Add integration settings sections

Penumbra/Api/Api/PenumbraApi.cs

@@ -17,7 +17,7 @@ public class PenumbraApi(
     UiApi ui) : IDisposable, IApiService, IPenumbraApi
 {
     public const int BreakingVersion = 5;
-    public const int FeatureVersion  = 12;
+    public const int FeatureVersion  = 13;
 
     public void Dispose()
     {

Penumbra/Api/Api/UiApi.cs

@@ -5,20 +5,24 @@
 using Penumbra.Mods.Manager;
 using Penumbra.Services;
 using Penumbra.UI;
+using Penumbra.UI.Integration;
+using Penumbra.UI.Tabs;
 
 namespace Penumbra.Api.Api;
 
 public class UiApi : IPenumbraApiUi, IApiService, IDisposable
 {
-    private readonly CommunicatorService _communicator;
-    private readonly ConfigWindow        _configWindow;
-    private readonly ModManager          _modManager;
+    private readonly CommunicatorService         _communicator;
+    private readonly ConfigWindow                _configWindow;
+    private readonly ModManager                  _modManager;
+    private readonly IntegrationSettingsRegistry _integrationSettings;
 
-    public UiApi(CommunicatorService communicator, ConfigWindow configWindow, ModManager modManager)
+    public UiApi(CommunicatorService communicator, ConfigWindow configWindow, ModManager modManager, IntegrationSettingsRegistry integrationSettings)
     {
-        _communicator = communicator;
-        _configWindow = configWindow;
-        _modManager   = modManager;
+        _communicator        = communicator;
+        _configWindow        = configWindow;
+        _modManager          = modManager;
+        _integrationSettings = integrationSettings;
         _communicator.ChangedItemHover.Subscribe(OnChangedItemHover, ChangedItemHover.Priority.Default);
         _communicator.ChangedItemClick.Subscribe(OnChangedItemClick, ChangedItemClick.Priority.Default);
     }
@@ -98,4 +102,12 @@ private void OnChangedItemHover(IIdentifiedObjectData data)
         var (type, id) = data.ToApiObject();
         ChangedItemTooltip.Invoke(type, id);
     }
+
+    public PenumbraApiEc RegisterSettingsSection(Action draw)
+        => _integrationSettings.RegisterSection(draw);
+
+    public PenumbraApiEc UnregisterSettingsSection(Action draw)
+        => _integrationSettings.UnregisterSection(draw)
+            ? PenumbraApiEc.Success
+            : PenumbraApiEc.NothingChanged;
 }

Penumbra/Api/IpcProviders.cs

@@ -130,6 +130,8 @@ public IpcProviders(IDalamudPluginInterface pi, IPenumbraApi api, CharacterUtili
             IpcSubscribers.PostSettingsDraw.Provider(pi, api.Ui),
             IpcSubscribers.OpenMainWindow.Provider(pi, api.Ui),
             IpcSubscribers.CloseMainWindow.Provider(pi, api.Ui),
+            IpcSubscribers.RegisterSettingsSection.Provider(pi, api.Ui),
+            IpcSubscribers.UnregisterSettingsSection.Provider(pi, api.Ui),
         ];
         if (_characterUtility.Ready)
             _initializedProvider.Invoke();

