Machine translation of posts (#4307)

app/src/main/java/com/keylesspalace/tusky/AboutActivity.kt

@@ -55,7 +55,7 @@ class AboutActivity : BottomSheetActivity(), Injectable {
 
         lifecycleScope.launch {
             accountManager.activeAccount?.let { account ->
-                val instanceInfo = instanceInfoRepository.getInstanceInfo()
+                val instanceInfo = instanceInfoRepository.getUpdatedInstanceInfoOrFallback()
                 binding.accountInfo.text = getString(
                     R.string.about_account_info,
                     account.username,

app/src/main/java/com/keylesspalace/tusky/adapter/StatusBaseViewHolder.java

@@ -48,6 +48,7 @@ import com.keylesspalace.tusky.entity.Filter;
 import com.keylesspalace.tusky.entity.FilterResult;
 import com.keylesspalace.tusky.entity.HashTag;
 import com.keylesspalace.tusky.entity.Status;
+import com.keylesspalace.tusky.entity.Translation;
 import com.keylesspalace.tusky.interfaces.StatusActionListener;
 import com.keylesspalace.tusky.util.AbsoluteTimeFormatter;
 import com.keylesspalace.tusky.util.AttachmentHelper;
@@ -56,6 +57,7 @@ import com.keylesspalace.tusky.util.CompositeWithOpaqueBackground;
 import com.keylesspalace.tusky.util.CustomEmojiHelper;
 import com.keylesspalace.tusky.util.ImageLoadingHelper;
 import com.keylesspalace.tusky.util.LinkHelper;
+import com.keylesspalace.tusky.util.LocaleUtilsKt;
 import com.keylesspalace.tusky.util.NumberUtils;
 import com.keylesspalace.tusky.util.StatusDisplayOptions;
 import com.keylesspalace.tusky.util.TimestampUtils;
@@ -66,11 +68,13 @@ import com.keylesspalace.tusky.viewdata.PollOptionViewData;
 import com.keylesspalace.tusky.viewdata.PollViewData;
 import com.keylesspalace.tusky.viewdata.PollViewDataKt;
 import com.keylesspalace.tusky.viewdata.StatusViewData;
+import com.keylesspalace.tusky.viewdata.TranslationViewData;
 
 import java.text.NumberFormat;
 import java.util.Collections;
 import java.util.Date;
 import java.util.List;
+import java.util.Locale;
 
 import at.connyduck.sparkbutton.SparkButton;
 import at.connyduck.sparkbutton.helpers.Utils;
@@ -120,6 +124,9 @@ public abstract class StatusBaseViewHolder extends RecyclerView.ViewHolder {
     protected final TextView filteredPlaceholderLabel;
     protected final Button filteredPlaceholderShowButton;
     protected final ConstraintLayout statusContainer;
+    private final TextView translationStatusView;
+    private final Button untranslateButton;
+
 
     private final NumberFormat numberFormat = NumberFormat.getNumberInstance();
     private final AbsoluteTimeFormatter absoluteTimeFormatter = new AbsoluteTimeFormatter();
@@ -182,6 +189,9 @@ public abstract class StatusBaseViewHolder extends RecyclerView.ViewHolder {
         pollOptions.setLayoutManager(new LinearLayoutManager(pollOptions.getContext()));
         ((DefaultItemAnimator) pollOptions.getItemAnimator()).setSupportsChangeAnimations(false);
 
+        translationStatusView = itemView.findViewById(R.id.status_translation_status);
+        untranslateButton = itemView.findViewById(R.id.status_button_untranslate);
+
         this.avatarRadius48dp = itemView.getContext().getResources().getDimensionPixelSize(R.dimen.avatar_radius_48dp);
         this.avatarRadius36dp = itemView.getContext().getResources().getDimensionPixelSize(R.dimen.avatar_radius_36dp);
         this.avatarRadius24dp = itemView.getContext().getResources().getDimensionPixelSize(R.dimen.avatar_radius_24dp);
@@ -213,7 +223,7 @@ public abstract class StatusBaseViewHolder extends RecyclerView.ViewHolder {
                                         final @NonNull StatusActionListener listener) {
 
         Status actionable = status.getActionable();
-        String spoilerText = actionable.getSpoilerText();
+        String spoilerText = status.getSpoilerText();
         List<Emoji> emojis = actionable.getEmojis();
 
         boolean sensitive = !TextUtils.isEmpty(spoilerText);
@@ -273,7 +283,7 @@ public abstract class StatusBaseViewHolder extends RecyclerView.ViewHolder {
         List<Status.Mention> mentions = actionable.getMentions();
         List<HashTag> tags = actionable.getTags();
         List<Emoji> emojis = actionable.getEmojis();
-        PollViewData poll = PollViewDataKt.toViewData(actionable.getPoll());
+        PollViewData poll = PollViewDataKt.toViewData(status.getPoll());
 
         if (expanded) {
             CharSequence emojifiedText = CustomEmojiHelper.emojify(content, emojis, this.content, statusDisplayOptions.animateEmojis());
@@ -779,7 +789,7 @@ public abstract class StatusBaseViewHolder extends RecyclerView.ViewHolder {
             setReblogged(actionable.getReblogged());
             setFavourited(actionable.getFavourited());
             setBookmarked(actionable.getBookmarked());
-            List<Attachment> attachments = actionable.getAttachments();
+            List<Attachment> attachments = status.getAttachments();
             boolean sensitive = actionable.getSensitive();
             if (statusDisplayOptions.mediaPreviewEnabled() && hasPreviewableAttachment(attachments)) {
                 setMediaPreviews(attachments, sensitive, listener, status.isShowingContent(), statusDisplayOptions.useBlurhash());
@@ -802,6 +812,9 @@ public abstract class StatusBaseViewHolder extends RecyclerView.ViewHolder {
 
             setupButtons(listener, actionable.getAccount().getId(), status.getContent().toString(),
                 statusDisplayOptions);
+
+            setTranslationStatus(status, listener);
+
             setRebloggingEnabled(actionable.rebloggingAllowed(), actionable.getVisibility());
 
             setSpoilerAndContent(status, statusDisplayOptions, listener);
@@ -827,6 +840,29 @@ public abstract class StatusBaseViewHolder extends RecyclerView.ViewHolder {
         }
     }
 
+    private void setTranslationStatus(StatusViewData.Concrete status, StatusActionListener listener) {
+        var translationViewData = status.getTranslation();
+        if (translationViewData != null) {
+            if (translationViewData instanceof TranslationViewData.Loaded) {
+                Translation translation = ((TranslationViewData.Loaded) translationViewData).getData();
+                translationStatusView.setVisibility(View.VISIBLE);
+                var langName = LocaleUtilsKt.localeNameForUntrustedISO639LangCode(translation.getDetectedSourceLanguage());
+                translationStatusView.setText(translationStatusView.getContext().getString(R.string.label_translated, langName, translation.getProvider()));
+                untranslateButton.setVisibility(View.VISIBLE);
+                untranslateButton.setOnClickListener((v) -> listener.onUntranslate(getBindingAdapterPosition()));
+            } else {
+                translationStatusView.setVisibility(View.VISIBLE);
+                translationStatusView.setText(R.string.label_translating);
+                untranslateButton.setVisibility(View.GONE);
+                untranslateButton.setOnClickListener(null);
+            }
+        } else {
+            translationStatusView.setVisibility(View.GONE);
+            untranslateButton.setVisibility(View.GONE);
+            untranslateButton.setOnClickListener(null);
+        }
+    }
+
     private void setupFilterPlaceholder(StatusViewData.Concrete status, StatusActionListener listener, StatusDisplayOptions displayOptions) {
         if (status.getFilterAction() != Filter.Action.WARN) {
             showFilteredPlaceholder(false);
@@ -864,27 +900,57 @@ public abstract class StatusBaseViewHolder extends RecyclerView.ViewHolder {
         Status actionable = status.getActionable();
 
         String description = context.getString(R.string.description_status,
+            // 1 display_name
             actionable.getAccount().getDisplayName(),
+            // 2 CW?
             getContentWarningDescription(context, status),
-            (TextUtils.isEmpty(actionable.getSpoilerText()) || !actionable.getSensitive() || status.isExpanded() ? status.getContent() : ""),
+            // 3 content?
+            (TextUtils.isEmpty(status.getSpoilerText()) || !actionable.getSensitive() || status.isExpanded() ? status.getContent() : ""),
+            // 4 date
             getCreatedAtDescription(actionable.getCreatedAt(), statusDisplayOptions),
+            // 5 edited?
             actionable.getEditedAt() != null ? context.getString(R.string.description_post_edited) : "",
+            // 6 reposted_by?
             getReblogDescription(context, status),
+            // 7 username
             actionable.getAccount().getUsername(),
+            // 8 reposted
             actionable.getReblogged() ? context.getString(R.string.description_post_reblogged) : "",
+            // 9 favorited
             actionable.getFavourited() ? context.getString(R.string.description_post_favourited) : "",
+            // 10 bookmarked
             actionable.getBookmarked() ? context.getString(R.string.description_post_bookmarked) : "",
+            // 11 media
             getMediaDescription(context, status),
+            // 12 visibility
             getVisibilityDescription(context, actionable.getVisibility()),
+            // 13 fav_number
             getFavsText(context, actionable.getFavouritesCount()),
+            // 14 reblog_number
             getReblogsText(context, actionable.getReblogsCount()),
-            getPollDescription(status, context, statusDisplayOptions)
+            // 15 poll?
+            getPollDescription(status, context, statusDisplayOptions),
+            // 16 translated?
+            getTranslatedDescription(context, status.getTranslation())
         );
         itemView.setContentDescription(description);
     }
 
+    private String getTranslatedDescription(Context context, TranslationViewData translationViewData) {
+        if (translationViewData == null) {
+            return "";
+        } else if (translationViewData instanceof TranslationViewData.Loading) {
+            return context.getString(R.string.label_translating);
+        } else {
+            Translation translation = ((TranslationViewData.Loaded) translationViewData).getData();
+            var langName = LocaleUtilsKt.localeNameForUntrustedISO639LangCode(translation.getDetectedSourceLanguage());
+            return context.getString(R.string.label_translated, langName, translation.getProvider());
+        }
+    }
+
     private static CharSequence getReblogDescription(Context context,
                                                      @NonNull StatusViewData.Concrete status) {
+        @Nullable
         Status reblog = status.getRebloggingStatus();
         if (reblog != null) {
             return context
@@ -895,12 +961,12 @@ public abstract class StatusBaseViewHolder extends RecyclerView.ViewHolder {
     }
 
     private static CharSequence getMediaDescription(Context context,
-                                                    @NonNull StatusViewData.Concrete status) {
+                                                    @NonNull StatusViewData.Concrete viewData) {
-        if (status.getActionable().getAttachments().isEmpty()) {
+        if (viewData.getAttachments().isEmpty()) {
             return "";
         }
         StringBuilder mediaDescriptions = CollectionsKt.fold(
-            status.getActionable().getAttachments(),
+            viewData.getAttachments(),
             new StringBuilder(),
             (builder, a) -> {
                 if (a.getDescription() == null) {
@@ -917,8 +983,8 @@ public abstract class StatusBaseViewHolder extends RecyclerView.ViewHolder {
 
     private static CharSequence getContentWarningDescription(Context context,
                                                              @NonNull StatusViewData.Concrete status) {
-        if (!TextUtils.isEmpty(status.getActionable().getSpoilerText())) {
+        if (!TextUtils.isEmpty(status.getSpoilerText())) {
-            return context.getString(R.string.description_post_cw, status.getActionable().getSpoilerText());
+            return context.getString(R.string.description_post_cw, status.getSpoilerText());
         } else {
             return "";
         }
@@ -954,7 +1020,7 @@ public abstract class StatusBaseViewHolder extends RecyclerView.ViewHolder {
     private CharSequence getPollDescription(@NonNull StatusViewData.Concrete status,
                                             Context context,
                                             StatusDisplayOptions statusDisplayOptions) {
-        PollViewData poll = PollViewDataKt.toViewData(status.getActionable().getPoll());
+        PollViewData poll = PollViewDataKt.toViewData(status.getPoll());
         if (poll == null) {
             return "";
         } else {
@@ -981,7 +1047,7 @@ public abstract class StatusBaseViewHolder extends RecyclerView.ViewHolder {
     }
 
