Irfan Sheriff | b8c0e00 | 2013-02-20 14:19:54 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 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.server.wifi; |
| 18 | |
| 19 | import android.content.ContentResolver; |
| 20 | import android.content.Context; |
| 21 | import android.provider.Settings; |
| 22 | |
| 23 | import java.io.FileDescriptor; |
| 24 | import java.io.PrintWriter; |
| 25 | |
| 26 | /* Tracks persisted settings for Wi-Fi and airplane mode interaction */ |
| 27 | final class WifiSettingsStore { |
| 28 | /* Values tracked in Settings.Global.WIFI_ON */ |
| 29 | private static final int WIFI_DISABLED = 0; |
| 30 | private static final int WIFI_ENABLED = 1; |
| 31 | /* Wifi enabled while in airplane mode */ |
| 32 | private static final int WIFI_ENABLED_AIRPLANE_OVERRIDE = 2; |
| 33 | /* Wifi disabled due to airplane mode on */ |
| 34 | private static final int WIFI_DISABLED_AIRPLANE_ON = 3; |
| 35 | |
| 36 | /* Persisted state that tracks the wifi & airplane interaction from settings */ |
| 37 | private int mPersistWifiState = WIFI_DISABLED; |
| 38 | /* Tracks current airplane mode state */ |
| 39 | private boolean mAirplaneModeOn = false; |
Irfan Sheriff | 11aefad | 2013-03-06 07:57:41 -0800 | [diff] [blame] | 40 | |
| 41 | /* Tracks the setting of scan being available even when wi-fi is turned off |
| 42 | */ |
| 43 | private boolean mScanAlwaysAvailable; |
| 44 | |
Irfan Sheriff | b8c0e00 | 2013-02-20 14:19:54 -0800 | [diff] [blame] | 45 | private final Context mContext; |
| 46 | |
| 47 | /* Tracks if we have checked the saved wi-fi state after boot */ |
| 48 | private boolean mCheckSavedStateAtBoot = false; |
| 49 | |
| 50 | WifiSettingsStore(Context context) { |
| 51 | mContext = context; |
| 52 | mAirplaneModeOn = getPersistedAirplaneModeOn(); |
| 53 | mPersistWifiState = getPersistedWifiState(); |
Vinit Deshpande | 2183398 | 2013-07-03 00:10:53 +0000 | [diff] [blame] | 54 | mScanAlwaysAvailable = getPersistedScanAlwaysAvailable(); |
Irfan Sheriff | b8c0e00 | 2013-02-20 14:19:54 -0800 | [diff] [blame] | 55 | } |
| 56 | |
Irfan Sheriff | 11aefad | 2013-03-06 07:57:41 -0800 | [diff] [blame] | 57 | synchronized boolean isWifiToggleEnabled() { |
Irfan Sheriff | b8c0e00 | 2013-02-20 14:19:54 -0800 | [diff] [blame] | 58 | if (!mCheckSavedStateAtBoot) { |
| 59 | mCheckSavedStateAtBoot = true; |
| 60 | if (testAndClearWifiSavedState()) return true; |
| 61 | } |
| 62 | |
| 63 | if (mAirplaneModeOn) { |
| 64 | return mPersistWifiState == WIFI_ENABLED_AIRPLANE_OVERRIDE; |
| 65 | } else { |
| 66 | return mPersistWifiState != WIFI_DISABLED; |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Returns true if airplane mode is currently on. |
| 72 | * @return {@code true} if airplane mode is on. |
| 73 | */ |
| 74 | synchronized boolean isAirplaneModeOn() { |
| 75 | return mAirplaneModeOn; |
| 76 | } |
| 77 | |
Irfan Sheriff | 11aefad | 2013-03-06 07:57:41 -0800 | [diff] [blame] | 78 | synchronized boolean isScanAlwaysAvailable() { |
| 79 | return mScanAlwaysAvailable; |
| 80 | } |
