add on-device translation to post feed item

src/components/Post/Translated/index.tsx

@@ -1,13 +1,14 @@
 import {useMemo} from 'react'
 import {Platform, View} from 'react-native'
 import {msg} from '@lingui/core/macro'
-import {useLingui} from '@lingui/react'
-import {Trans} from '@lingui/react/macro'
+import {Trans, useLingui} from '@lingui/react/macro'
 
+import {HITSLOP_30} from '#/lib/constants'
 import {codeToLanguageName, languageName} from '#/locale/helpers'
 import {LANGUAGES} from '#/locale/languages'
 import {useLanguagePrefs} from '#/state/preferences'
-import {atoms as a, useTheme} from '#/alf'
+import {atoms as a, native, useTheme} from '#/alf'
+import {Button} from '#/components/Button'
 import {Loader} from '#/components/Loader'
 import * as Select from '#/components/Select'
 import {Text} from '#/components/Typography'
@@ -16,24 +17,43 @@ import {useTranslateOnDevice} from '#/translation'
 
 export function TranslatedPost({
   postText,
-  hideLoading = false,
+  standalone = false,
 }: {
   postText: string
-  hideLoading: boolean
+  /**
+   * Hides the loading state, and adds its own "hide translation button"
+   */
+  standalone?: boolean
 }) {
-  const {translationState} = useTranslateOnDevice()
+  const {translationState, clearTranslation} = useTranslateOnDevice()
+  const {t: l} = useLingui()
+  const t = useTheme()
 
-  if (translationState.status === 'loading' && !hideLoading) {
+  if (translationState.status === 'loading' && standalone) {
     return <TranslationLoading />
   }
 
   if (translationState.status === 'success') {
     return (
-      <TranslationResult
-        postText={postText}
-        sourceLanguage={translationState.sourceLanguage}
-        translatedText={translationState.translatedText}
-      />
+      <>
+        <TranslationResult
+          postText={postText}
+          sourceLanguage={translationState.sourceLanguage}
+          translatedText={translationState.translatedText}
+        />
+        {standalone && (
+          <Button
+            label={l`Hide translation`}
+            onPress={clearTranslation}
+            style={[a.self_start, a.mt_sm]}
+            hoverStyle={native({opacity: 0.5})}
+            hitSlop={HITSLOP_30}>
+            <Text style={[a.text_sm, {color: t.palette.primary_500}]}>
+              <Trans>Hide translation</Trans>
+            </Text>
+          </Button>
+        )}
+      </>
     )
   }
 
@@ -45,7 +65,7 @@ function TranslationLoading() {
 
   return (
     <View style={[a.flex_row, a.align_center, a.gap_sm, a.py_xs]}>
-      <Loader size="sm" />
+      <Loader size="xs" />
       <Text style={[a.text_sm, t.atoms.text_contrast_medium]}>
         <Trans>Translating…</Trans>
       </Text>

src/screens/PostThread/components/ThreadItemAnchor.tsx

@@ -420,7 +420,7 @@ const ThreadItemAnchorInner = memo(function ThreadItemAnchorInner({
                 shouldProxyLinks={true}
               />
             ) : undefined}
-            <TranslatedPost postText={record.text} hideLoading />
+            <TranslatedPost postText={record.text} />
             <TranslateLink post={item.value.post} />
             {post.embed && (
               <View style={[a.py_xs]}>
@@ -617,7 +617,7 @@ function TranslateLink({
   )
 
   return (
-    needsTranslation && (
+    (needsTranslation || translationState.status !== 'idle') && (
       <View style={[a.gap_md, a.pt_md, a.align_start]}>
         {translationState.status === 'loading' ? (
           <View style={[a.flex_row, a.align_center, a.gap_xs]}>

src/view/com/posts/PostFeedItem.tsx

@@ -42,12 +42,14 @@ import {Embed} from '#/components/Post/Embed'
 import {PostEmbedViewContext} from '#/components/Post/Embed/types'
 import {PostRepliedTo} from '#/components/Post/PostRepliedTo'
 import {ShowMoreTextButton} from '#/components/Post/ShowMoreTextButton'
+import {TranslatedPost} from '#/components/Post/Translated'
 import {PostControls} from '#/components/PostControls'
 import {DiscoverDebug} from '#/components/PostControls/DiscoverDebug'
 import {RichText} from '#/components/RichText'
 import {SubtleHover} from '#/components/SubtleHover'
 import {useAnalytics} from '#/analytics'
 import {useActorStatus} from '#/features/liveNow'
+import {Provider as OnDeviceTranslationProvider} from '#/translation'
 import * as bsky from '#/types/bsky'
 import {PostFeedReason} from './PostFeedReason'
 
@@ -108,27 +110,29 @@ export function PostFeedItem({
   }
   if (richText && moderation) {
     return (
-      <FeedItemInner
-        // Safeguard from clobbering per-post state below:
-        key={postShadowed.uri}
-        post={postShadowed}
-        record={record}
-        reason={reason}
-        feedContext={feedContext}
-        reqId={reqId}
-        richText={richText}
-        parentAuthor={parentAuthor}
-        showReplyTo={showReplyTo}
-        moderation={moderation}
-        isThreadChild={isThreadChild}
-        isThreadLastChild={isThreadLastChild}
-        isThreadParent={isThreadParent}
-        hideTopBorder={hideTopBorder}
-        isParentBlocked={isParentBlocked}
-        isParentNotFound={isParentNotFound}
-        rootPost={rootPost}
-        onShowLess={onShowLess}
-      />
+      <OnDeviceTranslationProvider>
+        <FeedItemInner
+          // Safeguard from clobbering per-post state below:
+          key={postShadowed.uri}
+          post={postShadowed}
+          record={record}
+          reason={reason}
+          feedContext={feedContext}
+          reqId={reqId}
+          richText={richText}
+          parentAuthor={parentAuthor}
+          showReplyTo={showReplyTo}
+          moderation={moderation}
+          isThreadChild={isThreadChild}
+          isThreadLastChild={isThreadLastChild}
+          isThreadParent={isThreadParent}
+          hideTopBorder={hideTopBorder}
+          isParentBlocked={isParentBlocked}
+          isParentNotFound={isParentNotFound}
+          rootPost={rootPost}
+          onShowLess={onShowLess}
+        />
+      </OnDeviceTranslationProvider>
     )
   }
   return null
@@ -479,6 +483,7 @@ let PostContent = ({
           {limitLines && (
             <ShowMoreTextButton style={[a.text_md]} onPress={onPressShowMore} />
           )}
+          <TranslatedPost postText={richText.text} standalone />
         </View>
       ) : undefined}
       {postEmbed ? (