// 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("../markdown/markdown"), require("../../addon/mode/overlay"));

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

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define(["../../lib/codemirror", "../markdown/markdown", "../../addon/mode/overlay"], 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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var urlRE = /^((?:(?:aaas?|about|acap|adiumxtra|af[ps]|aim|apt|attachment|aw|beshare|bitcoin|bolo|callto|cap|chrome(?:-extension)?|cid|coap|com-eventbrite-attendee|content|crid|cvs|data|dav|dict|dlna-(?:playcontainer|playsingle)|dns|doi|dtn|dvb|ed2k|facetime|feed|file|finger|fish|ftp|geo|gg|git|gizmoproject|go|gopher|gtalk|h323|hcp|https?|iax|icap|icon|im|imap|info|ipn|ipp|irc[6s]?|iris(?:\.beep|\.lwz|\.xpc|\.xpcs)?|itms|jar|javascript|jms|keyparc|lastfm|ldaps?|magnet|mailto|maps|market|message|mid|mms|ms-help|msnim|msrps?|mtqp|mumble|mupdate|mvn|news|nfs|nih?|nntp|notes|oid|opaquelocktoken|palm|paparazzi|platform|pop|pres|proxy|psyc|query|res(?:ource)?|rmi|rsync|rtmp|rtsp|secondlife|service|session|sftp|sgn|shttp|sieve|sips?|skype|sm[bs]|snmp|soap\.beeps?|soldat|spotify|ssh|steam|svn|tag|teamspeak|tel(?:net)?|tftp|things|thismessage|tip|tn3270|tv|udp|unreal|urn|ut2004|vemmi|ventrilo|view-source|webcal|wss?|wtai|wyciwyg|xcon(?:-userid)?|xfire|xmlrpc\.beeps?|xmpp|xri|ymsgr|z39\.50[rs]?):(?:\/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}\/)(?:[^\s()<>]|\([^\s()<>]*\))+(?:\([^\s()<>]*\)|[^\s`*!()\[\]{};:'".,<>?«»“”‘’]))/i

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CodeMirror.defineMode("gfm", function(config, modeConfig) {

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var codeDepth = 0;

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function blankLine(state) {

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state.code = false;

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return null;

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}

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var gfmOverlay = {

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startState: function() {

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return {

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code: false,

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codeBlock: false,

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ateSpace: false

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};

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},

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copyState: function(s) {

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return {

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code: s.code,

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codeBlock: s.codeBlock,

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ateSpace: s.ateSpace

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};

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},

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token: function(stream, state) {

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state.combineTokens = null;

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// Hack to prevent formatting override inside code blocks (block and inline)

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if (state.codeBlock) {

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if (stream.match(/^```+/)) {

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state.codeBlock = false;

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return null;

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}

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stream.skipToEnd();

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return null;

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}

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if (stream.sol()) {

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state.code = false;

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}

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if (stream.sol() && stream.match(/^```+/)) {

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stream.skipToEnd();

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state.codeBlock = true;

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return null;

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}

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// If this block is changed, it may need to be updated in Markdown mode

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

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stream.next();

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var before = stream.pos;

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stream.eatWhile('`');

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var difference = 1 + stream.pos - before;

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if (!state.code) {

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codeDepth = difference;

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state.code = true;

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} else {

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if (difference === codeDepth) { // Must be exact

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state.code = false;

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}

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}

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return null;

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} else if (state.code) {

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stream.next();

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return null;

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}

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// Check if space. If so, links can be formatted later on

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if (stream.eatSpace()) {

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state.ateSpace = true;

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return null;

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}

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if (stream.sol() || state.ateSpace) {

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state.ateSpace = false;

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if (modeConfig.gitHubSpice !== false) {

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if(stream.match(/^(?:[a-zA-Z0-9\-_]+\/)?(?:[a-zA-Z0-9\-_]+@)?(?:[a-f0-9]{7,40}\b)/)) {

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// User/Project@SHA

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// User@SHA

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// SHA

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state.combineTokens = true;

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return "link";

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} else if (stream.match(/^(?:[a-zA-Z0-9\-_]+\/)?(?:[a-zA-Z0-9\-_]+)?#[0-9]+\b/)) {

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// User/Project#Num

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// User#Num

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// #Num

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state.combineTokens = true;

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return "link";

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}

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}

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}

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if (stream.match(urlRE) &&

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stream.string.slice(stream.start - 2, stream.start) != "](" &&

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(stream.start == 0 || /\W/.test(stream.string.charAt(stream.start - 1)))) {

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// URLs

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// Taken from http://daringfireball.net/2010/07/improved_regex_for_matching_urls

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// And then (issue #1160) simplified to make it not crash the Chrome Regexp engine

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// And then limited url schemes to the CommonMark list, so foo:bar isn't matched as a URL

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state.combineTokens = true;

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return "link";

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}

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stream.next();

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return null;

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},

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blankLine: blankLine

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};

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var markdownConfig = {

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underscoresBreakWords: false,

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taskLists: true,

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fencedCodeBlocks: '```',

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strikethrough: true

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};

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for (var attr in modeConfig) {

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markdownConfig[attr] = modeConfig[attr];

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}

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markdownConfig.name = "markdown";

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return CodeMirror.overlayMode(CodeMirror.getMode(config, markdownConfig), gfmOverlay);

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}, "markdown");

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

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});

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