Penumbra/UI/Integration/IntegrationSettingsRegistry.cs

@@ -0,0 +1,115 @@
+using Dalamud.Plugin;
+using OtterGui.Services;
+using OtterGui.Text;
+using Penumbra.Api.Enums;
+
+namespace Penumbra.UI.Integration;
+
+public sealed class IntegrationSettingsRegistry : IService, IDisposable
+{
+    private readonly IDalamudPluginInterface _pluginInterface;
+
+    private readonly List<(string InternalName, string Name, Action Draw)> _sections = [];
+
+    private bool _disposed = false;
+
+    public IntegrationSettingsRegistry(IDalamudPluginInterface pluginInterface)
+    {
+        _pluginInterface = pluginInterface;
+
+        _pluginInterface.ActivePluginsChanged += OnActivePluginsChanged;
+    }
+
+    public void Dispose()
+    {
+        _disposed = true;
+
+        _pluginInterface.ActivePluginsChanged -= OnActivePluginsChanged;
+
+        _sections.Clear();
+    }
+
+    public void Draw()
+    {
+        foreach (var (internalName, name, draw) in _sections)
+        {
+            if (!ImUtf8.CollapsingHeader($"Integration with {name}###IntegrationSettingsHeader.{internalName}"))
+                continue;
+
+            using var id = ImUtf8.PushId($"IntegrationSettings.{internalName}");
+            try
+            {
+                draw();
+            }
+            catch (Exception e)
+            {
+                Penumbra.Log.Error($"Error while drawing {internalName} integration settings: {e}");
+            }
+        }
+    }
+
+    public PenumbraApiEc RegisterSection(Action draw)
+    {
+        if (_disposed)
+            return PenumbraApiEc.SystemDisposed;
+
+        var plugin = GetPlugin(draw);
+        if (plugin is null)
+            return PenumbraApiEc.InvalidArgument;
+
+        var section = (plugin.InternalName, plugin.Name, draw);
+
+        var index = FindSectionIndex(plugin.InternalName);
+        if (index >= 0)
+        {
+            if (_sections[index] == section)
+                return PenumbraApiEc.NothingChanged;
+            _sections[index] = section;
+        }
+        else
+            _sections.Add(section);
+        _sections.Sort((lhs, rhs) => string.Compare(lhs.Name, rhs.Name, StringComparison.CurrentCultureIgnoreCase));
+
+        return PenumbraApiEc.Success;
+    }
+
+    public bool UnregisterSection(Action draw)
+    {
+        var index = FindSectionIndex(draw);
+        if (index < 0)
+            return false;
+
+        _sections.RemoveAt(index);
+        return true;
+    }
+
+    private void OnActivePluginsChanged(IActivePluginsChangedEventArgs args)
+    {
+        if (args.Kind is PluginListInvalidationKind.Loaded)
+            return;
+
+        foreach (var internalName in args.AffectedInternalNames)
+        {
+            var index = FindSectionIndex(internalName);
+            if (index >= 0 && GetPlugin(_sections[index].Draw) is null)
+            {
+                _sections.RemoveAt(index);
+                Penumbra.Log.Warning($"Removed stale integration setting section of {internalName} (reason: {args.Kind})");
+            }
+        }
+    }
+
+    private IExposedPlugin? GetPlugin(Delegate @delegate)
+        => @delegate.Method.DeclaringType
+            switch
+            {
+                null     => null,
+                var type => _pluginInterface.GetPlugin(type.Assembly),
+            };
+
+    private int FindSectionIndex(string internalName)
+        => _sections.FindIndex(section => section.InternalName.Equals(internalName, StringComparison.Ordinal));
+
+    private int FindSectionIndex(Action draw)
+        => _sections.FindIndex(section => section.Draw == draw);
+}

Penumbra/UI/Tabs/SettingsTab.cs

@@ -20,6 +20,7 @@
 using Penumbra.Mods.Manager;
 using Penumbra.Services;
 using Penumbra.UI.Classes;
+using Penumbra.UI.Integration;
 using Penumbra.UI.ModsTab;
 
 namespace Penumbra.UI.Tabs;
@@ -55,6 +56,7 @@ public ReadOnlySpan<byte> Label
     private readonly CleanupService              _cleanupService;
     private readonly AttributeHook               _attributeHook;
     private readonly PcpService                  _pcpService;
+    private readonly IntegrationSettingsRegistry _integrationSettings;
 
     private int _minimumX = int.MaxValue;
     private int _minimumY = int.MaxValue;
@@ -71,7 +73,7 @@ public SettingsTab(IDalamudPluginInterface pluginInterface, Configuration config
         DalamudSubstitutionProvider dalamudSubstitutionProvider, FileCompactor compactor, DalamudConfigService dalamudConfig,
         IDataManager gameData, PredefinedTagManager predefinedTagConfig, CrashHandlerService crashService,
         MigrationSectionDrawer migrationDrawer, CollectionAutoSelector autoSelector, CleanupService cleanupService,
-        AttributeHook attributeHook, PcpService pcpService)
+        AttributeHook attributeHook, PcpService pcpService, IntegrationSettingsRegistry integrationSettings)
     {
         _pluginInterface             = pluginInterface;
         _config                      = config;
@@ -99,6 +101,7 @@ public SettingsTab(IDalamudPluginInterface pluginInterface, Configuration config
         _cleanupService       = cleanupService;
         _attributeHook        = attributeHook;
         _pcpService           = pcpService;
+        _integrationSettings  = integrationSettings;
     }
 
     public void DrawHeader()
@@ -129,6 +132,7 @@ public void DrawContent()
         DrawColorSettings();
         DrawPredefinedTagsSection();
         DrawAdvancedSettings();
+        _integrationSettings.Draw();
         DrawSupportButtons();
     }
 
@@ -1133,7 +1137,7 @@ private void DrawWaitForPluginsReflection()
     }
 
     #endregion
-
+    
     /// <summary> Draw the support button group on the right-hand side of the window. </summary>
     private void DrawSupportButtons()
     {