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indentwrap.html (2579B)


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