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

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/* Copyright 2017 Andrew Dawson
*
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* This file is a part of Tusky.
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*
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* 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.
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*
* Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
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* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
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*
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* 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.adapter;
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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;
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import com.keylesspalace.tusky.R;
import com.keylesspalace.tusky.interfaces.StatusActionListener;
import com.keylesspalace.tusky.viewdata.StatusViewData;
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import java.util.ArrayList;
import java.util.List;
public class TimelineAdapter extends RecyclerView.Adapter {
private static final int VIEW_TYPE_STATUS = 0;
private static final int VIEW_TYPE_FOOTER = 1;
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private static final int VIEW_TYPE_PLACEHOLDER = 2;
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private List<StatusViewData> statuses;
private StatusActionListener statusListener;
private FooterViewHolder.State footerState;
private boolean mediaPreviewEnabled;
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public TimelineAdapter(StatusActionListener statusListener) {
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super();
statuses = new ArrayList<>();
this.statusListener = statusListener;
footerState = FooterViewHolder.State.END;
mediaPreviewEnabled = true;
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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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case VIEW_TYPE_PLACEHOLDER: {
View view = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.item_status_placeholder, viewGroup, false);
return new PlaceholderViewHolder(view);
}
}
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}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
if (position < statuses.size()) {
StatusViewData status = statuses.get(position);
if (status instanceof StatusViewData.Placeholder) {
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PlaceholderViewHolder holder = (PlaceholderViewHolder) viewHolder;
holder.setup(!((StatusViewData.Placeholder) status).isLoading(), statusListener);
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} else {
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StatusViewHolder holder = (StatusViewHolder) viewHolder;
holder.setupWithStatus((StatusViewData.Concrete) status,
statusListener, mediaPreviewEnabled);
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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 {
if (statuses.get(position) instanceof StatusViewData.Placeholder) {
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return VIEW_TYPE_PLACEHOLDER;
} else {
return VIEW_TYPE_STATUS;
}
}
}
public void update(@Nullable List<StatusViewData> newStatuses) {
if (newStatuses == null || newStatuses.isEmpty()) {
return;
}
statuses.clear();
statuses.addAll(newStatuses);
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notifyDataSetChanged();
}
public void addItems(List<StatusViewData> newStatuses) {
statuses.addAll(newStatuses);
notifyItemRangeInserted(statuses.size(), newStatuses.size());
}
public void changeItem(int position, StatusViewData newData, boolean notifyAdapter) {
statuses.set(position, newData);
if (notifyAdapter) notifyItemChanged(position);
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}
public void clear() {
statuses.clear();
notifyDataSetChanged();
}
public void setFooterState(FooterViewHolder.State newFooterState) {
FooterViewHolder.State oldValue = footerState;
footerState = newFooterState;
if (footerState != oldValue) {
notifyItemChanged(statuses.size());
}
}
public void setMediaPreviewEnabled(boolean enabled) {
mediaPreviewEnabled = enabled;
}
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}