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/*
* Copyright © 2018 Samuel Holland <samuel@sholland.org>
* Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
* SPDX-License-Identifier: GPL-2.0-or-later
*/
package com.wireguard.android.fragment;
import android.content.Context;
import android.support.v4.app.Fragment;
import com.wireguard.android.activity.BaseActivity;
import com.wireguard.android.activity.BaseActivity.OnSelectedTunnelChangedListener;
import com.wireguard.android.model.Tunnel;
/**
* Base class for fragments that need to know the currently-selected tunnel. Only does anything when
* attached to a {@code BaseActivity}.
*/
public abstract class BaseFragment extends Fragment implements OnSelectedTunnelChangedListener {
private BaseActivity activity;
protected Tunnel getSelectedTunnel() {
return activity != null ? activity.getSelectedTunnel() : null;
}
@Override
public void onAttach(final Context context) {
super.onAttach(context);
if (context instanceof BaseActivity) {
activity = (BaseActivity) context;
activity.addOnSelectedTunnelChangedListener(this);
} else {
activity = null;
}
}
@Override
public void onDetach() {
if (activity != null)
activity.removeOnSelectedTunnelChangedListener(this);
activity = null;
super.onDetach();
}
protected void setSelectedTunnel(final Tunnel tunnel) {
if (activity != null)
activity.setSelectedTunnel(tunnel);
}
}
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