Examples found in repository?
examples/panic.rs (line 75)
69
70
71
72
73
74
75
76
77
78
79

fn init_terminal() -> Result<Terminal<CrosstermBackend<io::Stdout>>> {
    crossterm::execute!(io::stdout(), EnterAlternateScreen)?;
    enable_raw_mode()?;

    let backend = CrosstermBackend::new(io::stdout());

    let mut terminal = Terminal::new(backend)?;
    terminal.hide_cursor()?;

    Ok(terminal)
}
More examples
Hide additional examples
examples/block.rs (line 22)
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let res = run_app(&mut terminal);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
examples/custom_widget.rs (line 40)
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let res = run_app(&mut terminal);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
examples/layout.rs (line 20)
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let res = run_app(&mut terminal);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
examples/popup.rs (line 33)
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let app = App::new();
    let res = run_app(&mut terminal, app);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
examples/table.rs (line 82)
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let app = App::new();
    let res = run_app(&mut terminal, app);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
Additional examples can be found in:
source

pub fn with_options(backend: B, options: TerminalOptions) -> Result<Terminal<B>>

Examples found in repository?
examples/inline.rs (lines 77-82)
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100

fn main() -> Result<(), Box<dyn Error>> {
    crossterm::terminal::enable_raw_mode()?;
    let stdout = io::stdout();
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::with_options(
        backend,
        TerminalOptions {
            viewport: Viewport::Inline(8),
        },
    )?;

    let (tx, rx) = mpsc::channel();
    input_handling(tx.clone());
    let workers = workers(tx);
    let mut downloads = downloads();

    for w in &workers {
        let d = downloads.next(w.id).unwrap();
        w.tx.send(d).unwrap();
    }

    run_app(&mut terminal, workers, downloads, rx)?;

    crossterm::terminal::disable_raw_mode()?;
    terminal.clear()?;

    Ok(())
}
source

pub fn get_frame(&mut self) -> Frame<'_, B>

Get a Frame object which provides a consistent view into the terminal state for rendering.

source

pub fn current_buffer_mut(&mut self) -> &mut Buffer

source

pub fn backend(&self) -> &B

source

pub fn backend_mut(&mut self) -> &mut B

Examples found in repository?
examples/block.rs (line 30)
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let res = run_app(&mut terminal);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
More examples
Hide additional examples
examples/custom_widget.rs (line 48)
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let res = run_app(&mut terminal);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
examples/layout.rs (line 28)
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let res = run_app(&mut terminal);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
examples/popup.rs (line 42)
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let app = App::new();
    let res = run_app(&mut terminal, app);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
examples/table.rs (line 91)
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let app = App::new();
    let res = run_app(&mut terminal, app);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
examples/tabs.rs (line 57)
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let app = App::new();
    let res = run_app(&mut terminal, app);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
Additional examples can be found in:
source

pub fn flush(&mut self) -> Result<()>

Obtains a difference between the previous and the current buffer and passes it to the current backend for drawing.

source

pub fn resize(&mut self, size: Rect) -> Result<()>

Updates the Terminal so that internal buffers match the requested size. Requested size will be saved so the size can remain consistent when rendering. This leads to a full clear of the screen.

source

pub fn autoresize(&mut self) -> Result<()>

Queries the backend for size and resizes if it doesn’t match the previous size.

Examples found in repository?
examples/inline.rs (line 185)
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224

fn run_app<B: Backend>(
    terminal: &mut Terminal<B>,
    workers: Vec<Worker>,
    mut downloads: Downloads,
    rx: mpsc::Receiver<Event>,
) -> Result<(), Box<dyn Error>> {
    let mut redraw = true;
    loop {
        if redraw {
            terminal.draw(|f| ui(f, &downloads))?;
        }
        redraw = true;

        match rx.recv()? {
            Event::Input(event) => {
                if event.code == crossterm::event::KeyCode::Char('q') {
                    break;
                }
            }
            Event::Resize => {
                terminal.autoresize()?;
            }
            Event::Tick => {}
            Event::DownloadUpdate(worker_id, _download_id, progress) => {
                let download = downloads.in_progress.get_mut(&worker_id).unwrap();
                download.progress = progress;
                redraw = false
            }
            Event::DownloadDone(worker_id, download_id) => {
                let download = downloads.in_progress.remove(&worker_id).unwrap();
                terminal.insert_before(1, |buf| {
                    Paragraph::new(Line::from(vec![
                        Span::from("Finished "),
                        Span::styled(
                            format!("download {download_id}"),
                            Style::default().add_modifier(Modifier::BOLD),
                        ),
                        Span::from(format!(
                            " in {}ms",
                            download.started_at.elapsed().as_millis()
                        )),
                    ]))
                    .render(buf.area, buf);
                })?;
                match downloads.next(worker_id) {
                    Some(d) => workers[worker_id].tx.send(d).unwrap(),
                    None => {
                        if downloads.in_progress.is_empty() {
                            terminal.insert_before(1, |buf| {
                                Paragraph::new("Done !").render(buf.area, buf);
                            })?;
                            break;
                        }
                    }
                };
            }
        };
    }
    Ok(())
}
source

pub fn draw<F>(&mut self, f: F) -> Result<CompletedFrame<'_>>where F: FnOnce(&mut Frame<'_, B>),

Synchronizes terminal size, calls the rendering closure, flushes the current internal state and prepares for the next draw call.

