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      1 /*
      2  * Copyright (C) 2010 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 package com.android.contacts.list;
     17 
     18 import android.content.AsyncTaskLoader;
     19 import android.content.Context;
     20 import android.content.pm.PackageManager;
     21 import android.database.ContentObserver;
     22 import android.database.Cursor;
     23 import android.database.MatrixCursor;
     24 import android.net.Uri;
     25 import android.os.Handler;
     26 import android.provider.ContactsContract.Directory;
     27 import android.text.TextUtils;
     28 import android.util.Log;
     29 
     30 import com.android.contacts.R;
     31 import com.android.contacts.compat.DirectoryCompat;
     32 
     33 /**
     34  * A specialized loader for the list of directories, see {@link Directory}.
     35  */
     36 public class DirectoryListLoader extends AsyncTaskLoader<Cursor> {
     37 
     38     private static final String TAG = "ContactEntryListAdapter";
     39 
     40     public static final int SEARCH_MODE_NONE = 0;
     41     public static final int SEARCH_MODE_DEFAULT = 1;
     42     public static final int SEARCH_MODE_CONTACT_SHORTCUT = 2;
     43     public static final int SEARCH_MODE_DATA_SHORTCUT = 3;
     44 
     45     private static final class DirectoryQuery {
     46         public static final String ORDER_BY = Directory._ID;
     47 
     48         public static final String[] PROJECTION = {
     49             Directory._ID,
     50             Directory.PACKAGE_NAME,
     51             Directory.TYPE_RESOURCE_ID,
     52             Directory.DISPLAY_NAME,
     53             Directory.PHOTO_SUPPORT,
     54         };
     55 
     56         public static final int ID = 0;
     57         public static final int PACKAGE_NAME = 1;
     58         public static final int TYPE_RESOURCE_ID = 2;
     59         public static final int DISPLAY_NAME = 3;
     60         public static final int PHOTO_SUPPORT = 4;
     61 
     62         public static Uri getDirectoryUri(int mode) {
     63             if (mode == SEARCH_MODE_DATA_SHORTCUT || mode == SEARCH_MODE_CONTACT_SHORTCUT) {
     64                 return Directory.CONTENT_URI;
     65             } else {
     66                 return DirectoryCompat.getContentUri();
     67             }
     68         }
     69     }
     70 
     71     // This is a virtual column created for a MatrixCursor.
     72     public static final String DIRECTORY_TYPE = "directoryType";
     73 
     74     private static final String[] RESULT_PROJECTION = {
     75         Directory._ID,
     76         DIRECTORY_TYPE,
     77         Directory.DISPLAY_NAME,
     78         Directory.PHOTO_SUPPORT,
     79     };
     80 
     81     private final ContentObserver mObserver = new ContentObserver(new Handler()) {
     82         @Override
     83         public void onChange(boolean selfChange) {
     84             forceLoad();
     85         }
     86     };
     87 
     88     private int mDirectorySearchMode;
     89     private boolean mLocalInvisibleDirectoryEnabled;
     90 
     91     private MatrixCursor mDefaultDirectoryList;
     92 
     93     public DirectoryListLoader(Context context) {
     94         super(context);
     95     }
     96 
     97     public void setDirectorySearchMode(int mode) {
     98         mDirectorySearchMode = mode;
     99     }
    100 
    101     /**
    102      * A flag that indicates whether the {@link Directory#LOCAL_INVISIBLE} directory should
    103      * be included in the results.
    104      */
    105     public void setLocalInvisibleDirectoryEnabled(boolean flag) {
    106         this.mLocalInvisibleDirectoryEnabled = flag;
    107     }
    108 
    109     @Override
    110     protected void onStartLoading() {
    111         getContext().getContentResolver().
