Struct TextEditor 

pub struct TextEditor { /* private fields */ }

A multi-line text editor with selection support.

The cursor is stored as a byte index into the UTF-8 string and is always kept on a character boundary. Selection is represented by an optional anchor position.

All shared text-buffer operations (cursor movement, selection, word boundaries, undo/redo, etc.) are provided via Deref/DerefMut to the inner TextBufferCore.

Implementations

impl TextEditor

pub fn new(text: impl Into<String>) -> Self

Create a new editor with the cursor at the start.

pub fn visual_nav_col(&self) -> Option<usize>

Sticky visual column used for wrap-aware vertical navigation.

pub fn set_visual_nav_col(&mut self, col: Option<usize>)

Set or clear the sticky visual column for wrap-aware vertical navigation.

pub fn clear(&mut self) -> bool

Clear all text while preserving undo/redo history.

pub fn apply(&mut self, ev: &TextAreaEvent)

Apply a TextAreaEvent to this state bundle.

pub fn handle_key(&mut self, key: KeyEvent) -> bool

Handle a key event.

Returns true if the state changed (text, cursor, or selection).

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

Insert a string at the cursor, replacing any selection.

pub fn move_home(&mut self) -> bool

Move to the start of the current line, clearing selection.

pub fn move_end(&mut self) -> bool

Move to the end of the current line, clearing selection.

pub fn select_home(&mut self) -> bool

Extend selection to the start of the current line.

pub fn select_end(&mut self) -> bool

Extend selection to the end of the current line.

pub fn move_up(&mut self) -> bool

Move up one line, clearing selection.

pub fn move_down(&mut self) -> bool

Move down one line, clearing selection.

pub fn select_up(&mut self) -> bool

Extend selection up one line.

pub fn select_down(&mut self) -> bool

Extend selection down one line.

Trait Implementations

impl Clone for TextEditor

fn clone(&self) -> TextEditor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TextEditor

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

Formats the value using the given formatter.

impl Default for TextEditor

fn default() -> Self

Returns the “default value” for a type.

impl Deref for TextEditor

type Target = TextBufferCore

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl DerefMut for TextEditor

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl Eq for TextEditor

impl PartialEq for TextEditor

fn eq(&self, other: &Self) -> 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.