package com.jakewharton.rxbinding2.view;
import android.view.View;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
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 ViewTreeObserverGlobalLayoutObservable extends Observable<Object> {
private final View view;
ViewTreeObserverGlobalLayoutObservable(View view) {
this.view = view;
}
@Override protected void subscribeActual(Observer<? super Object> observer) {
if (!checkMainThread(observer)) {
return;
}
Listener listener = new Listener(view, observer);
observer.onSubscribe(listener);
view.getViewTreeObserver()
.addOnGlobalLayoutListener(listener);
}
static final class Listener extends MainThreadDisposable implements OnGlobalLayoutListener {
private final View view;
private final Observer<? super Object> observer;
Listener(View view, Observer<? super Object> observer) {
this.view = view;
this.observer = observer;
}
@Override public void onGlobalLayout() {
if (!isDisposed()) {
observer.onNext(Notification.INSTANCE);
}
}
@Override protected void onDispose() {
//noinspection deprecation Change when minSdkVersion = 16
view.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
}
}