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use crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::{error::Error, io};
use tui::{
backend::{Backend, CrosstermBackend},
layout::{Constraint, Direction, Layout},
style::{Color, Modifier, Style},
text::Spans,
widgets::{self, Block, Borders, Cell, Paragraph, Table, Tabs, Widget},
Frame, Terminal,
};
use volute::{
app::App,
input::{InputMode, InputParam},
};
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::default();
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(())
}
// Input handling
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()? {
match app.tab_index {
// Input tab
0 => match app.input_mode {
InputMode::Normal => match key.code {
KeyCode::Char('q') => {
return Ok(());
}
KeyCode::Char('L') => app.next_tab(),
KeyCode::Char('H') => app.previous_tab(),
KeyCode::Char('j') => app.next_row(),
KeyCode::Char('k') => app.previous_row(),
KeyCode::Char('l') => app.next_column(),
KeyCode::Char('h') => app.previous_column(),
KeyCode::Char('i') => {
app.input_mode = InputMode::Insert;
}
KeyCode::Char('p') => app.insert_row(),
KeyCode::Char('d') => app.remove_row(),
_ => {}
},
InputMode::Insert => match key.code {
KeyCode::Esc | KeyCode::Enter => {
app.input_mode = InputMode::Normal;
}
KeyCode::Char(c) => match app.selected_column {
InputParam::Rpm(_) => app.rows[app.selected_row].rpm.push(c),
InputParam::Ve(_) => app.rows[app.selected_row].ve.push(c),
InputParam::Map(_) => app.rows[app.selected_row].map.push(c),
},
KeyCode::Backspace => match app.selected_column {
InputParam::Rpm(_) => app.rows[app.selected_row].rpm.pop(),
InputParam::Ve(_) => app.rows[app.selected_row].ve.pop(),
InputParam::Map(_) => app.rows[app.selected_row].map.pop(),
},
_ => {}
},
},
// Config tab
1 => match key.code {
KeyCode::Char('q') => {
return Ok(());
}
KeyCode::Char('L') => app.next_tab(),
KeyCode::Char('H') => app.previous_tab(),
_ => {}
},
_ => unreachable!(),
}
}
}
}
fn ui<B: Backend>(f: &mut Frame<B>, app: &App) {
let titles = app.tab_titles.iter().map(|t| Spans::from(*t)).collect();
let tabs = Tabs::new(titles)
.block(Block::default().borders(Borders::ALL).title("Tabs"))
.select(app.tab_index)
.highlight_style(Style::default().add_modifier(Modifier::BOLD));
match app.tab_index {
// Input tab
0 => {
let layout = Layout::default()
.direction(Direction::Vertical)
.constraints(
[
Constraint::Length(3),
Constraint::Min(app.rows.len() as u16 + 2),
Constraint::Length(1),
]
.as_ref(),
)
.split(f.size());
f.render_widget(tabs, layout[0]);
f.render_widget(input_table(app), layout[1]);
f.render_widget(footer(app), layout[2]);
}
// Config tab
1 => {
let layout = Layout::default()
.direction(Direction::Vertical)
.constraints([Constraint::Length(3), Constraint::Min(3)].as_ref())
.split(f.size());
f.render_widget(tabs, layout[0]);
f.render_widget(Paragraph::new("Config tab"), layout[1]);
}
_ => unreachable!(),
}
}
fn input_table(app: &App) -> impl Widget {
// This is used so I can have named fields instead of indexing a vector of
// Cells when styling the selected input parameter.
struct VirtualRow<'a> {
rpm: Cell<'a>,
ve: Cell<'a>,
map: Cell<'a>,
}
let mut rows: Vec<VirtualRow> = app
.rows
.iter()
.map(|row| VirtualRow {
rpm: Cell::from(row.rpm.string()),
ve: Cell::from(row.ve.string()),
map: Cell::from(row.map.string()),
})
.collect();
// Highlight the selected parameter
let selected_parameter = match app.selected_column {
InputParam::Rpm(_) => &mut rows[app.selected_row].rpm,
InputParam::Ve(_) => &mut rows[app.selected_row].ve,
InputParam::Map(_) => &mut rows[app.selected_row].map,
};
*selected_parameter = selected_parameter.clone().style(match app.input_mode {
InputMode::Normal => Style::default().fg(Color::Yellow),
InputMode::Insert => Style::default()
.fg(Color::Yellow)
.add_modifier(Modifier::ITALIC),
});
Table::new(
rows.iter()
.map(|row| widgets::Row::new(vec![row.rpm.clone(), row.ve.clone(), row.map.clone()]))
.collect::<Vec<widgets::Row>>(),
)
.header(widgets::Row::new(vec!["rpm", "ve", "map"]))
.block(Block::default().borders(Borders::ALL).title("inputs"))
.widths(&[
Constraint::Length(5),
Constraint::Length(3),
Constraint::Length(3),
])
}
fn footer(app: &App) -> impl Widget {
match app.input_mode {
InputMode::Normal => {
Paragraph::new("Normal").style(Style::default().fg(Color::Black).bg(Color::Yellow))
}
InputMode::Insert => {
Paragraph::new("Insert").style(Style::default().fg(Color::Black).bg(Color::Blue))
}
}
}
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