CodeMirror.defineMode("xml", function(config, parserConfig) {
  var indentUnit = config.indentUnit;
  var multilineTagIndentFactor = parserConfig.multilineTagIndentFactor || 1;

  var Kludges = parserConfig.htmlMode ? {
    autoSelfClosers: {'area': true, 'base': true, 'br': true, 'col': true, 'command': true,
                      'embed': true, 'frame': true, 'hr': true, 'img': true, 'input': true,
                      'keygen': true, 'link': true, 'meta': true, 'param': true, 'source': true,
                      'track': true, 'wbr': true},
    implicitlyClosed: {'dd': true, 'li': true, 'optgroup': true, 'option': true, 'p': true,
                       'rp': true, 'rt': true, 'tbody': true, 'td': true, 'tfoot': true,
                       'th': true, 'tr': true},
    contextGrabbers: {
      'dd': {'dd': true, 'dt': true},
      'dt': {'dd': true, 'dt': true},
      'li': {'li': true},
      'option': {'option': true, 'optgroup': true},
      'optgroup': {'optgroup': true},
      'p': {'address': true, 'article': true, 'aside': true, 'blockquote': true, 'dir': true,
            'div': true, 'dl': true, 'fieldset': true, 'footer': true, 'form': true,
            'h1': true, 'h2': true, 'h3': true, 'h4': true, 'h5': true, 'h6': true,
            'header': true, 'hgroup': true, 'hr': true, 'menu': true, 'nav': true, 'ol': true,
            'p': true, 'pre': true, 'section': true, 'table': true, 'ul': true},
      'rp': {'rp': true, 'rt': true},
      'rt': {'rp': true, 'rt': true},
      'tbody': {'tbody': true, 'tfoot': true},
      'td': {'td': true, 'th': true},
      'tfoot': {'tbody': true},
      'th': {'td': true, 'th': true},
      'thead': {'tbody': true, 'tfoot': true},
      'tr': {'tr': true}
    },
    doNotIndent: {"pre": true},
    allowUnquoted: true,
    allowMissing: true
  } : {
    autoSelfClosers: {},
    implicitlyClosed: {},
    contextGrabbers: {},
    doNotIndent: {},
    allowUnquoted: false,
    allowMissing: false
  };
  var alignCDATA = parserConfig.alignCDATA;

  // Return variables for tokenizers
  var tagName, type;

  function inText(stream, state) {
    function chain(parser) {
      state.tokenize = parser;
      return parser(stream, state);
    }

    var ch = stream.next();
    if (ch == "<") {
      if (stream.eat("!")) {
        if (stream.eat("[")) {
          if (stream.match("CDATA[")) return chain(inBlock("atom", "]]>"));
          else return null;
        }
        else if (stream.match("--")) return chain(inBlock("comment", "-->"));
        else if (stream.match("DOCTYPE", true, true)) {
          stream.eatWhile(/[\w\._\-]/);
          return chain(doctype(1));
        }
        else return null;
      }
      else if (stream.eat("?")) {
        stream.eatWhile(/[\w\._\-]/);
        state.tokenize = inBlock("meta", "?>");
        return "meta";
      }
      else {
        var isClose = stream.eat("/");
        tagName = "";
        var c;
        while ((c = stream.eat(/[^\s\u00a0=<>\"\'\/?]/))) tagName += c;
        if (!tagName) return "error";
        type = isClose ? "closeTag" : "openTag";
        state.tokenize = inTag;
        return "tag";
      }
    }
    else if (ch == "&") {
      var ok;
      if (stream.eat("#")) {
        if (stream.eat("x")) {
          ok = stream.eatWhile(/[a-fA-F\d]/) && stream.eat(";");          
        } else {
          ok = stream.eatWhile(/[\d]/) && stream.eat(";");
        }
      } else {
        ok = stream.eatWhile(/[\w\.\-:]/) && stream.eat(";");
      }
      return ok ? "atom" : "error";
    }
    else {
      stream.eatWhile(/[^&<]/);
      return null;
    }
  }

  function inTag(stream, state) {
    var ch = stream.next();
    if (ch == ">" || (ch == "/" && stream.eat(">"))) {
      state.tokenize = inText;
      type = ch == ">" ? "endTag" : "selfcloseTag";
      return "tag";
    }
    else if (ch == "=") {
      type = "equals";
      return null;
    }
    else if (/[\'\"]/.test(ch)) {
      state.tokenize = inAttribute(ch);
      return state.tokenize(stream, state);
    }
    else {
      stream.eatWhile(/[^\s\u00a0=<>\"\']/);
      return "word";
    }
  }

  function inAttribute(quote) {
    return function(stream, state) {
      while (!stream.eol()) {
        if (stream.next() == quote) {
          state.tokenize = inTag;
          break;
        }
      }
      return "string";
    };
  }

  function inBlock(style, terminator) {
    return function(stream, state) {
      while (!stream.eol()) {
        if (stream.match(terminator)) {
          state.tokenize = inText;
          break;
        }
        stream.next();
      }
      return style;
    };
  }
  function doctype(depth) {
    return function(stream, state) {
      var ch;
      while ((ch = stream.next()) != null) {
        if (ch == "<") {
          state.tokenize = doctype(depth + 1);
          return state.tokenize(stream, state);
        } else if (ch == ">") {
          if (depth == 1) {
            state.tokenize = inText;
            break;
          } else {
            state.tokenize = doctype(depth - 1);
            return state.tokenize(stream, state);
          }
        }
      }
      return "meta";
    };
  }

