Migrate EmojiPickerMenu to FlashList

assets/emojis/index.ts

@@ -1,3 +1,5 @@
+import getOperatingSystem from '@libs/getOperatingSystem';
+import CONST from '@src/CONST';
 import emojis from './common';
 import enEmojis from './en';
 import esEmojis from './es';
@@ -31,5 +33,21 @@ const localeEmojis = {
     es: esEmojis,
 } as const;
 
-export {emojiNameTable, emojiCodeTableWithSkinTones, localeEmojis};
-export {skinTones, categoryFrequentlyUsed, default} from './common';
+// On windows, flag emojis are not supported
+const emojisForOperatingSystem =
+    getOperatingSystem() === CONST.OS.WINDOWS
+        ? emojis.slice(
+              0,
+              emojis.findIndex((emoji) => {
+                  if (!('header' in emoji)) {
+                      return;
+                  }
+
+                  return emoji.header && emoji.code === 'flags';
+              }),
+          )
+        : emojis;
+
+export default emojisForOperatingSystem;
+export {emojiNameTable, emojiCodeTableWithSkinTones, localeEmojis, emojisForOperatingSystem};
+export {skinTones, categoryFrequentlyUsed} from './common';

src/CONST.ts

@@ -943,6 +943,11 @@ const CONST = {
     IOS_CAMERAROLL_ACCESS_ERROR: 'Access to photo library was denied',
     ADD_PAYMENT_MENU_POSITION_Y: 226,
     ADD_PAYMENT_MENU_POSITION_X: 356,
+    EMOJI_PICKER_ITEM_TYPES: {
+        HEADER: 'header',
+        EMOJI: 'emoji',
+        SPACER: 'spacer',
+    },
     EMOJI_PICKER_SIZE: {
         WIDTH: 320,
         HEIGHT: 416,

