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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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* Pig Latin Mode for CodeMirror 2

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* @author Prasanth Jayachandran

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* @link https://github.com/prasanthj/pig-codemirror-2

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* This implementation is adapted from PL/SQL mode in CodeMirror 2.

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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("pig", function(_config, parserConfig) {

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var keywords = parserConfig.keywords,

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builtins = parserConfig.builtins,

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types = parserConfig.types,

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multiLineStrings = parserConfig.multiLineStrings;

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var isOperatorChar = /[*+\-%<>=&?:\/!|]/;

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function chain(stream, state, f) {

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state.tokenize = f;

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return f(stream, state);

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}

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function tokenComment(stream, state) {

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var isEnd = false;

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var ch;

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while(ch = stream.next()) {

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if(ch == "/" && isEnd) {

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state.tokenize = tokenBase;

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break;

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}

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isEnd = (ch == "*");

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}

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return "comment";

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}

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function tokenString(quote) {

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return function(stream, state) {

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var escaped = false, next, end = false;

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

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if (next == quote && !escaped) {

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end = true; break;

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}

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escaped = !escaped && next == "\\";

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}

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if (end || !(escaped || multiLineStrings))

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state.tokenize = tokenBase;

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return "error";

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};

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}

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function tokenBase(stream, state) {

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var ch = stream.next();

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// is a start of string?

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

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return chain(stream, state, tokenString(ch));

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// is it one of the special chars

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else if(/[\[\]{},;\.]/.test(ch))

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return null;

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// is it a number?

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else 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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// multi line comment or operator

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else if (ch == "/") {

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if (stream.eat("*")) {

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return chain(stream, state, tokenComment);

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}

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else {

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stream.eatWhile(isOperatorChar);

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return "operator";

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}

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}

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// single line comment or operator

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else if (ch=="-") {

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if(stream.eat("-")){

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stream.skipToEnd();

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return "comment";

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}

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else {

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stream.eatWhile(isOperatorChar);

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return "operator";

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}

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}

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// is it an operator

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else if (isOperatorChar.test(ch)) {

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stream.eatWhile(isOperatorChar);

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return "operator";

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}

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else {

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// get the while word

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

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// is it one of the listed keywords?

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if (keywords && keywords.propertyIsEnumerable(stream.current().toUpperCase())) {

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//keywords can be used as variables like flatten(group), group.$0 etc..

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

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return "keyword";

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}

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// is it one of the builtin functions?

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if (builtins && builtins.propertyIsEnumerable(stream.current().toUpperCase()))

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return "variable-2";

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// is it one of the listed types?

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if (types && types.propertyIsEnumerable(stream.current().toUpperCase()))

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return "variable-3";

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// default is a 'variable'

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return "variable";

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}

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}

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// Interface

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return {

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startState: function() {

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return {

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tokenize: tokenBase,

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startOfLine: true

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};

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token: function(stream, state) {

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if(stream.eatSpace()) return null;

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

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return style;

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}

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};

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});

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(function() {

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function keywords(str) {

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var obj = {}, words = str.split(" ");

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for (var i = 0; i < words.length; ++i) obj[words[i]] = true;

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return obj;

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}

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// builtin funcs taken from trunk revision 1303237

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var pBuiltins = "ABS ACOS ARITY ASIN ATAN AVG BAGSIZE BINSTORAGE BLOOM BUILDBLOOM CBRT CEIL "

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+ "CONCAT COR COS COSH COUNT COUNT_STAR COV CONSTANTSIZE CUBEDIMENSIONS DIFF DISTINCT DOUBLEABS "

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+ "DOUBLEAVG DOUBLEBASE DOUBLEMAX DOUBLEMIN DOUBLEROUND DOUBLESUM EXP FLOOR FLOATABS FLOATAVG "

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+ "FLOATMAX FLOATMIN FLOATROUND FLOATSUM GENERICINVOKER INDEXOF INTABS INTAVG INTMAX INTMIN "

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+ "INTSUM INVOKEFORDOUBLE INVOKEFORFLOAT INVOKEFORINT INVOKEFORLONG INVOKEFORSTRING INVOKER "

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+ "ISEMPTY JSONLOADER JSONMETADATA JSONSTORAGE LAST_INDEX_OF LCFIRST LOG LOG10 LOWER LONGABS "

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+ "LONGAVG LONGMAX LONGMIN LONGSUM MAX MIN MAPSIZE MONITOREDUDF NONDETERMINISTIC OUTPUTSCHEMA "

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+ "PIGSTORAGE PIGSTREAMING RANDOM REGEX_EXTRACT REGEX_EXTRACT_ALL REPLACE ROUND SIN SINH SIZE "

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+ "SQRT STRSPLIT SUBSTRING SUM STRINGCONCAT STRINGMAX STRINGMIN STRINGSIZE TAN TANH TOBAG "

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+ "TOKENIZE TOMAP TOP TOTUPLE TRIM TEXTLOADER TUPLESIZE UCFIRST UPPER UTF8STORAGECONVERTER ";

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// taken from QueryLexer.g

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var pKeywords = "VOID IMPORT RETURNS DEFINE LOAD FILTER FOREACH ORDER CUBE DISTINCT COGROUP "

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+ "JOIN CROSS UNION SPLIT INTO IF OTHERWISE ALL AS BY USING INNER OUTER ONSCHEMA PARALLEL "

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+ "PARTITION GROUP AND OR NOT GENERATE FLATTEN ASC DESC IS STREAM THROUGH STORE MAPREDUCE "

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+ "SHIP CACHE INPUT OUTPUT STDERROR STDIN STDOUT LIMIT SAMPLE LEFT RIGHT FULL EQ GT LT GTE LTE "

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+ "NEQ MATCHES TRUE FALSE DUMP";

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// data types

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var pTypes = "BOOLEAN INT LONG FLOAT DOUBLE CHARARRAY BYTEARRAY BAG TUPLE MAP ";

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CodeMirror.defineMIME("text/x-pig", {

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name: "pig",

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builtins: keywords(pBuiltins),

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keywords: keywords(pKeywords),

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types: keywords(pTypes)

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});

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CodeMirror.registerHelper("hintWords", "pig", (pBuiltins + pTypes + pKeywords).split(" "));

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}());

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});

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