// 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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/**

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* Link to the project's GitHub page:

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* https://github.com/pickhardt/coffeescript-codemirror-mode

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*/

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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("coffeescript", function(conf, parserConf) {

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var ERRORCLASS = "error";

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function wordRegexp(words) {

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return new RegExp("^((" + words.join(")|(") + "))\\b");

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}

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var operators = /^(?:->|=>|\+[+=]?|-[\-=]?|\*[\*=]?|\/[\/=]?|[=!]=|<[><]?=?|>>?=?|%=?|&=?|\|=?|\^=?|\~|!|\?|(or|and|\|\||&&|\?)=)/;

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var delimiters = /^(?:[()\[\]{},:`=;]|\.\.?\.?)/;

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var identifiers = /^[_A-Za-z$][_A-Za-z$0-9]*/;

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var atProp = /^@[_A-Za-z$][_A-Za-z$0-9]*/;

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var wordOperators = wordRegexp(["and", "or", "not",

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"is", "isnt", "in",

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"instanceof", "typeof"]);

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var indentKeywords = ["for", "while", "loop", "if", "unless", "else",

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"switch", "try", "catch", "finally", "class"];

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var commonKeywords = ["break", "by", "continue", "debugger", "delete",

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"do", "in", "of", "new", "return", "then",

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"this", "@", "throw", "when", "until", "extends"];

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var keywords = wordRegexp(indentKeywords.concat(commonKeywords));

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indentKeywords = wordRegexp(indentKeywords);

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var stringPrefixes = /^('{3}|\"{3}|['\"])/;

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var regexPrefixes = /^(\/{3}|\/)/;

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var commonConstants = ["Infinity", "NaN", "undefined", "null", "true", "false", "on", "off", "yes", "no"];

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var constants = wordRegexp(commonConstants);

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// Tokenizers

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function tokenBase(stream, state) {

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// Handle scope changes

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if (stream.sol()) {

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if (state.scope.align === null) state.scope.align = false;

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var scopeOffset = state.scope.offset;

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if (stream.eatSpace()) {

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var lineOffset = stream.indentation();

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if (lineOffset > scopeOffset && state.scope.type == "coffee") {

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return "indent";

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} else if (lineOffset < scopeOffset) {

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return "dedent";

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}

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return null;

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} else {

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if (scopeOffset > 0) {

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dedent(stream, state);

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}

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}

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}

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if (stream.eatSpace()) {

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return null;

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}

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var ch = stream.peek();

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// Handle docco title comment (single line)

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if (stream.match("####")) {

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stream.skipToEnd();

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return "comment";

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}

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// Handle multi line comments

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if (stream.match("###")) {

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state.tokenize = longComment;

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return state.tokenize(stream, state);

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}

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// Single line comment

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if (ch === "#") {

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stream.skipToEnd();

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return "comment";

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}

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// Handle number literals

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if (stream.match(/^-?[0-9\.]/, false)) {

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var floatLiteral = false;

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// Floats

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if (stream.match(/^-?\d*\.\d+(e[\+\-]?\d+)?/i)) {

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floatLiteral = true;

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}

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if (stream.match(/^-?\d+\.\d*/)) {

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floatLiteral = true;

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}

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if (stream.match(/^-?\.\d+/)) {

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floatLiteral = true;

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}

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if (floatLiteral) {

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// prevent from getting extra . on 1..

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

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stream.backUp(1);

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}

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return "number";

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}

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// Integers

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var intLiteral = false;

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// Hex

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if (stream.match(/^-?0x[0-9a-f]+/i)) {

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intLiteral = true;

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}

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// Decimal

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if (stream.match(/^-?[1-9]\d*(e[\+\-]?\d+)?/)) {

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intLiteral = true;

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}

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// Zero by itself with no other piece of number.

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if (stream.match(/^-?0(?![\dx])/i)) {

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intLiteral = true;

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}

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if (intLiteral) {

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return "number";

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}

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}

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// Handle strings

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if (stream.match(stringPrefixes)) {

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state.tokenize = tokenFactory(stream.current(), false, "string");

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return state.tokenize(stream, state);

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}

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// Handle regex literals

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if (stream.match(regexPrefixes)) {

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if (stream.current() != "/" || stream.match(/^.*\//, false)) { // prevent highlight of division

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state.tokenize = tokenFactory(stream.current(), true, "string-2");

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return state.tokenize(stream, state);

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} else {

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stream.backUp(1);

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}

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}

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// Handle operators and delimiters

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if (stream.match(operators) || stream.match(wordOperators)) {

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return "operator";

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}

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if (stream.match(delimiters)) {

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return "punctuation";

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}

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if (stream.match(constants)) {

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return "atom";

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}

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if (stream.match(atProp) || state.prop && stream.match(identifiers)) {

