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