tor-browser

javascript.js (37909B)

---

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

(function(mod) {
 if (typeof exports == "object" && typeof module == "object") // CommonJS
   mod(require("resource://devtools/client/shared/sourceeditor/codemirror/lib/codemirror.js"));
 else if (typeof define == "function" && define.amd) // AMD
   define(["../../lib/codemirror"], mod);
 else // Plain browser env
   mod(CodeMirror);
})(function(CodeMirror) {
"use strict";

CodeMirror.defineMode("javascript", function(config, parserConfig) {
 var indentUnit = config.indentUnit;
 var statementIndent = parserConfig.statementIndent;
 var jsonldMode = parserConfig.jsonld;
 var jsonMode = parserConfig.json || jsonldMode;
 var isTS = parserConfig.typescript;
 var wordRE = parserConfig.wordCharacters || /[\w$\xa1-\uffff]/;

 // Tokenizer

 var keywords = function(){
   function kw(type) {return {type: type, style: "keyword"};}
   var A = kw("keyword a"), B = kw("keyword b"), C = kw("keyword c"), D = kw("keyword d");
   var operator = kw("operator"), atom = {type: "atom", style: "atom"};

   return {
     "if": kw("if"), "while": A, "with": A, "else": B, "do": B, "try": B, "finally": B,
     "return": D, "break": D, "continue": D, "new": kw("new"), "delete": C, "void": C, "throw": C,
     "debugger": kw("debugger"), "var": kw("var"), "const": kw("var"), "let": kw("var"),
     "function": kw("function"), "catch": kw("catch"),
     "for": kw("for"), "switch": kw("switch"), "case": kw("case"), "default": kw("default"),
     "in": operator, "typeof": operator, "instanceof": operator,
     "true": atom, "false": atom, "null": atom, "undefined": atom, "NaN": atom, "Infinity": atom,
     "this": kw("this"), "class": kw("class"), "super": kw("atom"),
     "yield": C, "export": kw("export"), "import": kw("import"), "extends": C,
     "await": C
   };
 }();

 var isOperatorChar = /[+\-*&%=<>!?|~^@]/;
 var isJsonldKeyword = /^@(context|id|value|language|type|container|list|set|reverse|index|base|vocab|graph)"/;

 function readRegexp(stream) {
   var escaped = false, next, inSet = false;
   while ((next = stream.next()) != null) {
     if (!escaped) {
       if (next == "/" && !inSet) return;
       if (next == "[") inSet = true;
       else if (inSet && next == "]") inSet = false;
     }
     escaped = !escaped && next == "\\";
   }
 }

 // Used as scratch variables to communicate multiple values without
 // consing up tons of objects.
 var type, content;
 function ret(tp, style, cont) {
   type = tp; content = cont;
   return style;
 }
 function tokenBase(stream, state) {
   var ch = stream.next();
   if (ch == '"' || ch == "'") {
     state.tokenize = tokenString(ch);
     return state.tokenize(stream, state);
   } else if (ch == "." && stream.match(/^\d[\d_]*(?:[eE][+\-]?[\d_]+)?/)) {
     return ret("number", "number");
   } else if (ch == "." && stream.match("..")) {
     return ret("spread", "meta");
   } else if (/[\[\]{}\(\),;\:\.]/.test(ch)) {
     return ret(ch);
   } else if (ch == "=" && stream.eat(">")) {
     return ret("=>", "operator");
   } else if (ch == "0" && stream.match(/^(?:x[\dA-Fa-f_]+|o[0-7_]+|b[01_]+)n?/)) {
     return ret("number", "number");
   } else if (/\d/.test(ch)) {
     stream.match(/^[\d_]*(?:n|(?:\.[\d_]*)?(?:[eE][+\-]?[\d_]+)?)?/);
     return ret("number", "number");
   } else if (ch == "/") {
     if (stream.eat("*")) {
       state.tokenize = tokenComment;
       return tokenComment(stream, state);
     } else if (stream.eat("/")) {
       stream.skipToEnd();
       return ret("comment", "comment");
     } else if (expressionAllowed(stream, state, 1)) {
       readRegexp(stream);
       stream.match(/^\b(([gimyus])(?![gimyus]*\2))+\b/);
       return ret("regexp", "string-2");
     } else {
       stream.eat("=");
       return ret("operator", "operator", stream.current());
     }
   } else if (ch == "`") {
     state.tokenize = tokenQuasi;
     return tokenQuasi(stream, state);
   } else if (ch == "#" && stream.peek() == "!") {
     stream.skipToEnd();
     return ret("meta", "meta");
   } else if (ch == "#" && stream.eatWhile(wordRE)) {
     return ret("variable", "property")
   } else if (ch == "<" && stream.match("!--") ||
              (ch == "-" && stream.match("->") && !/\S/.test(stream.string.slice(0, stream.start)))) {
     stream.skipToEnd()
     return ret("comment", "comment")
   } else if (isOperatorChar.test(ch)) {
     if (ch != ">" || !state.lexical || state.lexical.type != ">") {
       if (stream.eat("=")) {
         if (ch == "!" || ch == "=") stream.eat("=")
       } else if (/[<>*+\-|&?]/.test(ch)) {
         stream.eat(ch)
         if (ch == ">") stream.eat(ch)
       }
     }
     if (ch == "?" && stream.eat(".")) return ret(".")
     return ret("operator", "operator", stream.current());
   } else if (wordRE.test(ch)) {
     stream.eatWhile(wordRE);
     var word = stream.current()
     if (state.lastType != ".") {
       if (keywords.propertyIsEnumerable(word)) {
         var kw = keywords[word]
         return ret(kw.type, kw.style, word)
       }
       if (word == "async" && stream.match(/^(\s|\/\*([^*]|\*(?!\/))*?\*\/)*[\[\(\w]/, false))
         return ret("async", "keyword", word)
     }
     return ret("variable", "variable", word)
   }
 }

