Add start of mod merger.

Penumbra/Communication/ModPathChanged.cs

@@ -37,13 +37,14 @@ public sealed class ModPathChanged : EventWrapper<Action<ModPathChangeType, Mod,
         /// <seealso cref="Mods.Manager.ModManager.OnModPathChange"/>
         ModManager = 0,
 
+        /// <seealso cref="Mods.Editor.ModMerger.OnModPathChange"/>
+        ModMerger = 0,
+
         /// <seealso cref="Collections.Manager.CollectionStorage.OnModPathChange"/>
         CollectionStorage = 10,
 
         /// <seealso cref="Collections.Cache.CollectionCacheManager.OnModChangeRemoval"/>
         CollectionCacheManagerRemoval = 100,
-
-
     }
     public ModPathChanged()
         : base(nameof(ModPathChanged))

Penumbra/Mods/Editor/DuplicateManager.cs

@@ -8,21 +8,18 @@ using System.Threading.Tasks;
 using Penumbra.Mods.Manager;
 using Penumbra.Services;
 using Penumbra.String.Classes;
-using Penumbra.Util;
 
-namespace Penumbra.Mods;
+namespace Penumbra.Mods.Editor;
 
 public class DuplicateManager
 {
     private readonly SaveService                                      _saveService;
     private readonly ModManager                                       _modManager;
     private readonly SHA256                                           _hasher = SHA256.Create();
-    private readonly ModFileCollection                                _files;
     private readonly List<(FullPath[] Paths, long Size, byte[] Hash)> _duplicates = new();
 
-    public DuplicateManager(ModFileCollection files, ModManager modManager, SaveService saveService)
+    public DuplicateManager(ModManager modManager, SaveService saveService)
     {
-        _files            = files;
         _modManager  = modManager;
         _saveService = saveService;
     }
@@ -43,7 +40,7 @@ public class DuplicateManager
         Task.Run(() => CheckDuplicates(filesTmp));
     }
 
-    public void DeleteDuplicates(Mod mod, ISubMod option, bool useModManager)
+    public void DeleteDuplicates(ModFileCollection files, Mod mod, ISubMod option, bool useModManager)
     {
         if (!Finished || _duplicates.Count == 0)
             return;
@@ -60,7 +57,7 @@ public class DuplicateManager
 
         _duplicates.Clear();
         DeleteEmptyDirectories(mod.ModPath);
-        _files.UpdateAll(mod, option);
+        files.UpdateAll(mod, option);
     }
 
     public void Clear()
@@ -248,9 +245,10 @@ public class DuplicateManager
             _modManager.Creator.ReloadMod(mod, true, out _);
 
             Finished = false;
-            _files.UpdateAll(mod, mod.Default);
+            var files = new ModFileCollection();
-            CheckDuplicates(_files.Available.OrderByDescending(f => f.FileSize).ToArray());
+            files.UpdateAll(mod, mod.Default);
-            DeleteDuplicates(mod, mod.Default, false);
+            CheckDuplicates(files.Available.OrderByDescending(f => f.FileSize).ToArray());
+            DeleteDuplicates(files, mod, mod.Default, false);
         }
         catch (Exception e)
         {

Penumbra/Mods/Editor/MdlMaterialEditor.cs

@@ -7,6 +7,7 @@ using System.Text.RegularExpressions;
 using OtterGui;
 using Penumbra.GameData.Enums;
 using Penumbra.GameData.Files;
+using Penumbra.Mods.Editor;
 
 namespace Penumbra.Mods;
 

Penumbra/Mods/Editor/ModEditor.cs

@@ -1,6 +1,7 @@
 using System;
 using System.IO;
 using OtterGui;
+using Penumbra.Mods.Editor;
 
 namespace Penumbra.Mods;
 

Penumbra/Mods/Editor/ModFileCollection.cs

@@ -3,11 +3,10 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Threading;
-using Microsoft.Win32;
 using OtterGui;
 using Penumbra.String.Classes;
 
