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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.permissioncontroller.role.ui.specialappaccess;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Process;
import android.os.UserHandle;
import android.util.ArrayMap;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.ViewModelProviders;
import androidx.preference.Preference;
import androidx.preference.PreferenceFragmentCompat;
import androidx.preference.PreferenceManager;
import androidx.preference.PreferenceScreen;
import com.android.permissioncontroller.role.model.Role;
import com.android.permissioncontroller.role.model.Roles;
import com.android.permissioncontroller.role.ui.RoleItem;
import com.android.permissioncontroller.role.ui.TwoTargetPreference;
import java.util.List;
/**
* Child fragment for the list of special app accesses. Must be added as a child fragment and its
* parent fragment must be a {@link PreferenceFragmentCompat} which implements {@link Parent}.
*
* @param <PF> type of the parent fragment
*/
public class SpecialAppAccessListChildFragment<PF extends PreferenceFragmentCompat
& SpecialAppAccessListChildFragment.Parent> extends Fragment
implements Preference.OnPreferenceClickListener {
private SpecialAppAccessListViewModel mViewModel;
/**
* Create a new instance of this fragment.
*
* @return a new instance of this fragment
*/
@NonNull
public static SpecialAppAccessListChildFragment newInstance() {
return new SpecialAppAccessListChildFragment();
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
mViewModel = ViewModelProviders.of(this).get(SpecialAppAccessListViewModel.class);
mViewModel.getLiveData().observe(this, roleItems -> onRoleListChanged());
}
private void onRoleListChanged() {
List<RoleItem> roleItems = mViewModel.getLiveData().getValue();
if (roleItems == null) {
return;
}
PF preferenceFragment = requirePreferenceFragment();
PreferenceManager preferenceManager = preferenceFragment.getPreferenceManager();
Context context = preferenceManager.getContext();
PreferenceScreen preferenceScreen = preferenceFragment.getPreferenceScreen();
ArrayMap<String, Preference> oldPreferences = new ArrayMap<>();
if (preferenceScreen == null) {
preferenceScreen = preferenceManager.createPreferenceScreen(context);
preferenceFragment.setPreferenceScreen(preferenceScreen);
} else {
for (int i = preferenceScreen.getPreferenceCount() - 1; i >= 0; --i) {
Preference preference = preferenceScreen.getPreference(i);
preferenceScreen.removePreference(preference);
preference.setOrder(Preference.DEFAULT_ORDER);
oldPreferences.put(preference.getKey(), preference);
}
}
int roleItemsSize = roleItems.size();
for (int i = 0; i < roleItemsSize; i++) {
RoleItem roleItem = roleItems.get(i);
Role role = roleItem.getRole();
TwoTargetPreference preference = (TwoTargetPreference) oldPreferences.get(
role.getName());
if (preference == null) {
preference = preferenceFragment.createPreference(context);
preference.setKey(role.getName());
preference.setIconSpaceReserved(true);
preference.setTitle(role.getShortLabelResource());
preference.setPersistent(false);
preference.setOnPreferenceClickListener(this);
}
role.preparePreferenceAsUser(preference, Process.myUserHandle(), context);
preferenceScreen.addPreference(preference);
}
preferenceFragment.onPreferenceScreenChanged();
}
@Override
public boolean onPreferenceClick(@NonNull Preference preference) {
String roleName = preference.getKey();
Context context = requireContext();
Role role = Roles.get(context).get(roleName);
UserHandle user = Process.myUserHandle();
Intent intent = role.getManageIntentAsUser(user, context);
if (intent == null) {
intent = SpecialAppAccessActivity.createIntent(roleName, context);
}
startActivity(intent);
return true;
}
@NonNull
private PF requirePreferenceFragment() {
//noinspection unchecked
return (PF) requireParentFragment();
}
/**
* Interface that the parent fragment must implement.
*/
public interface Parent {
/**
* Create a new preference for a special app access.
*
* @param context the {@code Context} to use when creating the preference.
*
* @return a new preference for a special app access
*/
@NonNull
TwoTargetPreference createPreference(@NonNull Context context);
/**
* Callback when changes have been made to the {@link PreferenceScreen} of the parent
* {@link PreferenceFragmentCompat}.
*/
void onPreferenceScreenChanged();
}
}
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