'use strict';

function Context(indented, column, type, info, align, prev) {
  this.indented = indented;
  this.column = column;
  this.type = type;
  this.info = info;
  this.align = align;
  this.prev = prev;
}
function pushContext(state, col, type, info) {
  var indent = state.indented;
  if (state.context && state.context.type == "statement" && type != "statement")
    indent = state.context.indented;
  return state.context = new Context(indent, col, type, info, null, state.context);
}
function popContext(state) {
  var t = state.context.type;
  if (t == ")" || t == "]" || t == "}")
    state.indented = state.context.indented;
  return state.context = state.context.prev;
}

function typeBefore(stream, state, pos) {
  if (state.prevToken == "variable" || state.prevToken == "type") return true;
  if (/\S(?:[^- ]>|[*\]])\s*$|\*$/.test(stream.string.slice(0, pos))) return true;
  if (state.typeAtEndOfLine && stream.column() == stream.indentation()) return true;
}

function isTopScope(context) {
  for (;;) {
    if (!context || context.type == "top") return true;
    if (context.type == "}" && context.prev.info != "namespace") return false;
    context = context.prev;
  }
}

function clike(parserConfig) {
  var statementIndentUnit = parserConfig.statementIndentUnit,
      dontAlignCalls = parserConfig.dontAlignCalls,
      keywords = parserConfig.keywords || {},
      types = parserConfig.types || {},
      builtin = parserConfig.builtin || {},
      blockKeywords = parserConfig.blockKeywords || {},
      defKeywords = parserConfig.defKeywords || {},
      atoms = parserConfig.atoms || {},
      hooks = parserConfig.hooks || {},
      multiLineStrings = parserConfig.multiLineStrings,
      indentStatements = parserConfig.indentStatements !== false,
      indentSwitch = parserConfig.indentSwitch !== false,
      namespaceSeparator = parserConfig.namespaceSeparator,
      isPunctuationChar = parserConfig.isPunctuationChar || /[\[\]{}\(\),;\:\.]/,
      numberStart = parserConfig.numberStart || /[\d\.]/,
      number = parserConfig.number || /^(?:0x[a-f\d]+|0b[01]+|(?:\d+\.?\d*|\.\d+)(?:e[-+]?\d+)?)(u|ll?|l|f)?/i,
      isOperatorChar = parserConfig.isOperatorChar || /[+\-*&%=<>!?|\/]/,
      isIdentifierChar = parserConfig.isIdentifierChar || /[\w\$_\xa1-\uffff]/,
      // An optional function that takes a {string} token and returns true if it
      // should be treated as a builtin.
      isReservedIdentifier = parserConfig.isReservedIdentifier || false;

  var curPunc, isDefKeyword;

  function tokenBase(stream, state) {
    var ch = stream.next();
    if (hooks[ch]) {
      var result = hooks[ch](stream, state);
      if (result !== false) return result;
    }
    if (ch == '"' || ch == "'") {
      state.tokenize = tokenString(ch);
      return state.tokenize(stream, state);
    }
    if (numberStart.test(ch)) {
      stream.backUp(1);
      if (stream.match(number)) return "number"
      stream.next();
    }
    if (isPunctuationChar.test(ch)) {
      curPunc = ch;
      return null;
    }
    if (ch == "/") {
      if (stream.eat("*")) {
        state.tokenize = tokenComment;
        return tokenComment(stream, state);
      }
      if (stream.eat("/")) {
        stream.skipToEnd();
        return "comment";
      }
    }
    if (isOperatorChar.test(ch)) {
      while (!stream.match(/^\/[\/*]/, false) && stream.eat(isOperatorChar)) {}
      return "operator";
    }
    stream.eatWhile(isIdentifierChar);
    if (namespaceSeparator) while (stream.match(namespaceSeparator))
      stream.eatWhile(isIdentifierChar);

    var cur = stream.current();
    if (contains(keywords, cur)) {
      if (contains(blockKeywords, cur)) curPunc = "newstatement";
      if (contains(defKeywords, cur)) isDefKeyword = true;
      return "keyword";
    }
    if (contains(types, cur)) return "type";
    if (contains(builtin, cur)
        || (isReservedIdentifier && isReservedIdentifier(cur))) {
      if (contains(blockKeywords, cur)) curPunc = "newstatement";
      return "builtin";
    }
    if (contains(atoms, cur)) return "atom";
    return "variable";
  }

  function tokenString(quote) {
    return function(stream, state) {
      var escaped = false, next, end = false;
      while ((next = stream.next()) != null) {
        if (next == quote && !escaped) {end = true; break;}
        escaped = !escaped && next == "\\";
      }
      if (end || !(escaped || multiLineStrings))
        state.tokenize = null;
      return "string";
    };
  }

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

  function maybeEOL(stream, state) {
    if (parserConfig.typeFirstDefinitions && stream.eol() && isTopScope(state.context))
      state.typeAtEndOfLine = typeBefore(stream, state, stream.pos);
  }

