1// CodeMirror, copyright (c) by Marijn Haverbeke and others
  2// Distributed under an MIT license: https://codemirror.net/LICENSE
  3
  4(function(mod) {
  5  if (typeof exports == "object" && typeof module == "object") // CommonJS
  6    mod(require("../../lib/codemirror"));
  7  else if (typeof define == "function" && define.amd) // AMD
  8    define(["../../lib/codemirror"], mod);
  9  else // Plain browser env
 10    mod(CodeMirror);
 11})(function(CodeMirror) {
 12"use strict";
 13
 14var rfc2822 = [
 15  "From", "Sender", "Reply-To", "To", "Cc", "Bcc", "Message-ID",
 16  "In-Reply-To", "References", "Resent-From", "Resent-Sender", "Resent-To",
 17  "Resent-Cc", "Resent-Bcc", "Resent-Message-ID", "Return-Path", "Received"
 18];
 19var rfc2822NoEmail = [
 20  "Date", "Subject", "Comments", "Keywords", "Resent-Date"
 21];
 22
 23CodeMirror.registerHelper("hintWords", "mbox", rfc2822.concat(rfc2822NoEmail));
 24
 25var whitespace = /^[ \t]/;
 26var separator = /^From /; // See RFC 4155
 27var rfc2822Header = new RegExp("^(" + rfc2822.join("|") + "): ");
 28var rfc2822HeaderNoEmail = new RegExp("^(" + rfc2822NoEmail.join("|") + "): ");
 29var header = /^[^:]+:/; // Optional fields defined in RFC 2822
 30var email = /^[^ ]+@[^ ]+/;
 31var untilEmail = /^.*?(?=[^ ]+?@[^ ]+)/;
 32var bracketedEmail = /^<.*?>/;
 33var untilBracketedEmail = /^.*?(?=<.*>)/;
 34
 35function styleForHeader(header) {
 36  if (header === "Subject") return "header";
 37  return "string";
 38}
 39
 40function readToken(stream, state) {
 41  if (stream.sol()) {
 42    // From last line
 43    state.inSeparator = false;
 44    if (state.inHeader && stream.match(whitespace)) {
 45      // Header folding
 46      return null;
 47    } else {
 48      state.inHeader = false;
 49      state.header = null;
 50    }
 51
 52    if (stream.match(separator)) {
 53      state.inHeaders = true;
 54      state.inSeparator = true;
 55      return "atom";
 56    }
 57
 58    var match;
 59    var emailPermitted = false;
 60    if ((match = stream.match(rfc2822HeaderNoEmail)) ||
 61        (emailPermitted = true) && (match = stream.match(rfc2822Header))) {
 62      state.inHeaders = true;
 63      state.inHeader = true;
 64      state.emailPermitted = emailPermitted;
 65      state.header = match[1];
 66      return "atom";
 67    }
 68
 69    // Use vim's heuristics: recognize custom headers only if the line is in a
 70    // block of legitimate headers.
 71    if (state.inHeaders && (match = stream.match(header))) {
 72      state.inHeader = true;
 73      state.emailPermitted = true;
 74      state.header = match[1];
 75      return "atom";
 76    }
 77
 78    state.inHeaders = false;
 79    stream.skipToEnd();
 80    return null;
 81  }
 82
 83  if (state.inSeparator) {
 84    if (stream.match(email)) return "link";
 85    if (stream.match(untilEmail)) return "atom";
 86    stream.skipToEnd();
 87    return "atom";
 88  }
 89
 90  if (state.inHeader) {
 91    var style = styleForHeader(state.header);
 92
 93    if (state.emailPermitted) {
 94      if (stream.match(bracketedEmail)) return style + " link";
 95      if (stream.match(untilBracketedEmail)) return style;
 96    }
 97    stream.skipToEnd();
 98    return style;
 99  }
100
101  stream.skipToEnd();
102  return null;
103};
104
105CodeMirror.defineMode("mbox", function() {
106  return {
107    startState: function() {
108      return {
109        // Is in a mbox separator
110        inSeparator: false,
111        // Is in a mail header
112        inHeader: false,
113        // If bracketed email is permitted. Only applicable when inHeader
114        emailPermitted: false,
115        // Name of current header
116        header: null,
117        // Is in a region of mail headers
118        inHeaders: false
119      };
120    },
121    token: readToken,
122    blankLine: function(state) {
123      state.inHeaders = state.inSeparator = state.inHeader = false;
124    }
125  };
126});
127
128CodeMirror.defineMIME("application/mbox", "mbox");
129});