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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, Style},
widgets::{Block, Borders, Paragraph},
Frame, Terminal,
};
use unicode_width::UnicodeWidthStr;
enum InputMode {
Normal,
Insert,
}
enum Row {
Rpm(String),
Ve(String),
Map(String),
}
impl Row {
fn push(&mut self, c: char) {
match self {
Row::Rpm(rpm) => {
rpm.push(c);
*self = Row::Rpm(rpm.to_string());
}
Row::Ve(ve) => {
ve.push(c);
*self = Row::Ve(ve.to_string());
}
Row::Map(map) => {
map.push(c);
*self = Row::Map(map.to_string());
}
}
}
fn pop(&mut self) {
match self {
Row::Rpm(rpm) => {
rpm.pop();
*self = Row::Rpm(rpm.to_string());
}
Row::Ve(ve) => {
ve.pop();
*self = Row::Rpm(ve.to_string());
}
Row::Map(map) => {
map.pop();
*self = Row::Map(map.to_string());
}
}
}
fn string(&self) -> String {
match self {
Row::Rpm(rpm) => rpm.to_string(),
Row::Ve(ve) => ve.to_string(),
Row::Map(map) => map.to_string(),
}
}
fn next(&self) -> Self {
match self {
Row::Rpm(_) => Row::Ve(String::new()),
Row::Ve(_) => Row::Map(String::new()),
Row::Map(_) => Row::Rpm(String::new()),
}
}
fn previous(&self) -> Self {
match self {
Row::Rpm(_) => Row::Map(String::new()),
Row::Ve(_) => Row::Rpm(String::new()),
Row::Map(_) => Row::Ve(String::new()),
}
}
}
struct Column {
rpm: Row,
ve: Row,
map: Row,
}
/// App holds the state of the application
struct App {
column: Column,
selected_row: Row,
input_mode: InputMode,
}
impl Default for App {
fn default() -> App {
App {
column: Column {
rpm: Row::Rpm(String::from("7000")),
ve: Row::Ve(String::from("95")),
map: Row::Map(String::from("150")),
},
selected_row: Row::Rpm(String::new()),
input_mode: InputMode::Normal,
}
}
}
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(())
}
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.input_mode {
InputMode::Normal => match key.code {
KeyCode::Char('i') => {
app.input_mode = InputMode::Insert;
}
KeyCode::Char('q') => {
return Ok(());
}
KeyCode::Char('j') => {
app.selected_row = app.selected_row.next();
}
KeyCode::Char('k') => {
app.selected_row = app.selected_row.previous();
}
_ => {}
},
InputMode::Insert => match key.code {
KeyCode::Enter => {
app.input_mode = InputMode::Normal;
}
KeyCode::Char(c) => match app.selected_row {
Row::Rpm(_) => {
app.column.rpm.push(c);
}
Row::Ve(_) => {
app.column.ve.push(c);
}
Row::Map(_) => {
app.column.map.push(c);
}
},
KeyCode::Backspace => match app.selected_row {
Row::Rpm(_) => {
app.column.rpm.pop();
}
Row::Ve(_) => {
app.column.ve.pop();
}
Row::Map(_) => {
app.column.map.pop();
}
},
KeyCode::Esc => {
app.input_mode = InputMode::Normal;
}
_ => {}
},
}
}
}
}
fn ui<B: Backend>(f: &mut Frame<B>, app: &App) {
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(2)
.constraints([Constraint::Length(3), Constraint::Length(3), Constraint::Length(3)].as_ref())
.split(f.size());
let rpm = Paragraph::new(app.column.rpm.string())
.style(match app.selected_row {
Row::Rpm(_) => Style::default().fg(Color::Yellow),
_ => Style::default(),
})
.block(Block::default().borders(Borders::ALL).title("rpm"));
f.render_widget(rpm, chunks[0]);
let ve = Paragraph::new(app.column.ve.string())
.style(match app.selected_row {
Row::Ve(_) => Style::default().fg(Color::Yellow),
_ => Style::default(),
})
.block(Block::default().borders(Borders::ALL).title("ve"));
f.render_widget(ve, chunks[1]);
let map = Paragraph::new(app.column.map.string())
.style(match app.selected_row {
Row::Map(_) => Style::default().fg(Color::Yellow),
_ => Style::default(),
})
.block(Block::default().borders(Borders::ALL).title("map"));
f.render_widget(map, chunks[2]);
}
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