Function raw_to_cursor

src/text_input.rs:1978–2031

Convert a raw char position to a visual (display) cursor position. Accounts for `}` and empty content positions.

(raw: &str, raw_pos: usize)

    /// Convert a raw char position to a visual (display) cursor position.
    /// Accounts for `}` and empty content positions.
    pub fn raw_to_cursor(raw: &str, raw_pos: usize) -> usize {
        let chars: Vec<char> = raw.chars().collect();
        let len = chars.len();
        let mut visual = 0usize;
        let mut raw_idx = 0usize;
        let mut escaped = false;
        let mut in_style_def = false;

        while raw_idx < len && raw_idx < raw_pos {
            let c = chars[raw_idx];

            if escaped {
                visual += 1;
                escaped = false;
                raw_idx += 1;
                continue;
            }

            match c {
                '\\' => {
                    escaped = true;
                    raw_idx += 1;
                }
                '{' if !in_style_def => {
                    in_style_def = true;
                    raw_idx += 1;
                }
                '|' if in_style_def => {
                    in_style_def = false;
                    // Check for empty content
                    if raw_idx + 1 < len && chars[raw_idx + 1] == '}' {
                        visual += 1; // empty content position
                        raw_idx += 1; // now at `}`
                        // Don't increment raw_idx again; `}` will be processed next
                    } else {
                        raw_idx += 1;
                    }
                }
                '}' if !in_style_def => {
                    visual += 1; // exit tag position
                    raw_idx += 1;
                }
                _ if in_style_def => {
                    raw_idx += 1;
                }
                _ => {
                    visual += 1;
                    raw_idx += 1;
                }
            }
        }

        visual
    }

    /// Count the total number of visual positions in a raw styled string.
    /// Includes visible chars, `}` exit positions, and empty content positions.