golden hour

/home/phakp/public_html/formtools/global/codemirror/demo

File/Folder	Size	Actions
activeline.html	3.16 KB
anywordhint.html	2.62 KB
bidi.html	4.81 KB
btree.html	2.89 KB
buffers.html	3.48 KB
changemode.html	1.68 KB
closebrackets.html	1.64 KB
closetag.html	1.26 KB
complete.html	4.19 KB
emacs.html	2.42 KB
folding.html	4.13 KB
fullscreen.html	3.38 KB
hardwrap.html	2.51 KB
html5complete.html	1.73 KB
indentwrap.html	2.52 KB
lint.html	3.98 KB
loadmode.html	2.17 KB
marker.html	1.45 KB
markselection.html	1.83 KB
matchhighlighter.html	4.72 KB
matchtags.html	1.34 KB
merge.html	4.08 KB
multiplex.html	2.11 KB
mustache.html	2.05 KB
panel.html	3.38 KB
placeholder.html	1.47 KB
preview.html	2.36 KB
requirejs.html	2.27 KB
resize.html	1.33 KB
rulers.html	1.39 KB
runmode.html	2.21 KB
search.html	4.44 KB
simplemode.html	7.9 KB
simplescrollbars.html	4.89 KB
spanaffectswrapping_shim.html	2.97 KB
sublime.html	2.78 KB
tern.html	4.37 KB
theme.html	6.04 KB
trailingspace.html	1.53 KB
variableheight.html	2.02 KB
vim.html	3.88 KB
visibletabs.html	1.82 KB
widget.html	2.87 KB
xmlcomplete.html	3.62 KB

Edit: activeline.html

<!doctype html>

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

<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
      http://codemirror.net/2/internals.html</title>
    <description>codemirror: Posted a description of the CodeMirror 2 internals at
      http://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>

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>