Merge more UI refactor stuff (#11277)

* Changelog+options ui controller
* Sandbox UI controller
* Escape menu UI controller

Content.Client/UserInterface/Systems/DecalPlacer/DecalPlacerUIController.cs

@@ -0,0 +1,84 @@
+using Content.Client.Decals.UI;
+using Content.Client.Gameplay;
+using Content.Client.Sandbox;
+using Content.Shared.Decals;
+using Robust.Client.UserInterface;
+using Robust.Client.UserInterface.Controllers;
+using Robust.Client.UserInterface.Controls;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Utility;
+
+namespace Content.Client.UserInterface.Systems.DecalPlacer;
+
+public sealed class DecalPlacerUIController : UIController, IOnStateExited<GameplayState>, IOnSystemChanged<SandboxSystem>
+{
+    [Dependency] private readonly IPrototypeManager _prototypes = default!;
+    [UISystemDependency] private readonly SandboxSystem _sandbox = default!;
+
+    private DecalPlacerWindow? _window;
+
+    public void ToggleWindow()
+    {
+        EnsureWindow();
+
+        if (_window!.IsOpen)
+        {
+            _window.Close();
+        }
+        else if(_sandbox.SandboxAllowed)
+        {
+            _window.Open();
+        }
+    }
+
+    public void OnStateExited(GameplayState state)
+    {
+        if (_window == null)
+            return;
+        _window.Dispose();
+        _window = null;
+    }
+
+    public void OnSystemLoaded(SandboxSystem system)
+    {
+        _sandbox.SandboxDisabled += CloseWindow;
+        _prototypes.PrototypesReloaded += OnPrototypesReloaded;
+    }
+
+    public void OnSystemUnloaded(SandboxSystem system)
+    {
+        _sandbox.SandboxDisabled -= CloseWindow;
+        _prototypes.PrototypesReloaded -= OnPrototypesReloaded;
+    }
+
+    private void OnPrototypesReloaded(PrototypesReloadedEventArgs obj)
+    {
+        ReloadPrototypes();
+    }
+
+    private void ReloadPrototypes()
+    {
+        if (_window == null || _window.Disposed)
+            return;
+
+        var prototypes = _prototypes.EnumeratePrototypes<DecalPrototype>();
+        _window.Populate(prototypes);
+    }
+
+    private void EnsureWindow()
+    {
+        if (_window is { Disposed: false })
+            return;
+        _window = UIManager.CreateWindow<DecalPlacerWindow>();
+        LayoutContainer.SetAnchorPreset(_window, LayoutContainer.LayoutPreset.CenterLeft);
+        ReloadPrototypes();
+    }
+
+    private void CloseWindow()
+    {
+        if (_window == null || _window.Disposed)
+            return;
+
+        _window.Close();
+    }
+}