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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"), require("../javascript/javascript"));

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else if (typeof define == "function" && define.amd) // AMD

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define(["../../lib/codemirror", "../javascript/javascript"], 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("pegjs", function (config) {

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var jsMode = CodeMirror.getMode(config, "javascript");

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function identifier(stream) {

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return stream.match(/^[a-zA-Z_][a-zA-Z0-9_]*/);

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}

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return {

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startState: function () {

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return {

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inString: false,

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stringType: null,

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inComment: false,

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inCharacterClass: false,

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braced: 0,

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lhs: true,

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localState: null

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};

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token: function (stream, state) {

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if (stream)

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//check for state changes

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if (!state.inString && !state.inComment && ((stream.peek() == '"') || (stream.peek() == "'"))) {

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state.stringType = stream.peek();

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stream.next(); // Skip quote

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state.inString = true; // Update state

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}

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if (!state.inString && !state.inComment && stream.match(/^\/\*/)) {

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state.inComment = true;

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}

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//return state

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if (state.inString) {

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while (state.inString && !stream.eol()) {

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if (stream.peek() === state.stringType) {

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stream.next(); // Skip quote

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state.inString = false; // Clear flag

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

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stream.next();

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stream.next();

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} else {

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

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}

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}

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return state.lhs ? "property string" : "string"; // Token style

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} else if (state.inComment) {

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while (state.inComment && !stream.eol()) {

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if (stream.match(/\*\//)) {

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state.inComment = false; // Clear flag

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} else {

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stream.match(/^.[^\*]*/);

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}

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}

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return "comment";

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} else if (state.inCharacterClass) {

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while (state.inCharacterClass && !stream.eol()) {

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if (!(stream.match(/^[^\]\\]+/) || stream.match(/^\\./))) {

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state.inCharacterClass = false;

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}

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}

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} else if (stream.peek() === '[') {

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stream.next();

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state.inCharacterClass = true;

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return 'bracket';

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} else if (stream.match(/^\/\//)) {

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stream.skipToEnd();

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return "comment";

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} else if (state.braced || stream.peek() === '{') {

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if (state.localState === null) {

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state.localState = CodeMirror.startState(jsMode);

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}

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var token = jsMode.token(stream, state.localState);

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var text = stream.current();

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if (!token) {

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for (var i = 0; i < text.length; i++) {

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if (text[i] === '{') {

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state.braced++;

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} else if (text[i] === '}') {

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state.braced--;

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}

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};

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}

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return token;

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} else if (identifier(stream)) {

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

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return 'variable';

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}

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return 'variable-2';

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} else if (['[', ']', '(', ')'].indexOf(stream.peek()) != -1) {

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stream.next();

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return 'bracket';

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} else if (!stream.eatSpace()) {

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stream.next();

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}

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return null;

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}

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};

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}, "javascript");

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});

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