-namespace Penumbra.Mods;
+namespace Penumbra.Mods.Editor;
 
 public class ModFileCollection : IDisposable
 {

Penumbra/Mods/Editor/ModFileEditor.cs

@@ -2,6 +2,7 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using Penumbra.Mods.Editor;
 using Penumbra.Mods.Manager;
 using Penumbra.String.Classes;
 

Penumbra/Mods/Editor/ModMerger.cs

@@ -0,0 +1,361 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using Dalamud.Interface.Internal.Notifications;
+using Dalamud.Utility;
+using OtterGui;
+using Penumbra.Api.Enums;
+using Penumbra.Communication;
+using Penumbra.Mods.Manager;
+using Penumbra.Services;
+using Penumbra.String.Classes;
+using Penumbra.UI.ModsTab;
+
+namespace Penumbra.Mods.Editor;
+
+public class ModMerger : IDisposable
+{
+    private readonly CommunicatorService   _communicator;
+    private readonly ModOptionEditor       _editor;
+    private readonly ModFileSystemSelector _selector;
+    private readonly DuplicateManager      _duplicates;
+    private readonly ModManager            _mods;
+    private readonly ModCreator            _creator;
+
+    public Mod?   MergeFromMod { get; private set; }
+    public Mod?   MergeToMod;
+    public string OptionGroupName = "Merges";
+    public string OptionName      = string.Empty;
+
+
+    private readonly Dictionary<string, string> _fileToFile         = new();
+    private readonly HashSet<string>            _createdDirectories = new();
+    public readonly  HashSet<SubMod>            SelectedOptions     = new();
+
+    private int        _createdGroup = -1;
+    private SubMod?    _createdOption;
+    public  Exception? Error { get; private set; }
+
+    public ModMerger(ModManager mods, ModOptionEditor editor, ModFileSystemSelector selector, DuplicateManager duplicates,
+        CommunicatorService communicator, ModCreator creator)
+    {
+        _editor                    =  editor;
+        _selector                  =  selector;
+        _duplicates                =  duplicates;
+        _communicator              =  communicator;
+        _creator                   =  creator;
+        _mods                      =  mods;
+        _selector.SelectionChanged += OnSelectionChange;
+        _communicator.ModPathChanged.Subscribe(OnModPathChange, ModPathChanged.Priority.Api);
+    }
+
+    public void Dispose()
+    {
+        _selector.SelectionChanged -= OnSelectionChange;
+        _communicator.ModPathChanged.Unsubscribe(OnModPathChange);
+    }
+
+    public IEnumerable<Mod> ModsWithoutCurrent
+        => _mods.Where(m => m != MergeFromMod);
+
+    public bool CanMerge
+        => MergeToMod != null && MergeToMod != MergeFromMod && !MergeFromMod!.HasOptions;
+
+    public void Merge()
+    {
+        if (MergeFromMod == null || MergeToMod == null || MergeFromMod == MergeToMod)
+            return;
+
+        try
+        {
+            Error = null;
+            DataCleanup();
+            if (MergeFromMod.HasOptions)
+                MergeWithOptions();
+            else
+                MergeIntoOption(OptionGroupName, OptionName);
+            _duplicates.DeduplicateMod(MergeToMod.ModPath);
+        }
+        catch (Exception ex)
+        {
+            Error = ex;
+            Penumbra.ChatService.NotificationMessage(
+                $"Could not merge {MergeFromMod!.Name} into {MergeToMod!.Name}, cleaning up changes.:\n{ex}", "Failure",
+                NotificationType.Error);
+            FailureCleanup();
+            DataCleanup();
+        }
+    }
+
+    private void MergeWithOptions()
+    {
+        // Not supported
+    }
+
+    private void MergeIntoOption(string groupName, string optionName)
+    {
