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|
use eyre::Result;
use itertools::Itertools;
use std::io::stdout;
use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
use tui::{
backend::TermionBackend,
layout::{Alignment, Constraint, Corner, Direction, Layout},
style::{Color, Modifier, Style},
text::{Span, Spans, Text},
widgets::{Block, Borders, List, ListItem, ListState, Paragraph},
Terminal,
};
use unicode_width::UnicodeWidthStr;
use crate::command::event::{Event, Events};
use crate::local::database::Database;
use crate::local::history::History;
const VERSION: &str = env!("CARGO_PKG_VERSION");
struct State {
input: String,
results: Vec<History>,
results_state: ListState,
}
fn query_results(app: &mut State, db: &mut impl Database) {
let results = match app.input.as_str() {
"" => db.list(),
i => db.prefix_search(i),
};
if let Ok(results) = results {
app.results = results.into_iter().rev().unique().collect();
}
if app.results.is_empty() {
app.results_state.select(None);
} else {
app.results_state.select(Some(0));
}
}
fn key_handler(input: Key, db: &mut impl Database, app: &mut State) -> Option<String> {
match input {
Key::Esc | Key::Char('\n') => {
let i = app.results_state.selected().unwrap_or(0);
return Some(app.results.get(i).unwrap().command.clone());
}
Key::Char(c) => {
app.input.push(c);
query_results(app, db);
}
Key::Backspace => {
app.input.pop();
query_results(app, db);
}
Key::Down => {
let i = match app.results_state.selected() {
Some(i) => {
if i == 0 {
0
} else {
i - 1
}
}
None => 0,
};
app.results_state.select(Some(i));
}
Key::Up => {
let i = match app.results_state.selected() {
Some(i) => {
if i >= app.results.len() - 1 {
app.results.len() - 1
} else {
i + 1
}
}
None => 0,
};
app.results_state.select(Some(i));
}
_ => {}
};
None
}
// this is a big blob of horrible! clean it up!
// for now, it works. But it'd be great if it were more easily readable, and
// modular. I'd like to add some more stats and stuff at some point
#[allow(clippy::clippy::cast_possible_truncation)]
fn select_history(query: &[String], db: &mut impl Database) -> Result<String> {
let stdout = stdout().into_raw_mode()?;
let stdout = MouseTerminal::from(stdout);
let stdout = AlternateScreen::from(stdout);
let backend = TermionBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
// Setup event handlers
let events = Events::new();
let mut app = State {
input: query.join(" "),
results: Vec::new(),
results_state: ListState::default(),
};
query_results(&mut app, db);
loop {
// Handle input
if let Event::Input(input) = events.next()? {
if let Some(output) = key_handler(input, db, &mut app) {
return Ok(output);
}
}
terminal.draw(|f| {
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(1)
.constraints(
[
Constraint::Length(2),
Constraint::Min(1),
Constraint::Length(3),
]
.as_ref(),
)
.split(f.size());
let top_chunks = Layout::default()
.direction(Direction::Horizontal)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
.split(chunks[0]);
let top_left_chunks = Layout::default()
.direction(Direction::Vertical)
.constraints([Constraint::Length(1), Constraint::Length(1)].as_ref())
.split(top_chunks[0]);
let top_right_chunks = Layout::default()
.direction(Direction::Vertical)
.constraints([Constraint::Length(1), Constraint::Length(1)].as_ref())
.split(top_chunks[1]);
let title = Paragraph::new(Text::from(Span::styled(
format!("A'tuin v{}", VERSION),
Style::default().add_modifier(Modifier::BOLD),
)));
let help = vec![
Span::raw("Press "),
Span::styled("Esc", Style::default().add_modifier(Modifier::BOLD)),
Span::raw(" to exit."),
];
let help = Text::from(Spans::from(help));
let help = Paragraph::new(help);
let input = Paragraph::new(app.input.as_ref())
.block(Block::default().borders(Borders::ALL).title("Search"));
let results: Vec<ListItem> = app
.results
.iter()
.enumerate()
.map(|(i, m)| {
let mut content = Span::raw(m.command.to_string());
if let Some(selected) = app.results_state.selected() {
if selected == i {
content.style =
Style::default().fg(Color::Red).add_modifier(Modifier::BOLD);
}
}
ListItem::new(content)
})
.collect();
let results = List::new(results)
.block(Block::default().borders(Borders::ALL).title("History"))
.start_corner(Corner::BottomLeft)
.highlight_symbol(">> ");
let stats = Paragraph::new(Text::from(Span::raw(format!(
"history count: {}",
db.history_count().unwrap()
))))
.alignment(Alignment::Right);
f.render_widget(title, top_left_chunks[0]);
f.render_widget(help, top_left_chunks[1]);
f.render_widget(stats, top_right_chunks[0]);
f.render_stateful_widget(results, chunks[1], &mut app.results_state);
f.render_widget(input, chunks[2]);
f.set_cursor(
// Put cursor past the end of the input text
chunks[2].x + app.input.width() as u16 + 1,
// Move one line down, from the border to the input line
chunks[2].y + 1,
);
})?;
}
}
pub fn run(query: &[String], db: &mut impl Database) -> Result<()> {
let item = select_history(query, db)?;
eprintln!("{}", item);
Ok(())
}
|
