Struct UndoHistoryController 

pub struct UndoHistoryController { /* private fields */ }

A cloneable, widget-independent undo/redo controller for text editing.

Implementations

impl UndoHistoryController

pub fn new(editor: TextEditingController) -> Self

Starts tracking an existing editor without adding its initial value to history.

pub fn editor(&self) -> TextEditingController

pub fn state_signal(&self) -> Signal<UndoHistoryState>

Returns the signal used by reactive consumers to observe availability.

pub fn signal(&self) -> Signal<UndoHistoryState>

Short alias for Self::state_signal.

pub fn status(&self) -> UndoHistoryState

pub fn can_undo(&self) -> bool

pub fn can_redo(&self) -> bool

pub fn set_max_entries(&self, max_entries: usize)

Limits the number of committed text states retained by this history. A value of zero disables recording while keeping the current editor value usable. Existing entries are trimmed immediately.

pub fn max_entries(&self) -> usize

pub fn undo(&self) -> bool

Moves the editor to the previous value, if one exists.

pub fn redo(&self) -> bool

Moves the editor to the next value, if one exists.

pub fn clear(&self)

Discards undo and redo entries while retaining the current editor text.

Trait Implementations

impl Clone for UndoHistoryController

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UndoHistoryController

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

Formats the value using the given formatter.