Resets the paging3 changes of 3159 back to the (java) fragment code before.

Should be the basis for further not-so-rattling improvements.

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

@@ -20,10 +20,10 @@ import androidx.annotation.DrawableRes
 import androidx.annotation.StringRes
 import androidx.fragment.app.Fragment
 import com.keylesspalace.tusky.components.conversation.ConversationsFragment
-import com.keylesspalace.tusky.components.notifications.NotificationsFragment
 import com.keylesspalace.tusky.components.timeline.TimelineFragment
 import com.keylesspalace.tusky.components.timeline.viewmodel.TimelineViewModel
 import com.keylesspalace.tusky.components.trending.TrendingTagsFragment
+import com.keylesspalace.tusky.fragment.NotificationsFragment
 import java.util.Objects
 
 /** this would be a good case for a sealed class, but that does not work nice with Room */

app/src/main/java/com/keylesspalace/tusky/adapter/FollowRequestViewHolder.kt

@@ -21,12 +21,10 @@ import android.text.Spanned
 import android.text.style.StyleSpan
 import androidx.recyclerview.widget.RecyclerView
 import com.keylesspalace.tusky.R
-import com.keylesspalace.tusky.components.notifications.NotificationsPagingAdapter
 import com.keylesspalace.tusky.databinding.ItemFollowRequestBinding
 import com.keylesspalace.tusky.entity.TimelineAccount
 import com.keylesspalace.tusky.interfaces.AccountActionListener
 import com.keylesspalace.tusky.interfaces.LinkListener
-import com.keylesspalace.tusky.util.StatusDisplayOptions
 import com.keylesspalace.tusky.util.emojify
 import com.keylesspalace.tusky.util.hide
 import com.keylesspalace.tusky.util.loadAvatar
@@ -35,33 +33,12 @@ import com.keylesspalace.tusky.util.setClickableText
 import com.keylesspalace.tusky.util.show
 import com.keylesspalace.tusky.util.unicodeWrap
 import com.keylesspalace.tusky.util.visible
-import com.keylesspalace.tusky.viewdata.NotificationViewData
 
 class FollowRequestViewHolder(
     private val binding: ItemFollowRequestBinding,
-    private val accountActionListener: AccountActionListener,
     private val linkListener: LinkListener,
     private val showHeader: Boolean
-) : NotificationsPagingAdapter.ViewHolder, RecyclerView.ViewHolder(binding.root) {
-
-    override fun bind(
-        viewData: NotificationViewData,
-        payloads: List<*>?,
-        statusDisplayOptions: StatusDisplayOptions
-    ) {
-        // Skip updates with payloads. That indicates a timestamp update, and
-        // this view does not have timestamps.
-        if (!payloads.isNullOrEmpty()) return
-
-        setupWithAccount(
-            viewData.account,
-            statusDisplayOptions.animateAvatars,
-            statusDisplayOptions.animateEmojis,
-            statusDisplayOptions.showBotOverlay
-        )
-
-        setupActionListener(accountActionListener, viewData.account.id)
-    }
+) : RecyclerView.ViewHolder(binding.root) {
 
     fun setupWithAccount(
         account: TimelineAccount,
@@ -70,24 +47,12 @@ class FollowRequestViewHolder(
         showBotOverlay: Boolean
     ) {
         val wrappedName = account.name.unicodeWrap()
-        val emojifiedName: CharSequence = wrappedName.emojify(
-            account.emojis,
-            itemView,
-            animateEmojis
-        )
+        val emojifiedName: CharSequence = wrappedName.emojify(account.emojis, itemView, animateEmojis)
         binding.displayNameTextView.text = emojifiedName
         if (showHeader) {
-            val wholeMessage: String = itemView.context.getString(
-                R.string.notification_follow_request_format,
-                wrappedName
-            )
+            val wholeMessage: String = itemView.context.getString(R.string.notification_follow_request_format, wrappedName)
             binding.notificationTextView.text = SpannableStringBuilder(wholeMessage).apply {
-                setSpan(
-                    StyleSpan(Typeface.BOLD),
-                    0,
-                    wrappedName.length,
-                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE
-                )
+                setSpan(StyleSpan(Typeface.BOLD), 0, wrappedName.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
             }.emojify(account.emojis, itemView, animateEmojis)
         }
         binding.notificationTextView.visible(showHeader)

