package com.jakewharton.rxbinding2.view;
import android.view.View;
import android.view.View.OnLayoutChangeListener;
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 ViewLayoutChangeObservable extends Observable<Object> {
private final View view;
ViewLayoutChangeObservable(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.addOnLayoutChangeListener(listener);
}
static final class Listener extends MainThreadDisposable implements OnLayoutChangeListener {
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 onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft,
int oldTop, int oldRight, int oldBottom) {
if (!isDisposed()) {
observer.onNext(Notification.INSTANCE);
}
}
@Override protected void onDispose() {
view.removeOnLayoutChangeListener(this);
}
}
}