browser/devtools/sourceeditor/codemirror/javascript.js

Thu, 22 Jan 2015 13:21:57 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Thu, 22 Jan 2015 13:21:57 +0100
branch
TOR_BUG_9701
changeset 15
b8a032363ba2
permissions
-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 // TODO actually recognize syntax of TypeScript constructs
     3 (function(mod) {
     4   if (typeof exports == "object" && typeof module == "object") // CommonJS
     5     mod(require("../../lib/codemirror"));
     6   else if (typeof define == "function" && define.amd) // AMD
     7     define(["../../lib/codemirror"], mod);
     8   else // Plain browser env
     9     mod(CodeMirror);
    10 })(function(CodeMirror) {
    11 "use strict";
    13 CodeMirror.defineMode("javascript", function(config, parserConfig) {
    14   var indentUnit = config.indentUnit;
    15   var statementIndent = parserConfig.statementIndent;
    16   var jsonldMode = parserConfig.jsonld;
    17   var jsonMode = parserConfig.json || jsonldMode;
    18   var isTS = parserConfig.typescript;
    20   // Tokenizer
    22   var keywords = function(){
    23     function kw(type) {return {type: type, style: "keyword"};}
    24     var A = kw("keyword a"), B = kw("keyword b"), C = kw("keyword c");
    25     var operator = kw("operator"), atom = {type: "atom", style: "atom"};
    27     var jsKeywords = {
    28       "if": kw("if"), "while": A, "with": A, "else": B, "do": B, "try": B, "finally": B,
    29       "return": C, "break": C, "continue": C, "new": C, "delete": C, "throw": C, "debugger": C,
    30       "var": kw("var"), "const": kw("var"), "let": kw("var"),
    31       "function": kw("function"), "catch": kw("catch"),
    32       "for": kw("for"), "switch": kw("switch"), "case": kw("case"), "default": kw("default"),
    33       "in": operator, "typeof": operator, "instanceof": operator,
    34       "true": atom, "false": atom, "null": atom, "undefined": atom, "NaN": atom, "Infinity": atom,
    35       "this": kw("this"), "module": kw("module"), "class": kw("class"), "super": kw("atom"),
    36       "yield": C, "export": kw("export"), "import": kw("import"), "extends": C
    37     };
    39     // Extend the 'normal' keywords with the TypeScript language extensions
    40     if (isTS) {
    41       var type = {type: "variable", style: "variable-3"};
    42       var tsKeywords = {
    43         // object-like things
    44         "interface": kw("interface"),
    45         "extends": kw("extends"),
    46         "constructor": kw("constructor"),
    48         // scope modifiers
    49         "public": kw("public"),
    50         "private": kw("private"),
    51         "protected": kw("protected"),
    52         "static": kw("static"),
    54         // types
    55         "string": type, "number": type, "bool": type, "any": type
    56       };
    58       for (var attr in tsKeywords) {
    59         jsKeywords[attr] = tsKeywords[attr];
    60       }
    61     }
    63     return jsKeywords;
    64   }();
    66   var isOperatorChar = /[+\-*&%=<>!?|~^]/;
    67   var isJsonldKeyword = /^@(context|id|value|language|type|container|list|set|reverse|index|base|vocab|graph)"/;
    69   function readRegexp(stream) {
    70     var escaped = false, next, inSet = false;
    71     while ((next = stream.next()) != null) {
    72       if (!escaped) {
    73         if (next == "/" && !inSet) return;
    74         if (next == "[") inSet = true;
    75         else if (inSet && next == "]") inSet = false;
    76       }
    77       escaped = !escaped && next == "\\";
    78     }
    79   }
    81   // Used as scratch variables to communicate multiple values without
    82   // consing up tons of objects.
