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.js"));
    else if (typeof define == "function" && define.amd) // AMD
      define(["../../lib/codemirror.js"], mod);
    else // Plain browser env
      mod(CodeMirror);
  })(function(CodeMirror) {
    "use strict";
  
    var noOptions = {};
    var nonWS = /[^\s\u00a0]/;
    var Pos = CodeMirror.Pos;
  
    function firstNonWS(str) {
      var found = str.search(nonWS);
      return found == -1 ? 0 : found;
    }
  
    CodeMirror.commands.toggleComment = function(cm) {
      cm.toggleComment();
    };
  
    CodeMirror.defineExtension("toggleComment", function(options) {
      if (!options) options = noOptions;
      var cm = this;
      var minLine = Infinity, ranges = this.listSelections(), mode = null;
      for (var i = ranges.length - 1; i >= 0; i--) {
        var from = ranges[i].from(), to = ranges[i].to();
        if (from.line >= minLine) continue;
        if (to.line >= minLine) to = Pos(minLine, 0);
        minLine = from.line;
        if (mode == null) {
          if (cm.uncomment(from, to, options)) mode = "un";
          else { cm.lineComment(from, to, options); mode = "line"; }
        } else if (mode == "un") {
          cm.uncomment(from, to, options);
        } else {
          cm.lineComment(from, to, options);
        }
      }
    });
  
    // Rough heuristic to try and detect lines that are part of multi-line string
    function probablyInsideString(cm, pos, line) {
      return /\bstring\b/.test(cm.getTokenTypeAt(Pos(pos.line, 0))) && !/^[\'\"`]/.test(line)
    }
  
    CodeMirror.defineExtension("lineComment", function(from, to, options) {
      if (!options) options = noOptions;
      var self = this, mode = self.getModeAt(from);
      var firstLine = self.getLine(from.line);
      if (firstLine == null || probablyInsideString(self, from, firstLine)) return;
  
      var commentString = options.lineComment || mode.lineComment;
      if (!commentString) {
        if (options.blockCommentStart || mode.blockCommentStart) {
          options.fullLines = true;
          self.blockComment(from, to, options);
        }
        return;
      }
  
      var end = Math.min(to.ch != 0 || to.line == from.line ? to.line + 1 : to.line, self.lastLine() + 1);
      var pad = options.padding == null ? " " : options.padding;
      var blankLines = options.commentBlankLines || from.line == to.line;
  
      self.operation(function() {
        if (options.indent) {
          var baseString = null;
          for (var i = from.line; i < end; ++i) {
            var line = self.getLine(i);
            var whitespace = line.slice(0, firstNonWS(line));
            if (baseString == null || baseString.length > whitespace.length) {
              baseString = whitespace;
            }
          }
          for (var i = from.line; i < end; ++i) {
            var line = self.getLine(i), cut = baseString.length;
            if (!blankLines && !nonWS.test(line)) continue;
            if (line.slice(0, cut) != baseString) cut = firstNonWS(line);
            self.replaceRange(baseString + commentString + pad, Pos(i, 0), Pos(i, cut));
          }
        } else {
          for (var i = from.line; i < end; ++i) {
            if (blankLines || nonWS.test(self.getLine(i)))
              self.replaceRange(commentString + pad, Pos(i, 0));
          }
        }
      });
    });
  
    CodeMirror.defineExtension("blockComment", function(from, to, options) {
      if (!options) options = noOptions;
      var self = this, mode = self.getModeAt(from);
      var startString = options.blockCommentStart || mode.blockCommentStart;
      var endString = options.blockCommentEnd || mode.blockCommentEnd;
      if (!startString || !endString) {
        if ((options.lineComment || mode.lineComment) && options.fullLines != false)
          self.lineComment(from, to, options);
        return;
      }
  
      var end = Math.min(to.line, self.lastLine());
      if (end != from.line && to.ch == 0 && nonWS.test(self.getLine(end))) --end;
  
      var pad = options.padding == null ? " " : options.padding;
      if (from.line > end) return;
  
      self.operation(function() {
        if (options.fullLines != false) {
          var lastLineHasText = nonWS.test(self.getLine(end));
          self.replaceRange(pad + endString, Pos(end));
          self.replaceRange(startString + pad, Pos(from.line, 0));
          var lead = options.blockCommentLead || mode.blockCommentLead;
          if (lead != null) for (var i = from.line + 1; i <= end; ++i)
            if (i != end || lastLineHasText)
              self.replaceRange(lead + pad, Pos(i, 0));
        } else {
          self.replaceRange(endString, to);
          self.replaceRange(startString, from);
        }
      });
    });
  
