From 178094fd0f5e85724b0b0545c15bea325bda0079 Mon Sep 17 00:00:00 2001
From: Georg Bauer <gb@rfc1437.de>
Date: Fri, 31 Jul 2026 11:48:45 +0200
Subject: [PATCH] Fix source view rendering while scrolling

---
 ios/Sources/DetailScreens.swift | 34 ++++++++++++++++++++-------------
 1 file changed, 21 insertions(+), 13 deletions(-)

diff --git a/ios/Sources/DetailScreens.swift b/ios/Sources/DetailScreens.swift
index 5c6ec49..06f8e7a 100644
--- a/ios/Sources/DetailScreens.swift
+++ b/ios/Sources/DetailScreens.swift
@@ -343,6 +343,7 @@ final class RepositoryFileViewController: UIViewController, QLPreviewControllerD
     private let spinner = UIActivityIndicatorView(style: .medium)
     private var loadingTask: Task<Void, Never>?
     private var previewURL: URL?
+    private weak var sourceScrollView: UIScrollView?
     private weak var sourceTextView: UITextView?
 
     init(context: AppContext, owner: String, repository: String, path: String) {
@@ -382,7 +383,7 @@ final class RepositoryFileViewController: UIViewController, QLPreviewControllerD
 
     override func viewDidLayoutSubviews() {
         super.viewDidLayoutSubviews()
-        updateSourceContentSize()
+        updateSourceLayout()
     }
 
     private func isMediaFile(_ path: String) -> Bool {
@@ -424,7 +425,13 @@ final class RepositoryFileViewController: UIViewController, QLPreviewControllerD
         paragraph.lineBreakMode = .byClipping
         text.addAttribute(.paragraphStyle, value: paragraph, range: NSRange(location: 0, length: text.length))
 
-        let textView = UITextView(frame: view.bounds)
+        let scrollView = UIScrollView(frame: view.bounds)
+        scrollView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+        scrollView.alwaysBounceHorizontal = true
+        scrollView.isDirectionalLockEnabled = true
+        scrollView.showsHorizontalScrollIndicator = true
+
+        let textView = UITextView(frame: .zero)
         textView.textContainer.size = CGSize(
             width: CGFloat.greatestFiniteMagnitude,
             height: CGFloat.greatestFiniteMagnitude
@@ -432,19 +439,18 @@ final class RepositoryFileViewController: UIViewController, QLPreviewControllerD
         textView.textContainer.lineBreakMode = .byClipping
         textView.textContainer.widthTracksTextView = false
         textView.textStorage.setAttributedString(text)
-        textView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
         textView.isEditable = false
+        textView.isScrollEnabled = false
         textView.isSelectable = true
-        textView.alwaysBounceHorizontal = true
-        textView.isDirectionalLockEnabled = true
-        textView.showsHorizontalScrollIndicator = true
+        sourceScrollView = scrollView
         sourceTextView = textView
-        view.addSubview(textView)
-        updateSourceContentSize()
+        scrollView.addSubview(textView)
+        view.addSubview(scrollView)
+        updateSourceLayout()
     }
 
-    private func updateSourceContentSize() {
-        guard let textView = sourceTextView else { return }
+    private func updateSourceLayout() {
+        guard let scrollView = sourceScrollView, let textView = sourceTextView else { return }
         textView.textContainer.widthTracksTextView = false
         textView.textContainer.size = CGSize(
             width: CGFloat.greatestFiniteMagnitude,
@@ -452,16 +458,18 @@ final class RepositoryFileViewController: UIViewController, QLPreviewControllerD
         )
         textView.layoutManager.ensureLayout(for: textView.textContainer)
         let textSize = textView.layoutManager.usedRect(for: textView.textContainer).size
-        textView.contentSize = CGSize(
+        let contentSize = CGSize(
             width: max(
-                textView.bounds.width,
+                scrollView.bounds.width,
                 ceil(textSize.width + textView.textContainerInset.left + textView.textContainerInset.right)
             ),
             height: max(
-                textView.bounds.height,
+                scrollView.bounds.height,
                 ceil(textSize.height + textView.textContainerInset.top + textView.textContainerInset.bottom)
             )
         )
+        textView.frame = CGRect(origin: .zero, size: contentSize)
+        scrollView.contentSize = contentSize
     }
 
     private func showQuickLook(_ data: Data) throws {