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

@@ -0,0 +1,713 @@
+/* Copyright 2021 Tusky Contributors
+ *
+ * This file is a part of Tusky.
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Tusky; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+package com.keylesspalace.tusky.adapter;
+
+import android.content.Context;
+import android.graphics.Color;
+import android.graphics.PorterDuff;
+import android.graphics.Typeface;
+import android.graphics.drawable.Drawable;
+import android.text.InputFilter;
+import android.text.SpannableStringBuilder;
+import android.text.Spanned;
+import android.text.TextUtils;
+import android.text.style.StyleSpan;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import androidx.annotation.ColorRes;
+import androidx.annotation.DrawableRes;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.core.content.ContextCompat;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.bumptech.glide.Glide;
+import com.keylesspalace.tusky.R;
+import com.keylesspalace.tusky.databinding.ItemFollowRequestBinding;
+import com.keylesspalace.tusky.databinding.ItemReportNotificationBinding;
+import com.keylesspalace.tusky.entity.Emoji;
+import com.keylesspalace.tusky.entity.Notification;
+import com.keylesspalace.tusky.entity.Status;
+import com.keylesspalace.tusky.entity.TimelineAccount;
+import com.keylesspalace.tusky.interfaces.AccountActionListener;
+import com.keylesspalace.tusky.interfaces.LinkListener;
+import com.keylesspalace.tusky.interfaces.StatusActionListener;
+import com.keylesspalace.tusky.util.AbsoluteTimeFormatter;
+import com.keylesspalace.tusky.util.CardViewMode;
+import com.keylesspalace.tusky.util.CustomEmojiHelper;
+import com.keylesspalace.tusky.util.ImageLoadingHelper;
+import com.keylesspalace.tusky.util.LinkHelper;
+import com.keylesspalace.tusky.util.SmartLengthInputFilter;
+import com.keylesspalace.tusky.util.StatusDisplayOptions;
+import com.keylesspalace.tusky.util.StringUtils;
+import com.keylesspalace.tusky.util.TimestampUtils;
+import com.keylesspalace.tusky.viewdata.NotificationViewData;
+import com.keylesspalace.tusky.viewdata.StatusViewData;
+
+import java.util.Date;
+import java.util.List;
+
+import at.connyduck.sparkbutton.helpers.Utils;
+
+public class NotificationsAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> implements LinkListener{
+
+    public interface AdapterDataSource<T> {
+        int getItemCount();
+
+        T getItemAt(int pos);
+    }
+
+
+    private static final int VIEW_TYPE_STATUS = 0;
+    private static final int VIEW_TYPE_STATUS_NOTIFICATION = 1;
+    private static final int VIEW_TYPE_FOLLOW = 2;
+    private static final int VIEW_TYPE_FOLLOW_REQUEST = 3;
+    private static final int VIEW_TYPE_PLACEHOLDER = 4;
+    private static final int VIEW_TYPE_REPORT = 5;
+    private static final int VIEW_TYPE_UNKNOWN = 6;
+
+    private static final InputFilter[] COLLAPSE_INPUT_FILTER = new InputFilter[]{SmartLengthInputFilter.INSTANCE};
+    private static final InputFilter[] NO_INPUT_FILTER = new InputFilter[0];
+
+    private final String accountId;
+    private StatusDisplayOptions statusDisplayOptions;
+    private final StatusActionListener statusListener;
+    private final NotificationActionListener notificationActionListener;
+    private final AccountActionListener accountActionListener;
+    private final AdapterDataSource<NotificationViewData> dataSource;
+    private final AbsoluteTimeFormatter absoluteTimeFormatter = new AbsoluteTimeFormatter();
+
+    public NotificationsAdapter(String accountId,
+                                AdapterDataSource<NotificationViewData> dataSource,
+                                StatusDisplayOptions statusDisplayOptions,
+                                StatusActionListener statusListener,
+                                NotificationActionListener notificationActionListener,
+                                AccountActionListener accountActionListener) {
+
+        this.accountId = accountId;
+        this.dataSource = dataSource;
+        this.statusDisplayOptions = statusDisplayOptions;
+        this.statusListener = statusListener;
+        this.notificationActionListener = notificationActionListener;
+        this.accountActionListener = accountActionListener;
+    }
+
+    @NonNull
+    @Override
+    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        LayoutInflater inflater = LayoutInflater.from(parent.getContext());
+        switch (viewType) {
+            case VIEW_TYPE_STATUS: {
+                View view = inflater
+                        .inflate(R.layout.item_status, parent, false);
+                return new StatusViewHolder(view);
+            }
+            case VIEW_TYPE_STATUS_NOTIFICATION: {
+                View view = inflater
+                        .inflate(R.layout.item_status_notification, parent, false);
+                return new StatusNotificationViewHolder(view, statusDisplayOptions, absoluteTimeFormatter);
+            }
+            case VIEW_TYPE_FOLLOW: {
+                View view = inflater
+                        .inflate(R.layout.item_follow, parent, false);
+                return new FollowViewHolder(view, statusDisplayOptions);
+            }
+            case VIEW_TYPE_FOLLOW_REQUEST: {
+                ItemFollowRequestBinding binding = ItemFollowRequestBinding.inflate(inflater, parent, false);
+                return new FollowRequestViewHolder(binding, this, true);
+            }
+            case VIEW_TYPE_PLACEHOLDER: {
+                View view = inflater
+                        .inflate(R.layout.item_status_placeholder, parent, false);
+                return new PlaceholderViewHolder(view);
+            }
+            case VIEW_TYPE_REPORT: {
+                ItemReportNotificationBinding binding = ItemReportNotificationBinding.inflate(inflater, parent, false);
+                return new ReportNotificationViewHolder(binding);
+            }
+            default:
+            case VIEW_TYPE_UNKNOWN: {
+                View view = new View(parent.getContext());
+                view.setLayoutParams(
+                        new ViewGroup.LayoutParams(
+                                ViewGroup.LayoutParams.MATCH_PARENT,
+                                Utils.dpToPx(parent.getContext(), 24)
+                        )
+                );
+                return new RecyclerView.ViewHolder(view) {
+                };
+            }
+        }
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int position) {
+        bindViewHolder(viewHolder, position, null);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int position, @NonNull List<Object> payloads) {
+        bindViewHolder(viewHolder, position, payloads);
+    }
+
+    private void bindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int position, @Nullable List<Object> payloads) {
+        Object payloadForHolder = payloads != null && !payloads.isEmpty() ? payloads.get(0) : null;
+        if (position < this.dataSource.getItemCount()) {
+            NotificationViewData notification = dataSource.getItemAt(position);
+            if (notification instanceof NotificationViewData.Placeholder) {
+                if (payloadForHolder == null) {
+                    NotificationViewData.Placeholder placeholder = ((NotificationViewData.Placeholder) notification);
+                    PlaceholderViewHolder holder = (PlaceholderViewHolder) viewHolder;
+                    holder.setup(statusListener, placeholder.isLoading());
+                }
+                return;
+            }
+            NotificationViewData.Concrete concreteNotification =
+                    (NotificationViewData.Concrete) notification;
+            switch (viewHolder.getItemViewType()) {
+                case VIEW_TYPE_STATUS: {
+                    StatusViewHolder holder = (StatusViewHolder) viewHolder;
+                    StatusViewData.Concrete status = concreteNotification.getStatusViewData();
+                    if (status == null) {
+                        /* in some very rare cases servers sends null status even though they should not,
+                         * we have to handle it somehow */
+                        holder.showStatusContent(false);
+                    } else {
+                        if (payloads == null) {
+                            holder.showStatusContent(true);
+                        }
+                        holder.setupWithStatus(status, statusListener, statusDisplayOptions, payloadForHolder);
+                    }
+                    if (concreteNotification.getType() == Notification.Type.POLL) {
+                        holder.setPollInfo(accountId.equals(concreteNotification.getAccount().getId()));
+                    } else {
+                        holder.hideStatusInfo();
+                    }
+                    break;
+                }
+                case VIEW_TYPE_STATUS_NOTIFICATION: {
+                    StatusNotificationViewHolder holder = (StatusNotificationViewHolder) viewHolder;
+                    StatusViewData.Concrete statusViewData = concreteNotification.getStatusViewData();
+                    if (payloadForHolder == null) {
+                        if (statusViewData == null) {
+                            /* in some very rare cases servers sends null status even though they should not,
+                             * we have to handle it somehow */
+                            holder.showNotificationContent(false);
+                        } else {
+                            holder.showNotificationContent(true);
+
+                            Status status = statusViewData.getActionable();
+                            holder.setDisplayName(status.getAccount().getDisplayName(), status.getAccount().getEmojis());
+                            holder.setUsername(status.getAccount().getUsername());
+                            holder.setCreatedAt(status.getCreatedAt());
+
+                            if (concreteNotification.getType() == Notification.Type.STATUS ||
+                                concreteNotification.getType() == Notification.Type.UPDATE) {
+                                holder.setAvatar(status.getAccount().getAvatar(), status.getAccount().getBot());
+                            } else {
+                                holder.setAvatars(status.getAccount().getAvatar(),
+                                        concreteNotification.getAccount().getAvatar());
+                            }
+                        }
+
+                        holder.setMessage(concreteNotification, statusListener);
+                        holder.setupButtons(notificationActionListener,
+                                concreteNotification.getAccount().getId(),
+                                concreteNotification.getId());
+                    } else {
+                        if (payloadForHolder instanceof List)
+                            for (Object item : (List<?>) payloadForHolder) {
+                                if (StatusBaseViewHolder.Key.KEY_CREATED.equals(item) && statusViewData != null) {
+                                    holder.setCreatedAt(statusViewData.getStatus().getActionableStatus().getCreatedAt());
+                                }
+                            }
+                    }
+                    break;
+                }
+                case VIEW_TYPE_FOLLOW: {
+                    if (payloadForHolder == null) {
+                        FollowViewHolder holder = (FollowViewHolder) viewHolder;
+                        holder.setMessage(concreteNotification.getAccount(), concreteNotification.getType() == Notification.Type.SIGN_UP);
+                        holder.setupButtons(notificationActionListener, concreteNotification.getAccount().getId());
+                    }
+                    break;
+                }
+                case VIEW_TYPE_FOLLOW_REQUEST: {
+                    if (payloadForHolder == null) {
+                        FollowRequestViewHolder holder = (FollowRequestViewHolder) viewHolder;
+                        holder.setupWithAccount(concreteNotification.getAccount(), statusDisplayOptions.animateAvatars(), statusDisplayOptions.animateEmojis(), statusDisplayOptions.showBotOverlay());
+                        holder.setupActionListener(accountActionListener, concreteNotification.getAccount().getId());
+                    }
+                    break;
+                }
+                case VIEW_TYPE_REPORT: {
+                    if (payloadForHolder == null) {
+                        ReportNotificationViewHolder holder = (ReportNotificationViewHolder) viewHolder;
+                        holder.setupWithReport(concreteNotification.getAccount(), concreteNotification.getReport(), statusDisplayOptions.animateAvatars(), statusDisplayOptions.animateEmojis());
+                        holder.setupActionListener(notificationActionListener, concreteNotification.getReport().getTargetAccount().getId(), concreteNotification.getAccount().getId(), concreteNotification.getReport().getId());
+                    }
+                }
+                default:
+            }
+        }
+    }
+
+    @Override
+    public int getItemCount() {
+        return dataSource.getItemCount();
+    }
+
+    public void setMediaPreviewEnabled(boolean mediaPreviewEnabled) {
+        this.statusDisplayOptions = statusDisplayOptions.copy(
+                statusDisplayOptions.animateAvatars(),
+                mediaPreviewEnabled,
+                statusDisplayOptions.useAbsoluteTime(),
+                statusDisplayOptions.showBotOverlay(),
+                statusDisplayOptions.useBlurhash(),
+                CardViewMode.NONE,
+                statusDisplayOptions.confirmReblogs(),
+                statusDisplayOptions.confirmFavourites(),
+                statusDisplayOptions.hideStats(),
+                statusDisplayOptions.animateEmojis(),
+                statusDisplayOptions.showStatsInline(),
+                statusDisplayOptions.showSensitiveMedia(),
+                statusDisplayOptions.openSpoiler()
+        );
+    }
+
+    public boolean isMediaPreviewEnabled() {
+        return this.statusDisplayOptions.mediaPreviewEnabled();
+    }
+
+    @Override
+    public int getItemViewType(int position) {
+        NotificationViewData notification = dataSource.getItemAt(position);
+        if (notification instanceof NotificationViewData.Concrete) {
+            NotificationViewData.Concrete concrete = ((NotificationViewData.Concrete) notification);
+            switch (concrete.getType()) {
+                case MENTION:
+                case POLL: {
+                    return VIEW_TYPE_STATUS;
+                }
+                case STATUS:
+                case FAVOURITE:
+                case REBLOG:
+                case UPDATE: {
+                    return VIEW_TYPE_STATUS_NOTIFICATION;
+                }
+                case FOLLOW:
+                case SIGN_UP: {
+                    return VIEW_TYPE_FOLLOW;
+                }
+                case FOLLOW_REQUEST: {
+                    return VIEW_TYPE_FOLLOW_REQUEST;
+                }
+                case REPORT: {
+                    return VIEW_TYPE_REPORT;
+                }
+                default: {
+                    return VIEW_TYPE_UNKNOWN;
+                }
+            }
+        } else if (notification instanceof NotificationViewData.Placeholder) {
+            return VIEW_TYPE_PLACEHOLDER;
+        } else {
+            throw new AssertionError("Unknown notification type");
+        }
+
+
+    }
+
+    public interface NotificationActionListener {
+        void onViewAccount(String id);
+
+        void onViewStatusForNotificationId(String notificationId);
+
+        void onViewReport(String reportId);
+
+        void onExpandedChange(boolean expanded, int position);
+
+        /**
+         * Called when the status {@link android.widget.ToggleButton} responsible for collapsing long
+         * status content is interacted with.
+         *
+         * @param isCollapsed Whether the status content is shown in a collapsed state or fully.
+         * @param position    The position of the status in the list.
+         */
+        void onNotificationContentCollapsedChange(boolean isCollapsed, int position);
+    }
+
+    private static class FollowViewHolder extends RecyclerView.ViewHolder {
+        private final TextView message;
+        private final TextView usernameView;
+        private final TextView displayNameView;
+        private final ImageView avatar;
+        private final StatusDisplayOptions statusDisplayOptions;
+
+        FollowViewHolder(View itemView, StatusDisplayOptions statusDisplayOptions) {
+            super(itemView);
+            message = itemView.findViewById(R.id.notification_text);
+            usernameView = itemView.findViewById(R.id.notification_username);
+            displayNameView = itemView.findViewById(R.id.notification_display_name);
+            avatar = itemView.findViewById(R.id.notification_avatar);
+            this.statusDisplayOptions = statusDisplayOptions;
+        }
+
+        void setMessage(TimelineAccount account, Boolean isSignUp) {
+            Context context = message.getContext();
+
+            String format = context.getString(isSignUp ? R.string.notification_sign_up_format : R.string.notification_follow_format);
+            String wrappedDisplayName = StringUtils.unicodeWrap(account.getName());
+            String wholeMessage = String.format(format, wrappedDisplayName);
+            CharSequence emojifiedMessage = CustomEmojiHelper.emojify(
+                    wholeMessage, account.getEmojis(), message, statusDisplayOptions.animateEmojis()
+            );
+            message.setText(emojifiedMessage);
+
+            String username = context.getString(R.string.post_username_format, account.getUsername());
+            usernameView.setText(username);
+
+            CharSequence emojifiedDisplayName = CustomEmojiHelper.emojify(
+                    wrappedDisplayName, account.getEmojis(), usernameView, statusDisplayOptions.animateEmojis()
+            );
+
+            displayNameView.setText(emojifiedDisplayName);
+
+            int avatarRadius = avatar.getContext().getResources()
+                    .getDimensionPixelSize(R.dimen.avatar_radius_42dp);
+
+            ImageLoadingHelper.loadAvatar(account.getAvatar(), avatar, avatarRadius,
+                    statusDisplayOptions.animateAvatars(), null);
+
+        }
+
+        void setupButtons(final NotificationActionListener listener, final String accountId) {
+            itemView.setOnClickListener(v -> listener.onViewAccount(accountId));
+        }
+    }
+
+    private static class StatusNotificationViewHolder extends RecyclerView.ViewHolder
+            implements View.OnClickListener {
+
+        private final View container;
+        private final TextView message;
+//        private final View statusNameBar;
+        private final TextView displayName;
+        private final TextView username;
+        private final TextView timestampInfo;
+        private final TextView statusContent;
+        private final ImageView statusAvatar;
+        private final ImageView notificationAvatar;
+        private final TextView contentWarningDescriptionTextView;
+        private final Button contentWarningButton;
+        private final Button contentCollapseButton; // TODO: This code SHOULD be based on StatusBaseViewHolder
+        private final StatusDisplayOptions statusDisplayOptions;
+        private final AbsoluteTimeFormatter absoluteTimeFormatter;
+
+        private String accountId;
+        private String notificationId;
+        private NotificationActionListener notificationActionListener;
+        private StatusViewData.Concrete statusViewData;
+
+        private final int avatarRadius48dp;
+        private final int avatarRadius36dp;
+        private final int avatarRadius24dp;
+
+        StatusNotificationViewHolder(
+            View itemView,
+            StatusDisplayOptions statusDisplayOptions,
+            AbsoluteTimeFormatter absoluteTimeFormatter
+        ) {
+            super(itemView);
+            message = itemView.findViewById(R.id.notification_top_text);
+//            statusNameBar = itemView.findViewById(R.id.status_name_bar);
+            displayName = itemView.findViewById(R.id.status_display_name);
+            username = itemView.findViewById(R.id.status_username);
+            timestampInfo = itemView.findViewById(R.id.status_meta_info);
+            statusContent = itemView.findViewById(R.id.notification_content);
+            statusAvatar = itemView.findViewById(R.id.notification_status_avatar);
+            notificationAvatar = itemView.findViewById(R.id.notification_notification_avatar);
+            contentWarningDescriptionTextView = itemView.findViewById(R.id.notification_content_warning_description);
+            contentWarningButton = itemView.findViewById(R.id.notification_content_warning_button);
+            contentCollapseButton = itemView.findViewById(R.id.button_toggle_notification_content);
+
+            container = itemView.findViewById(R.id.notification_container);
+
+            this.statusDisplayOptions = statusDisplayOptions;
+            this.absoluteTimeFormatter = absoluteTimeFormatter;
+
+            int darkerFilter = Color.rgb(123, 123, 123);
+            statusAvatar.setColorFilter(darkerFilter, PorterDuff.Mode.MULTIPLY);
+            notificationAvatar.setColorFilter(darkerFilter, PorterDuff.Mode.MULTIPLY);
+
+            itemView.setOnClickListener(this);
+            message.setOnClickListener(this);
+            statusContent.setOnClickListener(this);
+
+            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);
+        }
+
+        private void showNotificationContent(boolean show) {
+//            statusNameBar.setVisibility(show ? View.VISIBLE : View.GONE);
+            contentWarningDescriptionTextView.setVisibility(show ? View.VISIBLE : View.GONE);
+            contentWarningButton.setVisibility(show ? View.VISIBLE : View.GONE);
+            statusContent.setVisibility(show ? View.VISIBLE : View.GONE);
+            statusAvatar.setVisibility(show ? View.VISIBLE : View.GONE);
+            notificationAvatar.setVisibility(show ? View.VISIBLE : View.GONE);
+        }
+
+        private void setDisplayName(String name, List<Emoji> emojis) {
+            CharSequence emojifiedName = CustomEmojiHelper.emojify(name, emojis, displayName, statusDisplayOptions.animateEmojis());
+            displayName.setText(emojifiedName);
+        }
+
+        private void setUsername(String name) {
+            Context context = username.getContext();
+            String format = context.getString(R.string.post_username_format);
+            String usernameText = String.format(format, name);
+            username.setText(usernameText);
+        }
+
+        protected void setCreatedAt(@Nullable Date createdAt) {
+            if (statusDisplayOptions.useAbsoluteTime()) {
+                timestampInfo.setText(absoluteTimeFormatter.format(createdAt, true));
+            } else {
+                // This is the visible timestampInfo.
+                String readout;
+                /* This one is for screen-readers. Frequently, they would mispronounce timestamps like "17m"
+                 * as 17 meters instead of minutes. */
+                CharSequence readoutAloud;
+                if (createdAt != null) {
+                    long then = createdAt.getTime();
+                    long now = new Date().getTime();
+                    readout = TimestampUtils.getRelativeTimeSpanString(timestampInfo.getContext(), then, now);
+                    readoutAloud = android.text.format.DateUtils.getRelativeTimeSpanString(then, now,
+                            android.text.format.DateUtils.SECOND_IN_MILLIS,
+                            android.text.format.DateUtils.FORMAT_ABBREV_RELATIVE);
+                } else {
+                    // unknown minutes~
+                    readout = "?m";
+                    readoutAloud = "? minutes";
+                }
+                timestampInfo.setText(readout);
+                timestampInfo.setContentDescription(readoutAloud);
+            }
+        }
+
+        Drawable getIconWithColor(Context context, @DrawableRes int drawable, @ColorRes int color) {
+            Drawable icon = ContextCompat.getDrawable(context, drawable);
+            if (icon != null) {
+                icon.setColorFilter(context.getColor(color), PorterDuff.Mode.SRC_ATOP);
+            }
+            return icon;
+        }
+
+        void setMessage(NotificationViewData.Concrete notificationViewData, LinkListener listener) {
+            this.statusViewData = notificationViewData.getStatusViewData();
+
+            String displayName = StringUtils.unicodeWrap(notificationViewData.getAccount().getName());
+            Notification.Type type = notificationViewData.getType();
+
+            Context context = message.getContext();
+            String format;
+            Drawable icon;
+            switch (type) {
+                default:
+                case FAVOURITE: {
+                    icon = getIconWithColor(context, R.drawable.ic_star_24dp, R.color.tusky_orange);
+                    format = context.getString(R.string.notification_favourite_format);
+                    break;
+                }
+                case REBLOG: {
+                    icon = getIconWithColor(context, R.drawable.ic_repeat_24dp, R.color.tusky_blue);
+                    format = context.getString(R.string.notification_reblog_format);
+                    break;
+                }
+                case STATUS: {
+                    icon = getIconWithColor(context, R.drawable.ic_home_24dp, R.color.tusky_blue);
+                    format = context.getString(R.string.notification_subscription_format);
+                    break;
+                }
+                case UPDATE: {
+                    icon = getIconWithColor(context, R.drawable.ic_edit_24dp, R.color.tusky_blue);
+                    format = context.getString(R.string.notification_update_format);
+                    break;
+                }
+            }
+            message.setCompoundDrawablesWithIntrinsicBounds(icon, null, null, null);
+            String wholeMessage = String.format(format, displayName);
+            final SpannableStringBuilder str = new SpannableStringBuilder(wholeMessage);
+            int displayNameIndex = format.indexOf("%s");
+            str.setSpan(
+                    new StyleSpan(Typeface.BOLD),
+                    displayNameIndex,
+                    displayNameIndex + displayName.length(),
+                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE
+            );
+            CharSequence emojifiedText = CustomEmojiHelper.emojify(
+                    str, notificationViewData.getAccount().getEmojis(), message, statusDisplayOptions.animateEmojis()
+            );
+            message.setText(emojifiedText);
+
+            if (statusViewData != null) {
+                boolean hasSpoiler = !TextUtils.isEmpty(statusViewData.getStatus().getSpoilerText());
+                contentWarningDescriptionTextView.setVisibility(hasSpoiler ? View.VISIBLE : View.GONE);
+                contentWarningButton.setVisibility(hasSpoiler ? View.VISIBLE : View.GONE);
+                if (statusViewData.isExpanded()) {
+                    contentWarningButton.setText(R.string.post_content_warning_show_less);
+                } else {
+                    contentWarningButton.setText(R.string.post_content_warning_show_more);
+                }
+
+                contentWarningButton.setOnClickListener(view -> {
+                    if (getBindingAdapterPosition() != RecyclerView.NO_POSITION) {
+                        notificationActionListener.onExpandedChange(!statusViewData.isExpanded(), getBindingAdapterPosition());
+                    }
+                    statusContent.setVisibility(statusViewData.isExpanded() ? View.GONE : View.VISIBLE);
+                });
+
+                setupContentAndSpoiler(listener);
+            }
+
+        }
+
+        void setupButtons(final NotificationActionListener listener, final String accountId,
+                          final String notificationId) {
+            this.notificationActionListener = listener;
+            this.accountId = accountId;
+            this.notificationId = notificationId;
+        }
+
+        void setAvatar(@Nullable String statusAvatarUrl, boolean isBot) {
+            statusAvatar.setPaddingRelative(0, 0, 0, 0);
+
+            ImageLoadingHelper.loadAvatar(statusAvatarUrl,
+                    statusAvatar, avatarRadius48dp, statusDisplayOptions.animateAvatars(), null);
+
+            if (statusDisplayOptions.showBotOverlay() && isBot) {
+                notificationAvatar.setVisibility(View.VISIBLE);
+                Glide.with(notificationAvatar)
+                        .load(R.drawable.bot_badge)
+                        .into(notificationAvatar);
+
+            } else {
+                notificationAvatar.setVisibility(View.GONE);
+            }
+        }
+
+        void setAvatars(@Nullable String statusAvatarUrl, @Nullable String notificationAvatarUrl) {
+            int padding = Utils.dpToPx(statusAvatar.getContext(), 12);
+            statusAvatar.setPaddingRelative(0, 0, padding, padding);
+
+            ImageLoadingHelper.loadAvatar(statusAvatarUrl,
+                    statusAvatar, avatarRadius36dp, statusDisplayOptions.animateAvatars(), null);
+
+            notificationAvatar.setVisibility(View.VISIBLE);
+            ImageLoadingHelper.loadAvatar(notificationAvatarUrl, notificationAvatar,
+                    avatarRadius24dp, statusDisplayOptions.animateAvatars(), null);
+        }
+
+        @Override
+        public void onClick(View v) {
+            if (notificationActionListener == null)
+                return;
+
+            if (v == container || v == statusContent) {
+                notificationActionListener.onViewStatusForNotificationId(notificationId);
+            }
+            else if (v == message) {
+                notificationActionListener.onViewAccount(accountId);
+            }
+        }
+
+        private void setupContentAndSpoiler(final LinkListener listener) {
+
+            boolean shouldShowContentIfSpoiler = statusViewData.isExpanded();
+            boolean hasSpoiler = !TextUtils.isEmpty(statusViewData.getStatus(). getSpoilerText());
+            if (!shouldShowContentIfSpoiler && hasSpoiler) {
+                statusContent.setVisibility(View.GONE);
+            } else {
+                statusContent.setVisibility(View.VISIBLE);
+            }
+
+            Spanned content = statusViewData.getContent();
+            List<Emoji> emojis = statusViewData.getActionable().getEmojis();
+
+            if (statusViewData.isCollapsible() && (statusViewData.isExpanded() || !hasSpoiler)) {
+                contentCollapseButton.setOnClickListener(view -> {
+                    int position = getBindingAdapterPosition();
+                    if (position != RecyclerView.NO_POSITION && notificationActionListener != null) {
+                        notificationActionListener.onNotificationContentCollapsedChange(!statusViewData.isCollapsed(), position);
+                    }
+                });
+
+                contentCollapseButton.setVisibility(View.VISIBLE);
+                if (statusViewData.isCollapsed()) {
+                    contentCollapseButton.setText(R.string.post_content_warning_show_more);
+                    statusContent.setFilters(COLLAPSE_INPUT_FILTER);
+                } else {
+                    contentCollapseButton.setText(R.string.post_content_warning_show_less);
+                    statusContent.setFilters(NO_INPUT_FILTER);
+                }
+            } else {
+                contentCollapseButton.setVisibility(View.GONE);
+                statusContent.setFilters(NO_INPUT_FILTER);
+            }
+
+            CharSequence emojifiedText = CustomEmojiHelper.emojify(
+                    content, emojis, statusContent, statusDisplayOptions.animateEmojis()
+            );
+            LinkHelper.setClickableText(statusContent, emojifiedText, statusViewData.getActionable().getMentions(), statusViewData.getActionable().getTags(), listener);
+
+            CharSequence emojifiedContentWarning;
+            if (statusViewData.getSpoilerText() != null) {
+                emojifiedContentWarning = CustomEmojiHelper.emojify(
+                        statusViewData.getSpoilerText(),
+                        statusViewData.getActionable().getEmojis(),
+                        contentWarningDescriptionTextView,
+                        statusDisplayOptions.animateEmojis()
+                );
+            } else {
+                emojifiedContentWarning = "";
+            }
+            contentWarningDescriptionTextView.setText(emojifiedContentWarning);
+        }
+
+    }
+
+
+    @Override
+    public void onViewTag(@NonNull String tag) {
+
+    }
+
+    @Override
+    public void onViewAccount(@NonNull String id) {
+
+    }
+
+    @Override
+    public void onViewUrl(@NonNull String url) {
+
+    }
+}

