Struct InputBuffer 

pub struct InputBuffer {
    pub content: String,
    pub cursor_position: usize,
    pub history: VecDeque<String>,
    pub history_index: Option<usize>,
    pub history_buffer: String,
}

Input state - user input buffer, cursor, and history

All cursor positions are byte offsets that are guaranteed to sit on UTF-8 char boundaries. Methods navigate by whole characters, not raw bytes, so multi-byte input (emoji, CJK, accented chars) is safe.

Fields

content: String

User input buffer

cursor_position: usize

Cursor position as a byte offset (always on a char boundary)

history: VecDeque<String>

Input history for arrow key navigation (persisted across sessions)

history_index: Option<usize>

Current position in history (None = editing current input, Some(i) = viewing history[i])

history_buffer: String

Saved input when navigating away from current draft

Implementations

impl InputBuffer

pub fn new() -> Self

Create a new empty input buffer

pub fn load_history(&mut self, history: VecDeque<String>)

Load persisted input history (from a resumed conversation)

pub fn clear(&mut self)

Clear the input buffer

pub fn is_empty(&self) -> bool

Check if input is empty

pub fn get(&self) -> &str

Get the input content

pub fn set(&mut self, content: impl Into<String>)

Set the input content

pub fn insert(&mut self, c: char)

Insert a character at cursor position

pub fn insert_str(&mut self, s: &str)

Insert a string at cursor position

pub fn backspace(&mut self) -> bool

Delete character before cursor (backspace)

pub fn delete(&mut self) -> bool

Delete character at cursor (delete key)

pub fn move_left(&mut self)

Move cursor left by one character

pub fn move_right(&mut self)

Move cursor right by one character

pub fn move_home(&mut self)

Move cursor to start

pub fn move_end(&mut self)

Move cursor to end

Trait Implementations

impl Default for InputBuffer

fn default() -> Self

Returns the “default value” for a type.