  // Interface

  return {
    startState: function(indentUnit) {
      return {
        tokenize: null,
        context: new Context(-indentUnit, 0, "top", null, false),
        indented: 0,
        startOfLine: true,
        prevToken: null
      };
    },

    token: function(stream, state) {
      var ctx = state.context;
      if (stream.sol()) {
        if (ctx.align == null) ctx.align = false;
        state.indented = stream.indentation();
        state.startOfLine = true;
      }
      if (stream.eatSpace()) { maybeEOL(stream, state); return null; }
      curPunc = isDefKeyword = null;
      var style = (state.tokenize || tokenBase)(stream, state);
      if (style == "comment" || style == "meta") return style;
      if (ctx.align == null) ctx.align = true;

      if (curPunc == ";" || curPunc == ":" || (curPunc == "," && stream.match(/^\s*(?:\/\/.*)?$/, false)))
        while (state.context.type == "statement") popContext(state);
      else if (curPunc == "{") pushContext(state, stream.column(), "}");
      else if (curPunc == "[") pushContext(state, stream.column(), "]");
      else if (curPunc == "(") pushContext(state, stream.column(), ")");
      else if (curPunc == "}") {
        while (ctx.type == "statement") ctx = popContext(state);
        if (ctx.type == "}") ctx = popContext(state);
        while (ctx.type == "statement") ctx = popContext(state);
      }
      else if (curPunc == ctx.type) popContext(state);
      else if (indentStatements &&
               (((ctx.type == "}" || ctx.type == "top") && curPunc != ";") ||
                (ctx.type == "statement" && curPunc == "newstatement"))) {
        pushContext(state, stream.column(), "statement", stream.current());
      }

      if (style == "variable" &&
          ((state.prevToken == "def" ||
            (parserConfig.typeFirstDefinitions && typeBefore(stream, state, stream.start) &&
             isTopScope(state.context) && stream.match(/^\s*\(/, false)))))
        style = "def";

      if (hooks.token) {
        var result = hooks.token(stream, state, style);
        if (result !== undefined) style = result;
      }

      if (style == "def" && parserConfig.styleDefs === false) style = "variable";

      state.startOfLine = false;
      state.prevToken = isDefKeyword ? "def" : style || curPunc;
      maybeEOL(stream, state);
      return style;
    },

    indent: function(state, textAfter, context) {
      if (state.tokenize != tokenBase && state.tokenize != null || state.typeAtEndOfLine) return null;
      var ctx = state.context, firstChar = textAfter && textAfter.charAt(0);
      var closing = firstChar == ctx.type;
      if (ctx.type == "statement" && firstChar == "}") ctx = ctx.prev;
      if (parserConfig.dontIndentStatements)
        while (ctx.type == "statement" && parserConfig.dontIndentStatements.test(ctx.info))
          ctx = ctx.prev;
      if (hooks.indent) {
        var hook = hooks.indent(state, ctx, textAfter, context.unit);
        if (typeof hook == "number") return hook
      }
      var switchBlock = ctx.prev && ctx.prev.info == "switch";
      if (parserConfig.allmanIndentation && /[{(]/.test(firstChar)) {
        while (ctx.type != "top" && ctx.type != "}") ctx = ctx.prev;
        return ctx.indented
      }
      if (ctx.type == "statement")
        return ctx.indented + (firstChar == "{" ? 0 : statementIndentUnit || context.unit);
      if (ctx.align && (!dontAlignCalls || ctx.type != ")"))
        return ctx.column + (closing ? 0 : 1);
      if (ctx.type == ")" && !closing)
        return ctx.indented + (statementIndentUnit || context.unit);

      return ctx.indented + (closing ? 0 : context.unit) +
        (!closing && switchBlock && !/^(?:case|default)\b/.test(textAfter) ? context.unit : 0);
    },

    languageData: {
      indentOnInput: indentSwitch ? /^\s*(?:case .*?:|default:|\{\}?|\})$/ : /^\s*[{}]$/,
      commentTokens: {line: "//", block: {open: "/*", close: "*/"}},
      autocomplete: Object.keys(keywords).concat(Object.keys(types)).concat(Object.keys(builtin)).concat(Object.keys(atoms)),
      ...parserConfig.languageData
    }
  };
}
function words(str) {
  var obj = {}, words = str.split(" ");
  for (var i = 0; i < words.length; ++i) obj[words[i]] = true;
  return obj;
}
function contains(words, word) {
  if (typeof words === "function") {
    return words(word);
  } else {
    return words.propertyIsEnumerable(word);
  }
}
var cKeywords = "auto if break case register continue return default do sizeof " +
    "static else struct switch extern typedef union for goto while enum const " +
    "volatile inline restrict asm fortran";

