fix: Text Editor

- Fixed oversight with the FMG Exporter where exporting modified or unique entries from the container-level options didn't work since the Difference Manager relies on the currently selected FMG (now it can use a passed ID)
- Added "From external file" option for Text Import so user isn't limited to the project-local exports

Documentation/smithbox.txt

@@ -46,9 +46,6 @@ Map Editor:
  - FIX: duping assets to new map and then pressing X to bring to camera results in incorrect placement
  - FIX: misc texture loads during map load can hang, causing the load window to never disppear. (e.g. Leyndell)
 
-Text Editor:
- - ADD: context menu in text input: add color (<font color="#31994d">Text</font>) that wraps selected text with the html tag (include detection/removal of tag when selecting existing one too)
-
 Material Editor
  - ADD: Implement Material/MATBIN editor
 
@@ -99,6 +96,11 @@ Model Editor:
  - FIX: account for scale when displaying dummies/bones
 
 
+Text Editor:
+ - ADD: context menu in text input: add color (<font color="#31994d">Text</font>) that wraps selected text with the html tag (include detection/removal of tag when selecting existing one too)
+ - FIX: issue with exporting modified/unique on container level
+ - FIX: crash on multi-select in FMG list
+
 #--------------------------------------
 # Notes
 #--------------------------------------

src/StudioCore/Editors/TextEditor/Data/FmgExporter.cs

@@ -385,6 +385,10 @@ private static void ProcessFmg(TextFmgWrapper wrapper, StoredFmgContainer stored
         storedFmg.BigEndian = wrapper.File.BigEndian;
         storedFmg.Entries = new List<FMG.Entry>();
 
+        // We have to call this so the diff cache updates for each wrapper,
+        // without changing the user selection
+        Smithbox.EditorHandler.TextEditor.DifferenceManager.TrackFmgDifferences(wrapper.ID);
+
         // Build FMG entries
         foreach (var entry in wrapper.File.Entries)
         {

src/StudioCore/Editors/TextEditor/Data/FmgImporter.cs

@@ -6,6 +6,7 @@
 using StudioCore.Editors.TextEditor.Actions;
 using StudioCore.Editors.TextEditor.Enums;
 using StudioCore.Interface;
+using StudioCore.Platform;
 using StudioCore.Resource.Locators;
 using System;
 using System.Collections.Generic;
@@ -116,6 +117,13 @@ public static void DisplayImportList(ImportType importType)
 
         if(ImGui.BeginMenu("Append"))
         {
+            if (ImGui.Selectable($"From external file"))
+            {
+                PromptExternalTextImport(ImportBehavior.Append);
+            }
+
+            ImGui.Separator();
+
             if (ImportSources.Count > 0)
             {
                 foreach (var (key, entry) in ImportSources)
@@ -137,6 +145,13 @@ public static void DisplayImportList(ImportType importType)
 
         if (ImGui.BeginMenu("Replace"))
         {
+            if (ImGui.Selectable($"From external file"))
+            {
+                PromptExternalTextImport(ImportBehavior.Replace);
+            }
+
+            ImGui.Separator();
+
             if (ImportSources.Count > 0)
             {
                 foreach (var (key, entry) in ImportSources)
@@ -161,6 +176,11 @@ public static void DisplayImportList(ImportType importType)
 
     private static void ImportText(StoredFmgContainer containerWrapper, ImportBehavior importBehavior)
     {
+        if(containerWrapper.FmgWrappers == null)
+        {
+            return;
+        }
+
         ImportActions = new List<EditorAction>();
 
         var editor = Smithbox.EditorHandler.TextEditor;
@@ -249,5 +269,50 @@ private static void LoadWrappers()
             }
         }
     }
+
+    private static StoredFmgContainer GenerateStoredFmgContainer(string path)
+    {
+        var filename = Path.GetFileName(path);
+        var wrapper = new StoredFmgContainer();
+
+        if (File.Exists(path))
+        {
+            using (var stream = File.OpenRead(path))
+            {
+                try
+                {
+                    wrapper = JsonSerializer.Deserialize(stream, StoredContainerWrapperSerializationContext.Default.StoredFmgContainer);
+                }
+                catch(Exception e)
+                {
+                    TaskLogs.AddLog($"Failed to read JSON file for Text Import: {e.Message}");
+                }
+
+                return wrapper;
+            }
+        }
+
+        return wrapper;
+    }
+
+    private static void PromptExternalTextImport(ImportBehavior type)
+    {
+        if (PlatformUtils.Instance.OpenFileDialog("Select stored text JSON", ["json"], out var path))
+        {
+            if (!File.Exists(path))
+            {
+                DialogResult message = PlatformUtils.Instance.MessageBox(
+                    "Selected file is invalid.", "Error",
+                    MessageBoxButtons.OK);
+                return;
+            }
+
+            var generatedStoredFmgContainer = GenerateStoredFmgContainer(path);
+            if (generatedStoredFmgContainer != null)
+            {
+                ImportText(generatedStoredFmgContainer, type);
+            }
+        }
+    }
 }
 

src/StudioCore/Editors/TextEditor/Framework/TextDifferenceManager.cs

@@ -37,7 +37,7 @@ public TextDifferenceManager(TextEditorScreen screen)
     /// <summary>
     /// Generate difference truth for currently selected FMG
     /// </summary>
-    public void TrackFmgDifferences()
+    public void TrackFmgDifferences(int setFmgId = -1)
     {
         CacheFilled = false;
         AdditionCache = new();
@@ -55,10 +55,19 @@ public void TrackFmgDifferences()
         var containerCategory = Selection.SelectedContainerWrapper.ContainerDisplayCategory;
         var containerSubCategory = Selection.SelectedContainerWrapper.ContainerDisplaySubCategory;
         var containerName = Selection.SelectedContainerWrapper.Filename;
+
+        // Fmg ID for comparison is selected FMG
         var fmgID = Selection.SelectedFmgWrapper.ID;
 
+        // Set the ID to passed instead of selected if called from the FmgExporter
+        if(setFmgId != -1)
+        {
+            fmgID = setFmgId;
+        }
+
         if (TextBank.VanillaBankLoaded)
         {
+            // Get vanilla container and entries
             var vanillaContainer = TextBank.VanillaFmgBank
                 .Where(e => e.Value.ContainerDisplayCategory == containerCategory)
                 .Where(e => e.Value.Filename == containerName)
@@ -92,7 +101,25 @@ public void TrackFmgDifferences()
                 }
             }
 
-            foreach(var entry in Selection.SelectedFmgWrapper.File.Entries)
+            // Get primary container and enetries
+            var primaryContainer = TextBank.FmgBank
+                .Where(e => e.Value.ContainerDisplayCategory == containerCategory)
+                .Where(e => e.Value.Filename == containerName)
+                .FirstOrDefault();
+
+            if (Smithbox.ProjectType is ProjectType.DS2 or ProjectType.DS2S)
+            {
+                primaryContainer = TextBank.FmgBank
+                .Where(e => e.Value.ContainerDisplayCategory == containerCategory)
+                .Where(e => e.Value.ContainerDisplaySubCategory == containerSubCategory)
+                .Where(e => e.Value.Filename == containerName)
+                .FirstOrDefault();
+            }
+
+            var primaryFmg = primaryContainer.Value.FmgWrappers
+            .Where(e => e.ID == fmgID).FirstOrDefault();
+
+            foreach (var entry in primaryFmg.File.Entries)
             {
                 string entryId = $"{entry.ID}";