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use std::collections::{BTreeSet, HashSet};
use std::path::PathBuf;
use dua::WalkOptions;
use dua::traverse::{BackgroundTraversal, TraversalStats};
use crate::interactive::widgets::Column;
use super::{EntryDataBundle, SortMode, input::TerminalFocus, navigation::Navigation};
#[derive(Default, Copy, Clone, PartialEq)]
pub enum FocussedPane {
#[default]
Main,
Help,
Mark,
Glob,
}
#[derive(Default)]
pub struct Cursor {
pub show: bool,
pub x: u16,
pub y: u16,
}
pub struct FilesystemScan {
pub active_traversal: BackgroundTraversal,
/// The selected item prior to starting the traversal, if available, based on its name or index into [`AppState::entries`].
pub previous_selection: Option<(PathBuf, usize)>,
/// Snapshot destination for the initial scan, if requested.
pub snapshot_export: Option<(PathBuf, Option<i32>)>,
}
#[expect(
clippy::struct_excessive_bools,
reason = "independent UI state flags are clearer than an artificial state machine"
)]
pub struct AppState {
/// Navigation state for the main traversal view.
pub navigation: Navigation,
/// Navigation state for an active glob-filtered view, if one is open.
pub glob_navigation: Option<Navigation>,
/// Entries currently displayed in the active view.
pub entries: Vec<EntryDataBundle>,
/// Displayed entries that match known cleanup-directory names, or `None` if disabled.
pub cleanup_candidates: Option<BTreeSet<dua::traverse::TreeIndex>>,
/// Displayed entries ignored by the current git repository, or `None` if disabled.
pub gitignored_entries: Option<BTreeSet<dua::traverse::TreeIndex>>,
/// Active ordering for `entries`.
pub sorting: SortMode,
/// Optional columns explicitly enabled by the user.
pub show_columns: HashSet<Column>,
/// Status message shown in the footer.
pub message: Option<String>,
/// Pane that currently receives keyboard input.
pub focussed: FocussedPane,
/// Focus state shared with the terminal input reader.
pub terminal_focus: TerminalFocus,
/// Whether user input or terminal events have arrived since the current scan started.
pub received_events: bool,
/// Active background filesystem traversal, if a scan or refresh is running.
pub scan: Option<FilesystemScan>,
/// Latest traversal progress and error counters.
pub stats: TraversalStats,
/// Options used when starting filesystem walks.
pub walk_options: WalkOptions,
/// The paths used in the initial traversal, at least 1.
pub root_paths: Vec<PathBuf>,
/// Filesystem directory completely represented by the traversal root, if one exists.
///
/// `Some(path)` means the root contains the complete, walk-option-filtered contents of
/// `path`; this lets an upward scan reuse the existing tree as that directory's subtree.
/// `None` means the root groups explicitly selected paths and may omit their siblings, so it
/// cannot itself be treated as a complete directory.
pub root_path: Option<PathBuf>,
/// If true, listed entries will be validated for presence when switching directories.
pub allow_entry_check: bool,
/// Whether this traversal was loaded from a snapshot and must not touch the filesystem.
pub read_only: bool,
/// Whether the next quit/back action should exit the app.
pub pending_exit: bool,
}
impl AppState {
pub fn new(
walk_options: WalkOptions,
input: Vec<PathBuf>,
root_path: Option<PathBuf>,
read_only: bool,
) -> Self {
AppState {
navigation: Navigation::default(),
glob_navigation: None,
entries: vec![],
cleanup_candidates: Some(BTreeSet::new()),
gitignored_entries: Some(BTreeSet::new()),
sorting: SortMode::default(),
show_columns: HashSet::default(),
message: None,
focussed: FocussedPane::default(),
terminal_focus: TerminalFocus::default(),
received_events: false,
scan: None,
stats: TraversalStats::default(),
walk_options,
root_paths: input,
root_path,
allow_entry_check: !read_only,
read_only,
pending_exit: false,
}
}
}