Struct History 

pub struct History { /* private fields */ }

A document’s undo and redo stacks, shared by every editor on it.

Implementations

impl History

pub fn with_limit(limit: usize) -> Self

pub fn clear(&mut self)

Drop every step, both ways.

pub fn can_undo(&self) -> bool

Whether there is a step to take back.

pub fn record( &mut self, joins: bool, mode: Mode, doc: &Doc, selection: Selection, anchors: &[Anchor], )

Record the state before an edit. joins leaves it to the step the last edit opened — see Run::joins. Either way the redo stack goes.

pub fn undo( &mut self, mode: Mode, doc: &Doc, selection: Selection, anchors: &[Anchor], ) -> Option<Step>

Step back, handing the caller the state to restore. Pushes what it was given onto the redo stack.

pub fn redo( &mut self, mode: Mode, doc: &Doc, selection: Selection, anchors: &[Anchor], ) -> Option<Step>

Trait Implementations

impl Default for History

fn default() -> Self

Returns the “default value” for a type.