     @NonNull
-    protected CharSequence getReblogsText   (@NonNull Context context, int count) {
+    protected CharSequence getReblogsText(@NonNull Context context, int count) {
         String countString = numberFormat.format(count);
         return HtmlCompat.fromHtml(context.getResources().getQuantityString(R.plurals.reblogs, count, countString), HtmlCompat.FROM_HTML_MODE_LEGACY);
     }

app/src/main/java/com/keylesspalace/tusky/adapter/StatusDetailedViewHolder.java

@@ -9,11 +9,13 @@ import android.text.method.LinkMovementMethod;
 import android.text.style.DynamicDrawableSpan;
 import android.text.style.ImageSpan;
 import android.view.View;
+import android.widget.Button;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.appcompat.content.res.AppCompatResources;
+import androidx.appcompat.widget.ViewUtils;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.keylesspalace.tusky.R;
@@ -23,6 +25,7 @@ import com.keylesspalace.tusky.util.CardViewMode;
 import com.keylesspalace.tusky.util.LinkHelper;
 import com.keylesspalace.tusky.util.NoUnderlineURLSpan;
 import com.keylesspalace.tusky.util.StatusDisplayOptions;
+import com.keylesspalace.tusky.util.ViewExtensionsKt;
 import com.keylesspalace.tusky.viewdata.StatusViewData;
 
 import java.text.DateFormat;

app/src/main/java/com/keylesspalace/tusky/components/compose/ComposeViewModel.kt

@@ -80,7 +80,7 @@ class ComposeViewModel @Inject constructor(
     private var currentContent: String? = ""
     private var currentContentWarning: String? = ""
 
-    val instanceInfo: SharedFlow<InstanceInfo> = instanceInfoRepo::getInstanceInfo.asFlow()
+    val instanceInfo: SharedFlow<InstanceInfo> = instanceInfoRepo::getUpdatedInstanceInfoOrFallback.asFlow()
         .shareIn(viewModelScope, SharingStarted.Eagerly, replay = 1)
 
     val emoji: SharedFlow<List<Emoji>> = instanceInfoRepo::getEmojis.asFlow()

app/src/main/java/com/keylesspalace/tusky/components/conversation/ConversationsFragment.kt

@@ -136,7 +136,11 @@ class ConversationsFragment :
 
             if (loadState.isAnyLoading()) {
                 lifecycleScope.launch {
-                    eventHub.dispatch(ConversationsLoadingEvent(accountManager.activeAccount?.accountId ?: ""))
+                    eventHub.dispatch(
+                        ConversationsLoadingEvent(
+                            accountManager.activeAccount?.accountId ?: ""
+                        )
+                    )
                 }
             }
 
@@ -153,12 +157,14 @@ class ConversationsFragment :
                             binding.statusView.showHelp(R.string.help_empty_conversations)
                         }
                     }
+
                     is LoadState.Error -> {
                         binding.statusView.show()
                         binding.statusView.setup(
                             (loadState.refresh as LoadState.Error).error
                         ) { refreshContent() }
                     }
+
                     is LoadState.Loading -> {
                         binding.progressBar.show()
                     }
@@ -242,6 +248,7 @@ class ConversationsFragment :
                 refreshContent()
                 true
             }
+
             else -> false
         }
     }
@@ -256,7 +263,8 @@ class ConversationsFragment :
 
         (binding.recyclerView.itemAnimator as SimpleItemAnimator).supportsChangeAnimations = false
 
-        binding.recyclerView.adapter = adapter.withLoadStateFooter(ConversationLoadStateAdapter(adapter::retry))
+        binding.recyclerView.adapter =
+            adapter.withLoadStateFooter(ConversationLoadStateAdapter(adapter::retry))
     }
 
     private fun refreshContent() {
@@ -284,6 +292,8 @@ class ConversationsFragment :
         }
     }
 
+    override val onMoreTranslate: ((translate: Boolean, position: Int) -> Unit)? = null
+
     override fun onMore(view: View, position: Int) {
         adapter.peek(position)?.let { conversation ->
 
@@ -386,6 +396,10 @@ class ConversationsFragment :
         }
     }
 
+    override fun onUntranslate(position: Int) {
+        // not needed
+    }
+
     private fun deleteConversation(conversation: ConversationViewData) {
         AlertDialog.Builder(requireContext())
             .setMessage(R.string.dialog_delete_conversation_warning)
@@ -402,6 +416,7 @@ class ConversationsFragment :
             PrefKeys.FAB_HIDE -> {
                 hideFab = sharedPreferences.getBoolean(PrefKeys.FAB_HIDE, false)
             }
+
             PrefKeys.MEDIA_PREVIEW_ENABLED -> {
                 val enabled = accountManager.activeAccount!!.mediaPreviewEnabled
                 val oldMediaPreviewEnabled = adapter.mediaPreviewEnabled

app/src/main/java/com/keylesspalace/tusky/components/instanceinfo/InstanceInfo.kt

@@ -29,5 +29,6 @@ data class InstanceInfo(
     val maxFields: Int,
     val maxFieldNameLength: Int?,
     val maxFieldValueLength: Int?,
-    val version: String?
+    val version: String?,
+    val translationEnabled: Boolean?,
 )

app/src/main/java/com/keylesspalace/tusky/components/instanceinfo/InstanceInfoRepository.kt

@@ -16,28 +16,64 @@
 package com.keylesspalace.tusky.components.instanceinfo
 
 import android.util.Log
-import at.connyduck.calladapter.networkresult.fold
+import at.connyduck.calladapter.networkresult.NetworkResult
 import at.connyduck.calladapter.networkresult.getOrElse
+import at.connyduck.calladapter.networkresult.getOrThrow
+import at.connyduck.calladapter.networkresult.map
 import at.connyduck.calladapter.networkresult.onSuccess
+import at.connyduck.calladapter.networkresult.recover
 import com.keylesspalace.tusky.db.AccountManager
 import com.keylesspalace.tusky.db.AppDatabase
 import com.keylesspalace.tusky.db.EmojisEntity
 import com.keylesspalace.tusky.db.InstanceInfoEntity
+import com.keylesspalace.tusky.di.ApplicationScope
 import com.keylesspalace.tusky.entity.Emoji
+import com.keylesspalace.tusky.entity.Instance
+import com.keylesspalace.tusky.entity.InstanceV1
 import com.keylesspalace.tusky.network.MastodonApi
 import com.keylesspalace.tusky.util.isHttpNotFound
+import java.util.concurrent.ConcurrentHashMap
 import javax.inject.Inject
+import javax.inject.Singleton
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 
+@Singleton
 class InstanceInfoRepository @Inject constructor(
     private val api: MastodonApi,
     db: AppDatabase,
-    accountManager: AccountManager
+    private val accountManager: AccountManager,
+    @ApplicationScope
+    private val externalScope: CoroutineScope
 ) {
-
     private val dao = db.instanceDao()
-    private val instanceName = accountManager.activeAccount!!.domain
+    private val instanceName
+        get() = accountManager.activeAccount!!.domain
+
+    /** In-memory cache for instance data, per instance domain.  */
+    private var instanceInfoCache = ConcurrentHashMap<String, InstanceInfo>()
+
+    fun precache() {
+        // We are avoiding some duplicate work but we are not trying too hard.
+        // We might request it multiple times in parallel which is not a big problem.
+        // We might also get the results in random order or write them twice but it's also
+        // not a problem.
+        // We are just trying to avoid 2 things:
+        //  - fetching it when we already have it
+        //  - caching default value (we want to rather re-fetch if it fails)
+        if (instanceInfoCache[instanceName] == null) {
+            externalScope.launch {
+                fetchAndPersistInstanceInfo().onSuccess { fetched ->
+                    instanceInfoCache[fetched.instance] = fetched.toInfoOrDefault()
+                }
+            }
+        }
+    }
+
+    val cachedInstanceInfoOrFallback: InstanceInfo
+        get() = instanceInfoCache[instanceName] ?: null.toInfoOrDefault()
 
     /**
      * Returns the custom emojis of the instance.
@@ -58,97 +94,114 @@ class InstanceInfoRepository @Inject constructor(
      * Will always try to fetch the most up-to-date data from the api, falls back to cache in case it is not available.
      * Never throws, returns defaults of vanilla Mastodon in case of error.
      */
-    suspend fun getInstanceInfo(): InstanceInfo = withContext(Dispatchers.IO) {
+    suspend fun getUpdatedInstanceInfoOrFallback(): InstanceInfo =
-        api.getInstance()
+        withContext(Dispatchers.IO) {
-            .fold(
+            fetchAndPersistInstanceInfo()
-                { instance ->
+                .getOrElse { throwable ->
-                    val instanceEntity = InstanceInfoEntity(
-                        instance = instanceName,
-                        maximumTootCharacters = instance.configuration?.statuses?.maxCharacters ?: DEFAULT_CHARACTER_LIMIT,
-                        maxPollOptions = instance.configuration?.polls?.maxOptions ?: DEFAULT_MAX_OPTION_COUNT,
-                        maxPollOptionLength = instance.configuration?.polls?.maxCharactersPerOption ?: DEFAULT_MAX_OPTION_LENGTH,
-                        minPollDuration = instance.configuration?.polls?.minExpirationSeconds ?: DEFAULT_MIN_POLL_DURATION,
-                        maxPollDuration = instance.configuration?.polls?.maxExpirationSeconds ?: DEFAULT_MAX_POLL_DURATION,
-                        charactersReservedPerUrl = instance.configuration?.statuses?.charactersReservedPerUrl ?: DEFAULT_CHARACTERS_RESERVED_PER_URL,
-                        version = instance.version,
-                        videoSizeLimit = instance.configuration?.mediaAttachments?.videoSizeLimitBytes?.toInt() ?: DEFAULT_VIDEO_SIZE_LIMIT,
-                        imageSizeLimit = instance.configuration?.mediaAttachments?.imageSizeLimitBytes?.toInt() ?: DEFAULT_IMAGE_SIZE_LIMIT,
-                        imageMatrixLimit = instance.configuration?.mediaAttachments?.imagePixelCountLimit?.toInt() ?: DEFAULT_IMAGE_MATRIX_LIMIT,
-                        maxMediaAttachments = instance.configuration?.statuses?.maxMediaAttachments ?: DEFAULT_MAX_MEDIA_ATTACHMENTS,
-                        maxFields = instance.pleroma?.metadata?.fieldLimits?.maxFields,
-                        maxFieldNameLength = instance.pleroma?.metadata?.fieldLimits?.nameLength,
-                        maxFieldValueLength = instance.pleroma?.metadata?.fieldLimits?.valueLength
-                    )
-                    dao.upsert(instanceEntity)
-                    instanceEntity
-                },
-                { throwable ->
-                    if (throwable.isHttpNotFound()) {
-                        getInstanceInfoV1()
-                    } else {
-                        Log.w(
-                            TAG,
-                            "failed to instance, falling back to cache and default values",
-                            throwable
-                        )
-                        dao.getInstanceInfo(instanceName)
-                    }
-                }
-            ).let { instanceInfo: InstanceInfoEntity? ->
-                InstanceInfo(
-                    maxChars = instanceInfo?.maximumTootCharacters ?: DEFAULT_CHARACTER_LIMIT,
-                    pollMaxOptions = instanceInfo?.maxPollOptions ?: DEFAULT_MAX_OPTION_COUNT,
-                    pollMaxLength = instanceInfo?.maxPollOptionLength ?: DEFAULT_MAX_OPTION_LENGTH,
-                    pollMinDuration = instanceInfo?.minPollDuration ?: DEFAULT_MIN_POLL_DURATION,
-                    pollMaxDuration = instanceInfo?.maxPollDuration ?: DEFAULT_MAX_POLL_DURATION,
-                    charactersReservedPerUrl = instanceInfo?.charactersReservedPerUrl ?: DEFAULT_CHARACTERS_RESERVED_PER_URL,
-                    videoSizeLimit = instanceInfo?.videoSizeLimit ?: DEFAULT_VIDEO_SIZE_LIMIT,
-                    imageSizeLimit = instanceInfo?.imageSizeLimit ?: DEFAULT_IMAGE_SIZE_LIMIT,
-                    imageMatrixLimit = instanceInfo?.imageMatrixLimit ?: DEFAULT_IMAGE_MATRIX_LIMIT,
-                    maxMediaAttachments = instanceInfo?.maxMediaAttachments ?: DEFAULT_MAX_MEDIA_ATTACHMENTS,
-                    maxFields = instanceInfo?.maxFields ?: DEFAULT_MAX_ACCOUNT_FIELDS,
-                    maxFieldNameLength = instanceInfo?.maxFieldNameLength,
-                    maxFieldValueLength = instanceInfo?.maxFieldValueLength,
-                    version = instanceInfo?.version
-                )
-            }
-    }
-
-    private suspend fun getInstanceInfoV1(): InstanceInfoEntity? = withContext(Dispatchers.IO) {
-        api.getInstanceV1()
-            .fold(
-                { instance ->
-                    val instanceEntity = InstanceInfoEntity(
-                        instance = instanceName,
-                        maximumTootCharacters = instance.configuration?.statuses?.maxCharacters ?: instance.maxTootChars,
-                        maxPollOptions = instance.configuration?.polls?.maxOptions ?: instance.pollConfiguration?.maxOptions,
-                        maxPollOptionLength = instance.configuration?.polls?.maxCharactersPerOption ?: instance.pollConfiguration?.maxOptionChars,
-                        minPollDuration = instance.configuration?.polls?.minExpiration ?: instance.pollConfiguration?.minExpiration,
-                        maxPollDuration = instance.configuration?.polls?.maxExpiration ?: instance.pollConfiguration?.maxExpiration,
-                        charactersReservedPerUrl = instance.configuration?.statuses?.charactersReservedPerUrl,
-                        version = instance.version,
-                        videoSizeLimit = instance.configuration?.mediaAttachments?.videoSizeLimit ?: instance.uploadLimit,
-                        imageSizeLimit = instance.configuration?.mediaAttachments?.imageSizeLimit ?: instance.uploadLimit,
-                        imageMatrixLimit = instance.configuration?.mediaAttachments?.imageMatrixLimit,
-                        maxMediaAttachments = instance.configuration?.statuses?.maxMediaAttachments ?: instance.maxMediaAttachments,
-                        maxFields = instance.pleroma?.metadata?.fieldLimits?.maxFields,
-                        maxFieldNameLength = instance.pleroma?.metadata?.fieldLimits?.nameLength,
-                        maxFieldValueLength = instance.pleroma?.metadata?.fieldLimits?.valueLength
-                    )
-                    dao.upsert(instanceEntity)
-                    instanceEntity
-                },
-                { throwable ->
                     Log.w(
                         TAG,
-                        "failed to instance, falling back to cache and default values",
+                        "failed to load instance, falling back to cache and default values",
                         throwable
                     )
                     dao.getInstanceInfo(instanceName)
                 }
-            )
+        }.toInfoOrDefault()
+
+    private suspend fun InstanceInfoRepository.fetchAndPersistInstanceInfo(): NetworkResult<InstanceInfoEntity> =
+        fetchRemoteInstanceInfo()
+            .onSuccess { instanceInfoEntity ->
+                dao.upsert(instanceInfoEntity)
+            }
+
+    private suspend fun fetchRemoteInstanceInfo(): NetworkResult<InstanceInfoEntity> {
+        val instance = this.instanceName
+        return api.getInstance()
+            .map { it.toEntity() }
+            .recover { t ->
+                if (t.isHttpNotFound()) {
+                    api.getInstanceV1().map { it.toEntity(instance) }.getOrThrow()
+                } else {
+                    throw t
+                }
+            }
     }
 
