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   1  // CodeMirror, copyright (c) by Marijn Haverbeke and others
   2  // Distributed under an MIT license: https://codemirror.net/5/LICENSE
   3  
   4  // Brainfuck mode created by Michael Kaminsky https://github.com/mkaminsky11
   5  
   6  (function(mod) {
   7    if (typeof exports == "object" && typeof module == "object")
   8      mod(require("../../lib/codemirror"))
   9    else if (typeof define == "function" && define.amd)
  10      define(["../../lib/codemirror"], mod)
  11    else
  12      mod(CodeMirror)
  13  })(function(CodeMirror) {
  14    "use strict"
  15    var reserve = "><+-.,[]".split("");
  16    /*
  17    comments can be either:
  18    placed behind lines
  19  
  20          +++    this is a comment
  21  
  22    where reserved characters cannot be used
  23    or in a loop
  24    [
  25      this is ok to use [ ] and stuff
  26    ]
  27    or preceded by #
  28    */
  29    CodeMirror.defineMode("brainfuck", function() {
  30      return {
  31        startState: function() {
  32          return {
  33            commentLine: false,
  34            left: 0,
  35            right: 0,
  36            commentLoop: false
  37          }
  38        },
  39        token: function(stream, state) {
  40          if (stream.eatSpace()) return null
  41          if(stream.sol()){
  42            state.commentLine = false;
  43          }
  44          var ch = stream.next().toString();
  45          if(reserve.indexOf(ch) !== -1){
  46            if(state.commentLine === true){
  47              if(stream.eol()){
  48                state.commentLine = false;
  49              }
  50              return "comment";
  51            }
  52            if(ch === "]" || ch === "["){
  53              if(ch === "["){
  54                state.left++;
  55              }
  56              else{
  57                state.right++;
  58              }
  59              return "bracket";
  60            }
  61            else if(ch === "+" || ch === "-"){
  62              return "keyword";
  63            }
  64            else if(ch === "<" || ch === ">"){
  65              return "atom";
  66            }
  67            else if(ch === "." || ch === ","){
  68              return "def";
  69            }
  70          }
  71          else{
  72            state.commentLine = true;
  73            if(stream.eol()){
  74              state.commentLine = false;
  75            }
  76            return "comment";
  77          }
  78          if(stream.eol()){
  79            state.commentLine = false;
  80          }
  81        }
  82      };
  83    });
  84  CodeMirror.defineMIME("text/x-brainfuck","brainfuck")
  85  });