// Keywords from https://en.cppreference.com/w/cpp/keyword includes C++20.
var cppKeywords = "alignas alignof and and_eq audit axiom bitand bitor catch " +
    "class compl concept constexpr const_cast decltype delete dynamic_cast " +
    "explicit export final friend import module mutable namespace new noexcept " +
    "not not_eq operator or or_eq override private protected public " +
    "reinterpret_cast requires static_assert static_cast template this " +
    "thread_local throw try typeid typename using virtual xor xor_eq";

var objCKeywords = "bycopy byref in inout oneway out self super atomic nonatomic retain copy " +
    "readwrite readonly strong weak assign typeof nullable nonnull null_resettable _cmd " +
    "@interface @implementation @end @protocol @encode @property @synthesize @dynamic @class " +
    "@public @package @private @protected @required @optional @try @catch @finally @import " +
    "@selector @encode @defs @synchronized @autoreleasepool @compatibility_alias @available";

var objCBuiltins = "FOUNDATION_EXPORT FOUNDATION_EXTERN NS_INLINE NS_FORMAT_FUNCTION " +
    " NS_RETURNS_RETAINEDNS_ERROR_ENUM NS_RETURNS_NOT_RETAINED NS_RETURNS_INNER_POINTER " +
    "NS_DESIGNATED_INITIALIZER NS_ENUM NS_OPTIONS NS_REQUIRES_NIL_TERMINATION " +
    "NS_ASSUME_NONNULL_BEGIN NS_ASSUME_NONNULL_END NS_SWIFT_NAME NS_REFINED_FOR_SWIFT";

// Do not use this. Use the cTypes function below. This is global just to avoid
// excessive calls when cTypes is being called multiple times during a parse.
var basicCTypes = words("int long char short double float unsigned signed " +
                        "void bool");

// Do not use this. Use the objCTypes function below. This is global just to avoid
// excessive calls when objCTypes is being called multiple times during a parse.
var basicObjCTypes = words("SEL instancetype id Class Protocol BOOL");

// Returns true if identifier is a "C" type.
// C type is defined as those that are reserved by the compiler (basicTypes),
// and those that end in _t (Reserved by POSIX for types)
// http://www.gnu.org/software/libc/manual/html_node/Reserved-Names.html
function cTypes(identifier) {
  return contains(basicCTypes, identifier) || /.+_t$/.test(identifier);
}

// Returns true if identifier is a "Objective C" type.
function objCTypes(identifier) {
  return cTypes(identifier) || contains(basicObjCTypes, identifier);
}

var cBlockKeywords = "case do else for if switch while struct enum union";
var cDefKeywords = "struct enum union";

function cppHook(stream, state) {
  if (!state.startOfLine) return false
  for (var ch, next = null; ch = stream.peek();) {
    if (ch == "\\" && stream.match(/^.$/)) {
      next = cppHook;
      break
    } else if (ch == "/" && stream.match(/^\/[\/\*]/, false)) {
      break
    }
    stream.next();
  }
  state.tokenize = next;
  return "meta"
}

function pointerHook(_stream, state) {
  if (state.prevToken == "type") return "type";
  return false;
}

// For C and C++ (and ObjC): identifiers starting with __
// or _ followed by a capital letter are reserved for the compiler.
function cIsReservedIdentifier(token) {
  if (!token || token.length < 2) return false;
  if (token[0] != '_') return false;
  return (token[1] == '_') || (token[1] !== token[1].toLowerCase());
}

function cpp14Literal(stream) {
  stream.eatWhile(/[\w\.']/);
  return "number";
}

function cpp11StringHook(stream, state) {
  stream.backUp(1);
  // Raw strings.
  if (stream.match(/^(?:R|u8R|uR|UR|LR)/)) {
    var match = stream.match(/^"([^\s\\()]{0,16})\(/);
    if (!match) {
      return false;
    }
    state.cpp11RawStringDelim = match[1];
    state.tokenize = tokenRawString;
    return tokenRawString(stream, state);
  }
  // Unicode strings/chars.
  if (stream.match(/^(?:u8|u|U|L)/)) {
    if (stream.match(/^["']/, /* eat */ false)) {
      return "string";
    }
    return false;
  }
  // Ignore this hook.
  stream.next();
  return false;
}

function cppLooksLikeConstructor(word) {
  var lastTwo = /(\w+)::~?(\w+)$/.exec(word);
  return lastTwo && lastTwo[1] == lastTwo[2];
}

// C#-style strings where "" escapes a quote.
function tokenAtString(stream, state) {
  var next;
  while ((next = stream.next()) != null) {
    if (next == '"' && !stream.eat('"')) {
      state.tokenize = null;
      break;
    }
  }
  return "string";
}

