third-party/codemirror-3.15/mode/lua/lua.js

   1 // LUA mode. Ported to CodeMirror 2 from Franciszek Wawrzak's
   2 // CodeMirror 1 mode.
   3 // highlights keywords, strings, comments (no leveling supported! ("[==[")), tokens, basic indenting
   4
   5 CodeMirror.defineMode("lua", function(config, parserConfig) {
   6   var indentUnit = config.indentUnit;
   7
   8   function prefixRE(words) {
   9     return new RegExp("^(?:" + words.join("|") + ")", "i");
  10   }
  11   function wordRE(words) {
  12     return new RegExp("^(?:" + words.join("|") + ")$", "i");
  13   }
  14   var specials = wordRE(parserConfig.specials || []);
  15
  16   // long list of standard functions from lua manual
  17   var builtins = wordRE([
  18     "_G","_VERSION","assert","collectgarbage","dofile","error","getfenv","getmetatable","ipairs","load",
  19     "loadfile","loadstring","module","next","pairs","pcall","print","rawequal","rawget","rawset","require",
  20     "select","setfenv","setmetatable","tonumber","tostring","type","unpack","xpcall",
  21
  22     "coroutine.create","coroutine.resume","coroutine.running","coroutine.status","coroutine.wrap","coroutine.yield",
  23
  24     "debug.debug","debug.getfenv","debug.gethook","debug.getinfo","debug.getlocal","debug.getmetatable",
  25     "debug.getregistry","debug.getupvalue","debug.setfenv","debug.sethook","debug.setlocal","debug.setmetatable",
  26     "debug.setupvalue","debug.traceback",
  27
  28     "close","flush","lines","read","seek","setvbuf","write",
  29
  30     "io.close","io.flush","io.input","io.lines","io.open","io.output","io.popen","io.read","io.stderr","io.stdin",
  31     "io.stdout","io.tmpfile","io.type","io.write",
  32
  33     "math.abs","math.acos","math.asin","math.atan","math.atan2","math.ceil","math.cos","math.cosh","math.deg",
  34     "math.exp","math.floor","math.fmod","math.frexp","math.huge","math.ldexp","math.log","math.log10","math.max",
  35     "math.min","math.modf","math.pi","math.pow","math.rad","math.random","math.randomseed","math.sin","math.sinh",
  36     "math.sqrt","math.tan","math.tanh",
  37
  38     "os.clock","os.date","os.difftime","os.execute","os.exit","os.getenv","os.remove","os.rename","os.setlocale",
  39     "os.time","os.tmpname",
  40
  41     "package.cpath","package.loaded","package.loaders","package.loadlib","package.path","package.preload",
  42     "package.seeall",
  43
  44     "string.byte","string.char","string.dump","string.find","string.format","string.gmatch","string.gsub",
  45     "string.len","string.lower","string.match","string.rep","string.reverse","string.sub","string.upper",
  46
  47     "table.concat","table.insert","table.maxn","table.remove","table.sort"
  48   ]);
  49   var keywords = wordRE(["and","break","elseif","false","nil","not","or","return",
  50                          "true","function", "end", "if", "then", "else", "do",
  51                          "while", "repeat", "until", "for", "in", "local" ]);
  52
  53   var indentTokens = wordRE(["function", "if","repeat","do", "\\(", "{"]);
  54   var dedentTokens = wordRE(["end", "until", "\\)", "}"]);
  55   var dedentPartial = prefixRE(["end", "until", "\\)", "}", "else", "elseif"]);
  56
  57   function readBracket(stream) {
  58     var level = 0;
  59     while (stream.eat("=")) ++level;
  60     stream.eat("[");
  61     return level;
  62   }
  63
  64   function normal(stream, state) {
  65     var ch = stream.next();
  66     if (ch == "-" && stream.eat("-")) {
  67       if (stream.eat("[") && stream.eat("["))
  68         return (state.cur = bracketed(readBracket(stream), "comment"))(stream, state);
  69       stream.skipToEnd();
  70       return "comment";
  71     }
  72     if (ch == "\"" || ch == "'")
  73       return (state.cur = string(ch))(stream, state);
  74     if (ch == "[" && /[\[=]/.test(stream.peek()))
  75       return (state.cur = bracketed(readBracket(stream), "string"))(stream, state);
  76     if (/\d/.test(ch)) {
  77       stream.eatWhile(/[\w.%]/);
  78       return "number";
  79     }
  80     if (/[\w_]/.test(ch)) {
  81       stream.eatWhile(/[\w\\\-_.]/);
  82       return "variable";
  83     }
  84     return null;
  85   }
  86
  87   function bracketed(level, style) {
  88     return function(stream, state) {
  89       var curlev = null, ch;
  90       while ((ch = stream.next()) != null) {
  91         if (curlev == null) {if (ch == "]") curlev = 0;}
  92         else if (ch == "=") ++curlev;
  93         else if (ch == "]" && curlev == level) { state.cur = normal; break; }
  94         else curlev = null;
  95       }
  96       return style;
  97     };
  98   }
  99
 100   function string(quote) {
 101     return function(stream, state) {
 102       var escaped = false, ch;
 103       while ((ch = stream.next()) != null) {
 104         if (ch == quote && !escaped) break;
 105         escaped = !escaped && ch == "\\";
 106       }
 107       if (!escaped) state.cur = normal;
 108       return "string";
 109     };
 110   }
 111
 112   return {
 113     startState: function(basecol) {
 114       return {basecol: basecol || 0, indentDepth: 0, cur: normal};
 115     },
 116
 117     token: function(stream, state) {
 118       if (stream.eatSpace()) return null;
 119       var style = state.cur(stream, state);
 120       var word = stream.current();
 121       if (style == "variable") {
 122         if (keywords.test(word)) style = "keyword";
 123         else if (builtins.test(word)) style = "builtin";
 124         else if (specials.test(word)) style = "variable-2";
 125       }
 126       if ((style != "comment") && (style != "string")){
 127         if (indentTokens.test(word)) ++state.indentDepth;
 128         else if (dedentTokens.test(word)) --state.indentDepth;
 129       }
 130       return style;
 131     },
 132
 133     indent: function(state, textAfter) {
 134       var closing = dedentPartial.test(textAfter);
 135       return state.basecol + indentUnit * (state.indentDepth - (closing ? 1 : 0));
 136     },
 137
 138     lineComment: "--",
 139     blockCommentStart: "--[[",
 140     blockCommentEnd: "]]"
 141   };
 142 });
 143
 144 CodeMirror.defineMIME("text/x-lua", "lua");