src/components/EmojiPicker/EmojiPickerMenu/BaseEmojiPickerMenu.js

@@ -0,0 +1,161 @@
+import {FlashList} from '@shopify/flash-list';
+import PropTypes from 'prop-types';
+import React, {useMemo} from 'react';
+import {StyleSheet, Text, View} from 'react-native';
+import CategoryShortcutBar from '@components/EmojiPicker/CategoryShortcutBar';
+import EmojiSkinToneList from '@components/EmojiPicker/EmojiSkinToneList';
+import refPropTypes from '@components/refPropTypes';
+import useLocalize from '@hooks/useLocalize';
+import useThemeStyles from '@hooks/useThemeStyles';
+import useWindowDimensions from '@hooks/useWindowDimensions';
+import stylePropTypes from '@styles/stylePropTypes';
+import CONST from '@src/CONST';
+
+const emojiPropTypes = {
+    /** The code of the item */
+    code: PropTypes.string.isRequired,
+
+    /** Whether the item is a header or not */
+    header: PropTypes.bool,
+
+    /** Whether the item is a spacer or not */
+    spacer: PropTypes.bool,
+
+    /** Types of an emoji - e.g. different skin types */
+    types: PropTypes.arrayOf(PropTypes.string),
+};
+
+const propTypes = {
+    /** Indicates if the emoji list is filtered or not */
+    isFiltered: PropTypes.bool.isRequired,
+
+    /** Array of header emojis */
+    headerEmojis: PropTypes.arrayOf(PropTypes.shape(emojiPropTypes)).isRequired,
+
+    /** Function to scroll to a specific header in the emoji list */
+    scrollToHeader: PropTypes.func.isRequired,
+
+    /** Style to be applied to the list wrapper */
+    listWrapperStyle: stylePropTypes,
+
+    /** Reference to the emoji list */
+    forwardedRef: refPropTypes,
+
+    /** The data for the emoji list */
+    data: PropTypes.arrayOf(PropTypes.shape(emojiPropTypes)).isRequired,
+
+    /** Function to render each item in the list */
+    renderItem: PropTypes.func.isRequired,
+
+    /** Extra data to be passed to the list for re-rendering */
+    // eslint-disable-next-line react/forbid-prop-types
+    extraData: PropTypes.any,
+
+    /** Array of indices for the sticky headers */
+    stickyHeaderIndices: PropTypes.arrayOf(PropTypes.number),
+
+    /** Whether the list should always bounce vertically */
+    alwaysBounceVertical: PropTypes.bool,
+};
+
+const defaultProps = {
+    listWrapperStyle: [],
+    forwardedRef: () => {},
+    extraData: [],
+    stickyHeaderIndices: [],
+    alwaysBounceVertical: false,
+};
+
+/**
+ * Improves FlashList's recycling when there are different types of items
+ * @param {Object} item
+ * @returns {String}
+ */
+const getItemType = (item) => {
+    // item is undefined only when list is empty
+    if (!item) {
+        return;
+    }
+
+    if (item.name) {
+        return CONST.EMOJI_PICKER_ITEM_TYPES.EMOJI;
+    }
+    if (item.header) {
+        return CONST.EMOJI_PICKER_ITEM_TYPES.HEADER;
+    }
+
+    return CONST.EMOJI_PICKER_ITEM_TYPES.SPACER;
+};
+
+/**
+ * Return a unique key for each emoji item
+ *
+ * @param {Object} item
+ * @param {Number} index
+ * @returns {String}
+ */
+const keyExtractor = (item, index) => `emoji_picker_${item.code}_${index}`;
+
+/**
+ * Renders the list empty component
+ * @returns {React.Component}
+ */
+function ListEmptyComponent() {
+    const styles = useThemeStyles();
+    const {translate} = useLocalize();
+
+    return <Text style={[styles.textLabel, styles.colorMuted]}>{translate('common.noResultsFound')}</Text>;
+}
+
+function BaseEmojiPickerMenu({headerEmojis, scrollToHeader, isFiltered, listWrapperStyle, forwardedRef, data, renderItem, stickyHeaderIndices, extraData, alwaysBounceVertical}) {
+    const styles = useThemeStyles();
+    const {windowWidth, isSmallScreenWidth} = useWindowDimensions();
+
+    const flattenListWrapperStyle = useMemo(() => StyleSheet.flatten(listWrapperStyle), [listWrapperStyle]);
+
+    return (
+        <>
+            {!isFiltered && (
+                <CategoryShortcutBar
+                    headerEmojis={headerEmojis}
+                    onPress={scrollToHeader}
+                />
+            )}
+            <View style={listWrapperStyle}>
+                <FlashList
+                    ref={forwardedRef}
+                    keyboardShouldPersistTaps="handled"
+                    data={data}
+                    renderItem={renderItem}
+                    keyExtractor={keyExtractor}
+                    numColumns={CONST.EMOJI_NUM_PER_ROW}
+                    stickyHeaderIndices={stickyHeaderIndices}
+                    ListEmptyComponent={ListEmptyComponent}
+                    alwaysBounceVertical={alwaysBounceVertical}
+                    estimatedItemSize={CONST.EMOJI_PICKER_ITEM_HEIGHT}
+                    estimatedListSize={{height: flattenListWrapperStyle.height, width: isSmallScreenWidth ? windowWidth : CONST.EMOJI_PICKER_SIZE.WIDTH}}
+                    contentContainerStyle={styles.ph4}
+                    extraData={extraData}
+                    getItemType={getItemType}
+                />
+            </View>
+            <EmojiSkinToneList />
+        </>
+    );
+}
+
+BaseEmojiPickerMenu.propTypes = propTypes;
+BaseEmojiPickerMenu.defaultProps = defaultProps;
+BaseEmojiPickerMenu.displayName = 'BaseEmojiPickerMenu';
+
+const BaseEmojiPickerMenuWithRef = React.forwardRef((props, ref) => (
+    <BaseEmojiPickerMenu
+        // eslint-disable-next-line react/jsx-props-no-spreading
+        {...props}
+        forwardedRef={ref}
+    />
+));
+
+BaseEmojiPickerMenuWithRef.displayName = 'BaseEmojiPickerMenuWithRef';
+
+export default BaseEmojiPickerMenuWithRef;

src/components/EmojiPicker/EmojiPickerMenu/emojiPickerMenuPropTypes.js

@@ -0,0 +1,8 @@
+import PropTypes from 'prop-types';
+
+const emojiPickerMenuPropTypes = {
+    /** Function to add the selected emoji to the main compose text input */
+    onEmojiSelected: PropTypes.func.isRequired,
+};
+
+export default emojiPickerMenuPropTypes;