1 #[allow(dead_code)]
2 mod util;
3
4 use crate::util::event::{Event, Events};
5 use std::{error::Error, io};
6 use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
7 use tui::{
8 backend::TermionBackend,
9 layout::{Alignment, Constraint, Direction, Layout},
10 style::{Color, Modifier, Style},
11 text::{Span, Spans},
12 widgets::{Block, Borders, Paragraph, Wrap},
13 Terminal,
14 };
15
main() -> Result<(), Box<dyn Error>>16 fn main() -> Result<(), Box<dyn Error>> {
17 // Terminal initialization
18 let stdout = io::stdout().into_raw_mode()?;
19 let stdout = MouseTerminal::from(stdout);
20 let stdout = AlternateScreen::from(stdout);
21 let backend = TermionBackend::new(stdout);
22 let mut terminal = Terminal::new(backend)?;
23
24 let events = Events::new();
25
26 let mut scroll: u16 = 0;
27 loop {
28 terminal.draw(|f| {
29 let size = f.size();
30
31 // Words made "loooong" to demonstrate line breaking.
32 let s = "Veeeeeeeeeeeeeeeery loooooooooooooooooong striiiiiiiiiiiiiiiiiiiiiiiiiing. ";
33 let mut long_line = s.repeat(usize::from(size.width) / s.len() + 4);
34 long_line.push('\n');
35
36 let block = Block::default()
37 .style(Style::default().bg(Color::White).fg(Color::Black));
38 f.render_widget(block, size);
39
40 let chunks = Layout::default()
41 .direction(Direction::Vertical)
42 .margin(5)
43 .constraints(
44 [
45 Constraint::Percentage(25),
46 Constraint::Percentage(25),
47 Constraint::Percentage(25),
48 Constraint::Percentage(25),
49 ]
50 .as_ref(),
51 )
52 .split(size);
53
54 let text = vec![
55 Spans::from("This is a line "),
56 Spans::from(Span::styled("This is a line ", Style::default().fg(Color::Red))),
57 Spans::from(Span::styled("This is a line", Style::default().bg(Color::Blue))),
58 Spans::from(Span::styled(
59 "This is a longer line",
60 Style::default().add_modifier(Modifier::CROSSED_OUT),
61 )),
62 Spans::from(Span::styled(&long_line, Style::default().bg(Color::Green))),
63 Spans::from(Span::styled(
64 "This is a line",
65 Style::default().fg(Color::Green).add_modifier(Modifier::ITALIC),
66 )),
67 ];
68
69 let create_block = |title| {
70 Block::default()
71 .borders(Borders::ALL)
72 .style(Style::default().bg(Color::White).fg(Color::Black))
73 .title(Span::styled(title, Style::default().add_modifier(Modifier::BOLD)))
74 };
75 let paragraph = Paragraph::new(text.clone())
76 .style(Style::default().bg(Color::White).fg(Color::Black))
77 .block(create_block("Left, no wrap"))
78 .alignment(Alignment::Left);
79 f.render_widget(paragraph, chunks[0]);
80 let paragraph = Paragraph::new(text.clone())
81 .style(Style::default().bg(Color::White).fg(Color::Black))
82 .block(create_block("Left, wrap"))
83 .alignment(Alignment::Left)
84 .wrap(Wrap { trim: true });
85 f.render_widget(paragraph, chunks[1]);
86 let paragraph = Paragraph::new(text.clone())
87 .style(Style::default().bg(Color::White).fg(Color::Black))
88 .block(create_block("Center, wrap"))
89 .alignment(Alignment::Center)
90 .wrap(Wrap { trim: true })
91 .scroll((scroll, 0));
92 f.render_widget(paragraph, chunks[2]);
93 let paragraph = Paragraph::new(text)
94 .style(Style::default().bg(Color::White).fg(Color::Black))
95 .block(create_block("Right, wrap"))
96 .alignment(Alignment::Right)
97 .wrap(Wrap { trim: true });
98 f.render_widget(paragraph, chunks[3]);
99 })?;
100
101 scroll += 1;
102 scroll %= 10;
103
104 if let Event::Input(key) = events.next()? {
105 if key == Key::Char('q') {
106 break;
107 }
108 }
109 }
110 Ok(())
111 }
112