+    private fun InstanceInfoEntity?.toInfoOrDefault() = InstanceInfo(
+        maxChars = this?.maximumTootCharacters ?: DEFAULT_CHARACTER_LIMIT,
+        pollMaxOptions = this?.maxPollOptions ?: DEFAULT_MAX_OPTION_COUNT,
+        pollMaxLength = this?.maxPollOptionLength ?: DEFAULT_MAX_OPTION_LENGTH,
+        pollMinDuration = this?.minPollDuration ?: DEFAULT_MIN_POLL_DURATION,
+        pollMaxDuration = this?.maxPollDuration ?: DEFAULT_MAX_POLL_DURATION,
+        charactersReservedPerUrl = this?.charactersReservedPerUrl
+            ?: DEFAULT_CHARACTERS_RESERVED_PER_URL,
+        videoSizeLimit = this?.videoSizeLimit ?: DEFAULT_VIDEO_SIZE_LIMIT,
+        imageSizeLimit = this?.imageSizeLimit ?: DEFAULT_IMAGE_SIZE_LIMIT,
+        imageMatrixLimit = this?.imageMatrixLimit ?: DEFAULT_IMAGE_MATRIX_LIMIT,
+        maxMediaAttachments = this?.maxMediaAttachments
+            ?: DEFAULT_MAX_MEDIA_ATTACHMENTS,
+        maxFields = this?.maxFields ?: DEFAULT_MAX_ACCOUNT_FIELDS,
+        maxFieldNameLength = this?.maxFieldNameLength,
+        maxFieldValueLength = this?.maxFieldValueLength,
+        version = this?.version,
+        translationEnabled = this?.translationEnabled
+    )
+
+    private fun Instance.toEntity() = InstanceInfoEntity(
+        instance = domain,
+        maximumTootCharacters = this.configuration?.statuses?.maxCharacters
+            ?: DEFAULT_CHARACTER_LIMIT,
+        maxPollOptions = this.configuration?.polls?.maxOptions ?: DEFAULT_MAX_OPTION_COUNT,
+        maxPollOptionLength = this.configuration?.polls?.maxCharactersPerOption
+            ?: DEFAULT_MAX_OPTION_LENGTH,
+        minPollDuration = this.configuration?.polls?.minExpirationSeconds
+            ?: DEFAULT_MIN_POLL_DURATION,
+        maxPollDuration = this.configuration?.polls?.maxExpirationSeconds
+            ?: DEFAULT_MAX_POLL_DURATION,
+        charactersReservedPerUrl = this.configuration?.statuses?.charactersReservedPerUrl
+            ?: DEFAULT_CHARACTERS_RESERVED_PER_URL,
+        version = this.version,
+        videoSizeLimit = this.configuration?.mediaAttachments?.videoSizeLimitBytes?.toInt()
+            ?: DEFAULT_VIDEO_SIZE_LIMIT,
+        imageSizeLimit = this.configuration?.mediaAttachments?.imageSizeLimitBytes?.toInt()
+            ?: DEFAULT_IMAGE_SIZE_LIMIT,
+        imageMatrixLimit = this.configuration?.mediaAttachments?.imagePixelCountLimit?.toInt()
+            ?: DEFAULT_IMAGE_MATRIX_LIMIT,
+        maxMediaAttachments = this.configuration?.statuses?.maxMediaAttachments
+            ?: DEFAULT_MAX_MEDIA_ATTACHMENTS,
+        maxFields = this.pleroma?.metadata?.fieldLimits?.maxFields,
+        maxFieldNameLength = this.pleroma?.metadata?.fieldLimits?.nameLength,
+        maxFieldValueLength = this.pleroma?.metadata?.fieldLimits?.valueLength,
+        translationEnabled = this.configuration?.translation?.enabled
+    )
+
+    private fun InstanceV1.toEntity(instanceName: String) =
+        InstanceInfoEntity(
+            instance = instanceName,
+            maximumTootCharacters = this.configuration?.statuses?.maxCharacters
+                ?: this.maxTootChars,
+            maxPollOptions = this.configuration?.polls?.maxOptions
+                ?: this.pollConfiguration?.maxOptions,
+            maxPollOptionLength = this.configuration?.polls?.maxCharactersPerOption
+                ?: this.pollConfiguration?.maxOptionChars,
+            minPollDuration = this.configuration?.polls?.minExpiration
+                ?: this.pollConfiguration?.minExpiration,
+            maxPollDuration = this.configuration?.polls?.maxExpiration
+                ?: this.pollConfiguration?.maxExpiration,
+            charactersReservedPerUrl = this.configuration?.statuses?.charactersReservedPerUrl,
+            version = this.version,
+            videoSizeLimit = this.configuration?.mediaAttachments?.videoSizeLimit
+                ?: this.uploadLimit,
+            imageSizeLimit = this.configuration?.mediaAttachments?.imageSizeLimit
+                ?: this.uploadLimit,
+            imageMatrixLimit = this.configuration?.mediaAttachments?.imageMatrixLimit,
+            maxMediaAttachments = this.configuration?.statuses?.maxMediaAttachments
+                ?: this.maxMediaAttachments,
+            maxFields = this.pleroma?.metadata?.fieldLimits?.maxFields,
+            maxFieldNameLength = this.pleroma?.metadata?.fieldLimits?.nameLength,
+            maxFieldValueLength = this.pleroma?.metadata?.fieldLimits?.valueLength,
+            translationEnabled = null,
+        )
+
     companion object {
         private const val TAG = "InstanceInfoRepo"
 

app/src/main/java/com/keylesspalace/tusky/components/search/SearchViewModel.kt

@@ -23,7 +23,9 @@ import androidx.paging.PagingConfig
 import androidx.paging.cachedIn
 import at.connyduck.calladapter.networkresult.NetworkResult
 import at.connyduck.calladapter.networkresult.fold
+import at.connyduck.calladapter.networkresult.map
 import at.connyduck.calladapter.networkresult.onFailure
+import com.keylesspalace.tusky.components.instanceinfo.InstanceInfoRepository
 import com.keylesspalace.tusky.components.search.adapter.SearchPagingSourceFactory
 import com.keylesspalace.tusky.db.AccountEntity
 import com.keylesspalace.tusky.db.AccountManager
@@ -33,6 +35,7 @@ import com.keylesspalace.tusky.network.MastodonApi
 import com.keylesspalace.tusky.usecase.TimelineCases
 import com.keylesspalace.tusky.util.toViewData
 import com.keylesspalace.tusky.viewdata.StatusViewData
+import com.keylesspalace.tusky.viewdata.TranslationViewData
 import javax.inject.Inject
 import kotlinx.coroutines.Deferred
 import kotlinx.coroutines.async
@@ -41,9 +44,14 @@ import kotlinx.coroutines.launch
 class SearchViewModel @Inject constructor(
     mastodonApi: MastodonApi,
     private val timelineCases: TimelineCases,
-    private val accountManager: AccountManager
+    private val accountManager: AccountManager,
+    private val instanceInfoRepository: InstanceInfoRepository,
 ) : ViewModel() {
 
+    init {
+        instanceInfoRepository.precache()
+    }
+
     var currentQuery: String = ""
     var currentSearchFieldContent: String? = null
 
@@ -193,6 +201,30 @@ class SearchViewModel @Inject constructor(
         }
     }
 
+    fun supportsTranslation(): Boolean =
+        instanceInfoRepository.cachedInstanceInfoOrFallback.translationEnabled == true
+
+    suspend fun translate(statusViewData: StatusViewData.Concrete): NetworkResult<Unit> {
+        updateStatusViewData(statusViewData.copy(translation = TranslationViewData.Loading))
+        return timelineCases.translate(statusViewData.actionableId)
+            .map { translation ->
+                updateStatusViewData(
+                    statusViewData.copy(
+                        translation = TranslationViewData.Loaded(
+                            translation
+                        )
+                    )
+                )
+            }
+            .onFailure {
+                updateStatusViewData(statusViewData.copy(translation = null))
+            }
+    }
+
+    fun untranslate(statusViewData: StatusViewData.Concrete) {
+        updateStatusViewData(statusViewData.copy(translation = null))
+    }
+
     private fun updateStatusViewData(newStatusViewData: StatusViewData.Concrete) {
         val idx = loadedStatuses.indexOfFirst { it.id == newStatusViewData.id }
         if (idx >= 0) {

app/src/main/java/com/keylesspalace/tusky/components/search/fragments/SearchStatusesFragment.kt

@@ -39,6 +39,7 @@ import androidx.preference.PreferenceManager
 import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.LinearLayoutManager
 import at.connyduck.calladapter.networkresult.fold
+import at.connyduck.calladapter.networkresult.onFailure
 import com.google.android.material.snackbar.Snackbar
 import com.keylesspalace.tusky.BaseActivity
 import com.keylesspalace.tusky.R
@@ -56,12 +57,14 @@ import com.keylesspalace.tusky.interfaces.AccountSelectionListener
 import com.keylesspalace.tusky.interfaces.StatusActionListener
 import com.keylesspalace.tusky.settings.PrefKeys
 import com.keylesspalace.tusky.util.CardViewMode
+import com.keylesspalace.tusky.util.ListStatusAccessibilityDelegate
 import com.keylesspalace.tusky.util.StatusDisplayOptions
 import com.keylesspalace.tusky.util.openLink
 import com.keylesspalace.tusky.util.startActivityWithSlideInAnimation
 import com.keylesspalace.tusky.view.showMuteAccountDialog
 import com.keylesspalace.tusky.viewdata.AttachmentViewData
 import com.keylesspalace.tusky.viewdata.StatusViewData
+import java.util.Locale
 import javax.inject.Inject
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.launch
@@ -96,13 +99,24 @@ class SearchStatusesFragment : SearchFragment<StatusViewData.Concrete>(), Status
             openSpoiler = accountManager.activeAccount!!.alwaysOpenSpoiler
         )
 
+        binding.searchRecyclerView.setAccessibilityDelegateCompat(
+            ListStatusAccessibilityDelegate(binding.searchRecyclerView, this) { pos ->
+                if (pos in 0 until adapter.itemCount) {
+                    adapter.peek(pos)
+                } else {
+                    null
+                }
+            }
+        )
+
         binding.searchRecyclerView.addItemDecoration(
             DividerItemDecoration(
                 binding.searchRecyclerView.context,
                 DividerItemDecoration.VERTICAL
             )
         )
-        binding.searchRecyclerView.layoutManager = LinearLayoutManager(binding.searchRecyclerView.context)
+        binding.searchRecyclerView.layoutManager =
+            LinearLayoutManager(binding.searchRecyclerView.context)
         return SearchStatusesAdapter(statusDisplayOptions, this)
     }
 