 function tokenString(quote) {
   return function(stream, state) {
     var escaped = false, next;
     if (jsonldMode && stream.peek() == "@" && stream.match(isJsonldKeyword)){
       state.tokenize = tokenBase;
       return ret("jsonld-keyword", "meta");
     }
     while ((next = stream.next()) != null) {
       if (next == quote && !escaped) break;
       escaped = !escaped && next == "\\";
     }
     if (!escaped) state.tokenize = tokenBase;
     return ret("string", "string");
   };
 }

 function tokenComment(stream, state) {
   var maybeEnd = false, ch;
   while (ch = stream.next()) {
     if (ch == "/" && maybeEnd) {
       state.tokenize = tokenBase;
       break;
     }
     maybeEnd = (ch == "*");
   }
   return ret("comment", "comment");
 }

 function tokenQuasi(stream, state) {
   var escaped = false, next;
   while ((next = stream.next()) != null) {
     if (!escaped && (next == "`" || next == "$" && stream.eat("{"))) {
       state.tokenize = tokenBase;
       break;
     }
     escaped = !escaped && next == "\\";
   }
   return ret("quasi", "string-2", stream.current());
 }

 var brackets = "([{}])";
 // This is a crude lookahead trick to try and notice that we're
 // parsing the argument patterns for a fat-arrow function before we
 // actually hit the arrow token. It only works if the arrow is on
 // the same line as the arguments and there's no strange noise
 // (comments) in between. Fallback is to only notice when we hit the
 // arrow, and not declare the arguments as locals for the arrow
 // body.
 function findFatArrow(stream, state) {
   if (state.fatArrowAt) state.fatArrowAt = null;
   var arrow = stream.string.indexOf("=>", stream.start);
   if (arrow < 0) return;

   if (isTS) { // Try to skip TypeScript return type declarations after the arguments
     var m = /:\s*(?:\w+(?:<[^>]*>|\[\])?|\{[^}]*\})\s*$/.exec(stream.string.slice(stream.start, arrow))
     if (m) arrow = m.index
   }

   var depth = 0, sawSomething = false;
   for (var pos = arrow - 1; pos >= 0; --pos) {
     var ch = stream.string.charAt(pos);
     var bracket = brackets.indexOf(ch);
     if (bracket >= 0 && bracket < 3) {
       if (!depth) { ++pos; break; }
       if (--depth == 0) { if (ch == "(") sawSomething = true; break; }
     } else if (bracket >= 3 && bracket < 6) {
       ++depth;
     } else if (wordRE.test(ch)) {
       sawSomething = true;
     } else if (/["'\/`]/.test(ch)) {
       for (;; --pos) {
         if (pos == 0) return
         var next = stream.string.charAt(pos - 1)
         if (next == ch && stream.string.charAt(pos - 2) != "\\") { pos--; break }
       }
     } else if (sawSomething && !depth) {
       ++pos;
       break;
     }
   }
   if (sawSomething && !depth) state.fatArrowAt = pos;
 }

 // Parser

 var atomicTypes = {"atom": true, "number": true, "variable": true, "string": true, "regexp": true, "this": true, "jsonld-keyword": true};

 function JSLexical(indented, column, type, align, prev, info) {
   this.indented = indented;
   this.column = column;
   this.type = type;
   this.prev = prev;
   this.info = info;
   if (align != null) this.align = align;
 }

 function inScope(state, varname) {
   for (var v = state.localVars; v; v = v.next)
     if (v.name == varname) return true;
   for (var cx = state.context; cx; cx = cx.prev) {
     for (var v = cx.vars; v; v = v.next)
       if (v.name == varname) return true;
   }
 }

 function parseJS(state, style, type, content, stream) {
   var cc = state.cc;
   // Communicate our context to the combinators.
   // (Less wasteful than consing up a hundred closures on every call.)
   cx.state = state; cx.stream = stream; cx.marked = null, cx.cc = cc; cx.style = style;

   if (!state.lexical.hasOwnProperty("align"))
     state.lexical.align = true;

   while(true) {
     var combinator = cc.length ? cc.pop() : jsonMode ? expression : statement;
     if (combinator(type, content)) {
       while(cc.length && cc[cc.length - 1].lex)
         cc.pop()();
       if (cx.marked) return cx.marked;
       if (type == "variable" && inScope(state, content)) return "variable-2";
       return style;
     }
   }
 }

