text: // Editor, copyright (c) by Marijn Haverbeke and others
  // Distributed under an MIT license: http://codemirror.net/LICENSE
  
  (function(mod) {
    if (typeof exports == "object" && typeof module == "object") // CommonJS
      mod(require("../../lib/codemirror"));
    else if (typeof define == "function" && define.amd) // AMD
      define(["../../lib/codemirror"], mod);
    else // Plain browser env
      mod(Editor);
  })(function(Editor) {
  "use strict";
  
  Editor.registerHelper("fold", "indent", function(cm, start) {
    var tabSize = cm.getOption("tabSize"), firstLine = cm.getLine(start.line);
    if (!/\S/.test(firstLine)) return;
    var getIndent = function(line) {
      return Editor.countColumn(line, null, tabSize);
    };
    var myIndent = getIndent(firstLine);
    var lastLineInFold = null;
    // Go through lines until we find a line that definitely doesn't belong in
    // the block we're folding, or to the end.
    for (var i = start.line + 1, end = cm.lastLine(); i <= end; ++i) {
      var curLine = cm.getLine(i);
      var curIndent = getIndent(curLine);
      if (curIndent > myIndent) {
        // Lines with a greater indent are considered part of the block.
        lastLineInFold = i;
      } else if (!/\S/.test(curLine)) {
        // Empty lines might be breaks within the block we're trying to fold.
      } else {
        // A non-empty line at an indent equal to or less than ours marks the
        // start of another block.
        break;
      }
    }
    if (lastLineInFold) return {
      from: Editor.Pos(start.line, firstLine.length),
      to: Editor.Pos(lastLineInFold, cm.getLine(lastLineInFold).length)
    };
  });
  
  });
  