Struct DiffSignMap 

pub struct DiffSignMap { /* private fields */ }

Sparse per-line classification of the current-side rope.

Keyed by source line index (0-based, into the current rope — i.e., the line the user is looking at). Sparse because most lines have no sign. entries is sorted by line so renderer-side lookup (per-row) is O(log n) via binary search.

Build via compute_diff_sign_map — pure function of an Arc<HunkIndex>. Published per-session via DiffSession::sign_map_cell (D.3.d.0); the DiffOverlayRefreshTask refreshes it on every hunk publish so renderers see consistent decorations.

Implementations

impl DiffSignMap

pub fn entries(&self) -> &[(u32, DiffSignKind)]

pub fn revision(&self) -> u64

pub fn is_empty(&self) -> bool

pub fn len(&self) -> usize

pub fn from_entries(entries: Vec<(u32, DiffSignKind)>) -> Self

Build a sign map directly from (line, kind) entries (revision 0), for producers that classify lines without a HunkIndex to walk — a buffer whose content is already a unified diff (magit’s diff / revision / stash-show / commit views) knows each line’s kind by reading it, and has no baseline to diff against.

entries MUST be sorted ascending by line: Self::sign_at is a binary search, so an unsorted vec silently mis-reports signs rather than failing.

pub fn sign_at(&self, line: u32) -> Option<DiffSignKind>

Lookup the sign for line, if any. O(log n) binary search over entries. Renderer hot path.

Trait Implementations

impl Clone for DiffSignMap

fn clone(&self) -> DiffSignMap

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DiffSignMap

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

Formats the value using the given formatter.

impl Default for DiffSignMap

fn default() -> DiffSignMap

Returns the “default value” for a type.