Struct DocumentBuffer 

pub struct DocumentBuffer { /* private fields */ }

Document buffer that manages content editing for any file type

Implementations

impl DocumentBuffer

pub fn new() -> Self

Create a new empty buffer (defaults to Markdown)

pub fn from_file(path: impl AsRef<Path>) -> Result<Self>

Create buffer from file

pub fn from_string(content: &str) -> Result<Self>

Create buffer from string (defaults to Markdown)

pub fn cursor(&self) -> &Cursor

Get the current cursor position

pub fn cursor_mut(&mut self) -> &mut Cursor

Get mutable cursor

pub fn file_path(&self) -> Option<&Path>

Get the file path

pub fn is_modified(&self) -> bool

Check if buffer has been modified

pub fn file_type(&self) -> &FileType

Get the file type

pub fn document_type(&self) -> &DocumentType

Get the document type

pub fn markdown(&self) -> Option<&Markdown>

Get the underlying Markdown AST (returns None if not a Markdown document)

pub fn line_map(&self) -> Option<&LineMap>

Get the LineMap (returns None if not a Markdown document)

pub fn lines(&self) -> &[String]

Get all lines

pub fn line(&self, index: usize) -> Option<&str>

Get a specific line

pub fn line_count(&self) -> usize

Get total line count

pub fn node_at_cursor(&self) -> Option<&Node>

Get the node at current cursor position (only for Markdown documents)

pub fn move_cursor(&mut self, movement: CursorMovement)

Move cursor

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

Insert a character at cursor position

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

Insert a string at cursor position (useful for IME/paste operations)

pub fn delete_range(&mut self, start_col: usize)

Delete a range of characters on the current line (from start_col to current cursor position) Moves cursor to start_col after deletion

pub fn delete_char(&mut self)

Delete character at cursor (backspace)

pub fn insert_newline(&mut self)

Insert newline at cursor

pub fn undo(&mut self)

Undo the last edit action

pub fn redo(&mut self)

Redo the last undone edit action

pub fn save(&mut self) -> Result<()>

Save buffer to file

pub fn save_as(&mut self, path: impl AsRef<Path>) -> Result<()>

Save buffer to a specific file

pub fn content(&self) -> String

Get buffer content as string

pub fn word_start_column(&self, line: usize, column: usize) -> usize

Get the start column of the word at cursor position This is useful for code completion to determine how much text to replace

pub fn display_width_to_column(&self, line: usize, column: usize) -> usize

Calculate the display width from the start of a line to a given column position This accounts for wide characters (e.g., CJK characters, emoji) that take 2 columns

pub fn find_all(&self, query: &str) -> Vec<(usize, usize)>

Find all occurrences of a query string in the buffer Returns a list of (line, column) positions (0-indexed)

pub fn find_next( &self, query: &str, from_line: usize, from_column: usize, ) -> Option<(usize, usize)>

Find the next occurrence of a query string starting from a position Returns the (line, column) position or None if not found

pub fn find_prev( &self, query: &str, from_line: usize, from_column: usize, ) -> Option<(usize, usize)>

Find the previous occurrence of a query string starting from a position Returns the (line, column) position or None if not found

pub fn replace_at( &mut self, line: usize, column: usize, old_text: &str, new_text: &str, ) -> bool

Replace text at a specific position Returns true if replacement was successful

pub fn replace_all(&mut self, old_text: &str, new_text: &str) -> usize

Replace all occurrences of old_text with new_text Returns the number of replacements made

Trait Implementations

impl Clone for DocumentBuffer

fn clone(&self) -> DocumentBuffer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DocumentBuffer

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

Formats the value using the given formatter.

impl Default for DocumentBuffer

fn default() -> Self

Returns the “default value” for a type.