Struct DirectoryNavigationProvider 

pub struct DirectoryNavigationProvider;

Implementations

impl DirectoryNavigationProvider

fn guess_bar_size(dirs: &BTreeSet<PathBuf>) -> usize

Trait Implementations

impl Clone for DirectoryNavigationProvider

fn clone(&self) -> DirectoryNavigationProvider

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DirectoryNavigationProvider

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for DirectoryNavigationProvider

fn default() -> DirectoryNavigationProvider

Returns the “default value” for a type.

impl NavigationProvider for DirectoryNavigationProvider

fn leaf_for_bar_traversal( &self, selected: &Self::LevelKey, context: &Context, ) -> Self::LevelKey

Determines the appropriate directory level for navigation bar traversal.

If the selected directory has no subdirectories and is not the library home, returns the parent directory to ensure the navigation bar displays a level with navigable content. Otherwise, returns the selected directory itself.

Arguments

• selected - The currently selected directory path
• context - Application context containing library information

Returns

The directory path to use for bar traversal navigation

type LevelKey = PathBuf

Key that identifies a level in the stack.

type LevelData = BTreeSet<PathBuf>

Data needed to render a level.

type Bar = DirectoriesBar

Concrete view used to render a level.

fn selected_leaf_key(&self, selected: &Self::LevelKey) -> Self::LevelKey

Returns the key to consider “selected”.

fn parent(&self, current: &Self::LevelKey) -> Option<Self::LevelKey>

Returns the parent key, if any.

fn is_ancestor( &self, ancestor: &Self::LevelKey, descendant: &Self::LevelKey, ) -> bool

Returns true if ancestor is an ancestor of descendant.

fn is_root(&self, key: &Self::LevelKey, context: &Context) -> bool

Returns true if the key is the root of the stack.

fn fetch_level_data( &self, key: &Self::LevelKey, context: &mut Context, ) -> Self::LevelData

Fetch the data for a level.

fn estimate_line_count( &self, _key: &Self::LevelKey, data: &Self::LevelData, ) -> usize

Estimates how many visual lines (rows) the bar will need to display its content.

fn create_bar(&self, rect: Rectangle, key: &Self::LevelKey) -> Self::Bar

Creates a new empty bar for the given level key.

fn bar_key(&self, bar: &Self::Bar) -> Self::LevelKey

Returns the key that is currently displayed by a bar.

fn update_bar( &self, bar: &mut Self::Bar, data: &Self::LevelData, selected: &Self::LevelKey, fonts: &mut Fonts, )

Update bar content using only fonts (no context borrowing).

fn update_bar_selection(&self, bar: &mut Self::Bar, selected: &Self::LevelKey)

Update bar selection when the content is unchanged.

fn resize_bar_by( &self, bar: &mut Self::Bar, delta_y: i32, fonts: &mut Fonts, ) -> i32

Apply a vertical resize delta to a bar.

fn shift_bar(&self, bar: &mut Self::Bar, delta: Point)

Shift a bar by a delta.

impl Copy for DirectoryNavigationProvider