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

// TODO actually recognize syntax of TypeScript constructs

(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);
    // Plain browser env
    else mod(CodeMirror);
})(function (CodeMirror) {
    "use strict";

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

    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");
            var operator = kw("operator"),
                atom = { type: "atom", style: "atom" };

            var jsKeywords = {
                if: kw("if"),
                while: A,
                with: A,
                else: B,
                do: B,
                try: B,
                finally: B,
                return: C,
                break: C,
                continue: C,
                new: kw("new"),
                delete: C,
                throw: C,
                debugger: C,
                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,
            };

            // Extend the 'normal' keywords with the TypeScript language extensions
            if (isTS) {
                var type = { type: "variable", style: "variable-3" };
                var tsKeywords = {
                    // object-like things
                    interface: kw("class"),
                    implements: C,
                    namespace: C,
                    module: kw("module"),
                    enum: kw("module"),

                    // scope modifiers
                    public: kw("modifier"),
                    private: kw("modifier"),
                    protected: kw("modifier"),
                    abstract: kw("modifier"),

                    // operators
                    as: operator,

                    // types
                    string: type,
                    number: type,
                    boolean: type,
                    any: type,
                };

                for (var attr in tsKeywords) {
                    jsKeywords[attr] = tsKeywords[attr];
                }
            }

            return jsKeywords;
        })();

        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+(?:[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.eat(/x/i)) {
                stream.eatWhile(/[\da-f]/i);
                return ret("number", "number");
            } else if (ch == "0" && stream.eat(/o/i)) {
                stream.eatWhile(/[0-7]/i);
                return ret("number", "number");
            } else if (ch == "0" && stream.eat(/b/i)) {
                stream.eatWhile(/[01]/i);
                return ret("number", "number");
            } else if (/\d/.test(ch)) {
                stream.match(/^\d*(?:\.\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(([gimyu])(?![gimyu]*\2))+\b/);
                    return ret("regexp", "string-2");
                } else {
                    stream.eatWhile(isOperatorChar);
                    return ret("operator", "operator", stream.current());
                }
            } else if (ch == "`") {
                state.tokenize = tokenQuasi;
                return tokenQuasi(stream, state);
            } else if (ch == "#") {
                stream.skipToEnd();
                return ret("error", "error");
            } else if (isOperatorChar.test(ch)) {
                stream.eatWhile(isOperatorChar);
                return ret("operator", "operator", stream.current());
            } else if (wordRE.test(ch)) {
                stream.eatWhile(wordRE);
                var word = stream.current(),
                    known = keywords.propertyIsEnumerable(word) && keywords[word];
                return known && state.lastType != "."
                    ? ret(known.type, known.style, word)
                    : 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;

            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) break;
                } else if (bracket >= 3 && bracket < 6) {
                    ++depth;
                } else if (wordRE.test(ch)) {
                    sawSomething = true;
                } else if (/["'\/]/.test(ch)) {
                    return;
                } 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 register(varname) {
            function inList(list) {
                for (var v = list; v; v = v.next) if (v.name == varname) return true;
                return false;
            }
            var state = cx.state;
            cx.marked = "def";
            if (state.context) {
                if (inList(state.localVars)) return;
                state.localVars = { name: varname, next: state.localVars };
            } else {
                if (inList(state.globalVars)) return;
                if (parserConfig.globalVars)
                    state.globalVars = { name: varname, next: state.globalVars };
            }
        }

