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.settings.wifi;
18
19import com.android.settings.R;
20import com.android.settings.WirelessSettings;
21
22import java.util.ArrayList;
23
24import android.app.AlertDialog;
25import android.content.BroadcastReceiver;
26import android.content.ContentResolver;
27import android.content.Context;
28import android.content.Intent;
29import android.content.IntentFilter;
30import android.net.ConnectivityManager;
31import android.net.NetworkInfo;
32import android.net.wifi.SupplicantState;
33import android.net.wifi.WifiConfiguration;
34import android.net.wifi.WifiInfo;
35import android.net.wifi.WifiManager;
36import android.preference.Preference;
37import android.preference.CheckBoxPreference;
38import android.provider.Settings;
39import android.text.TextUtils;
40import android.util.Log;
41import android.widget.Toast;
42
43public class WifiApEnabler implements Preference.OnPreferenceChangeListener {
44    private final Context mContext;
45    private final CheckBoxPreference mCheckBox;
46    private final CharSequence mOriginalSummary;
47
48    private WifiManager mWifiManager;
49    private final IntentFilter mIntentFilter;
50
51    ConnectivityManager mCm;
52    private String[] mWifiRegexs;
53
54    private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
55        @Override
56        public void onReceive(Context context, Intent intent) {
57            String action = intent.getAction();
58            if (WifiManager.WIFI_AP_STATE_CHANGED_ACTION.equals(action)) {
59                handleWifiApStateChanged(intent.getIntExtra(
60                        WifiManager.EXTRA_WIFI_AP_STATE, WifiManager.WIFI_AP_STATE_FAILED));
61            } else if (ConnectivityManager.ACTION_TETHER_STATE_CHANGED.equals(action)) {
62                ArrayList<String> available = intent.getStringArrayListExtra(
63                        ConnectivityManager.EXTRA_AVAILABLE_TETHER);
64                ArrayList<String> active = intent.getStringArrayListExtra(
65                        ConnectivityManager.EXTRA_ACTIVE_TETHER);
66                ArrayList<String> errored = intent.getStringArrayListExtra(
67                        ConnectivityManager.EXTRA_ERRORED_TETHER);
68                updateTetherState(available.toArray(), active.toArray(), errored.toArray());
69            }
70
71        }
72    };
73
74    public WifiApEnabler(Context context, CheckBoxPreference checkBox) {
75        mContext = context;
76        mCheckBox = checkBox;
77        mOriginalSummary = checkBox.getSummary();
78        checkBox.setPersistent(false);
79
80        mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
81        mCm = (ConnectivityManager)mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
82
83        mWifiRegexs = mCm.getTetherableWifiRegexs();
84
85        mIntentFilter = new IntentFilter(WifiManager.WIFI_AP_STATE_CHANGED_ACTION);
86        mIntentFilter.addAction(ConnectivityManager.ACTION_TETHER_STATE_CHANGED);
87    }
88
89    public void resume() {
90        mContext.registerReceiver(mReceiver, mIntentFilter);
91        enableWifiCheckBox();
92        mCheckBox.setOnPreferenceChangeListener(this);
93    }
94
95    public void pause() {
96        mContext.unregisterReceiver(mReceiver);
97        mCheckBox.setOnPreferenceChangeListener(null);
98    }
99
100    private void enableWifiCheckBox() {
101        boolean isAirplaneMode = Settings.System.getInt(mContext.getContentResolver(),
102                Settings.System.AIRPLANE_MODE_ON, 0) != 0;
103        if(!isAirplaneMode) {
104            mCheckBox.setEnabled(true);
105        } else {
106            mCheckBox.setEnabled(false);
107        }
108    }
109
110    public boolean onPreferenceChange(Preference preference, Object value) {
111
112        final ContentResolver cr = mContext.getContentResolver();
113        boolean enable = (Boolean)value;
114
115        /**
116         * Disable Wifi if enabling tethering
117         */
118        int wifiState = mWifiManager.getWifiState();
119        if (enable && ((wifiState == WifiManager.WIFI_STATE_ENABLING) ||
120                    (wifiState == WifiManager.WIFI_STATE_ENABLED))) {
121            mWifiManager.setWifiEnabled(false);
122            Settings.Secure.putInt(cr, Settings.Secure.WIFI_SAVED_STATE, 1);
123        }
124
125        if (mWifiManager.setWifiApEnabled(null, enable)) {
126            /* Disable here, enabled on receiving success broadcast */
127            mCheckBox.setEnabled(false);
128        } else {
129            mCheckBox.setSummary(R.string.wifi_error);
130        }
131
132        /**
133         *  If needed, restore Wifi on tether disable
134         */
135        if (!enable) {
136            int wifiSavedState = 0;
137            try {
138                wifiSavedState = Settings.Secure.getInt(cr, Settings.Secure.WIFI_SAVED_STATE);
139            } catch (Settings.SettingNotFoundException e) {
140                ;
141            }
142            if (wifiSavedState == 1) {
143                mWifiManager.setWifiEnabled(true);
144                Settings.Secure.putInt(cr, Settings.Secure.WIFI_SAVED_STATE, 0);
145            }
146        }
147
148        return false;
149    }
150
151    void updateConfigSummary(WifiConfiguration wifiConfig) {
152        String s = mContext.getString(
153                com.android.internal.R.string.wifi_tether_configure_ssid_default);
154        mCheckBox.setSummary(String.format(
155                    mContext.getString(R.string.wifi_tether_enabled_subtext),
156                    (wifiConfig == null) ? s : wifiConfig.SSID));
157    }
158
159    private void updateTetherState(Object[] available, Object[] tethered, Object[] errored) {
160        boolean wifiTethered = false;
161        boolean wifiErrored = false;
162
163        for (Object o : tethered) {
164            String s = (String)o;
165            for (String regex : mWifiRegexs) {
166                if (s.matches(regex)) wifiTethered = true;
167            }
168        }
169        for (Object o: errored) {
170            String s = (String)o;
171            for (String regex : mWifiRegexs) {
172                if (s.matches(regex)) wifiErrored = true;
173            }
174        }
175
176        if (wifiTethered) {
177            WifiConfiguration wifiConfig = mWifiManager.getWifiApConfiguration();
178            updateConfigSummary(wifiConfig);
179        } else if (wifiErrored) {
180            mCheckBox.setSummary(R.string.wifi_error);
181        }
182    }
183
184    private void handleWifiApStateChanged(int state) {
185        switch (state) {
186            case WifiManager.WIFI_AP_STATE_ENABLING:
187                mCheckBox.setSummary(R.string.wifi_starting);
188                mCheckBox.setEnabled(false);
189                break;
190            case WifiManager.WIFI_AP_STATE_ENABLED:
191                /**
192                 * Summary on enable is handled by tether
193                 * broadcast notice
194                 */
195                mCheckBox.setChecked(true);
196                /* Doesnt need the airplane check */
197                mCheckBox.setEnabled(true);
198                break;
199            case WifiManager.WIFI_AP_STATE_DISABLING:
200                mCheckBox.setSummary(R.string.wifi_stopping);
201                mCheckBox.setEnabled(false);
202                break;
203            case WifiManager.WIFI_AP_STATE_DISABLED:
204                mCheckBox.setChecked(false);
205                mCheckBox.setSummary(mOriginalSummary);
206                enableWifiCheckBox();
207                break;
208            default:
209                mCheckBox.setChecked(false);
210                mCheckBox.setSummary(R.string.wifi_error);
211                enableWifiCheckBox();
212        }
213    }
214}
215