    83   var type, content;
    84   function ret(tp, style, cont) {
    85     type = tp; content = cont;
    86     return style;
    87   }
    88   function tokenBase(stream, state) {
    89     var ch = stream.next();
    90     if (ch == '"' || ch == "'") {
    91       state.tokenize = tokenString(ch);
    92       return state.tokenize(stream, state);
    93     } else if (ch == "." && stream.match(/^\d+(?:[eE][+\-]?\d+)?/)) {
    94       return ret("number", "number");
    95     } else if (ch == "." && stream.match("..")) {
    96       return ret("spread", "meta");
    97     } else if (/[\[\]{}\(\),;\:\.]/.test(ch)) {
    98       return ret(ch);
    99     } else if (ch == "=" && stream.eat(">")) {
   100       return ret("=>", "operator");
   101     } else if (ch == "0" && stream.eat(/x/i)) {
   102       stream.eatWhile(/[\da-f]/i);
   103       return ret("number", "number");
   104     } else if (/\d/.test(ch)) {
   105       stream.match(/^\d*(?:\.\d*)?(?:[eE][+\-]?\d+)?/);
   106       return ret("number", "number");
   107     } else if (ch == "/") {
   108       if (stream.eat("*")) {
   109         state.tokenize = tokenComment;
   110         return tokenComment(stream, state);
   111       } else if (stream.eat("/")) {
   112         stream.skipToEnd();
   113         return ret("comment", "comment");
   114       } else if (state.lastType == "operator" || state.lastType == "keyword c" ||
   115                state.lastType == "sof" || /^[\[{}\(,;:]$/.test(state.lastType)) {
   116         readRegexp(stream);
   117         stream.eatWhile(/[gimy]/); // 'y' is "sticky" option in Mozilla
   118         return ret("regexp", "string-2");
   119       } else {
   120         stream.eatWhile(isOperatorChar);
   121         return ret("operator", "operator", stream.current());
   122       }
   123     } else if (ch == "`") {
   124       state.tokenize = tokenQuasi;
   125       return tokenQuasi(stream, state);
   126     } else if (ch == "#") {
   127       stream.skipToEnd();
   128       return ret("error", "error");
   129     } else if (isOperatorChar.test(ch)) {
   130       stream.eatWhile(isOperatorChar);
   131       return ret("operator", "operator", stream.current());
   132     } else {
   133       stream.eatWhile(/[\w\$_]/);
   134       var word = stream.current(), known = keywords.propertyIsEnumerable(word) && keywords[word];
   135       return (known && state.lastType != ".") ? ret(known.type, known.style, word) :
   136                      ret("variable", "variable", word);
   137     }
   138   }
   140   function tokenString(quote) {
   141     return function(stream, state) {
   142       var escaped = false, next;
   143       if (jsonldMode && stream.peek() == "@" && stream.match(isJsonldKeyword)){
   144         state.tokenize = tokenBase;
   145         return ret("jsonld-keyword", "meta");
   146       }
   147       while ((next = stream.next()) != null) {
   148         if (next == quote && !escaped) break;
   149         escaped = !escaped && next == "\\";
   150       }
   151       if (!escaped) state.tokenize = tokenBase;
   152       return ret("string", "string");
   153     };
   154   }
   156   function tokenComment(stream, state) {
   157     var maybeEnd = false, ch;
   158     while (ch = stream.next()) {
   159       if (ch == "/" && maybeEnd) {
   160         state.tokenize = tokenBase;
   161         break;
   162       }
   163       maybeEnd = (ch == "*");
   164     }
   165     return ret("comment", "comment");
   166   }
   168   function tokenQuasi(stream, state) {
   169     var escaped = false, next;
   170     while ((next = stream.next()) != null) {
   171       if (!escaped && (next == "`" || next == "$" && stream.eat("{"))) {
   172         state.tokenize = tokenBase;
   173         break;
   174       }
   175       escaped = !escaped && next == "\\";
   176     }
   177     return ret("quasi", "string-2", stream.current());
   178   }
   180   var brackets = "([{}])";
   181   // This is a crude lookahead trick to try and notice that we're
   182   // parsing the argument patterns for a fat-arrow function before we
   183   // actually hit the arrow token. It only works if the arrow is on
   184   // the same line as the arguments and there's no strange noise
   185   // (comments) in between. Fallback is to only notice when we hit the
   186   // arrow, and not declare the arguments as locals for the arrow
   187   // body.
