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|
use crate::interactive::{
sorted_entries,
widgets::{MainWindow, MainWindowProps},
ByteVisualization, CursorDirection, DisplayOptions, EntryDataBundle, SortMode,
};
use dua::{
traverse::{Traversal, TreeIndex},
WalkOptions, WalkResult,
};
use failure::Error;
use std::{
collections::BTreeMap,
io,
path::PathBuf,
io::Write
};
use termion::event::Key;
use tui::backend::Backend;
use tui_react::Terminal;
#[derive(Copy, Clone)]
pub enum FocussedPane {
Main,
Help,
Mark,
}
impl Default for FocussedPane {
fn default() -> Self {
FocussedPane::Main
}
}
#[derive(Default)]
pub struct AppState {
pub root: TreeIndex,
pub selected: Option<TreeIndex>,
pub entries: Vec<EntryDataBundle>,
pub sorting: SortMode,
pub message: Option<String>,
pub focussed: FocussedPane,
pub bookmarks: BTreeMap<TreeIndex, TreeIndex>,
}
/// State and methods representing the interactive disk usage analyser for the terminal
pub struct TerminalApp {
pub traversal: Traversal,
pub display: DisplayOptions,
pub state: AppState,
pub window: MainWindow,
}
impl TerminalApp {
pub fn draw_window<B>(
window: &mut MainWindow,
props: MainWindowProps,
terminal: &mut Terminal<B>,
) -> Result<(), Error>
where
B: Backend,
{
let area = terminal.pre_render()?;
window.render(props, area, terminal.current_buffer_mut());
terminal.post_render()?;
Ok(())
}
pub fn draw<B>(&mut self, terminal: &mut Terminal<B>) -> Result<(), Error>
where
B: Backend,
{
let props = MainWindowProps {
traversal: &self.traversal,
display: self.display,
state: &self.state,
};
Self::draw_window(&mut self.window, props, terminal)
}
pub fn process_events<B>(
&mut self,
mut terminal: Terminal<B>,
keys: impl Iterator<Item = Result<Key, io::Error>>,
) -> Result<WalkResult, Error>
where
B: Backend,
{
use termion::event::Key::*;
use FocussedPane::*;
self.draw(&mut terminal)?;
for key in keys.filter_map(Result::ok) {
self.update_message();
match key {
Char('?') => self.toggle_help_pane(),
Char('\t') => {
self.cycle_focus();
}
Ctrl('c') => break,
Char('q') | Esc => match self.state.focussed {
Main => {
drop(terminal);
io::stdout().flush().ok();
// Exit 'quickly' to avoid having to wait for all memory to be freed by us.
// Let the OS do it - we have nothing to lose, literally.
std::process::exit(0);
},
Mark => self.state.focussed = Main,
Help => {
self.state.focussed = Main;
self.window.help_pane = None
}
},
_ => {}
}
match self.state.focussed {
FocussedPane::Mark => self.dispatch_to_mark_pane(key, &mut terminal),
FocussedPane::Help => {
self.window.help_pane.as_mut().expect("help pane").key(key);
}
FocussedPane::Main => match key {
Char('O') => self.open_that(),
Char(' ') => self.mark_entry(false),
Char('d') => self.mark_entry(true),
Char('u') | Char('h') | Backspace | Left => self.exit_node(),
Char('o') | Char('l') | Char('\n') | Right => self.enter_node(),
Ctrl('u') | PageUp => self.change_entry_selection(CursorDirection::PageUp),
Char('k') | Up => self.change_entry_selection(CursorDirection::Up),
Char('j') | Down => self.change_entry_selection(CursorDirection::Down),
Ctrl('d') | PageDown => self.change_entry_selection(CursorDirection::PageDown),
Char('s') => self.cycle_sorting(),
Char('g') => self.display.byte_vis.cycle(),
_ => {}
},
};
self.draw(&mut terminal)?;
}
Ok(WalkResult {
num_errors: self.traversal.io_errors,
})
}
pub fn initialize<B>(
terminal: &mut Terminal<B>,
options: WalkOptions,
input: Vec<PathBuf>,
) -> Result<TerminalApp, Error>
where
B: Backend,
{
terminal.hide_cursor()?;
terminal.clear()?;
let mut display_options: DisplayOptions = options.clone().into();
display_options.byte_vis = ByteVisualization::Bar;
let mut window = MainWindow::default();
let traversal = Traversal::from_walk(options, input, move |traversal| {
let state = AppState {
root: traversal.root_index,
sorting: Default::default(),
message: Some("-> scanning <-".into()),
entries: sorted_entries(&traversal.tree, traversal.root_index, Default::default()),
..Default::default()
};
let props = MainWindowProps {
traversal,
display: display_options,
state: &state,
};
Self::draw_window(&mut window, props, terminal)
})?;
let sorting = Default::default();
let root = traversal.root_index;
let entries = sorted_entries(&traversal.tree, root, sorting);
let selected = entries.get(0).map(|b| b.index);
display_options.byte_vis = ByteVisualization::PercentageAndBar;
Ok(TerminalApp {
state: AppState {
root,
sorting,
selected,
entries,
..Default::default()
},
display: display_options,
traversal,
window: Default::default(),
})
}
}
|
