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1 <!doctype html>
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2
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3 <title>CodeMirror: Indented wrapped line demo</title>
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4 <meta charset="utf-8"/>
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5 <link rel=stylesheet href="../doc/docs.css">
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6
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7 <link rel="stylesheet" href="../lib/codemirror.css">
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8 <script src="../lib/codemirror.js"></script>
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9 <script src="../mode/xml/xml.js"></script>
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10 <style>
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11 .CodeMirror {border-top: 1px solid black; border-bottom: 1px solid black;}
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12 .CodeMirror pre > * { text-indent: 0px; }
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13 </style>
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14 <div id=nav>
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15 <a href="https://codemirror.net/5"><h1>CodeMirror</h1><img id=logo src="../doc/logo.png"></a>
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16
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17 <ul>
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18 <li><a href="../index.html">Home</a>
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19 <li><a href="../doc/manual.html">Manual</a>
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20 <li><a href="https://github.com/codemirror/codemirror5">Code</a>
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21 </ul>
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22 <ul>
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23 <li><a class=active href="#">Indented wrapped line</a>
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24 </ul>
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25 </div>
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26
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27 <article>
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28 <h2>Indented wrapped line demo</h2>
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29 <form><textarea id="code" name="code">
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30 <!doctype html>
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31 <body>
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32 <h2 id="overview">Overview</h2>
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33
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34 <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>
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35
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36 <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>
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37 </body>
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38 </textarea></form>
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39
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40 <p>This page uses a hack on top of the <code>"renderLine"</code>
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41 event to make wrapped text line up with the base indentation of
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42 the line.</p>
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43
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44 <script>
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45 var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
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46 lineNumbers: true,
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47 lineWrapping: true,
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48 mode: "text/html"
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49 });
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50 var charWidth = editor.defaultCharWidth(), basePadding = 4;
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51 editor.on("renderLine", function(cm, line, elt) {
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52 var off = CodeMirror.countColumn(line.text, null, cm.getOption("tabSize")) * charWidth;
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53 elt.style.textIndent = "-" + off + "px";
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54 elt.style.paddingLeft = (basePadding + off) + "px";
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55 });
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56 editor.refresh();
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57 </script>
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58
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59 </article>
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