   188   function findFatArrow(stream, state) {
   189     if (state.fatArrowAt) state.fatArrowAt = null;
   190     var arrow = stream.string.indexOf("=>", stream.start);
   191     if (arrow < 0) return;
   193     var depth = 0, sawSomething = false;
   194     for (var pos = arrow - 1; pos >= 0; --pos) {
   195       var ch = stream.string.charAt(pos);
   196       var bracket = brackets.indexOf(ch);
   197       if (bracket >= 0 && bracket < 3) {
   198         if (!depth) { ++pos; break; }
   199         if (--depth == 0) break;
   200       } else if (bracket >= 3 && bracket < 6) {
   201         ++depth;
   202       } else if (/[$\w]/.test(ch)) {
   203         sawSomething = true;
   204       } else if (sawSomething && !depth) {
   205         ++pos;
   206         break;
   207       }
   208     }
   209     if (sawSomething && !depth) state.fatArrowAt = pos;
   210   }
   212   // Parser
   214   var atomicTypes = {"atom": true, "number": true, "variable": true, "string": true, "regexp": true, "this": true, "jsonld-keyword": true};
   216   function JSLexical(indented, column, type, align, prev, info) {
   217     this.indented = indented;
   218     this.column = column;
   219     this.type = type;
   220     this.prev = prev;
   221     this.info = info;
   222     if (align != null) this.align = align;
   223   }
   225   function inScope(state, varname) {
   226     for (var v = state.localVars; v; v = v.next)
   227       if (v.name == varname) return true;
   228     for (var cx = state.context; cx; cx = cx.prev) {
   229       for (var v = cx.vars; v; v = v.next)
   230         if (v.name == varname) return true;
   231     }
   232   }
   234   function parseJS(state, style, type, content, stream) {
   235     var cc = state.cc;
   236     // Communicate our context to the combinators.
   237     // (Less wasteful than consing up a hundred closures on every call.)
   238     cx.state = state; cx.stream = stream; cx.marked = null, cx.cc = cc;
   240     if (!state.lexical.hasOwnProperty("align"))
   241       state.lexical.align = true;
   243     while(true) {
   244       var combinator = cc.length ? cc.pop() : jsonMode ? expression : statement;
   245       if (combinator(type, content)) {
   246         while(cc.length && cc[cc.length - 1].lex)
   247           cc.pop()();
   248         if (cx.marked) return cx.marked;
   249         if (type == "variable" && inScope(state, content)) return "variable-2";
   250         return style;
   251       }
   252     }
   253   }
   255   // Combinator utils
   257   var cx = {state: null, column: null, marked: null, cc: null};
   258   function pass() {
   259     for (var i = arguments.length - 1; i >= 0; i--) cx.cc.push(arguments[i]);
   260   }
   261   function cont() {
   262     pass.apply(null, arguments);
   263     return true;
   264   }
   265   function register(varname) {
   266     function inList(list) {
   267       for (var v = list; v; v = v.next)
   268         if (v.name == varname) return true;
   269       return false;
   270     }
   271     var state = cx.state;
   272     if (state.context) {
   273       cx.marked = "def";
   274       if (inList(state.localVars)) return;
   275       state.localVars = {name: varname, next: state.localVars};
   276     } else {
   277       if (inList(state.globalVars)) return;
   278       if (parserConfig.globalVars)
   279         state.globalVars = {name: varname, next: state.globalVars};
   280     }
   281   }
   283   // Combinators
   285   var defaultVars = {name: "this", next: {name: "arguments"}};
   286   function pushcontext() {
   287     cx.state.context = {prev: cx.state.context, vars: cx.state.localVars};
   288     cx.state.localVars = defaultVars;
   289   }
   290   function popcontext() {
   291     cx.state.localVars = cx.state.context.vars;
   292     cx.state.context = cx.state.context.prev;
   293   }
   294   function pushlex(type, info) {
   295     var result = function() {
   296       var state = cx.state, indent = state.indented;
   297       if (state.lexical.type == "stat") indent = state.lexical.indented;
