1 files changed, 512 insertions, 0 deletions
diff --git a/mailnews/mime/src/mimeJSComponents.js b/mailnews/mime/src/mimeJSComponents.js
new file mode 100644
index 000000000..5ba7ff084
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+++ b/mailnews/mime/src/mimeJSComponents.js
@@ -0,0 +1,512 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+Components.utils.import("resource://gre/modules/Deprecated.jsm");
+Components.utils.import("resource:///modules/jsmime.jsm");
+Components.utils.import("resource:///modules/mimeParser.jsm");
+Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+
+function HeaderHandler() {
+  this.value = "";
+  this.deliverData = function (str) { this.value += str; };
+  this.deliverEOF = function () {};
+}
+
+function StringEnumerator(iterator) {
+  this._iterator = iterator;
+  this._next = undefined;
+}
+StringEnumerator.prototype = {
+  QueryInterface: XPCOMUtils.generateQI([
+    Components.interfaces.nsIUTF8StringEnumerator]),
+  _setNext: function () {
+    if (this._next !== undefined)
+      return;
+    this._next = this._iterator.next();
+  },
+  hasMore: function () {
+    this._setNext();
+    return !this._next.done;
+  },
+  getNext: function () {
+    this._setNext();
+    let result = this._next;
+    this._next = undefined;
+    if (result.done)
+      throw Components.results.NS_ERROR_UNEXPECTED;
+    return result.value;
+  }
+};
+
+/**
+ * If we get XPConnect-wrapped objects for msgIAddressObjects, we will have
+ * properties defined for 'group' that throws off jsmime. This function converts
+ * the addresses into the form that jsmime expects.
+ */
+function fixXpconnectAddresses(addrs) {
+  return addrs.map((addr) => {
+    // This is ideally !addr.group, but that causes a JS strict warning, if
+    // group is not in addr, since that's enabled in all chrome code now.
+    if (!('group' in addr) || addr.group === undefined || addr.group === null) {
+      return MimeAddressParser.prototype.makeMailboxObject(addr.name,
+        addr.email);
+    } else {
+      return MimeAddressParser.prototype.makeGroupObject(addr.name,
+        fixXpconnectAddresses(addr.group));
+    }
+  });
+}
+
+/**
+ * This is a base handler for supporting msgIStructuredHeaders, since we have
+ * two implementations that need the readable aspects of the interface.
+ */
+function MimeStructuredHeaders() {
+}
+MimeStructuredHeaders.prototype = {
+  getHeader: function (aHeaderName) {
+    let name = aHeaderName.toLowerCase();
+    return this._headers.get(name);
+  },
+
+  hasHeader: function (aHeaderName) {
+    return this._headers.has(aHeaderName.toLowerCase());
+  },
+
+  getUnstructuredHeader: function (aHeaderName) {
+    let result = this.getHeader(aHeaderName);
+    if (result === undefined || typeof result == "string")
+      return result;
+    throw Components.results.NS_ERROR_ILLEGAL_VALUE;
+  },
+
+  getAddressingHeader: function (aHeaderName, aPreserveGroups, count) {
+    let addrs = this.getHeader(aHeaderName);
+    if (addrs === undefined) {
+      addrs = [];
+    } else if (!Array.isArray(addrs)) {
+      throw Components.results.NS_ERROR_ILLEGAL_VALUE;
+    }
+    return fixArray(addrs, aPreserveGroups, count);
+  },
+
+  getRawHeader: function (aHeaderName) {
+    let result = this.getHeader(aHeaderName);
+    if (result === undefined)
+      return result;
+
+    let value = jsmime.headeremitter.emitStructuredHeader(aHeaderName,
+      result, {});
+    // Strip off the header name and trailing whitespace before returning...
+    value = value.substring(aHeaderName.length + 2).trim();
+    // ... as well as embedded newlines.
