Struct Editor 

pub struct Editor { /* private fields */ }

Core text editor combining Rope storage with cursor management.

Provides insert/delete/move operations with grapheme-aware cursor handling, undo/redo, and selection support. Cursor is always kept in valid bounds.

Implementations

impl Editor

pub fn new() -> Self

Create an empty editor.

pub fn with_text(text: &str) -> Self

Create an editor with initial text. Cursor starts at the end.

pub fn set_max_history(&mut self, max: usize)

Set the maximum undo history depth.

pub fn set_max_undo_size(&mut self, bytes: usize)

Set the maximum undo history size in bytes.

pub fn text(&self) -> String

Get the full text content as a string.

pub fn rope(&self) -> &Rope

Get a reference to the underlying rope.

pub fn cursor(&self) -> CursorPosition

Get the current cursor position.

pub fn set_cursor(&mut self, pos: CursorPosition)

Set cursor position (will be clamped to valid bounds). Clears selection.

pub fn selection(&self) -> Option<Selection>

Current selection, if any.

pub fn can_undo(&self) -> bool

Whether undo is available.

pub fn can_redo(&self) -> bool

Whether redo is available.

pub fn is_empty(&self) -> bool

Check if the editor is empty.

pub fn line_count(&self) -> usize

Number of lines in the buffer.

pub fn line_text(&self, line: usize) -> Option<String>

Get the text of a specific line (without trailing newline).

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

Insert a single character at the cursor position.

pub fn insert_text(&mut self, text: &str)

Insert text at the cursor position. Deletes selection first if active.

Control characters (except newline and tab) are stripped to prevent terminal corruption.

pub fn insert_newline(&mut self)

Insert a newline at the cursor position.

pub fn delete_backward(&mut self) -> bool

Delete the character before the cursor (backspace). Deletes selection if active.

Returns true if a character was deleted.

pub fn delete_forward(&mut self) -> bool

Delete the character after the cursor (delete key). Deletes selection if active.

Returns true if a character was deleted.

pub fn delete_word_backward(&mut self) -> bool

Delete the word before the cursor (Ctrl+Backspace).

Returns true if any text was deleted.

pub fn delete_to_end_of_line(&mut self) -> bool

Delete from cursor to end of line (Ctrl+K).

Returns true if any text was deleted.

pub fn undo(&mut self) -> bool

Undo the last edit operation.

pub fn redo(&mut self) -> bool

Redo the last undone operation.

pub fn move_left(&mut self)

Move cursor left by one grapheme.

pub fn move_right(&mut self)

Move cursor right by one grapheme.

pub fn move_up(&mut self)

Move cursor up one line.

pub fn move_down(&mut self)

Move cursor down one line.

pub fn move_word_left(&mut self)

Move cursor left by one word.

pub fn move_word_right(&mut self)

Move cursor right by one word.

pub fn move_to_line_start(&mut self)

Move cursor to start of line.

pub fn move_to_line_end(&mut self)

Move cursor to end of line.

pub fn move_to_document_start(&mut self)

Move cursor to start of document.

pub fn move_to_document_end(&mut self)

Move cursor to end of document.

pub fn select_left(&mut self)

Extend selection left by one grapheme.

pub fn select_right(&mut self)

Extend selection right by one grapheme.

pub fn select_up(&mut self)

Extend selection up one line.

pub fn select_down(&mut self)

Extend selection down one line.

pub fn select_word_left(&mut self)

Extend selection left by one word.

pub fn select_word_right(&mut self)

Extend selection right by one word.

pub fn select_all(&mut self)

Select all text.

pub fn clear_selection(&mut self)

Clear current selection without moving cursor.

pub fn selected_text(&self) -> Option<String>

Get selected text, if any non-empty selection exists.

pub fn set_text(&mut self, text: &str)

Replace all content and reset cursor to end. Clears undo history.

pub fn clear(&mut self)

Clear all content and reset cursor. Clears undo history.

Trait Implementations

impl Clone for Editor

fn clone(&self) -> Editor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Editor

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

Formats the value using the given formatter.

impl Default for Editor

fn default() -> Self

Returns the “default value” for a type.