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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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(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("crystal", function(config) {

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function wordRegExp(words, end) {

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return new RegExp((end ? "" : "^") + "(?:" + words.join("|") + ")" + (end ? "$" : "\\b"));

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}

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function chain(tokenize, stream, state) {

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state.tokenize.push(tokenize);

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return tokenize(stream, state);

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}

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var operators = /^(?:[-+/%|&^]|\*\*?|[<>]{2})/;

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var conditionalOperators = /^(?:[=!]~|===|<=>|[<>=!]=?|[|&]{2}|~)/;

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var indexingOperators = /^(?:\[\][?=]?)/;

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var anotherOperators = /^(?:\.(?:\.{2})?|->|[?:])/;

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var idents = /^[a-z_\u009F-\uFFFF][a-zA-Z0-9_\u009F-\uFFFF]*/;

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var types = /^[A-Z_\u009F-\uFFFF][a-zA-Z0-9_\u009F-\uFFFF]*/;

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var keywords = wordRegExp([

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"abstract", "alias", "as", "asm", "begin", "break", "case", "class", "def", "do",

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"else", "elsif", "end", "ensure", "enum", "extend", "for", "fun", "if", "ifdef",

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"include", "instance_sizeof", "lib", "macro", "module", "next", "of", "out", "pointerof",

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"private", "protected", "rescue", "return", "require", "sizeof", "struct",

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"super", "then", "type", "typeof", "union", "unless", "until", "when", "while", "with",

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"yield", "__DIR__", "__FILE__", "__LINE__"

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]);

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var atomWords = wordRegExp(["true", "false", "nil", "self"]);

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var indentKeywordsArray = [

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"def", "fun", "macro",

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"class", "module", "struct", "lib", "enum", "union",

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"if", "unless", "case", "while", "until", "begin", "then",

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"do",

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"for", "ifdef"

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];

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var indentKeywords = wordRegExp(indentKeywordsArray);

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var dedentKeywordsArray = [

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"end",

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"else", "elsif",

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"rescue", "ensure"

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];

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var dedentKeywords = wordRegExp(dedentKeywordsArray);

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var dedentPunctualsArray = ["\\)", "\\}", "\\]"];

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var dedentPunctuals = new RegExp("^(?:" + dedentPunctualsArray.join("|") + ")$");

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var nextTokenizer = {

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"def": tokenFollowIdent, "fun": tokenFollowIdent, "macro": tokenMacroDef,

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"class": tokenFollowType, "module": tokenFollowType, "struct": tokenFollowType,

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"lib": tokenFollowType, "enum": tokenFollowType, "union": tokenFollowType

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};

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var matching = {"[": "]", "{": "}", "(": ")", "<": ">"};

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function tokenBase(stream, state) {

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if (stream.eatSpace()) {

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return null;

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}

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// Macros

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if (state.lastToken != "\\" && stream.match("{%", false)) {

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return chain(tokenMacro("%", "%"), stream, state);

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}

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if (state.lastToken != "\\" && stream.match("{{", false)) {

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return chain(tokenMacro("{", "}"), stream, state);

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}

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// Comments

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if (stream.peek() == "#") {

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stream.skipToEnd();

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return "comment";

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}

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// Variables and keywords

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var matched;

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if (stream.match(idents)) {

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stream.eat(/[?!]/);

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matched = stream.current();

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

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return "atom";

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} else if (state.lastToken == ".") {

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return "property";

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} else if (keywords.test(matched)) {

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if (state.lastToken != "abstract" && indentKeywords.test(matched)) {

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if (!(matched == "fun" && state.blocks.indexOf("lib") >= 0)) {

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state.blocks.push(matched);

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state.currentIndent += 1;

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}

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} else if (dedentKeywords.test(matched)) {

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state.blocks.pop();

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state.currentIndent -= 1;

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}

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if (nextTokenizer.hasOwnProperty(matched)) {

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state.tokenize.push(nextTokenizer[matched]);

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}

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return "keyword";

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} else if (atomWords.test(matched)) {

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return "atom";

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}

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return "variable";

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}

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// Class variables and instance variables

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// or attributes

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

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if (stream.peek() == "[") {

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return chain(tokenNest("[", "]", "meta"), stream, state);

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}

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stream.eat("@");

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stream.match(idents) || stream.match(types);

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return "variable-2";

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}

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// Global variables

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

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stream.eat(/[0-9]+|\?/) || stream.match(idents) || stream.match(types);

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return "variable-3";

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}

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// Constants and types

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if (stream.match(types)) {

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return "tag";

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}

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// Symbols or ':' operator

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

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

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return chain(tokenQuote("\"", "atom", false), stream, state);

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} else if (stream.match(idents) || stream.match(types) ||

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stream.match(operators) || stream.match(conditionalOperators) || stream.match(indexingOperators)) {

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return "atom";

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}

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stream.eat(":");

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return "operator";

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}

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// Strings

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

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return chain(tokenQuote("\"", "string", true), stream, state);

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}

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// Strings or regexps or macro variables or '%' operator

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if (stream.peek() == "%") {

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var style = "string";

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var embed = true;

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var delim;

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if (stream.match("%r")) {

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// Regexps

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style = "string-2";