app/src/main/java/com/keylesspalace/tusky/adapter/ReportNotificationViewHolder.kt

@@ -20,76 +20,28 @@ import androidx.core.content.ContextCompat
 import androidx.recyclerview.widget.RecyclerView
 import at.connyduck.sparkbutton.helpers.Utils
 import com.keylesspalace.tusky.R
-import com.keylesspalace.tusky.components.notifications.NotificationActionListener
-import com.keylesspalace.tusky.components.notifications.NotificationsPagingAdapter
+import com.keylesspalace.tusky.adapter.NotificationsAdapter.NotificationActionListener
 import com.keylesspalace.tusky.databinding.ItemReportNotificationBinding
 import com.keylesspalace.tusky.entity.Report
 import com.keylesspalace.tusky.entity.TimelineAccount
-import com.keylesspalace.tusky.util.StatusDisplayOptions
 import com.keylesspalace.tusky.util.emojify
 import com.keylesspalace.tusky.util.getRelativeTimeSpanString
 import com.keylesspalace.tusky.util.loadAvatar
 import com.keylesspalace.tusky.util.unicodeWrap
-import com.keylesspalace.tusky.viewdata.NotificationViewData
 import java.util.Date
 
 class ReportNotificationViewHolder(
     private val binding: ItemReportNotificationBinding,
-    private val notificationActionListener: NotificationActionListener
-) : NotificationsPagingAdapter.ViewHolder, RecyclerView.ViewHolder(binding.root) {
+) : RecyclerView.ViewHolder(binding.root) {
 
-    override fun bind(
-        viewData: NotificationViewData,
-        payloads: List<*>?,
-        statusDisplayOptions: StatusDisplayOptions
-    ) {
-        // Skip updates with payloads. That indicates a timestamp update, and
-        // this view does not have timestamps.
-        if (!payloads.isNullOrEmpty()) return
-
-        setupWithReport(
-            viewData.account,
-            viewData.report!!,
-            statusDisplayOptions.animateAvatars,
-            statusDisplayOptions.animateEmojis
-        )
-        setupActionListener(
-            notificationActionListener,
-            viewData.report.targetAccount.id,
-            viewData.account.id,
-            viewData.report.id
-        )
-    }
-
-    private fun setupWithReport(
-        reporter: TimelineAccount,
-        report: Report,
-        animateAvatar: Boolean,
-        animateEmojis: Boolean
-    ) {
-        val reporterName = reporter.name.unicodeWrap().emojify(
-            reporter.emojis,
-            binding.root,
-            animateEmojis
-        )
-        val reporteeName = report.targetAccount.name.unicodeWrap().emojify(
-            report.targetAccount.emojis,
-            itemView,
-            animateEmojis
-        )
-        val icon = ContextCompat.getDrawable(binding.root.context, R.drawable.ic_flag_24dp)
+    fun setupWithReport(reporter: TimelineAccount, report: Report, animateAvatar: Boolean, animateEmojis: Boolean) {
+        val reporterName = reporter.name.unicodeWrap().emojify(reporter.emojis, itemView, animateEmojis)
+        val reporteeName = report.targetAccount.name.unicodeWrap().emojify(report.targetAccount.emojis, itemView, animateEmojis)
+        val icon = ContextCompat.getDrawable(itemView.context, R.drawable.ic_flag_24dp)
 
         binding.notificationTopText.setCompoundDrawablesWithIntrinsicBounds(icon, null, null, null)
-        binding.notificationTopText.text = itemView.context.getString(
-            R.string.notification_header_report_format,
-            reporterName,
-            reporteeName
-        )
-        binding.notificationSummary.text = itemView.context.getString(
-            R.string.notification_summary_report_format,
-            getRelativeTimeSpanString(itemView.context, report.createdAt.time, Date().time),
-            report.status_ids?.size ?: 0
-        )
+        binding.notificationTopText.text = itemView.context.getString(R.string.notification_header_report_format, reporterName, reporteeName)
+        binding.notificationSummary.text = itemView.context.getString(R.string.notification_summary_report_format, getRelativeTimeSpanString(itemView.context, report.createdAt.time, Date().time), report.status_ids?.size ?: 0)
         binding.notificationCategory.text = getTranslatedCategory(itemView.context, report.category)
 
         // Fancy avatar inset
@@ -100,22 +52,17 @@ class ReportNotificationViewHolder(
             report.targetAccount.avatar,
             binding.notificationReporteeAvatar,
             itemView.context.resources.getDimensionPixelSize(R.dimen.avatar_radius_36dp),
-            animateAvatar
+            animateAvatar,
         )
         loadAvatar(
             reporter.avatar,
             binding.notificationReporterAvatar,
             itemView.context.resources.getDimensionPixelSize(R.dimen.avatar_radius_24dp),
-            animateAvatar
+            animateAvatar,
         )
     }
 
-    private fun setupActionListener(
-        listener: NotificationActionListener,
-        reporteeId: String,
-        reporterId: String,
-        reportId: String
-    ) {
+    fun setupActionListener(listener: NotificationActionListener, reporteeId: String, reporterId: String, reportId: String) {
         binding.notificationReporteeAvatar.setOnClickListener {
             val position = bindingAdapterPosition
             if (position != RecyclerView.NO_POSITION) {

app/src/main/java/com/keylesspalace/tusky/appstore/EventsHub.kt

@@ -1,5 +1,7 @@
 package com.keylesspalace.tusky.appstore
 
+import io.reactivex.rxjava3.core.Observable
+import io.reactivex.rxjava3.subjects.PublishSubject
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableSharedFlow
 import javax.inject.Inject
@@ -13,7 +15,12 @@ class EventHub @Inject constructor() {
     private val sharedEventFlow: MutableSharedFlow<Event> = MutableSharedFlow()
     val events: Flow<Event> = sharedEventFlow
 
