loda-rust/rust_project/loda-rust-web/web/codemirror/demo/activeline.html

<!doctype html>

<title>CodeMirror: Active Line Demo</title>
<meta charset="utf-8"/>
<link rel=stylesheet href="../doc/docs.css">

<link rel="stylesheet" href="../lib/codemirror.css">
<script src="../lib/codemirror.js"></script>
<script src="../mode/xml/xml.js"></script>
<script src="../addon/selection/active-line.js"></script>
<style>
      .CodeMirror {border-top: 1px solid black; border-bottom: 1px solid black;}
    </style>
<div id=nav>
  <a href="https://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../doc/logo.png"></a>

  <ul>
    <li><a href="../index.html">Home</a>
    <li><a href="../doc/manual.html">Manual</a>
    <li><a href="https://github.com/codemirror/codemirror">Code</a>
  </ul>
  <ul>
    <li><a class=active href="#">Active Line</a>
  </ul>
</div>

<article>
<h2>Active Line Demo</h2>
<form><textarea id="code" name="code">
<?xml version="1.0" encoding="UTF-8"?>
<rss xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"
     xmlns:georss="http://www.georss.org/georss"
     xmlns:twitter="http://api.twitter.com">
  <channel>
    <title>Twitter / codemirror</title>
    <link>http://twitter.com/codemirror</link>
    <atom:link type="application/rss+xml"
               href="http://twitter.com/statuses/user_timeline/242283288.rss" rel="self"/>
    <description>Twitter updates from CodeMirror / codemirror.</description>
    <language>en-us</language>
    <ttl>40</ttl>
  <item>
    <title>codemirror: http://cloud-ide.com &#8212; they're springing up like mushrooms. This one
      uses CodeMirror as its editor.</title>
    <description>codemirror: http://cloud-ide.com &#8212; they're springing up like mushrooms. This
      one uses CodeMirror as its editor.</description>
    <pubDate>Thu, 17 Mar 2011 23:34:47 +0000</pubDate>
    <guid>http://twitter.com/codemirror/statuses/48527733722058752</guid>
    <link>http://twitter.com/codemirror/statuses/48527733722058752</link>
    <twitter:source>web</twitter:source>
    <twitter:place/>
  </item>
  <item>
    <title>codemirror: Posted a description of the CodeMirror 2 internals at
      https://codemirror.net/2/internals.html</title>
    <description>codemirror: Posted a description of the CodeMirror 2 internals at
      https://codemirror.net/2/internals.html</description>
    <pubDate>Wed, 02 Mar 2011 12:15:09 +0000</pubDate>
    <guid>http://twitter.com/codemirror/statuses/42920879788789760</guid>
    <link>http://twitter.com/codemirror/statuses/42920879788789760</link>
    <twitter:source>web</twitter:source>
    <twitter:place/>
  </item>
  </channel>
</rss></textarea></form>

    <script>
var nonEmpty = false;
var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
  mode: "application/xml",
  styleActiveLine: true,
  lineNumbers: true,
  lineWrapping: true
});

function toggleSelProp() {
  nonEmpty = !nonEmpty;
  editor.setOption("styleActiveLine", {nonEmpty: nonEmpty});
  var label = nonEmpty ? 'Disable nonEmpty option' : 'Enable nonEmpty option';
  document.getElementById('toggleButton').innerText = label;
}
</script>

    <p>Styling the current cursor line.</p>

    <button onclick="toggleSelProp()" id="toggleButton">Enable <code>nonEmpty</code> option</button>

  </article>