From cf317e15e916183734aba2b0bfcb34a5d9b10c02 Mon Sep 17 00:00:00 2001
From: Shadowfacts <me@shadowfacts.net>
Date: Mon, 1 Apr 2024 12:40:30 -0400
Subject: [PATCH] Designed for iPad: Possible fix for gallery content being
 positioned/sized incorrectly

See #446
---
 .../Sources/GalleryVC/GalleryItemViewController.swift    | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Packages/GalleryVC/Sources/GalleryVC/GalleryItemViewController.swift b/Packages/GalleryVC/Sources/GalleryVC/GalleryItemViewController.swift
index c28f1433..4c810c42 100644
--- a/Packages/GalleryVC/Sources/GalleryVC/GalleryItemViewController.swift
+++ b/Packages/GalleryVC/Sources/GalleryVC/GalleryItemViewController.swift
@@ -43,6 +43,7 @@ class GalleryItemViewController: UIViewController {
     private(set) var controlsVisible: Bool = true
     private(set) var scrollAndZoomEnabled = true
     
+    private var scrollViewSizeForLastZoomScaleUpdate: CGSize?
     override var prefersHomeIndicatorAutoHidden: Bool {
         return !controlsVisible
     }
@@ -219,6 +220,12 @@ class GalleryItemViewController: UIViewController {
     override func viewDidLayoutSubviews() {
         super.viewDidLayoutSubviews()
         
+        // When the scrollView size changes, make sure the zoom scale is up-to-date since it depends on the scrollView's bounds.
+        // This might also fix an issue on macOS (Designed for iPad) where the content isn't placed correctly. See #446
+        if scrollViewSizeForLastZoomScaleUpdate != scrollView.bounds.size {
+            scrollViewSizeForLastZoomScaleUpdate = scrollView.bounds.size
+            updateZoomScale(resetZoom: true)
+        }
         centerContent()
     }
     
@@ -303,6 +310,8 @@ class GalleryItemViewController: UIViewController {
     }
     
     func updateZoomScale(resetZoom: Bool) {
+        scrollView.contentSize = content.contentSize
+        
         guard scrollAndZoomEnabled else {
             scrollView.maximumZoomScale = 1
             scrollView.minimumZoomScale = 1