// C++11 raw string literal is <prefix>"<delim>( anything )<delim>", where
// <delim> can be a string up to 16 characters long.
function tokenRawString(stream, state) {
  // Escape characters that have special regex meanings.
  var delim = state.cpp11RawStringDelim.replace(/[^\w\s]/g, '\\$&');
  var match = stream.match(new RegExp(".*?\\)" + delim + '"'));
  if (match)
    state.tokenize = null;
  else
    stream.skipToEnd();
  return "string";
}

const c = clike({
  keywords: words(cKeywords),
  types: cTypes,
  blockKeywords: words(cBlockKeywords),
  defKeywords: words(cDefKeywords),
  typeFirstDefinitions: true,
  atoms: words("NULL true false"),
  isReservedIdentifier: cIsReservedIdentifier,
  hooks: {
    "#": cppHook,
    "*": pointerHook,
  }
});

const cpp = clike({
  keywords: words(cKeywords + " " + cppKeywords),
  types: cTypes,
  blockKeywords: words(cBlockKeywords + " class try catch"),
  defKeywords: words(cDefKeywords + " class namespace"),
  typeFirstDefinitions: true,
  atoms: words("true false NULL nullptr"),
  dontIndentStatements: /^template$/,
  isIdentifierChar: /[\w\$_~\xa1-\uffff]/,
  isReservedIdentifier: cIsReservedIdentifier,
  hooks: {
    "#": cppHook,
    "*": pointerHook,
    "u": cpp11StringHook,
    "U": cpp11StringHook,
    "L": cpp11StringHook,
    "R": cpp11StringHook,
    "0": cpp14Literal,
    "1": cpp14Literal,
    "2": cpp14Literal,
    "3": cpp14Literal,
    "4": cpp14Literal,
    "5": cpp14Literal,
    "6": cpp14Literal,
    "7": cpp14Literal,
    "8": cpp14Literal,
    "9": cpp14Literal,
    token: function(stream, state, style) {
      if (style == "variable" && stream.peek() == "(" &&
          (state.prevToken == ";" || state.prevToken == null ||
           state.prevToken == "}") &&
          cppLooksLikeConstructor(stream.current()))
        return "def";
    }
  },
  namespaceSeparator: "::"
});

const java = clike({
  keywords: words("abstract assert break case catch class const continue default " +
                  "do else enum extends final finally for goto if implements import " +
                  "instanceof interface native new package private protected public " +
                  "return static strictfp super switch synchronized this throw throws transient " +
                  "try volatile while @interface"),
  types: words("byte short int long float double boolean char void Boolean Byte Character Double Float " +
               "Integer Long Number Object Short String StringBuffer StringBuilder Void"),
  blockKeywords: words("catch class do else finally for if switch try while"),
  defKeywords: words("class interface enum @interface"),
  typeFirstDefinitions: true,
  atoms: words("true false null"),
  number: /^(?:0x[a-f\d_]+|0b[01_]+|(?:[\d_]+\.?\d*|\.\d+)(?:e[-+]?[\d_]+)?)(u|ll?|l|f)?/i,
  hooks: {
    "@": function(stream) {
      // Don't match the @interface keyword.
      if (stream.match('interface', false)) return false;

      stream.eatWhile(/[\w\$_]/);
      return "meta";
    }
  }
});

const csharp = clike({
  keywords: words("abstract as async await base break case catch checked class const continue" +
                  " default delegate do else enum event explicit extern finally fixed for" +
                  " foreach goto if implicit in interface internal is lock namespace new" +
                  " operator out override params private protected public readonly ref return sealed" +
                  " sizeof stackalloc static struct switch this throw try typeof unchecked" +
                  " unsafe using virtual void volatile while add alias ascending descending dynamic from get" +
                  " global group into join let orderby partial remove select set value var yield"),
  types: words("Action Boolean Byte Char DateTime DateTimeOffset Decimal Double Func" +
               " Guid Int16 Int32 Int64 Object SByte Single String Task TimeSpan UInt16 UInt32" +
               " UInt64 bool byte char decimal double short int long object"  +
               " sbyte float string ushort uint ulong"),
  blockKeywords: words("catch class do else finally for foreach if struct switch try while"),
  defKeywords: words("class interface namespace struct var"),
  typeFirstDefinitions: true,
  atoms: words("true false null"),
  hooks: {
    "@": function(stream, state) {
      if (stream.eat('"')) {
        state.tokenize = tokenAtString;
        return tokenAtString(stream, state);
      }
      stream.eatWhile(/[\w\$_]/);
      return "meta";
    }
  }
});

function tokenTripleString(stream, state) {
  var escaped = false;
  while (!stream.eol()) {
    if (!escaped && stream.match('"""')) {
      state.tokenize = null;
      break;
    }
    escaped = stream.next() == "\\" && !escaped;
  }
  return "string";
}

function tokenNestedComment(depth) {
  return function (stream, state) {
    var ch;
    while (ch = stream.next()) {
      if (ch == "*" && stream.eat("/")) {
        if (depth == 1) {
          state.tokenize = null;
          break
        } else {
          state.tokenize = tokenNestedComment(depth - 1);
          return state.tokenize(stream, state)
        }
      } else if (ch == "/" && stream.eat("*")) {
        state.tokenize = tokenNestedComment(depth + 1);
        return state.tokenize(stream, state)
      }
    }
    return "comment"
  }
}

const scala = clike({
  keywords: words(
    /* scala */
    "abstract case catch class def do else extends final finally for forSome if " +
      "implicit import lazy match new null object override package private protected return " +
      "sealed super this throw trait try type val var while with yield _ " +