+        if (groupName.Length == 0 && optionName.Length == 0)
+        {
+            CopyFiles(MergeToMod!.ModPath);
+            MergeIntoOption(MergeFromMod!.AllSubMods.Reverse(), MergeToMod!.Default);
+        }
+        else if (groupName.Length * optionName.Length == 0)
+        {
+            return;
+        }
+
+        var (group, groupIdx, groupCreated) = _editor.FindOrAddModGroup(MergeToMod!, GroupType.Multi, groupName);
+        if (groupCreated)
+            _createdGroup = groupIdx;
+        var (option, optionCreated) = _editor.FindOrAddOption(MergeToMod!, groupIdx, optionName);
+        if (optionCreated)
+            _createdOption = option;
+        var dir = ModCreator.NewOptionDirectory(MergeToMod!.ModPath, groupName);
+        if (!dir.Exists)
+            _createdDirectories.Add(dir.FullName);
+        dir = ModCreator.NewOptionDirectory(dir, optionName);
+        if (!dir.Exists)
+            _createdDirectories.Add(dir.FullName);
+        CopyFiles(dir);
+        MergeIntoOption(MergeFromMod!.AllSubMods.Reverse(), option);
+    }
+
+    private void MergeIntoOption(IEnumerable<SubMod> mergeOptions, SubMod option)
+    {
+        var redirections = option.FileData.ToDictionary(kvp => kvp.Key, kvp => kvp.Value);
+        var swaps        = option.FileSwapData.ToDictionary(kvp => kvp.Key, kvp => kvp.Value);
+        var manips       = option.ManipulationData.ToHashSet();
+        foreach (var originalOption in mergeOptions)
+        {
+            foreach (var manip in originalOption.Manipulations)
+            {
+                if (!manips.Add(manip))
+                    throw new Exception(
+                        $"Could not add meta manipulation {manip} from {originalOption.FullName} to {option.FullName} because another manipulation of the same data already exists in this option.");
+            }
+
+            foreach (var (swapA, swapB) in originalOption.FileSwaps)
+            {
+                if (!swaps.TryAdd(swapA, swapB))
+                    throw new Exception(
+                        $"Could not add file swap {swapB} -> {swapA} from {originalOption.FullName} to {option.FullName} because another swap of the key already exists.");
+            }
+
+            foreach (var (gamePath, relPath) in originalOption.Files)
+            {
+                if (!_fileToFile.TryGetValue(relPath.FullName, out var newFile))
+                    throw new Exception(
+                        $"Could not add file redirection {relPath} -> {gamePath} from {originalOption.FullName} to {option.FullName} because the file does not exist in the new mod.");
+                if (!redirections.TryAdd(gamePath, new FullPath(newFile)))
+                    throw new Exception(
+                        $"Could not add file redirection {relPath} -> {gamePath} from {originalOption.FullName} to {option.FullName} because a redirection for the game path already exists.");
+            }
+        }
+
+        _editor.OptionSetFiles(MergeToMod!, option.GroupIdx, option.OptionIdx, redirections);
+        _editor.OptionSetFileSwaps(MergeToMod!, option.GroupIdx, option.OptionIdx, swaps);
+        _editor.OptionSetManipulations(MergeToMod!, option.GroupIdx, option.OptionIdx, manips);
+    }
+
+    private void CopyFiles(DirectoryInfo directory)
+    {
+        directory = Directory.CreateDirectory(directory.FullName);
+        foreach (var file in MergeFromMod!.ModPath.EnumerateDirectories()
+                     .Where(d => !d.IsHidden())
+                     .SelectMany(FileExtensions.EnumerateNonHiddenFiles))
+        {
+            var path = Path.GetRelativePath(MergeFromMod.ModPath.FullName, file.FullName);