| 81 | |
Irfan Sheriff | 8a64b1a | 2013-02-20 15:12:41 -0800 | [diff] [blame] | 82 | synchronized boolean handleWifiToggled(boolean wifiEnabled) { |
| 83 | // Can Wi-Fi be toggled in airplane mode ? |
| 84 | if (mAirplaneModeOn && !isAirplaneToggleable()) { |
| 85 | return false; |
| 86 | } |
| 87 | |
Irfan Sheriff | b8c0e00 | 2013-02-20 14:19:54 -0800 | [diff] [blame] | 88 | if (wifiEnabled) { |
Irfan Sheriff | 8a64b1a | 2013-02-20 15:12:41 -0800 | [diff] [blame] | 89 | if (mAirplaneModeOn) { |
Irfan Sheriff | b8c0e00 | 2013-02-20 14:19:54 -0800 | [diff] [blame] | 90 | persistWifiState(WIFI_ENABLED_AIRPLANE_OVERRIDE); |
| 91 | } else { |
| 92 | persistWifiState(WIFI_ENABLED); |
| 93 | } |
| 94 | } else { |
| 95 | // When wifi state is disabled, we do not care |
| 96 | // if airplane mode is on or not. The scenario of |
| 97 | // wifi being disabled due to airplane mode being turned on |
| 98 | // is handled handleAirplaneModeToggled() |
| 99 | persistWifiState(WIFI_DISABLED); |
| 100 | } |
Irfan Sheriff | 8a64b1a | 2013-02-20 15:12:41 -0800 | [diff] [blame] | 101 | return true; |
Irfan Sheriff | b8c0e00 | 2013-02-20 14:19:54 -0800 | [diff] [blame] | 102 | } |
| 103 | |
Irfan Sheriff | 8a64b1a | 2013-02-20 15:12:41 -0800 | [diff] [blame] | 104 | synchronized boolean handleAirplaneModeToggled() { |
| 105 | // Is Wi-Fi sensitive to airplane mode changes ? |
| 106 | if (!isAirplaneSensitive()) { |
| 107 | return false; |
| 108 | } |
| 109 | |
Irfan Sheriff | b8c0e00 | 2013-02-20 14:19:54 -0800 | [diff] [blame] | 110 | mAirplaneModeOn = getPersistedAirplaneModeOn(); |
| 111 | if (mAirplaneModeOn) { |
| 112 | // Wifi disabled due to airplane on |
| 113 | if (mPersistWifiState == WIFI_ENABLED) { |
| 114 | persistWifiState(WIFI_DISABLED_AIRPLANE_ON); |
| 115 | } |
| 116 | } else { |
| 117 | /* On airplane mode disable, restore wifi state if necessary */ |
| 118 | if (testAndClearWifiSavedState() || |
| 119 | mPersistWifiState == WIFI_ENABLED_AIRPLANE_OVERRIDE) { |
| 120 | persistWifiState(WIFI_ENABLED); |
| 121 | } |
| 122 | } |
Irfan Sheriff | 8a64b1a | 2013-02-20 15:12:41 -0800 | [diff] [blame] | 123 | return true; |
Irfan Sheriff | b8c0e00 | 2013-02-20 14:19:54 -0800 | [diff] [blame] | 124 | } |
| 125 | |
Irfan Sheriff | 11aefad | 2013-03-06 07:57:41 -0800 | [diff] [blame] | 126 | synchronized void handleWifiScanAlwaysAvailableToggled() { |
Vinit Deshpande | 2183398 | 2013-07-03 00:10:53 +0000 | [diff] [blame] | 127 | mScanAlwaysAvailable = getPersistedScanAlwaysAvailable(); |
Irfan Sheriff | 11aefad | 2013-03-06 07:57:41 -0800 | [diff] [blame] | 128 | } |
| 129 | |
Irfan Sheriff | b8c0e00 | 2013-02-20 14:19:54 -0800 | [diff] [blame] | 130 | void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| 131 | pw.println("mPersistWifiState " + mPersistWifiState); |
| 132 | pw.println("mAirplaneModeOn " + mAirplaneModeOn); |
| 133 | } |
| 134 | |
| 135 | private void persistWifiState(int state) { |
| 136 | final ContentResolver cr = mContext.getContentResolver(); |
| 137 | mPersistWifiState = state; |
