Wrap code blocks in src/page/guide.rs

giode.rs

fn view_guide_html(content: &str) -> Node<Msg> {
    div![
        C![
            // it has to be "markdown-body" so it's content is styled by Github CSS
            C.markdown_body,
        ],
        wrap_code_blocks(raw!(content))
    ]
}


/// Adds element keys to code blocks to force reinitialization if code changed.
fn wrap_code_blocks(nodes: Vec<Node<Msg>>) -> Vec<Node<Msg>> {
    use std::hash::{Hash, Hasher};
    nodes
        .into_iter()
        .map(|node| match node {
            Node::Element(el) => {
                if el.is_custom() && el.tag.as_str() == "code-block" {
                    let mut hasher =
                        std::collections::hash_map::DefaultHasher::new();
                    el.get_text().hash(&mut hasher);
                    custom![
                        el.tag,
                        el_key(&hasher.finish().to_string()),
                        el.children,
                    ]
                } else {
                    Node::Element(el)
                }
            },
            _ => node,
        })
        .collect()
}