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: / home / ujaneybc / selecthospital.in / user / plugins / codemirror / mode / elm /
Filename : elm.js
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// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

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

  CodeMirror.defineMode("elm", function() {

    function switchState(source, setState, f)
    {
      setState(f);
      return f(source, setState);
    }

    var lowerRE = /[a-z]/;
    var upperRE = /[A-Z]/;
    var innerRE = /[a-zA-Z0-9_]/;

    var digitRE = /[0-9]/;
    var hexRE = /[0-9A-Fa-f]/;
    var symbolRE = /[-&*+.\\/<>=?^|:]/;
    var specialRE = /[(),[\]{}]/;
    var spacesRE = /[ \v\f]/; // newlines are handled in tokenizer

    function normal()
    {
      return function(source, setState)
      {
        if (source.eatWhile(spacesRE))
        {
          return null;
        }

        var char = source.next();

        if (specialRE.test(char))
        {
          return (char === '{' && source.eat('-'))
            ? switchState(source, setState, chompMultiComment(1))
            : (char === '[' && source.match('glsl|'))
                ? switchState(source, setState, chompGlsl)
                : 'builtin';
        }

        if (char === '\'')
        {
          return switchState(source, setState, chompChar);
        }

        if (char === '"')
        {
          return source.eat('"')
            ? source.eat('"')
                ? switchState(source, setState, chompMultiString)
                : 'string'
            : switchState(source, setState, chompSingleString);
        }

        if (upperRE.test(char))
        {
          source.eatWhile(innerRE);
          return 'variable-2';
        }

        if (lowerRE.test(char))
        {
          var isDef = source.pos === 1;
          source.eatWhile(innerRE);
          return isDef ? "def" : "variable";
        }

        if (digitRE.test(char))
        {
          if (char === '0')
          {
            if (source.eat(/[xX]/))
            {
              source.eatWhile(hexRE); // should require at least 1
              return "number";
            }
          }
          else
          {
            source.eatWhile(digitRE);
          }
          if (source.eat('.'))
          {
            source.eatWhile(digitRE); // should require at least 1
          }
          if (source.eat(/[eE]/))
          {
            source.eat(/[-+]/);
            source.eatWhile(digitRE); // should require at least 1
          }
          return "number";
        }

        if (symbolRE.test(char))
        {
          if (char === '-' && source.eat('-'))
          {
            source.skipToEnd();
            return "comment";
          }
          source.eatWhile(symbolRE);
          return "keyword";
        }

        if (char === '_')
        {
          return "keyword";
        }

        return "error";
      }
    }

    function chompMultiComment(nest)
    {
      if (nest == 0)
      {
        return normal();
      }
      return function(source, setState)
      {
        while (!source.eol())
        {
          var char = source.next();
          if (char == '{' && source.eat('-'))
          {
            ++nest;
          }
          else if (char == '-' && source.eat('}'))
          {
            --nest;
            if (nest === 0)
            {
              setState(normal());
              return 'comment';
            }
          }
        }
        setState(chompMultiComment(nest));
        return 'comment';
      }
    }

    function chompMultiString(source, setState)
    {
      while (!source.eol())
      {
        var char = source.next();
        if (char === '"' && source.eat('"') && source.eat('"'))
        {
          setState(normal());
          return 'string';
        }
      }
      return 'string';
    }

    function chompSingleString(source, setState)
    {
      while (source.skipTo('\\"')) { source.next(); source.next(); }
      if (source.skipTo('"'))
      {
        source.next();
        setState(normal());
        return 'string';
      }
      source.skipToEnd();
      setState(normal());
      return 'error';
    }

    function chompChar(source, setState)
    {
      while (source.skipTo("\\'")) { source.next(); source.next(); }
      if (source.skipTo("'"))
      {
        source.next();
        setState(normal());
        return 'string';
      }
      source.skipToEnd();
      setState(normal());
      return 'error';
    }

    function chompGlsl(source, setState)
    {
      while (!source.eol())
      {
        var char = source.next();
        if (char === '|' && source.eat(']'))
        {
          setState(normal());
          return 'string';
        }
      }
      return 'string';
    }

    var wellKnownWords = {
      case: 1,
      of: 1,
      as: 1,
      if: 1,
      then: 1,
      else: 1,
      let: 1,
      in: 1,
      type: 1,
      alias: 1,
      module: 1,
      where: 1,
      import: 1,
      exposing: 1,
      port: 1
    };

    return {
      startState: function ()  { return { f: normal() }; },
      copyState:  function (s) { return { f: s.f }; },

      token: function(stream, state) {
        var type = state.f(stream, function(s) { state.f = s; });
        var word = stream.current();
        return (wellKnownWords.hasOwnProperty(word)) ? 'keyword' : type;
      }
    };

  });

  CodeMirror.defineMIME("text/x-elm", "elm");
});