(fix: #233) Fix TextFormation editing (#239)

### Description

- Cleans up undo/redo operations when TextFormation is activated, for
instance when inserting or deleting a newline.

> ~Note: Requires
[CodeEditTextView#25](CodeEditApp/CodeEditTextView#25)
to be merged.~ Merged!

### Related Issues

* closes #233

### Checklist

- [x] I read and understood the [contributing
guide](https://github.com/CodeEditApp/CodeEdit/blob/main/CONTRIBUTING.md)
as well as the [code of
conduct](https://github.com/CodeEditApp/CodeEdit/blob/main/CODE_OF_CONDUCT.md)
- [x] The issues this PR addresses are related to each other
- [x] My changes generate no new warnings
- [x] My code builds and runs on my machine
- [x] My changes are all related to the related issue above
- [x] I documented my code

### Screenshots


https://github.com/CodeEditApp/CodeEditSourceEditor/assets/35942988/d842b77d-60b4-4afd-be6c-2fb3d0342c4c

Author: thecoolwinter

Example/CodeEditSourceEditorExample/CodeEditSourceEditorExample.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -17,7 +17,7 @@ let package = Package(
         // A fast, efficient, text view for code.
         .package(
             url: "https://github.com/CodeEditApp/CodeEditTextView.git",
-            from: "0.7.2"
+            from: "0.7.3"
         ),
         // tree-sitter languages
         .package(

Package.swift

@@ -0,0 +1,17 @@
+//
+//  TextMutation+isEmpty.swift
+//  CodeEditSourceEditor
+//
+//  Created by Khan Winter on 3/1/24.
+//
+
+import TextStory
+
+extension TextMutation {
+    /// Determines if the mutation is an empty mutation.
+    ///
+    /// Will return `true` if the mutation is neither a delete operation nor an insert operation.
+    var isEmpty: Bool {
+        self.string.isEmpty && self.range.isEmpty
+    }
+}

Sources/CodeEditSourceEditor/Extensions/TextMutation+isEmpty.swift

@@ -33,13 +33,25 @@ extension TextView: TextInterface {
     }
 
     /// Applies the mutation to the text view.
+    ///
+    /// If the mutation is empty it will be ignored.
+    ///
     /// - Parameter mutation: The mutation to apply.
     public func applyMutation(_ mutation: TextMutation) {
+        guard !mutation.isEmpty else { return }
+
+        layoutManager.beginTransaction()
+        textStorage.beginEditing()
+
         layoutManager.willReplaceCharactersInRange(range: mutation.range, with: mutation.string)
+        _undoManager?.registerMutation(mutation)
+        textStorage.replaceCharacters(in: mutation.range, with: mutation.string)
         selectionManager.didReplaceCharacters(
             in: mutation.range,
             replacementLength: (mutation.string as NSString).length
         )
-        textStorage.replaceCharacters(in: mutation.range, with: mutation.string)
+
+        textStorage.endEditing()
+        layoutManager.endTransaction()
     }
 }

Sources/CodeEditSourceEditor/Extensions/TextView+/TextView+TextFormation.swift

@@ -20,9 +20,13 @@ struct TabReplacementFilter: Filter {
         with providers: WhitespaceProviders
     ) -> FilterAction {
         if mutation.string == "\t" && indentOption != .tab && mutation.delta > 0 {
-            interface.applyMutation(TextMutation(insert: indentOption.stringValue,
-                                                 at: mutation.range.location,
-                                                 limit: mutation.limit))
+            interface.applyMutation(
+                TextMutation(
+                    insert: indentOption.stringValue,
+                    at: mutation.range.location,
+                    limit: mutation.limit
+                )
+            )
             return .discard
         } else {
             return .none