   298       state.lexical = new JSLexical(indent, cx.stream.column(), type, null, state.lexical, info);
   299     };
   300     result.lex = true;
   301     return result;
   302   }
   303   function poplex() {
   304     var state = cx.state;
   305     if (state.lexical.prev) {
   306       if (state.lexical.type == ")")
   307         state.indented = state.lexical.indented;
   308       state.lexical = state.lexical.prev;
   309     }
   310   }
   311   poplex.lex = true;
   313   function expect(wanted) {
   314     function exp(type) {
   315       if (type == wanted) return cont();
   316       else if (wanted == ";") return pass();
   317       else return cont(exp);
   318     };
   319     return exp;
   320   }
   322   function statement(type, value) {
   323     if (type == "var") return cont(pushlex("vardef", value.length), vardef, expect(";"), poplex);
   324     if (type == "keyword a") return cont(pushlex("form"), expression, statement, poplex);
   325     if (type == "keyword b") return cont(pushlex("form"), statement, poplex);
   326     if (type == "{") return cont(pushlex("}"), block, poplex);
   327     if (type == ";") return cont();
   328     if (type == "if") return cont(pushlex("form"), expression, statement, poplex, maybeelse);
   329     if (type == "function") return cont(functiondef);
   330     if (type == "for") return cont(pushlex("form"), forspec, statement, poplex);
   331     if (type == "variable") return cont(pushlex("stat"), maybelabel);
   332     if (type == "switch") return cont(pushlex("form"), expression, pushlex("}", "switch"), expect("{"),
   333                                       block, poplex, poplex);
   334     if (type == "case") return cont(expression, expect(":"));
   335     if (type == "default") return cont(expect(":"));
   336     if (type == "catch") return cont(pushlex("form"), pushcontext, expect("("), funarg, expect(")"),
   337                                      statement, poplex, popcontext);
   338     if (type == "module") return cont(pushlex("form"), pushcontext, afterModule, popcontext, poplex);
   339     if (type == "class") return cont(pushlex("form"), className, objlit, poplex);
   340     if (type == "export") return cont(pushlex("form"), afterExport, poplex);
   341     if (type == "import") return cont(pushlex("form"), afterImport, poplex);
   342     return pass(pushlex("stat"), expression, expect(";"), poplex);
   343   }
   344   function expression(type) {
   345     return expressionInner(type, false);
   346   }
   347   function expressionNoComma(type) {
   348     return expressionInner(type, true);
   349   }
   350   function expressionInner(type, noComma) {
   351     if (cx.state.fatArrowAt == cx.stream.start) {
   352       var body = noComma ? arrowBodyNoComma : arrowBody;
   353       if (type == "(") return cont(pushcontext, pushlex(")"), commasep(pattern, ")"), poplex, expect("=>"), body, popcontext);
   354       else if (type == "variable") return pass(pushcontext, pattern, expect("=>"), body, popcontext);
   355     }
   357     var maybeop = noComma ? maybeoperatorNoComma : maybeoperatorComma;
   358     if (atomicTypes.hasOwnProperty(type)) return cont(maybeop);
   359     if (type == "function") return cont(functiondef);
   360     if (type == "keyword c") return cont(noComma ? maybeexpressionNoComma : maybeexpression);
   361     if (type == "(") return cont(pushlex(")"), maybeexpression, comprehension, expect(")"), poplex, maybeop);
   362     if (type == "operator" || type == "spread") return cont(noComma ? expressionNoComma : expression);
   363     if (type == "[") return cont(pushlex("]"), arrayLiteral, poplex, maybeop);
   364     if (type == "{") return contCommasep(objprop, "}", null, maybeop);
   365     return cont();
   366   }
   367   function maybeexpression(type) {
   368     if (type.match(/[;\}\)\],]/)) return pass();
   369     return pass(expression);
   370   }
   371   function maybeexpressionNoComma(type) {
   372     if (type.match(/[;\}\)\],]/)) return pass();
   373     return pass(expressionNoComma);
   374   }
   376   function maybeoperatorComma(type, value) {
   377     if (type == ",") return cont(expression);
