// 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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// Mathematica mode copyright (c) 2015 by Calin Barbat

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// Based on code by Patrick Scheibe (halirutan)

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// See: https://github.com/halirutan/Mathematica-Source-Highlighting/tree/master/src/lang-mma.js

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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('mathematica', function(_config, _parserConfig) {

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// used pattern building blocks

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var Identifier = '[a-zA-Z\\$][a-zA-Z0-9\\$]*';

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var pBase = "(?:\\d+)";

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var pFloat = "(?:\\.\\d+|\\d+\\.\\d*|\\d+)";

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var pFloatBase = "(?:\\.\\w+|\\w+\\.\\w*|\\w+)";

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var pPrecision = "(?:`(?:`?"+pFloat+")?)";

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// regular expressions

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var reBaseForm = new RegExp('(?:'+pBase+'(?:\\^\\^'+pFloatBase+pPrecision+'?(?:\\*\\^[+-]?\\d+)?))');

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var reFloatForm = new RegExp('(?:' + pFloat + pPrecision + '?(?:\\*\\^[+-]?\\d+)?)');

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var reIdInContext = new RegExp('(?:`?)(?:' + Identifier + ')(?:`(?:' + Identifier + '))*(?:`?)');

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function tokenBase(stream, state) {

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var ch;

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// get next character

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ch = stream.next();

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// string

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if (ch === '"') {

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state.tokenize = tokenString;

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return state.tokenize(stream, state);

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}

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// comment

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if (ch === '(') {

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

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state.commentLevel++;

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state.tokenize = tokenComment;

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return state.tokenize(stream, state);

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}

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}

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// go back one character

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stream.backUp(1);

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// look for numbers

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// Numbers in a baseform

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if (stream.match(reBaseForm, true, false)) {

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return 'number';

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}

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// Mathematica numbers. Floats (1.2, .2, 1.) can have optionally a precision (`float) or an accuracy definition

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// (``float). Note: while 1.2` is possible 1.2`` is not. At the end an exponent (float*^+12) can follow.

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if (stream.match(reFloatForm, true, false)) {

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return 'number';

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}

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/* In[23] and Out[34] */

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if (stream.match(/(?:In|Out)\[[0-9]*\]/, true, false)) {

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return 'atom';

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}

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// usage

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if (stream.match(/([a-zA-Z\$]+(?:`?[a-zA-Z0-9\$])*::usage)/, true, false)) {

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return 'meta';

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}

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// message

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if (stream.match(/([a-zA-Z\$]+(?:`?[a-zA-Z0-9\$])*::[a-zA-Z\$][a-zA-Z0-9\$]*):?/, true, false)) {

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return 'string-2';

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}

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// this makes a look-ahead match for something like variable:{_Integer}

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// the match is then forwarded to the mma-patterns tokenizer.

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if (stream.match(/([a-zA-Z\$][a-zA-Z0-9\$]*\s*:)(?:(?:[a-zA-Z\$][a-zA-Z0-9\$]*)|(?:[^:=>~@\^\&\*\)\[\]'\?,\|])).*/, true, false)) {

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return 'variable-2';

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}

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// catch variables which are used together with Blank (_), BlankSequence (__) or BlankNullSequence (___)

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// Cannot start with a number, but can have numbers at any other position. Examples

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// blub__Integer, a1_, b34_Integer32

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if (stream.match(/[a-zA-Z\$][a-zA-Z0-9\$]*_+[a-zA-Z\$][a-zA-Z0-9\$]*/, true, false)) {

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return 'variable-2';

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}

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if (stream.match(/[a-zA-Z\$][a-zA-Z0-9\$]*_+/, true, false)) {

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return 'variable-2';

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}

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if (stream.match(/_+[a-zA-Z\$][a-zA-Z0-9\$]*/, true, false)) {

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return 'variable-2';

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}

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// Named characters in Mathematica, like \[Gamma].

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if (stream.match(/\\\[[a-zA-Z\$][a-zA-Z0-9\$]*\]/, true, false)) {

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return 'variable-3';

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}

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// Match all braces separately

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if (stream.match(/(?:\[|\]|{|}|\(|\))/, true, false)) {

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return 'bracket';

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}

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// Catch Slots (#, ##, #3, ##9 and the V10 named slots #name). I have never seen someone using more than one digit after #, so we match

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// only one.

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if (stream.match(/(?:#[a-zA-Z\$][a-zA-Z0-9\$]*|#+[0-9]?)/, true, false)) {

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return 'variable-2';

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}

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// Literals like variables, keywords, functions

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if (stream.match(reIdInContext, true, false)) {

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return 'keyword';

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}

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// operators. Note that operators like @@ or /; are matched separately for each symbol.

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if (stream.match(/(?:\\|\+|\-|\*|\/|,|;|\.|:|@|~|=|>|<|&|\||_|`|'|\^|\?|!|%)/, true, false)) {

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return 'operator';

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}

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// everything else is an error

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stream.next(); // advance the stream.

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return 'error';

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}

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function tokenString(stream, state) {

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var next, end = false, escaped = false;

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

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if (next === '"' && !escaped) {

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end = true;

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break;

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}

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escaped = !escaped && next === '\\';

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}

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if (end && !escaped) {

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state.tokenize = tokenBase;

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}

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return 'string';

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};

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function tokenComment(stream, state) {

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var prev, next;

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while(state.commentLevel > 0 && (next = stream.next()) != null) {

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if (prev === '(' && next === '*') state.commentLevel++;

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if (prev === '*' && next === ')') state.commentLevel--;

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prev = next;

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}

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if (state.commentLevel <= 0) {

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state.tokenize = tokenBase;

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}

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return 'comment';

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}

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return {

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startState: function() {return {tokenize: tokenBase, commentLevel: 0};},

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token: function(stream, state) {

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if (stream.eatSpace()) return null;

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return state.tokenize(stream, state);

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},

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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-mathematica', {

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name: 'mathematica'

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});

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});

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