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      1 /*
      2  * Copyright (C) 2014 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.systemui.statusbar.policy;
     18 
     19 import android.content.Context;
     20 import android.content.Intent;
     21 import android.content.pm.PackageManager;
     22 import android.content.pm.ResolveInfo;
     23 import android.os.UserHandle;
     24 import android.util.Log;
     25 import android.view.LayoutInflater;
     26 import android.view.View;
     27 
     28 import com.android.internal.widget.LockPatternUtils;
     29 import com.android.systemui.statusbar.phone.KeyguardPreviewContainer;
     30 
     31 import java.util.List;
     32 
     33 /**
     34  * Utility class to inflate previews for phone and camera affordance.
     35  */
     36 public class PreviewInflater {
     37 
     38     private static final String TAG = "PreviewInflater";
     39 
     40     private static final String META_DATA_KEYGUARD_LAYOUT = "com.android.keyguard.layout";
     41 
     42     private Context mContext;
     43     private LockPatternUtils mLockPatternUtils;
     44 
     45     public PreviewInflater(Context context, LockPatternUtils lockPatternUtils) {
     46         mContext = context;
     47         mLockPatternUtils = lockPatternUtils;
     48     }
     49 
     50     public View inflatePreview(Intent intent) {
     51         WidgetInfo info = getWidgetInfo(intent);
     52         if (info == null) {
     53             return null;
     54         }
     55         View v = inflateWidgetView(info);
     56         if (v == null) {
     57             return null;
     58         }
     59         KeyguardPreviewContainer container = new KeyguardPreviewContainer(mContext, null);
     60         container.addView(v);
     61         return container;
     62     }
     63 
     64     private View inflateWidgetView(WidgetInfo widgetInfo) {
     65         View widgetView = null;
     66         try {
     67             Context appContext = mContext.createPackageContext(
     68                     widgetInfo.contextPackage, Context.CONTEXT_RESTRICTED);
     69             LayoutInflater appInflater = (LayoutInflater)
     70                     appContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
     71             appInflater = appInflater.cloneInContext(appContext);
     72             widgetView = appInflater.inflate(widgetInfo.layoutId, null, false);
     73         } catch (PackageManager.NameNotFoundException|RuntimeException e) {
     74             Log.w(TAG, "Error creating widget view", e);
     75         }
     76         return widgetView;
     77     }
     78 
     79     private WidgetInfo getWidgetInfo(Intent intent) {
     80         WidgetInfo info = new WidgetInfo();
     81         PackageManager packageManager = mContext.getPackageManager();
     82         final List<ResolveInfo> appList = packageManager.queryIntentActivitiesAsUser(
     83                 intent, PackageManager.MATCH_DEFAULT_ONLY, mLockPatternUtils.getCurrentUser());
     84         if (appList.size() == 0) {
     85             return null;
     86         }
     87         ResolveInfo resolved = packageManager.resolveActivityAsUser(intent,
     88                 PackageManager.MATCH_DEFAULT_ONLY | PackageManager.GET_META_DATA,
     89                 mLockPatternUtils.getCurrentUser());
     90         if (wouldLaunchResolverActivity(resolved, appList)) {
     91             return null;
     92         }
     93         if (resolved == null || resolved.activityInfo == null) {
     94             return null;
     95         }
     96         if (resolved.activityInfo.metaData == null || resolved.activityInfo.metaData.isEmpty()) {
     97             return null;
     98         }
     99         int layoutId = resolved.activityInfo.metaData.getInt(META_DATA_KEYGUARD_LAYOUT);
    100         if (layoutId == 0) {
    101             return null;
    102         }
    103         info.contextPackage = resolved.activityInfo.packageName;
    104         info.layoutId = layoutId;
    105         return info;
    106     }
    107 
    108     public static boolean wouldLaunchResolverActivity(Context ctx, Intent intent,
    109             int currentUserId) {
    110         PackageManager packageManager = ctx.getPackageManager();
    111         final List<ResolveInfo> appList = packageManager.queryIntentActivitiesAsUser(
    112                 intent, PackageManager.MATCH_DEFAULT_ONLY, currentUserId);
    113         if (appList.size() == 0) {
    114             return false;
    115         }
    116         ResolveInfo resolved = packageManager.resolveActivityAsUser(intent,
    117                 PackageManager.MATCH_DEFAULT_ONLY | PackageManager.GET_META_DATA, currentUserId);
    118         return wouldLaunchResolverActivity(resolved, appList);
    119     }
    120 
    121     private static boolean wouldLaunchResolverActivity(
    122             ResolveInfo resolved, List<ResolveInfo> appList) {
    123         // If the list contains the above resolved activity, then it can't be
    124         // ResolverActivity itself.
    125         for (int i = 0; i < appList.size(); i++) {
    126             ResolveInfo tmp = appList.get(i);
    127             if (tmp.activityInfo.name.equals(resolved.activityInfo.name)
    128                     && tmp.activityInfo.packageName.equals(resolved.activityInfo.packageName)) {
    129                 return false;
    130             }
    131         }
    132         return true;
    133     }
    134 
    135     private static class WidgetInfo {
    136         String contextPackage;
    137         int layoutId;
    138     }
    139 }
    140