package com.jakewharton.rxbinding2.view;
import android.view.View;
import android.view.View.OnAttachStateChangeListener;
import com.jakewharton.rxbinding2.internal.Notification;
import io.reactivex.Observable;
import io.reactivex.Observer;
import io.reactivex.android.MainThreadDisposable;
import static com.jakewharton.rxbinding2.internal.Preconditions.checkMainThread;
final class ViewAttachesObservable extends Observable<Object> {
private final boolean callOnAttach;
private final View view;
ViewAttachesObservable(View view, boolean callOnAttach) {
this.view = view;
this.callOnAttach = callOnAttach;
}
@Override protected void subscribeActual(final Observer<? super Object> observer) {
if (!checkMainThread(observer)) {
return;
}
Listener listener = new Listener(view, callOnAttach, observer);
observer.onSubscribe(listener);
view.addOnAttachStateChangeListener(listener);
}
static final class Listener extends MainThreadDisposable implements OnAttachStateChangeListener {
private final View view;
private final boolean callOnAttach;
private final Observer<? super Object> observer;
Listener(View view, boolean callOnAttach, Observer<? super Object> observer) {
this.view = view;
this.callOnAttach = callOnAttach;
this.observer = observer;
}
@Override public void onViewAttachedToWindow(View v) {
if (callOnAttach && !isDisposed()) {
observer.onNext(Notification.INSTANCE);
}
}
@Override public void onViewDetachedFromWindow(View v) {
if (!callOnAttach && !isDisposed()) {
observer.onNext(Notification.INSTANCE);
}
}
@Override protected void onDispose() {
view.removeOnAttachStateChangeListener(this);
}
}
}