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use std::ops::Deref;
use ego_tree::NodeRef;
use ego_tree::iter::{Traverse, Edge};
use html5ever::serialize::{serialize, SerializeOpts, TraversalScope};
use {Node, Selector};
use node::Element;
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct ElementRef<'a> {
node: NodeRef<'a, Node>,
}
impl<'a> ElementRef<'a> {
fn new(node: NodeRef<'a, Node>) -> Self {
ElementRef { node: node }
}
pub fn wrap(node: NodeRef<'a, Node>) -> Option<Self> {
if node.value().is_element() {
Some(ElementRef::new(node))
} else {
None
}
}
pub fn value(&self) -> &'a Element {
self.node.value().as_element().unwrap()
}
pub fn select<'b>(&self, selector: &'b Selector) -> Select<'a, 'b> {
let mut inner = self.traverse();
inner.next();
Select {
inner: inner,
selector: selector,
}
}
fn serialize(&self, traversal_scope: TraversalScope) -> String {
let opts = SerializeOpts {
scripting_enabled: false,
traversal_scope: traversal_scope,
create_missing_parent: false,
};
let mut buf = Vec::new();
serialize(&mut buf, self, opts).unwrap();
String::from_utf8(buf).unwrap()
}
pub fn html(&self) -> String {
self.serialize(TraversalScope::IncludeNode)
}
pub fn inner_html(&self) -> String {
self.serialize(TraversalScope::ChildrenOnly(None))
}
pub fn text(&self) -> Text<'a> {
Text { inner: self.traverse() }
}
}
impl<'a> Deref for ElementRef<'a> {
type Target = NodeRef<'a, Node>;
fn deref(&self) -> &NodeRef<'a, Node> { &self.node }
}
#[derive(Debug, Clone)]
pub struct Select<'a, 'b> {
inner: Traverse<'a, Node>,
selector: &'b Selector,
}
impl<'a, 'b> Iterator for Select<'a, 'b> {
type Item = ElementRef<'a>;
fn next(&mut self) -> Option<ElementRef<'a>> {
for edge in &mut self.inner {
if let Edge::Open(node) = edge {
if let Some(element) = ElementRef::wrap(node) {
if self.selector.matches(&element) {
return Some(element);
}
}
}
}
None
}
}
#[derive(Debug, Clone)]
pub struct Text<'a> {
inner: Traverse<'a, Node>,
}
impl<'a> Iterator for Text<'a> {
type Item = &'a str;
fn next(&mut self) -> Option<&'a str> {
for edge in &mut self.inner {
if let Edge::Open(node) = edge {
if let &Node::Text(ref text) = node.value() {
return Some(&*text);
}
}
}
None
}
}
mod element;
mod serializable;