@@ -131,7 +145,7 @@ class SearchStatusesFragment : SearchFragment<StatusViewData.Concrete>(), Status
     }
 
     override fun onMore(view: View, position: Int) {
-        searchAdapter.peek(position)?.status?.let {
+        searchAdapter.peek(position)?.let {
             more(it, view, position)
         }
     }
@@ -159,6 +173,7 @@ class SearchStatusesFragment : SearchFragment<StatusViewData.Concrete>(), Status
                         startActivity(intent)
                     }
                 }
+
                 Attachment.Type.UNKNOWN -> {
                     context?.openLink(actionable.attachments[attachmentIndex].url)
                 }
@@ -215,6 +230,12 @@ class SearchStatusesFragment : SearchFragment<StatusViewData.Concrete>(), Status
         }
     }
 
+    override fun onUntranslate(position: Int) {
+        searchAdapter.peek(position)?.let {
+            viewModel.untranslate(it)
+        }
+    }
+
     companion object {
         fun newInstance() = SearchStatusesFragment()
     }
@@ -244,7 +265,8 @@ class SearchStatusesFragment : SearchFragment<StatusViewData.Concrete>(), Status
         bottomSheetActivity?.startActivityWithSlideInAnimation(intent)
     }
 
-    private fun more(status: Status, view: View, position: Int) {
+    private fun more(statusViewData: StatusViewData.Concrete, view: View, position: Int) {
+        val status = statusViewData.status
         val id = status.actionableId
         val accountId = status.actionableStatus.account.id
         val accountUsername = status.actionableStatus.account.username
@@ -266,12 +288,14 @@ class SearchStatusesFragment : SearchFragment<StatusViewData.Concrete>(), Status
                         )
                     menu.add(0, R.id.pin, 1, textId)
                 }
+
                 Status.Visibility.PRIVATE -> {
                     var reblogged = status.reblogged
                     if (status.reblog != null) reblogged = status.reblog.reblogged
                     menu.findItem(R.id.status_reblog_private).isVisible = !reblogged
                     menu.findItem(R.id.status_unreblog_private).isVisible = reblogged
                 }
+
                 Status.Visibility.UNKNOWN, Status.Visibility.DIRECT -> {
                 } // Ignore
             }
@@ -289,7 +313,8 @@ class SearchStatusesFragment : SearchFragment<StatusViewData.Concrete>(), Status
             openAsItem.title = openAsText
         }
 
-        val mutable = statusIsByCurrentUser || accountIsInMentions(viewModel.activeAccount, status.mentions)
+        val mutable =
+            statusIsByCurrentUser || accountIsInMentions(viewModel.activeAccount, status.mentions)
         val muteConversationItem = popup.menu.findItem(R.id.status_mute_conversation).apply {
             isVisible = mutable
         }
@@ -303,6 +328,14 @@ class SearchStatusesFragment : SearchFragment<StatusViewData.Concrete>(), Status
             )
         }
 
+        // translation not there for your own posts
+        popup.menu.findItem(R.id.status_translate)?.let { translateItem ->
+            translateItem.isVisible =
+                !status.language.equals(Locale.getDefault().language, ignoreCase = true) &&
+                viewModel.supportsTranslation()
+            translateItem.setTitle(if (statusViewData.translation != null) R.string.action_show_original else R.string.action_translate)
+        }
+
         popup.setOnMenuItemClickListener { item ->
             when (item.itemId) {
                 R.id.post_share_content -> {
@@ -324,6 +357,7 @@ class SearchStatusesFragment : SearchFragment<StatusViewData.Concrete>(), Status
                     )
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.post_share_link -> {
                     val sendIntent = Intent()
                     sendIntent.action = Intent.ACTION_SEND
@@ -337,6 +371,7 @@ class SearchStatusesFragment : SearchFragment<StatusViewData.Concrete>(), Status
                     )
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_copy_link -> {
                     val clipboard = requireActivity().getSystemService(
                         Context.CLIPBOARD_SERVICE
@@ -344,56 +379,85 @@ class SearchStatusesFragment : SearchFragment<StatusViewData.Concrete>(), Status
                     clipboard.setPrimaryClip(ClipData.newPlainText(null, statusUrl))
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_open_as -> {
                     showOpenAsDialog(statusUrl!!, item.title)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_download_media -> {
                     requestDownloadAllMedia(status)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_mute_conversation -> {
                     searchAdapter.peek(position)?.let { foundStatus ->
                         viewModel.muteConversation(foundStatus, status.muted != true)
                     }
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_mute -> {
                     onMute(accountId, accountUsername)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_block -> {
                     onBlock(accountId, accountUsername)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_report -> {
                     openReportPage(accountId, accountUsername, id)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_unreblog_private -> {
                     onReblog(false, position)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_reblog_private -> {
                     onReblog(true, position)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_delete -> {
                     showConfirmDeleteDialog(id, position)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_delete_and_redraft -> {
                     showConfirmEditDialog(id, position, status)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_edit -> {
                     editStatus(id, position, status)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.pin -> {
                     viewModel.pinAccount(status, !status.isPinned())
                     return@setOnMenuItemClickListener true
                 }
+
+                R.id.status_translate -> {
+                    if (statusViewData.translation != null) {
+                        viewModel.untranslate(statusViewData)
+                    } else {
+                        lifecycleScope.launch {
+                            viewModel.translate(statusViewData)
+                                .onFailure {
+                                    Snackbar.make(
+                                        requireView(),
+                                        getString(R.string.ui_error_translate, it.message),
+                                        Snackbar.LENGTH_LONG
+                                    ).show()
+                                }
+                        }
+                    }
+                }
             }
             false
         }

app/src/main/java/com/keylesspalace/tusky/components/timeline/TimelineFragment.kt

@@ -36,8 +36,10 @@ import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import androidx.recyclerview.widget.SimpleItemAnimator
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout.OnRefreshListener
+import at.connyduck.calladapter.networkresult.onFailure
 import at.connyduck.sparkbutton.helpers.Utils
 import com.google.android.material.color.MaterialColors
+import com.google.android.material.snackbar.Snackbar
 import com.keylesspalace.tusky.R
 import com.keylesspalace.tusky.adapter.StatusBaseViewHolder
 import com.keylesspalace.tusky.appstore.EventHub
@@ -70,6 +72,7 @@ import com.keylesspalace.tusky.util.updateRelativeTimePeriodically
 import com.keylesspalace.tusky.util.viewBinding
 import com.keylesspalace.tusky.viewdata.AttachmentViewData
 import com.keylesspalace.tusky.viewdata.StatusViewData
+import com.keylesspalace.tusky.viewdata.TranslationViewData
 import com.mikepenz.iconics.IconicsDrawable
 import com.mikepenz.iconics.typeface.library.googlematerial.GoogleMaterial
 import com.mikepenz.iconics.utils.colorInt
@@ -238,12 +241,14 @@ class TimelineFragment :
                             }
                         }
                     }
+
                     is LoadState.Error -> {
                         binding.statusView.show()
                         binding.statusView.setup(
                             (loadState.refresh as LoadState.Error).error
                         ) { onRefresh() }
                     }
+
                     is LoadState.Loading -> {
                         binding.progressBar.show()
                     }
@@ -306,6 +311,7 @@ class TimelineFragment :
                     is PreferenceChangedEvent -> {
                         onPreferenceChanged(event.preferenceKey)
                     }
+
                     is StatusComposedEvent -> {
                         val status = event.status
                         handleStatusComposeEvent(status)
@@ -348,6 +354,7 @@ class TimelineFragment :
                     false
                 }
             }
+
             else -> false
         }
     }
@@ -415,6 +422,17 @@ class TimelineFragment :
         adapter.refresh()
     }
 
+    override val onMoreTranslate =
+        { translate: Boolean, position: Int ->
+            if (translate) {
+                onTranslate(position)
+            } else {
+                onUntranslate(
+                    position
+                )
+            }
+        }
+
     override fun onReply(position: Int) {
         val status = adapter.peek(position)?.asStatusOrNull() ?: return
         super.reply(status.status)
@@ -425,6 +443,25 @@ class TimelineFragment :
         viewModel.reblog(reblog, status)
     }
 
+    private fun onTranslate(position: Int) {
+        val status = adapter.peek(position)?.asStatusOrNull() ?: return
+        lifecycleScope.launch {
+            viewModel.translate(status)
+                .onFailure {
+                    Snackbar.make(
+                        requireView(),
+                        getString(R.string.ui_error_translate, it.message),
+                        Snackbar.LENGTH_LONG
+                    ).show()
+                }
+        }
+    }
+
+    override fun onUntranslate(position: Int) {
+        val status = adapter.peek(position)?.asStatusOrNull() ?: return
+        viewModel.untranslate(status)
+    }
+
     override fun onFavourite(favourite: Boolean, position: Int) {
         val status = adapter.peek(position)?.asStatusOrNull() ?: return
         viewModel.favorite(favourite, status)
@@ -447,7 +484,12 @@ class TimelineFragment :
 
     override fun onMore(view: View, position: Int) {
         val status = adapter.peek(position)?.asStatusOrNull() ?: return
-        super.more(status.status, view, position)
+        super.more(
+            status.status,
+            view,
+            position,
+            (status.translation as? TranslationViewData.Loaded)?.data
+        )
     }
 
     override fun onOpenReblog(position: Int) {
@@ -480,7 +522,8 @@ class TimelineFragment :
     override fun onLoadMore(position: Int) {
         val placeholder = adapter.peek(position)?.asPlaceholderOrNull() ?: return
         loadMorePosition = position
-        statusIdBelowLoadMore = if (position + 1 < adapter.itemCount) adapter.peek(position + 1)?.id else null
+        statusIdBelowLoadMore =
+            if (position + 1 < adapter.itemCount) adapter.peek(position + 1)?.id else null
         viewModel.loadMore(placeholder.id)
     }
 
@@ -533,6 +576,7 @@ class TimelineFragment :
             PrefKeys.FAB_HIDE -> {
                 hideFab = sharedPreferences.getBoolean(PrefKeys.FAB_HIDE, false)
             }
+
             PrefKeys.MEDIA_PREVIEW_ENABLED -> {
                 val enabled = accountManager.activeAccount!!.mediaPreviewEnabled
                 val oldMediaPreviewEnabled = adapter.mediaPreviewEnabled
@@ -541,6 +585,7 @@ class TimelineFragment :
                     adapter.notifyItemRangeChanged(0, adapter.itemCount)
                 }
             }
+
             PrefKeys.READING_ORDER -> {
                 readingOrder = ReadingOrder.from(
                     sharedPreferences.getString(PrefKeys.READING_ORDER, null)
@@ -555,10 +600,12 @@ class TimelineFragment :
             TimelineViewModel.Kind.PUBLIC_FEDERATED,
             TimelineViewModel.Kind.PUBLIC_LOCAL,
             TimelineViewModel.Kind.PUBLIC_TRENDING_STATUSES -> adapter.refresh()
+
             TimelineViewModel.Kind.USER,
             TimelineViewModel.Kind.USER_WITH_REPLIES -> if (status.account.id == viewModel.id) {
                 adapter.refresh()
             }
+
             TimelineViewModel.Kind.TAG,
             TimelineViewModel.Kind.FAVOURITES,
             TimelineViewModel.Kind.LIST,
@@ -583,13 +630,14 @@ class TimelineFragment :
 
     override fun onPause() {
         super.onPause()
-        (binding.recyclerView.layoutManager as? LinearLayoutManager)?.findFirstVisibleItemPosition()?.let { position ->
+        (binding.recyclerView.layoutManager as? LinearLayoutManager)?.findFirstVisibleItemPosition()
-            if (position != RecyclerView.NO_POSITION) {
+            ?.let { position ->
-                adapter.snapshot().getOrNull(position)?.id?.let { statusId ->
+                if (position != RecyclerView.NO_POSITION) {
-                    viewModel.saveReadingPosition(statusId)
+                    adapter.snapshot().getOrNull(position)?.id?.let { statusId ->
+                        viewModel.saveReadingPosition(statusId)
+                    }
                 }
             }
-        }
     }
 
     override fun onResume() {

app/src/main/java/com/keylesspalace/tusky/components/timeline/TimelineTypeMappers.kt

@@ -29,6 +29,7 @@ import com.keylesspalace.tusky.entity.Poll
 import com.keylesspalace.tusky.entity.Status
 import com.keylesspalace.tusky.entity.TimelineAccount
 import com.keylesspalace.tusky.viewdata.StatusViewData
+import com.keylesspalace.tusky.viewdata.TranslationViewData
 import java.util.Date
 
 private const val TAG = "TimelineTypeMappers"
@@ -155,7 +156,7 @@ fun Status.toEntity(
     )
 }
 
