package com.jakewharton.rxbinding2.support.v7.widget;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.RecyclerView.OnChildAttachStateChangeListener;
import android.view.View;
import io.reactivex.Observable;
import io.reactivex.Observer;
import io.reactivex.android.MainThreadDisposable;
import static com.jakewharton.rxbinding2.internal.Preconditions.checkMainThread;
final class RecyclerViewChildAttachStateChangeEventObservable
extends Observable<RecyclerViewChildAttachStateChangeEvent> {
private final RecyclerView view;
RecyclerViewChildAttachStateChangeEventObservable(RecyclerView recyclerView) {
this.view = recyclerView;
}
@Override protected void subscribeActual(
Observer<? super RecyclerViewChildAttachStateChangeEvent> observer) {
if (!checkMainThread(observer)) {
return;
}
Listener listener = new Listener(view, observer);
observer.onSubscribe(listener);
view.addOnChildAttachStateChangeListener(listener);
}
final class Listener extends MainThreadDisposable implements OnChildAttachStateChangeListener {
private final RecyclerView recyclerView;
private final Observer<? super RecyclerViewChildAttachStateChangeEvent> observer;
Listener(RecyclerView recyclerView,
Observer<? super RecyclerViewChildAttachStateChangeEvent> observer) {
this.recyclerView = recyclerView;
this.observer = observer;
}
@Override public void onChildViewAttachedToWindow(View childView) {
if (!isDisposed()) {
observer.onNext(RecyclerViewChildAttachEvent.create(recyclerView, childView));
}
}
@Override public void onChildViewDetachedFromWindow(View childView) {
if (!isDisposed()) {
observer.onNext(RecyclerViewChildDetachEvent.create(recyclerView, childView));
}
}
@Override protected void onDispose() {
recyclerView.removeOnChildAttachStateChangeListener(this);
}
}
}