   378     return maybeoperatorNoComma(type, value, false);
   379   }
   380   function maybeoperatorNoComma(type, value, noComma) {
   381     var me = noComma == false ? maybeoperatorComma : maybeoperatorNoComma;
   382     var expr = noComma == false ? expression : expressionNoComma;
   383     if (value == "=>") return cont(pushcontext, noComma ? arrowBodyNoComma : arrowBody, popcontext);
   384     if (type == "operator") {
   385       if (/\+\+|--/.test(value)) return cont(me);
   386       if (value == "?") return cont(expression, expect(":"), expr);
   387       return cont(expr);
   388     }
   389     if (type == "quasi") { cx.cc.push(me); return quasi(value); }
   390     if (type == ";") return;
   391     if (type == "(") return contCommasep(expressionNoComma, ")", "call", me);
   392     if (type == ".") return cont(property, me);
   393     if (type == "[") return cont(pushlex("]"), maybeexpression, expect("]"), poplex, me);
   394   }
   395   function quasi(value) {
   396     if (value.slice(value.length - 2) != "${") return cont();
   397     return cont(expression, continueQuasi);
   398   }
   399   function continueQuasi(type) {
   400     if (type == "}") {
   401       cx.marked = "string-2";
   402       cx.state.tokenize = tokenQuasi;
   403       return cont();
   404     }
   405   }
   406   function arrowBody(type) {
   407     findFatArrow(cx.stream, cx.state);
   408     if (type == "{") return pass(statement);
   409     return pass(expression);
   410   }
   411   function arrowBodyNoComma(type) {
   412     findFatArrow(cx.stream, cx.state);
   413     if (type == "{") return pass(statement);
   414     return pass(expressionNoComma);
   415   }
   416   function maybelabel(type) {
   417     if (type == ":") return cont(poplex, statement);
   418     return pass(maybeoperatorComma, expect(";"), poplex);
   419   }
   420   function property(type) {
   421     if (type == "variable") {cx.marked = "property"; return cont();}
   422   }
   423   function objprop(type, value) {
   424     if (type == "variable") {
   425       cx.marked = "property";
   426       if (value == "get" || value == "set") return cont(getterSetter);
   427     } else if (type == "number" || type == "string") {
   428       cx.marked = jsonldMode ? "property" : (type + " property");
   429     } else if (type == "[") {
   430       return cont(expression, expect("]"), afterprop);
   431     }
   432     if (atomicTypes.hasOwnProperty(type)) return cont(afterprop);
   433   }
   434   function getterSetter(type) {
   435     if (type != "variable") return pass(afterprop);
   436     cx.marked = "property";
   437     return cont(functiondef);
   438   }
   439   function afterprop(type) {
   440     if (type == ":") return cont(expressionNoComma);
   441     if (type == "(") return pass(functiondef);
   442   }
   443   function commasep(what, end) {
   444     function proceed(type) {
   445       if (type == ",") {
   446         var lex = cx.state.lexical;
   447         if (lex.info == "call") lex.pos = (lex.pos || 0) + 1;
   448         return cont(what, proceed);
   449       }
   450       if (type == end) return cont();
   451       return cont(expect(end));
   452     }
   453     return function(type) {
   454       if (type == end) return cont();
   455       return pass(what, proceed);
   456     };
   457   }
   458   function contCommasep(what, end, info) {
   459     for (var i = 3; i < arguments.length; i++)
   460       cx.cc.push(arguments[i]);
   461     return cont(pushlex(end, info), commasep(what, end), poplex);
   462   }
   463   function block(type) {
   464     if (type == "}") return cont();
   465     return pass(statement, block);
   466   }
   467   function maybetype(type) {
   468     if (isTS && type == ":") return cont(typedef);
   469   }
   470   function typedef(type) {
   471     if (type == "variable"){cx.marked = "variable-3"; return cont();}
   472   }
   473   function vardef() {
   474     return pass(pattern, maybetype, maybeAssign, vardefCont);
   475   }
   476   function pattern(type, value) {
   477     if (type == "variable") { register(value); return cont(); }