    /* package scala */
    "assert assume require print println printf readLine readBoolean readByte readShort " +
      "readChar readInt readLong readFloat readDouble"
  ),
  types: words(
    "AnyVal App Application Array BufferedIterator BigDecimal BigInt Char Console Either " +
      "Enumeration Equiv Error Exception Fractional Function IndexedSeq Int Integral Iterable " +
      "Iterator List Map Numeric Nil NotNull Option Ordered Ordering PartialFunction PartialOrdering " +
      "Product Proxy Range Responder Seq Serializable Set Specializable Stream StringBuilder " +
      "StringContext Symbol Throwable Traversable TraversableOnce Tuple Unit Vector " +

    /* package java.lang */
    "Boolean Byte Character CharSequence Class ClassLoader Cloneable Comparable " +
      "Compiler Double Exception Float Integer Long Math Number Object Package Pair Process " +
      "Runtime Runnable SecurityManager Short StackTraceElement StrictMath String " +
      "StringBuffer System Thread ThreadGroup ThreadLocal Throwable Triple Void"
  ),
  multiLineStrings: true,
  blockKeywords: words("catch class enum do else finally for forSome if match switch try while"),
  defKeywords: words("class enum def object package trait type val var"),
  atoms: words("true false null"),
  indentStatements: false,
  indentSwitch: false,
  isOperatorChar: /[+\-*&%=<>!?|\/#:@]/,
  hooks: {
    "@": function(stream) {
      stream.eatWhile(/[\w\$_]/);
      return "meta";
    },
    '"': function(stream, state) {
      if (!stream.match('""')) return false;
      state.tokenize = tokenTripleString;
      return state.tokenize(stream, state);
    },
    "'": function(stream) {
      stream.eatWhile(/[\w\$_\xa1-\uffff]/);
      return "atom";
    },
    "=": function(stream, state) {
      var cx = state.context;
      if (cx.type == "}" && cx.align && stream.eat(">")) {
        state.context = new Context(cx.indented, cx.column, cx.type, cx.info, null, cx.prev);
        return "operator"
      } else {
        return false
      }
    },

    "/": function(stream, state) {
      if (!stream.eat("*")) return false
      state.tokenize = tokenNestedComment(1);
      return state.tokenize(stream, state)
    }
  },
  languageData: {
    closeBrackets: {brackets: ["(", "[", "{", "'", '"', '"""']}
  }
});

function tokenKotlinString(tripleString){
  return function (stream, state) {
    var escaped = false, next, end = false;
    while (!stream.eol()) {
      if (!tripleString && !escaped && stream.match('"') ) {end = true; break;}
      if (tripleString && stream.match('"""')) {end = true; break;}
      next = stream.next();
      if(!escaped && next == "$" && stream.match('{'))
        stream.skipTo("}");
      escaped = !escaped && next == "\\" && !tripleString;
    }
    if (end || !tripleString)
      state.tokenize = null;
    return "string";
  }
}

const kotlin = clike({
  keywords: words(
    /*keywords*/
    "package as typealias class interface this super val operator " +
      "var fun for is in This throw return annotation " +
      "break continue object if else while do try when !in !is as? " +

    /*soft keywords*/
    "file import where by get set abstract enum open inner override private public internal " +
      "protected catch finally out final vararg reified dynamic companion constructor init " +
      "sealed field property receiver param sparam lateinit data inline noinline tailrec " +
      "external annotation crossinline const operator infix suspend actual expect setparam"
  ),
  types: words(
    /* package java.lang */
    "Boolean Byte Character CharSequence Class ClassLoader Cloneable Comparable " +
      "Compiler Double Exception Float Integer Long Math Number Object Package Pair Process " +
      "Runtime Runnable SecurityManager Short StackTraceElement StrictMath String " +
      "StringBuffer System Thread ThreadGroup ThreadLocal Throwable Triple Void Annotation Any BooleanArray " +
      "ByteArray Char CharArray DeprecationLevel DoubleArray Enum FloatArray Function Int IntArray Lazy " +
      "LazyThreadSafetyMode LongArray Nothing ShortArray Unit"
  ),
  intendSwitch: false,
  indentStatements: false,
  multiLineStrings: true,
  number: /^(?:0x[a-f\d_]+|0b[01_]+|(?:[\d_]+(\.\d+)?|\.\d+)(?:e[-+]?[\d_]+)?)(u|ll?|l|f)?/i,
  blockKeywords: words("catch class do else finally for if where try while enum"),
  defKeywords: words("class val var object interface fun"),
  atoms: words("true false null this"),
  hooks: {
    "@": function(stream) {
      stream.eatWhile(/[\w\$_]/);
      return "meta";
    },
    '*': function(_stream, state) {
      return state.prevToken == '.' ? 'variable' : 'operator';
    },
    '"': function(stream, state) {
      state.tokenize = tokenKotlinString(stream.match('""'));
      return state.tokenize(stream, state);
    },
    "/": function(stream, state) {
      if (!stream.eat("*")) return false;
      state.tokenize = tokenNestedComment(1);
      return state.tokenize(stream, state)
    },
    indent: function(state, ctx, textAfter, indentUnit) {
      var firstChar = textAfter && textAfter.charAt(0);
      if ((state.prevToken == "}" || state.prevToken == ")") && textAfter == "")
        return state.indented;
      if ((state.prevToken == "operator" && textAfter != "}" && state.context.type != "}") ||
          state.prevToken == "variable" && firstChar == "." ||
          (state.prevToken == "}" || state.prevToken == ")") && firstChar == ".")
        return indentUnit * 2 + ctx.indented;
      if (ctx.align && ctx.type == "}")
        return ctx.indented + (state.context.type == (textAfter || "").charAt(0) ? 0 : indentUnit);
    }
  },
  languageData: {
    closeBrackets: {brackets: ["(", "[", "{", "'", '"', '"""']}
  }
});