        // Combinators

        var defaultVars = { name: "this", next: { name: "arguments" } };
        function pushcontext() {
            cx.state.context = { prev: cx.state.context, vars: cx.state.localVars };
            cx.state.localVars = defaultVars;
        }
        function popcontext() {
            cx.state.localVars = cx.state.context.vars;
            cx.state.context = cx.state.context.prev;
        }
        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 == ";") return pass();
                else return cont(exp);
            }
            return exp;
        }

        function statement(type, value) {
            if (type == "var")
                return cont(pushlex("vardef", value.length), vardef, expect(";"), poplex);
            if (type == "keyword a") return cont(pushlex("form"), expression, statement, poplex);
            if (type == "keyword b") return cont(pushlex("form"), statement, poplex);
            if (type == "{") return cont(pushlex("}"), block, poplex);
            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"), expression, statement, poplex, maybeelse);
            }
            if (type == "function") return cont(functiondef);
            if (type == "for") return cont(pushlex("form"), forspec, statement, poplex);
            if (type == "variable") return cont(pushlex("stat"), maybelabel);
            if (type == "switch")
                return cont(
                    pushlex("form"),
                    expression,
                    pushlex("}", "switch"),
                    expect("{"),
                    block,
                    poplex,
                    poplex
                );
            if (type == "case") return cont(expression, expect(":"));
            if (type == "default") return cont(expect(":"));
            if (type == "catch")
                return cont(
                    pushlex("form"),
                    pushcontext,
                    expect("("),
                    funarg,
                    expect(")"),
                    statement,
                    poplex,
                    popcontext
                );
            if (type == "class") return cont(pushlex("form"), className, poplex);
            if (type == "export") return cont(pushlex("stat"), afterExport, poplex);
            if (type == "import") return cont(pushlex("stat"), afterImport, poplex);
            if (type == "module")
                return cont(
                    pushlex("form"),
                    pattern,
                    pushlex("}"),
                    expect("{"),
                    block,
                    poplex,
                    poplex
                );
            return pass(pushlex("stat"), expression, expect(";"), poplex);
        }
        function expression(type) {
            return expressionInner(type, false);
        }
        function expressionNoComma(type) {
            return expressionInner(type, true);
        }
        function expressionInner(type, noComma) {
            if (cx.state.fatArrowAt == cx.stream.start) {
                var body = noComma ? arrowBodyNoComma : arrowBody;
                if (type == "(")
                    return cont(
                        pushcontext,
                        pushlex(")"),
                        commasep(pattern, ")"),
                        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 == "keyword c")
                return cont(noComma ? maybeexpressionNoComma : maybeexpression);
            if (type == "(")
                return cont(
                    pushlex(")"),
                    maybeexpression,
                    comprehension,
                    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));
            return cont();
        }
        function maybeexpression(type) {
            if (type.match(/[;\}\)\],]/)) return pass();
            return pass(expression);
        }
        function maybeexpressionNoComma(type) {
            if (type.match(/[;\}\)\],]/)) return pass();
            return pass(expressionNoComma);
        }