+    value = value.replace(/\r\n/g, '');
+    return value;
+  },
+
+  get headerNames() {
+    return new StringEnumerator(this._headers.keys());
+  },
+
+  buildMimeText: function () {
+    if (this._headers.size == 0) {
+      return "";
+    }
+    let handler = new HeaderHandler();
+    let emitter = jsmime.headeremitter.makeStreamingEmitter(handler, {
+      useASCII: true
+    });
+    for (let [value, header] of this._headers) {
+      emitter.addStructuredHeader(value, header);
+    }
+    emitter.finish();
+    return handler.value;
+  },
+};
+
+
+function MimeHeaders() {
+}
+MimeHeaders.prototype = {
+  __proto__: MimeStructuredHeaders.prototype,
+  classDescription: "Mime headers implementation",
+  classID: Components.ID("d1258011-f391-44fd-992e-c6f4b461a42f"),
+  contractID: "@mozilla.org/messenger/mimeheaders;1",
+  QueryInterface: XPCOMUtils.generateQI([Components.interfaces.nsIMimeHeaders,
+    Components.interfaces.msgIStructuredHeaders]),
+
+  initialize: function MimeHeaders_initialize(allHeaders) {
+    this._headers = MimeParser.extractHeaders(allHeaders);
+  },
+
+  extractHeader: function MimeHeaders_extractHeader(header, getAll) {
+    if (!this._headers)
+      throw Components.results.NS_ERROR_NOT_INITIALIZED;
+    // Canonicalized to lower-case form
+    header = header.toLowerCase();
+    if (!this._headers.has(header))
+      return null;
+    var values = this._headers.getRawHeader(header);
+    if (getAll)
+      return values.join(",\r\n\t");
+    else
+      return values[0];
+  },
+
+  get allHeaders() {
+    return this._headers.rawHeaderText;
+  }
+};
+
+function MimeWritableStructuredHeaders() {
+  this._headers = new Map();
+}
+MimeWritableStructuredHeaders.prototype = {
+  __proto__: MimeStructuredHeaders.prototype,
+  classID: Components.ID("c560806a-425f-4f0f-bf69-397c58c599a7"),
+  QueryInterface: XPCOMUtils.generateQI([
+    Components.interfaces.msgIStructuredHeaders,
+    Components.interfaces.msgIWritableStructuredHeaders]),
+
+  setHeader: function (aHeaderName, aValue) {
+    this._headers.set(aHeaderName.toLowerCase(), aValue);
+  },
+
+  deleteHeader: function (aHeaderName) {
+    this._headers.delete(aHeaderName.toLowerCase());
+  },
+
+  addAllHeaders: function (aHeaders) {
+    let headerList = aHeaders.headerNames;
+    while (headerList.hasMore()) {
+      let header = headerList.getNext();
+      this.setHeader(header, aHeaders.getHeader(header));
+    }
+  },
+
+  setUnstructuredHeader: function (aHeaderName, aValue) {
+    this.setHeader(aHeaderName, aValue);
+  },
+
+  setAddressingHeader: function (aHeaderName, aAddresses, aCount) {
+    this.setHeader(aHeaderName, fixXpconnectAddresses(aAddresses));
+  },
+
+  setRawHeader: function (aHeaderName, aValue, aCharset) {
+    aValue = jsmime.headerparser.convert8BitHeader(aValue, aCharset);
+    try {
+      this.setHeader(aHeaderName,
+        jsmime.headerparser.parseStructuredHeader(aHeaderName, aValue));
+    } catch (e) {
+      // This means we don't have a structured encoder. Just assume it's a raw
+      // string value then.
+      this.setHeader(aHeaderName, aValue);
+    }
+  }
+};
+
+// These are prototypes for nsIMsgHeaderParser implementation
+var Mailbox = {
+  toString: function () {
+    return this.name ? this.name + " <" + this.email + ">" : this.email;
+  }
+};
+
+var EmailGroup = {
+  toString: function () {
+    return this.name + ": " + this.group.map(x => x.toString()).join(", ");
+  }
+};
+
+// A helper method for parse*Header that takes into account the desire to
+// preserve group and also tweaks the output to support the prototypes for the
+// XPIDL output.
+function fixArray(addresses, preserveGroups, count) {
+  function resetPrototype(obj, prototype) {
+    let prototyped = Object.create(prototype);
+    for (let key of Object.getOwnPropertyNames(obj)) {
+      if (typeof obj[key] == "string") {
+        prototyped[key] = obj[key].replace(/\x00/g, '');
+      } else {
+        prototyped[key] = obj[key];
+      }
+    }
+    return prototyped;
+  }
+  let outputArray = [];
+  for (let element of addresses) {
+    if ('group' in element) {
+      // Fix up the prototypes of the group and the list members
+      element = resetPrototype(element, EmailGroup);
+      element.group = element.group.map(e => resetPrototype(e, Mailbox));
+
+      // Add to the output array
+      if (preserveGroups)
+        outputArray.push(element);
+      else
+        outputArray = outputArray.concat(element.group);
+    } else {
+      element = resetPrototype(element, Mailbox);
+      outputArray.push(element);
+    }
+  }
+
+  if (count)
+    count.value = outputArray.length;
+  return outputArray;
+}
+
+function MimeAddressParser() {
+}
+MimeAddressParser.prototype = {
+  classID: Components.ID("96bd8769-2d0e-4440-963d-22b97fb3ba77"),
+  QueryInterface: XPCOMUtils.generateQI([Components.interfaces.nsIMsgHeaderParser]),
+
+  parseEncodedHeader: function (aHeader, aCharset, aPreserveGroups, count) {
+    aHeader = aHeader || "";
+    let value = MimeParser.parseHeaderField(aHeader,
+      MimeParser.HEADER_ADDRESS | MimeParser.HEADER_OPTION_ALL_I18N, aCharset);
+    return fixArray(value, aPreserveGroups, count);
+  },
+  parseDecodedHeader: function (aHeader, aPreserveGroups, count) {
+    aHeader = aHeader || "";
+    let value = MimeParser.parseHeaderField(aHeader, MimeParser.HEADER_ADDRESS);
+    return fixArray(value, aPreserveGroups, count);
+  },
+
+  makeMimeHeader: function (addresses, length) {
+    addresses = fixXpconnectAddresses(addresses);
+    // Don't output any necessary continuations, so make line length as large as
+    // possible first.
