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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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var rfc2822 = [

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"From", "Sender", "Reply-To", "To", "Cc", "Bcc", "Message-ID",

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"In-Reply-To", "References", "Resent-From", "Resent-Sender", "Resent-To",

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"Resent-Cc", "Resent-Bcc", "Resent-Message-ID", "Return-Path", "Received"

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];

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var rfc2822NoEmail = [

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"Date", "Subject", "Comments", "Keywords", "Resent-Date"

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];

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CodeMirror.registerHelper("hintWords", "mbox", rfc2822.concat(rfc2822NoEmail));

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var whitespace = /^[ \t]/;

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var separator = /^From /; // See RFC 4155

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var rfc2822Header = new RegExp("^(" + rfc2822.join("|") + "): ");

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var rfc2822HeaderNoEmail = new RegExp("^(" + rfc2822NoEmail.join("|") + "): ");

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var header = /^[^:]+:/; // Optional fields defined in RFC 2822

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var email = /^[^ ]+@[^ ]+/;

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var untilEmail = /^.*?(?=[^ ]+?@[^ ]+)/;

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var bracketedEmail = /^<.*?>/;

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var untilBracketedEmail = /^.*?(?=<.*>)/;

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function styleForHeader(header) {

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if (header === "Subject") return "header";

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return "string";

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}

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function readToken(stream, state) {

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if (stream.sol()) {

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// From last line

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state.inSeparator = false;

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if (state.inHeader && stream.match(whitespace)) {

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// Header folding

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return null;

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} else {

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state.inHeader = false;

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state.header = null;

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}

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if (stream.match(separator)) {

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state.inHeaders = true;

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state.inSeparator = true;

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return "atom";

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}

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var match;

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var emailPermitted = false;

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if ((match = stream.match(rfc2822HeaderNoEmail)) ||

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(emailPermitted = true) && (match = stream.match(rfc2822Header))) {

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state.inHeaders = true;

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state.inHeader = true;

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state.emailPermitted = emailPermitted;

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state.header = match[1];

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return "atom";

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}

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// Use vim's heuristics: recognize custom headers only if the line is in a

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// block of legitimate headers.

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if (state.inHeaders && (match = stream.match(header))) {

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state.inHeader = true;

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state.emailPermitted = true;

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state.header = match[1];

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return "atom";

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}

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state.inHeaders = false;

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stream.skipToEnd();

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return null;

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}

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if (state.inSeparator) {

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if (stream.match(email)) return "link";

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if (stream.match(untilEmail)) return "atom";

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stream.skipToEnd();

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return "atom";

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}

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if (state.inHeader) {

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var style = styleForHeader(state.header);

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if (state.emailPermitted) {

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if (stream.match(bracketedEmail)) return style + " link";

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if (stream.match(untilBracketedEmail)) return style;

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}

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stream.skipToEnd();

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return style;

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}

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stream.skipToEnd();

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return null;

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};

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CodeMirror.defineMode("mbox", function() {

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return {

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startState: function() {

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return {

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// Is in a mbox separator

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inSeparator: false,

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// Is in a mail header

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inHeader: false,

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// If bracketed email is permitted. Only applicable when inHeader

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emailPermitted: false,

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// Name of current header

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header: null,

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// Is in a region of mail headers

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inHeaders: false

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};

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token: readToken,

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blankLine: function(state) {

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state.inHeaders = state.inSeparator = state.inHeader = false;

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}

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};

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});

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CodeMirror.defineMIME("application/mbox", "mbox");

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});

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