        function maybeoperatorComma(type, value) {
            if (type == ",") return cont(expression);
            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)) return cont(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);
        }
        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 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 == "variable" || cx.style == "keyword") {
                cx.marked = "property";
                if (value == "get" || value == "set") return cont(getterSetter);
                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 (type == "modifier") {
                return cont(objprop);
            } else if (type == "[") {
                return cont(expression, expect("]"), afterprop);
            } else if (type == "spread") {
                return cont(expression);
            }
        }
        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) {
            function proceed(type) {
                if (type == ",") {
                    var lex = cx.state.lexical;
                    if (lex.info == "call") lex.pos = (lex.pos || 0) + 1;
                    return cont(what, proceed);
                }
                if (type == end) return cont();
                return cont(expect(end));
            }
            return function (type) {
                if (type == 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) {
            if (isTS && type == ":") return cont(typedef);
        }
        function maybedefault(_, value) {
            if (value == "=") return cont(expressionNoComma);
        }
        function typedef(type) {
            if (type == "variable") {
                cx.marked = "variable-3";
                return cont();
            }
        }
        function vardef() {
            return pass(pattern, maybetype, maybeAssign, vardefCont);
        }
        function pattern(type, value) {
            if (type == "modifier") return cont(pattern);
            if (type == "variable") {
                register(value);
                return cont();
            }
            if (type == "spread") return cont(pattern);
            if (type == "[") return contCommasep(pattern, "]");
            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();
            return cont(expect(":"), 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) {
            if (type == "(") return cont(pushlex(")"), forspec1, expect(")"), poplex);
        }
        function forspec1(type) {
            if (type == "var") return cont(vardef, expect(";"), forspec2);
            if (type == ";") return cont(forspec2);
            if (type == "variable") return cont(formaybeinof);
            return pass(expression, expect(";"), forspec2);
        }
        function formaybeinof(_type, value) {
            if (value == "in" || value == "of") {
                cx.marked = "keyword";
                return cont(expression);
            }
            return cont(maybeoperatorComma, forspec2);
        }
        function forspec2(type, value) {
            if (type == ";") return cont(forspec3);
            if (value == "in" || value == "of") {
                cx.marked = "keyword";
                return cont(expression);
            }
            return pass(expression, expect(";"), forspec3);
        }
        function forspec3(type) {
            if (type != ")") cont(expression);
        }
        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,
                    statement,
                    popcontext
                );
        }
        function funarg(type) {
            if (type == "spread") return cont(funarg);
            return pass(pattern, maybetype, maybedefault);
        }
        function className(type, value) {
            if (type == "variable") {
                register(value);
                return cont(classNameAfter);
            }
        }
        function classNameAfter(type, value) {
            if (value == "extends") return cont(expression, classNameAfter);
            if (type == "{") return cont(pushlex("}"), classBody, poplex);
        }
        function classBody(type, value) {
            if (type == "variable" || cx.style == "keyword") {
                if (value == "static") {
                    cx.marked = "keyword";
                    return cont(classBody);
                }
                cx.marked = "property";
                if (value == "get" || value == "set")
                    return cont(classGetterSetter, functiondef, classBody);
                return cont(functiondef, classBody);
            }
            if (value == "*") {
                cx.marked = "keyword";
                return cont(classBody);
            }
            if (type == ";") return cont(classBody);
            if (type == "}") return cont();
        }
        function classGetterSetter(type) {
            if (type != "variable") return pass();
            cx.marked = "property";
            return cont();
        }
        function afterExport(_type, value) {
            if (value == "*") {
                cx.marked = "keyword";
                return cont(maybeFrom, expect(";"));
            }
            if (value == "default") {
                cx.marked = "keyword";
                return cont(expression, expect(";"));
            }
            return pass(statement);
        }
        function afterImport(type) {
            if (type == "string") return cont();
            return pass(importSpec, maybeFrom);
        }
        function importSpec(type, value) {
            if (type == "{") return contCommasep(importSpec, "}");
            if (type == "variable") register(value);
            if (value == "*") cx.marked = "keyword";
            return cont(maybeAs);
        }
        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(expressionNoComma, maybeArrayComprehension);
        }
        function maybeArrayComprehension(type) {
            if (type == "for") return pass(comprehension, expect("]"));
            if (type == ",") return cont(commasep(maybeexpressionNoComma, "]"));
            return pass(commasep(expressionNoComma, "]"));
        }
        function comprehension(type) {
            if (type == "for") return cont(forspec, comprehension);
            if (type == "if") return cont(expression, comprehension);
        }

        function isContinuedStatement(state, textAfter) {
            return (
                state.lastType == "operator" ||
                state.lastType == "," ||
                isOperatorChar.test(textAfter.charAt(0)) ||
                /[,.]/.test(textAfter.charAt(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 && { vars: parserConfig.localVars },
                    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) return CodeMirror.Pass;
                if (state.tokenize != tokenBase) return 0;
                var firstChar = textAfter && textAfter.charAt(0),
                    lexical = state.lexical;
                // 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;
                    }
                if (lexical.type == "stat" && firstChar == "}") 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 + 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 : "*/",
            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 });
});
