Add EscapeContext keybind (#15301)

* Add EscapeContext

Escape context input closes windows if there are any open. If there are not any windows it opens the game menu.

* Add fluent for Escape Context

* Move EngineContext keybind to content

* Readd WindowCloseAll

* Fix EscapeContext not opening the game menu after using WindowCloseAll

WindowCloseAll does not clear the CloseRecentWindowUIController.recentlyInteractedWindows, which caused HasClosableWindow to return true because the list still had items.

Changed HasClosableWindow to check if windows in the list are still open and clear them if they aren't.

* Clean up EscapeContextUIController

Content.Client/UserInterface/Systems/CloseWindow/CloseRecentWindowUIController.cs

@@ -32,7 +32,10 @@ public sealed class CloseRecentWindowUIController : UIController
             InputCmdHandler.FromDelegate(session => CloseMostRecentWindow()));
     }
 
-    private void CloseMostRecentWindow()
+    /// <summary>
+    /// Closes the most recently focused window.
+    /// </summary>
+    public void CloseMostRecentWindow()
     {
         // Search backwards through the recency list to find a still open window and close it
         for (int i=recentlyInteractedWindows.Count-1; i>=0; i--)
@@ -118,5 +121,23 @@ public sealed class CloseRecentWindowUIController : UIController
             SetMostRecentlyInteractedWindow((BaseWindow) control);
         }
     }
-}
 
+    /// <summary>
+    /// Checks whether there are any windows that can be closed.
+    /// </summary>
+    /// <returns></returns>
+    public bool HasClosableWindow()
+    {
+        for (var i = recentlyInteractedWindows.Count - 1; i >= 0; i--)
+        {
+            var window = recentlyInteractedWindows[i];
+            if (window.IsOpen)
+                return true;
+
+            recentlyInteractedWindows.RemoveAt(i);
+            // continue going down the list, hoping to find a still-open window
+        }
+
+        return false;
+    }
+}

Content.Client/UserInterface/Systems/EscapeMenu/EscapeContextUIController.cs

@@ -0,0 +1,37 @@
+using Content.Client.UserInterface.Systems.Info;
+using Content.Shared.Input;
+using JetBrains.Annotations;
+using Robust.Client.Input;
+using Robust.Client.UserInterface;
+using Robust.Client.UserInterface.Controllers;
+using Robust.Shared.Input;
+using Robust.Shared.Input.Binding;
+
+namespace Content.Client.UserInterface.Systems.EscapeMenu;
+
+[UsedImplicitly]
+public sealed class EscapeContextUIController : UIController
+{
+    [Dependency] private readonly IInputManager _inputManager = default!;
+
+    [Dependency] private readonly CloseRecentWindowUIController _closeRecentWindowUIController = default!;
+    [Dependency] private readonly EscapeUIController _escapeUIController = default!;
+
+    public override void Initialize()
+    {
+        _inputManager.SetInputCommand(ContentKeyFunctions.EscapeContext,
+            InputCmdHandler.FromDelegate(_ => CloseWindowOrOpenGameMenu()));
+    }
+
+    private void CloseWindowOrOpenGameMenu()
+    {
+        if (_closeRecentWindowUIController.HasClosableWindow())
+        {
+            _closeRecentWindowUIController.CloseMostRecentWindow();
+        }
+        else
+        {
+            _escapeUIController.ToggleWindow();
+        }
+    }
+}

Content.Client/UserInterface/Systems/EscapeMenu/EscapeUIController.cs

@@ -133,7 +133,10 @@ public sealed class EscapeUIController : UIController, IOnStateEntered<GameplayS
         _escapeWindow?.Close();
     }
 
-    private void ToggleWindow()
+    /// <summary>
+    /// Toggles the game menu.
+    /// </summary>
+    public void ToggleWindow()
     {
         if (_escapeWindow == null)
             return;