text: // This is an ipython mode for CodeMirror. We started from the CM Python mode and renamed
  // it to ipython. We have then marked all other changes we have made to the file.
  
  CodeMirror.defineMode("ipython", function(conf, parserConf) {
      var ERRORCLASS = 'error';
  
      function wordRegexp(words) {
          return new RegExp("^((" + words.join(")|(") + "))\\b");
      }
  
  	// IPython-specific changes: add '?' as recognized character using \\?
      var singleOperators = parserConf.singleOperators || new RegExp("^[\\+\\-\\*/%&|\\^~<>!\\?]");
  	// End IPython changes.
      var singleDelimiters = parserConf.singleDelimiters || new RegExp('^[\\(\\)\\[\\]\\{\\}@,:`=;\\.]');
      var doubleOperators = parserConf.doubleOperators || new RegExp("^((==)|(!=)|(<=)|(>=)|(<>)|(<<)|(>>)|(//)|(\\*\\*))");
      var doubleDelimiters = parserConf.doubleDelimiters || new RegExp("^((\\+=)|(\\-=)|(\\*=)|(%=)|(/=)|(&=)|(\\|=)|(\\^=))");
      var tripleDelimiters = parserConf.tripleDelimiters || new RegExp("^((//=)|(>>=)|(<<=)|(\\*\\*=))");
      var identifiers = parserConf.identifiers|| new RegExp("^[_A-Za-z][_A-Za-z0-9]*");
  
      var wordOperators = wordRegexp(['and', 'or', 'not', 'is', 'in']);
      var commonkeywords = ['as', 'assert', 'break', 'class', 'continue',
                            'def', 'del', 'elif', 'else', 'except', 'finally',
                            'for', 'from', 'global', 'if', 'import',
                            'lambda', 'pass', 'raise', 'return',
                            'try', 'while', 'with', 'yield'];
      var commonBuiltins = ['abs', 'all', 'any', 'bin', 'bool', 'bytearray', 'callable', 'chr',
                            'classmethod', 'compile', 'complex', 'delattr', 'dict', 'dir', 'divmod',
                            'enumerate', 'eval', 'filter', 'float', 'format', 'frozenset',
                            'getattr', 'globals', 'hasattr', 'hash', 'help', 'hex', 'id',
                            'input', 'int', 'isinstance', 'issubclass', 'iter', 'len',
                            'list', 'locals', 'map', 'max', 'memoryview', 'min', 'next',
                            'object', 'oct', 'open', 'ord', 'pow', 'property', 'range',
                            'repr', 'reversed', 'round', 'set', 'setattr', 'slice',
                            'sorted', 'staticmethod', 'str', 'sum', 'super', 'tuple',
                            'type', 'vars', 'zip', '__import__', 'NotImplemented',
                            'Ellipsis', '__debug__'];
      var py2 = {'builtins': ['apply', 'basestring', 'buffer', 'cmp', 'coerce', 'execfile',
                              'file', 'intern', 'long', 'raw_input', 'reduce', 'reload',
                              'unichr', 'unicode', 'xrange', 'False', 'True', 'None'],
                 'keywords': ['exec', 'print']};
      var py3 = {'builtins': ['ascii', 'bytes', 'exec', 'print'],
                 'keywords': ['nonlocal', 'False', 'True', 'None']};
  
      if (!!parserConf.version && parseInt(parserConf.version, 10) === 3) {
          commonkeywords = commonkeywords.concat(py3.keywords);
          commonBuiltins = commonBuiltins.concat(py3.builtins);
          var stringPrefixes = new RegExp("^(([rb]|(br))?('{3}|\"{3}|['\"]))", "i");
      } else {
          commonkeywords = commonkeywords.concat(py2.keywords);
          commonBuiltins = commonBuiltins.concat(py2.builtins);
          var stringPrefixes = new RegExp("^(([rub]|(ur)|(br))?('{3}|\"{3}|['\"]))", "i");
      }
      var keywords = wordRegexp(commonkeywords);
      var builtins = wordRegexp(commonBuiltins);
  
      var indentInfo = null;
  
