Struct UndoManager 

pub struct UndoManager { /* private fields */ }

An undo manager for a single document.

Implementations

impl UndoManager

pub fn new( document_id: impl Into<String>, replica_id: impl Into<String>, ) -> Self

Create a new undo manager.

pub fn set_max_history(&mut self, max: usize)

Set the maximum history size.

pub fn record(&mut self, operation: UndoableOperation) -> &Operation

Record a local operation.

pub fn record_remote(&mut self, operation: Operation)

Record a remote operation (from another replica).

pub fn start_group(&mut self) -> GroupId

Start a new operation group.

pub fn end_group(&mut self)

End the current operation group.

pub fn can_undo(&self) -> bool

Check if we can undo.

pub fn can_redo(&self) -> bool

Check if we can redo.

pub fn undo(&mut self) -> Vec<UndoableOperation>

Undo the last operation (or group). Returns the inverse operations to apply.

pub fn redo(&mut self) -> Vec<UndoableOperation>

Redo the last undone operation. Returns the operations to reapply.

pub fn undo_stack_size(&self) -> usize

Get the undo stack size.

pub fn redo_stack_size(&self) -> usize

Get the redo stack size.

pub fn clear(&mut self)

Clear all history.

Trait Implementations

impl Clone for UndoManager

fn clone(&self) -> UndoManager

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UndoManager

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

Formats the value using the given formatter.