-fun TimelineStatusWithAccount.toViewData(gson: Gson, isDetailed: Boolean = false): StatusViewData {
+fun TimelineStatusWithAccount.toViewData(gson: Gson, isDetailed: Boolean = false, translation: TranslationViewData? = null): StatusViewData {
     if (this.account == null) {
         Log.d(TAG, "Constructing Placeholder(${this.status.serverId}, ${this.status.expanded})")
         return StatusViewData.Placeholder(this.status.serverId, this.status.expanded)
@@ -199,7 +200,7 @@ fun TimelineStatusWithAccount.toViewData(gson: Gson, isDetailed: Boolean = false
             card = card,
             repliesCount = status.repliesCount,
             language = status.language,
-            filtered = status.filtered
+            filtered = status.filtered,
         )
     }
     val status = if (reblog != null) {
@@ -244,7 +245,7 @@ fun TimelineStatusWithAccount.toViewData(gson: Gson, isDetailed: Boolean = false
             inReplyToId = status.inReplyToId,
             inReplyToAccountId = status.inReplyToAccountId,
             reblog = null,
-            content = status.content.orEmpty(),
+            content = translation?.data?.content ?: status.content.orEmpty(),
             createdAt = Date(status.createdAt),
             editedAt = status.editedAt?.let { Date(it) },
             emojis = emojis,
@@ -274,6 +275,7 @@ fun TimelineStatusWithAccount.toViewData(gson: Gson, isDetailed: Boolean = false
         isExpanded = this.status.expanded,
         isShowingContent = this.status.contentShowing,
         isCollapsed = this.status.contentCollapsed,
-        isDetailed = isDetailed
+        isDetailed = isDetailed,
+        translation = translation,
     )
 }

app/src/main/java/com/keylesspalace/tusky/components/timeline/viewmodel/CachedTimelineViewModel.kt

@@ -26,6 +26,9 @@ import androidx.paging.cachedIn
 import androidx.paging.filter
 import androidx.paging.map
 import androidx.room.withTransaction
+import at.connyduck.calladapter.networkresult.NetworkResult
+import at.connyduck.calladapter.networkresult.map
+import at.connyduck.calladapter.networkresult.onFailure
 import com.google.gson.Gson
 import com.keylesspalace.tusky.appstore.EventHub
 import com.keylesspalace.tusky.components.preference.PreferencesFragment.ReadingOrder.NEWEST_FIRST
@@ -45,11 +48,13 @@ import com.keylesspalace.tusky.network.MastodonApi
 import com.keylesspalace.tusky.usecase.TimelineCases
 import com.keylesspalace.tusky.util.EmptyPagingSource
 import com.keylesspalace.tusky.viewdata.StatusViewData
+import com.keylesspalace.tusky.viewdata.TranslationViewData
 import javax.inject.Inject
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.asExecutor
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.flowOn
-import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.launch
 import retrofit2.HttpException
 
@@ -76,6 +81,9 @@ class CachedTimelineViewModel @Inject constructor(
 
     private var currentPagingSource: PagingSource<Int, TimelineStatusWithAccount>? = null
 
+    /** Map from status id to translation. */
+    private val translations = MutableStateFlow(mapOf<String, TranslationViewData>())
+
     @OptIn(ExperimentalPagingApi::class)
     override val statuses = Pager(
         config = PagingConfig(pageSize = LOAD_AT_ONCE),
@@ -91,15 +99,24 @@ class CachedTimelineViewModel @Inject constructor(
             }
         }
     ).flow
-        .map { pagingData ->
+        // Apply cachedIn() early to be able to combine with translation flow.
+        // This will not cache ViewData's but practically we don't need this.
+        // If you notice that this flow is used in more than once place consider
+        // adding another cachedIn() for the overall result.
+        .cachedIn(viewModelScope)
+        .combine(translations) { pagingData, translations ->
             pagingData.map(Dispatchers.Default.asExecutor()) { timelineStatus ->
-                timelineStatus.toViewData(gson)
+                val translation = translations[timelineStatus.status.serverId]
+                timelineStatus.toViewData(
+                    gson,
+                    isDetailed = false,
+                    translation = translation
+                )
             }.filter(Dispatchers.Default.asExecutor()) { statusViewData ->
                 shouldFilterStatus(statusViewData) != Filter.Action.HIDE
             }
         }
         .flowOn(Dispatchers.Default)
-        .cachedIn(viewModelScope)
 
     override fun updatePoll(newPoll: Poll, status: StatusViewData.Concrete) {
         // handled by CacheUpdater
@@ -276,8 +293,23 @@ class CachedTimelineViewModel @Inject constructor(
         }
     }
 
+    override suspend fun translate(status: StatusViewData.Concrete): NetworkResult<Unit> {
+        translations.value = translations.value + (status.id to TranslationViewData.Loading)
+        return timelineCases.translate(status.actionableId)
+            .map { translation ->
+                translations.value =
+                    translations.value + (status.id to TranslationViewData.Loaded(translation))
+            }
+            .onFailure {
+                translations.value = translations.value - status.id
+            }
+    }
+
+    override fun untranslate(status: StatusViewData.Concrete) {
+        translations.value = translations.value - status.id
+    }
+
     companion object {
         private const val TAG = "CachedTimelineViewModel"
-        private const val MAX_STATUSES_IN_CACHE = 1000
     }
 }

app/src/main/java/com/keylesspalace/tusky/components/timeline/viewmodel/NetworkTimelineViewModel.kt

@@ -23,6 +23,9 @@ import androidx.paging.Pager
 import androidx.paging.PagingConfig
 import androidx.paging.cachedIn
 import androidx.paging.filter
+import at.connyduck.calladapter.networkresult.NetworkResult
+import at.connyduck.calladapter.networkresult.map
+import at.connyduck.calladapter.networkresult.onFailure
 import com.keylesspalace.tusky.appstore.EventHub
 import com.keylesspalace.tusky.components.timeline.util.ifExpected
 import com.keylesspalace.tusky.db.AccountManager
@@ -37,6 +40,7 @@ import com.keylesspalace.tusky.util.isLessThan
 import com.keylesspalace.tusky.util.isLessThanOrEqual
 import com.keylesspalace.tusky.util.toViewData
 import com.keylesspalace.tusky.viewdata.StatusViewData
+import com.keylesspalace.tusky.viewdata.TranslationViewData
 import java.io.IOException
 import javax.inject.Inject
 import kotlinx.coroutines.Dispatchers
@@ -145,7 +149,8 @@ class NetworkTimelineViewModel @Inject constructor(
             try {
                 val placeholderIndex =
                     statusData.indexOfFirst { it is StatusViewData.Placeholder && it.id == placeholderId }
-                statusData[placeholderIndex] = StatusViewData.Placeholder(placeholderId, isLoading = true)
+                statusData[placeholderIndex] =
+                    StatusViewData.Placeholder(placeholderId, isLoading = true)
 
                 val idAbovePlaceholder = statusData.getOrNull(placeholderIndex - 1)?.id
 
@@ -178,7 +183,9 @@ class NetworkTimelineViewModel @Inject constructor(
                     val overlappedFrom = statusData.indexOfFirst {
                         it.asStatusOrNull()?.id?.isLessThanOrEqual(firstId) ?: false
                     }
-                    val overlappedTo = statusData.indexOfFirst { it.asStatusOrNull()?.id?.isLessThan(lastId) ?: false }
+                    val overlappedTo = statusData.indexOfFirst {
+                        it.asStatusOrNull()?.id?.isLessThan(lastId) ?: false
+                    }
 
                     if (overlappedFrom < overlappedTo) {
                         data.mapIndexed { i, status ->
@@ -198,12 +205,18 @@ class NetworkTimelineViewModel @Inject constructor(
 
                         statusData.removeAll { status ->
                             when (status) {
-                                is StatusViewData.Placeholder -> lastId.isLessThan(status.id) && status.id.isLessThanOrEqual(firstId)
+                                is StatusViewData.Placeholder -> lastId.isLessThan(status.id) && status.id.isLessThanOrEqual(
-                                is StatusViewData.Concrete -> lastId.isLessThan(status.id) && status.id.isLessThanOrEqual(firstId)
+                                    firstId
+                                )
+
+                                is StatusViewData.Concrete -> lastId.isLessThan(status.id) && status.id.isLessThanOrEqual(
+                                    firstId
+                                )
                             }
                         }
                     } else {
-                        data[data.size - 1] = StatusViewData.Placeholder(statuses.last().id, isLoading = false)
+                        data[data.size - 1] =
+                            StatusViewData.Placeholder(statuses.last().id, isLoading = false)
                     }
                 }
 
@@ -258,6 +271,21 @@ class NetworkTimelineViewModel @Inject constructor(
         currentSource?.invalidate()
     }
 
+    override suspend fun translate(status: StatusViewData.Concrete): NetworkResult<Unit> {
+        status.copy(translation = TranslationViewData.Loading).update()
+        return timelineCases.translate(status.actionableId)
+            .map { translation ->
+                status.copy(translation = TranslationViewData.Loaded(translation)).update()
+            }
+            .onFailure {
+                status.update()
+            }
+    }
+
+    override fun untranslate(status: StatusViewData.Concrete) {
+        status.copy(translation = null).update()
+    }
+
     @Throws(IOException::class, HttpException::class)
     suspend fun fetchStatusesForKind(
         fromId: String?,
@@ -273,6 +301,7 @@ class NetworkTimelineViewModel @Inject constructor(
                 val additionalHashtags = tags.subList(1, tags.size)
                 api.hashtagTimeline(firstHashtag, additionalHashtags, null, fromId, uptoId, limit)
             }
+
             Kind.USER -> api.accountStatuses(
                 id!!,
                 fromId,
@@ -282,6 +311,7 @@ class NetworkTimelineViewModel @Inject constructor(
                 onlyMedia = null,
                 pinned = null
             )
+
             Kind.USER_PINNED -> api.accountStatuses(
                 id!!,
                 fromId,
@@ -291,6 +321,7 @@ class NetworkTimelineViewModel @Inject constructor(
                 onlyMedia = null,
                 pinned = true
             )
+
             Kind.USER_WITH_REPLIES -> api.accountStatuses(
                 id!!,
                 fromId,
@@ -300,6 +331,7 @@ class NetworkTimelineViewModel @Inject constructor(
                 onlyMedia = null,
                 pinned = null
             )
+
             Kind.FAVOURITES -> api.favourites(fromId, uptoId, limit)
             Kind.BOOKMARKS -> api.bookmarks(fromId, uptoId, limit)
             Kind.LIST -> api.listTimeline(id!!, fromId, uptoId, limit)
@@ -308,7 +340,8 @@ class NetworkTimelineViewModel @Inject constructor(
     }
 
     private fun StatusViewData.Concrete.update() {
-        val position = statusData.indexOfFirst { viewData -> viewData.asStatusOrNull()?.id == this.id }
+        val position =
+            statusData.indexOfFirst { viewData -> viewData.asStatusOrNull()?.id == this.id }
         statusData[position] = this
         currentSource?.invalidate()
     }

app/src/main/java/com/keylesspalace/tusky/components/timeline/viewmodel/TimelineViewModel.kt

@@ -20,6 +20,7 @@ import android.util.Log
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import androidx.paging.PagingData
+import at.connyduck.calladapter.networkresult.NetworkResult
 import at.connyduck.calladapter.networkresult.fold
 import at.connyduck.calladapter.networkresult.getOrElse
 import at.connyduck.calladapter.networkresult.getOrThrow
@@ -52,7 +53,7 @@ import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.launch
 
 abstract class TimelineViewModel(
-    private val timelineCases: TimelineCases,
+    protected val timelineCases: TimelineCases,
     private val api: MastodonApi,
     private val eventHub: EventHub,
     protected val accountManager: AccountManager,
@@ -312,6 +313,9 @@ abstract class TimelineViewModel(
         }
     }
 
+    abstract suspend fun translate(status: StatusViewData.Concrete): NetworkResult<Unit>
+    abstract fun untranslate(status: StatusViewData.Concrete)
+
     companion object {
         private const val TAG = "TimelineVM"
         internal const val LOAD_AT_ONCE = 30

app/src/main/java/com/keylesspalace/tusky/components/viewthread/ViewThreadFragment.kt

