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
17package com.android.contacts.common.preference;
18
19import android.content.ContentResolver;
20import android.content.Context;
21import android.database.ContentObserver;
22import android.os.Handler;
23import android.provider.ContactsContract;
24import android.provider.Settings;
25import android.provider.Settings.SettingNotFoundException;
26
27import com.android.contacts.common.R;
28
29/**
30 * Manages user preferences for contacts.
31 */
32public 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