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<!doctype html>
<title>CodeMirror: Indented wrapped 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>
<style>
.CodeMirror {border-top: 1px solid black; border-bottom: 1px solid black;}
.CodeMirror pre > * { text-indent: 0px; }
</style>
<div id=nav>
<a href="https://codemirror.net/5"><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/codemirror5">Code</a>
</ul>
<ul>
<li><a class=active href="#">Indented wrapped line</a>
</ul>
</div>
<article>
<h2>Indented wrapped line demo</h2>
<form><textarea id="code" name="code">
<!doctype html>
<body>
<h2 id="overview">Overview</h2>
<p>CodeMirror is a code-editor component that can be embedded in Web pages. The core library provides <em>only</em> the editor component, no accompanying buttons, auto-completion, or other IDE functionality. It does provide a rich API on top of which such functionality can be straightforwardly implemented. See the <a href="#addons">add-ons</a> included in the distribution, and the <a href="https://github.com/jagthedrummer/codemirror-ui">CodeMirror UI</a> project, for reusable implementations of extra features.</p>
<p>CodeMirror works with language-specific modes. Modes are JavaScript programs that help color (and optionally indent) text written in a given language. The distribution comes with a number of modes (see the <a href="../mode/"><code>mode/</code></a> directory), and it isn't hard to <a href="#modeapi">write new ones</a> for other languages.</p>
</body>
</textarea></form>
<p>This page uses a hack on top of the <code>"renderLine"</code>
event to make wrapped text line up with the base indentation of
the line.</p>
<script>
var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
lineNumbers: true,
lineWrapping: true,
mode: "text/html"
});
var charWidth = editor.defaultCharWidth(), basePadding = 4;
editor.on("renderLine", function(cm, line, elt) {
var off = CodeMirror.countColumn(line.text, null, cm.getOption("tabSize")) * charWidth;
elt.style.textIndent = "-" + off + "px";
elt.style.paddingLeft = (basePadding + off) + "px";
});
editor.refresh();
</script>
</article>