+            path = Path.Combine(directory.FullName, path);
+            var finalDir = Path.GetDirectoryName(path)!;
+            var dir      = finalDir;
+            while (!dir.IsNullOrEmpty())
+            {
+                if (!Directory.Exists(dir))
+                    _createdDirectories.Add(dir);
+                else
+                    break;
+
+                dir = Path.GetDirectoryName(dir);
+            }
+
+            Directory.CreateDirectory(finalDir);
+            file.CopyTo(path);
+            Penumbra.Log.Verbose($"[Merger] Copied file {file.FullName} to {path}.");
+            _fileToFile.Add(file.FullName, path);
+        }
+    }
+
+    public void SplitIntoMod(string modName)
+    {
+        var mods = SelectedOptions.ToList();
+        if (mods.Count == 0)
+            return;
+
+        Error = null;
+        DirectoryInfo? dir    = null;
+        Mod?           result = null;
+        try
+        {
+            dir = _creator.CreateEmptyMod(_mods.BasePath, modName, $"Split off from {mods[0].ParentMod.Name}.");
+            if (dir == null)
+                throw new Exception($"Could not split off mods, unable to create new mod with name {modName}.");
+
+            _mods.AddMod(dir);
+            result = _mods[^1];
+            if (mods.Count == 1)
+            {
+                var files = CopySubModFiles(mods[0], dir);
+                _editor.OptionSetFiles(result, -1, 0, files);
+                _editor.OptionSetFileSwaps(result, -1, 0, mods[0].FileSwapData);
+                _editor.OptionSetManipulations(result, -1, 0, mods[0].ManipulationData);
+            }
+            else
+            {
+                foreach (var originalOption in mods)
+                {
+                    var originalGroup = originalOption.ParentMod.Groups[originalOption.GroupIdx];
+                    if (originalOption.IsDefault)
+                    {
+                        var files = CopySubModFiles(mods[0], dir);
+                        _editor.OptionSetFiles(result, -1, 0, files);
+                        _editor.OptionSetFileSwaps(result, -1, 0, mods[0].FileSwapData);
+                        _editor.OptionSetManipulations(result, -1, 0, mods[0].ManipulationData);
+                    }
+                    else
+                    {
+                        var (group, groupIdx, _) = _editor.FindOrAddModGroup(result, originalGroup.Type, originalGroup.Name);
+                        var (option, _)          = _editor.FindOrAddOption(result, groupIdx, originalOption.Name);
+                        var folder = Path.Combine(dir.FullName, group.Name, option.Name);
+                        var files  = CopySubModFiles(originalOption, new DirectoryInfo(folder));
+                        _editor.OptionSetFiles(result, groupIdx, option.OptionIdx, files);
+                        _editor.OptionSetFileSwaps(result, groupIdx, option.OptionIdx, originalOption.FileSwapData);
+                        _editor.OptionSetManipulations(result, groupIdx, option.OptionIdx, originalOption.ManipulationData);
+                    }
+                }
+            }
+        }
+        catch (Exception e)
+        {
+            Error = e;
+            if (result != null)
+                _mods.DeleteMod(result);
+            else if (dir != null)
+                try
+                {
+                    Directory.Delete(dir.FullName);
+                }
+                catch (Exception ex)
+                {
+                    Penumbra.Log.Error($"Could not clean up after failure to split options into new mod {modName}:\n{ex}");
+                }
+        }
+    }
