Method insert_char

src/editor/document.rs:152–154

(&mut self, char_idx: usize, ch: char)

    }

    pub fn insert_char(&mut self, char_idx: usize, ch: char) {
        self.rope.insert_char(char_idx.min(self.len_chars()), ch);
    }

    pub fn insert_str(&mut self, char_idx: usize, text: &str) {
        if !text.is_empty() {