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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("turtle", function(config) {

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var indentUnit = config.indentUnit;

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var curPunc;

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function wordRegexp(words) {

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return new RegExp("^(?:" + words.join("|") + ")$", "i");

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}

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var ops = wordRegexp([]);

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var keywords = wordRegexp(["@prefix", "@base", "a"]);

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var operatorChars = /[*+\-<>=&|]/;

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function tokenBase(stream, state) {

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var ch = stream.next();

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curPunc = null;

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if (ch == "<" && !stream.match(/^[\s\u00a0=]/, false)) {

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stream.match(/^[^\s\u00a0>]*>?/);

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return "atom";

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}

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else if (ch == "\"" || ch == "'") {

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state.tokenize = tokenLiteral(ch);

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return state.tokenize(stream, state);

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}

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else if (/[{},\.;\[\]]/.test(ch)) {

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curPunc = ch;

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return null;

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}

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else if (ch == "#") {

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stream.skipToEnd();

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return "comment";

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}

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else if (operatorChars.test(ch)) {

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stream.eatWhile(operatorChars);

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return null;

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}

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else if (ch == ":") {

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return "operator";

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} else {

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

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

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return "variable-3";

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} else {

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var word = stream.current();

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if(keywords.test(word)) {

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return "meta";

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}

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if(ch >= "A" && ch <= "Z") {

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return "comment";

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} else {

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return "keyword";

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}

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}

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var word = stream.current();

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if (ops.test(word))

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return null;

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else if (keywords.test(word))

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return "meta";

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else

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return "variable";

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}

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}

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function tokenLiteral(quote) {

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return function(stream, state) {

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var escaped = false, ch;

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

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if (ch == quote && !escaped) {

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state.tokenize = tokenBase;

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break;

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}

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escaped = !escaped && ch == "\\";

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}

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return "string";

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};

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}

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function pushContext(state, type, col) {

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state.context = {prev: state.context, indent: state.indent, col: col, type: type};

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}

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function popContext(state) {

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state.indent = state.context.indent;

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state.context = state.context.prev;

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}

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return {

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startState: function() {

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return {tokenize: tokenBase,

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context: null,

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indent: 0,

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col: 0};

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token: function(stream, state) {

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if (stream.sol()) {

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if (state.context && state.context.align == null) state.context.align = false;

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state.indent = stream.indentation();

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}

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if (stream.eatSpace()) return null;

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

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if (style != "comment" && state.context && state.context.align == null && state.context.type != "pattern") {

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state.context.align = true;

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}

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if (curPunc == "(") pushContext(state, ")", stream.column());

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else if (curPunc == "[") pushContext(state, "]", stream.column());

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else if (curPunc == "{") pushContext(state, "}", stream.column());

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

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while (state.context && state.context.type == "pattern") popContext(state);

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if (state.context && curPunc == state.context.type) popContext(state);

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}

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else if (curPunc == "." && state.context && state.context.type == "pattern") popContext(state);

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else if (/atom|string|variable/.test(style) && state.context) {

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if (/[\}\]]/.test(state.context.type))

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pushContext(state, "pattern", stream.column());

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else if (state.context.type == "pattern" && !state.context.align) {

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state.context.align = true;

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state.context.col = stream.column();

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}

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}

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return style;

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indent: function(state, textAfter) {

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var firstChar = textAfter && textAfter.charAt(0);

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var context = state.context;

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if (/[\]\}]/.test(firstChar))

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while (context && context.type == "pattern") context = context.prev;

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var closing = context && firstChar == context.type;

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if (!context)

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return 0;

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else if (context.type == "pattern")

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return context.col;

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else if (context.align)

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return context.col + (closing ? 0 : 1);

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else

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return context.indent + (closing ? 0 : indentUnit);

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lineComment: "#"

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};

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});

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

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});

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