Option to keep AddOffer window open

Patches/KeepOfferWindowOpenPatches.cs

@@ -0,0 +1,81 @@
+using Aki.Reflection.Patching;
+using EFT.UI.Ragfair;
+using HarmonyLib;
+using System.Reflection;
+using System.Threading.Tasks;
+
+namespace UIFixes
+{
+    public static class KeepOfferWindowOpenPatches
+    {
+        private static bool BlockClose = false;
+
+        public static void Enable()
+        {
+            new PlaceOfferClickPatch().Enable();
+            new ClosePatch().Enable();
+            new ManageTaskPatch().Enable();
+        }
+
+        public class PlaceOfferClickPatch : ModulePatch
+        {
+            protected override MethodBase GetTargetMethod()
+            {
+                return AccessTools.Method(typeof(AddOfferWindow), nameof(AddOfferWindow.method_1));
+            }
+
+            [PatchPrefix]
+            public static void Prefix()
+            {
+                BlockClose = Settings.KeepAddOfferOpen.Value;
+            }
+
+            [PatchPostfix]
+            public static void Postfix()
+            {
+                BlockClose = false;
+            }
+        }
+
+        public class ClosePatch : ModulePatch
+        {
+            protected override MethodBase GetTargetMethod()
+            {
+                return AccessTools.Method(typeof(AddOfferWindow), nameof(AddOfferWindow.Close));
+            }
+
+            [PatchPrefix]
+            public static bool Prefix()
+            {
+                return !BlockClose;
+            }
+        }
+
+        // The window has a task completion source that completes when closing window or upon successful offer placement (which assumes window closes too)
+        // Replace implementation to ensure it only completes when window is closed, or placement is successful AND window has since closed
+        public class ManageTaskPatch : ModulePatch
+        {
+            protected override MethodBase GetTargetMethod()
+            {
+                return AccessTools.Method(typeof(AddOfferWindow), nameof(AddOfferWindow.method_16));
+            }
+
+            [PatchPrefix]
+            public static bool Prefix(AddOfferWindow __instance, TaskCompletionSource<object> ___taskCompletionSource_0, ref bool ___bool_2)
+            {
+                if (!Settings.KeepAddOfferOpen.Value)
+                {
+                    return true;
+                }
+
+                ___bool_2 = false;
+                if (!__instance.gameObject.activeInHierarchy)
+                {
+                    ___taskCompletionSource_0.SetResult(null);
+                }
+
+                return false;
+            }
+        }
+    }
+}

Plugin.cs

@@ -30,6 +30,7 @@ namespace UIFixes
             new MoveTaskbarPatch().Enable();
             FixFleaPatches.Enable();
             FleaPrevSearchPatches.Enable();
+            KeepOfferWindowOpenPatches.Enable();
         }
     }
 }

Settings.cs

@@ -59,6 +59,7 @@ namespace UIFixes
         public static ConfigEntry<bool> EnableFleaHistory { get; set; }
         public static ConfigEntry<bool> ShowRequiredQuest { get; set; }
         public static ConfigEntry<bool> AutoExpandCategories { get; set; }
+        public static ConfigEntry<bool> KeepAddOfferOpen { get; set; }
 
         // Advanced
         public static ConfigEntry<bool> StyleItemPanel { get; set; }
@@ -244,6 +245,15 @@ namespace UIFixes
                     null,
                     new ConfigurationManagerAttributes { })));
 
+            configEntries.Add(KeepAddOfferOpen = config.Bind(
+                FleaMarketSection,
+                "Keep Add Offer Window Open",
+                false,
+                new ConfigDescription(
+                    "Don't close the Add Offer window after you place an offer",
+                    null,
+                    new ConfigurationManagerAttributes { })));
+
             // Advanced
             configEntries.Add(StyleItemPanel = config.Bind(
                 AdvancedSection,