Struct UndoHistory 

pub struct UndoHistory { /* private fields */ }

Ring-buffer undo/redo stack (max 200 entries).

Implementations

impl UndoHistory

pub fn new(max_size: usize) -> Self

pub fn execute(&mut self, cmd: Box<dyn EditorCommand>, state: &mut EditorState)

Execute a command and push it onto the history.

pub fn undo(&mut self, state: &mut EditorState) -> bool

Undo the last command.

pub fn redo(&mut self, state: &mut EditorState) -> bool

Redo the next undone command.

pub fn can_undo(&self) -> bool

pub fn can_redo(&self) -> bool

pub fn clear(&mut self)

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn recent_names(&self, n: usize) -> Vec<&str>

Returns the names of the last N commands (most recent first).

Trait Implementations

impl Debug for UndoHistory

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

Formats the value using the given formatter.