const shader = clike({
  keywords: words("sampler1D sampler2D sampler3D samplerCube " +
                  "sampler1DShadow sampler2DShadow " +
                  "const attribute uniform varying " +
                  "break continue discard return " +
                  "for while do if else struct " +
                  "in out inout"),
  types: words("float int bool void " +
               "vec2 vec3 vec4 ivec2 ivec3 ivec4 bvec2 bvec3 bvec4 " +
               "mat2 mat3 mat4"),
  blockKeywords: words("for while do if else struct"),
  builtin: words("radians degrees sin cos tan asin acos atan " +
                 "pow exp log exp2 sqrt inversesqrt " +
                 "abs sign floor ceil fract mod min max clamp mix step smoothstep " +
                 "length distance dot cross normalize ftransform faceforward " +
                 "reflect refract matrixCompMult " +
                 "lessThan lessThanEqual greaterThan greaterThanEqual " +
                 "equal notEqual any all not " +
                 "texture1D texture1DProj texture1DLod texture1DProjLod " +
                 "texture2D texture2DProj texture2DLod texture2DProjLod " +
                 "texture3D texture3DProj texture3DLod texture3DProjLod " +
                 "textureCube textureCubeLod " +
                 "shadow1D shadow2D shadow1DProj shadow2DProj " +
                 "shadow1DLod shadow2DLod shadow1DProjLod shadow2DProjLod " +
                 "dFdx dFdy fwidth " +
                 "noise1 noise2 noise3 noise4"),
  atoms: words("true false " +
               "gl_FragColor gl_SecondaryColor gl_Normal gl_Vertex " +
               "gl_MultiTexCoord0 gl_MultiTexCoord1 gl_MultiTexCoord2 gl_MultiTexCoord3 " +
               "gl_MultiTexCoord4 gl_MultiTexCoord5 gl_MultiTexCoord6 gl_MultiTexCoord7 " +
               "gl_FogCoord gl_PointCoord " +
               "gl_Position gl_PointSize gl_ClipVertex " +
               "gl_FrontColor gl_BackColor gl_FrontSecondaryColor gl_BackSecondaryColor " +
               "gl_TexCoord gl_FogFragCoord " +
               "gl_FragCoord gl_FrontFacing " +
               "gl_FragData gl_FragDepth " +
               "gl_ModelViewMatrix gl_ProjectionMatrix gl_ModelViewProjectionMatrix " +
               "gl_TextureMatrix gl_NormalMatrix gl_ModelViewMatrixInverse " +
               "gl_ProjectionMatrixInverse gl_ModelViewProjectionMatrixInverse " +
               "gl_TextureMatrixTranspose gl_ModelViewMatrixInverseTranspose " +
               "gl_ProjectionMatrixInverseTranspose " +
               "gl_ModelViewProjectionMatrixInverseTranspose " +
               "gl_TextureMatrixInverseTranspose " +
               "gl_NormalScale gl_DepthRange gl_ClipPlane " +
               "gl_Point gl_FrontMaterial gl_BackMaterial gl_LightSource gl_LightModel " +
               "gl_FrontLightModelProduct gl_BackLightModelProduct " +
               "gl_TextureColor gl_EyePlaneS gl_EyePlaneT gl_EyePlaneR gl_EyePlaneQ " +
               "gl_FogParameters " +
               "gl_MaxLights gl_MaxClipPlanes gl_MaxTextureUnits gl_MaxTextureCoords " +
               "gl_MaxVertexAttribs gl_MaxVertexUniformComponents gl_MaxVaryingFloats " +
               "gl_MaxVertexTextureImageUnits gl_MaxTextureImageUnits " +
               "gl_MaxFragmentUniformComponents gl_MaxCombineTextureImageUnits " +
               "gl_MaxDrawBuffers"),
  indentSwitch: false,
  hooks: {"#": cppHook}
});

