From 03adb4260fc0c09686f2d3f2b773253b31759186 Mon Sep 17 00:00:00 2001
From: Samuel Newman <mozzius@protonmail.com>
Date: Wed, 15 Oct 2025 19:14:42 +0300
Subject: [PATCH] patch fractional font size issue (#9199)

---
 patches/react-native-uitextview+1.4.0.patch | 33 +++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 patches/react-native-uitextview+1.4.0.patch

diff --git a/patches/react-native-uitextview+1.4.0.patch b/patches/react-native-uitextview+1.4.0.patch
new file mode 100644
index 0000000000..345e6b0e85
--- /dev/null
+++ b/patches/react-native-uitextview+1.4.0.patch
@@ -0,0 +1,33 @@
+diff --git a/node_modules/react-native-uitextview/ios/RNUITextViewShadow.swift b/node_modules/react-native-uitextview/ios/RNUITextViewShadow.swift
+index c34ba71..13d576a 100644
+--- a/node_modules/react-native-uitextview/ios/RNUITextViewShadow.swift
++++ b/node_modules/react-native-uitextview/ios/RNUITextViewShadow.swift
+@@ -159,13 +159,23 @@ class RNUITextViewShadow: RCTShadowView {
+     let maxSize = CGSize(width: CGFloat(maxWidth), height: CGFloat(MAXFLOAT))
+     let textSize = self.attributedText.boundingRect(with: maxSize, options: .usesLineFragmentOrigin, context: nil)
+     
+-    var totalLines = self.lineHeight == 0.0 ? 0 : Int(ceil(textSize.height / self.lineHeight))
+-
+-    if self.numberOfLines != 0, totalLines > self.numberOfLines {
+-      totalLines = self.numberOfLines
++    var finalHeight: CGFloat
++
++    if self.numberOfLines != 0 && self.lineHeight != 0.0 {
++      // numberOfLines is set with custom line height - need to calculate lines and snap to lineHeight multiples
++      // NOTE: this calculation can be inaccurate with fractional font sizes
++      var totalLines = Int(ceil(textSize.height / self.lineHeight))
++      if totalLines > self.numberOfLines {
++        totalLines = self.numberOfLines
++      }
++      finalHeight = CGFloat(totalLines) * self.lineHeight
++    } else {
++      // Either no numberOfLines limit, or no custom lineHeight - use actual text height
++      // (numberOfLines without custom lineHeight is handled by the UITextView's textContainer.maximumNumberOfLines)
++      finalHeight = textSize.height
+     }
+ 
+-    self.frameSize = CGSize(width: CGFloat(maxWidth), height: CGFloat(CGFloat(totalLines) * self.lineHeight))
++    self.frameSize = CGSize(width: CGFloat(maxWidth), height: finalHeight)
+     return YGSize(width: Float(self.frameSize.width), height: Float(self.frameSize.height))
+   }
+