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use super::Selector;
use crate::{Element, Node};
/// Insert and remove elements by [`Selector`], and trim the DOM.
pub trait Editable {
/// Remove all empty text nodes from `self`.
///
/// ```
/// use html_editor::parse;
/// use html_editor::operation::*;
///
/// let html = r#"
/// <!DOCTYPE html>
/// <html>
/// <head></head>
/// <body></body>
/// </html>"#;
///
/// let html = parse(html).unwrap().trim().html();
/// assert_eq!(html, r#"<!DOCTYPE html><html><head></head><body></body></html>"#)
/// ```
fn trim(&mut self) -> &mut Self;
/// Insert `node` as the last child to all elements that matches the `selector`.
///
/// ```
/// use html_editor::{parse, Node};
/// use html_editor::operation::*;
///
/// let html = r#"<div><span>Ok</span></div>"#;
///
/// let selector = Selector::from("div");
/// let html = parse(html)
/// .unwrap()
/// .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_editor::parse;
/// use html_editor::operation::*;
///
/// 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).unwrap().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;
/// Replace all elements that matches the `selector` with new nodes.
///
/// ```
/// use html_editor::{parse, Node, operation::*};
///
/// let html = r#"
/// <div>
/// <p>Hello</p>
/// </div>"#;
///
/// let selector = Selector::from("p");
/// let html = parse(html)
/// .unwrap()
/// .replace_with(&selector, |p| {
/// let new_text = format!("{} World!", p.children[0].html());
/// Node::Comment(new_text)
/// })
/// .html();
///
/// assert_eq!(html, r#"
/// <div>
/// <!--Hello World!-->
/// </div>"#)
/// ```
fn replace_with(&mut self, selector: &Selector, f: fn(el: &Element) -> Node) -> &mut Self;
}
impl Editable for Vec<Node> {
fn trim(&mut self) -> &mut Self {
self.retain(|node| match node {
Node::Doctype(..) => true,
Node::Comment(..) => false,
Node::Text(text) => !text.trim().is_empty(),
Node::Element { .. } => true,
});
for node in self.iter_mut() {
if let Node::Element(el) = node {
el.children.trim();
}
}
self
}
fn insert_to(&mut self, selector: &Selector, target: Node) -> &mut Self {
for node in self.iter_mut() {
if let Node::Element(el) = node {
el.children.insert_to(selector, target.clone());
if selector.matches(&Element {
name: el.name.clone(),
attrs: el.attrs.clone(),
children: vec![],
}) {
el.children.push(target.clone());
}
}
}
self
}
fn remove_by(&mut self, selector: &Selector) -> &mut Self {
self.retain(|node| {
if let Node::Element(el) = node {
let element = Element {
name: el.name.clone(),
attrs: el.attrs.clone(),
children: vec![],
};
return !selector.matches(&element);
}
true
});
for node in self.iter_mut() {
if let Node::Element(el) = node {
el.remove_by(selector);
}
}
self
}
fn replace_with(&mut self, selector: &Selector, f: fn(el: &Element) -> Node) -> &mut Self {
for node in self.iter_mut() {
if let Node::Element(ref mut el) = node {
if selector.matches(el) {
*node = f(el);
} else {
el.replace_with(selector, f);
}
}
}
self
}
}
impl Editable for Element {
fn trim(&mut self) -> &mut Self {
self.children.trim();
self
}
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
}
fn replace_with(&mut self, selector: &Selector, f: fn(el: &Element) -> Node) -> &mut Self {
self.children.replace_with(selector, f);
self
}
}