Struct UndoStack 

pub struct UndoStack { /* private fields */ }

A bounded undo/redo stack for text editing.

Stores up to max_history operations. When the limit is reached, the oldest operation is dropped. Pushing a new operation clears the redo stack.

Implementations

impl UndoStack

pub fn new(max_history: usize) -> Self

Create a new undo stack with the given maximum history size.

pub fn push(&mut self, op: EditOperation)

Push a new operation onto the undo stack.

This clears the redo stack. If the undo stack exceeds max_history, the oldest operation is dropped.

pub fn undo(&mut self) -> Option<EditOperation>

Pop the most recent operation and return its inverse for undoing.

The operation is moved to the redo stack.

pub fn redo(&mut self) -> Option<EditOperation>

Pop the most recent redo operation and return it for reapplying.

The operation is moved back to the undo stack.

pub fn can_undo(&self) -> bool

Returns true if there are operations to undo.

pub fn can_redo(&self) -> bool

Returns true if there are operations to redo.

pub fn clear(&mut self)

Clear both undo and redo stacks.

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 Debug for UndoStack

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

Formats the value using the given formatter.