Struct PromptInputState 

pub struct PromptInputState {
    pub mode: InputMode,
    pub buffer: String,
    pub cursor: usize,
    pub history: Vec<String>,
    pub history_idx: Option<usize>,
    pub draft: String,
    pub draft_mode: InputMode,
}

Mutable state of the multi-mode prompt input.

Owns the editing buffer, byte-cursor, in-session history, and a stash slot for the user’s draft when they walk back through history. Rendering is in crate::tui::ui::input.

Fields

mode: InputMode

buffer: String

cursor: usize

Byte offset into [buffer]. Always at a char boundary.

history: Vec<String>

Submitted entries, oldest first. Capped at HISTORY_CAPACITY.

history_idx: Option<usize>

Position when navigating history. None means “live draft”.

draft: String

Stash slot: when the user starts walking history, the current buffer is preserved here and restored when they walk past the end.

draft_mode: InputMode

Stash for the current mode while walking history. Restored alongside draft.

Implementations

impl PromptInputState

pub fn new() -> Self

pub fn insert_char(&mut self, ch: char)

Insert a single character at the cursor. Updates cursor to stay just past the inserted char.

pub fn backspace(&mut self) -> bool

Delete the character to the left of the cursor (Backspace). Returns true if a char was deleted.

pub fn delete_forward(&mut self)

Delete the character at the cursor (Delete key).

pub fn move_left(&mut self)

Move cursor one char left.

pub fn move_right(&mut self)

Move cursor one char right.

pub fn move_home(&mut self)

Move to start of the current visual line (delimited by \n).

pub fn move_end(&mut self)

Move to end of the current visual line.

pub fn move_prev_line(&mut self)

Move cursor to the same column on the previous visual line. No-op when the cursor is already on the first line. If the previous line is shorter than the current column, the cursor lands at the end of the previous line (emacs previous-line semantics).

pub fn move_next_line(&mut self)

Move cursor to the same column on the next visual line. No-op when the cursor is already on the last line. If the next line is shorter than the current column, the cursor lands at the end of the next line (emacs next-line semantics).

pub fn cursor_on_first_line(&self) -> bool

True when the cursor sits on the first visual line.

pub fn cursor_on_last_line(&self) -> bool

True when the cursor sits on the last visual line.

pub fn history_prev(&mut self) -> bool

Walk history one step back (older). Returns true if state changed.

pub fn history_next(&mut self) -> bool

Walk history one step forward (newer). Restores the draft when stepping past the most-recent entry. Returns true if state changed.

pub fn record_submission(&mut self, prefixed: String)

Push the just-submitted entry onto the history ring (with mode prefix) and reset transient state.

Trait Implementations

impl Clone for PromptInputState

fn clone(&self) -> PromptInputState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PromptInputState

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

Formats the value using the given formatter.

impl Default for PromptInputState

fn default() -> Self

Returns the “default value” for a type.

impl Eq for PromptInputState

impl PartialEq for PromptInputState

fn eq(&self, other: &PromptInputState) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for PromptInputState