263 lines
7.0 KiB
Java
263 lines
7.0 KiB
Java
/*
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* Copyright (C) 2012-2015 Tobias Brunner
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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package org.strongswan.android.ui;
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import android.content.Context;
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import android.os.Bundle;
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import android.text.TextUtils;
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import android.view.Menu;
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import android.view.MenuInflater;
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import android.view.MenuItem;
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import android.view.View;
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import android.widget.ListView;
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import android.widget.SearchView;
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import android.widget.SearchView.OnQueryTextListener;
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import org.strongswan.android.R;
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import org.strongswan.android.logic.TrustedCertificateManager;
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import org.strongswan.android.logic.TrustedCertificateManager.TrustedCertificateSource;
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import org.strongswan.android.security.TrustedCertificateEntry;
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import org.strongswan.android.ui.adapter.TrustedCertificateAdapter;
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import java.security.cert.X509Certificate;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Hashtable;
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import java.util.List;
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import java.util.Map.Entry;
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import java.util.Observable;
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import java.util.Observer;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import androidx.fragment.app.ListFragment;
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import androidx.loader.app.LoaderManager;
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import androidx.loader.app.LoaderManager.LoaderCallbacks;
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import androidx.loader.content.AsyncTaskLoader;
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import androidx.loader.content.Loader;
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public class TrustedCertificateListFragment extends ListFragment implements LoaderCallbacks<List<TrustedCertificateEntry>>, OnQueryTextListener
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{
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public static final String EXTRA_CERTIFICATE_SOURCE = "certificate_source";
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private OnTrustedCertificateSelectedListener mListener;
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private TrustedCertificateAdapter mAdapter;
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private TrustedCertificateSource mSource = TrustedCertificateSource.SYSTEM;
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/**
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* The activity containing this fragment should implement this interface
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*/
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public interface OnTrustedCertificateSelectedListener
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{
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public void onTrustedCertificateSelected(TrustedCertificateEntry selected);
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}
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@Override
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public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState)
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{
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super.onViewCreated(view, savedInstanceState);
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setHasOptionsMenu(true);
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setEmptyText(getString(R.string.no_certificates));
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mAdapter = new TrustedCertificateAdapter(getActivity());
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setListAdapter(mAdapter);
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setListShown(false);
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Bundle arguments = getArguments();
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if (arguments != null)
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{
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mSource = (TrustedCertificateSource)arguments.getSerializable(EXTRA_CERTIFICATE_SOURCE);
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}
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LoaderManager.getInstance(this).initLoader(0, null, this);
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}
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@Override
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public void onDestroy()
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{
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super.onDestroy();
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}
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@Override
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public void onAttach(Context context)
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{
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super.onAttach(context);
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if (context instanceof OnTrustedCertificateSelectedListener)
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{
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mListener = (OnTrustedCertificateSelectedListener)context;
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}
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}
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@Override
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public void onCreateOptionsMenu(Menu menu, MenuInflater inflater)
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{
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MenuItem item = menu.add(R.string.search);
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item.setIcon(android.R.drawable.ic_menu_search);
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item.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
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SearchView sv = new SearchView(getActivity());
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sv.setOnQueryTextListener(this);
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item.setActionView(sv);
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}
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@Override
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public boolean onQueryTextSubmit(String query)
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{ /* already handled when the text changes */
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return true;
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}
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@Override
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public boolean onQueryTextChange(String newText)
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{
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String search = TextUtils.isEmpty(newText) ? null : newText;
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mAdapter.getFilter().filter(search);
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return true;
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}
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@Override
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public Loader<List<TrustedCertificateEntry>> onCreateLoader(int id, Bundle args)
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{ /* we don't need the id as we have only one loader */
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return new CertificateListLoader(getActivity(), mSource);
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}
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@Override
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public void onLoadFinished(Loader<List<TrustedCertificateEntry>> loader, List<TrustedCertificateEntry> data)
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{
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mAdapter.setData(data);
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if (isResumed())
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{
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setListShown(true);
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}
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else
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{
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setListShownNoAnimation(true);
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}
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}
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@Override
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public void onLoaderReset(Loader<List<TrustedCertificateEntry>> loader)
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{
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mAdapter.setData(null);
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}
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@Override
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public void onListItemClick(ListView l, View v, int position, long id)
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{
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if (mListener != null)
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{
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mListener.onTrustedCertificateSelected(mAdapter.getItem(position));
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}
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}
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public static class CertificateListLoader extends AsyncTaskLoader<List<TrustedCertificateEntry>>
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{
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private List<TrustedCertificateEntry> mData;
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private final TrustedCertificateSource mSource;
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private TrustedCertificateManagerObserver mObserver;
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public CertificateListLoader(Context context, TrustedCertificateSource source)
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{
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super(context);
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mSource = source;
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}
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@Override
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public List<TrustedCertificateEntry> loadInBackground()
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{
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TrustedCertificateManager certman = TrustedCertificateManager.getInstance().load();
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Hashtable<String, X509Certificate> certificates = certman.getCACertificates(mSource);
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List<TrustedCertificateEntry> selected;
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selected = new ArrayList<TrustedCertificateEntry>();
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for (Entry<String, X509Certificate> entry : certificates.entrySet())
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{
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selected.add(new TrustedCertificateEntry(entry.getKey(), entry.getValue()));
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}
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Collections.sort(selected);
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return selected;
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}
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@Override
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protected void onStartLoading()
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{
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if (mData != null)
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{ /* if we have data ready, deliver it directly */
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deliverResult(mData);
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}
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if (takeContentChanged() || mData == null)
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{
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forceLoad();
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}
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}
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@Override
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public void deliverResult(List<TrustedCertificateEntry> data)
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{
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if (isReset())
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{
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return;
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}
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mData = data;
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if (isStarted())
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{ /* if it is started we deliver the data directly,
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* otherwise this is handled in onStartLoading */
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if (mObserver == null)
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{
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mObserver = new TrustedCertificateManagerObserver();
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TrustedCertificateManager.getInstance().addObserver(mObserver);
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}
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super.deliverResult(data);
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}
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}
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@Override
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protected void onReset()
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{
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if (mObserver != null)
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{
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TrustedCertificateManager.getInstance().deleteObserver(mObserver);
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mObserver = null;
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}
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mData = null;
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super.onReset();
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}
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@Override
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protected void onAbandon()
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{
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if (mObserver != null)
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{
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TrustedCertificateManager.getInstance().deleteObserver(mObserver);
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mObserver = null;
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}
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}
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private class TrustedCertificateManagerObserver implements Observer
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{
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private ForceLoadContentObserver mContentObserver = new ForceLoadContentObserver();
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@Override
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public void update(Observable observable, Object data)
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{
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mContentObserver.onChange(false);
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}
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}
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}
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}
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