Struct HistoryRing 

pub struct HistoryRing { /* private fields */ }

LIFO ring buffer for yank/delete history (numbered registers 0-255).

Example

use reovim_kernel::api::v1::*;

let mut ring = HistoryRing::new();
ring.push(RegisterContent::characterwise("first"));
ring.push(RegisterContent::characterwise("second"));

// Most recent is at index 0
assert_eq!(ring.get(0).map(|r| r.text.as_str()), Some("second"));
assert_eq!(ring.get(1).map(|r| r.text.as_str()), Some("first"));

Implementations

impl HistoryRing

pub const fn new() -> Self

Create a new history ring with default capacity (256).

pub fn with_capacity(capacity: usize) -> Self

Create a history ring with custom capacity.

pub fn push(&mut self, content: RegisterContent)

Push content to the front of the history.

The new entry becomes register 0. If the ring is full, the oldest entry (register 9) is discarded.

pub fn get(&self, index: usize) -> Option<&RegisterContent>

Get an entry by index (0 = most recent).

pub fn get_by_index(&self, index: u8) -> Option<&RegisterContent>

Get an entry by u8 index (0 = most recent).

This is the typed accessor for Register::History(u8). Returns None if the index is beyond the current history length.

pub fn get_numbered(&self, n: char) -> Option<RegisterContent>

Get an entry by numbered register character (‘0’-‘9’).

Returns None if the character is not a digit or the index is beyond the current history length.

pub fn len(&self) -> usize

Get the number of entries currently in the ring.

pub fn is_empty(&self) -> bool

Check if the ring is empty.

pub const fn capacity(&self) -> usize

Get the maximum capacity of the ring.

pub fn iter(&self) -> impl Iterator<Item = &RegisterContent>

Iterate over entries in order (most recent first).

pub fn clear(&mut self)

Clear all entries.

Trait Implementations

impl Clone for HistoryRing

fn clone(&self) -> HistoryRing

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HistoryRing

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

Formats the value using the given formatter.

impl Default for HistoryRing

fn default() -> Self

Returns the “default value” for a type.