feat: add automatic UI hiding to GameGui, UiBuilder

Dalamud/Dalamud.cs

@@ -378,6 +378,9 @@ namespace Dalamud {
                 }
             }
 
+            if (this.Framework.Gui.GameUiHidden)
+                return;
+
             if (this.isImguiDrawLogWindow)
             {
                 this.isImguiDrawLogWindow = this.logWindow != null && this.logWindow.Draw();

Dalamud/Game/Internal/Gui/GameGui.cs

@@ -44,6 +44,17 @@ namespace Dalamud.Game.Internal.Gui {
             float *camPos, float *clipPos, float rayDistance, float *worldPos, int *unknown);
         private readonly ScreenToWorldNativeDelegate screenToWorldNative;
 
+        [UnmanagedFunctionPointer(CallingConvention.ThisCall)]
+        private delegate IntPtr ToggleUiHideDelegate(IntPtr thisPtr, byte unknownByte);
+        private readonly Hook<ToggleUiHideDelegate> toggleUiHideHook;
+
+        public bool GameUiHidden { get; private set; }
+
+        /// <summary>
+        /// Event which is fired when the game UI hiding is toggled.
+        /// </summary>
+        public event EventHandler<bool> OnUiHideToggled; 
+
         /// <summary>
         /// The item ID that is currently hovered by the player. 0 when no item is hovered.
         /// If > 1.000.000, subtract 1.000.000 and treat it as HQ
@@ -90,6 +101,8 @@ namespace Dalamud.Game.Internal.Gui {
 
             this.screenToWorldNative =
                 Marshal.GetDelegateForFunctionPointer<ScreenToWorldNativeDelegate>(Address.ScreenToWorld);
+
+            this.toggleUiHideHook = new Hook<ToggleUiHideDelegate>(Address.ToggleUiHide, new ToggleUiHideDelegate(ToggleUiHideDetour), this);
         }
 
         private IntPtr HandleSetGlobalBgmDetour(UInt16 bgmKey, byte a2, UInt32 a3, UInt32 a4, UInt32 a5, byte a6) {
@@ -279,6 +292,20 @@ namespace Dalamud.Game.Internal.Gui {
             return isSuccess;
         }
 
+        private IntPtr ToggleUiHideDetour(IntPtr thisPtr, byte unknownByte) {
+            GameUiHidden = !GameUiHidden;
+
+            try {
+                OnUiHideToggled?.Invoke(this, GameUiHidden);
+            } catch (Exception ex) {
+                Log.Error(ex, "Error on OnUiHideToggled event dispatch");
+            }
+            
+            Log.Debug("UiHide toggled: {0}", GameUiHidden);
+
+            return this.toggleUiHideHook.Original(thisPtr, unknownByte);
+        }
+
         public void SetBgm(ushort bgmKey) => this.setGlobalBgmHook.Original(bgmKey, 0, 0, 0, 0, 0); 
 
         public void Enable() {
@@ -286,6 +313,7 @@ namespace Dalamud.Game.Internal.Gui {
             this.setGlobalBgmHook.Enable();
             this.handleItemHoverHook.Enable();
             this.handleItemOutHook.Enable();
+            this.toggleUiHideHook.Enable();
         }
 
         public void Dispose() {
@@ -293,6 +321,7 @@ namespace Dalamud.Game.Internal.Gui {
             this.setGlobalBgmHook.Dispose();
             this.handleItemHoverHook.Dispose();
             this.handleItemOutHook.Dispose();
+            this.toggleUiHideHook.Dispose();
         }
     }
 }

