text: // CodeMirror, 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(CodeMirror);
  })(function(CodeMirror) {
  "use strict";
  
  CodeMirror.registerHelper("fold", "brace", function(cm, start) {
    var line = start.line, lineText = cm.getLine(line);
    var startCh, tokenType;
  
    function findOpening(openCh) {
      for (var at = start.ch, pass = 0;;) {
        var found = at <= 0 ? -1 : lineText.lastIndexOf(openCh, at - 1);
        if (found == -1) {
          if (pass == 1) break;
          pass = 1;
          at = lineText.length;
          continue;
        }
        if (pass == 1 && found < start.ch) break;
        tokenType = cm.getTokenTypeAt(CodeMirror.Pos(line, found + 1));
        if (!/^(comment|string)/.test(tokenType)) return found + 1;
        at = found - 1;
      }
    }
  
    var startToken = "{", endToken = "}", startCh = findOpening("{");
    if (startCh == null) {
      startToken = "[", endToken = "]";
      startCh = findOpening("[");
    }
  
    if (startCh == null) return;
    var count = 1, lastLine = cm.lastLine(), end, endCh;
    outer: for (var i = line; i <= lastLine; ++i) {
      var text = cm.getLine(i), pos = i == line ? startCh : 0;
      for (;;) {
        var nextOpen = text.indexOf(startToken, pos), nextClose = text.indexOf(endToken, pos);
        if (nextOpen < 0) nextOpen = text.length;
        if (nextClose < 0) nextClose = text.length;
        pos = Math.min(nextOpen, nextClose);
        if (pos == text.length) break;
        if (cm.getTokenTypeAt(CodeMirror.Pos(i, pos + 1)) == tokenType) {
          if (pos == nextOpen) ++count;
          else if (!--count) { end = i; endCh = pos; break outer; }
        }
        ++pos;
      }
    }
    if (end == null || line == end && endCh == startCh) return;
    return {from: CodeMirror.Pos(line, startCh),
            to: CodeMirror.Pos(end, endCh)};
  });
  
  CodeMirror.registerHelper("fold", "import", function(cm, start) {
    function hasImport(line) {
      if (line < cm.firstLine() || line > cm.lastLine()) return null;
      var start = cm.getTokenAt(CodeMirror.Pos(line, 1));
      if (!/\S/.test(start.string)) start = cm.getTokenAt(CodeMirror.Pos(line, start.end + 1));
      if (start.type != "keyword" || start.string != "import") return null;
      // Now find closing semicolon, return its position
      for (var i = line, e = Math.min(cm.lastLine(), line + 10); i <= e; ++i) {
        var text = cm.getLine(i), semi = text.indexOf(";");
        if (semi != -1) return {startCh: start.end, end: CodeMirror.Pos(i, semi)};
      }
    }
  
    var start = start.line, has = hasImport(start), prev;
    if (!has || hasImport(start - 1) || ((prev = hasImport(start - 2)) && prev.end.line == start - 1))
      return null;
    for (var end = has.end;;) {
      var next = hasImport(end.line + 1);
      if (next == null) break;
      end = next.end;
    }
    return {from: cm.clipPos(CodeMirror.Pos(start, has.startCh + 1)), to: end};
  });
  
  CodeMirror.registerHelper("fold", "include", function(cm, start) {
    function hasInclude(line) {
      if (line < cm.firstLine() || line > cm.lastLine()) return null;
      var start = cm.getTokenAt(CodeMirror.Pos(line, 1));
      if (!/\S/.test(start.string)) start = cm.getTokenAt(CodeMirror.Pos(line, start.end + 1));
      if (start.type == "meta" && start.string.slice(0, 8) == "#include") return start.start + 8;
    }
  
    var start = start.line, has = hasInclude(start);
    if (has == null || hasInclude(start - 1) != null) return null;
    for (var end = start;;) {
      var next = hasInclude(end + 1);
      if (next == null) break;
      ++end;
    }
    return {from: CodeMirror.Pos(start, has + 1),
            to: cm.clipPos(CodeMirror.Pos(end))};
  });
  
  });
  