   478     if (type == "[") return contCommasep(pattern, "]");
   479     if (type == "{") return contCommasep(proppattern, "}");
   480   }
   481   function proppattern(type, value) {
   482     if (type == "variable" && !cx.stream.match(/^\s*:/, false)) {
   483       register(value);
   484       return cont(maybeAssign);
   485     }
   486     if (type == "variable") cx.marked = "property";
   487     return cont(expect(":"), pattern, maybeAssign);
   488   }
   489   function maybeAssign(_type, value) {
   490     if (value == "=") return cont(expressionNoComma);
   491   }
   492   function vardefCont(type) {
   493     if (type == ",") return cont(vardef);
   494   }
   495   function maybeelse(type, value) {
   496     if (type == "keyword b" && value == "else") return cont(pushlex("form"), statement, poplex);
   497   }
   498   function forspec(type) {
   499     if (type == "(") return cont(pushlex(")"), forspec1, expect(")"), poplex);
   500   }
   501   function forspec1(type) {
   502     if (type == "var") return cont(vardef, expect(";"), forspec2);
   503     if (type == ";") return cont(forspec2);
   504     if (type == "variable") return cont(formaybeinof);
   505     return pass(expression, expect(";"), forspec2);
   506   }
   507   function formaybeinof(_type, value) {
   508     if (value == "in" || value == "of") { cx.marked = "keyword"; return cont(expression); }
   509     return cont(maybeoperatorComma, forspec2);
   510   }
   511   function forspec2(type, value) {
   512     if (type == ";") return cont(forspec3);
   513     if (value == "in" || value == "of") { cx.marked = "keyword"; return cont(expression); }
   514     return pass(expression, expect(";"), forspec3);
   515   }
   516   function forspec3(type) {
   517     if (type != ")") cont(expression);
   518   }
   519   function functiondef(type, value) {
   520     if (value == "*") {cx.marked = "keyword"; return cont(functiondef);}
   521     if (type == "variable") {register(value); return cont(functiondef);}
   522     if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, statement, popcontext);
   523   }
   524   function funarg(type) {
   525     if (type == "spread") return cont(funarg);
   526     return pass(pattern, maybetype);
   527   }
   528   function className(type, value) {
   529     if (type == "variable") {register(value); return cont(classNameAfter);}
   530   }
   531   function classNameAfter(_type, value) {
   532     if (value == "extends") return cont(expression);
   533   }
   534   function objlit(type) {
   535     if (type == "{") return contCommasep(objprop, "}");
   536   }
   537   function afterModule(type, value) {
   538     if (type == "string") return cont(statement);
   539     if (type == "variable") { register(value); return cont(maybeFrom); }
   540   }
   541   function afterExport(_type, value) {
   542     if (value == "*") { cx.marked = "keyword"; return cont(maybeFrom, expect(";")); }
   543     if (value == "default") { cx.marked = "keyword"; return cont(expression, expect(";")); }
   544     return pass(statement);
   545   }
   546   function afterImport(type) {
   547     if (type == "string") return cont();
   548     return pass(importSpec, maybeFrom);
   549   }
   550   function importSpec(type, value) {
   551     if (type == "{") return contCommasep(importSpec, "}");
   552     if (type == "variable") register(value);
   553     return cont();
   554   }
   555   function maybeFrom(_type, value) {
   556     if (value == "from") { cx.marked = "keyword"; return cont(expression); }
   557   }
   558   function arrayLiteral(type) {
   559     if (type == "]") return cont();
   560     return pass(expressionNoComma, maybeArrayComprehension);
   561   }
   562   function maybeArrayComprehension(type) {
   563     if (type == "for") return pass(comprehension, expect("]"));
   564     if (type == ",") return cont(commasep(expressionNoComma, "]"));
   565     return pass(commasep(expressionNoComma, "]"));
   566   }
   567   function comprehension(type) {
   568     if (type == "for") return cont(forspec, comprehension);
   569     if (type == "if") return cont(expression, comprehension);