Examples found in repository?
examples/block.rs (line 45)
43
44
45
46
47
48
49
50
51
52
53

fn run_app<B: Backend>(terminal: &mut Terminal<B>) -> io::Result<()> {
    loop {
        terminal.draw(ui)?;

        if let Event::Key(key) = event::read()? {
            if let KeyCode::Char('q') = key.code {
                return Ok(());
            }
        }
    }
}
More examples
Hide additional examples
examples/custom_widget.rs (line 63)
61
62
63
64
65
66
67
68
69
70
71

fn run_app<B: Backend>(terminal: &mut Terminal<B>) -> io::Result<()> {
    loop {
        terminal.draw(ui)?;

        if let Event::Key(key) = event::read()? {
            if let KeyCode::Char('q') = key.code {
                return Ok(());
            }
        }
    }
}
examples/layout.rs (line 43)
41
42
43
44
45
46
47
48
49
50
51

fn run_app<B: Backend>(terminal: &mut Terminal<B>) -> io::Result<()> {
    loop {
        terminal.draw(|f| ui(f))?;

        if let Event::Key(key) = event::read()? {
            if let KeyCode::Char('q') = key.code {
                return Ok(());
            }
        }
    }
}
examples/popup.rs (line 57)
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69

fn run_app<B: Backend>(terminal: &mut Terminal<B>, mut app: App) -> io::Result<()> {
    loop {
        terminal.draw(|f| ui(f, &app))?;

        if let Event::Key(key) = event::read()? {
            if key.kind == KeyEventKind::Press {
                match key.code {
                    KeyCode::Char('q') => return Ok(()),
                    KeyCode::Char('p') => app.show_popup = !app.show_popup,
                    _ => {}
                }
            }
        }
    }
}
examples/tabs.rs (line 72)
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85

fn run_app<B: Backend>(terminal: &mut Terminal<B>, mut app: App) -> io::Result<()> {
    loop {
        terminal.draw(|f| ui(f, &app))?;

        if let Event::Key(key) = event::read()? {
            if key.kind == KeyEventKind::Press {
                match key.code {
                    KeyCode::Char('q') => return Ok(()),
                    KeyCode::Right => app.next(),
                    KeyCode::Left => app.previous(),
                    _ => {}
                }
            }
        }
    }
}
examples/table.rs (line 106)
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119

fn run_app<B: Backend>(terminal: &mut Terminal<B>, mut app: App) -> io::Result<()> {
    loop {
        terminal.draw(|f| ui(f, &mut app))?;

        if let Event::Key(key) = event::read()? {
            if key.kind == KeyEventKind::Press {
                match key.code {
                    KeyCode::Char('q') => return Ok(()),
                    KeyCode::Down => app.next(),
                    KeyCode::Up => app.previous(),
                    _ => {}
                }
            }
        }
    }
}
Additional examples can be found in:
source

pub fn hide_cursor(&mut self) -> Result<()>

Examples found in repository?
examples/panic.rs (line 76)
69
70
71
72
73
74
75
76
77
78
79

fn init_terminal() -> Result<Terminal<CrosstermBackend<io::Stdout>>> {
    crossterm::execute!(io::stdout(), EnterAlternateScreen)?;
    enable_raw_mode()?;

    let backend = CrosstermBackend::new(io::stdout());

    let mut terminal = Terminal::new(backend)?;
    terminal.hide_cursor()?;

    Ok(terminal)
}
source

pub fn show_cursor(&mut self) -> Result<()>

Examples found in repository?
examples/block.rs (line 34)
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let res = run_app(&mut terminal);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
More examples
Hide additional examples
examples/custom_widget.rs (line 52)
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let res = run_app(&mut terminal);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
examples/layout.rs (line 32)
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let res = run_app(&mut terminal);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
examples/popup.rs (line 46)
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let app = App::new();
    let res = run_app(&mut terminal, app);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
examples/table.rs (line 95)
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let app = App::new();
    let res = run_app(&mut terminal, app);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
examples/tabs.rs (line 61)
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68

fn main() -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let app = App::new();
    let res = run_app(&mut terminal, app);

    // restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{err:?}");
    }

    Ok(())
}
Additional examples can be found in:
source

pub fn get_cursor(&mut self) -> Result<(u16, u16)>

source

pub fn set_cursor(&mut self, x: u16, y: u16) -> Result<()>

source

pub fn clear(&mut self) -> Result<()>

Clear the terminal and force a full redraw on the next draw call.

