Struct UndoBuffer

pub struct UndoBuffer { /* private fields */ }

Fixed size buffer with an original state and a writeable buffer. Tracks which region of the buffer has been exposed for changes and enables an undo of those changes.

Implementations

impl UndoBuffer

pub fn new(buf: &[u8]) -> Self

pub fn len(&self) -> usize

Used length of the writable buffer

pub fn is_empty(&self) -> bool

Whether the writable buffer is empty

pub fn get_mut(&mut self) -> &mut [u8]

Returns a full mutable slice of the write buffer, and marks the entire thing as dirty.

pub fn get_mut_range(&mut self, start: usize, end: usize) -> &mut [u8]

Returns a mutable subslice of the buffer. Marks that region as dirty for future undo operations.

pub fn read(&self) -> &[u8]

Returns an immutable reference to the buffer in its current state

pub fn undo(&mut self)

Undo all changes and set the write/readable buffer back to the original state

Trait Implementations

impl Clone for UndoBuffer

fn clone(&self) -> UndoBuffer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UndoBuffer

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

Formats the value using the given formatter.