@@ -35,6 +35,7 @@ import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.SimpleItemAnimator
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout.OnRefreshListener
+import at.connyduck.calladapter.networkresult.onFailure
 import com.google.android.material.snackbar.Snackbar
 import com.keylesspalace.tusky.R
 import com.keylesspalace.tusky.components.accountlist.AccountListActivity
@@ -56,6 +57,7 @@ import com.keylesspalace.tusky.util.startActivityWithSlideInAnimation
 import com.keylesspalace.tusky.util.viewBinding
 import com.keylesspalace.tusky.viewdata.AttachmentViewData.Companion.list
 import com.keylesspalace.tusky.viewdata.StatusViewData
+import com.keylesspalace.tusky.viewdata.TranslationViewData
 import javax.inject.Inject
 import kotlinx.coroutines.CoroutineStart
 import kotlinx.coroutines.awaitCancellation
@@ -166,6 +168,7 @@ class ViewThreadFragment :
                         initialProgressBar = getProgressBarJob(binding.initialProgressBar, 500)
                         initialProgressBar.start()
                     }
+
                     is ThreadUiState.LoadingThread -> {
                         if (uiState.statusViewDatum == null) {
                             // no detailed statuses available, e.g. because author is blocked
@@ -189,6 +192,7 @@ class ViewThreadFragment :
                         binding.recyclerView.show()
                         binding.statusView.hide()
                     }
+
                     is ThreadUiState.Error -> {
                         Log.w(TAG, "failed to load status", uiState.throwable)
                         initialProgressBar.cancel()
@@ -204,6 +208,7 @@ class ViewThreadFragment :
                             uiState.throwable
                         ) { viewModel.retry(thisThreadsStatusId) }
                     }
+
                     is ThreadUiState.Success -> {
                         if (uiState.statusViewData.none { viewData -> viewData.isDetailed }) {
                             // no detailed statuses available, e.g. because author is blocked
@@ -231,6 +236,7 @@ class ViewThreadFragment :
                         binding.recyclerView.show()
                         binding.statusView.hide()
                     }
+
                     is ThreadUiState.Refreshing -> {
                         threadProgressBar.cancel()
                     }
@@ -270,14 +276,17 @@ class ViewThreadFragment :
                 viewModel.toggleRevealButton()
                 true
             }
+
             R.id.action_open_in_web -> {
                 context?.openLink(requireArguments().getString(URL_EXTRA)!!)
                 true
             }
+
             R.id.action_refresh -> {
                 onRefresh()
                 true
             }
+
             else -> false
         }
     }
@@ -323,6 +332,36 @@ class ViewThreadFragment :
         viewModel.reblog(reblog, status)
     }
 
+    override val onMoreTranslate: ((translate: Boolean, position: Int) -> Unit) =
+        { translate: Boolean, position: Int ->
+            if (translate) {
+                onTranslate(position)
+            } else {
+                onUntranslate(
+                    position
+                )
+            }
+        }
+
+    private fun onTranslate(position: Int) {
+        val status = adapter.currentList[position]
+        lifecycleScope.launch {
+            viewModel.translate(status)
+                .onFailure {
+                    Snackbar.make(
+                        requireView(),
+                        getString(R.string.ui_error_translate, it.message),
+                        Snackbar.LENGTH_LONG
+                    ).show()
+                }
+        }
+    }
+
+    override fun onUntranslate(position: Int) {
+        val status = adapter.currentList[position]
+        viewModel.untranslate(status)
+    }
+
     override fun onFavourite(favourite: Boolean, position: Int) {
         val status = adapter.currentList[position]
         viewModel.favorite(favourite, status)
@@ -334,7 +373,13 @@ class ViewThreadFragment :
     }
 
     override fun onMore(view: View, position: Int) {
-        super.more(adapter.currentList[position].status, view, position)
+        val viewData = adapter.currentList[position]
+        super.more(
+            viewData.status,
+            view,
+            position,
+            (viewData.translation as? TranslationViewData.Loaded)?.data
+        )
     }
 
     override fun onViewMedia(position: Int, attachmentIndex: Int, view: View?) {

app/src/main/java/com/keylesspalace/tusky/components/viewthread/ViewThreadViewModel.kt

@@ -18,9 +18,12 @@ package com.keylesspalace.tusky.components.viewthread
 import android.util.Log
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
+import at.connyduck.calladapter.networkresult.NetworkResult
 import at.connyduck.calladapter.networkresult.fold
 import at.connyduck.calladapter.networkresult.getOrElse
 import at.connyduck.calladapter.networkresult.getOrThrow
+import at.connyduck.calladapter.networkresult.map
+import at.connyduck.calladapter.networkresult.onFailure
 import com.google.gson.Gson
 import com.keylesspalace.tusky.appstore.BlockEvent
 import com.keylesspalace.tusky.appstore.EventHub
@@ -40,6 +43,7 @@ import com.keylesspalace.tusky.usecase.TimelineCases
 import com.keylesspalace.tusky.util.isHttpNotFound
 import com.keylesspalace.tusky.util.toViewData
 import com.keylesspalace.tusky.viewdata.StatusViewData
+import com.keylesspalace.tusky.viewdata.TranslationViewData
 import javax.inject.Inject
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.async
@@ -110,7 +114,7 @@ class ViewThreadViewModel @Inject constructor(
                 Log.d(TAG, "Loaded status from local timeline")
                 val viewData = timelineStatus.toViewData(
                     gson,
-                    isDetailed = true
+                    isDetailed = true,
                 ) as StatusViewData.Concrete
 
                 // Return the correct status, depending on which one matched. If you do not do
@@ -154,8 +158,10 @@ class ViewThreadViewModel @Inject constructor(
             val contextResult = contextCall.await()
 
             contextResult.fold({ statusContext ->
-                val ancestors = statusContext.ancestors.map { status -> status.toViewData() }.filter()
+                val ancestors =
-                val descendants = statusContext.descendants.map { status -> status.toViewData() }.filter()
+                    statusContext.ancestors.map { status -> status.toViewData() }.filter()
+                val descendants =
+                    statusContext.descendants.map { status -> status.toViewData() }.filter()
                 val statuses = ancestors + detailedStatus + descendants
 
                 _uiState.value = ThreadUiState.Success(
@@ -189,6 +195,7 @@ class ViewThreadViewModel @Inject constructor(
             is ThreadUiState.Success -> uiState.statusViewData.find { status ->
                 status.isDetailed
             }
+
             is ThreadUiState.LoadingThread -> uiState.statusViewDatum
             else -> null
         }
@@ -281,13 +288,37 @@ class ViewThreadViewModel @Inject constructor(
         }
     }
 
+    suspend fun translate(status: StatusViewData.Concrete): NetworkResult<Unit> {
+        updateStatusViewData(status.id) { viewData ->
+            viewData.copy(translation = TranslationViewData.Loading)
+        }
+        return timelineCases.translate(status.actionableId)
+            .map { translation ->
+                updateStatusViewData(status.id) { viewData ->
+                    viewData.copy(translation = TranslationViewData.Loaded(translation))
+                }
+            }
+            .onFailure {
+                updateStatusViewData(status.id) { viewData ->
+                    viewData.copy(translation = null)
+                }
+            }
+    }
+
+    fun untranslate(status: StatusViewData.Concrete) {
+        updateStatusViewData(status.id) { viewData ->
+            viewData.copy(translation = null)
+        }
+    }
+
     private fun handleStatusChangedEvent(status: Status) {
         updateStatusViewData(status.id) { viewData ->
             status.toViewData(
                 isShowingContent = viewData.isShowingContent,
                 isExpanded = viewData.isExpanded,
                 isCollapsed = viewData.isCollapsed,
-                isDetailed = viewData.isDetailed
+                isDetailed = viewData.isDetailed,
+                translation = viewData.translation,
             )
         }
     }
@@ -307,7 +338,8 @@ class ViewThreadViewModel @Inject constructor(
         updateSuccess { uiState ->
             val statuses = uiState.statusViewData
             val detailedIndex = statuses.indexOfFirst { status -> status.isDetailed }
-            val repliedIndex = statuses.indexOfFirst { status -> eventStatus.inReplyToId == status.id }
+            val repliedIndex =
+                statuses.indexOfFirst { status -> eventStatus.inReplyToId == status.id }
             if (detailedIndex != -1 && repliedIndex >= detailedIndex) {
                 // there is a new reply to the detailed status or below -> display it
                 val newStatuses = statuses.subList(0, repliedIndex + 1) +
@@ -339,12 +371,14 @@ class ViewThreadViewModel @Inject constructor(
                     },
                     revealButton = RevealButtonState.REVEAL
                 )
+
                 RevealButtonState.REVEAL -> uiState.copy(
                     statusViewData = uiState.statusViewData.map { viewData ->
                         viewData.copy(isExpanded = true)
                     },
                     revealButton = RevealButtonState.HIDE
                 )
+
                 else -> uiState
             }
         }
@@ -441,7 +475,8 @@ class ViewThreadViewModel @Inject constructor(
             it.id == this.id
         }
         return toViewData(
-            isShowingContent = oldStatus?.isShowingContent ?: (alwaysShowSensitiveMedia || !actionableStatus.sensitive),
+            isShowingContent = oldStatus?.isShowingContent
+                ?: (alwaysShowSensitiveMedia || !actionableStatus.sensitive),
             isExpanded = oldStatus?.isExpanded ?: alwaysOpenSpoiler,
             isCollapsed = oldStatus?.isCollapsed ?: !isDetailed,
             isDetailed = oldStatus?.isDetailed ?: isDetailed

app/src/main/java/com/keylesspalace/tusky/db/AppDatabase.java

@@ -44,13 +44,14 @@ import java.io.File;
     },
     // Note: Starting with version 54, database versions in Tusky are always even.
     // This is to reserve odd version numbers for use by forks.
-    version = 56,
+    version = 58,
     autoMigrations = {
         @AutoMigration(from = 48, to = 49),
         @AutoMigration(from = 49, to = 50, spec = AppDatabase.MIGRATION_49_50.class),
         @AutoMigration(from = 50, to = 51),
         @AutoMigration(from = 51, to = 52),
-        @AutoMigration(from = 53, to = 54) // hasDirectMessageBadge in AccountEntity
+        @AutoMigration(from = 53, to = 54), // hasDirectMessageBadge in AccountEntity
+        @AutoMigration(from = 56, to = 58) // translationEnabled in InstanceEntity/InstanceInfoEntity
     }
 )
 public abstract class AppDatabase extends RoomDatabase {

app/src/main/java/com/keylesspalace/tusky/db/InstanceEntity.kt

@@ -38,7 +38,8 @@ data class InstanceEntity(
     val maxMediaAttachments: Int?,
     val maxFields: Int?,
     val maxFieldNameLength: Int?,
-    val maxFieldValueLength: Int?
+    val maxFieldValueLength: Int?,
+    val translationEnabled: Boolean?,
 )
 
 @TypeConverters(Converters::class)
@@ -62,5 +63,6 @@ data class InstanceInfoEntity(
     val maxMediaAttachments: Int?,
     val maxFields: Int?,
     val maxFieldNameLength: Int?,
-    val maxFieldValueLength: Int?
+    val maxFieldValueLength: Int?,
+    val translationEnabled: Boolean?,
 )

app/src/main/java/com/keylesspalace/tusky/entity/Status.kt

@@ -49,8 +49,11 @@ data class Status(
     val pinned: Boolean?,
     val muted: Boolean?,
     val poll: Poll?,
+    /** Preview card for links included within status content. */
     val card: Card?,
+    /** ISO 639 language code for this status. */
     val language: String?,
+    /** If the current token has an authorized user: The filter and keywords that matched this status. */
     val filtered: List<FilterResult>?
 ) {
 

app/src/main/java/com/keylesspalace/tusky/entity/Translation.kt

@@ -0,0 +1,25 @@
+package com.keylesspalace.tusky.entity
+
+import com.google.gson.annotations.SerializedName
+
+data class MediaTranslation(
+    val id: String,
+    val description: String,
+)
+
+/**
+ * Represents the result of machine translating some status content.
+ *
+ * See [doc](https://docs.joinmastodon.org/entities/Translation/).
+ */
+data class Translation(
+    val content: String,
+    @SerializedName("spoiler_warning")
+    val spoilerWarning: String?,
+    val poll: List<String>?,
+    @SerializedName("media_attachments")
+    val mediaAttachments: List<MediaTranslation>,
+    @SerializedName("detected_source_language")
+    val detectedSourceLanguage: String,
+    val provider: String,
+)

app/src/main/java/com/keylesspalace/tusky/fragment/NotificationsFragment.java

@@ -109,6 +109,7 @@ import at.connyduck.sparkbutton.helpers.Utils;
 import kotlin.Unit;
 import kotlin.collections.CollectionsKt;
 import kotlin.jvm.functions.Function1;
+import kotlin.jvm.functions.Function2;
 import kotlinx.coroutines.Job;
 
 public class NotificationsFragment extends SFragment implements
@@ -408,6 +409,12 @@ public class NotificationsFragment extends SFragment implements
         sendFetchNotificationsRequest(null, topId, FetchEnd.TOP, -1);
     }
 
+    @Nullable
+    @Override
+    protected Function2<Boolean, Integer, Unit> getOnMoreTranslate() {
+        return null;
+    }
+
     @Override
     public void onReply(int position) {
         super.reply(notifications.get(position).asRight().getStatus());
@@ -490,7 +497,7 @@ public class NotificationsFragment extends SFragment implements
     @Override
     public void onMore(@NonNull View view, int position) {
         Notification notification = notifications.get(position).asRight();
-        super.more(notification.getStatus(), view, position);
+        super.more(notification.getStatus(), view, position, null);
     }
 
