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use crate::{Element, Node, Selector};
/// Used to insert or remove elements by `Selector`, and trim the dom.
pub trait Editable {
/// Remove all empty text nodes from `self`.
///
/// ```
/// use html_query_parser::{parse, Editable, Htmlifiable};
///
/// let html = r#"
/// <!DOCTYPE html>
/// <html>
/// <head></head>
/// <body></body>
/// </html>"#;
///
/// let html = parse(html).trim().html();
/// assert_eq!(html, r#"<!DOCTYPE html><html><head></head><body></body></html>"#)
/// ```
fn trim(self) -> Self;
/// Insert `node` as the last child to all elements that matches the `selector`.
///
/// ```
/// use html_query_parser::{parse, Node, Selector, Editable, Htmlifiable};
///
/// let html = r#"<div><span>Ok</span></div>"#;
///
/// let selector = Selector::from("div");
/// let html = parse(html)
/// .insert_to(&selector, Node::new_element(
/// "span",
/// vec![],
/// vec![Node::Text("Cancel".to_string())]
/// ))
/// .html();
/// assert_eq!(html, r#"<div><span>Ok</span><span>Cancel</span></div>"#)
/// ```
fn insert_to(&mut self, selector: &Selector, target: Node) -> &mut Self;
/// Remove all elements that matches the `selector`.
///
/// ```
/// use html_query_parser::{parse, Selector, Editable, Htmlifiable};
///
/// let html = r#"
/// <div>
/// <div class="recommend"></div>
/// <div class="results"></div>
/// <div class="ad"></div>
/// </div>"#;
///
/// let selector = Selector::from(".ad");
/// let html = parse(html).remove_by(&selector).html();
/// assert_eq!(html, r#"
/// <div>
/// <div class="recommend"></div>
/// <div class="results"></div>
///
/// </div>"#)
/// ```
fn remove_by(&mut self, selector: &Selector) -> &mut Self;
}
impl Editable for Vec<Node> {
fn trim(self) -> Self {
let mut nodes: Vec<Node> = Vec::new();
for node in self {
match node {
Node::Element {
name,
attrs,
children,
} => nodes.push(Node::Element {
name,
attrs,
children: children.trim(),
}),
Node::Text(text) => {
if text.trim() != "" {
nodes.push(Node::Text(text));
}
}
Node::Comment(_) => {}
Node::Doctype => nodes.push(node),
}
}
nodes
}
fn insert_to(&mut self, selector: &Selector, target: Node) -> &mut Self {
for node in self.iter_mut() {
if let Node::Element {
name,
attrs,
children,
} = node
{
children.insert_to(selector, target.clone());
if selector.matches(&Element {
name: name.clone(),
attrs: attrs.clone(),
children: vec![],
}) {
children.push(target.clone());
}
}
}
self
}
fn remove_by(&mut self, selector: &Selector) -> &mut Self {
self.retain(|node| {
if let Node::Element { name, attrs, .. } = node {
let element = Element {
name: name.clone(),
attrs: attrs.clone(),
children: vec![],
};
return !selector.matches(&element);
}
true
});
for node in self.iter_mut() {
if let Node::Element { children, .. } = node {
children.remove_by(selector);
}
}
self
}
}
impl Editable for Element {
fn trim(self) -> Self {
Element {
name: self.name,
attrs: self.attrs,
children: self.children.trim(),
}
}
fn insert_to(&mut self, selector: &Selector, target: Node) -> &mut Self {
self.children.insert_to(selector, target.clone());
if selector.matches(self) {
self.children.push(target);
}
self
}
fn remove_by(&mut self, selector: &Selector) -> &mut Self {
self.children.remove_by(selector);
self
}
}