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use crate::{VElement, VirtualNode};
impl VirtualNode {
pub fn filter_label<'a, F>(&'a self, filter: F) -> Vec<&'a VirtualNode>
where
F: Fn(&str) -> bool,
{
let mut descendants: Vec<&'a VirtualNode> = vec![];
match self {
VirtualNode::Text(_) => { }
VirtualNode::Element(element_node) => {
for child in element_node.children.iter() {
get_descendants(&mut descendants, child);
}
}
}
descendants
.into_iter()
.filter(|vn: &&'a VirtualNode| match vn {
VirtualNode::Text(_) => false,
VirtualNode::Element(element_node) => match element_node.attrs.get("label") {
Some(label) => filter(label),
None => false,
},
})
.collect()
}
pub fn filter_label_equals<'a>(&'a self, label: &str) -> Vec<&'a VirtualNode> {
self.filter_label(|node_label| node_label == label)
}
}
fn get_descendants<'a>(descendants: &mut Vec<&'a VirtualNode>, node: &'a VirtualNode) {
descendants.push(node);
match node {
VirtualNode::Text(_) => { }
VirtualNode::Element(element_node) => {
for child in element_node.children.iter() {
get_descendants(descendants, child);
}
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::collections::HashMap;
#[test]
fn label_equals() {
let span = VirtualNode::element("span");
let mut attrs = HashMap::new();
attrs.insert("label".to_string(), "hello".to_string());
let mut em = VElement::new("em");
em.attrs = attrs;
let mut html = VElement::new("div");
html.children.push(span);
html.children.push(em.into());
let html_node = VirtualNode::Element(html);
let hello_nodes = html_node.filter_label_equals("hello");
assert_eq!(hello_nodes.len(), 1);
}
}