     @Override
@@ -525,10 +532,6 @@ public class NotificationsFragment extends SFragment implements
         updateViewDataAt(position, (vd) -> vd.copyWithShowingContent(isShowing));
     }
 
-    private void setPinForStatus(String statusId, boolean pinned) {
-        updateStatus(statusId, status -> status.copyWithPinned(pinned));
-    }
-
     @Override
     public void onLoadMore(int position) {
         // Check bounds before accessing list,
@@ -555,6 +558,11 @@ public class NotificationsFragment extends SFragment implements
         updateViewDataAt(position, (vd) -> vd.copyWithCollapsed(isCollapsed));
     }
 
+    @Override
+    public void onUntranslate(int position) {
+        // not needed
+    }
+
     private void updateStatus(String statusId, Function<Status, Status> mapper) {
         int index = CollectionsKt.indexOfFirst(this.notifications, (s) -> s.isRight() &&
                 s.asRight().getStatus() != null &&

app/src/main/java/com/keylesspalace/tusky/fragment/SFragment.kt

@@ -46,12 +46,14 @@ import com.keylesspalace.tusky.ViewMediaActivity.Companion.newIntent
 import com.keylesspalace.tusky.components.compose.ComposeActivity
 import com.keylesspalace.tusky.components.compose.ComposeActivity.Companion.startIntent
 import com.keylesspalace.tusky.components.compose.ComposeActivity.ComposeOptions
+import com.keylesspalace.tusky.components.instanceinfo.InstanceInfoRepository
 import com.keylesspalace.tusky.components.report.ReportActivity.Companion.getIntent
 import com.keylesspalace.tusky.db.AccountEntity
 import com.keylesspalace.tusky.db.AccountManager
 import com.keylesspalace.tusky.di.Injectable
 import com.keylesspalace.tusky.entity.Attachment
 import com.keylesspalace.tusky.entity.Status
+import com.keylesspalace.tusky.entity.Translation
 import com.keylesspalace.tusky.interfaces.AccountSelectionListener
 import com.keylesspalace.tusky.network.MastodonApi
 import com.keylesspalace.tusky.usecase.TimelineCases
@@ -60,6 +62,7 @@ import com.keylesspalace.tusky.util.parseAsMastodonHtml
 import com.keylesspalace.tusky.util.startActivityWithSlideInAnimation
 import com.keylesspalace.tusky.view.showMuteAccountDialog
 import com.keylesspalace.tusky.viewdata.AttachmentViewData
+import java.util.Locale
 import javax.inject.Inject
 import kotlinx.coroutines.launch
 
@@ -72,6 +75,10 @@ import kotlinx.coroutines.launch
 abstract class SFragment : Fragment(), Injectable {
     protected abstract fun removeItem(position: Int)
     protected abstract fun onReblog(reblog: Boolean, position: Int)
+
+    /** `null` if translation is not supported on this screen */
+    protected abstract val onMoreTranslate: ((translate: Boolean, position: Int) -> Unit)?
+
     private lateinit var bottomSheetActivity: BottomSheetActivity
 
     @Inject
@@ -83,6 +90,9 @@ abstract class SFragment : Fragment(), Injectable {
     @Inject
     lateinit var timelineCases: TimelineCases
 
+    @Inject
+    lateinit var instanceInfoRepository: InstanceInfoRepository
+
     override fun startActivity(intent: Intent) {
         requireActivity().startActivityWithSlideInAnimation(intent)
     }
@@ -96,6 +106,13 @@ abstract class SFragment : Fragment(), Injectable {
         }
     }
 
+    override fun onResume() {
+        super.onResume()
+
+        // make sure we have instance info for when we'll need it
+        instanceInfoRepository.precache()
+    }
+
     protected fun openReblog(status: Status?) {
         if (status == null) return
         bottomSheetActivity.viewAccount(status.account.id)
@@ -140,7 +157,7 @@ abstract class SFragment : Fragment(), Injectable {
         requireActivity().startActivity(intent)
     }
 
-    protected fun more(status: Status, view: View, position: Int) {
+    protected fun more(status: Status, view: View, position: Int, translation: Translation?) {
         val id = status.actionableId
         val accountId = status.actionableStatus.account.id
         val accountUsername = status.actionableStatus.account.username
@@ -167,16 +184,19 @@ abstract class SFragment : Fragment(), Injectable {
                         )
                     )
                 }
+
                 Status.Visibility.PRIVATE -> {
                     val reblogged = status.reblog?.reblogged ?: status.reblogged
                     menu.findItem(R.id.status_reblog_private).isVisible = !reblogged
                     menu.findItem(R.id.status_unreblog_private).isVisible = reblogged
                 }
+
                 else -> {}
             }
         } else {
             popup.inflate(R.menu.status_more)
-            popup.menu.findItem(R.id.status_download_media).isVisible = status.attachments.isNotEmpty()
+            popup.menu.findItem(R.id.status_download_media).isVisible =
+                status.attachments.isNotEmpty()
         }
         val menu = popup.menu
         val openAsItem = menu.findItem(R.id.status_open_as)
@@ -187,7 +207,8 @@ abstract class SFragment : Fragment(), Injectable {
             openAsItem.title = openAsText
         }
         val muteConversationItem = menu.findItem(R.id.status_mute_conversation)
-        val mutable = statusIsByCurrentUser || accountIsInMentions(activeAccount, status.mentions)
+        val mutable =
+            statusIsByCurrentUser || accountIsInMentions(activeAccount, status.mentions)
         muteConversationItem.isVisible = mutable
         if (mutable) {
             muteConversationItem.setTitle(
@@ -198,6 +219,15 @@ abstract class SFragment : Fragment(), Injectable {
                 }
             )
         }
+
+        // translation not there for your own posts
+        menu.findItem(R.id.status_translate)?.let { translateItem ->
+            translateItem.isVisible = onMoreTranslate != null &&
+                !status.language.equals(Locale.getDefault().language, ignoreCase = true) &&
+                instanceInfoRepository.cachedInstanceInfoOrFallback.translationEnabled == true
+            translateItem.setTitle(if (translation != null) R.string.action_show_original else R.string.action_translate)
+        }
+
         popup.setOnMenuItemClickListener { item: MenuItem ->
             when (item.itemId) {
                 R.id.post_share_content -> {
@@ -219,6 +249,7 @@ abstract class SFragment : Fragment(), Injectable {
                     )
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.post_share_link -> {
                     val sendIntent = Intent().apply {
                         action = Intent.ACTION_SEND
@@ -233,6 +264,7 @@ abstract class SFragment : Fragment(), Injectable {
                     )
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_copy_link -> {
                     (
                         requireActivity().getSystemService(
@@ -243,62 +275,80 @@ abstract class SFragment : Fragment(), Injectable {
                     }
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_open_as -> {
                     showOpenAsDialog(statusUrl, item.title)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_download_media -> {
                     requestDownloadAllMedia(status)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_mute -> {
                     onMute(accountId, accountUsername)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_block -> {
                     onBlock(accountId, accountUsername)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_report -> {
                     openReportPage(accountId, accountUsername, id)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_unreblog_private -> {
                     onReblog(false, position)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_reblog_private -> {
                     onReblog(true, position)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_delete -> {
                     showConfirmDeleteDialog(id, position)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_delete_and_redraft -> {
                     showConfirmEditDialog(id, position, status)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_edit -> {
                     editStatus(id, status)
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.pin -> {
                     lifecycleScope.launch {
-                        timelineCases.pin(status.id, !status.isPinned()).onFailure { e: Throwable ->
+                        timelineCases.pin(status.id, !status.isPinned())
-                            val message = e.message
+                            .onFailure { e: Throwable ->
-                                ?: getString(if (status.isPinned()) R.string.failed_to_unpin else R.string.failed_to_pin)
+                                val message = e.message
-                            Snackbar.make(requireView(), message, Snackbar.LENGTH_LONG).show()
+                                    ?: getString(if (status.isPinned()) R.string.failed_to_unpin else R.string.failed_to_pin)
-                        }
+                                Snackbar.make(requireView(), message, Snackbar.LENGTH_LONG)
+                                    .show()
+                            }
                     }
                     return@setOnMenuItemClickListener true
                 }
+
                 R.id.status_mute_conversation -> {
                     lifecycleScope.launch {
                         timelineCases.muteConversation(status.id, status.muted != true)
                     }
                     return@setOnMenuItemClickListener true
                 }
+
+                R.id.status_translate -> {
+                    onMoreTranslate?.invoke(translation == null, position)
+                }
             }
             false
         }
@@ -346,6 +396,7 @@ abstract class SFragment : Fragment(), Injectable {
                     startActivity(intent)
                 }
             }
+
             Attachment.Type.UNKNOWN -> {
                 requireContext().openLink(attachment.url)
             }

app/src/main/java/com/keylesspalace/tusky/interfaces/StatusActionListener.java

@@ -64,7 +64,8 @@ public interface StatusActionListener extends LinkListener {
     void onVoteInPoll(int position, @NonNull List<Integer> choices);
 
     default void onShowEdits(int position) {}
-    
+
     void clearWarningAction(int position);
 
+    void onUntranslate(int position);
 }

app/src/main/java/com/keylesspalace/tusky/network/MastodonApi.kt

@@ -45,6 +45,7 @@ import com.keylesspalace.tusky.entity.StatusContext
 import com.keylesspalace.tusky.entity.StatusEdit
 import com.keylesspalace.tusky.entity.StatusSource
 import com.keylesspalace.tusky.entity.TimelineAccount
+import com.keylesspalace.tusky.entity.Translation
 import com.keylesspalace.tusky.entity.TrendingTag
 import okhttp3.MultipartBody
 import okhttp3.RequestBody
@@ -703,4 +704,11 @@ interface MastodonApi {
         @Query("limit") limit: Int? = null,
         @Query("offset") offset: String? = null
     ): Response<List<Status>>
+
+    @FormUrlEncoded
+    @POST("api/v1/statuses/{id}/translate")
+    suspend fun translate(
+        @Path("id") statusId: String,
+        @Field("lang") targetLanguage: String?
+    ): NetworkResult<Translation>
 }

app/src/main/java/com/keylesspalace/tusky/usecase/TimelineCases.kt

@@ -33,9 +33,11 @@ import com.keylesspalace.tusky.entity.Notification
 import com.keylesspalace.tusky.entity.Poll
 import com.keylesspalace.tusky.entity.Relationship
 import com.keylesspalace.tusky.entity.Status
+import com.keylesspalace.tusky.entity.Translation
 import com.keylesspalace.tusky.network.MastodonApi
 import com.keylesspalace.tusky.util.Single
 import com.keylesspalace.tusky.util.getServerErrorMessage
+import java.util.Locale
 import javax.inject.Inject
 import okhttp3.ResponseBody
 import retrofit2.Response
@@ -184,6 +186,12 @@ class TimelineCases @Inject constructor(
         return Single { mastodonApi.clearNotifications() }
     }
 
+    suspend fun translate(
+        statusId: String
+    ): NetworkResult<Translation> {
+        return mastodonApi.translate(statusId, Locale.getDefault().language)
+    }
+
     companion object {
         private const val TAG = "TimelineCases"
     }

app/src/main/java/com/keylesspalace/tusky/util/LocaleUtils.kt

@@ -80,3 +80,8 @@ fun getLocaleList(initialLanguages: List<String>): List<Locale> {
     ensureLanguagesAreFirst(locales, initialLanguages)
     return locales
 }
+
+fun localeNameForUntrustedISO639LangCode(code: String): String {
+    // It seems like it never throws?
+    return Locale(code).displayName
+}

app/src/main/java/com/keylesspalace/tusky/util/ViewDataUtils.kt

@@ -41,20 +41,23 @@ import com.keylesspalace.tusky.entity.Status
 import com.keylesspalace.tusky.entity.TrendingTag
 import com.keylesspalace.tusky.viewdata.NotificationViewData
 import com.keylesspalace.tusky.viewdata.StatusViewData
+import com.keylesspalace.tusky.viewdata.TranslationViewData
 import com.keylesspalace.tusky.viewdata.TrendingViewData
 
 fun Status.toViewData(
     isShowingContent: Boolean,
     isExpanded: Boolean,
     isCollapsed: Boolean,
-    isDetailed: Boolean = false
+    isDetailed: Boolean = false,
+    translation: TranslationViewData? = null,
 ): StatusViewData.Concrete {
     return StatusViewData.Concrete(
         status = this,
         isShowingContent = isShowingContent,
         isCollapsed = isCollapsed,
         isExpanded = isExpanded,
-        isDetailed = isDetailed
+        isDetailed = isDetailed,
+        translation = translation,
     )
 }
 

app/src/main/java/com/keylesspalace/tusky/viewdata/StatusViewData.kt

@@ -15,11 +15,24 @@
 package com.keylesspalace.tusky.viewdata
 
 import android.text.Spanned
+import com.keylesspalace.tusky.entity.Attachment
 import com.keylesspalace.tusky.entity.Filter
 import com.keylesspalace.tusky.entity.Status
+import com.keylesspalace.tusky.entity.Translation
 import com.keylesspalace.tusky.util.parseAsMastodonHtml
 import com.keylesspalace.tusky.util.shouldTrimStatus
 