 // Combinator utils

 var cx = {state: null, column: null, marked: null, cc: null};
 function pass() {
   for (var i = arguments.length - 1; i >= 0; i--) cx.cc.push(arguments[i]);
 }
 function cont() {
   pass.apply(null, arguments);
   return true;
 }
 function inList(name, list) {
   for (var v = list; v; v = v.next) if (v.name == name) return true
   return false;
 }
 function register(varname) {
   var state = cx.state;
   cx.marked = "def";
   if (state.context) {
     if (state.lexical.info == "var" && state.context && state.context.block) {
       // FIXME function decls are also not block scoped
       var newContext = registerVarScoped(varname, state.context)
       if (newContext != null) {
         state.context = newContext
         return
       }
     } else if (!inList(varname, state.localVars)) {
       state.localVars = new Var(varname, state.localVars)
       return
     }
   }
   // Fall through means this is global
   if (parserConfig.globalVars && !inList(varname, state.globalVars))
     state.globalVars = new Var(varname, state.globalVars)
 }
 function registerVarScoped(varname, context) {
   if (!context) {
     return null
   } else if (context.block) {
     var inner = registerVarScoped(varname, context.prev)
     if (!inner) return null
     if (inner == context.prev) return context
     return new Context(inner, context.vars, true)
   } else if (inList(varname, context.vars)) {
     return context
   } else {
     return new Context(context.prev, new Var(varname, context.vars), false)
   }
 }

 function isModifier(name) {
   return name == "public" || name == "private" || name == "protected" || name == "abstract" || name == "readonly"
 }

 // Combinators

 function Context(prev, vars, block) { this.prev = prev; this.vars = vars; this.block = block }
 function Var(name, next) { this.name = name; this.next = next }

 var defaultVars = new Var("this", new Var("arguments", null))
 function pushcontext() {
   cx.state.context = new Context(cx.state.context, cx.state.localVars, false)
   cx.state.localVars = defaultVars
 }
 function pushblockcontext() {
   cx.state.context = new Context(cx.state.context, cx.state.localVars, true)
   cx.state.localVars = null
 }
 function popcontext() {
   cx.state.localVars = cx.state.context.vars
   cx.state.context = cx.state.context.prev
 }
 popcontext.lex = true
 function pushlex(type, info) {
   var result = function() {
     var state = cx.state, indent = state.indented;
     if (state.lexical.type == "stat") indent = state.lexical.indented;
     else for (var outer = state.lexical; outer && outer.type == ")" && outer.align; outer = outer.prev)
       indent = outer.indented;
     state.lexical = new JSLexical(indent, cx.stream.column(), type, null, state.lexical, info);
   };
   result.lex = true;
   return result;
 }
 function poplex() {
   var state = cx.state;
   if (state.lexical.prev) {
     if (state.lexical.type == ")")
       state.indented = state.lexical.indented;
     state.lexical = state.lexical.prev;
   }
 }
 poplex.lex = true;

 function expect(wanted) {
   function exp(type) {
     if (type == wanted) return cont();
     else if (wanted == ";" || type == "}" || type == ")" || type == "]") return pass();
     else return cont(exp);
   };
   return exp;
 }