+
+    private static Dictionary<Utf8GamePath, FullPath> CopySubModFiles(SubMod option, DirectoryInfo newMod)
+    {
+        var ret        = new Dictionary<Utf8GamePath, FullPath>(option.FileData.Count);
+        var parentPath = ((Mod)option.ParentMod).ModPath.FullName;
+        foreach (var (path, file) in option.FileData)
+        {
+            var target = Path.GetRelativePath(parentPath, file.FullName);
+            target = Path.Combine(newMod.FullName, target);
+            Directory.CreateDirectory(Path.GetDirectoryName(target)!);
+            File.Copy(file.FullName, target);
+            Penumbra.Log.Verbose($"[Splitter] Copied file {file.FullName} to {target}.");
+            ret.Add(path, new FullPath(target));
+        }
+
+        return ret;
+    }
+
+    private void DataCleanup()
+    {
+        _fileToFile.Clear();
+        _createdDirectories.Clear();
+        _createdOption = null;
+        _createdGroup  = -1;
+    }
+
+    private void FailureCleanup()
+    {
+        if (_createdGroup >= 0 && _createdGroup < MergeToMod!.Groups.Count)
+            _editor.DeleteModGroup(MergeToMod!, _createdGroup);
+        else if (_createdOption != null)
+            _editor.DeleteOption(MergeToMod!, _createdOption.GroupIdx, _createdOption.OptionIdx);
+
+        foreach (var dir in _createdDirectories)
+        {
+            if (!Directory.Exists(dir))
+                continue;
+
+            try
+            {
+                Directory.Delete(dir, true);
+                Penumbra.Log.Verbose($"[Merger] Deleted {dir}.");
+            }
+            catch (Exception ex)
+            {
+                Penumbra.Log.Error(
+                    $"Could not clean up after failing to merge {MergeFromMod!.Name} into {MergeToMod!.Name}, unable to delete {dir}:\n{ex}");
+            }
+        }
+
+        foreach (var (_, file) in _fileToFile)
+        {
+            if (!File.Exists(file))
+                continue;
+
+            try
+            {
+                File.Delete(file);
+                Penumbra.Log.Verbose($"[Merger] Deleted {file}.");
+            }
+            catch (Exception ex)
+            {
+                Penumbra.Log.Error(
+                    $"Could not clean up after failing to merge {MergeFromMod!.Name} into {MergeToMod!.Name}, unable to delete {file}:\n{ex}");
+            }
+        }
+    }
+
+    private void OnSelectionChange(Mod? oldSelection, Mod? newSelection, in ModFileSystemSelector.ModState state)
+    {
+        if (OptionGroupName == "Merges" && OptionName.Length == 0 || OptionName == oldSelection?.Name.Text)
+            OptionName = newSelection?.Name.Text ?? string.Empty;
+
+        if (MergeToMod == newSelection)
+            MergeToMod = null;
+
+        SelectedOptions.Clear();
+        MergeFromMod = newSelection;
+    }
+
+    private void OnModPathChange(ModPathChangeType type, Mod mod, DirectoryInfo? _1, DirectoryInfo? _2)
+    {
+        switch (type)
+        {
+            case ModPathChangeType.Deleted:
+            {
+                if (mod == MergeFromMod)
+                {
+                    SelectedOptions.Clear();
+                    MergeFromMod = null;
+                }
+
+                if (mod == MergeToMod)
+                    MergeToMod = null;
+                break;
+            }
+            case ModPathChangeType.StartingReload:
+                SelectedOptions.Clear();
+                MergeFromMod = null;
+                MergeToMod   = null;
+                break;
+            case ModPathChangeType.Reloaded:
+                MergeFromMod = _selector.Selected;
+                break;
+        }
+    }
+}

