Fix primaryTextLayoutManager memory issue and initialization order

Resolves an issue with the text layout manager by ensuring proper initialization
order and preventing memory issues. The main changes include setting the primary
text layout manager to nil before removing it, setting text content after setup,
and reordering initialization steps to avoid potential crashes during view setup.

Author: krzyzanowskim

Sources/STTextViewAppKit/STTextView.swift

@@ -403,12 +403,14 @@ import AVFoundation
     /// The manager that lays out text for the text view's text container.
     @objc dynamic open var textLayoutManager: NSTextLayoutManager {
         willSet {
+            textContentManager.primaryTextLayoutManager = nil
             textContentManager.removeTextLayoutManager(newValue)
         }
         didSet {
             textContentManager.addTextLayoutManager(textLayoutManager)
             textContentManager.primaryTextLayoutManager = textLayoutManager
             setupTextLayoutManager(textLayoutManager)
+            self.text = text
         }
     }
 
@@ -612,8 +614,6 @@ import AVFoundation
 
         super.init(frame: frameRect)
 
-        setupTextLayoutManager(textLayoutManager)
-
         textFinderBarContainer.client = self
         textFinder.findBarContainer = textFinderBarContainer
 
@@ -636,6 +636,7 @@ import AVFoundation
             addGestureRecognizer(recognizer)
         }
 
+        setupTextLayoutManager(textLayoutManager)
         setSelectedTextRange(NSTextRange(location: textLayoutManager.documentRange.location), updateLayout: false)
     }
 

Sources/STTextViewUIKit/STTextView.swift

@@ -36,12 +36,14 @@ import STTextViewCommon
     /// The manager that lays out text for the text view's text container.
     @objc dynamic open var textLayoutManager: NSTextLayoutManager {
         willSet {
+            textContentManager.primaryTextLayoutManager = nil
             textContentManager.removeTextLayoutManager(newValue)
         }
         didSet {
             textContentManager.addTextLayoutManager(textLayoutManager)
             textContentManager.primaryTextLayoutManager = textLayoutManager
             setupTextLayoutManager(textLayoutManager)
+            self.text = text
         }
     }
 
@@ -444,13 +446,9 @@ import STTextViewCommon
 
         super.init(frame: frame)
 
-        setupTextLayoutManager(textLayoutManager)
-
         contentView.clipsToBounds = clipsToBounds
         lineHighlightView.clipsToBounds = clipsToBounds
 
-        setSelectedTextRange(NSTextRange(location: textLayoutManager.documentRange.location), updateLayout: false)
-
         addSubview(contentView)
         contentView.addSubview(lineHighlightView)
 
@@ -462,6 +460,9 @@ import STTextViewCommon
 
         updateEditableInteraction()
         isGutterVisible = showsLineNumbers
+
+        setupTextLayoutManager(textLayoutManager)
+        setSelectedTextRange(NSTextRange(location: textLayoutManager.documentRange.location), updateLayout: false)
     }
 
     @available(*, unavailable)