From ddefb46980ea96a8e26768d44a9fcb0378e4d988 Mon Sep 17 00:00:00 2001
From: Matthew Horan <matt@matthoran.com>
Date: Thu, 28 Nov 2024 00:40:30 -0500
Subject: [PATCH] fix: don't jump to height when iOS keyboard is rapidly
 opened/closed

The interactive dismissal logic would get tripped up if the keyboard was
rapidly opened and closed, which can happen if a hardware keyboard is
used and the autosuggest dock appears and then disappears when the on
screen keyboard is opened.

Fixes #6727.
---
 .../REAKeyboardEventObserver.mm                | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/packages/react-native-reanimated/apple/reanimated/apple/keyboardObserver/REAKeyboardEventObserver.mm b/packages/react-native-reanimated/apple/reanimated/apple/keyboardObserver/REAKeyboardEventObserver.mm
index 21ca00be810..18b46a63f16 100644
--- a/packages/react-native-reanimated/apple/reanimated/apple/keyboardObserver/REAKeyboardEventObserver.mm
+++ b/packages/react-native-reanimated/apple/reanimated/apple/keyboardObserver/REAKeyboardEventObserver.mm
@@ -12,6 +12,7 @@ typedef NS_ENUM(NSUInteger, KeyboardState) {
   OPEN = 2,
   CLOSING = 3,
   CLOSED = 4,
+  OPENING_INTERACTIVE = 6
 };
 
 @implementation REAKeyboardEventObserver {
@@ -25,6 +26,7 @@ @implementation REAKeyboardEventObserver {
   float _targetKeyboardHeight;
   REAUIView *_keyboardView;
   bool _isKeyboardObserverAttached;
+  bool _isInteractiveDismissalCanceled;
 }
 
 - (instancetype)init
@@ -35,6 +37,7 @@ - (instancetype)init
   _state = UNKNOWN;
   _animationStartTimestamp = 0;
   _isKeyboardObserverAttached = false;
+  _isInteractiveDismissalCanceled = false;
   NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
 
   [notificationCenter addObserver:self
@@ -213,20 +216,21 @@ - (void)keyboardWillChangeFrame:(NSNotification *)notification
   }
 
   /*
-    This may seem a bit confusing, but usually, the state should be either OPENED or CLOSED.
-    However, if it shows as OPENING, it means that the interactive dismissal was canceled.
+   If interactive dismissal was canceled, beginFrame may not reflect the latest position
+   of the keyboard. We need to check whether interactive dismissal was canceled, get the
+   the latest frame directly from the keyboardView, then reset the flag.
   */
-  bool isInteractiveMode = _state == OPENING && _isKeyboardObserverAttached;
+  bool isInteractiveDismissalCanceled = _isInteractiveDismissalCanceled;
   auto keyboardView = [self getKeyboardView];
   if (_state == CLOSING) {
     _targetKeyboardHeight = 0;
-  } else if (isInteractiveMode) {
-    // This condition can be met after canceling interactive dismissal.
+  } else if (isInteractiveDismissalCanceled) {
     _initialKeyboardHeight = windowSize.height - keyboardView.frame.origin.y;
+    _isInteractiveDismissalCanceled = false;
   }
 
   bool hasKeyboardAnimation = [self hasAnyAnimation:keyboardView];
-  if (hasKeyboardAnimation || isInteractiveMode) {
+  if (hasKeyboardAnimation || isInteractiveDismissalCanceled) {
     _measuringView.frame = CGRectMake(0, -1, 0, _initialKeyboardHeight);
     [UIView animateWithDuration:animationDuration
                      animations:^{
@@ -338,8 +342,10 @@ - (void)updateKeyboardHeightDuringInteractiveDismiss:(CGPoint)oldKeyboardFrame
     return;
   }
   float visibleKeyboardHeight = windowHeight - (newKeyboardFrame.y - keyboardHeight / 2);
+  _isInteractiveDismissalCanceled = false;
   if (oldKeyboardFrame.y > newKeyboardFrame.y) {
     _state = OPENING;
+    _isInteractiveDismissalCanceled = true;
   } else if (oldKeyboardFrame.y < newKeyboardFrame.y) {
     _state = CLOSING;
   }