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|
use anyhow::Result;
use crossterm::{
event::{self, Event, KeyCode, KeyEventKind},
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
ExecutableCommand,
};
use ratatui::{
backend::CrosstermBackend,
layout::{Constraint, Rect},
style::{Style, Stylize},
text::Span,
widgets::{Block, Borders, HighlightSpacing, Row, Table, TableState},
Frame, Terminal,
};
use std::io;
use crate::{exercise::Exercise, state_file::StateFile};
struct UiState<'a> {
pub table: Table<'a>,
selected: usize,
table_state: TableState,
last_ind: usize,
}
impl<'a> UiState<'a> {
pub fn rows<'s, 'i>(
state_file: &'s StateFile,
exercises: &'a [Exercise],
) -> impl Iterator<Item = Row<'a>> + 'i
where
's: 'i,
'a: 'i,
{
exercises
.iter()
.zip(state_file.progress())
.enumerate()
.map(|(ind, (exercise, done))| {
let next = if ind == state_file.next_exercise_ind() {
">>>>".bold().red()
} else {
Span::default()
};
let exercise_state = if *done {
"DONE".green()
} else {
"PENDING".yellow()
};
Row::new([
next,
exercise_state,
Span::raw(&exercise.name),
Span::raw(exercise.path.to_string_lossy()),
])
})
}
pub fn new(state_file: &StateFile, exercises: &'a [Exercise]) -> Self {
let header = Row::new(["Next", "State", "Name", "Path"]);
let max_name_len = exercises
.iter()
.map(|exercise| exercise.name.len())
.max()
.unwrap_or(4) as u16;
let widths = [
Constraint::Length(4),
Constraint::Length(7),
Constraint::Length(max_name_len),
Constraint::Fill(1),
];
let rows = Self::rows(state_file, exercises);
let table = Table::new(rows, widths)
.header(header)
.column_spacing(2)
.highlight_spacing(HighlightSpacing::Always)
.highlight_style(Style::new().bg(ratatui::style::Color::Rgb(50, 50, 50)))
.highlight_symbol("🦀")
.block(Block::default().borders(Borders::BOTTOM));
let selected = 0;
let table_state = TableState::default().with_selected(Some(selected));
let last_ind = exercises.len() - 1;
Self {
table,
selected,
table_state,
last_ind,
}
}
fn select(&mut self, ind: usize) {
self.selected = ind;
self.table_state.select(Some(ind));
}
pub fn select_next(&mut self) {
self.select(self.selected.saturating_add(1).min(self.last_ind));
}
pub fn select_previous(&mut self) {
self.select(self.selected.saturating_sub(1));
}
#[inline]
pub fn select_first(&mut self) {
self.select(0);
}
#[inline]
pub fn select_last(&mut self) {
self.select(self.last_ind);
}
pub fn draw(&mut self, frame: &mut Frame) {
let area = frame.size();
frame.render_stateful_widget(
&self.table,
Rect {
x: 0,
y: 0,
width: area.width,
height: area.height - 1,
},
&mut self.table_state,
);
let help_footer =
"↓/j ↑/k home/g end/G │ Filter <d>one/<p>ending │ <r>eset │ <c>ontinue at │ <q>uit";
frame.render_widget(
Span::raw(help_footer),
Rect {
x: 0,
y: area.height - 1,
width: area.width,
height: 1,
},
);
}
}
pub fn list(state_file: &mut StateFile, exercises: &[Exercise]) -> Result<()> {
let mut stdout = io::stdout().lock();
stdout.execute(EnterAlternateScreen)?;
enable_raw_mode()?;
let mut terminal = Terminal::new(CrosstermBackend::new(&mut stdout))?;
terminal.clear()?;
let mut ui_state = UiState::new(state_file, exercises);
'outer: loop {
terminal.draw(|frame| ui_state.draw(frame))?;
let key = loop {
match event::read()? {
Event::Key(key) => {
if key.kind != KeyEventKind::Press {
continue;
}
break key;
}
// Redraw
Event::Resize(_, _) => continue 'outer,
// Ignore
Event::FocusGained | Event::FocusLost | Event::Mouse(_) | Event::Paste(_) => (),
}
};
match key.code {
KeyCode::Char('q') => break,
KeyCode::Down | KeyCode::Char('j') => ui_state.select_next(),
KeyCode::Up | KeyCode::Char('k') => ui_state.select_previous(),
KeyCode::Home | KeyCode::Char('g') => ui_state.select_first(),
KeyCode::End | KeyCode::Char('G') => ui_state.select_last(),
KeyCode::Char('c') => {
state_file.set_next_exercise_ind(ui_state.selected)?;
ui_state.table = ui_state.table.rows(UiState::rows(state_file, exercises));
}
_ => (),
}
}
drop(terminal);
stdout.execute(LeaveAlternateScreen)?;
disable_raw_mode()?;
Ok(())
}
|
