package com.jakewharton.rxbinding2.support.v4.view;
import android.support.v4.view.MenuItemCompat.OnActionExpandListener;
import android.view.MenuItem;
import com.jakewharton.rxbinding2.view.MenuItemActionViewCollapseEvent;
import com.jakewharton.rxbinding2.view.MenuItemActionViewEvent;
import com.jakewharton.rxbinding2.view.MenuItemActionViewExpandEvent;
import io.reactivex.Observable;
import io.reactivex.Observer;
import io.reactivex.android.MainThreadDisposable;
import io.reactivex.functions.Predicate;
import static android.support.v4.view.MenuItemCompat.setOnActionExpandListener;
import static com.jakewharton.rxbinding2.internal.Preconditions.checkMainThread;
final class MenuItemActionViewEventObservable extends Observable<MenuItemActionViewEvent> {
private final MenuItem menuItem;
private final Predicate<? super MenuItemActionViewEvent> handled;
MenuItemActionViewEventObservable(MenuItem menuItem,
Predicate<? super MenuItemActionViewEvent> handled) {
this.menuItem = menuItem;
this.handled = handled;
}
@Override protected void subscribeActual(Observer<? super MenuItemActionViewEvent> observer) {
if (!checkMainThread(observer)) {
return;
}
Listener listener = new Listener(menuItem, handled, observer);
observer.onSubscribe(listener);
setOnActionExpandListener(menuItem, listener);
}
static final class Listener extends MainThreadDisposable implements OnActionExpandListener {
private final MenuItem menuItem;
private final Predicate<? super MenuItemActionViewEvent> handled;
private final Observer<? super MenuItemActionViewEvent> observer;
Listener(MenuItem menuItem, Predicate<? super MenuItemActionViewEvent> handled,
Observer<? super MenuItemActionViewEvent> observer) {
this.menuItem = menuItem;
this.handled = handled;
this.observer = observer;
}
@Override public boolean onMenuItemActionExpand(MenuItem item) {
return onEvent(MenuItemActionViewExpandEvent.create(item));
}
@Override public boolean onMenuItemActionCollapse(MenuItem item) {
return onEvent(MenuItemActionViewCollapseEvent.create(item));
}
private boolean onEvent(MenuItemActionViewEvent 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() {
setOnActionExpandListener(menuItem, null);
}
}
}