 function statement(type, value) {
   if (type == "var") return cont(pushlex("vardef", value), vardef, expect(";"), poplex);
   if (type == "keyword a") return cont(pushlex("form"), parenExpr, statement, poplex);
   if (type == "keyword b") return cont(pushlex("form"), statement, poplex);
   if (type == "keyword d") return cx.stream.match(/^\s*$/, false) ? cont() : cont(pushlex("stat"), maybeexpression, expect(";"), poplex);
   if (type == "debugger") return cont(expect(";"));
   if (type == "{") return cont(pushlex("}"), pushblockcontext, block, poplex, popcontext);
   if (type == ";") return cont();
   if (type == "if") {
     if (cx.state.lexical.info == "else" && cx.state.cc[cx.state.cc.length - 1] == poplex)
       cx.state.cc.pop()();
     return cont(pushlex("form"), parenExpr, statement, poplex, maybeelse);
   }
   if (type == "function") return cont(functiondef);
   if (type == "for") return cont(pushlex("form"), forspec, statement, poplex);
   if (type == "class" || (isTS && value == "interface")) {
     cx.marked = "keyword"
     return cont(pushlex("form", type == "class" ? type : value), className, poplex)
   }
   if (type == "variable") {
     if (isTS && value == "declare") {
       cx.marked = "keyword"
       return cont(statement)
     } else if (isTS && (value == "module" || value == "enum" || value == "type") && cx.stream.match(/^\s*\w/, false)) {
       cx.marked = "keyword"
       if (value == "enum") return cont(enumdef);
       else if (value == "type") return cont(typename, expect("operator"), typeexpr, expect(";"));
       else return cont(pushlex("form"), pattern, expect("{"), pushlex("}"), block, poplex, poplex)
     } else if (isTS && value == "namespace") {
       cx.marked = "keyword"
       return cont(pushlex("form"), expression, statement, poplex)
     } else if (isTS && value == "abstract") {
       cx.marked = "keyword"
       return cont(statement)
     } else {
       return cont(pushlex("stat"), maybelabel);
     }
   }
   if (type == "switch") return cont(pushlex("form"), parenExpr, expect("{"), pushlex("}", "switch"), pushblockcontext,
                                     block, poplex, poplex, popcontext);
   if (type == "case") return cont(expression, expect(":"));
   if (type == "default") return cont(expect(":"));
   if (type == "catch") return cont(pushlex("form"), pushcontext, maybeCatchBinding, statement, poplex, popcontext);
   if (type == "export") return cont(pushlex("stat"), afterExport, poplex);
   if (type == "import") return cont(pushlex("stat"), afterImport, poplex);
   if (type == "async") return cont(statement)
   if (value == "@") return cont(expression, statement)
   return pass(pushlex("stat"), expression, expect(";"), poplex);
 }
 function maybeCatchBinding(type) {
   if (type == "(") return cont(funarg, expect(")"))
 }
 function expression(type, value) {
   return expressionInner(type, value, false);
 }
 function expressionNoComma(type, value) {
   return expressionInner(type, value, true);
 }
 function parenExpr(type) {
   if (type != "(") return pass()
   return cont(pushlex(")"), maybeexpression, expect(")"), poplex)
 }
 function expressionInner(type, value, noComma) {
   if (cx.state.fatArrowAt == cx.stream.start) {
     var body = noComma ? arrowBodyNoComma : arrowBody;
     if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, expect("=>"), body, popcontext);
     else if (type == "variable") return pass(pushcontext, pattern, expect("=>"), body, popcontext);
   }

   var maybeop = noComma ? maybeoperatorNoComma : maybeoperatorComma;
   if (atomicTypes.hasOwnProperty(type)) return cont(maybeop);
   if (type == "function") return cont(functiondef, maybeop);
   if (type == "class" || (isTS && value == "interface")) { cx.marked = "keyword"; return cont(pushlex("form"), classExpression, poplex); }
   if (type == "keyword c" || type == "async") return cont(noComma ? expressionNoComma : expression);
   if (type == "(") return cont(pushlex(")"), maybeexpression, expect(")"), poplex, maybeop);
   if (type == "operator" || type == "spread") return cont(noComma ? expressionNoComma : expression);
   if (type == "[") return cont(pushlex("]"), arrayLiteral, poplex, maybeop);
   if (type == "{") return contCommasep(objprop, "}", null, maybeop);
   if (type == "quasi") return pass(quasi, maybeop);
   if (type == "new") return cont(maybeTarget(noComma));
   if (type == "import") return cont(expression);
   return cont();
 }
 function maybeexpression(type) {
   if (type.match(/[;\}\)\],]/)) return pass();
   return pass(expression);
 }