+    //  TODO remove this old stuff as soon as NotificationsFragment is Kotlin
+    private val eventsSubject = PublishSubject.create<Event>()
+    val eventsObservable: Observable<Event> = eventsSubject
+
     suspend fun dispatch(event: Event) {
         sharedEventFlow.emit(event)
+        eventsSubject.onNext(event)
     }
 }

app/src/main/java/com/keylesspalace/tusky/components/accountlist/adapter/FollowRequestsAdapter.kt

@@ -44,7 +44,6 @@ class FollowRequestsAdapter(
         )
         return FollowRequestViewHolder(
             binding,
-            accountActionListener,
             linkListener,
             showHeader = false
         )

app/src/main/java/com/keylesspalace/tusky/components/notifications/FollowViewHolder.kt

@@ -1,111 +0,0 @@
-/*
- * Copyright 2023 Tusky Contributors
- *
- * This file is a part of Tusky.
- *
- * This program is free software; you can redistribute it and/or modify it under the terms of the
- * GNU General Public License as published by the Free Software Foundation; either version 3 of the
- * License, or (at your option) any later version.
- *
- * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
- * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
- * Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with Tusky; if not,
- * see <http://www.gnu.org/licenses>.
- */
-
-package com.keylesspalace.tusky.components.notifications
-
-import androidx.recyclerview.widget.RecyclerView
-import com.keylesspalace.tusky.R
-import com.keylesspalace.tusky.databinding.ItemFollowBinding
-import com.keylesspalace.tusky.entity.Notification
-import com.keylesspalace.tusky.entity.TimelineAccount
-import com.keylesspalace.tusky.interfaces.LinkListener
-import com.keylesspalace.tusky.util.StatusDisplayOptions
-import com.keylesspalace.tusky.util.emojify
-import com.keylesspalace.tusky.util.loadAvatar
-import com.keylesspalace.tusky.util.parseAsMastodonHtml
-import com.keylesspalace.tusky.util.setClickableText
-import com.keylesspalace.tusky.util.unicodeWrap
-import com.keylesspalace.tusky.viewdata.NotificationViewData
-
-class FollowViewHolder(
-    private val binding: ItemFollowBinding,
-    private val notificationActionListener: NotificationActionListener,
-    private val linkListener: LinkListener
-) : NotificationsPagingAdapter.ViewHolder, RecyclerView.ViewHolder(binding.root) {
-    private val avatarRadius42dp = itemView.context.resources.getDimensionPixelSize(
-        R.dimen.avatar_radius_42dp
-    )
-
-    override fun bind(
-        viewData: NotificationViewData,
-        payloads: List<*>?,
-        statusDisplayOptions: StatusDisplayOptions
-    ) {
-        // Skip updates with payloads. That indicates a timestamp update, and
-        // this view does not have timestamps.
-        if (!payloads.isNullOrEmpty()) return
-
-        setMessage(
-            viewData.account,
-            viewData.type === Notification.Type.SIGN_UP,
-            statusDisplayOptions.animateAvatars,
-            statusDisplayOptions.animateEmojis
-        )
-        setupButtons(notificationActionListener, viewData.account.id)
-    }
-
-    private fun setMessage(
-        account: TimelineAccount,
-        isSignUp: Boolean,
-        animateAvatars: Boolean,
-        animateEmojis: Boolean
-    ) {
-        val context = binding.notificationText.context
-        val format =
-            context.getString(
-                if (isSignUp) {
-                    R.string.notification_sign_up_format
-                } else {
-                    R.string.notification_follow_format
-                }
-            )
-        val wrappedDisplayName = account.name.unicodeWrap()
-        val wholeMessage = String.format(format, wrappedDisplayName)
-        val emojifiedMessage =
-            wholeMessage.emojify(
-                account.emojis,
-                binding.notificationText,
-                animateEmojis
-            )
-        binding.notificationText.text = emojifiedMessage
-        val username = context.getString(R.string.post_username_format, account.username)
-        binding.notificationUsername.text = username
-        val emojifiedDisplayName = wrappedDisplayName.emojify(
-            account.emojis,
-            binding.notificationUsername,
-            animateEmojis
-        )
-        binding.notificationDisplayName.text = emojifiedDisplayName
-        loadAvatar(
-            account.avatar,
-            binding.notificationAvatar,
-            avatarRadius42dp,
-            animateAvatars
-        )
-
-        val emojifiedNote = account.note.parseAsMastodonHtml().emojify(
-            account.emojis,
-            binding.notificationAccountNote,
-            animateEmojis
-        )
-        setClickableText(binding.notificationAccountNote, emojifiedNote, emptyList(), null, linkListener)
-    }
-
-    private fun setupButtons(listener: NotificationActionListener, accountId: String) {
-        binding.root.setOnClickListener { listener.onViewAccount(accountId) }
-    }
-}

app/src/main/java/com/keylesspalace/tusky/components/notifications/NotificationsFragment.kt