    112                 registerContentObserver(DirectoryQuery.getDirectoryUri(mDirectorySearchMode),
    113                         false, mObserver);
    114         forceLoad();
    115     }
    116 
    117     @Override
    118     protected void onStopLoading() {
    119         getContext().getContentResolver().unregisterContentObserver(mObserver);
    120     }
    121 
    122     @Override
    123     public Cursor loadInBackground() {
    124         if (mDirectorySearchMode == SEARCH_MODE_NONE) {
    125             return getDefaultDirectories();
    126         }
    127 
    128         MatrixCursor result = new MatrixCursor(RESULT_PROJECTION);
    129         Context context = getContext();
    130         PackageManager pm = context.getPackageManager();
    131         String selection;
    132         switch (mDirectorySearchMode) {
    133             case SEARCH_MODE_DEFAULT:
    134                 selection = null;
    135                 break;
    136 
    137             case SEARCH_MODE_CONTACT_SHORTCUT:
    138                 selection = Directory.SHORTCUT_SUPPORT + "=" + Directory.SHORTCUT_SUPPORT_FULL;
    139                 break;
    140 
    141             case SEARCH_MODE_DATA_SHORTCUT:
    142                 selection = Directory.SHORTCUT_SUPPORT + " IN ("
    143                         + Directory.SHORTCUT_SUPPORT_FULL + ", "
    144                         + Directory.SHORTCUT_SUPPORT_DATA_ITEMS_ONLY + ")";
    145                 break;
    146 
    147             default:
    148                 throw new RuntimeException(
    149                         "Unsupported directory search mode: " + mDirectorySearchMode);
    150         }
    151         Cursor cursor = null;
    152         try {
    153             cursor = context.getContentResolver().query(
    154                     DirectoryQuery.getDirectoryUri(mDirectorySearchMode),
    155                     DirectoryQuery.PROJECTION, selection, null, DirectoryQuery.ORDER_BY);
    156 
    157             if (cursor == null) {
    158                 return result;
    159             }
    160 
    161             while(cursor.moveToNext()) {
    162                 long directoryId = cursor.getLong(DirectoryQuery.ID);
    163                 if (!mLocalInvisibleDirectoryEnabled
    164                         && DirectoryCompat.isInvisibleDirectory(directoryId)) {
    165                     continue;
    166                 }
    167                 String directoryType = null;
    168 
    169                 String packageName = cursor.getString(DirectoryQuery.PACKAGE_NAME);
    170                 int typeResourceId = cursor.getInt(DirectoryQuery.TYPE_RESOURCE_ID);
    171                 if (!TextUtils.isEmpty(packageName) && typeResourceId != 0) {
    172                     try {
    173                         directoryType = pm.getResourcesForApplication(packageName)
    174                                 .getString(typeResourceId);
    175                     } catch (Exception e) {
    176                         Log.e(TAG, "Cannot obtain directory type from package: " + packageName);
    177                     }
    178                 }
    179                 String displayName = cursor.getString(DirectoryQuery.DISPLAY_NAME);
    180                 int photoSupport = cursor.getInt(DirectoryQuery.PHOTO_SUPPORT);
    181                 result.addRow(new Object[]{directoryId, directoryType, displayName, photoSupport});
    182             }
    183         } catch (RuntimeException e) {
    184             Log.w(TAG, "Runtime Exception when querying directory");
    185         } finally {
    186             if (cursor != null) {
    187                 cursor.close();
    188             }
    189         }
    190 
    191         return result;
    192     }
    193 
    194     private Cursor getDefaultDirectories() {
    195         if (mDefaultDirectoryList == null) {
    196             mDefaultDirectoryList = new MatrixCursor(RESULT_PROJECTION);
    197             mDefaultDirectoryList.addRow(new Object[] {
    198                     Directory.DEFAULT,
    199                     getContext().getString(R.string.contactsList),
    200                     null,
    201                     null
    202             });
    203             mDefaultDirectoryList.addRow(new Object[] {
    204                     Directory.LOCAL_INVISIBLE,
    205                     getContext().getString(R.string.local_invisible_directory),
    206                     null,
    207                     null
    208             });
    209         }
    210         return mDefaultDirectoryList;
    211     }
    212 
    213     @Override
    214     protected void onReset() {
    215         stopLoading();
    216     }
    217 }
    218