Yuito-app-android/app/src/main/java/com/keylesspalace/tusky/TimelineAdapter.java

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Java
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/* Copyright 2017 Andrew Dawson
*
* This file is part of Tusky.
*
* Tusky 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/>. */
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package com.keylesspalace.tusky;
import android.support.annotation.Nullable;
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import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;
class TimelineAdapter extends RecyclerView.Adapter implements AdapterItemRemover {
private static final int VIEW_TYPE_STATUS = 0;
private static final int VIEW_TYPE_FOOTER = 1;
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private List<Status> statuses;
private StatusActionListener statusListener;
private FooterActionListener footerListener;
private FooterViewHolder.State footerState;
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TimelineAdapter(StatusActionListener statusListener,
FooterActionListener footerListener) {
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super();
statuses = new ArrayList<>();
this.statusListener = statusListener;
this.footerListener = footerListener;
footerState = FooterViewHolder.State.LOADING;
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}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
switch (viewType) {
default:
case VIEW_TYPE_STATUS: {
View view = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.item_status, viewGroup, false);
return new StatusViewHolder(view);
}
case VIEW_TYPE_FOOTER: {
View view = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.item_footer, viewGroup, false);
return new FooterViewHolder(view);
}
}
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}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
if (position < statuses.size()) {
StatusViewHolder holder = (StatusViewHolder) viewHolder;
Status status = statuses.get(position);
holder.setupWithStatus(status, statusListener, position);
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} else {
FooterViewHolder holder = (FooterViewHolder) viewHolder;
holder.setState(footerState);
}
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}
@Override
public int getItemCount() {
return statuses.size() + 1;
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}
@Override
public int getItemViewType(int position) {
if (position == statuses.size()) {
return VIEW_TYPE_FOOTER;
} else {
return VIEW_TYPE_STATUS;
}
}
int update(List<Status> newStatuses) {
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int scrollToPosition;
if (statuses == null || statuses.isEmpty()) {
statuses = newStatuses;
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scrollToPosition = 0;
} else {
int index = newStatuses.indexOf(statuses.get(0));
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if (index == -1) {
statuses.addAll(0, newStatuses);
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scrollToPosition = 0;
} else {
statuses.addAll(0, newStatuses.subList(0, index));
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scrollToPosition = index;
}
}
notifyDataSetChanged();
return scrollToPosition;
}
void addItems(List<Status> newStatuses) {
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int end = statuses.size();
statuses.addAll(newStatuses);
notifyItemRangeInserted(end, newStatuses.size());
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}
public void removeItem(int position) {
statuses.remove(position);
notifyItemRemoved(position);
}
@Nullable Status getItem(int position) {
if (position >= 0 && position < statuses.size()) {
return statuses.get(position);
}
return null;
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}
void setFooterState(FooterViewHolder.State state) {
footerState = state;
}
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}