@@ -1,691 +0,0 @@
-/*
- * Copyright 2023 Tusky Contributors
- *
- * This file is a part of Tusky.
- *
- * This program is free software; you can redistribute it and/or modify it under the terms of the
- * GNU General Public License as published by the Free Software Foundation; either version 3 of the
- * License, or (at your option) any later version.
- *
- * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
- * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
- * Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with Tusky; if not,
- * see <http://www.gnu.org/licenses>.
- */
-
-package com.keylesspalace.tusky.components.notifications
-
-import android.app.Dialog
-import android.content.DialogInterface
-import android.os.Bundle
-import android.util.Log
-import android.view.LayoutInflater
-import android.view.Menu
-import android.view.MenuInflater
-import android.view.MenuItem
-import android.view.View
-import android.view.ViewGroup
-import androidx.appcompat.app.AlertDialog
-import androidx.core.view.MenuProvider
-import androidx.core.view.isVisible
-import androidx.fragment.app.DialogFragment
-import androidx.fragment.app.viewModels
-import androidx.lifecycle.Lifecycle
-import androidx.lifecycle.lifecycleScope
-import androidx.lifecycle.repeatOnLifecycle
-import androidx.paging.LoadState
-import androidx.recyclerview.widget.DiffUtil
-import androidx.recyclerview.widget.DividerItemDecoration
-import androidx.recyclerview.widget.LinearLayoutManager
-import androidx.recyclerview.widget.RecyclerView
-import androidx.recyclerview.widget.RecyclerView.NO_POSITION
-import androidx.recyclerview.widget.RecyclerView.SCROLL_STATE_IDLE
-import androidx.recyclerview.widget.SimpleItemAnimator
-import androidx.swiperefreshlayout.widget.SwipeRefreshLayout.OnRefreshListener
-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.databinding.FragmentTimelineNotificationsBinding
-import com.keylesspalace.tusky.di.Injectable
-import com.keylesspalace.tusky.di.ViewModelFactory
-import com.keylesspalace.tusky.entity.Notification
-import com.keylesspalace.tusky.entity.Status
-import com.keylesspalace.tusky.fragment.SFragment
-import com.keylesspalace.tusky.interfaces.AccountActionListener
-import com.keylesspalace.tusky.interfaces.ActionButtonActivity
-import com.keylesspalace.tusky.interfaces.ReselectableFragment
-import com.keylesspalace.tusky.interfaces.StatusActionListener
-import com.keylesspalace.tusky.util.ListStatusAccessibilityDelegate
-import com.keylesspalace.tusky.util.openLink
-import com.keylesspalace.tusky.util.viewBinding
-import com.keylesspalace.tusky.viewdata.AttachmentViewData.Companion.list
-import com.keylesspalace.tusky.viewdata.NotificationViewData
-import com.mikepenz.iconics.IconicsDrawable
-import com.mikepenz.iconics.typeface.library.googlematerial.GoogleMaterial
-import com.mikepenz.iconics.utils.colorInt
-import com.mikepenz.iconics.utils.sizeDp
-import kotlinx.coroutines.delay
-import kotlinx.coroutines.flow.collect
-import kotlinx.coroutines.flow.collectLatest
-import kotlinx.coroutines.flow.distinctUntilChangedBy
-import kotlinx.coroutines.flow.filterIsInstance
-import kotlinx.coroutines.flow.flow
-import kotlinx.coroutines.flow.onEach
-import kotlinx.coroutines.launch
-import java.io.IOException
-import javax.inject.Inject
-
-class NotificationsFragment :
-    SFragment(),
-    StatusActionListener,
-    NotificationActionListener,
-    AccountActionListener,
-    OnRefreshListener,
-    MenuProvider,
-    Injectable,
-    ReselectableFragment {
-
-    @Inject
-    lateinit var viewModelFactory: ViewModelFactory
-
-    private val viewModel: NotificationsViewModel by viewModels { viewModelFactory }
-
-    private val binding by viewBinding(FragmentTimelineNotificationsBinding::bind)
-
-    private lateinit var adapter: NotificationsPagingAdapter
-
-    private lateinit var layoutManager: LinearLayoutManager
-
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-
-        adapter = NotificationsPagingAdapter(
-            notificationDiffCallback,
-            accountId = viewModel.account.accountId,
-            statusActionListener = this,
-            notificationActionListener = this,
-            accountActionListener = this,
-            statusDisplayOptions = viewModel.statusDisplayOptions.value
-        )
-    }
-
-    override fun onCreateView(
-        inflater: LayoutInflater,
-        container: ViewGroup?,
-        savedInstanceState: Bundle?
-    ): View {
-        return inflater.inflate(R.layout.fragment_timeline_notifications, container, false)
-    }
-
-    private fun confirmClearNotifications() {
-        AlertDialog.Builder(requireContext())
-            .setMessage(R.string.notification_clear_text)
-            .setPositiveButton(android.R.string.ok) { _: DialogInterface?, _: Int -> clearNotifications() }
-            .setNegativeButton(android.R.string.cancel, null)
-            .show()
-    }
-
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-        super.onViewCreated(view, savedInstanceState)
-        requireActivity().addMenuProvider(this, viewLifecycleOwner, Lifecycle.State.RESUMED)
-
-        // Setup the SwipeRefreshLayout.
-        binding.swipeRefreshLayout.setOnRefreshListener(this)
-        binding.swipeRefreshLayout.setColorSchemeResources(R.color.tusky_blue)
-
-        // Setup the RecyclerView.
-        binding.recyclerView.setHasFixedSize(true)
-        layoutManager = LinearLayoutManager(context)
-        binding.recyclerView.layoutManager = layoutManager
-        binding.recyclerView.setAccessibilityDelegateCompat(
-            ListStatusAccessibilityDelegate(
-                binding.recyclerView,
-                this
-            ) { pos: Int ->
-                val notification = adapter.snapshot().getOrNull(pos)
-                // We support replies only for now
-                if (notification is NotificationViewData) {
-                    notification.statusViewData
-                } else {
-                    null
-                }
-            }
-        )
-        binding.recyclerView.addItemDecoration(
-            DividerItemDecoration(
-                context,
-                DividerItemDecoration.VERTICAL
-            )
-        )
-
-        binding.recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
-            val actionButton = (activity as ActionButtonActivity).actionButton
-
-            override fun onScrolled(view: RecyclerView, dx: Int, dy: Int) {
-                actionButton?.let { fab ->
-                    if (!viewModel.uiState.value.showFabWhileScrolling) {
-                        if (dy > 0 && fab.isShown) {
-                            fab.hide() // Hide when scrolling down
-                        } else if (dy < 0 && !fab.isShown) {
-                            fab.show() // Show when scrolling up
-                        }
-                    } else if (!fab.isShown) {
-                        fab.show()
-                    }
-                }
-            }
-
-            @Suppress("SyntheticAccessor")
-            override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
-                newState != SCROLL_STATE_IDLE && return
-
-                // Save the ID of the first notification visible in the list, so the user's
-                // reading position is always restorable.
-                layoutManager.findFirstVisibleItemPosition().takeIf { it != NO_POSITION }?.let { position ->
-                    adapter.snapshot().getOrNull(position)?.id?.let { id ->
-                        viewModel.accept(InfallibleUiAction.SaveVisibleId(visibleId = id))
-                    }
-                }
-            }
-        })
-
-        binding.recyclerView.adapter = adapter.withLoadStateHeaderAndFooter(
-            header = NotificationsLoadStateAdapter { adapter.retry() },
-            footer = NotificationsLoadStateAdapter { adapter.retry() }
-        )
-
-        (binding.recyclerView.itemAnimator as SimpleItemAnimator?)!!.supportsChangeAnimations =
-            false
-
-        // Signal the user that a refresh has loaded new items above their current position
-        // by scrolling up slightly to disclose the new content
-        adapter.registerAdapterDataObserver(object : RecyclerView.AdapterDataObserver() {
-            override fun onItemRangeInserted(positionStart: Int, itemCount: Int) {
-                if (positionStart == 0 && adapter.itemCount != itemCount) {
-                    binding.recyclerView.post {
-                        if (getView() != null) {
-                            binding.recyclerView.scrollBy(0, Utils.dpToPx(requireContext(), -30))
-                        }
-                    }
-                }
-            }
-        })
-
-        // update post timestamps
-        val updateTimestampFlow = flow {
-            while (true) {
-                delay(60000)
-                emit(Unit)
-            }
-        }.onEach {
-            adapter.notifyItemRangeChanged(0, adapter.itemCount, listOf(StatusBaseViewHolder.Key.KEY_CREATED))
-        }
-
-        viewLifecycleOwner.lifecycleScope.launch {
-            repeatOnLifecycle(Lifecycle.State.STARTED) {
-                launch {
-                    viewModel.pagingData.collectLatest { pagingData ->
-                        Log.d(TAG, "Submitting data to adapter")
-                        adapter.submitData(pagingData)
-                    }
-                }
-
-                // Show errors from the view model as snack bars.
-                //
-                // Errors are shown:
-                // - Indefinitely, so the user has a chance to read and understand
-                //   the message
-                // - With a max of 5 text lines, to allow space for longer errors.
-                //   E.g., on a typical device, an error message like "Bookmarking
-                //   post failed: Unable to resolve host 'mastodon.social': No
-                //   address associated with hostname" is 3 lines.
-                // - With a "Retry" option if the error included a UiAction to retry.
-                launch {
-                    viewModel.uiError.collect { error ->
-                        Log.d(TAG, error.toString())
-                        val message = getString(
-                            error.message,
-                            error.throwable.localizedMessage
-                                ?: getString(R.string.ui_error_unknown)
-                        )
-                        val snackbar = Snackbar.make(
-                            // Without this the FAB will not move out of the way
-                            (activity as ActionButtonActivity).actionButton ?: binding.root,
-                            message,
-                            Snackbar.LENGTH_INDEFINITE
-                        ).setTextMaxLines(5)
-                        error.action?.let { action ->
-                            snackbar.setAction(R.string.action_retry) {
-                                viewModel.accept(action)
-                            }
-                        }
-                        snackbar.show()
-
-                        // The status view has pre-emptively updated its state to show
-                        // that the action succeeded. Since it hasn't, re-bind the view
-                        // to show the correct data.
-                        error.action?.let { action ->
-                            action is StatusAction || return@let
-
-                            val position = adapter.snapshot().indexOfFirst {
-                                it?.statusViewData?.status?.id == (action as StatusAction).statusViewData.id
-                            }
-                            if (position != NO_POSITION) {
-                                adapter.notifyItemChanged(position)
-                            }
-                        }
-                    }
-                }
-
-                // Show successful notification action as brief snackbars, so the
-                // user is clear the action has happened.
-                launch {
-                    viewModel.uiSuccess
-                        .filterIsInstance<NotificationActionSuccess>()
-                        .collect {
-                            Snackbar.make(
-                                (activity as ActionButtonActivity).actionButton ?: binding.root,
-                                getString(it.msg),
-                                Snackbar.LENGTH_SHORT
-                            ).show()
-
-                            when (it) {
-                                // The follow request is no longer valid, refresh the adapter to
-                                // remove it.
-                                is NotificationActionSuccess.AcceptFollowRequest,
-                                is NotificationActionSuccess.RejectFollowRequest -> adapter.refresh()
-                            }
-                        }
-                }
-
-                // Update adapter data when status actions are successful, and re-bind to update
-                // the UI.
-                launch {
-                    viewModel.uiSuccess
-                        .filterIsInstance<StatusActionSuccess>()
-                        .collect {
-                            val indexedViewData = adapter.snapshot()
-                                .withIndex()
-                                .firstOrNull { notificationViewData ->
-                                    notificationViewData.value?.statusViewData?.status?.id ==
-                                        it.action.statusViewData.id
-                                } ?: return@collect
-
-                            val statusViewData =
-                                indexedViewData.value?.statusViewData ?: return@collect
-
-                            val status = when (it) {
-                                is StatusActionSuccess.Bookmark ->
-                                    statusViewData.status.copy(bookmarked = it.action.state)
-                                is StatusActionSuccess.Favourite ->
-                                    statusViewData.status.copy(favourited = it.action.state)
-                                is StatusActionSuccess.Reblog ->
-                                    statusViewData.status.copy(reblogged = it.action.state)
-                                is StatusActionSuccess.VoteInPoll ->
-                                    statusViewData.status.copy(
-                                        poll = it.action.poll.votedCopy(it.action.choices)
-                                    )
-                            }
-                            indexedViewData.value?.statusViewData = statusViewData.copy(
-                                status = status
-                            )
-
-                            adapter.notifyItemChanged(indexedViewData.index)
-                        }
-                }
-
-                // Refresh adapter on mutes and blocks
-                launch {
-                    viewModel.uiSuccess.collectLatest {
-                        when (it) {
-                            is UiSuccess.Block, is UiSuccess.Mute, is UiSuccess.MuteConversation ->
-                                adapter.refresh()
-                            else -> { /* nothing to do */
-                            }
-                        }
-                    }
-                }
-
-                // Collect the uiState. Nothing is done with it, but if you don't collect it then
-                // accessing viewModel.uiState.value (e.g., when the filter dialog is created)
-                // returns an empty object.
-                launch { viewModel.uiState.collect() }
-
-                // Update status display from statusDisplayOptions. If the new options request
-                // relative time display collect the flow to periodically update the timestamp in the list gui elements.
-                launch {
-                    viewModel.statusDisplayOptions
-                        .collectLatest {
-                            // NOTE this this also triggered (emitted?) on resume.
-
-                            adapter.statusDisplayOptions = it
-                            adapter.notifyItemRangeChanged(0, adapter.itemCount, null)
-
-                            if (!it.useAbsoluteTime) {
-                                updateTimestampFlow.collect()
-                            }
-                        }
-                }
-
-                // Update the UI from the loadState
-                adapter.loadStateFlow
-                    .distinctUntilChangedBy { it.refresh }
-                    .collect { loadState ->
-                        binding.recyclerView.isVisible = true
-                        binding.progressBar.isVisible = loadState.refresh is LoadState.Loading &&
-                            !binding.swipeRefreshLayout.isRefreshing
-                        binding.swipeRefreshLayout.isRefreshing =
-                            loadState.refresh is LoadState.Loading && !binding.progressBar.isVisible
-
-                        binding.statusView.isVisible = false
-                        if (loadState.refresh is LoadState.NotLoading) {
-                            if (adapter.itemCount == 0) {
-                                binding.statusView.setup(
-                                    R.drawable.elephant_friend_empty,
-                                    R.string.message_empty
-                                )
-                                binding.recyclerView.isVisible = false
-                                binding.statusView.isVisible = true
-                            } else {
-                                binding.statusView.isVisible = false
-                            }
-                        }
-
-                        if (loadState.refresh is LoadState.Error) {
-                            when ((loadState.refresh as LoadState.Error).error) {
-                                is IOException -> {
-                                    binding.statusView.setup(
-                                        R.drawable.errorphant_offline,
-                                        R.string.error_network
-                                    ) { adapter.retry() }
-                                }
-                                else -> {
-                                    binding.statusView.setup(
-                                        R.drawable.errorphant_error,
-                                        R.string.error_generic
-                                    ) { adapter.retry() }
-                                }
-                            }
-                            binding.recyclerView.isVisible = false
-                            binding.statusView.isVisible = true
-                        }
-                    }
-            }
-        }
-    }
-
-    override fun onCreateMenu(menu: Menu, menuInflater: MenuInflater) {
-        menuInflater.inflate(R.menu.fragment_notifications, menu)
-        val iconColor = MaterialColors.getColor(binding.root, android.R.attr.textColorPrimary)
-        menu.findItem(R.id.action_refresh)?.apply {
-            icon = IconicsDrawable(requireContext(), GoogleMaterial.Icon.gmd_refresh).apply {
-                sizeDp = 20
-                colorInt = iconColor
-            }
-        }
-        menu.findItem(R.id.action_edit_notification_filter)?.apply {
-            icon = IconicsDrawable(requireContext(), GoogleMaterial.Icon.gmd_tune).apply {
-                sizeDp = 20
-                colorInt = iconColor
-            }
-        }
-    }
-
-    override fun onMenuItemSelected(menuItem: MenuItem): Boolean {
-        return when (menuItem.itemId) {
-            R.id.action_refresh -> {
-                binding.swipeRefreshLayout.isRefreshing = true
-                onRefresh()
-                true
-            }
-            R.id.load_newest -> {
-                viewModel.accept(InfallibleUiAction.LoadNewest)
-                true
-            }
-            R.id.action_edit_notification_filter -> {
-                showFilterDialog()
-                true
-            }
-            R.id.action_clear_notifications -> {
-                confirmClearNotifications()
-                true
-            }
-            else -> false
-        }
-    }
-
-    override fun onRefresh() {
-        binding.progressBar.isVisible = false
-        adapter.refresh()
-        NotificationHelper.clearNotificationsForAccount(requireContext(), viewModel.account)
-    }
-
-    override fun onPause() {
-        super.onPause()
-
-        // Save the ID of the first notification visible in the list
-        val position = layoutManager.findFirstVisibleItemPosition()
-        if (position >= 0) {
-            adapter.snapshot().getOrNull(position)?.id?.let { id ->
-                viewModel.accept(InfallibleUiAction.SaveVisibleId(visibleId = id))
-            }
-        }
-    }
-
-    override fun onResume() {
-        super.onResume()
-        NotificationHelper.clearNotificationsForAccount(requireContext(), viewModel.account)
-    }
-
-    override fun onReply(position: Int) {
-        val status = adapter.peek(position)?.statusViewData?.status ?: return
-        super.reply(status)
-    }
-
-    override fun onReblog(reblog: Boolean, position: Int) {
-        val statusViewData = adapter.peek(position)?.statusViewData ?: return
-        viewModel.accept(StatusAction.Reblog(reblog, statusViewData))
-    }
-
-    override fun onFavourite(favourite: Boolean, position: Int) {
-        val statusViewData = adapter.peek(position)?.statusViewData ?: return
-        viewModel.accept(StatusAction.Favourite(favourite, statusViewData))
-    }
-
-    override fun onBookmark(bookmark: Boolean, position: Int) {
-        val statusViewData = adapter.peek(position)?.statusViewData ?: return
-        viewModel.accept(StatusAction.Bookmark(bookmark, statusViewData))
-    }
-
-    override fun onVoteInPoll(position: Int, choices: List<Int>) {
-        val statusViewData = adapter.peek(position)?.statusViewData ?: return
-        val poll = statusViewData.status.poll ?: return
-        viewModel.accept(StatusAction.VoteInPoll(poll, choices, statusViewData))
-    }
-
-    override fun onMore(view: View, position: Int) {
-        val status = adapter.peek(position)?.statusViewData?.status ?: return
-        super.more(status, view, position)
-    }
-
-    override fun onViewMedia(position: Int, attachmentIndex: Int, view: View?) {
-        val status = adapter.peek(position)?.statusViewData?.status ?: return
-        super.viewMedia(
-            attachmentIndex,
-            list(status, viewModel.statusDisplayOptions.value.showSensitiveMedia),
-            view
-        )
-    }
-
-    override fun onViewThread(position: Int) {
-        val status = adapter.peek(position)?.statusViewData?.status ?: return
-        super.viewThread(status.actionableId, status.actionableStatus.url)
-    }
-
-    override fun onOpenReblog(position: Int) {
-        val account = adapter.peek(position)?.account!!
-        onViewAccount(account.id)
-    }
-
-    override fun onExpandedChange(expanded: Boolean, position: Int) {
-        val notificationViewData = adapter.snapshot()[position] ?: return
-        notificationViewData.statusViewData = notificationViewData.statusViewData?.copy(
-            isExpanded = expanded
-        )
-        adapter.notifyItemChanged(position)
-    }
-
-    override fun onContentHiddenChange(isShowing: Boolean, position: Int) {
-        val notificationViewData = adapter.snapshot()[position] ?: return
-        notificationViewData.statusViewData = notificationViewData.statusViewData?.copy(
-            isShowingContent = isShowing
-        )
-        adapter.notifyItemChanged(position)
-    }
-
-    override fun onLoadMore(position: Int) {
-        // Empty -- this fragment doesn't show placeholders
-    }
-
-    override fun onContentCollapsedChange(isCollapsed: Boolean, position: Int) {
-        val notificationViewData = adapter.snapshot()[position] ?: return
-        notificationViewData.statusViewData = notificationViewData.statusViewData?.copy(
-            isCollapsed = isCollapsed
-        )
-        adapter.notifyItemChanged(position)
-    }
-
-    override fun onNotificationContentCollapsedChange(isCollapsed: Boolean, position: Int) {
-        onContentCollapsedChange(isCollapsed, position)
-    }
-
-    override fun clearWarningAction(position: Int) {
-    }
-
-    private fun clearNotifications() {
-        binding.swipeRefreshLayout.isRefreshing = false
-        binding.progressBar.isVisible = false
-        viewModel.accept(FallibleUiAction.ClearNotifications)
-    }
-
-    private fun showFilterDialog() {
-        FilterDialogFragment(viewModel.uiState.value.activeFilter) { filter ->
-            if (viewModel.uiState.value.activeFilter != filter) {
-                viewModel.accept(InfallibleUiAction.ApplyFilter(filter))
-            }
-        }
-            .show(parentFragmentManager, "dialogFilter")
-    }
-
-    override fun onViewTag(tag: String) {
-        super.viewTag(tag)
-    }
-
-    override fun onViewAccount(id: String) {
-        super.viewAccount(id)
-    }
-
-    override fun onMute(mute: Boolean, id: String, position: Int, notifications: Boolean) {
-        adapter.refresh()
-    }
-
-    override fun onBlock(block: Boolean, id: String, position: Int) {
-        adapter.refresh()
-    }
-
-    override fun onRespondToFollowRequest(accept: Boolean, accountId: String, position: Int) {
-        if (accept) {
-            viewModel.accept(NotificationAction.AcceptFollowRequest(accountId))
-        } else {
-            viewModel.accept(NotificationAction.RejectFollowRequest(accountId))
-        }
-    }
-
-    override fun onViewThreadForStatus(status: Status) {
-        super.viewThread(status.actionableId, status.actionableStatus.url)
-    }
-
-    override fun onViewReport(reportId: String) {
-        requireContext().openLink(
-            "https://${viewModel.account.domain}/admin/reports/$reportId"
-        )
-    }
-
-    public override fun removeItem(position: Int) {
-        // Empty -- this fragment doesn't remove items
-    }
-
-    override fun onReselect() {
-        if (isAdded) {
-            layoutManager.scrollToPosition(0)
-        }
-    }
-
-    companion object {
-        private const val TAG = "NotificationsFragment"
-        fun newInstance() = NotificationsFragment()
-
-        private val notificationDiffCallback: DiffUtil.ItemCallback<NotificationViewData> =
-            object : DiffUtil.ItemCallback<NotificationViewData>() {
-                override fun areItemsTheSame(
-                    oldItem: NotificationViewData,
-                    newItem: NotificationViewData
-                ): Boolean {
-                    return oldItem.id == newItem.id
-                }
-
-                override fun areContentsTheSame(
-                    oldItem: NotificationViewData,
-                    newItem: NotificationViewData
-                ): Boolean {
-                    return false
-                }
-
-                override fun getChangePayload(
-                    oldItem: NotificationViewData,
-                    newItem: NotificationViewData
-                ): Any? {
-                    return if (oldItem == newItem) {
-                        //  If items are equal - update timestamp only
-                        listOf(StatusBaseViewHolder.Key.KEY_CREATED)
-                    } else {
-                        // If items are different - update a whole view holder
-                        null
-                    }
-                }
-            }
-    }
-}
-
-class FilterDialogFragment(
-    private val activeFilter: Set<Notification.Type>,
-    private val listener: ((filter: Set<Notification.Type>) -> Unit)
-) : DialogFragment() {
-    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
-        val context = requireContext()
-
-        val items = Notification.Type.visibleTypes.map { getString(it.uiString) }.toTypedArray()
-        val checkedItems = Notification.Type.visibleTypes.map {
-            !activeFilter.contains(it)
-        }.toBooleanArray()
-
-        val builder = AlertDialog.Builder(context)
-            .setTitle(R.string.notifications_apply_filter)
-            .setMultiChoiceItems(items, checkedItems) { _, which, isChecked ->
-                checkedItems[which] = isChecked
-            }
-            .setPositiveButton(android.R.string.ok) { _, _ ->
-                val excludes: MutableSet<Notification.Type> = HashSet()
-                for (i in Notification.Type.visibleTypes.indices) {
-                    if (!checkedItems[i]) excludes.add(Notification.Type.visibleTypes[i])
-                }
-                listener(excludes)
-            }
-            .setNegativeButton(android.R.string.cancel) { _, _ -> }
-        return builder.create()
-    }
-}

