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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('smalltalk', function(config) {

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var specialChars = /[+\-\/\\*~<>=@%|&?!.,:;^]/;

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var Context = function(tokenizer, parent) {

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this.next = tokenizer;

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this.parent = parent;

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};

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var Token = function(name, context, eos) {

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this.name = name;

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this.context = context;

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this.eos = eos;

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};

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var State = function() {

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this.context = new Context(next, null);

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this.expectVariable = true;

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this.indentation = 0;

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this.userIndentationDelta = 0;

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};

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State.prototype.userIndent = function(indentation) {

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this.userIndentationDelta = indentation > 0 ? (indentation / config.indentUnit - this.indentation) : 0;

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};

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var next = function(stream, context, state) {

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var token = new Token(null, context, false);

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var aChar = stream.next();

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if (aChar === '"') {

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token = nextComment(stream, new Context(nextComment, context));

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} else if (aChar === '\'') {

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token = nextString(stream, new Context(nextString, context));

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} else if (aChar === '#') {

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if (stream.peek() === '\'') {

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stream.next();

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token = nextSymbol(stream, new Context(nextSymbol, context));

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} else {

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if (stream.eatWhile(/[^\s.{}\[\]()]/))

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token.name = 'string-2';

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else

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token.name = 'meta';

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}

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} else if (aChar === '$') {

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if (stream.next() === '<') {

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stream.eatWhile(/[^\s>]/);

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stream.next();

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}

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token.name = 'string-2';

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} else if (aChar === '|' && state.expectVariable) {

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token.context = new Context(nextTemporaries, context);

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} else if (/[\[\]{}()]/.test(aChar)) {

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token.name = 'bracket';

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token.eos = /[\[{(]/.test(aChar);

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if (aChar === '[') {

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state.indentation++;

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} else if (aChar === ']') {

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state.indentation = Math.max(0, state.indentation - 1);

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}

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} else if (specialChars.test(aChar)) {

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stream.eatWhile(specialChars);

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token.name = 'operator';

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token.eos = aChar !== ';'; // ; cascaded message expression

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} else if (/\d/.test(aChar)) {

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

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token.name = 'number';

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} else if (/[\w_]/.test(aChar)) {

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

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token.name = state.expectVariable ? (keywords.test(stream.current()) ? 'keyword' : 'variable') : null;

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} else {

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token.eos = state.expectVariable;

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}

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return token;

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};

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var nextComment = function(stream, context) {

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

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return new Token('comment', stream.eat('"') ? context.parent : context, true);

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};

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var nextString = function(stream, context) {

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

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return new Token('string', stream.eat('\'') ? context.parent : context, false);

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};

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var nextSymbol = function(stream, context) {

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

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return new Token('string-2', stream.eat('\'') ? context.parent : context, false);

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};

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var nextTemporaries = function(stream, context) {

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var token = new Token(null, context, false);

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var aChar = stream.next();

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if (aChar === '|') {

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token.context = context.parent;

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token.eos = true;

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} else {

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

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token.name = 'variable';

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}

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return token;

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};

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return {

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startState: function() {

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return new State;

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token: function(stream, state) {

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state.userIndent(stream.indentation());

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if (stream.eatSpace()) {

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return null;

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}

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var token = state.context.next(stream, state.context, state);

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state.context = token.context;

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state.expectVariable = token.eos;

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return token.name;

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blankLine: function(state) {

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state.userIndent(0);

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indent: function(state, textAfter) {

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var i = state.context.next === next && textAfter && textAfter.charAt(0) === ']' ? -1 : state.userIndentationDelta;

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return (state.indentation + i) * config.indentUnit;

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electricChars: ']'

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};

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});

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CodeMirror.defineMIME('text/x-stsrc', {name: 'smalltalk'});

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});

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