+    let options = {
+      softMargin: 900,
+      hardMargin: 900,
+      useASCII: false // We don't want RFC 2047 encoding here.
+    };
+    let handler = new HeaderHandler();
+    let emitter = new jsmime.headeremitter.makeStreamingEmitter(handler,
+      options);
+    emitter.addAddresses(addresses);
+    emitter.finish(true);
+    return handler.value.replace(/\r\n( |$)/g, '');
+  },
+
+  extractFirstName: function (aHeader) {
+    let address = this.parseDecodedHeader(aHeader, false)[0];
+    return address.name || address.email;
+  },
+
+  removeDuplicateAddresses: function (aAddrs, aOtherAddrs) {
+    // This is actually a rather complicated algorithm, especially if we want to
+    // preserve group structure. Basically, we use a set to identify which
+    // headers we have seen and therefore want to remove. To work in several
+    // various forms of edge cases, we need to normalize the entries in that
+    // structure.
+    function normalize(email) {
+      // XXX: This algorithm doesn't work with IDN yet. It looks like we have to
+      // convert from IDN then do lower case, but I haven't confirmed yet.
+      return email.toLowerCase();
+    }
+
+    // The filtration function, which removes email addresses that are
+    // duplicates of those we have already seen.
+    function filterAccept(e) {
+      if ('email' in e) {
+        // If we've seen the address, don't keep this one; otherwise, add it to
+        // the list.
+        let key = normalize(e.email);
+        if (allAddresses.has(key))
+          return false;
+        allAddresses.add(key);
+      } else {
+        // Groups -> filter out all the member addresses.
+        e.group = e.group.filter(filterAccept);
+      }
+      return true;
+    }
+
+    // First, collect all of the emails to forcibly delete.
+    let allAddresses = new Set();
+    for (let element of this.parseDecodedHeader(aOtherAddrs, false)) {
+      allAddresses.add(normalize(element.email));
+    }
+
+    // The actual data to filter
+    let filtered = this.parseDecodedHeader(aAddrs, true).filter(filterAccept);
+    return this.makeMimeHeader(filtered);
+  },
+
+  makeMailboxObject: function (aName, aEmail) {
+    let object = Object.create(Mailbox);
+    object.name = aName;
+    object.email = aEmail ? aEmail.trim() : aEmail;
+    return object;
+  },
+
+  makeGroupObject: function (aName, aMembers) {
+    let object = Object.create(EmailGroup);
+    object.name = aName;
+    object.group = aMembers;
+    return object;
+  },
+
+  makeFromDisplayAddress: function (aDisplay, count) {
+    // The basic idea is to split on every comma, so long as there is a
+    // preceding @.
+    let output = [];
+    while (aDisplay.length) {
+      let at = aDisplay.indexOf('@');
+      let comma = aDisplay.indexOf(',', at + 1);
+      let addr;
+      if (comma > 0) {
+        addr = aDisplay.substr(0, comma);
+        aDisplay = aDisplay.substr(comma + 1);
+      } else {
+        addr = aDisplay;
+        aDisplay = "";
+      }
+      output.push(this._makeSingleAddress(addr.trimLeft()));
+    }
+    if (count)
+      count.value = output.length;
+    return output;
+  },
+
+  /// Construct a single email address from a name <local@domain> token.
+  _makeSingleAddress: function (aDisplayName) {
+    if (aDisplayName.includes('<')) {
+      let lbracket = aDisplayName.lastIndexOf('<');
+      let rbracket = aDisplayName.lastIndexOf('>');
+      return this.makeMailboxObject(
+        lbracket == 0 ? '' : aDisplayName.slice(0, lbracket).trim(),
+        aDisplayName.slice(lbracket + 1, rbracket));
+    } else {
+      return this.makeMailboxObject('', aDisplayName);
+    }
+  },
+
+  // What follows is the deprecated API that will be removed shortly.
+
+  parseHeadersWithArray: function (aHeader, aAddrs, aNames, aFullNames) {
+    let addrs = [], names = [], fullNames = [];
+    // Parse header, but without HEADER_OPTION_ALLOW_RAW.