app/src/main/java/com/keylesspalace/tusky/components/notifications/NotificationsPagingAdapter.kt

@@ -1,207 +0,0 @@
-/*
- * Copyright 2023 Tusky Contributors
- *
- * This file is a part of Tusky.
- *
- * This program is free software; you can redistribute it and/or modify it under the terms of the
- * GNU General Public License as published by the Free Software Foundation; either version 3 of the
- * License, or (at your option) any later version.
- *
- * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
- * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
- * Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with Tusky; if not,
- * see <http://www.gnu.org/licenses>.
- */
-
-package com.keylesspalace.tusky.components.notifications
-
-import android.view.LayoutInflater
-import android.view.ViewGroup
-import androidx.paging.PagingDataAdapter
-import androidx.recyclerview.widget.DiffUtil
-import androidx.recyclerview.widget.RecyclerView
-import com.keylesspalace.tusky.adapter.FollowRequestViewHolder
-import com.keylesspalace.tusky.adapter.ReportNotificationViewHolder
-import com.keylesspalace.tusky.databinding.ItemFollowBinding
-import com.keylesspalace.tusky.databinding.ItemFollowRequestBinding
-import com.keylesspalace.tusky.databinding.ItemReportNotificationBinding
-import com.keylesspalace.tusky.databinding.ItemStatusBinding
-import com.keylesspalace.tusky.databinding.ItemStatusNotificationBinding
-import com.keylesspalace.tusky.databinding.SimpleListItem1Binding
-import com.keylesspalace.tusky.entity.Notification
-import com.keylesspalace.tusky.entity.Status
-import com.keylesspalace.tusky.interfaces.AccountActionListener
-import com.keylesspalace.tusky.interfaces.StatusActionListener
-import com.keylesspalace.tusky.util.AbsoluteTimeFormatter
-import com.keylesspalace.tusky.util.StatusDisplayOptions
-import com.keylesspalace.tusky.viewdata.NotificationViewData
-
-/** How to present the notification in the UI */
-enum class NotificationViewKind {
-    /** View as the original status */
-    STATUS,
-
-    /** View as the original status, with the interaction type above */
-    NOTIFICATION,
-    FOLLOW,
-    FOLLOW_REQUEST,
-    REPORT,
-    UNKNOWN;
-
-    companion object {
-        fun from(kind: Notification.Type?): NotificationViewKind {
-            return when (kind) {
-                Notification.Type.MENTION,
-                Notification.Type.POLL,
-                Notification.Type.UNKNOWN -> STATUS
-                Notification.Type.FAVOURITE,
-                Notification.Type.REBLOG,
-                Notification.Type.STATUS,
-                Notification.Type.UPDATE -> NOTIFICATION
-                Notification.Type.FOLLOW,
-                Notification.Type.SIGN_UP -> FOLLOW
-                Notification.Type.FOLLOW_REQUEST -> FOLLOW_REQUEST
-                Notification.Type.REPORT -> REPORT
-                null -> UNKNOWN
-            }
-        }
-    }
-}
-
-interface NotificationActionListener {
-    fun onViewAccount(id: String)
-    fun onViewThreadForStatus(status: Status)
-    fun onViewReport(reportId: String)
-
-    /**
-     * Called when the status has a content warning and the visibility of the content behind
-     * the warning is being changed.
-     *
-     * @param expanded the desired state of the content behind the content warning
-     * @param position the adapter position of the view
-     *
-     */
-    fun onExpandedChange(expanded: Boolean, position: Int)
-
-    /**
-     * Called when the status [android.widget.ToggleButton] responsible for collapsing long
-     * status content is interacted with.
-     *
-     * @param isCollapsed Whether the status content is shown in a collapsed state or fully.
-     * @param position    The position of the status in the list.
-     */
-    fun onNotificationContentCollapsedChange(isCollapsed: Boolean, position: Int)
-}
-
-class NotificationsPagingAdapter(
-    diffCallback: DiffUtil.ItemCallback<NotificationViewData>,
-    /** ID of the the account that notifications are being displayed for */
-    private val accountId: String,
-    private val statusActionListener: StatusActionListener,
-    private val notificationActionListener: NotificationActionListener,
-    private val accountActionListener: AccountActionListener,
-    var statusDisplayOptions: StatusDisplayOptions
-) : PagingDataAdapter<NotificationViewData, RecyclerView.ViewHolder>(diffCallback) {
-
-    private val absoluteTimeFormatter = AbsoluteTimeFormatter()
-
-    /** View holders in this adapter must implement this interface */
-    interface ViewHolder {
-        /** Bind the data from the notification and payloads to the view */
-        fun bind(
-            viewData: NotificationViewData,
-            payloads: List<*>?,
-            statusDisplayOptions: StatusDisplayOptions
-        )
-    }
-
-    override fun getItemViewType(position: Int): Int {
-        return NotificationViewKind.from(getItem(position)?.type).ordinal
-    }
-
-    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
-        val inflater = LayoutInflater.from(parent.context)
-
-        return when (NotificationViewKind.entries[viewType]) {
-            NotificationViewKind.STATUS -> {
-                StatusViewHolder(
-                    ItemStatusBinding.inflate(inflater, parent, false),
-                    statusActionListener,
-                    accountId
-                )
-            }
-            NotificationViewKind.NOTIFICATION -> {
-                StatusNotificationViewHolder(
-                    ItemStatusNotificationBinding.inflate(inflater, parent, false),
-                    statusActionListener,
-                    notificationActionListener,
-                    absoluteTimeFormatter
-                )
-            }
-            NotificationViewKind.FOLLOW -> {
-                FollowViewHolder(
-                    ItemFollowBinding.inflate(inflater, parent, false),
-                    notificationActionListener,
-                    statusActionListener
-                )
-            }
-            NotificationViewKind.FOLLOW_REQUEST -> {
-                FollowRequestViewHolder(
-                    ItemFollowRequestBinding.inflate(inflater, parent, false),
-                    accountActionListener,
-                    statusActionListener,
-                    showHeader = true
-                )
-            }
-            NotificationViewKind.REPORT -> {
-                ReportNotificationViewHolder(
-                    ItemReportNotificationBinding.inflate(inflater, parent, false),
-                    notificationActionListener
-                )
-            }
-            else -> {
-                FallbackNotificationViewHolder(
-                    SimpleListItem1Binding.inflate(inflater, parent, false)
-                )
-            }
-        }
-    }
-
-    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
-        bindViewHolder(holder, position, null)
-    }
-
-    override fun onBindViewHolder(
-        holder: RecyclerView.ViewHolder,
-        position: Int,
-        payloads: MutableList<Any>
-    ) {
-        bindViewHolder(holder, position, payloads)
-    }
-
-    private fun bindViewHolder(
-        holder: RecyclerView.ViewHolder,
-        position: Int,
-        payloads: List<*>?
-    ) {
-        getItem(position)?.let { (holder as ViewHolder).bind(it, payloads, statusDisplayOptions) }
-    }
-
-    /**
-     * Notification view holder to use if no other type is appropriate. Should never normally
-     * be used, but is useful when migrating code.
-     */
-    private class FallbackNotificationViewHolder(
-        val binding: SimpleListItem1Binding
-    ) : ViewHolder, RecyclerView.ViewHolder(binding.root) {
-        override fun bind(
-            viewData: NotificationViewData,
-            payloads: List<*>?,
-            statusDisplayOptions: StatusDisplayOptions
-        ) {
-            binding.text1.text = viewData.statusViewData?.content
-        }
-    }
-}

app/src/main/java/com/keylesspalace/tusky/components/notifications/StatusNotificationViewHolder.kt

