Codemirror Auto Format after setValue

Question

http://liveweave.com/UxEJ0s

I'm using Codemirror for my app.

I noticed if I select all the text and press SHIFT+Tab it will auto align my code making it easier to read.

Here's an example of what my app currently renders...

<ul>
<li>
<font color="#f90000">
  Apples
</font>
</li>
<li>
<font color="#ff9a3d">
  Oranges
</font>
</li>
</ul>

Here's what I'm trying to get it to render.

<ul>
  <li>
    <font color="#f90000">
      Apples
    </font>
  </li>
  <li>
    <font color="#ff9a3d">
      Oranges
    </font>
  </li>
</ul>

EDIT:

Does anyone know if there's a way to do this without selecting the whole code manually in Codemirror?

Why? I have Codemirror running in my background of my app all code that's added is added dynamically, but when I save the final code it looks like above.

Any help is greatly appreciated.

Answer 1

autoFormatRange was removed from codemirror, so we should use another way, register our own extension:

1. generate js

Go to js generator (just an easy way to get minified js with plugins and custom extensions). http://codemirror.net/doc/compress.html

Updated link for version 3: http://codemirror.net/3/doc/compress.html

2. Select options desired

Paste custom extension code and press "Compress" button.

CodeMirror.defineExtension("autoFormatRange", function (from, to) {
    var cm = this;
    var outer = cm.getMode(), text = cm.getRange(from, to).split("\n");
    var state = CodeMirror.copyState(outer, cm.getTokenAt(from).state);
    var tabSize = cm.getOption("tabSize");

    var out = "", lines = 0, atSol = from.ch == 0;
    function newline() {
        out += "\n";
        atSol = true;
        ++lines;
    }

    for (var i = 0; i < text.length; ++i) {
        var stream = new CodeMirror.StringStream(text[i], tabSize);
        while (!stream.eol()) {
            var inner = CodeMirror.innerMode(outer, state);
            var style = outer.token(stream, state), cur = stream.current();
            stream.start = stream.pos;
            if (!atSol || /\S/.test(cur)) {
                out += cur;
                atSol = false;
            }
            if (!atSol && inner.mode.newlineAfterToken &&
                inner.mode.newlineAfterToken(style, cur, stream.string.slice(stream.pos) || text[i+1] || "", inner.state))
                newline();
        }
        if (!stream.pos && outer.blankLine) outer.blankLine(state);
        if (!atSol) newline();
    }

    cm.operation(function () {
        cm.replaceRange(out, from, to);
        for (var cur = from.line + 1, end = from.line + lines; cur <= end; ++cur)
            cm.indentLine(cur, "smart");
    });
});

// Applies automatic mode-aware indentation to the specified range
CodeMirror.defineExtension("autoIndentRange", function (from, to) {
    var cmInstance = this;
    this.operation(function () {
        for (var i = from.line; i <= to.line; i++) {
            cmInstance.indentLine(i, "smart");
        }
    });
});

3. Use generated .js as follows

Html:

<textarea id=code><?=$value?></textarea>

<link rel="stylesheet" href="/codemirror/codemirror.css">
<script src="/codemirror/codemirror-compressed.js"></script>
<script>
var editor = CodeMirror.fromTextArea(document.getElementById('code'), {
    lineNumbers: true,
    mode: "text/html"
});
var totalLines = editor.lineCount();  
editor.autoFormatRange({line:0, ch:0}, {line:totalLines});
</script>

Code was found here