1 files changed, 67 insertions, 0 deletions
diff --git a/chrome/content/preventCaching/bitmaskAmOfflineOverlay.js b/chrome/content/preventCaching/bitmaskAmOfflineOverlay.js
new file mode 100644
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+++ b/chrome/content/preventCaching/bitmaskAmOfflineOverlay.js
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+/**
+ * preventCachingOverlay.js
+ * Copyright (C) 2013 LEAP
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along
+ */
+
+
+// The following variable will hold the current account being edited after
+// onPreInit() is called.
+var currentAccount = null;
+
+
+// The following function disables UI items that would allow a user to turn
+// on offline caching for a LEAP account. It acts on am-offline.xul items that
+// can be accessed in Thunderbird by choosing:
+//
+//   Edit -> Account Settings... -> Synchronization and Storage.
+function disableOfflineCaching()
+{
+  var disabled;
+  // for now, we consider a LEAP account every account whose incoming server
+  // has a hostname equal to IMAP_HOST and port equal to IMAP_PORT.
+  if (currentAccount.incomingServer.port == IMAP_PORT &&
+      currentAccount.incomingServer.hostName == IMAP_HOST)
+    disabled = true;
+  else
+    disabled = false;
+  // The "Keep messsages for this account on this computer" checkbox.
+  document.getElementById("offline.folders").disabled = disabled;
+  // The "Advanced..." button.
+  document.getElementById("selectImapFoldersButton").disabled = disabled;
+}
+
+
+// Clone 'am-offline.js' onPreInit() so we can store the current account.
+var oldOnPreInit = onPreInit.bind({});
+
+// Store current account and call old onPreInit().
+var onPreInit = function(account, accountValues)
+{
+  currentAccount = account;
+  oldOnPreInit(account, accountValues);
+}
+
+
+// Clone 'am-offline.js' onInit() so we can disable offline caching.
+var oldOnInit = onInit.bind({});
+
+// Call old onInit() and disable offline caching.
+var onInit = function(aPageId, aServerId)
+{
+  oldOnInit(aPageId, aServerId);
+  disableOfflineCaching();
+}
+