From 99d0b4f43c545dea6cb70a97737ff41f42730bdf Mon Sep 17 00:00:00 2001
From: QichenZhu <57348009+QichenZhu@users.noreply.github.com>
Date: Thu, 4 Jul 2024 14:11:34 +1200
Subject: [PATCH] Fix selection issue for text containing emoji

---
 ios/RCTBaseTextInputView+Markdown.mm      | 9 ++++++++-
 ios/RCTTextInputComponentView+Markdown.mm | 9 ++++++++-
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/ios/RCTBaseTextInputView+Markdown.mm b/ios/RCTBaseTextInputView+Markdown.mm
index 209dc6bb..7662d545 100644
--- a/ios/RCTBaseTextInputView+Markdown.mm
+++ b/ios/RCTBaseTextInputView+Markdown.mm
@@ -27,7 +27,14 @@ - (BOOL)markdown_textOf:(NSAttributedString *)newText equals:(NSAttributedString
 {
   RCTMarkdownUtils *markdownUtils = [self getMarkdownUtils];
   if (markdownUtils != nil) {
-    return [newText isEqualToAttributedString:oldText];
+    // Emoji characters are automatically assigned an AppleColorEmoji NSFont and the original font is moved to NSOriginalFont
+    // We need to remove these attributes before comparison
+    NSMutableAttributedString *newTextCopy = [newText mutableCopy];
+    NSMutableAttributedString *oldTextCopy = [oldText mutableCopy];
+    [newTextCopy removeAttribute:@"NSFont" range:NSMakeRange(0, newTextCopy.length)];
+    [oldTextCopy removeAttribute:@"NSFont" range:NSMakeRange(0, oldTextCopy.length)];
+    [oldTextCopy removeAttribute:@"NSOriginalFont" range:NSMakeRange(0, oldTextCopy.length)];
+    return [newTextCopy isEqualToAttributedString:oldTextCopy];
   }
 
   return [self markdown_textOf:newText equals:oldText];
diff --git a/ios/RCTTextInputComponentView+Markdown.mm b/ios/RCTTextInputComponentView+Markdown.mm
index 1a4581f3..3161e00d 100644
--- a/ios/RCTTextInputComponentView+Markdown.mm
+++ b/ios/RCTTextInputComponentView+Markdown.mm
@@ -51,7 +51,14 @@ - (BOOL)markdown__textOf:(NSAttributedString *)newText equals:(NSAttributedStrin
 {
   RCTMarkdownUtils *markdownUtils = [self getMarkdownUtils];
   if (markdownUtils != nil) {
-    return [newText isEqualToAttributedString:oldText];
+    // Emoji characters are automatically assigned an AppleColorEmoji NSFont and the original font is moved to NSOriginalFont
+    // We need to remove these attributes before comparison
+    NSMutableAttributedString *newTextCopy = [newText mutableCopy];
+    NSMutableAttributedString *oldTextCopy = [oldText mutableCopy];
+    [newTextCopy removeAttribute:@"NSFont" range:NSMakeRange(0, newTextCopy.length)];
+    [oldTextCopy removeAttribute:@"NSFont" range:NSMakeRange(0, oldTextCopy.length)];
+    [oldTextCopy removeAttribute:@"NSOriginalFont" range:NSMakeRange(0, oldTextCopy.length)];
+    return [newTextCopy isEqualToAttributedString:oldTextCopy];
   }
 
   return [self markdown__textOf:newText equals:oldText];