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use tui::buffer::Buffer;
use tui::layout::Rect;
use tui::style::{Color, Modifier, Style};
use tui::widgets::Widget;
use unicode_width::UnicodeWidthStr;
use crate::fs::{JoshutoDirEntry, JoshutoDirList};
use crate::ui::widgets::trim_file_label;
use crate::util::style;
pub struct TuiDirList<'a> {
dirlist: &'a JoshutoDirList,
}
impl<'a> TuiDirList<'a> {
pub fn new(dirlist: &'a JoshutoDirList) -> Self {
Self { dirlist }
}
}
impl<'a> Widget for TuiDirList<'a> {
fn render(self, area: Rect, buf: &mut Buffer) {
if area.width < 1 || area.height < 1 {
return;
}
if area.width < 4 {
return;
}
let x = area.left();
let y = area.top();
if self.dirlist.contents.is_empty() {
let style = Style::default().bg(Color::Red).fg(Color::White);
buf.set_stringn(x, y, "empty", area.width as usize, style);
return;
}
let curr_index = self.dirlist.index.unwrap();
let skip_dist = curr_index / area.height as usize * area.height as usize;
let drawing_width = area.width as usize;
self.dirlist
.iter()
.skip(skip_dist)
.enumerate()
.take(area.height as usize)
.for_each(|(i, entry)| {
let style = style::entry_style(entry);
print_entry(buf, entry, style, (x + 1, y + i as u16), drawing_width - 1);
});
// draw selected entry in a different style
let screen_index = curr_index % area.height as usize;
let entry = self.dirlist.curr_entry_ref().unwrap();
let style = style::entry_style(entry).add_modifier(Modifier::REVERSED);
let space_fill = " ".repeat(drawing_width);
buf.set_string(x, y + screen_index as u16, space_fill.as_str(), style);
print_entry(
buf,
entry,
style,
(x + 1, y + screen_index as u16),
drawing_width - 1,
);
}
}
fn print_entry(
buf: &mut Buffer,
entry: &JoshutoDirEntry,
style: Style,
(x, y): (u16, u16),
drawing_width: usize,
) {
let name = entry.label();
let name_width = name.width();
let label = if name_width > drawing_width {
trim_file_label(name, drawing_width)
} else {
name.to_string()
};
buf.set_string(x, y, label, style);
}
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