1 files changed, 54 insertions, 0 deletions
diff --git a/comm/mail/extensions/openpgp/content/modules/singletons.jsm b/comm/mail/extensions/openpgp/content/modules/singletons.jsm
new file mode 100644
index 0000000000..eb1d6f45df
--- /dev/null
+++ b/comm/mail/extensions/openpgp/content/modules/singletons.jsm
@@ -0,0 +1,54 @@
+/* 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 https://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+var EXPORTED_SYMBOLS = ["EnigmailSingletons"];
+
+var EnigmailSingletons = {
+  // handle to most recent message reader window
+  messageReader: null,
+
+  // information about the last PGP/MIME decrypted message (mimeDecrypt)
+  lastDecryptedMessage: {},
+  lastMessageDecryptTime: 0,
+
+  clearLastDecryptedMessage() {
+    let lm = this.lastDecryptedMessage;
+    lm.lastMessageData = "";
+    lm.lastMessageURI = null;
+    lm.mimePartNumber = "";
+    lm.lastStatus = {};
+    lm.gossip = [];
+  },
+
+  isLastDecryptedMessagePart(folder, msgNum, mimePartNumber) {
+    let reval =
+      this.lastDecryptedMessage.lastMessageURI &&
+      this.lastDecryptedMessage.lastMessageURI.folder == folder &&
+      this.lastDecryptedMessage.lastMessageURI.msgNum == msgNum &&
+      this.lastDecryptedMessage.mimePartNumber == mimePartNumber;
+    return reval;
+  },
+
+  urisWithNestedEncryptedParts: [],
+
+  maxRecentSubEncryptionUrisToRemember: 10,
+
+  addUriWithNestedEncryptedPart(uri) {
+    if (
+      this.urisWithNestedEncryptedParts.length >
+      this.maxRecentSubEncryptionUrisToRemember
+    ) {
+      this.urisWithNestedEncryptedParts.shift(); // remove oldest
+    }
+    this.urisWithNestedEncryptedParts.push(uri);
+  },
+
+  isRecentUriWithNestedEncryptedPart(uri) {
+    return this.urisWithNestedEncryptedParts.includes(uri);
+  },
+};
+
+EnigmailSingletons.clearLastDecryptedMessage();