  var curState, curStream, setStyle;
  function pass() {
    for (var i = arguments.length - 1; i >= 0; i--) curState.cc.push(arguments[i]);
  }
  function cont() {
    pass.apply(null, arguments);
    return true;
  }

  function pushContext(tagName, startOfLine) {
    var noIndent = Kludges.doNotIndent.hasOwnProperty(tagName) || (curState.context && curState.context.noIndent);
    curState.context = {
      prev: curState.context,
      tagName: tagName,
      indent: curState.indented,
      startOfLine: startOfLine,
      noIndent: noIndent
    };
  }
  function popContext() {
    if (curState.context) curState.context = curState.context.prev;
  }

  function element(type) {
    if (type == "openTag") {
      curState.tagName = tagName;
      curState.tagStart = curStream.column();
      return cont(attributes, endtag(curState.startOfLine));
    } else if (type == "closeTag") {
      var err = false;
      if (curState.context) {
        if (curState.context.tagName != tagName) {
          if (Kludges.implicitlyClosed.hasOwnProperty(curState.context.tagName.toLowerCase())) {
            popContext();
          }
          err = !curState.context || curState.context.tagName != tagName;
        }
      } else {
        err = true;
      }
      if (err) setStyle = "error";
      return cont(endclosetag(err));
    }
    return cont();
  }
  function endtag(startOfLine) {
    return function(type) {
      var tagName = curState.tagName;
      curState.tagName = curState.tagStart = null;
      if (type == "selfcloseTag" ||
          (type == "endTag" && Kludges.autoSelfClosers.hasOwnProperty(tagName.toLowerCase()))) {
        maybePopContext(tagName.toLowerCase());
        return cont();
      }
      if (type == "endTag") {
        maybePopContext(tagName.toLowerCase());
        pushContext(tagName, startOfLine);
        return cont();
      }
      return cont();
    };
  }
  function endclosetag(err) {
    return function(type) {
      if (err) setStyle = "error";
      if (type == "endTag") { popContext(); return cont(); }
      setStyle = "error";
      return cont(arguments.callee);
    };
  }
  function maybePopContext(nextTagName) {
    var parentTagName;
    while (true) {
      if (!curState.context) {
        return;
      }
      parentTagName = curState.context.tagName.toLowerCase();
      if (!Kludges.contextGrabbers.hasOwnProperty(parentTagName) ||
          !Kludges.contextGrabbers[parentTagName].hasOwnProperty(nextTagName)) {
        return;
      }
      popContext();
    }
  }

  function attributes(type) {
    if (type == "word") {setStyle = "attribute"; return cont(attribute, attributes);}
    if (type == "endTag" || type == "selfcloseTag") return pass();
    setStyle = "error";
    return cont(attributes);
  }
  function attribute(type) {
    if (type == "equals") return cont(attvalue, attributes);
    if (!Kludges.allowMissing) setStyle = "error";
    else if (type == "word") setStyle = "attribute";
    return (type == "endTag" || type == "selfcloseTag") ? pass() : cont();
  }
  function attvalue(type) {
    if (type == "string") return cont(attvaluemaybe);
    if (type == "word" && Kludges.allowUnquoted) {setStyle = "string"; return cont();}
    setStyle = "error";
    return (type == "endTag" || type == "selfCloseTag") ? pass() : cont();
  }
  function attvaluemaybe(type) {
    if (type == "string") return cont(attvaluemaybe);
    else return pass();
  }

  return {
    startState: function() {
      return {tokenize: inText, cc: [], indented: 0, startOfLine: true, tagName: null, tagStart: null, context: null};
    },

    token: function(stream, state) {
      if (!state.tagName && stream.sol()) {
        state.startOfLine = true;
        state.indented = stream.indentation();
      }
      if (stream.eatSpace()) return null;

      setStyle = type = tagName = null;
      var style = state.tokenize(stream, state);
      state.type = type;
      if ((style || type) && style != "comment") {
        curState = state; curStream = stream;
        while (true) {
          var comb = state.cc.pop() || element;
          if (comb(type || style)) break;
        }
      }
      state.startOfLine = false;
      return setStyle || style;
    },

    indent: function(state, textAfter, fullLine) {
      var context = state.context;
      if ((state.tokenize != inTag && state.tokenize != inText) ||
          context && context.noIndent)
        return fullLine ? fullLine.match(/^(\s*)/)[0].length : 0;
      if (state.tagName) return state.tagStart + indentUnit * multilineTagIndentFactor;
      if (alignCDATA && /<!\[CDATA\[/.test(textAfter)) return 0;
      if (context && /^<\//.test(textAfter))
        context = context.prev;
      while (context && !context.startOfLine)
        context = context.prev;
      if (context) return context.indent + indentUnit;
      else return 0;
    },

    electricChars: "/",

    configuration: parserConfig.htmlMode ? "html" : "xml"
  };
});

CodeMirror.defineMIME("text/xml", "xml");
CodeMirror.defineMIME("application/xml", "xml");
if (!CodeMirror.mimeModes.hasOwnProperty("text/html"))
  CodeMirror.defineMIME("text/html", {name: "xml", htmlMode: true});
