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|
use rustyline::completion::{Candidate, Completer, FilenameCompleter, Pair};
use rustyline::line_buffer;
use termion::event::Key;
use tui::layout::Rect;
use tui::style::{Color, Modifier, Style};
use tui::text::{Span, Spans};
use tui::widgets::{Clear, Paragraph, Wrap};
use crate::context::JoshutoContext;
use crate::ui::TuiBackend;
use crate::util::event::Event;
use crate::util::worker;
use super::{TuiMenu, TuiView};
struct CompletionTracker {
pub index: usize,
pub pos: usize,
pub original: String,
pub candidates: Vec<Pair>,
}
impl CompletionTracker {
pub fn new(pos: usize, candidates: Vec<Pair>, original: String) -> Self {
CompletionTracker {
index: 0,
pos,
original,
candidates,
}
}
}
pub struct TuiTextField<'a> {
_prompt: &'a str,
_prefix: &'a str,
_suffix: &'a str,
_menu_items: Option<Vec<&'a str>>,
}
impl<'a> TuiTextField<'a> {
pub fn menu_items<I>(&mut self, items: I) -> &mut Self
where I: Iterator<Item = &'a str> {
self._menu_items = Some(items.collect());
self
}
pub fn prompt(&mut self, prompt: &'a str) -> &mut Self {
self._prompt = prompt;
self
}
pub fn prefix(&mut self, prefix: &'a str) -> &mut Self {
self._prefix = prefix;
self
}
pub fn suffix(&mut self, suffix: &'a str) -> &mut Self {
self._suffix = suffix;
self
}
pub fn get_input(
&mut self,
backend: &mut TuiBackend,
context: &mut JoshutoContext,
) -> Option<String> {
context.flush_event();
let mut line_buffer = line_buffer::LineBuffer::with_capacity(255);
let completer = FilenameCompleter::new();
let mut completion_tracker: Option<CompletionTracker> = None;
let char_idx = self._prefix.chars().map(|c| c.len_utf8()).sum();
line_buffer.insert_str(0, self._suffix);
line_buffer.insert_str(0, self._prefix);
line_buffer.set_pos(char_idx);
let terminal = backend.terminal_mut();
loop {
terminal
.draw(|frame| {
let f_size: Rect = frame.size();
if f_size.height == 0 {
return;
}
{
let mut view = TuiView::new(&context);
view.show_bottom_status = false;
frame.render_widget(view, f_size);
}
if let Some(items) = self._menu_items.as_ref() {
let menu_len = items.len();
let menu_y = if menu_len + 2 > f_size.height as usize {
0
} else {
(f_size.height as usize - menu_len - 2) as u16
};
let rect = Rect {
x: 0,
y: menu_y,
width: f_size.width,
height: menu_len as u16,
};
let menu_widget = TuiMenu::new(items);
frame.render_widget(menu_widget, rect);
}
let cursor_xpos = line_buffer.pos();
let prefix = &line_buffer.as_str()[..cursor_xpos];
let curr = line_buffer.as_str()[cursor_xpos..].chars().next();
let (suffix, curr) = match curr {
Some(c) => {
let curr_len = c.len_utf8();
(&line_buffer.as_str()[(cursor_xpos + curr_len)..], c)
}
None => ("", ' '),
};
let cmd_prompt_style = Style::default().fg(Color::LightGreen);
let cursor_style = Style::default().add_modifier(Modifier::REVERSED);
let default_style = Style::default().fg(Color::Reset).bg(Color::Reset);
let curr_string = curr.to_string();
let text = Spans::from(vec![
Span::styled(self._prompt, cmd_prompt_style),
Span::styled(prefix, default_style),
Span::styled(curr_string, cursor_style),
Span::styled(suffix, default_style),
Span::styled(" ", default_style),
Span::styled(".", Style::default().fg(Color::Black).bg(Color::Reset)),
]);
let textfield_rect = Rect {
x: 0,
y: f_size.height - 1,
width: f_size.width,
height: 1,
};
frame.render_widget(Clear, textfield_rect);
frame.render_widget(
Paragraph::new(text).wrap(Wrap { trim: true }),
textfield_rect,
);
})
.unwrap();
if let Ok(event) = context.poll_event() {
match event {
Event::IOWorkerProgress(res) => {
worker::process_worker_progress(context, res);
}
Event::IOWorkerResult(res) => {
worker::process_finished_worker(context, res);
}
Event::Input(key) => {
match key {
Key::Backspace => {
if line_buffer.backspace(1) {
completion_tracker.take();
}
}
Key::Left => {
if line_buffer.move_backward(1) {
completion_tracker.take();
}
}
Key::Right => {
if line_buffer.move_forward(1) {
completion_tracker.take();
}
}
Key::Delete => {
if line_buffer.delete(1).is_some() {
completion_tracker.take();
}
}
Key::Home => {
line_buffer.move_home();
completion_tracker.take();
}
Key::End => {
line_buffer.move_end();
completion_tracker.take();
}
Key::Up => {}
Key::Down => {}
Key::Esc => {
return None;
}
Key::Char('\t') => {
if completion_tracker.is_none() {
let res = completer
.complete_path(line_buffer.as_str(), line_buffer.pos());
if let Ok((pos, mut candidates)) = res {
candidates.sort_by(|x, y| {
x.display()
.partial_cmp(y.display())
.unwrap_or(std::cmp::Ordering::Less)
});
let ct = CompletionTracker::new(
pos,
candidates,
String::from(line_buffer.as_str()),
);
completion_tracker = Some(ct);
}
}
if let Some(ref mut s) = completion_tracker {
if s.index < s.candidates.len() {
let candidate = &s.candidates[s.index];
completer.update(
&mut line_buffer,
s.pos,
candidate.display(),
);
s.index += 1;
}
}
}
Key::Char('\n') => {
break;
}
Key::Char(c) => {
if line_buffer.insert(c, 1).is_some() {
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