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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.tv.dvr.ui.browse;
import android.app.Activity;
import android.content.Context;
import android.support.annotation.CallSuper;
import android.support.v17.leanback.widget.Presenter;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import com.android.tv.common.SoftPreconditions;
import com.android.tv.dvr.ui.DvrUiHelper;
import java.util.HashSet;
import java.util.Set;
/**
* An abstract class to present DVR items in {@link RecordingCardView}, which is mainly used in
* {@link DvrBrowseFragment}. DVR items might include:
* {@link com.android.tv.dvr.data.ScheduledRecording},
* {@link com.android.tv.dvr.data.RecordedProgram}, and
* {@link com.android.tv.dvr.data.SeriesRecording}.
*/
public abstract class DvrItemPresenter<T> extends Presenter {
protected final Context mContext;
private final Set<DvrItemViewHolder> mBoundViewHolders = new HashSet<>();
private final OnClickListener mOnClickListener = onCreateOnClickListener();
protected class DvrItemViewHolder extends ViewHolder {
DvrItemViewHolder(RecordingCardView view) {
super(view);
}
protected RecordingCardView getView() {
return (RecordingCardView) view;
}
protected void onBound(T item) { }
protected void onUnbound() { }
}
DvrItemPresenter(Context context) {
mContext = context;
}
@Override
public final ViewHolder onCreateViewHolder(ViewGroup parent) {
return onCreateDvrItemViewHolder();
}
@Override
public final void onBindViewHolder(ViewHolder baseHolder, Object item) {
DvrItemViewHolder viewHolder;
T dvrItem;
try {
viewHolder = (DvrItemViewHolder) baseHolder;
Class<T> itemType = (Class<T>) item.getClass();
dvrItem = itemType.cast(item);
} catch (ClassCastException e) {
SoftPreconditions.checkState(false);
return;
}
viewHolder.view.setTag(item);
viewHolder.view.setOnClickListener(mOnClickListener);
onBindDvrItemViewHolder(viewHolder, dvrItem);
viewHolder.onBound(dvrItem);
mBoundViewHolders.add(viewHolder);
}
@Override
@CallSuper
public void onUnbindViewHolder(ViewHolder baseHolder) {
DvrItemViewHolder viewHolder = (DvrItemViewHolder) baseHolder;
mBoundViewHolders.remove(viewHolder);
viewHolder.onUnbound();
viewHolder.view.setTag(null);
viewHolder.view.setOnClickListener(null);
}
/**
* Unbinds all bound view holders.
*/
public void unbindAllViewHolders() {
// When browse fragments are destroyed, RecyclerView would not call presenters'
// onUnbindViewHolder(). We should handle it by ourselves to prevent resources leaks.
for (ViewHolder viewHolder : new HashSet<>(mBoundViewHolders)) {
onUnbindViewHolder(viewHolder);
}
}
/**
* This method will be called when a {@link DvrItemViewHolder} is needed to be created.
*/
abstract protected DvrItemViewHolder onCreateDvrItemViewHolder();
/**
* This method will be called when a {@link DvrItemViewHolder} is bound to a DVR item.
*/
abstract protected void onBindDvrItemViewHolder(DvrItemViewHolder viewHolder, T item);
/**
* Returns context.
*/
protected Context getContext() {
return mContext;
}
/**
* Creates {@link OnClickListener} for DVR library's card views.
*/
protected OnClickListener onCreateOnClickListener() {
return new OnClickListener() {
@Override
public void onClick(View view) {
if (view instanceof RecordingCardView) {
RecordingCardView v = (RecordingCardView) view;
DvrUiHelper.startDetailsActivity((Activity) v.getContext(),
v.getTag(), v.getImageView(), false);
}
}
};
}
}
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