Struct UndoStack 

pub struct UndoStack { /* private fields */ }

Implementations

impl UndoStack

pub fn new() -> Self

pub fn push(&mut self, snapshot: BufferSnapshot)

Record the state before a mutating edit. Consecutive pushes diff into a delta; identical states are discarded (no more wasted i+Esc slots).

pub fn undo(&mut self, current: BufferSnapshot) -> Option<BufferSnapshot>

Undo: absorb any uncommitted edit, then walk one delta back.

pub fn redo(&mut self, current: BufferSnapshot) -> Option<BufferSnapshot>

Redo the most recently undone delta.

pub fn can_undo(&self) -> bool

pub fn can_redo(&self) -> bool

pub fn attach_file(&mut self, path: &Path, caching: bool, text: &str)

Bind this stack to a file (spill target). Optionally resume a cached history when the on-disk content hash still matches text.

pub fn finish(&mut self, caching: bool, text: &str)

File is closing: persist the whole history (undo_caching = true) or remove the session spill (false).

Trait Implementations

impl Clone for UndoStack

fn clone(&self) -> UndoStack

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for UndoStack

fn default() -> UndoStack

Returns the “default value” for a type.