 function maybeoperatorComma(type, value) {
   if (type == ",") return cont(maybeexpression);
   return maybeoperatorNoComma(type, value, false);
 }
 function maybeoperatorNoComma(type, value, noComma) {
   var me = noComma == false ? maybeoperatorComma : maybeoperatorNoComma;
   var expr = noComma == false ? expression : expressionNoComma;
   if (type == "=>") return cont(pushcontext, noComma ? arrowBodyNoComma : arrowBody, popcontext);
   if (type == "operator") {
     if (/\+\+|--/.test(value) || isTS && value == "!") return cont(me);
     if (isTS && value == "<" && cx.stream.match(/^([^<>]|<[^<>]*>)*>\s*\(/, false))
       return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, me);
     if (value == "?") return cont(expression, expect(":"), expr);
     return cont(expr);
   }
   if (type == "quasi") { return pass(quasi, me); }
   if (type == ";") return;
   if (type == "(") return contCommasep(expressionNoComma, ")", "call", me);
   if (type == ".") return cont(property, me);
   if (type == "[") return cont(pushlex("]"), maybeexpression, expect("]"), poplex, me);
   if (isTS && value == "as") { cx.marked = "keyword"; return cont(typeexpr, me) }
   if (type == "regexp") {
     cx.state.lastType = cx.marked = "operator"
     cx.stream.backUp(cx.stream.pos - cx.stream.start - 1)
     return cont(expr)
   }
 }
 function quasi(type, value) {
   if (type != "quasi") return pass();
   if (value.slice(value.length - 2) != "${") return cont(quasi);
   return cont(expression, continueQuasi);
 }
 function continueQuasi(type) {
   if (type == "}") {
     cx.marked = "string-2";
     cx.state.tokenize = tokenQuasi;
     return cont(quasi);
   }
 }
 function arrowBody(type) {
   findFatArrow(cx.stream, cx.state);
   return pass(type == "{" ? statement : expression);
 }
 function arrowBodyNoComma(type) {
   findFatArrow(cx.stream, cx.state);
   return pass(type == "{" ? statement : expressionNoComma);
 }
 function maybeTarget(noComma) {
   return function(type) {
     if (type == ".") return cont(noComma ? targetNoComma : target);
     else if (type == "variable" && isTS) return cont(maybeTypeArgs, noComma ? maybeoperatorNoComma : maybeoperatorComma)
     else return pass(noComma ? expressionNoComma : expression);
   };
 }
 function target(_, value) {
   if (value == "target") { cx.marked = "keyword"; return cont(maybeoperatorComma); }
 }
 function targetNoComma(_, value) {
   if (value == "target") { cx.marked = "keyword"; return cont(maybeoperatorNoComma); }
 }
 function maybelabel(type) {
   if (type == ":") return cont(poplex, statement);
   return pass(maybeoperatorComma, expect(";"), poplex);
 }
 function property(type) {
   if (type == "variable") {cx.marked = "property"; return cont();}
 }
 function objprop(type, value) {
   if (type == "async") {
     cx.marked = "property";
     return cont(objprop);
   } else if (type == "variable" || cx.style == "keyword") {
     cx.marked = "property";
     if (value == "get" || value == "set") return cont(getterSetter);
     var m // Work around fat-arrow-detection complication for detecting typescript typed arrow params
     if (isTS && cx.state.fatArrowAt == cx.stream.start && (m = cx.stream.match(/^\s*:\s*/, false)))
       cx.state.fatArrowAt = cx.stream.pos + m[0].length
     return cont(afterprop);
   } else if (type == "number" || type == "string") {
     cx.marked = jsonldMode ? "property" : (cx.style + " property");
     return cont(afterprop);
   } else if (type == "jsonld-keyword") {
     return cont(afterprop);
   } else if (isTS && isModifier(value)) {
     cx.marked = "keyword"
     return cont(objprop)
   } else if (type == "[") {
     return cont(expression, maybetype, expect("]"), afterprop);
   } else if (type == "spread") {
     return cont(expressionNoComma, afterprop);
   } else if (value == "*") {
     cx.marked = "keyword";
     return cont(objprop);
   } else if (type == ":") {
     return pass(afterprop)
   }
 }
 function getterSetter(type) {
   if (type != "variable") return pass(afterprop);
   cx.marked = "property";
   return cont(functiondef);
 }
 function afterprop(type) {
   if (type == ":") return cont(expressionNoComma);
   if (type == "(") return pass(functiondef);
 }
 function commasep(what, end, sep) {
   function proceed(type, value) {
     if (sep ? sep.indexOf(type) > -1 : type == ",") {
       var lex = cx.state.lexical;
       if (lex.info == "call") lex.pos = (lex.pos || 0) + 1;
       return cont(function(type, value) {
         if (type == end || value == end) return pass()
         return pass(what)
       }, proceed);
     }
     if (type == end || value == end) return cont();
     if (sep && sep.indexOf(";") > -1) return pass(what)
     return cont(expect(end));
   }
   return function(type, value) {
     if (type == end || value == end) return cont();
     return pass(what, proceed);
   };
 }
 function contCommasep(what, end, info) {