Dalamud/Game/Internal/Gui/GameGuiAddressResolver.cs

@@ -3,7 +3,7 @@ using System.Runtime.InteropServices;
 using Serilog;
 
 namespace Dalamud.Game.Internal.Gui {
-    public sealed class GameGuiAddressResolver : BaseAddressResolver {
+    internal sealed class GameGuiAddressResolver : BaseAddressResolver {
         public IntPtr BaseAddress { get; private set; }
         
         public IntPtr ChatManager { get; private set; }
@@ -14,6 +14,7 @@ namespace Dalamud.Game.Internal.Gui {
         public IntPtr GetUIObject { get; private set; }
         public IntPtr GetMatrixSingleton { get; private set; }
         public IntPtr ScreenToWorld { get; private set; }
+        public IntPtr ToggleUiHide { get; set; }
 
         public GameGuiAddressResolver(IntPtr baseAddress) {
             BaseAddress = baseAddress;
@@ -35,6 +36,7 @@ namespace Dalamud.Game.Internal.Gui {
             GetUIObject = sig.ScanText("E8 ?? ?? ?? ?? 48 8B C8 48 8B 10 FF 52 40 80 88 ?? ?? ?? ?? 01 E9");
             GetMatrixSingleton = sig.ScanText("E8 ?? ?? ?? ?? 48 8D 4C 24 ?? 48 89 4c 24 ?? 4C 8D 4D ?? 4C 8D 44 24 ??");
             ScreenToWorld = sig.ScanText("48 83 EC 48 48 8B 05 ?? ?? ?? ?? 4D 8B D1");
+            ToggleUiHide = sig.ScanText("48 89 5C 24 ?? 48 89 74 24 ?? 57 48 83 EC 20 0F B6 B9 ?? ?? ?? ?? B8 ?? ?? ?? ??");
         }
     }
 }

Dalamud/Interface/UiBuilder.cs

@@ -3,9 +3,11 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using Dalamud.Game.Internal.Gui;
 using ImGuiNET;
 using ImGuiScene;
 using Serilog;
+using SharpDX.Direct3D11;
 
 namespace Dalamud.Interface
 {
@@ -31,8 +33,14 @@ namespace Dalamud.Interface
         /// </summary>
         public event RawDX11Scene.BuildUIDelegate OnBuildUi;
 
+        /// <summary>
+        /// Choose if this plugin should hide its UI automatically when the whole game hides its UI.
+        /// </summary>
+        public bool DisableAutomaticUiHide { get; set; } = false;
+
         private readonly InterfaceManager interfaceManager;
-        #if DEBUG
+        private readonly GameGui gameGui;
+#if DEBUG
         internal static bool DoStats { get; set; } = true;
         #else
         internal static bool DoStats { get; set; } = false;
@@ -47,10 +55,11 @@ namespace Dalamud.Interface
         /// </summary>
         /// <param name="interfaceManager">The interface manager to register on.</param>
         /// <param name="namespaceName">The plugin namespace.</param>
-        internal UiBuilder(InterfaceManager interfaceManager, string namespaceName) {
+        internal UiBuilder(InterfaceManager interfaceManager, GameGui gameGui, string namespaceName) {
             this.namespaceName = namespaceName;
 
             this.interfaceManager = interfaceManager;
+            this.gameGui = gameGui;
             this.interfaceManager.OnDraw += OnDraw;
             this.stopwatch = new System.Diagnostics.Stopwatch();
         }
@@ -118,6 +127,10 @@ namespace Dalamud.Interface
         private bool hasErrorWindow;
 
         private void OnDraw() {
+
+            if (this.gameGui.GameUiHidden && !DisableAutomaticUiHide)
+                return;
+
             ImGui.PushID(this.namespaceName);
             if (DoStats) {
                 this.stopwatch.Restart();

Dalamud/Plugin/DalamudPluginInterface.cs

@@ -75,7 +75,7 @@ namespace Dalamud.Plugin
             this.CommandManager = dalamud.CommandManager;
             this.Framework = dalamud.Framework;
             this.ClientState = dalamud.ClientState;
-            this.UiBuilder = new UiBuilder(dalamud.InterfaceManager, pluginName);
+            this.UiBuilder = new UiBuilder(dalamud.InterfaceManager, dalamud.Framework.Gui, pluginName);
             this.TargetModuleScanner = dalamud.SigScanner;
             this.Data = dalamud.Data;
             this.SeStringManager = dalamud.SeStringManager;