You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: cursor.rs
    path of file: ./repos/dioxus/packages/native-core/src/utils
    
    the code of the file until where you have to start completion: //! A cursor implementation that can be used to navigate and edit text.

use std::{cmp::Ordering, ops::Range};

use keyboard_types::{Code, Key, Modifiers};

/// This contains the information about the text that is used by the cursor to handle navigation.
pub trait Text {
    /// Returns the line at the given index.
    fn line(&self, number: usize) -> Option<&Self>;
    /// Returns the length of the text in characters.
    fn length(&self) -> usize;
    /// Returns the number of lines in the text.
    fn line_count(&self) -> usize;
    /// Returns the character at the given character index.
    fn character(&self
    
    pub fn move_col(&mut self, change: i32, text: &(impl Text + ?Sized)) {
        self.realize_col(text);
        let idx = self.idx(text) as i32;
        if idx + change >= 0 && idx + change <= text.length() as i32 {
            let len_line = self.len_line(text) as i32;
            let new_col = self.col as i32 + change;
            let diff = new_col - len_line;
            if diff > 0 {
                self.down(text);
                self.col = 0;
                self.move_col(diff - 1, text);
            } else if new_col < 0 {
                self.up(text);
                self.col = self.len_line(text);
                self.move_col(new_col + 1, text);
            } else {
                self.col = new_col as usize;
            }
        }
    }