Struct UndoState 

pub struct UndoState {
    pub history: Vec<UndoEntry>,
    pub current: usize,
    pub limit: usize,
    pub recording: bool,
    pub merge_inserts: bool,
}

Undo state

Fields

history: Vec<UndoEntry>

Undo history

current: usize

Current position in undo history

limit: usize

Undo limit (where to stop)

recording: bool

Whether changes are being recorded

merge_inserts: bool

Merge sequential inserts

Implementations

impl UndoState

pub fn new() -> Self

pub fn init(&mut self)

Initialize undo system Port of initundo() from zle_utils.c

pub fn free(&mut self)

Free undo history Port of freeundo() from zle_utils.c

pub fn make_entry( &mut self, start: usize, end: usize, text: ZleString, cursor: usize, )

Create an undo entry Port of mkundoent() from zle_utils.c

pub fn split(&mut self)

Split undo (start a new undo group) Port of splitundo() from zle_utils.c

pub fn merge(&mut self)

Merge with previous undo entry Port of mergeundo() from zle_utils.c

pub fn get_current(&self) -> Option<&UndoEntry>

Get current change Port of get_undo_current_change() from zle_utils.c

pub fn set_limit(&mut self)

Set undo limit Port of set_undo_limit_change() from zle_utils.c

pub fn get_limit(&self) -> usize

Get undo limit Port of get_undo_limit_change() from zle_utils.c

Trait Implementations

impl Debug for UndoState

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

Formats the value using the given formatter.

impl Default for UndoState

fn default() -> UndoState

Returns the “default value” for a type.