+sealed class TranslationViewData {
+    abstract val data: Translation?
+
+    data class Loaded(override val data: Translation) : TranslationViewData()
+
+    data object Loading : TranslationViewData() {
+        override val data: Translation?
+            get() = null
+    }
+}
+
 /**
  * Created by charlag on 11/07/2017.
  *
@@ -41,12 +54,28 @@ sealed class StatusViewData {
          * @return Whether the post is collapsed or fully expanded.
          */
         val isCollapsed: Boolean,
-        val isDetailed: Boolean = false
+        val isDetailed: Boolean = false,
+        val translation: TranslationViewData? = null,
     ) : StatusViewData() {
         override val id: String
             get() = status.id
 
-        val content: Spanned = status.actionableStatus.content.parseAsMastodonHtml()
+        val content: Spanned =
+            (translation?.data?.content ?: actionable.content).parseAsMastodonHtml()
+
+        val attachments: List<Attachment> =
+            actionable.attachments.translated { translation -> map { it.translated(translation) } }
+
+        val spoilerText: String =
+            actionable.spoilerText.translated { translation -> translation.spoilerWarning ?: this }
+
+        val poll = actionable.poll?.translated { translation ->
+            val translatedOptionsText = translation.poll ?: return@translated this
+            val translatedOptions = options.zip(translatedOptionsText) { option, translatedText ->
+                option.copy(title = translatedText)
+            }
+            copy(options = translatedOptions)
+        }
 
         /**
          * Specifies whether the content of this post is long enough to be automatically
@@ -91,6 +120,20 @@ sealed class StatusViewData {
         fun copyWithCollapsed(isCollapsed: Boolean): Concrete {
             return copy(isCollapsed = isCollapsed)
         }
+
+        private fun Attachment.translated(translation: Translation): Attachment {
+            val translatedDescription =
+                translation.mediaAttachments.find { it.id == id }?.description
+                    ?: return this
+            return copy(description = translatedDescription)
+        }
+
+        private inline fun <T> T.translated(mapper: T.(Translation) -> T): T =
+            if (translation is TranslationViewData.Loaded) {
+                mapper(translation.data)
+            } else {
+                this
+            }
     }
 
     data class Placeholder(

app/src/main/java/com/keylesspalace/tusky/viewmodel/EditProfileViewModel.kt

@@ -70,7 +70,7 @@ class EditProfileViewModel @Inject constructor(
     val headerData = MutableLiveData<Uri>()
     val saveData = MutableLiveData<Resource<Nothing>>()
 
-    val instanceData: Flow<InstanceInfo> = instanceInfoRepo::getInstanceInfo.asFlow()
+    val instanceData: Flow<InstanceInfo> = instanceInfoRepo::getUpdatedInstanceInfoOrFallback.asFlow()
         .shareIn(viewModelScope, SharingStarted.Eagerly, replay = 1)
 
     val isChanged = MutableStateFlow(false)

app/src/main/res/layout/item_status.xml

@@ -103,6 +103,47 @@
         app:layout_constraintTop_toTopOf="@id/status_display_name"
         tools:text="13:37" />
 
+    <Button
+        android:id="@+id/status_button_untranslate"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/action_show_original"
+        style="@style/TuskyButton.TextButton"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="@id/status_translation_status"
+        app:layout_constraintBottom_toBottomOf="@id/status_translation_status"
+        android:layout_marginEnd="10dp"
+        android:visibility="gone"
+        tools:visibility="visible"
+        android:minHeight="0dp" />
+
+    <TextView
+        android:id="@+id/status_translation_status"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        style="@style/TextSizeSmall"
+        tools:text="Translated from Lang by Service"
+        app:layout_constraintStart_toStartOf="@id/status_display_name"
+        app:layout_constraintEnd_toStartOf="@id/status_button_untranslate"
+        app:layout_constraintTop_toBottomOf="@id/status_username"
+        android:layout_marginEnd="4dp"
+        android:maxLines="4"
+        android:visibility="gone"
+        tools:visibility="visible"
+        android:minLines="2"
+        android:lineSpacingMultiplier="1.1"
+        android:layout_marginTop="4dp"
+        android:gravity="center_vertical"
+        app:layout_constraintBottom_toTopOf="@id/status_translation_barrier"
+        />
+
+    <androidx.constraintlayout.widget.Barrier
+        android:id="@+id/status_translation_barrier"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        app:barrierDirection="bottom"
+        app:constraint_referenced_ids="status_translation_status, status_button_untranslate" />
+
     <com.keylesspalace.tusky.view.ClickableSpanTextView
         android:id="@+id/status_content_warning_description"
         android:layout_width="0dp"
@@ -116,7 +157,7 @@
         android:visibility="gone"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="@id/status_display_name"
-        app:layout_constraintTop_toBottomOf="@id/status_display_name"
+        app:layout_constraintTop_toBottomOf="@id/status_translation_barrier"
         tools:text="content warning which is very long and it doesn't fit"
         tools:visibility="visible" />
 

app/src/main/res/layout/item_status_detailed.xml

@@ -78,6 +78,46 @@
         app:layout_constraintTop_toBottomOf="@id/status_display_name"
         tools:text="\@ConnyDuck\@mastodon.social" />
 
+    <Button
+        android:id="@+id/status_button_untranslate"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/action_show_original"
+        app:layout_constraintTop_toTopOf="@id/status_translation_status"
+        app:layout_constraintBottom_toBottomOf="@id/status_translation_status"
+        style="@style/TuskyButton.TextButton"
+        app:layout_constraintEnd_toEndOf="parent"
+        android:layout_marginEnd="14dp"
+        android:minHeight="0dp"
+        android:visibility="gone"
+        tools:visibility="visible" />
+
+    <TextView
+        android:id="@+id/status_translation_status"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        style="@style/TextSizeSmall"
+        android:layout_marginStart="14dp"
+        tools:text="Translated from blah using service"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/status_avatar"
+        app:layout_constraintEnd_toStartOf="@id/status_button_untranslate"
+        android:minLines="2"
+        android:lineSpacingMultiplier="1.1"
+        android:gravity="center_vertical"
+        android:layout_marginTop="4dp"
+        android:visibility="gone"
+        tools:visibility="visible"
+        android:layout_marginEnd="4dp"/>
+
+    <androidx.constraintlayout.widget.Barrier
+        android:id="@+id/status_translation_barrier"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        app:barrierDirection="bottom"
+        app:constraint_referenced_ids="status_translation_status, status_button_untranslate" />
+
+
     <com.keylesspalace.tusky.view.ClickableSpanTextView
         android:id="@+id/status_content_warning_description"
         android:layout_width="0dp"
@@ -93,7 +133,7 @@
         android:textSize="?attr/status_text_large"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/status_avatar"
+        app:layout_constraintTop_toBottomOf="@id/status_translation_barrier"
         tools:text="CW this is a long long long long long long long long content warning" />
 
     <com.google.android.material.button.MaterialButton

app/src/main/res/menu/status_more.xml

@@ -15,6 +15,9 @@
     <item
         android:id="@+id/status_copy_link"
         android:title="@string/action_copy_link" />
+    <item
+        android:id="@+id/status_translate"
+        android:title="@string/action_translate" />
     <item
         android:id="@+id/status_open_as"
         android:title="@string/action_open_as" />
@@ -24,13 +27,16 @@
     <item
         android:id="@+id/status_mute_conversation"
         android:title="@string/action_mute_conversation" />
-    <item
+
-        android:id="@+id/status_mute"
+    <group>
-        android:title="@string/action_mute" />
+        <item
-    <item
+            android:id="@+id/status_mute"
-        android:id="@+id/status_block"
+            android:title="@string/action_mute" />
-        android:title="@string/action_block" />
+        <item
-    <item
+            android:id="@+id/status_block"
-        android:id="@+id/status_report"
+            android:title="@string/action_block" />
-        android:title="@string/action_report" />
+        <item
-</menu>
+            android:id="@+id/status_report"
+            android:title="@string/action_report" />
+    </group>
+</menu>

app/src/main/res/menu/status_more_for_user.xml

@@ -38,4 +38,4 @@
     <item
         android:id="@+id/status_delete_and_redraft"
         android:title="@string/action_delete_and_redraft" />
-</menu>
+</menu>

app/src/main/res/values/actions.xml

@@ -23,4 +23,5 @@
     <item name="action_open_reblogged_by" type="id" />
     <item name="action_open_faved_by" type="id" />
     <item name="action_more" type="id" />
-</resources>
+    <item name="action_untranslate" type="id" />
+</resources>

app/src/main/res/values/donottranslate.xml

@@ -150,8 +150,13 @@
     </string-array>
 
     <string name="description_status" translatable="false">
-        <!-- Display name, cw?, content?, poll? relative date, edited?, reposted by?, reposted?, favorited?, bookmarked?, username, media?; visibility, fav number?, reblog number?-->
+        <!--
-        %1$s; %2$s; %3$s, %15$s %4$s, %5$s, %6$s; %7$s, %8$s, %9$s, %10$s, %11$s; %12$s, %13$s, %14$s
+         %1$s|display_name %2$s|CW?; %3$s|content?, %15$s|poll?, %4$s|date,
+         %6$s|reposted_by?; %7$s|username, %5$s|edited?, %16$s|translated?, %8$s|reposted?, %9$s|favorited?,
+         %10$s|bookmarked?, %11$s|media?; %12$s|visibility, %13$s|fav_number?,
+         %14$s|reblog_number?
+         -->
+        %1$s; %2$s; %3$s, %15$s, %4$s, %6$s; %7$s, %5$s, %16$s, %8$s, %9$s, %10$s, %11$s; %12$s, %13$s, %14$s
     </string>
 
     <string-array name="rick_roll_domains" translatable="false">

app/src/main/res/values/strings.xml

@@ -211,6 +211,8 @@
     <string name="action_copy_link">Copy the link</string>
     <string name="action_open_as">Open as %s</string>
     <string name="action_share_as">Share as …</string>
+    <string name="action_translate">Translate</string>
+    <string name="action_show_original">Show original</string>
     <string name="download_media">Download media</string>
     <string name="downloading_media">Downloading media</string>
 
@@ -557,6 +559,9 @@
         <item quantity="other">&lt;b>%s&lt;/b> Boosts</item>
     </plurals>
 
+    <string name="label_translating">Translating…</string>
+    <string name="label_translated">Translated from %1$s with %2$s</string>
+
     <string name="title_reblogged_by">Boosted by</string>
     <string name="title_favourited_by">Favorited by</string>
 
@@ -798,6 +803,7 @@
     <string name="ui_error_vote">Voting in poll failed: %s</string>
     <string name="ui_error_accept_follow_request">Accepting follow request failed: %s</string>
     <string name="ui_error_reject_follow_request">Rejecting follow request failed: %s</string>
+    <string name="ui_error_translate">Could not translate: %s</string>
 
     <!-- Success messages, displayed in snackbars, when an action succeeded -->
     <string name="ui_success_accepted_follow_request">Follow request accepted</string>

app/src/test/java/com/keylesspalace/tusky/components/compose/ComposeActivityTest.kt

@@ -38,6 +38,8 @@ import com.keylesspalace.tusky.entity.InstanceV1
 import com.keylesspalace.tusky.entity.StatusConfiguration
 import com.keylesspalace.tusky.network.MastodonApi
 import java.util.Locale
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.SupervisorJob
 import okhttp3.ResponseBody
 import okhttp3.ResponseBody.Companion.toResponseBody
 import org.junit.Assert.assertEquals
@@ -125,7 +127,7 @@ class ComposeActivityTest {
 
         val instanceDaoMock: InstanceDao = mock {
             onBlocking { getInstanceInfo(any()) } doReturn
-                InstanceInfoEntity(instanceDomain, null, null, null, null, null, null, null, null, null, null, null, null, null, null)
+                InstanceInfoEntity(instanceDomain, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null)
             onBlocking { getEmojiInfo(any()) } doReturn
                 EmojisEntity(instanceDomain, emptyList())
         }
@@ -134,7 +136,7 @@ class ComposeActivityTest {
             on { instanceDao() } doReturn instanceDaoMock
         }
 
-        val instanceInfoRepo = InstanceInfoRepository(apiMock, dbMock, accountManagerMock)
+        val instanceInfoRepo = InstanceInfoRepository(apiMock, dbMock, accountManagerMock, CoroutineScope(SupervisorJob()))
 
         val viewModel = ComposeViewModel(
             apiMock,