Examples found in repository?
examples/inline.rs (line 97)
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100

fn main() -> Result<(), Box<dyn Error>> {
    crossterm::terminal::enable_raw_mode()?;
    let stdout = io::stdout();
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::with_options(
        backend,
        TerminalOptions {
            viewport: Viewport::Inline(8),
        },
    )?;

    let (tx, rx) = mpsc::channel();
    input_handling(tx.clone());
    let workers = workers(tx);
    let mut downloads = downloads();

    for w in &workers {
        let d = downloads.next(w.id).unwrap();
        w.tx.send(d).unwrap();
    }

    run_app(&mut terminal, workers, downloads, rx)?;

    crossterm::terminal::disable_raw_mode()?;
    terminal.clear()?;

    Ok(())
}
source

pub fn size(&self) -> Result<Rect>

Queries the real size of the backend.

source

pub fn insert_before<F>(&mut self, height: u16, draw_fn: F) -> Result<()>where F: FnOnce(&mut Buffer),

Insert some content before the current inline viewport. This has no effect when the viewport is fullscreen.

This function scrolls down the current viewport by the given height. The newly freed space is then made available to the draw_fn closure through a writable Buffer.

Before:

ⓘ
+-------------------+
|                   |
|      viewport     |
|                   |
+-------------------+

After:

ⓘ
+-------------------+
|      buffer       |
+-------------------+
+-------------------+
|                   |
|      viewport     |
|                   |
+-------------------+
Examples
Insert a single line before the current viewport
terminal.insert_before(1, |buf| {
    Paragraph::new(Line::from(vec![
        Span::raw("This line will be added "),
        Span::styled("before", Style::default().fg(Color::Blue)),
        Span::raw(" the current viewport")
    ])).render(buf.area, buf);
});
Examples found in repository?
examples/inline.rs (lines 195-208)
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224

fn run_app<B: Backend>(
    terminal: &mut Terminal<B>,
    workers: Vec<Worker>,
    mut downloads: Downloads,
    rx: mpsc::Receiver<Event>,
) -> Result<(), Box<dyn Error>> {
    let mut redraw = true;
    loop {
        if redraw {
            terminal.draw(|f| ui(f, &downloads))?;
        }
        redraw = true;

        match rx.recv()? {
            Event::Input(event) => {
                if event.code == crossterm::event::KeyCode::Char('q') {
                    break;
                }
            }
            Event::Resize => {
                terminal.autoresize()?;
            }
            Event::Tick => {}
            Event::DownloadUpdate(worker_id, _download_id, progress) => {
                let download = downloads.in_progress.get_mut(&worker_id).unwrap();
                download.progress = progress;
                redraw = false
            }
            Event::DownloadDone(worker_id, download_id) => {
                let download = downloads.in_progress.remove(&worker_id).unwrap();
                terminal.insert_before(1, |buf| {
                    Paragraph::new(Line::from(vec![
                        Span::from("Finished "),
                        Span::styled(
                            format!("download {download_id}"),
                            Style::default().add_modifier(Modifier::BOLD),
                        ),
                        Span::from(format!(
                            " in {}ms",
                            download.started_at.elapsed().as_millis()
                        )),
                    ]))
                    .render(buf.area, buf);
                })?;
                match downloads.next(worker_id) {
                    Some(d) => workers[worker_id].tx.send(d).unwrap(),
                    None => {
                        if downloads.in_progress.is_empty() {
                            terminal.insert_before(1, |buf| {
                                Paragraph::new("Done !").render(buf.area, buf);
                            })?;
                            break;
                        }
                    }
                };
            }
        };
    }
    Ok(())
}

Trait Implementations§

source§

impl<B> Debug for Terminal<B>where B: Backend + Debug,

source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
source§

impl<B> Drop for Terminal<B>where B: Backend,

source§

fn drop(&mut self)

Executes the destructor for this type. Read more

Auto Trait Implementations§

§

impl<B> RefUnwindSafe for Terminal<B>where B: RefUnwindSafe,

§

impl<B> Send for Terminal<B>where B: Send,

§

impl<B> Sync for Terminal<B>where B: Sync,

§

impl<B> Unpin for Terminal<B>where B: Unpin,

§

impl<B> UnwindSafe for Terminal<B>where B: UnwindSafe,

Blanket Implementations§

source§

impl<T> Any for Twhere T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for Twhere T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for Twhere T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T, U> Into<U> for Twhere U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T> Same<T> for T

§

type Output = T

Should always be Self
source§

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.