Enable nullability in Content.Client (#3257)

* Enable nullability in Content.Client

* Remove #nullable enable

* Merge fixes

* Remove Debug.Assert

* Merge fixes

* Fix build

* Fix build

Content.Client/Research/LatheMenu.cs

@@ -7,7 +7,6 @@ using Robust.Client.UserInterface.Controls;
 using Robust.Client.UserInterface.CustomControls;
 using Robust.Client.Utility;
 using Robust.Shared.IoC;
-using Robust.Shared.Maths;
 using Robust.Shared.Prototypes;
 
 namespace Content.Client.Research
@@ -24,11 +23,11 @@ namespace Content.Client.Research
         public Button ServerConnectButton;
         public Button ServerSyncButton;
 
-        public LatheBoundUserInterface Owner { get; set; }
+        public LatheBoundUserInterface Owner { get; }
 
         private readonly List<LatheRecipePrototype> _shownRecipes = new();
 
-        public LatheMenu(LatheBoundUserInterface owner = null)
+        public LatheMenu(LatheBoundUserInterface owner)
         {
             SetSize = MinSize = (300, 450);
             IoCManager.InjectDependencies(this);
@@ -126,7 +125,7 @@ namespace Content.Client.Research
             };
 
             hBoxButtons.AddChild(spacer);
-            if (Owner?.Database is ProtolatheDatabaseComponent database)
+            if (Owner.Database is ProtolatheDatabaseComponent database)
             {
                 hBoxButtons.AddChild(ServerConnectButton);
                 hBoxButtons.AddChild(ServerSyncButton);
@@ -157,9 +156,11 @@ namespace Content.Client.Research
         {
             _materials.Clear();
 
+            if (Owner.Storage == null) return;
+
             foreach (var (id, amount) in Owner.Storage)
             {
-                if (!_prototypeManager.TryIndex(id, out MaterialPrototype materialPrototype)) continue;
+                if (!_prototypeManager.TryIndex(id, out MaterialPrototype? materialPrototype)) continue;
                 var material = materialPrototype;
                 _materials.AddItem($"{material.Name} {amount} cm³", material.Icon.Frame0(), false);
             }
@@ -175,7 +176,7 @@ namespace Content.Client.Research
             for (var i = 0; i < _shownRecipes.Count; i++)
             {
                 var prototype = _shownRecipes[i];
-                _items[i].Disabled = !Owner.Lathe.CanProduce(prototype, quantity);
+                _items[i].Disabled = !Owner.Lathe?.CanProduce(prototype, quantity) ?? true;
             }
         }
 
@@ -206,6 +207,8 @@ namespace Content.Client.Research
         {
             _shownRecipes.Clear();
 
+            if (Owner.Database == null) return;
+
             foreach (var prototype in Owner.Database)
             {
                 if (_searchBar.Text.Trim().Length != 0)

Content.Client/Research/LatheQueueMenu.cs

@@ -19,8 +19,9 @@ namespace Content.Client.Research
         private readonly Label _description;
         private readonly TextureRect _icon;
 
-        public LatheQueueMenu()
+        public LatheQueueMenu(LatheBoundUserInterface owner)
         {
+            Owner = owner;
             SetSize = MinSize = (300, 450);
             Title = Loc.GetString("Lathe Queue");
 

Content.Client/Research/ResearchConsoleMenu.cs

@@ -7,14 +7,13 @@ using Robust.Client.UserInterface.CustomControls;
 using Robust.Client.Utility;
 using Robust.Shared.IoC;
 using Robust.Shared.Localization;
-using Robust.Shared.Maths;
 using Robust.Shared.Prototypes;
 
 namespace Content.Client.Research
 {
     public class ResearchConsoleMenu : SS14Window
     {
-        public ResearchConsoleBoundUserInterface Owner { get; set; }
+        public ResearchConsoleBoundUserInterface Owner { get; }
 
         private readonly List<TechnologyPrototype> _unlockedTechnologyPrototypes = new();
         private readonly List<TechnologyPrototype> _unlockableTechnologyPrototypes = new();
@@ -34,9 +33,9 @@ namespace Content.Client.Research
         public Button ServerSelectionButton { get; private set; }
         public Button ServerSyncButton { get; private set; }
 
-        public TechnologyPrototype TechnologySelected;
+        public TechnologyPrototype? TechnologySelected;
 
-        public ResearchConsoleMenu(ResearchConsoleBoundUserInterface owner = null)
+        public ResearchConsoleMenu(ResearchConsoleBoundUserInterface owner)
         {
             SetSize = MinSize = (800, 400);
 
@@ -274,7 +273,7 @@ namespace Content.Client.Research
             for (var i = 0; i < TechnologySelected.RequiredTechnologies.Count; i++)
             {
                 var requiredId = TechnologySelected.RequiredTechnologies[i];
-                if (!prototypeMan.TryIndex(requiredId, out TechnologyPrototype prototype)) continue;
+                if (!prototypeMan.TryIndex(requiredId, out TechnologyPrototype? prototype)) continue;
                 if (i == 0)
                     _technologyRequirements.Text = Loc.GetString("Requires") + $": {prototype.Name}";
                 else