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// CodeMirror, copyright (c) by Marijn Haverbeke and others

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// Distributed under an MIT license: http://codemirror.net/LICENSE

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// LUA mode. Ported to CodeMirror 2 from Franciszek Wawrzak's

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// CodeMirror 1 mode.

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// highlights keywords, strings, comments (no leveling supported! ("[==[")), tokens, basic indenting

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(function(mod) {

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if (typeof exports == "object" && typeof module == "object") // CommonJS

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mod(require("../../lib/codemirror"));

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else if (typeof define == "function" && define.amd) // AMD

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define(["../../lib/codemirror"], mod);

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else // Plain browser env

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mod(CodeMirror);

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})(function(CodeMirror) {

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"use strict";

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CodeMirror.defineMode("lua", function(config, parserConfig) {

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var indentUnit = config.indentUnit;

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function prefixRE(words) {

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return new RegExp("^(?:" + words.join("|") + ")", "i");

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}

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function wordRE(words) {

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return new RegExp("^(?:" + words.join("|") + ")$", "i");

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}

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var specials = wordRE(parserConfig.specials || []);

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// long list of standard functions from lua manual

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var builtins = wordRE([

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"_G","_VERSION","assert","collectgarbage","dofile","error","getfenv","getmetatable","ipairs","load",

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"loadfile","loadstring","module","next","pairs","pcall","print","rawequal","rawget","rawset","require",

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"select","setfenv","setmetatable","tonumber","tostring","type","unpack","xpcall",

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"coroutine.create","coroutine.resume","coroutine.running","coroutine.status","coroutine.wrap","coroutine.yield",

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"debug.debug","debug.getfenv","debug.gethook","debug.getinfo","debug.getlocal","debug.getmetatable",

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"debug.getregistry","debug.getupvalue","debug.setfenv","debug.sethook","debug.setlocal","debug.setmetatable",

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"debug.setupvalue","debug.traceback",

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"close","flush","lines","read","seek","setvbuf","write",

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"io.close","io.flush","io.input","io.lines","io.open","io.output","io.popen","io.read","io.stderr","io.stdin",

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"io.stdout","io.tmpfile","io.type","io.write",

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"math.abs","math.acos","math.asin","math.atan","math.atan2","math.ceil","math.cos","math.cosh","math.deg",

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"math.exp","math.floor","math.fmod","math.frexp","math.huge","math.ldexp","math.log","math.log10","math.max",

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"math.min","math.modf","math.pi","math.pow","math.rad","math.random","math.randomseed","math.sin","math.sinh",

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"math.sqrt","math.tan","math.tanh",

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"os.clock","os.date","os.difftime","os.execute","os.exit","os.getenv","os.remove","os.rename","os.setlocale",

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"os.time","os.tmpname",

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"package.cpath","package.loaded","package.loaders","package.loadlib","package.path","package.preload",

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"package.seeall",

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"string.byte","string.char","string.dump","string.find","string.format","string.gmatch","string.gsub",

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"string.len","string.lower","string.match","string.rep","string.reverse","string.sub","string.upper",

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"table.concat","table.insert","table.maxn","table.remove","table.sort"

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]);

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var keywords = wordRE(["and","break","elseif","false","nil","not","or","return",

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"true","function", "end", "if", "then", "else", "do",

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"while", "repeat", "until", "for", "in", "local" ]);

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var indentTokens = wordRE(["function", "if","repeat","do", "\\(", "{"]);

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var dedentTokens = wordRE(["end", "until", "\\)", "}"]);

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var dedentPartial = prefixRE(["end", "until", "\\)", "}", "else", "elseif"]);

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function readBracket(stream) {

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var level = 0;

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while (stream.eat("=")) ++level;

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stream.eat("[");

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return level;

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}

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function normal(stream, state) {

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var ch = stream.next();

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if (ch == "-" && stream.eat("-")) {

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if (stream.eat("[") && stream.eat("["))

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return (state.cur = bracketed(readBracket(stream), "comment"))(stream, state);

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stream.skipToEnd();

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return "comment";

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}

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if (ch == "\"" || ch == "'")

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return (state.cur = string(ch))(stream, state);

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if (ch == "[" && /[\[=]/.test(stream.peek()))

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return (state.cur = bracketed(readBracket(stream), "string"))(stream, state);

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if (/\d/.test(ch)) {

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stream.eatWhile(/[\w.%]/);

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return "number";

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}

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if (/[\w_]/.test(ch)) {

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stream.eatWhile(/[\w\\\-_.]/);

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return "variable";

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}

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return null;

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}

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function bracketed(level, style) {

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return function(stream, state) {

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var curlev = null, ch;

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while ((ch = stream.next()) != null) {

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if (curlev == null) {if (ch == "]") curlev = 0;}

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else if (ch == "=") ++curlev;

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else if (ch == "]" && curlev == level) { state.cur = normal; break; }

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else curlev = null;

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}

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return style;

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};

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}

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function string(quote) {

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return function(stream, state) {

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var escaped = false, ch;

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while ((ch = stream.next()) != null) {

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if (ch == quote && !escaped) break;

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escaped = !escaped && ch == "\\";

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}

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if (!escaped) state.cur = normal;

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return "string";

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};

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}

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return {

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startState: function(basecol) {

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return {basecol: basecol || 0, indentDepth: 0, cur: normal};

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token: function(stream, state) {

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if (stream.eatSpace()) return null;

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var style = state.cur(stream, state);

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var word = stream.current();

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if (style == "variable") {

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if (keywords.test(word)) style = "keyword";

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else if (builtins.test(word)) style = "builtin";

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else if (specials.test(word)) style = "variable-2";

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}

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if ((style != "comment") && (style != "string")){

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if (indentTokens.test(word)) ++state.indentDepth;

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else if (dedentTokens.test(word)) --state.indentDepth;

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}

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return style;

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indent: function(state, textAfter) {

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var closing = dedentPartial.test(textAfter);

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return state.basecol + indentUnit * (state.indentDepth - (closing ? 1 : 0));

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lineComment: "--",

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blockCommentStart: "--[[",

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blockCommentEnd: "]]"

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};

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});

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

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});

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