// CodeMirror, copyright © by Marijn Haverbeke and others // Distributed under an MIT license: 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.defineMode(“ruby”, function(config) {

function wordObj(words) {
  var o = {};
  for (var i = 0, e = words.length; i < e; ++i) o[words[i]] = true;
  return o;
}
var keywords = wordObj([
  "alias", "and", "BEGIN", "begin", "break", "case", "class", "def", "defined?", "do", "else",
  "elsif", "END", "end", "ensure", "false", "for", "if", "in", "module", "next", "not", "or",
  "redo", "rescue", "retry", "return", "self", "super", "then", "true", "undef", "unless",
  "until", "when", "while", "yield", "nil", "raise", "throw", "catch", "fail", "loop", "callcc",
  "caller", "lambda", "proc", "public", "protected", "private", "require", "load",
  "require_relative", "extend", "autoload", "__END__", "__FILE__", "__LINE__", "__dir__"
]);
var indentWords = wordObj(["def", "class", "case", "for", "while", "until", "module", "then",
                           "catch", "loop", "proc", "begin"]);
var dedentWords = wordObj(["end", "until"]);
var matching = {"[": "]", "{": "}", "(": ")"};
var curPunc;

function chain(newtok, stream, state) {
  state.tokenize.push(newtok);
  return newtok(stream, state);
}

function tokenBase(stream, state) {
  if (stream.sol() && stream.match("=begin") && stream.eol()) {
    state.tokenize.push(readBlockComment);
    return "comment";
  }
  if (stream.eatSpace()) return null;
  var ch = stream.next(), m;
  if (ch == "`" || ch == "'" || ch == '"') {
    return chain(readQuoted(ch, "string", ch == '"' || ch == "`"), stream, state);
  } else if (ch == "/") {
    if (regexpAhead(stream))
      return chain(readQuoted(ch, "string-2", true), stream, state);
    else
      return "operator";
  } else if (ch == "%") {
    var style = "string", embed = true;
    if (stream.eat("s")) style = "atom";
    else if (stream.eat(/[WQ]/)) style = "string";
    else if (stream.eat(/[r]/)) style = "string-2";
    else if (stream.eat(/[wxq]/)) { style = "string"; embed = false; }
    var delim = stream.eat(/[^\w\s=]/);
    if (!delim) return "operator";
    if (matching.propertyIsEnumerable(delim)) delim = matching[delim];
    return chain(readQuoted(delim, style, embed, true), stream, state);
  } else if (ch == "#") {
    stream.skipToEnd();
    return "comment";
  } else if (ch == "<" && (m = stream.match(/^<-?[\`\"\']?([a-zA-Z_?]\w*)[\`\"\']?(?:;|$)/))) {
    return chain(readHereDoc(m[1]), stream, state);
  } else if (ch == "0") {
    if (stream.eat("x")) stream.eatWhile(/[\da-fA-F]/);
    else if (stream.eat("b")) stream.eatWhile(/[01]/);
    else stream.eatWhile(/[0-7]/);
    return "number";
  } else if (/\d/.test(ch)) {
    stream.match(/^[\d_]*(?:\.[\d_]+)?(?:[eE][+\-]?[\d_]+)?/);
    return "number";
  } else if (ch == "?") {
    while (stream.match(/^\\[CM]-/)) {}
    if (stream.eat("\\")) stream.eatWhile(/\w/);
    else stream.next();
    return "string";
  } else if (ch == ":") {
    if (stream.eat("'")) return chain(readQuoted("'", "atom", false), stream, state);
    if (stream.eat('"')) return chain(readQuoted('"', "atom", true), stream, state);

    // :> :>> :< :<< are valid symbols
    if (stream.eat(/[\<\>]/)) {
      stream.eat(/[\<\>]/);
      return "atom";
    }

    // :+ :- :/ :* :| :& :! are valid symbols
    if (stream.eat(/[\+\-\*\/\&\|\:\!]/)) {
      return "atom";
    }

    // Symbols can't start by a digit
    if (stream.eat(/[a-zA-Z$@_\xa1-\uffff]/)) {
      stream.eatWhile(/[\w$\xa1-\uffff]/);
      // Only one ? ! = is allowed and only as the last character
      stream.eat(/[\?\!\=]/);
      return "atom";
    }
    return "operator";
  } else if (ch == "@" && stream.match(/^@?[a-zA-Z_\xa1-\uffff]/)) {
    stream.eat("@");
    stream.eatWhile(/[\w\xa1-\uffff]/);
    return "variable-2";
  } else if (ch == "$") {
    if (stream.eat(/[a-zA-Z_]/)) {
      stream.eatWhile(/[\w]/);
    } else if (stream.eat(/\d/)) {
      stream.eat(/\d/);
    } else {
      stream.next(); // Must be a special global like $: or $!
    }
    return "variable-3";
  } else if (/[a-zA-Z_\xa1-\uffff]/.test(ch)) {
    stream.eatWhile(/[\w\xa1-\uffff]/);
    stream.eat(/[\?\!]/);
    if (stream.eat(":")) return "atom";
    return "ident";
  } else if (ch == "|" && (state.varList || state.lastTok == "{" || state.lastTok == "do")) {
    curPunc = "|";
    return null;
  } else if (/[\(\)\[\]{}\\;]/.test(ch)) {
    curPunc = ch;
    return null;
  } else if (ch == "-" && stream.eat(">")) {
    return "arrow";
  } else if (/[=+\-\/*:\.^%<>~|]/.test(ch)) {
    var more = stream.eatWhile(/[=+\-\/*:\.^%<>~|]/);
    if (ch == "." && !more) curPunc = ".";
    return "operator";
  } else {
    return null;
  }
}