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delim = stream.next();

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} else if (stream.match("%w")) {

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embed = false;

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delim = stream.next();

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} else {

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if(delim = stream.match(/^%([^\w\s=])/)) {

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delim = delim[1];

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} else if (stream.match(/^%[a-zA-Z0-9_\u009F-\uFFFF]*/)) {

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// Macro variables

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return "meta";

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} else {

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// '%' operator

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return "operator";

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}

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}

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if (matching.hasOwnProperty(delim)) {

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delim = matching[delim];

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}

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return chain(tokenQuote(delim, style, embed), stream, state);

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}

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// Characters

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

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stream.match(/^(?:[^']|\\(?:[befnrtv0'"]|[0-7]{3}|u(?:[0-9a-fA-F]{4}|\{[0-9a-fA-F]{1,6}\})))/);

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stream.eat("'");

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return "atom";

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}

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// Numbers

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if (stream.eat("0")) {

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

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stream.match(/^[0-9a-fA-F]+/);

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} else if (stream.eat("o")) {

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stream.match(/^[0-7]+/);

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} else if (stream.eat("b")) {

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stream.match(/^[01]+/);

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}

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return "number";

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}

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if (stream.eat(/\d/)) {

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stream.match(/^\d*(?:\.\d+)?(?:[eE][+-]?\d+)?/);

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return "number";

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}

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// Operators

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if (stream.match(operators)) {

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stream.eat("="); // Operators can follow assign symbol.

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return "operator";

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}

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if (stream.match(conditionalOperators) || stream.match(anotherOperators)) {

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return "operator";

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}

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// Parens and braces

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if (matched = stream.match(/[({[]/, false)) {

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matched = matched[0];

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return chain(tokenNest(matched, matching[matched], null), stream, state);

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}

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// Escapes

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

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stream.next();

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return "meta";

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}

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stream.next();

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return null;

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}

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function tokenNest(begin, end, style, started) {

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return function (stream, state) {

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if (!started && stream.match(begin)) {

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state.tokenize[state.tokenize.length - 1] = tokenNest(begin, end, style, true);

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state.currentIndent += 1;

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return style;

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}

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var nextStyle = tokenBase(stream, state);

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if (stream.current() === end) {

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state.tokenize.pop();

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state.currentIndent -= 1;

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nextStyle = style;

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}

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return nextStyle;

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};

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}

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function tokenMacro(begin, end, started) {

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return function (stream, state) {

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if (!started && stream.match("{" + begin)) {

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state.currentIndent += 1;

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state.tokenize[state.tokenize.length - 1] = tokenMacro(begin, end, true);

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return "meta";

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}

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if (stream.match(end + "}")) {

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state.currentIndent -= 1;

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state.tokenize.pop();

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return "meta";

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}

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return tokenBase(stream, state);

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};

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}

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function tokenMacroDef(stream, state) {

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if (stream.eatSpace()) {

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return null;

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}

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var matched;

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if (matched = stream.match(idents)) {

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if (matched == "def") {

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return "keyword";

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}

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stream.eat(/[?!]/);

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}

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state.tokenize.pop();

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return "def";

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}

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function tokenFollowIdent(stream, state) {

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if (stream.eatSpace()) {

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return null;

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}

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if (stream.match(idents)) {

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stream.eat(/[!?]/);

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} else {

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stream.match(operators) || stream.match(conditionalOperators) || stream.match(indexingOperators);

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}

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state.tokenize.pop();

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return "def";

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}

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function tokenFollowType(stream, state) {

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if (stream.eatSpace()) {

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return null;

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}

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stream.match(types);

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state.tokenize.pop();

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return "def";

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}

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function tokenQuote(end, style, embed) {

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return function (stream, state) {

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var escaped = false;

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while (stream.peek()) {

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if (!escaped) {

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if (stream.match("{%", false)) {

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state.tokenize.push(tokenMacro("%", "%"));

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return style;

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}

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if (stream.match("{{", false)) {

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state.tokenize.push(tokenMacro("{", "}"));

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return style;

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}

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if (embed && stream.match("#{", false)) {

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state.tokenize.push(tokenNest("#{", "}", "meta"));

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return style;

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}

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var ch = stream.next();

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if (ch == end) {

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state.tokenize.pop();

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return style;

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}

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escaped = ch == "\\";

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} else {

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stream.next();

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escaped = false;

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}

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}

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return style;

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};

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}

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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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currentIndent: 0,

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lastToken: null,

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blocks: []

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};

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token: function (stream, state) {

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var style = state.tokenize[state.tokenize.length - 1](stream, state);

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var token = stream.current();

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

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state.lastToken = token;

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}

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return style;

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indent: function (state, textAfter) {

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textAfter = textAfter.replace(/^\s*(?:\{%)?\s*|\s*(?:%\})?\s*$/g, "");

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if (dedentKeywords.test(textAfter) || dedentPunctuals.test(textAfter)) {

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return config.indentUnit * (state.currentIndent - 1);

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}

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return config.indentUnit * state.currentIndent;

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fold: "indent",

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electricInput: wordRegExp(dedentPunctualsArray.concat(dedentKeywordsArray), true),

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lineComment: '#'

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};

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});

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

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});

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