Struct UndoStack 

pub struct UndoStack { /* private fields */ }

Undo/redo stack with efficient memory management

Uses a circular buffer design with arena allocation for optimal performance. Supports configurable limits and automatic cleanup.

Implementations

impl UndoStack

pub fn new() -> Self

Create a new undo stack with default configuration

pub fn with_config(config: UndoStackConfig) -> Self

Create a new undo stack with custom configuration

pub fn push(&mut self, entry: HistoryEntry)

Push a new entry onto the undo stack

This clears the redo stack as new operations invalidate previously undone operations.

pub fn pop_undo(&mut self) -> Option<HistoryEntry>

Pop the most recent entry from the undo stack

pub fn push_redo(&mut self, entry: HistoryEntry)

Push an entry onto the redo stack

pub fn pop_redo(&mut self) -> Option<HistoryEntry>

Pop an entry from the redo stack

pub fn can_undo(&self) -> bool

Check if undo is available

pub fn can_redo(&self) -> bool

Check if redo is available

pub fn undo_count(&self) -> usize

Get the number of undo entries available

pub fn redo_count(&self) -> usize

Get the number of redo entries available

pub fn memory_usage(&self) -> usize

Get current memory usage in bytes

pub fn next_undo_description(&self) -> Option<&str>

Get description of the next undo operation

pub fn next_redo_description(&self) -> Option<&str>

Get description of the next redo operation

pub fn clear(&mut self)

Clear all history

pub fn arena(&self) -> &Bump

Available on crate feature arena only.

Get arena allocator reference

pub fn arena_mut(&mut self) -> &mut Bump

Available on crate feature arena only.

Get mutable arena allocator reference

Trait Implementations

impl Debug for UndoStack

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

Formats the value using the given formatter.

impl Default for UndoStack

fn default() -> Self

Returns the “default value” for a type.