pub fn parse_html(h: &str) -> dom::Node {

    dom::Node::from(h)

}

pub fn parse_css(c: &str) -> css::Sheet {

    css::Sheet::from(c)

}

pub fn build_style_tree<'a>(h: &'a dom::Node, c: &'a css::Sheet) -> style::StyledNode<'a> {

    style::style_tree(h, c)

}

pub fn build_layout_tree<'a>(

    s: &'a style::StyledNode,

    d: layout::Dimensions,

) -> layout::LayoutBox<'a> {

    layout::layout_tree(s, d)

}

pub fn build_display_list(l: &layout::LayoutBox) -> painting::DisplayList {

    painting::build_display_list(l)

}