From 76eb18c357e438b1c428d2a5551b3d53ef88fffc Mon Sep 17 00:00:00 2001
From: Qichen Zhu <57348009+QichenZhu@users.noreply.github.com>
Date: Sat, 1 Jun 2024 23:35:17 +1200
Subject: [PATCH] fix: correct content height in TextKit 1 compatibility mode

---
 ios/MarkdownTextInputDecoratorView.mm | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/ios/MarkdownTextInputDecoratorView.mm b/ios/MarkdownTextInputDecoratorView.mm
index eaa8a59b..a77d7d53 100644
--- a/ios/MarkdownTextInputDecoratorView.mm
+++ b/ios/MarkdownTextInputDecoratorView.mm
@@ -72,6 +72,14 @@ - (void)didMoveToWindow {
     _textView = (RCTUITextView *)_backedTextInputView;
     [_textView setMarkdownUtils:_markdownUtils];
     NSLayoutManager *layoutManager = _textView.layoutManager; // switching to TextKit 1 compatibility mode
+
+    // Correct content height in TextKit 1 compatibility mode. (See https://github.com/Expensify/App/issues/41567)
+    // Consider removing this fix if it is no longer needed after migrating to TextKit 2.
+    CGSize contentSize = _textView.contentSize;
+    CGRect textBounds = [layoutManager usedRectForTextContainer:_textView.textContainer];
+    contentSize.height = textBounds.size.height + _textView.textContainerInset.top + _textView.textContainerInset.bottom;
+    [_textView setContentSize:contentSize];
+
     layoutManager.allowsNonContiguousLayout = NO; // workaround for onScroll issue
     object_setClass(layoutManager, [MarkdownLayoutManager class]);
     [layoutManager setValue:_markdownUtils forKey:@"markdownUtils"];