initial commit

main
nick 2024-10-02 09:52:53 -04:00
parent 91f81b7ab9
commit 0ee44327f3
5 changed files with 864 additions and 0 deletions

1
.gitignore vendored Normal file
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/target

431
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21
Cargo.toml Normal file
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[package]
name = "dirbuilder"
version = "0.1.0"
edition = "2021"
[dependencies]
crossterm = "0.28.1"
tui = "0.19.0"
[lints.clippy]
enum_glob_use = 'deny'
pedantic = 'deny'
nursery = 'deny'
unwrap_used = 'deny'
[profile.release]
opt-level = 'z' # size optimisation
lto = true # link time optimisation
codegen-units = 1 # fewer -> more optimisation
panic = 'abort' # abort on panic to avoid runtime
strip = 'symbols' # strip symbols, comment out if using perf

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src/main.rs Normal file
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// mod directory;
// mod pane;
mod state;
use crossterm::cursor::Show;
use state::State;
use std::io::{self, Error};
use std::ops::{Deref, DerefMut};
use tui::backend::CrosstermBackend;
use tui::layout::Rect;
use tui::style::{Color, Style};
use tui::widgets::{Block, Borders, List, ListItem, Paragraph};
use tui::Terminal;
use crossterm::{
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
fn main() -> Result<(), Error> {
let mut terminal = MyTerminal::enter()?;
let size = terminal.size()?;
let mut dir = State::new("root".into());
loop {
let (diagramme, bottom_buf) = dir.display();
let bottom_height = u16::try_from(bottom_buf.lines().count())
.expect("too many lines to display");
let rows = diagramme
.lines()
.take((size.height - bottom_height) as usize)
.enumerate()
.map(|(i, s)| {
let row = ListItem::new(s);
if i == dir.selection() {
row.style(Style::default().fg(Color::Black).bg(if dir.is_editing() { Color::Rgb(197, 110, 31) } else { Color::White }))
} else {
row
}
})
.collect();
let widget = table_vector(rows);
let top_pane = Rect {
height: size.height - bottom_height-2,
..size
};
let bottom_pane = Rect {
y: top_pane.y + top_pane.height,
height: bottom_height+2,
..top_pane
};
let bottom_widget = Paragraph::new(bottom_buf)
.block(Block::default().title("Output").borders(Borders::all()));
terminal.draw(
|f| {
f.render_widget(widget, top_pane);
f.render_widget(bottom_widget, bottom_pane);
}
)?;
dir.set_cursor(&mut terminal)?;
let keep_going = dir.update()?;
if !keep_going { break }
}
Ok(())
}
fn table_vector(rows: Vec<ListItem<'_>>) -> List<'_> {
List::new(rows)
// You can set the style of the entire Table.
.style(Style::default().fg(Color::White))
// As any other widget, a Table can be wrapped in a Block.
.block(Block::default().title("Dirbuilder").borders(Borders::all()))
}
struct MyTerminal(Terminal<CrosstermBackend<io::Stdout>>);
impl MyTerminal {
/// Create and initialise a `Terminal`
fn enter() -> Result<Self, io::Error> {
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, Show)?;
let backend = CrosstermBackend::new(stdout);
let terminal = Terminal::new(backend)?;
Ok(Self(terminal))
}
}
impl Drop for MyTerminal {
fn drop(&mut self) {
let _ = disable_raw_mode();
let _ = execute!(
self.0.backend_mut(),
LeaveAlternateScreen
);
let _ = self.0.show_cursor();
}
}
impl Deref for MyTerminal {
type Target = Terminal<CrosstermBackend<io::Stdout>>;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl DerefMut for MyTerminal {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.0
}
}

