Function build_selection_range

src/selection_range.rs:74–91

Build a `SelectionRange` linked list from a list of spans sorted outermost-first.

(content: &str, spans: &[(u32, u32)])

/// Build a `SelectionRange` linked list from a list of spans sorted
/// outermost-first.
fn build_selection_range(content: &str, spans: &[(u32, u32)]) -> SelectionRange {
    if spans.is_empty() {
        let range = Range::new(Position::new(0, 0), Position::new(0, 0));
        return SelectionRange {
            range,
            parent: None,
        };
    }

    // Start from the outermost and wrap inward.
    let mut current = to_selection_range(content, spans[0], None);

    for &span in &spans[1..] {
        current = to_selection_range(content, span, Some(current));
    }

    current
}

fn to_selection_range(
    content: &str,