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|
use std::{path::PathBuf, sync::Arc};
use anyhow::Result;
use crossbeam::channel::Receiver;
use crosstermion::input::Event;
use dua::{
traverse::{EntryData, Traversal, Tree},
ByteFormat, WalkOptions, WalkResult,
};
use tui::prelude::Backend;
use tui_react::Terminal;
use crate::{crossdev, interactive::widgets::MainWindow};
use super::{
app_state::{AppState, ProcessingResult, TraversalState},
sorted_entries, DisplayOptions,
};
/// 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,
pub walk_options: WalkOptions,
}
pub type TraversalEntry =
Result<jwalk::DirEntry<((), Option<Result<std::fs::Metadata, jwalk::Error>>)>, jwalk::Error>;
pub enum TraversalEvent {
Entry(TraversalEntry, Arc<PathBuf>, u64),
Finished(u64),
}
impl TerminalApp {
pub fn initialize<B>(
terminal: &mut Terminal<B>,
walk_options: WalkOptions,
byte_format: ByteFormat,
) -> Result<TerminalApp>
where
B: Backend,
{
terminal.hide_cursor()?;
terminal.clear()?;
let display = DisplayOptions::new(byte_format);
let window = MainWindow::default();
let mut state = AppState {
is_scanning: false,
..Default::default()
};
let traversal = {
let mut tree = Tree::new();
let root_index = tree.add_node(EntryData::default());
Traversal {
tree,
root_index,
entries_traversed: 0,
start: std::time::Instant::now(),
elapsed: None,
io_errors: 0,
total_bytes: None,
}
};
state.navigation_mut().view_root = traversal.root_index;
state.entries = sorted_entries(
&traversal.tree,
state.navigation().view_root,
state.sorting,
state.glob_root(),
);
state.navigation_mut().selected = state.entries.first().map(|b| b.index);
let app = TerminalApp {
state,
display,
traversal,
window,
walk_options,
};
Ok(app)
}
pub fn scan(&mut self, input: Vec<PathBuf>) -> Result<Receiver<TraversalEvent>> {
self.state.traversal_state = TraversalState::new(self.traversal.root_index);
self.state.is_scanning = true;
let (entry_tx, entry_rx) = crossbeam::channel::bounded(100);
std::thread::Builder::new()
.name("dua-fs-walk-dispatcher".to_string())
.spawn({
let walk_options = self.walk_options.clone();
let mut io_errors: u64 = 0;
move || {
for root_path in input.into_iter() {
let device_id = match crossdev::init(root_path.as_ref()) {
Ok(id) => id,
Err(_) => {
io_errors += 1;
continue;
}
};
let root_path = Arc::new(root_path);
for entry in walk_options
.iter_from_path(root_path.as_ref(), device_id)
.into_iter()
{
if entry_tx
.send(TraversalEvent::Entry(
entry,
Arc::clone(&root_path),
device_id,
))
.is_err()
{
// The channel is closed, this means the user has
// requested to quit the app. Abort the walking.
return;
}
}
}
if entry_tx.send(TraversalEvent::Finished(io_errors)).is_err() {
log::error!("Failed to send TraversalEvents::Finished event");
}
}
})?;
Ok(entry_rx)
}
pub fn process_events<B>(
&mut self,
terminal: &mut Terminal<B>,
events: Receiver<Event>,
traversal: Receiver<TraversalEvent>,
) -> Result<WalkResult>
where
B: Backend,
{
match self.state.process_events(
&mut self.window,
&mut self.traversal,
&mut self.display,
terminal,
&self.walk_options,
events,
traversal,
)? {
ProcessingResult::ExitRequested(res) => Ok(res),
}
}
}
|
