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// 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("../../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.registerHelper("wordChars", "r", /[\w.]/);

CodeMirror.defineMode("r", function(config) {
  function wordObj(words) {
    var res = {};
    for (var i = 0; i < words.length; ++i) res[words[i]] = true;
    return res;
  }
  var commonAtoms = ["NULL", "NA", "Inf", "NaN", "NA_integer_", "NA_real_", "NA_complex_", "NA_character_", "TRUE", "FALSE"];
  var commonBuiltins = ["list", "quote", "bquote", "eval", "return", "call", "parse", "deparse"];
  var commonKeywords = ["if", "else", "repeat", "while", "function", "for", "in", "next", "break"];
  var commonBlockKeywords = ["if", "else", "repeat", "while", "function", "for"];

CodeMirror.registerHelper("hintWords", "r", commonAtoms.concat(commonBuiltins, commonKeywords));

var atoms = wordObj(commonAtoms);
  var builtins = wordObj(commonBuiltins);
  var keywords = wordObj(commonKeywords);
  var blockkeywords = wordObj(commonBlockKeywords);
  var opChars = /[+\-*\/^<>=!&|~$:]/;
  var curPunc;

var ALIGN_YES = 1, ALIGN_NO = 2, BRACELESS = 4

return {
    startState: function() {
      return {tokenize: tokenBase,
              ctx: {type: "top",
                    indent: -config.indentUnit,
                    flags: ALIGN_NO},
              indent: 0,
              afterIdent: false};
    },

token: function(stream, state) {
      if (stream.sol()) {
        if ((state.ctx.flags & 3) == 0) state.ctx.flags |= ALIGN_NO
        if (state.ctx.flags & BRACELESS) pop(state)
        state.indent = stream.indentation();
      }
      if (stream.eatSpace()) return null;
      var style = state.tokenize(stream, state);
      if (style != "comment" && (state.ctx.flags & ALIGN_NO) == 0) setFlag(state, ALIGN_YES)

if ((curPunc == ";" || curPunc == "{" || curPunc == "}") && state.ctx.type == "block") pop(state);
      if (curPunc == "{") push(state, "}", stream);
      else if (curPunc == "(") {
        push(state, ")", stream);
        if (state.afterIdent) state.ctx.argList = true;
      }
      else if (curPunc == "[") push(state, "]", stream);
      else if (curPunc == "block") push(state, "block", stream);
      else if (curPunc == state.ctx.type) pop(state);
      else if (state.ctx.type == "block" && style != "comment") setFlag(state, BRACELESS)
      state.afterIdent = style == "variable" || style == "keyword";
      return style;
    },

indent: function(state, textAfter) {
      if (state.tokenize != tokenBase) return 0;
      var firstChar = textAfter && textAfter.charAt(0), ctx = state.ctx,
          closing = firstChar == ctx.type;
      if (ctx.flags & BRACELESS) ctx = ctx.prev
      if (ctx.type == "block") return ctx.indent + (firstChar == "{" ? 0 : config.indentUnit);
      else if (ctx.flags & ALIGN_YES) return ctx.column + (closing ? 0 : 1);
      else return ctx.indent + (closing ? 0 : config.indentUnit);
    },

lineComment: "#"
  };
});

CodeMirror.defineMIME("text/x-rsrc", "r");

});