const nesC = clike({
  keywords: words(cKeywords + " as atomic async call command component components configuration event generic " +
                  "implementation includes interface module new norace nx_struct nx_union post provides " +
                  "signal task uses abstract extends"),
  types: cTypes,
  blockKeywords: words(cBlockKeywords),
  atoms: words("null true false"),
  hooks: {"#": cppHook}
});

const objectiveC = clike({
  keywords: words(cKeywords + " " + objCKeywords),
  types: objCTypes,
  builtin: words(objCBuiltins),
  blockKeywords: words(cBlockKeywords + " @synthesize @try @catch @finally @autoreleasepool @synchronized"),
  defKeywords: words(cDefKeywords + " @interface @implementation @protocol @class"),
  dontIndentStatements: /^@.*$/,
  typeFirstDefinitions: true,
  atoms: words("YES NO NULL Nil nil true false nullptr"),
  isReservedIdentifier: cIsReservedIdentifier,
  hooks: {
    "#": cppHook,
    "*": pointerHook,
  }
});

const objectiveCpp = clike({
  keywords: words(cKeywords + " " + objCKeywords + " " + cppKeywords),
  types: objCTypes,
  builtin: words(objCBuiltins),
  blockKeywords: words(cBlockKeywords + " @synthesize @try @catch @finally @autoreleasepool @synchronized class try catch"),
  defKeywords: words(cDefKeywords + " @interface @implementation @protocol @class class namespace"),
  dontIndentStatements: /^@.*$|^template$/,
  typeFirstDefinitions: true,
  atoms: words("YES NO NULL Nil nil true false nullptr"),
  isReservedIdentifier: cIsReservedIdentifier,
  hooks: {
    "#": cppHook,
    "*": pointerHook,
    "u": cpp11StringHook,
    "U": cpp11StringHook,
    "L": cpp11StringHook,
    "R": cpp11StringHook,
    "0": cpp14Literal,
    "1": cpp14Literal,
    "2": cpp14Literal,
    "3": cpp14Literal,
    "4": cpp14Literal,
    "5": cpp14Literal,
    "6": cpp14Literal,
    "7": cpp14Literal,
    "8": cpp14Literal,
    "9": cpp14Literal,
    token: function(stream, state, style) {
      if (style == "variable" && stream.peek() == "(" &&
          (state.prevToken == ";" || state.prevToken == null ||
           state.prevToken == "}") &&
          cppLooksLikeConstructor(stream.current()))
        return "def";
    }
  },
  namespaceSeparator: "::"
});

const squirrel = clike({
  keywords: words("base break clone continue const default delete enum extends function in class" +
                  " foreach local resume return this throw typeof yield constructor instanceof static"),
  types: cTypes,
  blockKeywords: words("case catch class else for foreach if switch try while"),
  defKeywords: words("function local class"),
  typeFirstDefinitions: true,
  atoms: words("true false null"),
  hooks: {"#": cppHook}
});

// Ceylon Strings need to deal with interpolation
var stringTokenizer = null;
function tokenCeylonString(type) {
  return function(stream, state) {
    var escaped = false, next, end = false;
    while (!stream.eol()) {
      if (!escaped && stream.match('"') &&
          (type == "single" || stream.match('""'))) {
        end = true;
        break;
      }
      if (!escaped && stream.match('``')) {
        stringTokenizer = tokenCeylonString(type);
        end = true;
        break;
      }
      next = stream.next();
      escaped = type == "single" && !escaped && next == "\\";
    }
    if (end)
      state.tokenize = null;
    return "string";
  }
}

const ceylon = clike({
  keywords: words("abstracts alias assembly assert assign break case catch class continue dynamic else" +
                  " exists extends finally for function given if import in interface is let module new" +
                  " nonempty object of out outer package return satisfies super switch then this throw" +
                  " try value void while"),
  types: function(word) {
    // In Ceylon all identifiers that start with an uppercase are types
    var first = word.charAt(0);
    return (first === first.toUpperCase() && first !== first.toLowerCase());
  },
  blockKeywords: words("case catch class dynamic else finally for function if interface module new object switch try while"),
  defKeywords: words("class dynamic function interface module object package value"),
  builtin: words("abstract actual aliased annotation by default deprecated doc final formal late license" +
                 " native optional sealed see serializable shared suppressWarnings tagged throws variable"),
  isPunctuationChar: /[\[\]{}\(\),;\:\.`]/,
  isOperatorChar: /[+\-*&%=<>!?|^~:\/]/,
  numberStart: /[\d#$]/,
  number: /^(?:#[\da-fA-F_]+|\$[01_]+|[\d_]+[kMGTPmunpf]?|[\d_]+\.[\d_]+(?:[eE][-+]?\d+|[kMGTPmunpf]|)|)/i,
  multiLineStrings: true,
  typeFirstDefinitions: true,
  atoms: words("true false null larger smaller equal empty finished"),
  indentSwitch: false,
  styleDefs: false,
  hooks: {
    "@": function(stream) {
      stream.eatWhile(/[\w\$_]/);
      return "meta";
    },
    '"': function(stream, state) {
      state.tokenize = tokenCeylonString(stream.match('""') ? "triple" : "single");
      return state.tokenize(stream, state);
    },
    '`': function(stream, state) {
      if (!stringTokenizer || !stream.match('`')) return false;
      state.tokenize = stringTokenizer;
      stringTokenizer = null;
      return state.tokenize(stream, state);
    },
    "'": function(stream) {
      stream.eatWhile(/[\w\$_\xa1-\uffff]/);
      return "atom";
    },
    token: function(_stream, state, style) {
      if ((style == "variable" || style == "type") &&
          state.prevToken == ".") {
        return "variableName.special";
      }
    }
  },
  languageData: {
    closeBrackets: {brackets: ["(", "[", "{", "'", '"', '"""']}
  }
});