    CodeMirror.defineExtension("uncomment", function(from, to, options) {
      if (!options) options = noOptions;
      var self = this, mode = self.getModeAt(from);
      var end = Math.min(to.ch != 0 || to.line == from.line ? to.line : to.line - 1, self.lastLine()), start = Math.min(from.line, end);
  
      // Try finding line comments
      var lineString = options.lineComment || mode.lineComment, lines = [];
      var pad = options.padding == null ? " " : options.padding, didSomething;
      lineComment: {
        if (!lineString) break lineComment;
        for (var i = start; i <= end; ++i) {
          var line = self.getLine(i);
          var found = line.indexOf(lineString);
          if (found > -1 && !/comment/.test(self.getTokenTypeAt(Pos(i, found + 1)))) found = -1;
          if (found == -1 && (i != end || i == start) && nonWS.test(line)) break lineComment;
          if (found > -1 && nonWS.test(line.slice(0, found))) break lineComment;
          lines.push(line);
        }
        self.operation(function() {
          for (var i = start; i <= end; ++i) {
            var line = lines[i - start];
            var pos = line.indexOf(lineString), endPos = pos + lineString.length;
            if (pos < 0) continue;
            if (line.slice(endPos, endPos + pad.length) == pad) endPos += pad.length;
            didSomething = true;
            self.replaceRange("", Pos(i, pos), Pos(i, endPos));
          }
        });
        if (didSomething) return true;
      }
  
      // Try block comments
      var startString = options.blockCommentStart || mode.blockCommentStart;
      var endString = options.blockCommentEnd || mode.blockCommentEnd;
      if (!startString || !endString) return false;
      var lead = options.blockCommentLead || mode.blockCommentLead;
      var startLine = self.getLine(start), endLine = end == start ? startLine : self.getLine(end);
      var open = startLine.indexOf(startString), close = endLine.lastIndexOf(endString);
      if (close == -1 && start != end) {
        endLine = self.getLine(--end);
        close = endLine.lastIndexOf(endString);
      }
      if (open == -1 || close == -1 ||
          !/comment/.test(self.getTokenTypeAt(Pos(start, open + 1))) ||
          !/comment/.test(self.getTokenTypeAt(Pos(end, close + 1))))
        return false;
  
      // Avoid killing block comments completely outside the selection.
      // Positions of the last startString before the start of the selection, and the first endString after it.
      var lastStart = startLine.lastIndexOf(startString, from.ch);
      var firstEnd = lastStart == -1 ? -1 : startLine.slice(0, from.ch).indexOf(endString, lastStart + startString.length);
      if (lastStart != -1 && firstEnd != -1 && firstEnd + endString.length != from.ch) return false;
      // Positions of the first endString after the end of the selection, and the last startString before it.
      firstEnd = endLine.indexOf(endString, to.ch);
      var almostLastStart = endLine.slice(to.ch).lastIndexOf(startString, firstEnd - to.ch);
      lastStart = (firstEnd == -1 || almostLastStart == -1) ? -1 : to.ch + almostLastStart;
      if (firstEnd != -1 && lastStart != -1 && lastStart != to.ch) return false;
  
      self.operation(function() {
        self.replaceRange("", Pos(end, close - (pad && endLine.slice(close - pad.length, close) == pad ? pad.length : 0)),
                          Pos(end, close + endString.length));
        var openEnd = open + startString.length;
        if (pad && startLine.slice(openEnd, openEnd + pad.length) == pad) openEnd += pad.length;
        self.replaceRange("", Pos(start, open), Pos(start, openEnd));
        if (lead) for (var i = start + 1; i <= end; ++i) {
          var line = self.getLine(i), found = line.indexOf(lead);
          if (found == -1 || nonWS.test(line.slice(0, found))) continue;
          var foundEnd = found + lead.length;
          if (pad && line.slice(foundEnd, foundEnd + pad.length) == pad) foundEnd += pad.length;
          self.replaceRange("", Pos(i, found), Pos(i, foundEnd));
        }
      });
      return true;
    });
  });
  