From 33dfc9db928275e0b8d2f62433839cb649a2734b Mon Sep 17 00:00:00 2001
From: Tucker Connelly <web@tuckerconnelly.com>
Date: Fri, 10 Jun 2016 04:20:12 -0700
Subject: [PATCH] Vertically center iOS text if lineHeight is set

Summary:
First PR!!

This fixes https://github.com/facebook/react-native/issues/2991 :)
Closes https://github.com/facebook/react-native/pull/7603

Differential Revision: D3417257

fbshipit-source-id: 074d56c1dfc0a9ba713e59c804286fd915589eeb
---
 Libraries/Text/RCTShadowText.m | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Libraries/Text/RCTShadowText.m b/Libraries/Text/RCTShadowText.m
index eced9cd0cd827e..72461db6e68b01 100644
--- a/Libraries/Text/RCTShadowText.m
+++ b/Libraries/Text/RCTShadowText.m
@@ -369,6 +369,14 @@ - (void)_setParagraphStyleOnAttributedString:(NSMutableAttributedString *)attrib
     }
     paragraphStyle.minimumLineHeight = lineHeight;
     paragraphStyle.maximumLineHeight = lineHeight;
+
+    // vertically center text
+    CGFloat fontSize = _fontSize && !isnan(_fontSize) ? _fontSize : UIFont.systemFontSize;
+    fontSize *= fontSizeMultiplier;
+
+    [attributedString addAttribute:NSBaselineOffsetAttributeName
+                             value:@(lineHeight/2 - fontSize/2)
+                             range:(NSRange){0, attributedString.length}];
     [attributedString addAttribute:NSParagraphStyleAttributeName
                              value:paragraphStyle
                              range:(NSRange){0, attributedString.length}];