      // tokenizers
      function tokenBase(stream, state) {
          // Handle scope changes
          if (stream.sol()) {
              var scopeOffset = state.scopes[0].offset;
              if (stream.eatSpace()) {
                  var lineOffset = stream.indentation();
                  if (lineOffset > scopeOffset) {
                      indentInfo = 'indent';
                  } else if (lineOffset < scopeOffset) {
                      indentInfo = 'dedent';
                  }
                  return null;
              } else {
                  if (scopeOffset > 0) {
                      dedent(stream, state);
                  }
              }
          }
          if (stream.eatSpace()) {
              return null;
          }
  
          var ch = stream.peek();
  
          // Handle Comments
          if (ch === '#') {
              stream.skipToEnd();
              return 'comment';
          }
  
          // Handle Number Literals
          if (stream.match(/^[0-9\.]/, false)) {
              var floatLiteral = false;
              // Floats
              if (stream.match(/^\d*\.\d+(e[\+\-]?\d+)?/i)) { floatLiteral = true; }
              if (stream.match(/^\d+\.\d*/)) { floatLiteral = true; }
              if (stream.match(/^\.\d+/)) { floatLiteral = true; }
              if (floatLiteral) {
                  // Float literals may be "imaginary"
                  stream.eat(/J/i);
                  return 'number';
              }
              // Integers
              var intLiteral = false;
              // Hex
              if (stream.match(/^0x[0-9a-f]+/i)) { intLiteral = true; }
              // Binary
              if (stream.match(/^0b[01]+/i)) { intLiteral = true; }
              // Octal
              if (stream.match(/^0o[0-7]+/i)) { intLiteral = true; }
              // Decimal
              if (stream.match(/^[1-9]\d*(e[\+\-]?\d+)?/)) {
                  // Decimal literals may be "imaginary"
                  stream.eat(/J/i);
                  // TODO - Can you have imaginary longs?
                  intLiteral = true;
              }
              // Zero by itself with no other piece of number.
              if (stream.match(/^0(?![\dx])/i)) { intLiteral = true; }
              if (intLiteral) {
                  // Integer literals may be "long"
                  stream.eat(/L/i);
                  return 'number';
              }
          }
  
          // Handle Strings
          if (stream.match(stringPrefixes)) {
              state.tokenize = tokenStringFactory(stream.current());
              return state.tokenize(stream, state);
          }
  
          // Handle operators and Delimiters
          if (stream.match(tripleDelimiters) || stream.match(doubleDelimiters)) {
              return null;
          }
          if (stream.match(doubleOperators)
              || stream.match(singleOperators)
              || stream.match(wordOperators)) {
              return 'operator';
          }
          if (stream.match(singleDelimiters)) {
              return null;
          }
  
          if (stream.match(keywords)) {
              return 'keyword';
          }
  
          if (stream.match(builtins)) {
              return 'builtin';
          }
  
          if (stream.match(identifiers)) {
              return 'variable';
          }
  
          // Handle non-detected items
          stream.next();
          return ERRORCLASS;
      }
  
      function tokenStringFactory(delimiter) {
          while ('rub'.indexOf(delimiter.charAt(0).toLowerCase()) >= 0) {
              delimiter = delimiter.substr(1);
          }
          var singleline = delimiter.length == 1;
          var OUTCLASS = 'string';
  
          function tokenString(stream, state) {
              while (!stream.eol()) {
                  stream.eatWhile(/[^'"\\]/);
                  if (stream.eat('\\')) {
                      stream.next();
                      if (singleline && stream.eol()) {
                          return OUTCLASS;
                      }
                  } else if (stream.match(delimiter)) {
                      state.tokenize = tokenBase;
                      return OUTCLASS;
                  } else {
                      stream.eat(/['"]/);
                  }
              }
              if (singleline) {
                  if (parserConf.singleLineStringErrors) {
                      return ERRORCLASS;
                  } else {
                      state.tokenize = tokenBase;
                  }
              }
              return OUTCLASS;
          }
          tokenString.isString = true;
          return tokenString;
      }
  
