Added option to disable item event hooking

src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/Feature.cs

@@ -194,14 +194,11 @@ namespace Acacia.Features
 
         #region Event helpers
 
-        private static MailEvents _mailEvents;
         protected static MailEvents MailEvents
         {
             get
             {
-                if (_mailEvents == null)
+                return ThisAddIn.Instance.MailEvents;
-                    _mailEvents = new MailEvents(ThisAddIn.Instance);
-                return _mailEvents;
             }
         }
         

src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/GAB/FeatureGAB.cs

@@ -64,7 +64,7 @@ namespace Acacia.Features.GAB
 
         public override void Startup()
         {
-            if (SuppressModifications)
+            if (SuppressModifications && MailEvents != null)
             {
                 MailEvents.BeforeDelete += SuppressEventHandler_Delete;
                 MailEvents.Write += SuppressEventHandler_Modify;

src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/ReplyFlags/FeatureReplyFlags.cs

@@ -47,17 +47,23 @@ namespace Acacia.Features.ReplyFlags
             if (ReadEvent)
             {
                 // As a fallback, add an event handler to update the message when displaying it
+                if (MailEvents != null)
+                {
                     MailEvents.Read += UpdateReplyStatus;
                 }
+            }
 
             if (SendEvents)
             {
                 // Hook reply and send events to update local state to server
+                if (MailEvents != null)
+                {
                     MailEvents.Reply += OnReply;
                     MailEvents.ReplyAll += OnReplyAll;
                     MailEvents.Forward += OnForwarded;
                 }
             }
+        }
 
         override public void GetCapabilities(ZPushCapabilities caps)
         {

src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SendAs/FeatureSendAs.cs

@@ -48,19 +48,25 @@ namespace Acacia.Features.SendAs
         private static readonly BoolOption OPTION_SEND_AS_OWNER = new BoolOption("SendAsOwner", true);
 
         public override void Startup()
+        {
+            if (MailEvents != null)
             {
                 MailEvents.ItemSend += MailEvents_ItemSend;
+            }
 
             if (SendAsOwner)
             {
                 // Need shared folders for automatic sender selection
                 _sharedFolders = ThisAddIn.Instance.GetFeature<FeatureSharedFolders>();
                 if (_sharedFolders != null)
+                {
+                    if (MailEvents != null)
                     {
                         MailEvents.Respond += MailEvents_Respond;
                     }
                 }
             }
+        }
 
         private void MailEvents_Respond(IMailItem mail, IMailItem response)
         {

src/AcaciaZPushPlugin/AcaciaZPushPlugin/GlobalOptions.cs

@@ -118,6 +118,15 @@ namespace Acacia
             }
         }
 
+        [AcaciaOption("Enables or disables item event hooking." +
+                      "Note that if this is disabled, several features may not work correctly.")]
+        virtual public bool HookItemEvents
+        {
+            get { return GetOption(null, HOOK_ITEM_EVENTS); }
+            set { SetOption(null, HOOK_ITEM_EVENTS, value); }
+        }
+        private static readonly BoolOption HOOK_ITEM_EVENTS = new BoolOption("HookItemEvents", true);
+
         #region UI Options
 
         [AcaciaOption("Completely enables or disables modifications to the Outlook UI." +

src/AcaciaZPushPlugin/AcaciaZPushPlugin/Stubs/IAddIn.cs

@@ -1,5 +1,6 @@
 using Acacia.Features;
 using Acacia.UI.Outlook;
+using Acacia.Utils;
 using Acacia.ZPush;
 using System;
 using System.Collections.Generic;
@@ -16,6 +17,7 @@ namespace Acacia.Stubs
         NSOutlook.Application RawApp { get; } // TODO: remove
 
         ZPushWatcher Watcher { get; }
+        MailEvents MailEvents { get; }
         IEnumerable<Feature> Features { get; }
         IEnumerable<KeyValuePair<string,string>> COMAddIns { get; }
         string Version { get; }

src/AcaciaZPushPlugin/AcaciaZPushPlugin/Stubs/OutlookWrappers/AddInWrapper.cs

@@ -85,6 +85,7 @@ namespace Acacia.Stubs.OutlookWrappers
         public OutlookUI OutlookUI { get { return _thisAddIn.OutlookUI; } }
 
         public ZPushWatcher Watcher { get { return _thisAddIn.Watcher; } }
+        public MailEvents MailEvents { get { return _thisAddIn.MailEvents; } }
         public IEnumerable<Feature> Features { get { return _thisAddIn.Features; } }
         public IEnumerable<KeyValuePair<string, string>> COMAddIns
         {

src/AcaciaZPushPlugin/AcaciaZPushPlugin/ThisAddIn.cs

@@ -63,6 +63,22 @@ namespace Acacia
             private set;
         }
 
+        private MailEvents _mailEvents;
+        public MailEvents MailEvents
+        {
+            get
+            {
+                if (_mailEvents == null)
+                {
+                    if (GlobalOptions.INSTANCE.HookItemEvents)
+                    {
+                        _mailEvents = new MailEvents(Instance);
+                    }
+                }
+                return _mailEvents;
+            }
+        }
+
         #region Startup / Shutdown
 
         private void ThisAddIn_Startup(object sender, System.EventArgs args)