Reduce <Text> nesting (#6615)

* Move isOnlyEmoji out of RichText

To fix Fast Refresh.

* Make renderChildrenWithEmoji work with any children

* Always go through UITextView for consistency

It already contains the `selectable` and `iOS` checks inside.

* Move `emoji` check into `renderChildrenWithEmoji`

* Remove unnecessary intermediate UITextView nodes

* Make childHasEmoji check recursive

It didn't handle nested arrays etc correctly before.

* Remove the "children must be string" limitation

Should not be necessary now that we correctly handle nested arrays etc.

* Fix unnecessary regex reallocation

This doesn't have a global flag so it's okay to reuse.

* Remove unnecessary <Text> wrapper in RichText

src/components/RichText.tsx

@@ -9,6 +9,7 @@ import {NavigationProp} from '#/lib/routes/types'
 import {toShortUrl} from '#/lib/strings/url-helpers'
 import {isNative} from '#/platform/detection'
 import {atoms as a, flatten, native, TextStyleProp, useTheme, web} from '#/alf'
+import {isOnlyEmoji} from '#/alf/typography'
 import {useInteractionState} from '#/components/hooks/useInteractionState'
 import {InlineLinkText, LinkProps} from '#/components/Link'
 import {ProfileHoverCard} from '#/components/ProfileHoverCard'
@@ -150,17 +151,14 @@ export function RichText({
         />,
       )
     } else {
-      els.push(
-        <Text key={key} emoji style={plainStyles}>
-          {segment.text}
-        </Text>,
-      )
+      els.push(segment.text)
     }
     key++
   }
 
   return (
     <Text
+      emoji
       selectable={selectable}
       testID={testID}
       style={plainStyles}
@@ -250,10 +248,3 @@ function RichTextTag({
     </React.Fragment>
   )
 }
-
-export function isOnlyEmoji(text: string) {
-  return (
-    text.length <= 15 &&
-    /^[\p{Emoji_Presentation}\p{Extended_Pictographic}]+$/u.test(text)
-  )
-}

src/components/Typography.tsx

@@ -1,11 +1,9 @@
 import {UITextView} from 'react-native-uitextview'
 
 import {logger} from '#/logger'
-import {isIOS} from '#/platform/detection'
 import {atoms, flatten, useAlf, useTheme, web} from '#/alf'
 import {
   childHasEmoji,
-  childIsString,
   normalizeTextStyles,
   renderChildrenWithEmoji,
   TextProps,
@@ -39,10 +37,6 @@ export function Text({
         `Text: emoji detected but emoji not enabled: "${children}"\n\nPlease add <Text emoji />'`,
       )
     }
-
-    if (emoji && !childIsString(children)) {
-      logger.error('Text: when <Text emoji />, children can only be strings.')
-    }
   }
 
   const shared = {
@@ -55,7 +49,7 @@ export function Text({
 
   return (
     <UITextView {...shared}>
-      {isIOS && emoji ? renderChildrenWithEmoji(children, shared) : children}
+      {renderChildrenWithEmoji(children, shared, emoji ?? false)}
     </UITextView>
   )
 }

src/components/dms/MessageItem.tsx

@@ -19,10 +19,11 @@ import {ConvoItem} from '#/state/messages/convo/types'
 import {useSession} from '#/state/session'
 import {TimeElapsed} from '#/view/com/util/TimeElapsed'
 import {atoms as a, useTheme} from '#/alf'
+import {isOnlyEmoji} from '#/alf/typography'
 import {ActionsWrapper} from '#/components/dms/ActionsWrapper'
 import {InlineLinkText} from '#/components/Link'
 import {Text} from '#/components/Typography'
-import {isOnlyEmoji, RichText} from '../RichText'
+import {RichText} from '../RichText'
 import {DateDivider} from './DateDivider'
 import {MessageItemEmbed} from './MessageItemEmbed'
 import {localDateString} from './util'