   570   }
   572   // Interface
   574   return {
   575     startState: function(basecolumn) {
   576       var state = {
   577         tokenize: tokenBase,
   578         lastType: "sof",
   579         cc: [],
   580         lexical: new JSLexical((basecolumn || 0) - indentUnit, 0, "block", false),
   581         localVars: parserConfig.localVars,
   582         context: parserConfig.localVars && {vars: parserConfig.localVars},
   583         indented: 0
   584       };
   585       if (parserConfig.globalVars && typeof parserConfig.globalVars == "object")
   586         state.globalVars = parserConfig.globalVars;
   587       return state;
   588     },
   590     token: function(stream, state) {
   591       if (stream.sol()) {
   592         if (!state.lexical.hasOwnProperty("align"))
   593           state.lexical.align = false;
   594         state.indented = stream.indentation();
   595         findFatArrow(stream, state);
   596       }
   597       if (state.tokenize != tokenComment && stream.eatSpace()) return null;
   598       var style = state.tokenize(stream, state);
   599       if (type == "comment") return style;
   600       state.lastType = type == "operator" && (content == "++" || content == "--") ? "incdec" : type;
   601       return parseJS(state, style, type, content, stream);
   602     },
   604     indent: function(state, textAfter) {
   605       if (state.tokenize == tokenComment) return CodeMirror.Pass;
   606       if (state.tokenize != tokenBase) return 0;
   607       var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical;
   608       // Kludge to prevent 'maybelse' from blocking lexical scope pops
   609       for (var i = state.cc.length - 1; i >= 0; --i) {
   610         var c = state.cc[i];
   611         if (c == poplex) lexical = lexical.prev;
   612         else if (c != maybeelse) break;
   613       }
   614       if (lexical.type == "stat" && firstChar == "}") lexical = lexical.prev;
   615       if (statementIndent && lexical.type == ")" && lexical.prev.type == "stat")
   616         lexical = lexical.prev;
   617       var type = lexical.type, closing = firstChar == type;
   619       if (type == "vardef") return lexical.indented + (state.lastType == "operator" || state.lastType == "," ? lexical.info + 1 : 0);
   620       else if (type == "form" && firstChar == "{") return lexical.indented;
   621       else if (type == "form") return lexical.indented + indentUnit;
   622       else if (type == "stat")
   623         return lexical.indented + (state.lastType == "operator" || state.lastType == "," ? statementIndent || indentUnit : 0);
   624       else if (lexical.info == "switch" && !closing && parserConfig.doubleIndentSwitch != false)
   625         return lexical.indented + (/^(?:case|default)\b/.test(textAfter) ? indentUnit : 2 * indentUnit);
   626       else if (lexical.align) return lexical.column + (closing ? 0 : 1);
   627       else return lexical.indented + (closing ? 0 : indentUnit);
   628     },
   630     electricChars: ":{}",
   631     blockCommentStart: jsonMode ? null : "/*",
   632     blockCommentEnd: jsonMode ? null : "*/",
   633     lineComment: jsonMode ? null : "//",
   634     fold: "brace",
   636     helperType: jsonMode ? "json" : "javascript",
   637     jsonldMode: jsonldMode,
   638     jsonMode: jsonMode
   639   };
   640 });
   642 CodeMirror.defineMIME("text/javascript", "javascript");
   643 CodeMirror.defineMIME("text/ecmascript", "javascript");
   644 CodeMirror.defineMIME("application/javascript", "javascript");
   645 CodeMirror.defineMIME("application/ecmascript", "javascript");
   646 CodeMirror.defineMIME("application/json", {name: "javascript", json: true});
   647 CodeMirror.defineMIME("application/x-json", {name: "javascript", json: true});
   648 CodeMirror.defineMIME("application/ld+json", {name: "javascript", jsonld: true});
   649 CodeMirror.defineMIME("text/typescript", { name: "javascript", typescript: true });
   650 CodeMirror.defineMIME("application/typescript", { name: "javascript", typescript: true });
   652 });

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