Penumbra/Mods/Manager/ModOptionEditor.cs

@@ -87,7 +87,7 @@ public class ModOptionEditor
         _communicator.ModOptionChanged.Invoke(ModOptionChangeType.GroupRenamed, mod, groupIdx, -1, -1);
     }
 
-    /// <summary> Add a new mod, empty option group of the given type and name. </summary>
+    /// <summary> Add a new, empty option group of the given type and name. </summary>
     public void AddModGroup(Mod mod, GroupType type, string newName)
     {
         if (!VerifyFileName(mod, null, newName, true))
@@ -110,6 +110,20 @@ public class ModOptionEditor
         _communicator.ModOptionChanged.Invoke(ModOptionChangeType.GroupAdded, mod, mod.Groups.Count - 1, -1, -1);
     }
 
+    /// <summary> Add a new mod, empty option group of the given type and name if it does not exist already. </summary>
+    public (IModGroup, int, bool) FindOrAddModGroup(Mod mod, GroupType type, string newName)
+    {
+        var idx = mod.Groups.IndexOf(g => g.Name == newName);
+        if (idx >= 0)
+            return (mod.Groups[idx], idx, false);
+
+        AddModGroup(mod, type, newName);
+        if (mod.Groups[^1].Name != newName)
+            throw new Exception($"Could not create new mod group with name {newName}.");
+
+        return (mod.Groups[^1], mod.Groups.Count - 1, true);
+    }
+
     /// <summary> Delete a given option group. Fires an event to prepare before actually deleting. </summary>
     public void DeleteModGroup(Mod mod, int groupIdx)
     {
@@ -242,6 +256,21 @@ public class ModOptionEditor
         _communicator.ModOptionChanged.Invoke(ModOptionChangeType.OptionAdded, mod, groupIdx, group.Count - 1, -1);
     }
 
+    /// <summary> Add a new empty option of the given name for the given group if it does not exist already. </summary>
+    public (SubMod, bool) FindOrAddOption(Mod mod, int groupIdx, string newName)
+    {
+        var group = mod.Groups[groupIdx];
+        var idx   = group.IndexOf(o => o.Name == newName);
+        if (idx >= 0)
+            return ((SubMod)group[idx], false);
+
+        AddOption(mod, groupIdx, newName);
+        if (group[^1].Name != newName)
+            throw new Exception($"Could not create new option with name {newName} in {group.Name}.");
+
+        return ((SubMod)group[^1], true);
+    }
+
     /// <summary> Add an existing option to a given group with a given priority. </summary>
     public void AddOption(Mod mod, int groupIdx, ISubMod option, int priority = 0)
     {

Penumbra/Mods/Manager/ModStorage.cs

@@ -2,9 +2,24 @@ using System;
 using System.Collections;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
+using OtterGui.Classes;
+using OtterGui.Widgets;
 
 namespace Penumbra.Mods.Manager;
 
+public class ModCombo : FilterComboCache<Mod>
+{
+    protected override bool IsVisible(int globalIndex, LowerString filter)
+        => Items[globalIndex].Name.Contains(filter);
+
+    protected override string ToString(Mod obj)
+        => obj.Name.Text;
+
+    public ModCombo(Func<IReadOnlyList<Mod>> generator)
+        : base(generator)
+    { }
+}
+
 public class ModStorage : IReadOnlyList<Mod>
 {
     /// <summary> The actual list of mods. </summary>

Penumbra/Services/ServiceManager.cs

@@ -1,3 +1,4 @@
+using System.Collections.Concurrent;
 using Dalamud.Plugin;
 using Microsoft.Extensions.DependencyInjection;
 using OtterGui.Classes;
@@ -13,6 +14,7 @@ using Penumbra.Interop.ResourceTree;
 using Penumbra.Interop.Services;
 using Penumbra.Meta;
 using Penumbra.Mods;
+using Penumbra.Mods.Editor;
 using Penumbra.Mods.Manager;
 using Penumbra.UI;
 using Penumbra.UI.AdvancedWindow;
@@ -158,7 +160,8 @@ public static class ServiceManager
             .AddSingleton<ResourceTab>()
             .AddSingleton<ConfigTabBar>()
             .AddSingleton<ResourceWatcher>()
-            .AddSingleton<ItemSwapTab>();
+            .AddSingleton<ItemSwapTab>()
+            .AddSingleton<ModMergeTab>();
 
     private static IServiceCollection AddModEditor(this IServiceCollection services)
         => services.AddSingleton<ModFileCollection>()
@@ -168,6 +171,7 @@ public static class ServiceManager
             .AddSingleton<ModMetaEditor>()
             .AddSingleton<ModSwapEditor>()
             .AddSingleton<ModNormalizer>()
+            .AddSingleton<ModMerger>()
             .AddSingleton<ModEditor>();
 
     private static IServiceCollection AddApi(this IServiceCollection services)

