Function char_index_to_byte

src/text_input.rs:1360–1365

Convert a character index to a byte index in the string.

(s: &str, char_idx: usize)

/// Convert a character index to a byte index in the string.
pub fn char_index_to_byte(s: &str, char_idx: usize) -> usize {
    s.char_indices()
        .nth(char_idx)
        .map(|(byte_pos, _)| byte_pos)
        .unwrap_or(s.len())
}

/// Find the char index of the start of the line containing `char_pos`.
/// A "line" is delimited by '\n'. Returns 0 for the first line.