Fix Emoji picker's position changes on decreasing the screen size

src/components/EmojiPicker/EmojiPicker.js

@@ -34,21 +34,6 @@ const EmojiPicker = forwardRef((props, ref) => {
     const onEmojiSelected = useRef(() => {});
     const emojiSearchInput = useRef();
 
-    useEffect(() => {
-        if (isEmojiPickerVisible) {
-            Keyboard.dismiss();
-        }
-
-        const emojiPopoverDimensionListener = Dimensions.addEventListener('change', () => {
-            calculateAnchorPosition(emojiPopoverAnchor.current).then((value) => {
-                setEmojiPopoverAnchorPosition(value);
-            });
-        });
-        return () => {
-            emojiPopoverDimensionListener.remove();
-        };
-    }, [isEmojiPickerVisible]);
-
     /**
      * Show the emoji picker menu.
      *
@@ -110,9 +95,7 @@ const EmojiPicker = forwardRef((props, ref) => {
     const selectEmoji = (emoji, emojiObject) => {
         // Prevent fast click / multiple emoji selection;
         // The first click will hide the emoji picker by calling the hideEmojiPicker() function
-        // and in that function the emojiPopoverAnchor ref to will be set to null (synchronously)
-        // thus we rely on that prop to prevent fast click / multiple emoji selection
-        if (!emojiPopoverAnchor.current) {
+        if (!isEmojiPickerVisible) {
             return;
         }
 
@@ -130,7 +113,31 @@ const EmojiPicker = forwardRef((props, ref) => {
      */
     const isActiveReportAction = (actionID) => Boolean(actionID) && reportAction.reportActionID === actionID;
 
-    useImperativeHandle(ref, () => ({showEmojiPicker, isActiveReportAction, hideEmojiPicker, isEmojiPickerVisible}));
+    const resetEmojiPopoverAnchor = () => (emojiPopoverAnchor.current = null);
+
+    useImperativeHandle(ref, () => ({showEmojiPicker, isActiveReportAction, hideEmojiPicker, isEmojiPickerVisible, resetEmojiPopoverAnchor}));
+
+    useEffect(() => {
+        if (isEmojiPickerVisible) {
+            Keyboard.dismiss();
+        }
+
+        const emojiPopoverDimensionListener = Dimensions.addEventListener('change', () => {
+            if (!emojiPopoverAnchor.current) {
+                // In small screen width, the window size change might be due to keyboard open/hide, we should avoid hide EmojiPicker in those cases
+                if (isEmojiPickerVisible && !props.isSmallScreenWidth) {
+                    hideEmojiPicker();
+                }
+                return;
+            }
+            calculateAnchorPosition(emojiPopoverAnchor.current).then((value) => {
+                setEmojiPopoverAnchorPosition(value);
+            });
+        });
+        return () => {
+            emojiPopoverDimensionListener.remove();
+        };
+    }, [isEmojiPickerVisible, props.isSmallScreenWidth]);
 
     // There is no way to disable animations, and they are really laggy, because there are so many
     // emojis. The best alternative is to set it to 1ms so it just "pops" in and out

src/components/EmojiPicker/EmojiPickerButton.js

@@ -1,4 +1,4 @@
-import React from 'react';
+import React, {useEffect} from 'react';
 import PropTypes from 'prop-types';
 import styles from '../../styles/styles';
 import * as StyleUtils from '../../styles/StyleUtils';
@@ -35,6 +35,7 @@ const defaultProps = {
 
 function EmojiPickerButton(props) {
     let emojiPopoverAnchor = null;
+    useEffect(() => EmojiPickerAction.resetEmojiPopoverAnchor, []);
     return (
         <Tooltip text={props.translate('reportActionCompose.emoji')}>
             <PressableWithoutFeedback

src/components/Reactions/AddReactionBubble.js

@@ -1,4 +1,4 @@
-import React, {useRef} from 'react';
+import React, {useRef, useEffect} from 'react';
 import {View} from 'react-native';
 import PropTypes from 'prop-types';
 import Tooltip from '../Tooltip';
@@ -55,6 +55,7 @@ const defaultProps = {
 
 function AddReactionBubble(props) {
     const ref = useRef();
+    useEffect(() => EmojiPickerAction.resetEmojiPopoverAnchor, []);
 
     const onPress = () => {
         const openPicker = (refParam, anchorOrigin) => {

src/libs/actions/EmojiPickerAction.js

@@ -52,4 +52,11 @@ function isEmojiPickerVisible() {
     return emojiPickerRef.current.isEmojiPickerVisible;
 }
 
-export {emojiPickerRef, showEmojiPicker, hideEmojiPicker, isActiveReportAction, isEmojiPickerVisible};
+function resetEmojiPopoverAnchor() {
+    if (!emojiPickerRef.current) {
+        return;
+    }
+    return emojiPickerRef.current.resetEmojiPopoverAnchor();
+}
+
+export {emojiPickerRef, showEmojiPicker, hideEmojiPicker, isActiveReportAction, isEmojiPickerVisible, resetEmojiPopoverAnchor};