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src/state.rs Normal file
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use std::{io::Error, process::Command};
use crossterm::event::{read, Event, KeyCode, KeyEvent};
#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
enum Mode {
#[default]
Default,
ChangingName,
GettingCommand,
}
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
pub struct State {
dirs: Vec<Directory>,
selection: u16,
mode: Mode,
cmd_buf: String,
cmd_out: String,
}
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
pub struct Directory {
name: String,
depth: u8,
expanded: bool,
is_file: bool,
}
impl State {
pub fn new(root: String) -> Self {
Self {
dirs: vec![Directory::new(root, 0, false)],
selection: 0,
mode: Mode::Default,
cmd_buf: String::new(),
cmd_out: String::new(),
}
}
pub fn select_prev(&mut self) {
if self.selection > 0 {
self.selection -= 1;
}
}
pub fn select_next(&mut self) {
if self.selection()+1 < self.dirs.len() {
self.selection += 1;
}
}
pub fn insert(&mut self, name: String, is_file: bool) {
let current_depth = self.selected().depth;
let depth = if self.selected().is_file {
current_depth
} else {
current_depth + 1
};
let new = Directory::new(name, depth, is_file);
let index = self.selection()+1;
self.dirs.insert(index, new);
}
pub fn display(&self) -> (String, &str) {
let mut iter = self.dirs.iter().enumerate();
let Some((_, init)) = iter.by_ref()
.next()
else { return (String::new(), "") };
let mut indent_parts = Vec::new();
let mut result = init.name.clone() + "/\n";
for (i, current) in iter {
// first, determine if there is another item at this depth.
// that decides what art we use
let is_last_at_this_depth = is_last_at_this_depth(&self.dirs[i+1..], current.depth);
let (new_part, continue_part) = if is_last_at_this_depth {
(TreePart::Last, TreePart::Blank)
} else {
(TreePart::First, TreePart::Wait)
};
// setting indent_parts is important.
// indent_parts[i] is the indent for depth i,
// and it needs to be set to what we decided the `continue_part`
// needs to be.
// The if branch is for when we exceed the current depth and must
// add a new indent part. the else branch is when we already
// defined a branch at this point, and we do need to update it
// every time
// TODO: figure out why
if current.depth as usize > indent_parts.len() {
indent_parts.push(continue_part);
} else {
indent_parts[current.depth as usize-1] = continue_part;
}
// I have inlined this to avoid making extra strings
// because I believe it is less efficient
indent_parts[0 .. current.depth as usize - 1]
.iter()
.copied()
.map(TreePart::display)
.for_each(|s| result += s);
result.push_str(new_part.display());
result.push_str(&current.name);
if !current.is_file {
result.push('/');
}
result.push('\n');
}
(result, &self.cmd_out)
}
fn selected(&self) -> &Directory {
&self.dirs[self.selection()]
}
fn selected_mut(&mut self) -> &mut Directory {
let idx = self.selection();
&mut self.dirs[idx]
}
pub const fn selection(&self) -> usize {
self.selection as usize
}
pub const fn is_editing(&self) -> bool {
matches!(self.mode, Mode::ChangingName)
}
pub fn set_cursor(&self, terminal: &mut super::MyTerminal) -> Result<(), Error> {
match self.mode {
Mode::Default => terminal.hide_cursor(),
Mode::ChangingName => {
terminal.show_cursor()?;
let x =
u16::from(self.selected().depth) * 4
+ u16::try_from(self.selected().name.len())
.expect("name too long to display")
+ 1;
let y = self.selection + 1;
terminal.set_cursor(x, y)
}
Mode::GettingCommand => {
terminal.show_cursor()?;
terminal.set_cursor(0, 0)
}
}
}
pub fn update(&mut self) -> Result<bool, Error> {
let Event::Key(KeyEvent { code, .. }) = read()? else {
return Ok(true);
};
match &mut self.mode {
Mode::Default => Ok(self.main_event(code)),
Mode::ChangingName => Ok(self.update_buffer(code)),
Mode::GettingCommand => self.update_command(code),
}
}
pub fn main_event(&mut self, key: KeyCode) -> bool {
match key {
KeyCode::Char(c) => {
match c {
'f' | 'F' => {
self.insert(String::new(), true);
self.select_next();
self.mode = Mode::ChangingName;
},
'd' | 'D' => {
self.insert(String::new(), false);
self.select_next();
self.mode = Mode::ChangingName;
},
'x' | 'X' => {
self.mode = Mode::GettingCommand;
}
_ => (),
};
},
KeyCode::Up => self.select_prev(),
KeyCode::Down => self.select_next(),
KeyCode::Enter => {
self.mode = Mode::ChangingName;
},
KeyCode::Esc => return false,
KeyCode::Backspace => {
if self.selected().is_file {
let index = self.selection();
self.dirs.remove(index);
if self.selection() == self.dirs.len() {
self.selection -= 1;
}
}
}
_ => (),
}
true
}
fn update_buffer(&mut self, key: KeyCode) -> bool {
match key {
KeyCode::Char(c) => self.selected_mut().name.push(c),
KeyCode::Enter | KeyCode::Esc if !self.selected().name.is_empty() => {
self.mode = Mode::Default;
},
KeyCode::Backspace => { self.selected_mut().name.pop(); },
_ => (),
}
true
}
fn update_command(&mut self, key: KeyCode) -> Result<bool, Error> {
match key {
KeyCode::Char(c) => self.cmd_buf.push(c),
KeyCode::Backspace => { self.cmd_buf.pop(); },
KeyCode::Enter => {
let mut args = self.cmd_buf.split(' ');
let Some(program) = args.next()
else { return Ok(true) };
let out = Command::new(program)
.args(args)
.arg(self.selected().name.as_str())
.output()?
.stdout;
self.cmd_out = unsafe { String::from_utf8_unchecked(out) };
self.mode = Mode::Default;
}
_ => (),
}
Ok(true)
}
}
fn is_last_at_this_depth(slice: &[Directory], target_depth: u8) -> bool {
for d in slice {
if d.depth < target_depth { return true }
if d.depth == target_depth { return false }
}
true
}
impl Directory {
pub const fn new(name: String, depth: u8, is_file: bool) -> Self {
Self {
name,
depth,
expanded: true,
is_file,
}
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
pub enum TreePart {
/// `├──`
First,
/// `│ `
Wait,
/// `└──`
Last,
/// (blank)
Blank
}
impl TreePart {
/// convert to ascii art
pub const fn display(self) -> &'static str {
match self {
Self::First => "├── ",
Self::Wait => "",
Self::Last => "└── ",
Self::Blank => " ",
}
}
}