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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 
     17 package com.android.contacts.preference;
     18 
     19 import com.android.contacts.R;
     20 
     21 import android.content.ContentResolver;
     22 import android.content.Context;
     23 import android.database.ContentObserver;
     24 import android.os.Handler;
     25 import android.provider.ContactsContract;
     26 import android.provider.Settings;
     27 import android.provider.Settings.SettingNotFoundException;
     28 
     29 /**
     30  * Manages user preferences for contacts.
     31  */
     32 public final class ContactsPreferences extends ContentObserver {
     33 
     34     public static final String PREF_DISPLAY_ONLY_PHONES = "only_phones";
     35     public static final boolean PREF_DISPLAY_ONLY_PHONES_DEFAULT = false;
     36 
     37     private Context mContext;
     38     private int mSortOrder = -1;
     39     private int mDisplayOrder = -1;
     40     private ChangeListener mListener = null;
     41     private Handler mHandler;
     42 
     43     public ContactsPreferences(Context context) {
     44         super(null);
     45         mContext = context;
     46         mHandler = new Handler();
     47     }
     48 
     49     public boolean isSortOrderUserChangeable() {
     50         return mContext.getResources().getBoolean(R.bool.config_sort_order_user_changeable);
     51     }
     52 
     53     public int getDefaultSortOrder() {
     54         if (mContext.getResources().getBoolean(R.bool.config_default_sort_order_primary)) {
     55             return ContactsContract.Preferences.SORT_ORDER_PRIMARY;
     56         } else {
     57             return ContactsContract.Preferences.SORT_ORDER_ALTERNATIVE;
     58         }
     59     }
     60 
     61     public int getSortOrder() {
     62         if (!isSortOrderUserChangeable()) {
     63             return getDefaultSortOrder();
     64         }
     65 
     66         if (mSortOrder == -1) {
     67             try {
     68                 mSortOrder = Settings.System.getInt(mContext.getContentResolver(),
     69                         ContactsContract.Preferences.SORT_ORDER);
     70             } catch (SettingNotFoundException e) {
     71                 mSortOrder = getDefaultSortOrder();
     72             }
     73         }
     74         return mSortOrder;
     75     }
     76 
     77     public void setSortOrder(int sortOrder) {
     78         mSortOrder = sortOrder;
     79         Settings.System.putInt(mContext.getContentResolver(),
     80                 ContactsContract.Preferences.SORT_ORDER, sortOrder);
     81     }
     82 
     83     public boolean isDisplayOrderUserChangeable() {
     84         return mContext.getResources().getBoolean(R.bool.config_display_order_user_changeable);
     85     }
     86 
     87     public int getDefaultDisplayOrder() {
     88         if (mContext.getResources().getBoolean(R.bool.config_default_display_order_primary)) {
     89             return ContactsContract.Preferences.DISPLAY_ORDER_PRIMARY;
     90         } else {
     91             return ContactsContract.Preferences.DISPLAY_ORDER_ALTERNATIVE;
     92         }
     93     }
     94 
     95     public int getDisplayOrder() {
     96         if (!isDisplayOrderUserChangeable()) {
     97             return getDefaultDisplayOrder();
     98         }
     99 
    100         if (mDisplayOrder == -1) {
    101             try {
    102                 mDisplayOrder = Settings.System.getInt(mContext.getContentResolver(),
    103                         ContactsContract.Preferences.DISPLAY_ORDER);
    104             } catch (SettingNotFoundException e) {
    105                 mDisplayOrder = getDefaultDisplayOrder();
    106             }
    107         }
    108         return mDisplayOrder;
    109     }
    110 
    111     public void setDisplayOrder(int displayOrder) {
    112         mDisplayOrder = displayOrder;
    113         Settings.System.putInt(mContext.getContentResolver(),
    114                 ContactsContract.Preferences.DISPLAY_ORDER, displayOrder);
    115     }
    116 
    117     public void registerChangeListener(ChangeListener listener) {
    118         if (mListener != null) unregisterChangeListener();
    119 
    120         mListener = listener;
    121 
    122         // Reset preferences to "unknown" because they may have changed while the
    123         // observer was unregistered.
    124         mDisplayOrder = -1;
    125         mSortOrder = -1;
    126 
    127         final ContentResolver contentResolver = mContext.getContentResolver();
    128         contentResolver.registerContentObserver(
    129                 Settings.System.getUriFor(
    130                         ContactsContract.Preferences.SORT_ORDER), false, this);
    131         contentResolver.registerContentObserver(
    132                 Settings.System.getUriFor(
    133                         ContactsContract.Preferences.DISPLAY_ORDER), false, this);
    134     }
    135 
    136     public void unregisterChangeListener() {
    137         if (mListener != null) {
    138             mContext.getContentResolver().unregisterContentObserver(this);
    139             mListener = null;
    140         }
    141     }
    142 
    143     @Override
    144     public void onChange(boolean selfChange) {
    145         // This notification is not sent on the Ui thread. Use the previously created Handler
    146         // to switch to the Ui thread
    147         mHandler.post(new Runnable() {
    148             @Override
    149             public void run() {
    150                 mSortOrder = -1;
    151                 mDisplayOrder = -1;
    152                 if (mListener != null) mListener.onChange();
    153             }
    154         });
    155     }
    156 
    157     public interface ChangeListener {
    158         void onChange();
    159     }
    160 }
    161