@@ -1,387 +0,0 @@
-/*
- * Copyright 2023 Tusky Contributors
- *
- * This file is a part of Tusky.
- *
- * This program is free software; you can redistribute it and/or modify it under the terms of the
- * GNU General Public License as published by the Free Software Foundation; either version 3 of the
- * License, or (at your option) any later version.
- *
- * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
- * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
- * Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with Tusky; if not,
- * see <http://www.gnu.org/licenses>.
- */
-
-package com.keylesspalace.tusky.components.notifications
-
-import android.content.Context
-import android.graphics.PorterDuff
-import android.graphics.Typeface
-import android.graphics.drawable.Drawable
-import android.text.InputFilter
-import android.text.SpannableStringBuilder
-import android.text.Spanned
-import android.text.TextUtils
-import android.text.format.DateUtils
-import android.text.style.StyleSpan
-import android.view.View
-import androidx.annotation.ColorRes
-import androidx.annotation.DrawableRes
-import androidx.core.content.ContextCompat
-import androidx.recyclerview.widget.RecyclerView
-import at.connyduck.sparkbutton.helpers.Utils
-import com.bumptech.glide.Glide
-import com.keylesspalace.tusky.R
-import com.keylesspalace.tusky.adapter.StatusBaseViewHolder
-import com.keylesspalace.tusky.databinding.ItemStatusNotificationBinding
-import com.keylesspalace.tusky.entity.Emoji
-import com.keylesspalace.tusky.entity.Notification
-import com.keylesspalace.tusky.interfaces.LinkListener
-import com.keylesspalace.tusky.interfaces.StatusActionListener
-import com.keylesspalace.tusky.util.AbsoluteTimeFormatter
-import com.keylesspalace.tusky.util.SmartLengthInputFilter
-import com.keylesspalace.tusky.util.StatusDisplayOptions
-import com.keylesspalace.tusky.util.emojify
-import com.keylesspalace.tusky.util.getRelativeTimeSpanString
-import com.keylesspalace.tusky.util.loadAvatar
-import com.keylesspalace.tusky.util.setClickableText
-import com.keylesspalace.tusky.util.unicodeWrap
-import com.keylesspalace.tusky.viewdata.NotificationViewData
-import com.keylesspalace.tusky.viewdata.StatusViewData
-import java.util.Date
-
-/**
- * View holder for a status with an activity to be notified about (posted, boosted,
- * favourited, or edited, per [NotificationViewKind.from]).
- *
- * Shows a line with the activity, and who initiated the activity. Clicking this should
- * go to the profile page for the initiator.
- *
- * Displays the original status below that. Clicking this should go to the original
- * status in context.
- */
-internal class StatusNotificationViewHolder(
-    private val binding: ItemStatusNotificationBinding,
-    private val statusActionListener: StatusActionListener,
-    private val notificationActionListener: NotificationActionListener,
-    private val absoluteTimeFormatter: AbsoluteTimeFormatter
-) : NotificationsPagingAdapter.ViewHolder, RecyclerView.ViewHolder(binding.root) {
-    private val avatarRadius48dp = itemView.context.resources.getDimensionPixelSize(
-        R.dimen.avatar_radius_48dp
-    )
-    private val avatarRadius36dp = itemView.context.resources.getDimensionPixelSize(
-        R.dimen.avatar_radius_36dp
-    )
-    private val avatarRadius24dp = itemView.context.resources.getDimensionPixelSize(
-        R.dimen.avatar_radius_24dp
-    )
-
-    override fun bind(
-        viewData: NotificationViewData,
-        payloads: List<*>?,
-        statusDisplayOptions: StatusDisplayOptions
-    ) {
-        val statusViewData = viewData.statusViewData
-        if (payloads.isNullOrEmpty()) {
-            // Hide null statuses. Shouldn't happen according to the spec, but some servers
-            // have been seen to do this (https://github.com/tuskyapp/Tusky/issues/2252)
-            if (statusViewData == null) {
-                showNotificationContent(false)
-            } else {
-                showNotificationContent(true)
-                val (_, _, account, _, _, _, _, createdAt) = statusViewData.actionable
-                setDisplayName(account.name, account.emojis, statusDisplayOptions.animateEmojis)
-                setUsername(account.username)
-                setCreatedAt(createdAt, statusDisplayOptions.useAbsoluteTime)
-                if (viewData.type == Notification.Type.STATUS ||
-                    viewData.type == Notification.Type.UPDATE
-                ) {
-                    setAvatar(
-                        account.avatar,
-                        account.bot,
-                        statusDisplayOptions.animateAvatars,
-                        statusDisplayOptions.showBotOverlay
-                    )
-                } else {
-                    setAvatars(
-                        account.avatar,
-                        viewData.account.avatar,
-                        statusDisplayOptions.animateAvatars
-                    )
-                }
-
-                binding.notificationContainer.setOnClickListener {
-                    notificationActionListener.onViewThreadForStatus(statusViewData.status)
-                }
-                binding.notificationContent.setOnClickListener {
-                    notificationActionListener.onViewThreadForStatus(statusViewData.status)
-                }
-                binding.notificationTopText.setOnClickListener {
-                    notificationActionListener.onViewAccount(viewData.account.id)
-                }
-            }
-            setMessage(viewData, statusActionListener, statusDisplayOptions.animateEmojis)
-        } else {
-            for (item in payloads) {
-                if (StatusBaseViewHolder.Key.KEY_CREATED == item && statusViewData != null) {
-                    setCreatedAt(
-                        statusViewData.status.actionableStatus.createdAt,
-                        statusDisplayOptions.useAbsoluteTime
-                    )
-                }
-            }
-        }
-    }
-
-    private fun showNotificationContent(show: Boolean) {
-        binding.statusDisplayName.visibility = if (show) View.VISIBLE else View.GONE
-        binding.statusUsername.visibility = if (show) View.VISIBLE else View.GONE
-        binding.statusMetaInfo.visibility = if (show) View.VISIBLE else View.GONE
-        binding.notificationContentWarningDescription.visibility =
-            if (show) View.VISIBLE else View.GONE
-        binding.notificationContentWarningButton.visibility =
-            if (show) View.VISIBLE else View.GONE
-        binding.notificationContent.visibility = if (show) View.VISIBLE else View.GONE
-        binding.notificationStatusAvatar.visibility = if (show) View.VISIBLE else View.GONE
-        binding.notificationNotificationAvatar.visibility = if (show) View.VISIBLE else View.GONE
-    }
-
-    private fun setDisplayName(name: String, emojis: List<Emoji>?, animateEmojis: Boolean) {
-        val emojifiedName = name.emojify(emojis, binding.statusDisplayName, animateEmojis)
-        binding.statusDisplayName.text = emojifiedName
-    }
-
-    private fun setUsername(name: String) {
-        val context = binding.statusUsername.context
-        val format = context.getString(R.string.post_username_format)
-        val usernameText = String.format(format, name)
-        binding.statusUsername.text = usernameText
-    }
-
-    private fun setCreatedAt(createdAt: Date?, useAbsoluteTime: Boolean) {
-        if (useAbsoluteTime) {
-            binding.statusMetaInfo.text = absoluteTimeFormatter.format(createdAt, true)
-        } else {
-            // This is the visible timestampInfo.
-            val readout: String
-            /* This one is for screen-readers. Frequently, they would mispronounce timestamps like "17m"
-             * as 17 meters instead of minutes. */
-            val readoutAloud: CharSequence
-            if (createdAt != null) {
-                val then = createdAt.time
-                val now = Date().time
-                readout = getRelativeTimeSpanString(binding.statusMetaInfo.context, then, now)
-                readoutAloud = DateUtils.getRelativeTimeSpanString(
-                    then,
-                    now,
-                    DateUtils.SECOND_IN_MILLIS,
-                    DateUtils.FORMAT_ABBREV_RELATIVE
-                )
-            } else {
-                // unknown minutes~
-                readout = "?m"
-                readoutAloud = "? minutes"
-            }
-            binding.statusMetaInfo.text = readout
-            binding.statusMetaInfo.contentDescription = readoutAloud
-        }
-    }
-
-    private fun getIconWithColor(
-        context: Context,
-        @DrawableRes drawable: Int,
-        @ColorRes color: Int
-    ): Drawable? {
-        val icon = ContextCompat.getDrawable(context, drawable)
-        icon?.setColorFilter(context.getColor(color), PorterDuff.Mode.SRC_ATOP)
-        return icon
-    }
-
-    private fun setAvatar(statusAvatarUrl: String?, isBot: Boolean, animateAvatars: Boolean, showBotOverlay: Boolean) {
-        binding.notificationStatusAvatar.setPaddingRelative(0, 0, 0, 0)
-        loadAvatar(
-            statusAvatarUrl,
-            binding.notificationStatusAvatar,
-            avatarRadius48dp,
-            animateAvatars
-        )
-        if (showBotOverlay && isBot) {
-            binding.notificationNotificationAvatar.visibility = View.VISIBLE
-            Glide.with(binding.notificationNotificationAvatar)
-                .load(R.drawable.bot_badge)
-                .into(binding.notificationNotificationAvatar)
-        } else {
-            binding.notificationNotificationAvatar.visibility = View.GONE
-        }
-    }
-
-    private fun setAvatars(statusAvatarUrl: String?, notificationAvatarUrl: String?, animateAvatars: Boolean) {
-        val padding = Utils.dpToPx(binding.notificationStatusAvatar.context, 12)
-        binding.notificationStatusAvatar.setPaddingRelative(0, 0, padding, padding)
-        loadAvatar(
-            statusAvatarUrl,
-            binding.notificationStatusAvatar,
-            avatarRadius36dp,
-            animateAvatars
-        )
-        binding.notificationNotificationAvatar.visibility = View.VISIBLE
-        loadAvatar(
-            notificationAvatarUrl,
-            binding.notificationNotificationAvatar,
-            avatarRadius24dp,
-            animateAvatars
-        )
-    }
-
-    fun setMessage(
-        notificationViewData: NotificationViewData,
-        listener: LinkListener,
-        animateEmojis: Boolean
-    ) {
-        val statusViewData = notificationViewData.statusViewData
-        val displayName = notificationViewData.account.name.unicodeWrap()
-        val type = notificationViewData.type
-        val context = binding.notificationTopText.context
-        val format: String
-        val icon: Drawable?
-        when (type) {
-            Notification.Type.FAVOURITE -> {
-                icon = getIconWithColor(context, R.drawable.ic_star_24dp, R.color.tusky_orange)
-                format = context.getString(R.string.notification_favourite_format)
-            }
-            Notification.Type.REBLOG -> {
-                icon = getIconWithColor(context, R.drawable.ic_repeat_24dp, R.color.tusky_blue)
-                format = context.getString(R.string.notification_reblog_format)
-            }
-            Notification.Type.STATUS -> {
-                icon = getIconWithColor(context, R.drawable.ic_home_24dp, R.color.tusky_blue)
-                format = context.getString(R.string.notification_subscription_format)
-            }
-            Notification.Type.UPDATE -> {
-                icon = getIconWithColor(context, R.drawable.ic_edit_24dp, R.color.tusky_blue)
-                format = context.getString(R.string.notification_update_format)
-            }
-            else -> {
-                icon = getIconWithColor(context, R.drawable.ic_star_24dp, R.color.tusky_orange)
-                format = context.getString(R.string.notification_favourite_format)
-            }
-        }
-        binding.notificationTopText.setCompoundDrawablesWithIntrinsicBounds(
-            icon,
-            null,
-            null,
-            null
-        )
-        val wholeMessage = String.format(format, displayName)
-        val str = SpannableStringBuilder(wholeMessage)
-        val displayNameIndex = format.indexOf("%s")
-        str.setSpan(
-            StyleSpan(Typeface.BOLD),
-            displayNameIndex,
-            displayNameIndex + displayName.length,
-            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE
-        )
-        val emojifiedText = str.emojify(
-            notificationViewData.account.emojis,
-            binding.notificationTopText,
-            animateEmojis
-        )
-        binding.notificationTopText.text = emojifiedText
-        if (statusViewData != null) {
-            val hasSpoiler = !TextUtils.isEmpty(statusViewData.status.spoilerText)
-            binding.notificationContentWarningDescription.visibility =
-                if (hasSpoiler) View.VISIBLE else View.GONE
-            binding.notificationContentWarningButton.visibility =
-                if (hasSpoiler) View.VISIBLE else View.GONE
-            if (statusViewData.isExpanded) {
-                binding.notificationContentWarningButton.setText(
-                    R.string.post_content_warning_show_less
-                )
-            } else {
-                binding.notificationContentWarningButton.setText(
-                    R.string.post_content_warning_show_more
-                )
-            }
-            binding.notificationContentWarningButton.setOnClickListener {
-                if (bindingAdapterPosition != RecyclerView.NO_POSITION) {
-                    notificationActionListener.onExpandedChange(
-                        !statusViewData.isExpanded,
-                        bindingAdapterPosition
-                    )
-                }
-                binding.notificationContent.visibility =
-                    if (statusViewData.isExpanded) View.GONE else View.VISIBLE
-            }
-            setupContentAndSpoiler(listener, statusViewData, animateEmojis)
-        }
-    }
-
-    private fun setupContentAndSpoiler(
-        listener: LinkListener,
-        statusViewData: StatusViewData.Concrete,
-        animateEmojis: Boolean
-    ) {
-        val shouldShowContentIfSpoiler = statusViewData.isExpanded
-        val hasSpoiler = !TextUtils.isEmpty(statusViewData.status.spoilerText)
-        if (!shouldShowContentIfSpoiler && hasSpoiler) {
-            binding.notificationContent.visibility = View.GONE
-        } else {
-            binding.notificationContent.visibility = View.VISIBLE
-        }
-        val content = statusViewData.content
-        val emojis = statusViewData.actionable.emojis
-        if (statusViewData.isCollapsible && (statusViewData.isExpanded || !hasSpoiler)) {
-            binding.buttonToggleNotificationContent.setOnClickListener {
-                val position = bindingAdapterPosition
-                if (position != RecyclerView.NO_POSITION) {
-                    notificationActionListener.onNotificationContentCollapsedChange(
-                        !statusViewData.isCollapsed,
-                        position
-                    )
-                }
-            }
-            binding.buttonToggleNotificationContent.visibility = View.VISIBLE
-            if (statusViewData.isCollapsed) {
-                binding.buttonToggleNotificationContent.setText(
-                    R.string.post_content_warning_show_more
-                )
-                binding.notificationContent.filters = COLLAPSE_INPUT_FILTER
-            } else {
-                binding.buttonToggleNotificationContent.setText(
-                    R.string.post_content_warning_show_less
-                )
-                binding.notificationContent.filters = NO_INPUT_FILTER
-            }
-        } else {
-            binding.buttonToggleNotificationContent.visibility = View.GONE
-            binding.notificationContent.filters = NO_INPUT_FILTER
-        }
-        val emojifiedText =
-            content.emojify(
-                emojis,
-                binding.notificationContent,
-                animateEmojis
-            )
-        setClickableText(
-            binding.notificationContent,
-            emojifiedText,
-            statusViewData.actionable.mentions,
-            statusViewData.actionable.tags,
-            listener
-        )
-        val emojifiedContentWarning: CharSequence = statusViewData.spoilerText.emojify(
-            statusViewData.actionable.emojis,
-            binding.notificationContentWarningDescription,
-            animateEmojis
-        )
-        binding.notificationContentWarningDescription.text = emojifiedContentWarning
-    }
-
-    companion object {
-        private val COLLAPSE_INPUT_FILTER = arrayOf<InputFilter>(SmartLengthInputFilter)
-        private val NO_INPUT_FILTER = arrayOfNulls<InputFilter>(0)
-    }
-}

app/src/main/java/com/keylesspalace/tusky/components/notifications/StatusViewHolder.kt

