1 /*
2  * Copyright (C) 2011 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.settings;
18 
19 import android.app.settings.SettingsEnums;
20 import android.content.Intent;
21 import android.os.Bundle;
22 import android.os.RemoteException;
23 import android.security.IKeyChainService;
24 import android.view.View;
25 
26 import androidx.annotation.NonNull;
27 import androidx.annotation.Nullable;
28 import androidx.fragment.app.Fragment;
29 import androidx.viewpager2.adapter.FragmentStateAdapter;
30 import androidx.viewpager2.widget.ViewPager2;
31 
32 import com.android.settings.dashboard.DashboardFragment;
33 
34 import com.google.android.material.tabs.TabLayout;
35 import com.google.android.material.tabs.TabLayoutMediator;
36 import com.google.common.collect.ImmutableList;
37 
38 import java.util.List;
39 
40 /**
41  * Main fragment to display trusted credentials settings.
42  */
43 public class TrustedCredentialsSettings extends DashboardFragment {
44 
45     private static final String TAG = "TrustedCredentialsSettings";
46 
47     public static final String ARG_SHOW_NEW_FOR_USER = "ARG_SHOW_NEW_FOR_USER";
48 
49     static final ImmutableList<Tab> TABS = ImmutableList.of(Tab.SYSTEM, Tab.USER);
50 
51     private static final String USER_ACTION = "com.android.settings.TRUSTED_CREDENTIALS_USER";
52 
53     @Override
getMetricsCategory()54     public int getMetricsCategory() {
55         return SettingsEnums.TRUSTED_CREDENTIALS;
56     }
57 
58     @Override
onCreate(Bundle savedInstanceState)59     public void onCreate(Bundle savedInstanceState) {
60         super.onCreate(savedInstanceState);
61         getActivity().setTitle(R.string.trusted_credentials);
62     }
63 
64     @Override
getPreferenceScreenResId()65     protected int getPreferenceScreenResId() {
66         return R.xml.placeholder_preference_screen;
67     }
68 
69     @Override
getLogTag()70     protected String getLogTag() {
71         return TAG;
72     }
73 
74     @Override
onViewCreated(@onNull View view, @Nullable Bundle savedInstanceState)75     public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
76         View tabContainer = view.findViewById(R.id.tab_container);
77         tabContainer.setVisibility(View.VISIBLE);
78 
79         ViewPager2 viewPager = tabContainer.findViewById(R.id.view_pager);
80         viewPager.setAdapter(new FragmentAdapter(this));
81         viewPager.setUserInputEnabled(false);
82 
83         Intent intent = getActivity().getIntent();
84         if (intent != null && USER_ACTION.equals(intent.getAction())) {
85             viewPager.setCurrentItem(TABS.indexOf(Tab.USER), false);
86         }
87 
88         TabLayout tabLayout = tabContainer.findViewById(R.id.tabs);
89         new TabLayoutMediator(tabLayout, viewPager, false, false,
90                 (tab, position) -> tab.setText(TABS.get(position).mLabel)).attach();
91     }
92 
93     private static class FragmentAdapter extends FragmentStateAdapter {
FragmentAdapter(Fragment fragment)94         FragmentAdapter(Fragment fragment) {
95             super(fragment);
96         }
97 
98         @NonNull
99         @Override
createFragment(int position)100         public Fragment createFragment(int position) {
101             TrustedCredentialsFragment fragment = new TrustedCredentialsFragment();
102             Bundle args = new Bundle();
103             args.putInt(TrustedCredentialsFragment.ARG_POSITION, position);
104             fragment.setArguments(args);
105             return fragment;
106         }
107 
108         @Override
getItemCount()109         public int getItemCount() {
110             return TrustedCredentialsSettings.TABS.size();
111         }
112     }
113 
114     enum Tab {
115         SYSTEM(R.string.trusted_credentials_system_tab, true),
116         USER(R.string.trusted_credentials_user_tab, false);
117 
118         private final int mLabel;
119         final boolean mSwitch;
120 
Tab(int label, boolean withSwitch)121         Tab(int label, boolean withSwitch) {
122             mLabel = label;
123             mSwitch = withSwitch;
124         }
125 
getAliases(IKeyChainService service)126         List<String> getAliases(IKeyChainService service) throws RemoteException {
127             switch (this) {
128                 case SYSTEM: {
129                     return service.getSystemCaAliases().getList();
130                 }
131                 case USER:
132                     return service.getUserCaAliases().getList();
133             }
134             throw new AssertionError();
135         }
136 
deleted(IKeyChainService service, String alias)137         boolean deleted(IKeyChainService service, String alias) throws RemoteException {
138             switch (this) {
139                 case SYSTEM:
140                     return !service.containsCaAlias(alias);
141                 case USER:
142                     return false;
143             }
144             throw new AssertionError();
145         }
146     }
147 }
148