| 138 | Settings.Global.putInt(cr, Settings.Global.WIFI_ON, state); |
| 139 | } |
| 140 | |
| 141 | /* Does Wi-Fi need to be disabled when airplane mode is on ? */ |
| 142 | private boolean isAirplaneSensitive() { |
| 143 | String airplaneModeRadios = Settings.Global.getString(mContext.getContentResolver(), |
| 144 | Settings.Global.AIRPLANE_MODE_RADIOS); |
| 145 | return airplaneModeRadios == null |
| 146 | || airplaneModeRadios.contains(Settings.Global.RADIO_WIFI); |
| 147 | } |
| 148 | |
| 149 | /* Is Wi-Fi allowed to be re-enabled while airplane mode is on ? */ |
| 150 | private boolean isAirplaneToggleable() { |
| 151 | String toggleableRadios = Settings.Global.getString(mContext.getContentResolver(), |
| 152 | Settings.Global.AIRPLANE_MODE_TOGGLEABLE_RADIOS); |
| 153 | return toggleableRadios != null |
| 154 | && toggleableRadios.contains(Settings.Global.RADIO_WIFI); |
| 155 | } |
| 156 | |
| 157 | /* After a reboot, we restore wi-fi to be on if it was turned off temporarily for tethering. |
| 158 | * The settings app tracks the saved state, but the framework has to check it at boot to |
| 159 | * make sure the wi-fi is turned on in case it was turned off for the purpose of tethering. |
| 160 | * |
| 161 | * Note that this is not part of the regular WIFI_ON setting because this only needs to |
| 162 | * be controlled through the settings app and not the Wi-Fi public API. |
| 163 | */ |
| 164 | private boolean testAndClearWifiSavedState() { |
| 165 | final ContentResolver cr = mContext.getContentResolver(); |
| 166 | int wifiSavedState = 0; |
| 167 | try { |
| 168 | wifiSavedState = Settings.Global.getInt(cr, Settings.Global.WIFI_SAVED_STATE); |
| 169 | if(wifiSavedState == 1) |
| 170 | Settings.Global.putInt(cr, Settings.Global.WIFI_SAVED_STATE, 0); |
| 171 | } catch (Settings.SettingNotFoundException e) { |
| 172 | ; |
| 173 | } |
| 174 | return (wifiSavedState == 1); |
| 175 | } |
| 176 | |
| 177 | private int getPersistedWifiState() { |
| 178 | final ContentResolver cr = mContext.getContentResolver(); |
| 179 | try { |
| 180 | return Settings.Global.getInt(cr, Settings.Global.WIFI_ON); |
| 181 | } catch (Settings.SettingNotFoundException e) { |
| 182 | Settings.Global.putInt(cr, Settings.Global.WIFI_ON, WIFI_DISABLED); |
| 183 | return WIFI_DISABLED; |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | private boolean getPersistedAirplaneModeOn() { |
Irfan Sheriff | 8a64b1a | 2013-02-20 15:12:41 -0800 | [diff] [blame] | 188 | return Settings.Global.getInt(mContext.getContentResolver(), |
Irfan Sheriff | b8c0e00 | 2013-02-20 14:19:54 -0800 | [diff] [blame] | 189 | Settings.Global.AIRPLANE_MODE_ON, 0) == 1; |
| 190 | } |
Irfan Sheriff | 11aefad | 2013-03-06 07:57:41 -0800 | [diff] [blame] | 191 | |
| 192 | private boolean getPersistedScanAlwaysAvailable() { |
| 193 | return Settings.Global.getInt(mContext.getContentResolver(), |
| 194 | Settings.Global.WIFI_SCAN_ALWAYS_AVAILABLE, |
| 195 | 0) == 1; |
| 196 | } |
Irfan Sheriff | b8c0e00 | 2013-02-20 14:19:54 -0800 | [diff] [blame] | 197 | } |