   for (var i = 3; i < arguments.length; i++)
     cx.cc.push(arguments[i]);
   return cont(pushlex(end, info), commasep(what, end), poplex);
 }
 function block(type) {
   if (type == "}") return cont();
   return pass(statement, block);
 }
 function maybetype(type, value) {
   if (isTS) {
     if (type == ":") return cont(typeexpr);
     if (value == "?") return cont(maybetype);
   }
 }
 function maybetypeOrIn(type, value) {
   if (isTS && (type == ":" || value == "in")) return cont(typeexpr)
 }
 function mayberettype(type) {
   if (isTS && type == ":") {
     if (cx.stream.match(/^\s*\w+\s+is\b/, false)) return cont(expression, isKW, typeexpr)
     else return cont(typeexpr)
   }
 }
 function isKW(_, value) {
   if (value == "is") {
     cx.marked = "keyword"
     return cont()
   }
 }
 function typeexpr(type, value) {
   if (value == "keyof" || value == "typeof" || value == "infer") {
     cx.marked = "keyword"
     return cont(value == "typeof" ? expressionNoComma : typeexpr)
   }
   if (type == "variable" || value == "void") {
     cx.marked = "type"
     return cont(afterType)
   }
   if (value == "|" || value == "&") return cont(typeexpr)
   if (type == "string" || type == "number" || type == "atom") return cont(afterType);
   if (type == "[") return cont(pushlex("]"), commasep(typeexpr, "]", ","), poplex, afterType)
   if (type == "{") return cont(pushlex("}"), commasep(typeprop, "}", ",;"), poplex, afterType)
   if (type == "(") return cont(commasep(typearg, ")"), maybeReturnType, afterType)
   if (type == "<") return cont(commasep(typeexpr, ">"), typeexpr)
 }
 function maybeReturnType(type) {
   if (type == "=>") return cont(typeexpr)
 }
 function typeprop(type, value) {
   if (type == "variable" || cx.style == "keyword") {
     cx.marked = "property"
     return cont(typeprop)
   } else if (value == "?" || type == "number" || type == "string") {
     return cont(typeprop)
   } else if (type == ":") {
     return cont(typeexpr)
   } else if (type == "[") {
     return cont(expect("variable"), maybetypeOrIn, expect("]"), typeprop)
   } else if (type == "(") {
     return pass(functiondecl, typeprop)
   }
 }
 function typearg(type, value) {
   if (type == "variable" && cx.stream.match(/^\s*[?:]/, false) || value == "?") return cont(typearg)
   if (type == ":") return cont(typeexpr)
   if (type == "spread") return cont(typearg)
   return pass(typeexpr)
 }
 function afterType(type, value) {
   if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, afterType)
   if (value == "|" || type == "." || value == "&") return cont(typeexpr)
   if (type == "[") return cont(typeexpr, expect("]"), afterType)
   if (value == "extends" || value == "implements") { cx.marked = "keyword"; return cont(typeexpr) }
   if (value == "?") return cont(typeexpr, expect(":"), typeexpr)
 }
 function maybeTypeArgs(_, value) {
   if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, afterType)
 }
 function typeparam() {
   return pass(typeexpr, maybeTypeDefault)
 }
 function maybeTypeDefault(_, value) {
   if (value == "=") return cont(typeexpr)
 }
 function vardef(_, value) {
   if (value == "enum") {cx.marked = "keyword"; return cont(enumdef)}
   return pass(pattern, maybetype, maybeAssign, vardefCont);
 }
 function pattern(type, value) {
   if (isTS && isModifier(value)) { cx.marked = "keyword"; return cont(pattern) }
   if (type == "variable") { register(value); return cont(); }
   if (type == "spread") return cont(pattern);
   if (type == "[") return contCommasep(eltpattern, "]");
   if (type == "{") return contCommasep(proppattern, "}");
 }
 function proppattern(type, value) {
   if (type == "variable" && !cx.stream.match(/^\s*:/, false)) {
     register(value);
     return cont(maybeAssign);
   }
   if (type == "variable") cx.marked = "property";
   if (type == "spread") return cont(pattern);
   if (type == "}") return pass();
   if (type == "[") return cont(expression, expect(']'), expect(':'), proppattern);
   return cont(expect(":"), pattern, maybeAssign);
 }
 function eltpattern() {
   return pass(pattern, maybeAssign)
 }
 function maybeAssign(_type, value) {
   if (value == "=") return cont(expressionNoComma);
 }
 function vardefCont(type) {
   if (type == ",") return cont(vardef);
 }
 function maybeelse(type, value) {
   if (type == "keyword b" && value == "else") return cont(pushlex("form", "else"), statement, poplex);
 }
 function forspec(type, value) {
   if (value == "await") return cont(forspec);
   if (type == "(") return cont(pushlex(")"), forspec1, poplex);
 }
 function forspec1(type) {
   if (type == "var") return cont(vardef, forspec2);
   if (type == "variable") return cont(forspec2);
   return pass(forspec2)
 }
 function forspec2(type, value) {
   if (type == ")") return cont()
   if (type == ";") return cont(forspec2)
   if (value == "in" || value == "of") { cx.marked = "keyword"; return cont(expression, forspec2) }