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return "property";

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}

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if (stream.match(keywords)) {

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return "keyword";

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}

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if (stream.match(identifiers)) {

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return "variable";

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}

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// Handle non-detected items

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stream.next();

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return ERRORCLASS;

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}

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function tokenFactory(delimiter, singleline, outclass) {

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return function(stream, state) {

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while (!stream.eol()) {

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stream.eatWhile(/[^'"\/\\]/);

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

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stream.next();

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if (singleline && stream.eol()) {

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return outclass;

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}

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} else if (stream.match(delimiter)) {

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state.tokenize = tokenBase;

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return outclass;

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} else {

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stream.eat(/['"\/]/);

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}

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}

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if (singleline) {

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if (parserConf.singleLineStringErrors) {

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outclass = ERRORCLASS;

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} else {

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state.tokenize = tokenBase;

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}

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}

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return outclass;

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};

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}

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function longComment(stream, state) {

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while (!stream.eol()) {

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stream.eatWhile(/[^#]/);

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if (stream.match("###")) {

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state.tokenize = tokenBase;

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break;

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}

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stream.eatWhile("#");

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}

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return "comment";

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}

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function indent(stream, state, type) {

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type = type || "coffee";

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var offset = 0, align = false, alignOffset = null;

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for (var scope = state.scope; scope; scope = scope.prev) {

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if (scope.type === "coffee" || scope.type == "}") {

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offset = scope.offset + conf.indentUnit;

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break;

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}

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}

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if (type !== "coffee") {

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align = null;

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alignOffset = stream.column() + stream.current().length;

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} else if (state.scope.align) {

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state.scope.align = false;

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}

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state.scope = {

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offset: offset,

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type: type,

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prev: state.scope,

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align: align,

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alignOffset: alignOffset

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};

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}

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function dedent(stream, state) {

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if (!state.scope.prev) return;

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if (state.scope.type === "coffee") {

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var _indent = stream.indentation();

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var matched = false;

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for (var scope = state.scope; scope; scope = scope.prev) {

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if (_indent === scope.offset) {

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matched = true;

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break;

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}

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}

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if (!matched) {

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return true;

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}

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while (state.scope.prev && state.scope.offset !== _indent) {

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state.scope = state.scope.prev;

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}

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return false;

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} else {

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state.scope = state.scope.prev;

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return false;

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}

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}

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function tokenLexer(stream, state) {

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

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var current = stream.current();

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// Handle scope changes.

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if (current === "return") {

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state.dedent = true;

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}

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if (((current === "->" || current === "=>") && stream.eol())

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|| style === "indent") {

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indent(stream, state);

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}

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var delimiter_index = "[({".indexOf(current);

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if (delimiter_index !== -1) {

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indent(stream, state, "])}".slice(delimiter_index, delimiter_index+1));

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}

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if (indentKeywords.exec(current)){

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indent(stream, state);

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}

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if (current == "then"){

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dedent(stream, state);

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}

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if (style === "dedent") {

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if (dedent(stream, state)) {

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return ERRORCLASS;

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}

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}

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delimiter_index = "])}".indexOf(current);

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if (delimiter_index !== -1) {

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while (state.scope.type == "coffee" && state.scope.prev)

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state.scope = state.scope.prev;

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if (state.scope.type == current)

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state.scope = state.scope.prev;

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}

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if (state.dedent && stream.eol()) {

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if (state.scope.type == "coffee" && state.scope.prev)

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state.scope = state.scope.prev;

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state.dedent = false;

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}

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return style;

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}

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var external = {

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startState: function(basecolumn) {

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return {

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tokenize: tokenBase,

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scope: {offset:basecolumn || 0, type:"coffee", prev: null, align: false},

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prop: false,

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dedent: 0

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};

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},

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token: function(stream, state) {

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var fillAlign = state.scope.align === null && state.scope;

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if (fillAlign && stream.sol()) fillAlign.align = false;

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var style = tokenLexer(stream, state);

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

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if (fillAlign) fillAlign.align = true;

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state.prop = style == "punctuation" && stream.current() == "."

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}

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return style;

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},

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indent: function(state, text) {

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if (state.tokenize != tokenBase) return 0;

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var scope = state.scope;

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var closer = text && "])}".indexOf(text.charAt(0)) > -1;

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if (closer) while (scope.type == "coffee" && scope.prev) scope = scope.prev;

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var closes = closer && scope.type === text.charAt(0);

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if (scope.align)

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return scope.alignOffset - (closes ? 1 : 0);

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else

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return (closes ? scope.prev : scope).offset;

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},

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lineComment: "#",

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fold: "indent"

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};

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return external;

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});

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

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CodeMirror.defineMIME("text/coffeescript", "coffeescript");

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});

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