      function indent(stream, state, type) {
          type = type || 'py';
          var indentUnit = 0;
          if (type === 'py') {
              if (state.scopes[0].type !== 'py') {
                  state.scopes[0].offset = stream.indentation();
                  return;
              }
              for (var i = 0; i < state.scopes.length; ++i) {
                  if (state.scopes[i].type === 'py') {
                      indentUnit = state.scopes[i].offset + conf.indentUnit;
                      break;
                  }
              }
          } else {
              indentUnit = stream.column() + stream.current().length;
          }
          state.scopes.unshift({
              offset: indentUnit,
              type: type
          });
      }
  
      function dedent(stream, state, type) {
          type = type || 'py';
          if (state.scopes.length == 1) return;
          if (state.scopes[0].type === 'py') {
              var _indent = stream.indentation();
              var _indent_index = -1;
              for (var i = 0; i < state.scopes.length; ++i) {
                  if (_indent === state.scopes[i].offset) {
                      _indent_index = i;
                      break;
                  }
              }
              if (_indent_index === -1) {
                  return true;
              }
              while (state.scopes[0].offset !== _indent) {
                  state.scopes.shift();
              }
              return false;
          } else {
              if (type === 'py') {
                  state.scopes[0].offset = stream.indentation();
                  return false;
              } else {
                  if (state.scopes[0].type != type) {
                      return true;
                  }
                  state.scopes.shift();
                  return false;
              }
          }
      }
  
      function tokenLexer(stream, state) {
          indentInfo = null;
          var style = state.tokenize(stream, state);
          var current = stream.current();
  
          // Handle '.' connected identifiers
          if (current === '.') {
              style = stream.match(identifiers, false) ? null : ERRORCLASS;
              if (style === null && state.lastToken === 'meta') {
                  // Apply 'meta' style to '.' connected identifiers when
                  // appropriate.
                  style = 'meta';
              }
              return style;
          }
  
          // Handle decorators
          if (current === '@') {
              return stream.match(identifiers, false) ? 'meta' : ERRORCLASS;
          }
  
          if ((style === 'variable' || style === 'builtin')
              && state.lastToken === 'meta') {
              style = 'meta';
          }
  
          // Handle scope changes.
          if (current === 'pass' || current === 'return') {
              state.dedent += 1;
          }
          if (current === 'lambda') state.lambda = true;
          if ((current === ':' && !state.lambda && state.scopes[0].type == 'py')
              || indentInfo === 'indent') {
              indent(stream, state);
          }
          var delimiter_index = '[({'.indexOf(current);
          if (delimiter_index !== -1) {
              indent(stream, state, '])}'.slice(delimiter_index, delimiter_index+1));
          }
          if (indentInfo === 'dedent') {
              if (dedent(stream, state)) {
                  return ERRORCLASS;
              }
          }
          delimiter_index = '])}'.indexOf(current);
          if (delimiter_index !== -1) {
              if (dedent(stream, state, current)) {
                  return ERRORCLASS;
              }
          }
          if (state.dedent > 0 && stream.eol() && state.scopes[0].type == 'py') {
              if (state.scopes.length > 1) state.scopes.shift();
              state.dedent -= 1;
          }
  
          return style;
      }
  
      var external = {
          startState: function(basecolumn) {
              return {
                tokenize: tokenBase,
                scopes: [{offset:basecolumn || 0, type:'py'}],
                lastToken: null,
                lambda: false,
                dedent: 0
            };
          },
  
          token: function(stream, state) {
              var style = tokenLexer(stream, state);
  
              state.lastToken = style;
  
              if (stream.eol() && stream.lambda) {
                  state.lambda = false;
              }
  
              return style;
          },
  
          indent: function(state) {
              if (state.tokenize != tokenBase) {
                  return state.tokenize.isString ? CodeMirror.Pass : 0;
              }
  
              return state.scopes[0].offset;
          }
  
      };
      return external;
  });
  
  CodeMirror.defineMIME("text/x-ipython", "ipython");
  