+    let value = MimeParser.parseHeaderField(aHeader || "",
+                                            MimeParser.HEADER_ADDRESS |
+                                            MimeParser.HEADER_OPTION_DECODE_2231 |
+                                            MimeParser.HEADER_OPTION_DECODE_2047,
+                                            undefined);
+    let allAddresses = fixArray(value, false);
+
+    // Don't index the dummy empty address.
+    if (aHeader.trim() == "")
+      allAddresses = [];
+    for (let address of allAddresses) {
+      addrs.push(address.email);
+      names.push(address.name || null);
+      fullNames.push(address.toString());
+    }
+
+    aAddrs.value = addrs;
+    aNames.value = names;
+    aFullNames.value = fullNames;
+    return allAddresses.length;
+  },
+
+  extractHeaderAddressMailboxes: function (aLine) {
+    return this.parseDecodedHeader(aLine).map(addr => addr.email).join(", ");
+  },
+
+  extractHeaderAddressNames: function (aLine) {
+    return this.parseDecodedHeader(aLine).map(addr => addr.name || addr.email)
+                                         .join(", ");
+  },
+
+  extractHeaderAddressName: function (aLine) {
+    let addrs = this.parseDecodedHeader(aLine).map(addr =>
+                 addr.name || addr.email);
+    return addrs.length == 0 ? "" : addrs[0];
+  },
+
+  makeMimeAddress: function (aName, aEmail) {
+    let object = this.makeMailboxObject(aName, aEmail);
+    return this.makeMimeHeader([object]);
+  },
+};
+
+function MimeConverter() {
+}
+MimeConverter.prototype = {
+  classID: Components.ID("93f8c049-80ed-4dda-9000-94ad8daba44c"),
+  QueryInterface: XPCOMUtils.generateQI([Components.interfaces.nsIMimeConverter]),
+
+  encodeMimePartIIStr_UTF8: function (aHeader, aStructured, aCharset,
+      aFieldNameLen, aLineLength) {
+    // The JSMime encoder only works in UTF-8, so if someone requests to not do
+    // it, they need to change their code.
+    if (aCharset.toLowerCase() != "utf-8") {
+      Deprecated.warning("Encoding to non-UTF-8 values is obsolete",
+        "http://bugzilla.mozilla.org/show_bug.cgi?id=790855");
+    }
+
+    // Compute the encoding options. The way our API is structured in this
+    // method is really horrendous and does not align with the way that JSMime
+    // handles it. Instead, we'll need to create a fake header to take into
+    // account the aFieldNameLen parameter.
+    let fakeHeader = '-'.repeat(aFieldNameLen);
+    let options = {
+      softMargin: aLineLength,
+      useASCII: true,
+    };
+    let handler = new HeaderHandler();
+    let emitter = new jsmime.headeremitter.makeStreamingEmitter(handler,
+      options);
+
+    // Add the text to the be encoded.
+    emitter.addHeaderName(fakeHeader);
+    if (aStructured) {
+      // Structured really means "this is an addressing header"
+      let addresses = MimeParser.parseHeaderField(aHeader,
+        MimeParser.HEADER_ADDRESS | MimeParser.HEADER_OPTION_DECODE_2047);
+      // This happens in one of our tests if there is a "bare" email but no
+      // @ sign. Without it, the result disappears since our emission code
+      // assumes that an empty email is not worth emitting.
+      if (addresses.length === 1 && addresses[0].email === "" &&
+          addresses[0].name !== "") {
+        addresses[0].email = addresses[0].name;
+        addresses[0].name = "";
+      }
+      emitter.addAddresses(addresses);
+    } else {
+      emitter.addUnstructured(aHeader);
+    }
+
+    // Compute the output. We need to strip off the fake prefix added earlier
+    // and the extra CRLF at the end.
+    emitter.finish(true);
+    let value = handler.value;
+    value = value.replace(new RegExp(fakeHeader + ":\\s*"), "");
+    return value.substring(0, value.length - 2);
+  },
+
+  decodeMimeHeader: function (aHeader, aDefaultCharset, aOverride, aUnfold) {
+    let value = MimeParser.parseHeaderField(aHeader,
+      MimeParser.HEADER_UNSTRUCTURED | MimeParser.HEADER_OPTION_ALL_I18N,
+      aDefaultCharset);
+    if (aUnfold) {
+      value = value.replace(/[\r\n]\t/g, ' ')
+                   .replace(/[\r\n]/g, '');
+    }
+    return value;
+  },
+
+  // This is identical to the above, except for factors that are handled by the
+  // xpconnect conversion process
+  decodeMimeHeaderToUTF8: function () {
+    return this.decodeMimeHeader.apply(this, arguments);
+  },
+};
+
+var components = [MimeHeaders, MimeWritableStructuredHeaders, MimeAddressParser,
+  MimeConverter];
+var NSGetFactory = XPCOMUtils.generateNSGetFactory(components);