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      1 /*
      2  * Copyright (C) 2015 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.vpn2;
     18 
     19 import android.content.Context;
     20 import android.content.pm.PackageInfo;
     21 import android.content.pm.PackageManager;
     22 import android.graphics.drawable.Drawable;
     23 import android.os.UserHandle;
     24 import android.support.v7.preference.Preference;
     25 
     26 import com.android.internal.net.LegacyVpnInfo;
     27 import com.android.internal.net.VpnConfig;
     28 
     29 /**
     30  * {@link android.support.v7.preference.Preference} containing information about a VPN
     31  * application. Tracks the package name and connection state.
     32  */
     33 public class AppPreference extends ManageablePreference {
     34     public static final int STATE_CONNECTED = LegacyVpnInfo.STATE_CONNECTED;
     35     public static final int STATE_DISCONNECTED = STATE_NONE;
     36 
     37     private final String mPackageName;
     38     private final String mName;
     39 
     40     public AppPreference(Context context, int userId, String packageName) {
     41         super(context, null /* attrs */);
     42         super.setUserId(userId);
     43 
     44         mPackageName = packageName;
     45 
     46         // Fetch icon and VPN label
     47         String label = packageName;
     48         Drawable icon = null;
     49         try {
     50             // Make all calls to the package manager as the appropriate user.
     51             Context userContext = getUserContext();
     52             PackageManager pm = userContext.getPackageManager();
     53             // The nested catch block is for the case that the app doesn't exist, so we can fall
     54             // back to the default activity icon.
     55             try {
     56                 PackageInfo pkgInfo = pm.getPackageInfo(mPackageName, 0 /* flags */);
     57                 if (pkgInfo != null) {
     58                     icon = pkgInfo.applicationInfo.loadIcon(pm);
     59                     label = VpnConfig.getVpnLabel(userContext, mPackageName).toString();
     60                 }
     61             } catch (PackageManager.NameNotFoundException pkgNotFound) {
     62                 // Use default app label and icon as fallback
     63             }
     64             if (icon == null) {
     65                 icon = pm.getDefaultActivityIcon();
     66             }
     67         } catch (PackageManager.NameNotFoundException userNotFound) {
     68             // No user, no useful information to obtain. Quietly fail.
     69         }
     70         mName = label;
     71 
     72         setTitle(mName);
     73         setIcon(icon);
     74     }
     75 
     76     public PackageInfo getPackageInfo() {
     77         try {
     78             PackageManager pm = getUserContext().getPackageManager();
     79             return pm.getPackageInfo(mPackageName, 0 /* flags */);
     80         } catch (PackageManager.NameNotFoundException nnfe) {
     81             return null;
     82         }
     83     }
     84 
     85     public String getLabel() {
     86         return mName;
     87     }
     88 
     89     public String getPackageName() {
     90         return mPackageName;
     91     }
     92 
     93     private Context getUserContext() throws PackageManager.NameNotFoundException {
     94         UserHandle user = UserHandle.of(mUserId);
     95         return getContext().createPackageContextAsUser(
     96                 getContext().getPackageName(), 0 /* flags */, user);
     97     }
     98 
     99     public int compareTo(Preference preference) {
    100         if (preference instanceof AppPreference) {
    101             AppPreference another = (AppPreference) preference;
    102             int result;
    103             if ((result = another.mState - mState) == 0 &&
    104                     (result = mName.compareToIgnoreCase(another.mName)) == 0 &&
    105                     (result = mPackageName.compareTo(another.mPackageName)) == 0) {
    106                 result = mUserId - another.mUserId;
    107             }
    108             return result;
    109         } else if (preference instanceof LegacyVpnPreference) {
    110             // Use comparator from ConfigPreference
    111             LegacyVpnPreference another = (LegacyVpnPreference) preference;
    112             return -another.compareTo(this);
    113         } else {
    114             return super.compareTo(preference);
    115         }
    116     }
    117 }
    118 
    119