Function parsercher::search_dom[−][src]

pub fn search_dom(dom: &Dom, needle: &Dom) -> Option<Dom>

Expand description

Returns partial trees from the Dom structure tree. Duplicate everything below the subtree that matches the needle tree.

The Tag structures contained in the needle tree are evaluated under sufficient conditions.

Examples

Get the subtree that satisfies the following tag names and attribute values.

<ul class="targetList">
  <li class="key1></li>
  <li class="key2></li>
</ul>

use parsercher;

let html = r#"
<body>
  <ul id="list1" class="targetList">
    <li class="key1">1-1</li>
    <li class="key2">
      <span>1-2</span>
    </li>
  </ul>

  <ul id="list2">
    <li class="key1">2-1</li>
    <li>2-2</li>
  </ul>

  <div>
    <div>
      <ul class="targetList">
        <ul id="list3" class="targetList">
          <li class="key1">3-1</li>
          <li class="item">3-2</li>
          <li class="key2">3-3</li>
        </ul>
      </ul>
    </div>
  </div>

  <ul id="list4">
    <li class="key1">4-1</li>
    <li class="key2">4-2</li>
  </ul>

</body>
"#;

let root_dom = parsercher::parse(&html).unwrap();

let needle = r#"
<ul class="targetList">
  <li class="key1"></li>
  <li class="key2"></li>
</ul>
"#;
let needle_dom = parsercher::parse(&needle).unwrap();
// Remove `root`dom of needle_dom
let needle_dom = needle_dom.get_children().unwrap().get(0).unwrap();

if let Some(dom) = parsercher::search_dom(&root_dom, &needle_dom) {
    parsercher::print_dom_tree(&dom);
}

output:

<root>
  <ul id="list1" class="targetList">
    <li class="key1">
      TEXT: "1-1"
    <li class="key2">
      <span>
        TEXT: "1-2"
  <ul class="targetList" id="list3">
    <li class="key1">
      TEXT: "3-1"
    <li class="item">
      TEXT: "3-2"
    <li class="key2">
      TEXT: "3-3"