Penumbra/UI/AdvancedWindow/ModEditWindow.cs

@@ -35,6 +35,7 @@ public partial class ModEditWindow : Window, IDisposable
     private readonly MetaFileManager    _metaFileManager;
     private readonly ActiveCollections  _activeCollections;
     private readonly StainService       _stainService;
+    private readonly ModMergeTab        _modMergeTab;
 
     private Mod?    _mod;
     private Vector2 _iconSize = Vector2.Zero;
@@ -144,6 +145,7 @@ public partial class ModEditWindow : Window, IDisposable
         DrawFileTab();
         DrawMetaTab();
         DrawSwapTab();
+        _modMergeTab.Draw();
         DrawMissingFilesTab();
         DrawDuplicatesTab();
         DrawQuickImportTab();
@@ -311,7 +313,7 @@ public partial class ModEditWindow : Window, IDisposable
         }
 
         if (ImGui.Button("Delete and Redirect Duplicates"))
-            _editor.Duplicates.DeleteDuplicates(_editor.Mod!, _editor.Option!, true);
+            _editor.Duplicates.DeleteDuplicates(_editor.Files, _editor.Mod!, _editor.Option!, true);
 
         if (_editor.Duplicates.SavedSpace > 0)
         {
@@ -419,7 +421,8 @@ public partial class ModEditWindow : Window, IDisposable
         if (otherSwaps > 0)
         {
             ImGui.SameLine();
-            ImGuiUtil.DrawTextButton($"There are {otherSwaps} file swaps configured in other options.", Vector2.Zero, ColorId.RedundantAssignment.Value());
+            ImGuiUtil.DrawTextButton($"There are {otherSwaps} file swaps configured in other options.", Vector2.Zero,
+                ColorId.RedundantAssignment.Value());
         }
 
         using var child = ImRaii.Child("##swaps", -Vector2.One, true);
@@ -509,7 +512,7 @@ public partial class ModEditWindow : Window, IDisposable
 
     public ModEditWindow(PerformanceTracker performance, FileDialogService fileDialog, ItemSwapTab itemSwapTab, DataManager gameData,
         Configuration config, ModEditor editor, ResourceTreeFactory resourceTreeFactory, MetaFileManager metaFileManager,
-        StainService stainService, ActiveCollections activeCollections, UiBuilder uiBuilder, DalamudServices dalamud)
+        StainService stainService, ActiveCollections activeCollections, UiBuilder uiBuilder, DalamudServices dalamud, ModMergeTab modMergeTab)
         : base(WindowBaseLabel)
     {
         _performance       = performance;
@@ -520,6 +523,7 @@ public partial class ModEditWindow : Window, IDisposable
         _stainService      = stainService;
         _activeCollections = activeCollections;
         _dalamud           = dalamud;
+        _modMergeTab       = modMergeTab;
         _fileDialog        = fileDialog;
         _materialTab = new FileEditor<MtrlTab>(this, gameData, config, _fileDialog, "Materials", ".mtrl",
             () => _editor.Files.Mtrl, DrawMaterialPanel, () => _mod?.ModPath.FullName ?? string.Empty,

