package com.jakewharton.rxbinding2.view;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import io.reactivex.Observable;
import io.reactivex.Observer;
import io.reactivex.android.MainThreadDisposable;
import io.reactivex.functions.Predicate;
import static com.jakewharton.rxbinding2.internal.Preconditions.checkMainThread;
final class ViewKeyObservable extends Observable<KeyEvent> {
private final View view;
private final Predicate<? super KeyEvent> handled;
ViewKeyObservable(View view, Predicate<? super KeyEvent> handled) {
this.view = view;
this.handled = handled;
}
@Override protected void subscribeActual(Observer<? super KeyEvent> observer) {
if (!checkMainThread(observer)) {
return;
}
Listener listener = new Listener(view, handled, observer);
observer.onSubscribe(listener);
view.setOnKeyListener(listener);
}
static final class Listener extends MainThreadDisposable implements OnKeyListener {
private final View view;
private final Predicate<? super KeyEvent> handled;
private final Observer<? super KeyEvent> observer;
Listener(View view, Predicate<? super KeyEvent> handled,
Observer<? super KeyEvent> observer) {
this.view = view;
this.handled = handled;
this.observer = observer;
}
@Override public boolean onKey(View v, int keyCode, KeyEvent event) {
if (!isDisposed()) {
try {
if (handled.test(event)) {
observer.onNext(event);
return true;
}
} catch (Exception e) {
observer.onError(e);
dispose();
}
}
return false;
}
@Override protected void onDispose() {
view.setOnKeyListener(null);
}
}
}