function regexpAhead(stream) {
  var start = stream.pos, depth = 0, next, found = false, escaped = false
  while ((next = stream.next()) != null) {
    if (!escaped) {
      if ("[{(".indexOf(next) > -1) {
        depth++
      } else if ("]})".indexOf(next) > -1) {
        depth--
        if (depth < 0) break
      } else if (next == "/" && depth == 0) {
        found = true
        break
      }
      escaped = next == "\\"
    } else {
      escaped = false
    }
  }
  stream.backUp(stream.pos - start)
  return found
}

function tokenBaseUntilBrace(depth) {
  if (!depth) depth = 1;
  return function(stream, state) {
    if (stream.peek() == "}") {
      if (depth == 1) {
        state.tokenize.pop();
        return state.tokenize[state.tokenize.length-1](stream, state);
      } else {
        state.tokenize[state.tokenize.length - 1] = tokenBaseUntilBrace(depth - 1);
      }
    } else if (stream.peek() == "{") {
      state.tokenize[state.tokenize.length - 1] = tokenBaseUntilBrace(depth + 1);
    }
    return tokenBase(stream, state);
  };
}
function tokenBaseOnce() {
  var alreadyCalled = false;
  return function(stream, state) {
    if (alreadyCalled) {
      state.tokenize.pop();
      return state.tokenize[state.tokenize.length-1](stream, state);
    }
    alreadyCalled = true;
    return tokenBase(stream, state);
  };
}
function readQuoted(quote, style, embed, unescaped) {
  return function(stream, state) {
    var escaped = false, ch;

    if (state.context.type === 'read-quoted-paused') {
      state.context = state.context.prev;
      stream.eat("}");
    }

    while ((ch = stream.next()) != null) {
      if (ch == quote && (unescaped || !escaped)) {
        state.tokenize.pop();
        break;
      }
      if (embed && ch == "#" && !escaped) {
        if (stream.eat("{")) {
          if (quote == "}") {
            state.context = {prev: state.context, type: 'read-quoted-paused'};
          }
          state.tokenize.push(tokenBaseUntilBrace());
          break;
        } else if (/[@\$]/.test(stream.peek())) {
          state.tokenize.push(tokenBaseOnce());
          break;
        }
      }
      escaped = !escaped && ch == "\\";
    }
    return style;
  };
}
function readHereDoc(phrase) {
  return function(stream, state) {
    if (stream.match(phrase)) state.tokenize.pop();
    else stream.skipToEnd();
    return "string";
  };
}
function readBlockComment(stream, state) {
  if (stream.sol() && stream.match("=end") && stream.eol())
    state.tokenize.pop();
  stream.skipToEnd();
  return "comment";
}

return {
  startState: function() {
    return {tokenize: [tokenBase],
            indented: 0,
            context: {type: "top", indented: -config.indentUnit},
            continuedLine: false,
            lastTok: null,
            varList: false};
  },

  token: function(stream, state) {
    curPunc = null;
    if (stream.sol()) state.indented = stream.indentation();
    var style = state.tokenize[state.tokenize.length-1](stream, state), kwtype;
    var thisTok = curPunc;
    if (style == "ident") {
      var word = stream.current();
      style = state.lastTok == "." ? "property"
        : keywords.propertyIsEnumerable(stream.current()) ? "keyword"
        : /^[A-Z]/.test(word) ? "tag"
        : (state.lastTok == "def" || state.lastTok == "class" || state.varList) ? "def"
        : "variable";
      if (style == "keyword") {
        thisTok = word;
        if (indentWords.propertyIsEnumerable(word)) kwtype = "indent";
        else if (dedentWords.propertyIsEnumerable(word)) kwtype = "dedent";
        else if ((word == "if" || word == "unless") && stream.column() == stream.indentation())
          kwtype = "indent";
        else if (word == "do" && state.context.indented < state.indented)
          kwtype = "indent";
      }
    }
    if (curPunc || (style && style != "comment")) state.lastTok = thisTok;
    if (curPunc == "|") state.varList = !state.varList;

    if (kwtype == "indent" || /[\(\[\{]/.test(curPunc))
      state.context = {prev: state.context, type: curPunc || style, indented: state.indented};
    else if ((kwtype == "dedent" || /[\)\]\}]/.test(curPunc)) && state.context.prev)
      state.context = state.context.prev;

    if (stream.eol())
      state.continuedLine = (curPunc == "\\" || style == "operator");
    return style;
  },

  indent: function(state, textAfter) {
    if (state.tokenize[state.tokenize.length-1] != tokenBase) return 0;
    var firstChar = textAfter && textAfter.charAt(0);
    var ct = state.context;
    var closing = ct.type == matching[firstChar] ||
      ct.type == "keyword" && /^(?:end|until|else|elsif|when|rescue)\b/.test(textAfter);
    return ct.indented + (closing ? 0 : config.indentUnit) +
      (state.continuedLine ? config.indentUnit : 0);
  },

  electricInput: /^\s*(?:end|rescue|elsif|else|\})$/,
  lineComment: "#"
};

});

CodeMirror.defineMIME(“text/x-ruby”, “ruby”);

});