fn mixed_url_wrap_ranges()

in codex-rs/tui/src/wrapping.rs [783:877]

• 87 lines of code
• 19 McCabe index (conditional complexity)

fn mixed_url_wrap_ranges(
    text: &str,
    initial_width: usize,
    subsequent_width: usize,
) -> Vec<Range<usize>> {
    let leading_space_width = text.chars().take_while(|ch| *ch == ' ').count();
    let mut words = Vec::new();
    let mut cursor = 0usize;
    for word in WordSeparator::AsciiSpace.find_words(text) {
        let word_start = cursor;
        let word_end = word_start + word.word.len();
        let trailing_space_end = word_end + word.whitespace.len();
        if !word.word.is_empty() {
            words.push(MixedUrlWord {
                range: word_start..word_end,
                is_url: is_url_like_token(word.word),
            });
        }
        cursor = trailing_space_end;
    }

    let mut lines = Vec::new();
    let mut line_start = None;
    let mut line_end = 0usize;
    let mut line_width = 0usize;
    let mut line_limit = initial_width.max(1);

    for word in words {
        let mut pending = split_mixed_url_word(text, word, line_limit);
        let mut pending_idx = 0usize;

        while let Some(piece) = pending.get(pending_idx).cloned() {
            let empty_line_prefix_width = if line_start.is_none() && lines.is_empty() {
                leading_space_width
            } else {
                0
            };
            let empty_line_piece_limit = line_limit.saturating_sub(empty_line_prefix_width).max(1);
            if line_start.is_none() && !piece.is_url && piece.width(text) > empty_line_piece_limit {
                pending.splice(
                    pending_idx..=pending_idx,
                    split_mixed_url_word(text, piece, empty_line_piece_limit),
                );
                continue;
            }

            let piece_width = piece.width(text);
            let inter_word_space = line_start
                .map(|_| text[line_end..piece.range.start].len())
                .unwrap_or(0);
            let fits = if line_start.is_none() {
                piece.is_url
                    || empty_line_prefix_width + piece_width <= line_limit
                    || empty_line_prefix_width >= line_limit
            } else {
                line_width + inter_word_space + piece_width <= line_limit
            };

            if fits {
                if line_start.is_none() {
                    let is_first_output_line = lines.is_empty();
                    let start = if is_first_output_line {
                        0
                    } else {
                        piece.range.start
                    };
                    line_start = Some(start);
                    line_width = if is_first_output_line {
                        leading_space_width + piece_width
                    } else {
                        piece_width
                    };
                } else {
                    line_width += inter_word_space + piece_width;
                }
                line_end = piece.range.end;
                pending_idx += 1;
                continue;
            }

            if let Some(start) = line_start.take() {
                lines.push(start..line_end);
            }
            line_end = 0;
            line_width = 0;
            line_limit = subsequent_width.max(1);
        }
    }

    if let Some(start) = line_start {
        lines.push(start..line_end);
    }

    lines
}