function pushInterpolationStack(state) {
  (state.interpolationStack || (state.interpolationStack = [])).push(state.tokenize);
}

function popInterpolationStack(state) {
  return (state.interpolationStack || (state.interpolationStack = [])).pop();
}

function sizeInterpolationStack(state) {
  return state.interpolationStack ? state.interpolationStack.length : 0;
}

function tokenDartString(quote, stream, state, raw) {
  var tripleQuoted = false;
  if (stream.eat(quote)) {
    if (stream.eat(quote)) tripleQuoted = true;
    else return "string"; //empty string
  }
  function tokenStringHelper(stream, state) {
    var escaped = false;
    while (!stream.eol()) {
      if (!raw && !escaped && stream.peek() == "$") {
        pushInterpolationStack(state);
        state.tokenize = tokenInterpolation;
        return "string";
      }
      var next = stream.next();
      if (next == quote && !escaped && (!tripleQuoted || stream.match(quote + quote))) {
        state.tokenize = null;
        break;
      }
      escaped = !raw && !escaped && next == "\\";
    }
    return "string";
  }
  state.tokenize = tokenStringHelper;
  return tokenStringHelper(stream, state);
}

function tokenInterpolation(stream, state) {
  stream.eat("$");
  if (stream.eat("{")) {
    // let clike handle the content of ${...},
    // we take over again when "}" appears (see hooks).
    state.tokenize = null;
  } else {
    state.tokenize = tokenInterpolationIdentifier;
  }
  return null;
}

function tokenInterpolationIdentifier(stream, state) {
  stream.eatWhile(/[\w_]/);
  state.tokenize = popInterpolationStack(state);
  return "variable";
}

const dart = clike({
  keywords: words("this super static final const abstract class extends external factory " +
                  "implements mixin get native set typedef with enum throw rethrow " +
                  "assert break case continue default in return new deferred async await covariant " +
                  "try catch finally do else for if switch while import library export " +
                  "part of show hide is as extension on yield late required"),
  blockKeywords: words("try catch finally do else for if switch while"),
  builtin: words("void bool num int double dynamic var String Null Never"),
  atoms: words("true false null"),
  hooks: {
    "@": function(stream) {
      stream.eatWhile(/[\w\$_\.]/);
      return "meta";
    },

    // custom string handling to deal with triple-quoted strings and string interpolation
    "'": function(stream, state) {
      return tokenDartString("'", stream, state, false);
    },
    "\"": function(stream, state) {
      return tokenDartString("\"", stream, state, false);
    },
    "r": function(stream, state) {
      var peek = stream.peek();
      if (peek == "'" || peek == "\"") {
        return tokenDartString(stream.next(), stream, state, true);
      }
      return false;
    },

    "}": function(_stream, state) {
      // "}" is end of interpolation, if interpolation stack is non-empty
      if (sizeInterpolationStack(state) > 0) {
        state.tokenize = popInterpolationStack(state);
        return null;
      }
      return false;
    },

    "/": function(stream, state) {
      if (!stream.eat("*")) return false
      state.tokenize = tokenNestedComment(1);
      return state.tokenize(stream, state)
    },
    token: function(stream, _, style) {
      if (style == "variable") {
        // Assume uppercase symbols are classes
        var isUpper = RegExp('^[_$]*[A-Z][a-zA-Z0-9_$]*$','g');
        if (isUpper.test(stream.current())) {
          return 'type';
        }
      }
    }
  }
});

exports.c = c;
exports.ceylon = ceylon;
exports.clike = clike;
exports.cpp = cpp;
exports.csharp = csharp;
exports.dart = dart;
exports.java = java;
exports.kotlin = kotlin;
exports.nesC = nesC;
exports.objectiveC = objectiveC;
exports.objectiveCpp = objectiveCpp;
exports.scala = scala;
exports.shader = shader;
exports.squirrel = squirrel;
