Struct UndoVec 

pub struct UndoVec { /* private fields */ }

Standard implementation for undo.

Implementations

impl UndoVec

pub fn new(undo_count: u32) -> UndoVec

New undo.

pub fn enable_undo_styles(&mut self, undo_styles: bool)

Enable undo for style changes.

Usually not what you want. Unless you allow your users to set styles manually. If your styling is done by a parser, don’t activate this.

Changes to the range of styles and removal of styles caused by text edits will be undone anyway.

Recording those operations for replay will not be affected by this setting.

pub fn undo_styles(&self) -> bool

Undo for styles are enabled.

Trait Implementations

impl Clone for UndoVec

fn clone(&self) -> UndoVec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UndoVec

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

Formats the value using the given formatter.

impl Default for UndoVec

fn default() -> UndoVec

Returns the “default value” for a type.

impl UndoBuffer for UndoVec

fn begin_seq(&mut self)

Begin a sequence of changes that should be undone at once.

fn end_seq(&mut self)

End a sequence of changes. Unbalanced end_seq calls panic.

fn undo(&mut self) -> Vec<&UndoOp>

Get next undo

fn redo(&mut self) -> Vec<&UndoOp>

Get next redo

fn enable_replay_log(&mut self, replay: bool)

Enable replay functionality.

This keeps track of all changes to a textarea. These changes can be copied to another textarea with the replay() function.

fn recent_replay_log(&mut self) -> Vec<UndoEntry>

Get all new replay entries.

fn undo_count(&self) -> u32

How many undoes are stored?

fn set_undo_count(&mut self, n: u32)

How many undoes are stored?

fn append(&mut self, undo: UndoOp)

Appends a new operation at the current undo-position.

fn append_from_replay(&mut self, undo: UndoEntry)

Appends a new operation but doesn’t fill the replay-log.

fn clear(&mut self)

Clear the undo and the replay buffer.

fn open_undo(&self) -> usize

Get the number of possible undo operations.

fn open_redo(&self) -> usize

Get the number of possible redo operations.

fn has_replay_log(&self) -> bool

Is the replay-log active?

fn undo_styles_enabled(&self) -> bool

Is there undo for setting/removing styles.