Function wrap_lines

src/text_input.rs:1465–1646

Word-wrap text into visual lines that fit within `max_width`. Splits on '\n' first (hard breaks), then wraps long lines at word boundaries. If `max_width <= 0`, no wrapping occurs (equivalent to `split_lines`).

(
    text: &str,
    max_width: f32,
    font_asset: Option<&'static crate::renderer::FontAsset>,
    font_size: u16,
    measure_fn: &dyn Fn(&str, &crate::text::TextConfig) -> crate::math::Dimension

/// Splits on '\n' first (hard breaks), then wraps long lines at word boundaries.
/// If `max_width <= 0`, no wrapping occurs (equivalent to `split_lines`).
pub fn wrap_lines(
    text: &str,
    max_width: f32,
    font_asset: Option<&'static crate::renderer::FontAsset>,
    font_size: u16,
    measure_fn: &dyn Fn(&str, &crate::text::TextConfig) -> crate::math::Dimensions,
) -> Vec<VisualLine> {
    let config = crate::text::TextConfig {
        font_asset,
        font_size,
        ..Default::default()
    };

    let hard_lines = split_lines(text);
    let mut result = Vec::new();

    for (global_start, line_text) in hard_lines {
        if line_text.is_empty() {
            result.push(VisualLine {
                text: String::new(),
                global_char_start: global_start,
                char_count: 0,
            });
            continue;
        }

        if max_width <= 0.0 {
            // No wrapping
            result.push(VisualLine {
                text: line_text.to_string(),
                global_char_start: global_start,
                char_count: line_text.chars().count(),
            });
            continue;
        }

        // Check if the whole line fits
        let full_width = measure_fn(line_text, &config).width;
        if full_width <= max_width {
            result.push(VisualLine {
                text: line_text.to_string(),
                global_char_start: global_start,
                char_count: line_text.chars().count(),
            });
            continue;
        }

        // Need to wrap this line
        let chars: Vec<char> = line_text.chars().collect();
        let total_chars = chars.len();
        let mut line_char_start = 0; // index within chars[]

        while line_char_start < total_chars {
            // Find how many characters fit in max_width
            let mut fit_count = 0;

            #[cfg(feature = "text-styling")]
            {