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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,
path::{Path, PathBuf},
thread::sleep,
time::{Duration, Instant},
};
use tui::{
backend::{Backend, CrosstermBackend},
layout::{Alignment, Constraint, Corner, Direction, Layout, Rect},
style::{Color, Modifier, Style},
text::{Span, Spans},
widgets::{Block, Borders, List, ListItem, ListState, Paragraph},
Frame, Terminal,
};
use crate::generation::*;
pub struct StatefulList<T> {
state: ListState,
items: Vec<T>,
}
impl<T> StatefulList<T> {
fn with_items(items: Vec<T>) -> StatefulList<T> {
StatefulList {
state: ListState::default(),
items,
}
}
fn next(&mut self) {
let i = match self.state.selected() {
Some(i) => {
if i >= self.items.len() - 1 {
0
} else {
i + 1
}
}
None => 0,
};
self.state.select(Some(i));
}
fn previous(&mut self) {
let i = match self.state.selected() {
Some(i) => {
if i == 0 {
self.items.len() - 1
} else {
i - 1
}
}
None => 0,
};
self.state.select(Some(i));
}
fn unselect(&mut self) {
self.state.select(None);
}
}
/// This struct holds the current state of the app. In particular, it has the `items` field which is a wrapper
/// around `ListState`. Keeping track of the items state let us render the associated widget with its state
/// and have access to features such as natural scrolling.
///
/// Check the event handling at the bottom to see how to change the state on incoming events.
/// Check the drawing logic for items on how to specify the highlighting style for selected items.
pub struct App {
pub items: StatefulList<(String, PathBuf)>,
pub flag_cur: bool,
pub layout: Layout,
pub cur_gen: Gen,
}
impl App {
pub fn new() -> App {
let mut v = vec![];
for i in 1..=513 {
let name = format!("pattern{}", i);
let p = format!("./presets/patterns/pattern{}.txt", i);
v.push((name.to_owned(), Path::new(p.as_str()).to_owned()));
}
App {
items: StatefulList::with_items(v),
flag_cur: false,
layout: Layout::default()
.direction(Direction::Horizontal)
.constraints([Constraint::Percentage(15), Constraint::Percentage(85)].as_ref()),
cur_gen: Gen::new(),
}
}
}
pub fn run_app<B: Backend>(
terminal: &mut Terminal<B>,
mut app: App,
) -> io::Result<()> {
let mut last_tick = Instant::now();
let mut item_cnt = 1;
loop {
terminal.draw(|f| ui_list(f, &mut app))?;
let timeout = Duration::from_millis(32);
if crossterm::event::poll(timeout)? {
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('q') => return Ok(()),
KeyCode::Left | KeyCode::Char('h') => app.items.unselect(),
KeyCode::Down | KeyCode::Char('j') => {
if item_cnt >= app.items.items.len() - 1 {
item_cnt = 0;
} else {
item_cnt += 1;
}
app.items.next();
app.cur_gen =
gen_from_file(&app.items.items[item_cnt].1);
}
KeyCode::Up | KeyCode::Char('k') => {
if item_cnt == 0 {
item_cnt = app.items.items.len() - 1;
}
else {
item_cnt -= 1;
}
app.items.previous();
app.cur_gen =
gen_from_file(&app.items.items[item_cnt].1);
}
KeyCode::Char('n') => {
terminal.draw(|f| ui_game(f, &mut app))?;
}
KeyCode::Char('a') => 'animate: loop {
terminal.draw(|f| ui_game(f, &mut app))?;
sleep(Duration::from_millis(32));
if (crossterm::event::poll(Duration::from_millis(1))).unwrap() {
if let Event::Key(k) = event::read().unwrap() {
match k.code {
KeyCode::Char('s') => break 'animate,
_ => {}
}
}
}
},
_ => {}
}
}
}
}
}
fn ui_list<B: Backend>(f: &mut Frame<B>, app: &mut App) {
let chunks = app.layout.split(f.size());
let items: Vec<ListItem> = app
.items
.items
.iter()
.map(|i| {
let lines = vec![Spans::from(i.0.as_str())];
ListItem::new(lines).style(Style::default().fg(Color::Red).bg(Color::Black))
})
.collect();
let items = List::new(items)
.block(Block::default().borders(Borders::ALL).title("Cool Paterns"))
.highlight_style(
Style::default()
.bg(Color::White)
.add_modifier(Modifier::ITALIC),
)
.highlight_symbol("-> ");
f.render_stateful_widget(items, chunks[0], &mut app.items.state);
if !app.flag_cur {
app.cur_gen = new_gen(&chunks[1], app);
}
let spans = gen_to_spans(&app.cur_gen);
render_gen(f, chunks[1], &spans);
}
fn ui_game<B: Backend>(f: &mut Frame<B>, app: &mut App) {
let chunks = app.layout.split(f.size());
let items: Vec<ListItem> = app
.items
.items
.iter()
.map(|i| {
let lines = vec![Spans::from(i.0.as_str())];
ListItem::new(lines).style(Style::default().fg(Color::Red).bg(Color::Black))
})
.collect();
// Create a List from all list items and highlight the currently selected one
let items = List::new(items)
.block(Block::default().borders(Borders::ALL).title("Cool Patterns"))
.highlight_style(
Style::default()
.bg(Color::Blue)
.add_modifier(Modifier::BOLD),
)
.highlight_symbol("> ");
f.render_stateful_widget(items, chunks[0], &mut app.items.state);
let nxt = next_gen(app);
let spans = gen_to_spans(&nxt);
render_gen(f, chunks[1], &spans)
}
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