   return pass(expression, forspec2)
 }
 function functiondef(type, value) {
   if (value == "*") {cx.marked = "keyword"; return cont(functiondef);}
   if (type == "variable") {register(value); return cont(functiondef);}
   if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, mayberettype, statement, popcontext);
   if (isTS && value == "<") return cont(pushlex(">"), commasep(typeparam, ">"), poplex, functiondef)
 }
 function functiondecl(type, value) {
   if (value == "*") {cx.marked = "keyword"; return cont(functiondecl);}
   if (type == "variable") {register(value); return cont(functiondecl);}
   if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, mayberettype, popcontext);
   if (isTS && value == "<") return cont(pushlex(">"), commasep(typeparam, ">"), poplex, functiondecl)
 }
 function typename(type, value) {
   if (type == "keyword" || type == "variable") {
     cx.marked = "type"
     return cont(typename)
   } else if (value == "<") {
     return cont(pushlex(">"), commasep(typeparam, ">"), poplex)
   }
 }
 function funarg(type, value) {
   if (value == "@") cont(expression, funarg)
   if (type == "spread") return cont(funarg);
   if (isTS && isModifier(value)) { cx.marked = "keyword"; return cont(funarg); }
   if (isTS && type == "this") return cont(maybetype, maybeAssign)
   return pass(pattern, maybetype, maybeAssign);
 }
 function classExpression(type, value) {
   // Class expressions may have an optional name.
   if (type == "variable") return className(type, value);
   return classNameAfter(type, value);
 }
 function className(type, value) {
   if (type == "variable") {register(value); return cont(classNameAfter);}
 }
 function classNameAfter(type, value) {
   if (value == "<") return cont(pushlex(">"), commasep(typeparam, ">"), poplex, classNameAfter)
   if (value == "extends" || value == "implements" || (isTS && type == ",")) {
     if (value == "implements") cx.marked = "keyword";
     return cont(isTS ? typeexpr : expression, classNameAfter);
   }
   if (type == "{") return cont(pushlex("}"), classBody, poplex);
 }
 function classBody(type, value) {
   if (type == "async" ||
       (type == "variable" &&
        (value == "static" || value == "get" || value == "set" || (isTS && isModifier(value))) &&
        cx.stream.match(/^\s+[\w$\xa1-\uffff]/, false))) {
     cx.marked = "keyword";
     return cont(classBody);
   }
   if (type == "variable" || cx.style == "keyword") {
     cx.marked = "property";
     return cont(classfield, classBody);
   }
   if (type == "number" || type == "string") return cont(classfield, classBody);
   if (type == "[")
     return cont(expression, maybetype, expect("]"), classfield, classBody)
   if (value == "*") {
     cx.marked = "keyword";
     return cont(classBody);
   }
   if (isTS && type == "(") return pass(functiondecl, classBody)
   if (type == ";" || type == ",") return cont(classBody);
   if (type == "}") return cont();
   if (value == "@") return cont(expression, classBody)
 }
 function classfield(type, value) {
   if (value == "?") return cont(classfield)
   if (type == ":") return cont(typeexpr, maybeAssign)
   if (value == "=") return cont(expressionNoComma)
   var context = cx.state.lexical.prev, isInterface = context && context.info == "interface"
   return pass(isInterface ? functiondecl : functiondef)
 }
 function afterExport(type, value) {
   if (value == "*") { cx.marked = "keyword"; return cont(maybeFrom, expect(";")); }
   if (value == "default") { cx.marked = "keyword"; return cont(expression, expect(";")); }
   if (type == "{") return cont(commasep(exportField, "}"), maybeFrom, expect(";"));
   return pass(statement);
 }
 function exportField(type, value) {
   if (value == "as") { cx.marked = "keyword"; return cont(expect("variable")); }
   if (type == "variable") return pass(expressionNoComma, exportField);
 }
 function afterImport(type) {
   if (type == "string") return cont();
   if (type == "(") return pass(expression);
   return pass(importSpec, maybeMoreImports, maybeFrom);
 }
 function importSpec(type, value) {
   if (type == "{") return contCommasep(importSpec, "}");
   if (type == "variable") register(value);
   if (value == "*") cx.marked = "keyword";
   return cont(maybeAs);
 }
 function maybeMoreImports(type) {
   if (type == ",") return cont(importSpec, maybeMoreImports)
 }
 function maybeAs(_type, value) {
   if (value == "as") { cx.marked = "keyword"; return cont(importSpec); }
 }
 function maybeFrom(_type, value) {
   if (value == "from") { cx.marked = "keyword"; return cont(expression); }
 }
 function arrayLiteral(type) {
   if (type == "]") return cont();
   return pass(commasep(expressionNoComma, "]"));
 }
 function enumdef() {
   return pass(pushlex("form"), pattern, expect("{"), pushlex("}"), commasep(enummember, "}"), poplex, poplex)
 }
 function enummember() {
   return pass(pattern, maybeAssign);
 }

