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