Penumbra/UI/AdvancedWindow/ModMergeTab.cs

@@ -0,0 +1,104 @@
+using System.Linq;
+using System.Numerics;
+using Dalamud.Interface;
+using ImGuiNET;
+using OtterGui;
+using OtterGui.Raii;
+using Penumbra.Mods.Editor;
+using Penumbra.Mods.Manager;
+using Penumbra.UI.Classes;
+using SixLabors.ImageSharp.ColorSpaces;
+
+namespace Penumbra.UI.AdvancedWindow;
+
+public class ModMergeTab
+{
+    private readonly ModMerger _modMerger;
+    private readonly ModCombo  _modCombo;
+
+    private string _newModName = string.Empty;
+
+    public ModMergeTab(ModMerger modMerger)
+    {
+        _modMerger = modMerger;
+        _modCombo  = new ModCombo(() => _modMerger.ModsWithoutCurrent.ToList());
+    }
+
+    public void Draw()
+    {
+        if (_modMerger.MergeFromMod == null)
+            return;
+
+        using var tab = ImRaii.TabItem("Merge Mods");
+        if (!tab)
+            return;
+
+        ImGui.AlignTextToFramePadding();
+        ImGui.TextUnformatted($"Merge {_modMerger.MergeFromMod.Name} into ");
+        ImGui.SameLine();
+        DrawCombo();
+
+        ImGui.SetNextItemWidth(300 * ImGuiHelpers.GlobalScale);
+        ImGui.InputTextWithHint("##optionGroupInput", "Target Option Group", ref _modMerger.OptionGroupName, 64);
+        ImGui.SameLine();
+        ImGui.SetNextItemWidth(300 * ImGuiHelpers.GlobalScale);
+        ImGui.InputTextWithHint("##optionInput", "Target Option Name", ref _modMerger.OptionName, 64);
+
+        if (ImGuiUtil.DrawDisabledButton("Merge", Vector2.Zero, string.Empty, !_modMerger.CanMerge))
+            _modMerger.Merge();
+
+        ImGui.Dummy(Vector2.One);
+        ImGui.Separator();
+        ImGui.Dummy(Vector2.One);
+        using (var table = ImRaii.Table("##options", 6, ImGuiTableFlags.RowBg | ImGuiTableFlags.SizingFixedFit | ImGuiTableFlags.ScrollY, ImGui.GetContentRegionAvail() with { Y = 6 * ImGui.GetFrameHeightWithSpacing()}))
+        {
+            foreach (var (option, idx) in _modMerger.MergeFromMod.AllSubMods.WithIndex())
+            {
+                using var id       = ImRaii.PushId(idx);
+                var       selected = _modMerger.SelectedOptions.Contains(option);
+                ImGui.TableNextColumn();
+                if (ImGui.Checkbox("##check", ref selected))
+                {
+                    if (selected)
+                        _modMerger.SelectedOptions.Add(option);
+                    else
+                        _modMerger.SelectedOptions.Remove(option);
+                }
+
+                if (option.IsDefault)
+                {
+                    ImGuiUtil.DrawTableColumn(option.FullName);
+                    ImGui.TableNextColumn();
+                }
+                else
+                {
+                    ImGuiUtil.DrawTableColumn(option.ParentMod.Groups[option.GroupIdx].Name);
+                    ImGuiUtil.DrawTableColumn(option.Name);
+                }
+
+                ImGuiUtil.DrawTableColumn(option.FileData.Count.ToString());
+                ImGuiUtil.DrawTableColumn(option.FileSwapData.Count.ToString());
+                ImGuiUtil.DrawTableColumn(option.Manipulations.Count.ToString());
+
+            }
+        }
+        ImGui.InputTextWithHint("##newModInput", "New Mod Name...", ref _newModName, 64);
+        if (ImGuiUtil.DrawDisabledButton("Split Off", Vector2.Zero, string.Empty, _newModName.Length == 0 || _modMerger.SelectedOptions.Count == 0))
+            _modMerger.SplitIntoMod(_newModName);
+
+        if (_modMerger.Error != null)
+        {
+            ImGui.Separator();
+            ImGui.Dummy(Vector2.One);
+            using var color = ImRaii.PushColor(ImGuiCol.Text, Colors.RegexWarningBorder);
+            ImGuiUtil.TextWrapped(_modMerger.Error.ToString());
+        }
+    }
+
+    private void DrawCombo()
+    {
+        _modCombo.Draw("##ModSelection", _modCombo.CurrentSelection?.Name.Text ?? string.Empty, string.Empty,
+            200 * ImGuiHelpers.GlobalScale, ImGui.GetTextLineHeight());
+        _modMerger.MergeToMod = _modCombo.CurrentSelection;
+    }
+}