 function isContinuedStatement(state, textAfter) {
   return state.lastType == "operator" || state.lastType == "," ||
     isOperatorChar.test(textAfter.charAt(0)) ||
     /[,.]/.test(textAfter.charAt(0));
 }

 function expressionAllowed(stream, state, backUp) {
   return state.tokenize == tokenBase &&
     /^(?:operator|sof|keyword [bcd]|case|new|export|default|spread|[\[{}\(,;:]|=>)$/.test(state.lastType) ||
     (state.lastType == "quasi" && /\{\s*$/.test(stream.string.slice(0, stream.pos - (backUp || 0))))
 }

 // Interface

 return {
   startState: function(basecolumn) {
     var state = {
       tokenize: tokenBase,
       lastType: "sof",
       cc: [],
       lexical: new JSLexical((basecolumn || 0) - indentUnit, 0, "block", false),
       localVars: parserConfig.localVars,
       context: parserConfig.localVars && new Context(null, null, false),
       indented: basecolumn || 0
     };
     if (parserConfig.globalVars && typeof parserConfig.globalVars == "object")
       state.globalVars = parserConfig.globalVars;
     return state;
   },

   token: function(stream, state) {
     if (stream.sol()) {
       if (!state.lexical.hasOwnProperty("align"))
         state.lexical.align = false;
       state.indented = stream.indentation();
       findFatArrow(stream, state);
     }
     if (state.tokenize != tokenComment && stream.eatSpace()) return null;
     var style = state.tokenize(stream, state);
     if (type == "comment") return style;
     state.lastType = type == "operator" && (content == "++" || content == "--") ? "incdec" : type;
     return parseJS(state, style, type, content, stream);
   },

   indent: function(state, textAfter) {
     if (state.tokenize == tokenComment || state.tokenize == tokenQuasi) return CodeMirror.Pass;
     if (state.tokenize != tokenBase) return 0;
     var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical, top
     // Kludge to prevent 'maybelse' from blocking lexical scope pops
     if (!/^\s*else\b/.test(textAfter)) for (var i = state.cc.length - 1; i >= 0; --i) {
       var c = state.cc[i];
       if (c == poplex) lexical = lexical.prev;
       else if (c != maybeelse) break;
     }
     while ((lexical.type == "stat" || lexical.type == "form") &&
            (firstChar == "}" || ((top = state.cc[state.cc.length - 1]) &&
                                  (top == maybeoperatorComma || top == maybeoperatorNoComma) &&
                                  !/^[,\.=+\-*:?[\(]/.test(textAfter))))
       lexical = lexical.prev;
     if (statementIndent && lexical.type == ")" && lexical.prev.type == "stat")
       lexical = lexical.prev;
     var type = lexical.type, closing = firstChar == type;

     if (type == "vardef") return lexical.indented + (state.lastType == "operator" || state.lastType == "," ? lexical.info.length + 1 : 0);
     else if (type == "form" && firstChar == "{") return lexical.indented;
     else if (type == "form") return lexical.indented + indentUnit;
     else if (type == "stat")
       return lexical.indented + (isContinuedStatement(state, textAfter) ? statementIndent || indentUnit : 0);
     else if (lexical.info == "switch" && !closing && parserConfig.doubleIndentSwitch != false)
       return lexical.indented + (/^(?:case|default)\b/.test(textAfter) ? indentUnit : 2 * indentUnit);
     else if (lexical.align) return lexical.column + (closing ? 0 : 1);
     else return lexical.indented + (closing ? 0 : indentUnit);
   },

   electricInput: /^\s*(?:case .*?:|default:|\{|\})$/,
   blockCommentStart: jsonMode ? null : "/*",
   blockCommentEnd: jsonMode ? null : "*/",
   blockCommentContinue: jsonMode ? null : " * ",
   lineComment: jsonMode ? null : "//",
   fold: "brace",
   closeBrackets: "()[]{}''\"\"``",

   helperType: jsonMode ? "json" : "javascript",
   jsonldMode: jsonldMode,
   jsonMode: jsonMode,

   expressionAllowed: expressionAllowed,

   skipExpression: function(state) {
     var top = state.cc[state.cc.length - 1]
     if (top == expression || top == expressionNoComma) state.cc.pop()
   }
 };
});

CodeMirror.registerHelper("wordChars", "javascript", /[\w$]/);

CodeMirror.defineMIME("text/javascript", "javascript");
CodeMirror.defineMIME("text/ecmascript", "javascript");
CodeMirror.defineMIME("application/javascript", "javascript");
CodeMirror.defineMIME("application/x-javascript", "javascript");
CodeMirror.defineMIME("application/ecmascript", "javascript");
CodeMirror.defineMIME("application/json", {name: "javascript", json: true});
CodeMirror.defineMIME("application/x-json", {name: "javascript", json: true});
CodeMirror.defineMIME("application/ld+json", {name: "javascript", jsonld: true});
CodeMirror.defineMIME("text/typescript", { name: "javascript", typescript: true });
CodeMirror.defineMIME("application/typescript", { name: "javascript", typescript: true });

});