Struct History 

pub struct History { /* private fields */ }

Implementations

impl History

pub fn with_limit(limit: usize) -> Self

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

Record the state before an edit of kind; History::landed closes it afterwards. A run of insertions leaves one step, so undo gives back the word rather than the letter.

pub fn landed(&mut self, kind: EditKind, selection: Selection)

Close the edit, noting where it left the caret. The next edit joins this group only if it starts from exactly here.

pub fn interrupt(&mut self)

Anything that is not an edit ends the group — a motion, a click, a focus change. Without this, typing a word, clicking elsewhere and typing again would undo as one step across two places.

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.