@@ -1,60 +0,0 @@
-/*
- * Copyright 2023 Tusky Contributors
- *
- * This file is a part of Tusky.
- *
- * This program is free software; you can redistribute it and/or modify it under the terms of the
- * GNU General Public License as published by the Free Software Foundation; either version 3 of the
- * License, or (at your option) any later version.
- *
- * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
- * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
- * Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with Tusky; if not,
- * see <http://www.gnu.org/licenses>.
- */
-
-package com.keylesspalace.tusky.components.notifications
-
-import com.keylesspalace.tusky.adapter.StatusViewHolder
-import com.keylesspalace.tusky.databinding.ItemStatusBinding
-import com.keylesspalace.tusky.entity.Notification
-import com.keylesspalace.tusky.interfaces.StatusActionListener
-import com.keylesspalace.tusky.util.StatusDisplayOptions
-import com.keylesspalace.tusky.viewdata.NotificationViewData
-
-internal class StatusViewHolder(
-    binding: ItemStatusBinding,
-    private val statusActionListener: StatusActionListener,
-    private val accountId: String
-) : NotificationsPagingAdapter.ViewHolder, StatusViewHolder(binding.root) {
-
-    override fun bind(
-        viewData: NotificationViewData,
-        payloads: List<*>?,
-        statusDisplayOptions: StatusDisplayOptions
-    ) {
-        val statusViewData = viewData.statusViewData
-        if (statusViewData == null) {
-            // Hide null statuses. Shouldn't happen according to the spec, but some servers
-            // have been seen to do this (https://github.com/tuskyapp/Tusky/issues/2252)
-            showStatusContent(false)
-        } else {
-            if (payloads.isNullOrEmpty()) {
-                showStatusContent(true)
-            }
-            setupWithStatus(
-                statusViewData,
-                statusActionListener,
-                statusDisplayOptions,
-                payloads?.firstOrNull()
-            )
-        }
-        if (viewData.type == Notification.Type.POLL) {
-            setPollInfo(accountId == viewData.account.id)
-        } else {
-            hideStatusInfo()
-        }
-    }
-}

app/src/main/java/com/keylesspalace/tusky/di/FragmentBuildersModule.kt

@@ -21,7 +21,6 @@ import com.keylesspalace.tusky.components.account.media.AccountMediaFragment
 import com.keylesspalace.tusky.components.accountlist.AccountListFragment
 import com.keylesspalace.tusky.components.conversation.ConversationsFragment
 import com.keylesspalace.tusky.components.domainblocks.DomainBlocksFragment
-import com.keylesspalace.tusky.components.notifications.NotificationsFragment
 import com.keylesspalace.tusky.components.preference.AccountPreferencesFragment
 import com.keylesspalace.tusky.components.preference.NotificationPreferencesFragment
 import com.keylesspalace.tusky.components.preference.PreferencesFragment
@@ -35,6 +34,7 @@ import com.keylesspalace.tusky.components.timeline.TimelineFragment
 import com.keylesspalace.tusky.components.trending.TrendingTagsFragment
 import com.keylesspalace.tusky.components.viewthread.ViewThreadFragment
 import com.keylesspalace.tusky.components.viewthread.edits.ViewEditsFragment
+import com.keylesspalace.tusky.fragment.NotificationsFragment
 import com.keylesspalace.tusky.fragment.ViewVideoFragment
 import dagger.Module
 import dagger.android.ContributesAndroidInjector

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

@@ -110,6 +110,9 @@ data class Notification(
         }
     }
 
+    /** Helper for Java */
+    fun copyWithStatus(status: Status?): Notification = copy(status = status)
+
     // for Pleroma compatibility that uses Mention type
     fun rewriteToStatusTypeIfNeeded(accountId: String): Notification {
         if (type == Type.MENTION && status != null) {

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

@@ -144,6 +144,14 @@ interface MastodonApi {
         @Query("exclude_types[]") excludes: Set<Notification.Type>? = null
     ): Response<List<Notification>>
 
+    @GET("api/v1/notifications")
+    fun notificationsOld(
+        @Query("max_id") maxId: String?,
+        @Query("since_id") sinceId: String?,
+        @Query("limit") limit: Int?,
+        @Query("exclude_types[]") excludes: Set<Notification.Type>?
+    ): Single<Response<List<Notification>>>
+
     /** Fetch a single notification */
     @GET("api/v1/notifications/{id}")
     suspend fun notification(
@@ -177,6 +185,9 @@ interface MastodonApi {
     @POST("api/v1/notifications/clear")
     suspend fun clearNotifications(): Response<ResponseBody>
 
+    @POST("api/v1/notifications/clear")
+    fun clearNotificationsOld(): Single<ResponseBody>
+
     @FormUrlEncoded
     @PUT("api/v1/media/{mediaId}")
     suspend fun updateMedia(

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

@@ -0,0 +1,74 @@
+package com.keylesspalace.tusky.util
+
+import androidx.arch.core.util.Function
+
+/**
+ * This list implementation can help to keep two lists in sync - like real models and view models.
+ *
+ * Every operation on the main list triggers update of the supplementary list (but not vice versa).
+ *
+ * This makes sure that the main list is always the source of truth.
+ *
+ * Main list is projected to the supplementary list by the passed mapper function.
+ *
+ * Paired list is newer actually exposed and clients are provided with `getPairedCopy()`,
+ * `getPairedItem()` and `setPairedItem()`. This prevents modifications of the
+ * supplementary list size so lists are always have the same length.
+ *
+ * This implementation will not try to recover from exceptional cases so lists may be out of sync
+ * after the exception.
+ *
+ * It is most useful with immutable data because we cannot track changes inside stored objects.
+ *
+ * @param T type of elements in the main list
+ * @param V type of elements in supplementary list
+ * @param mapper Function, which will be used to translate items from the main list to the
+ * supplementary one.
+ * @constructor
+ */
+class PairedList<T, V> (private val mapper: Function<T, out V>) : AbstractMutableList<T>() {
+    private val main: MutableList<T> = ArrayList()
+    private val synced: MutableList<V> = ArrayList()
+
+    val pairedCopy: List<V>
+        get() = ArrayList(synced)
+
+    fun getPairedItem(index: Int): V {
+        return synced[index]
+    }
+
+    fun getPairedItemOrNull(index: Int): V? {
+        return synced.getOrNull(index)
+    }
+
+    fun setPairedItem(index: Int, element: V) {
+        synced[index] = element
+    }
+
+    override fun get(index: Int): T {
+        return main[index]
+    }
+
+    override fun set(index: Int, element: T): T {
+        synced[index] = mapper.apply(element)
+        return main.set(index, element)
+    }
+
+    override fun add(element: T): Boolean {
+        synced.add(mapper.apply(element))
+        return main.add(element)
+    }
+
+    override fun add(index: Int, element: T) {
+        synced.add(index, mapper.apply(element))
+        main.add(index, element)
+    }
+
+    override fun removeAt(index: Int): T {
+        synced.removeAt(index)
+        return main.removeAt(index)
+    }
+
+    override val size: Int
+        get() = main.size
+}

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

@@ -55,12 +55,13 @@ fun Status.toViewData(
     )
 }
 
+@JvmName("notificationToViewData")
 fun Notification.toViewData(
     isShowingContent: Boolean,
     isExpanded: Boolean,
     isCollapsed: Boolean
-): NotificationViewData {
-    return NotificationViewData(
+): NotificationViewData.Concrete {
+    return NotificationViewData.Concrete(
         this.type,
         this.id,
         this.account,

app/src/main/java/com/keylesspalace/tusky/viewdata/NotificationViewData.java

@@ -0,0 +1,138 @@
+/* Copyright 2017 Andrew Dawson
+ *
+ * This file is a part of Tusky.
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Tusky; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+package com.keylesspalace.tusky.viewdata;
+
+import androidx.annotation.Nullable;
+
+import com.keylesspalace.tusky.entity.Notification;
+import com.keylesspalace.tusky.entity.Report;
+import com.keylesspalace.tusky.entity.TimelineAccount;
+
+import java.util.Objects;
+
+/**
+ * Created by charlag on 12/07/2017.
+ * <p>
+ * Class to represent data required to display either a notification or a placeholder.
+ * It is either a {@link Placeholder} or a {@link Concrete}.
+ * It is modelled this way because close relationship between placeholder and concrete notification
+ * is fine in this case. Placeholder case is not modelled as a type of notification because
+ * invariants would be violated and because it would model domain incorrectly. It is preferable to
+ * {@link com.keylesspalace.tusky.util.Either} because class hierarchy is cheaper, faster and
+ * more native.
+ */
+public abstract class NotificationViewData {
+    private NotificationViewData() {
+    }
+
+    public abstract long getViewDataId();
+
+    public abstract boolean deepEquals(NotificationViewData other);
+
+    public static final class Concrete extends NotificationViewData {
+        private final Notification.Type type;
+        private final String id;
+        private final TimelineAccount account;
+        @Nullable
+        private final StatusViewData.Concrete statusViewData;
+        @Nullable
+        private final Report report;
+
+        public Concrete(Notification.Type type, String id, TimelineAccount account,
+                        @Nullable StatusViewData.Concrete statusViewData, @Nullable Report report) {
+            this.type = type;
+            this.id = id;
+            this.account = account;
+            this.statusViewData = statusViewData;
+            this.report = report;
+        }
+
+        public Notification.Type getType() {
+            return type;
+        }
+
+        public String getId() {
+            return id;
+        }
+
+        public TimelineAccount getAccount() {
+            return account;
+        }
+
+        @Nullable
+        public StatusViewData.Concrete getStatusViewData() {
+            return statusViewData;
+        }
+
+        @Nullable
+        public Report getReport() {
+            return report;
+        }
+
+        @Override
+        public long getViewDataId() {
+            return id.hashCode();
+        }
+
+        @Override
+        public boolean deepEquals(NotificationViewData o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            Concrete concrete = (Concrete) o;
+            return type == concrete.type &&
+                    Objects.equals(id, concrete.id) &&
+                    account.getId().equals(concrete.account.getId()) &&
+                    (Objects.equals(statusViewData, concrete.statusViewData)) &&
+                    (Objects.equals(report, concrete.report));
+        }
+
+        @Override
+        public int hashCode() {
+
+            return Objects.hash(type, id, account, statusViewData);
+        }
+
+        public Concrete copyWithStatus(@Nullable StatusViewData.Concrete statusViewData) {
+            return new Concrete(type, id, account, statusViewData, report);
+        }
+    }
+
+    public static final class Placeholder extends NotificationViewData {
+        private final long id;
+        private final boolean isLoading;
+
+        public Placeholder(long id, boolean isLoading) {
+            this.id = id;
+            this.isLoading = isLoading;
+        }
+
+        public boolean isLoading() {
+            return isLoading;
+        }
+
+        @Override
+        public long getViewDataId() {
+            return id;
+        }
+
+        @Override
+        public boolean deepEquals(NotificationViewData other) {
+            if (!(other instanceof Placeholder)) return false;
+            Placeholder that = (Placeholder) other;
+            return isLoading == that.isLoading && id == that.id;
+        }
+    }
+}

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

@@ -34,7 +34,7 @@ import com.keylesspalace.tusky.entity.Notification
 import com.keylesspalace.tusky.entity.Report
 import com.keylesspalace.tusky.entity.TimelineAccount
 
-data class NotificationViewData(
+data class NotificationViewDataX(
     val type: Notification.Type,
     val id: String,
     val account: TimelineAccount,

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

@@ -92,6 +92,21 @@ sealed class StatusViewData {
             this.isCollapsible = shouldTrimStatus(this.content)
         }
 
+        /** Helper for Java */
+        fun copyWithStatus(status: Status): Concrete {
+            return copy(status = status)
+        }
+
+        /** Helper for Java */
+        fun copyWithExpanded(isExpanded: Boolean): Concrete {
+            return copy(isExpanded = isExpanded)
+        }
+
+        /** Helper for Java */
+        fun copyWithShowingContent(isShowingContent: Boolean): Concrete {
+            return copy(isShowingContent = isShowingContent)
+        }
+
         /** Helper for Java */
         fun copyWithCollapsed(isCollapsed: Boolean): Concrete {
             return copy(isCollapsed = isCollapsed)

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

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical" android:layout_width="200dp"
+    android:layout_height="wrap_content"
+    android:background="?android:attr/windowBackground">
+    <ListView
+        android:id="@+id/listView"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1" />
+    <Button
+        android:id="@+id/buttonApply"
+        style="@style/TuskyButton.TextButton"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_weight="0"
+        android:text="@string/filter_apply"
+        android:textSize="?attr/status_text_medium" />
+</LinearLayout>