Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 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.display; |
| 18 | |
| 19 | import com.android.internal.util.FastXmlSerializer; |
| 20 | import com.android.internal.util.XmlUtils; |
| 21 | |
| 22 | import org.xmlpull.v1.XmlPullParser; |
| 23 | import org.xmlpull.v1.XmlPullParserException; |
| 24 | import org.xmlpull.v1.XmlSerializer; |
| 25 | |
| 26 | import android.hardware.display.WifiDisplay; |
| 27 | import android.util.AtomicFile; |
| 28 | import android.util.Slog; |
| 29 | import android.util.Xml; |
Michael Wright | 1c9977b | 2016-07-12 13:30:10 -0700 | [diff] [blame] | 30 | import android.view.Display; |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 31 | |
| 32 | import java.io.BufferedInputStream; |
| 33 | import java.io.BufferedOutputStream; |
| 34 | import java.io.File; |
| 35 | import java.io.FileNotFoundException; |
| 36 | import java.io.FileOutputStream; |
| 37 | import java.io.IOException; |
| 38 | import java.io.InputStream; |
Michael Wright | 1c9977b | 2016-07-12 13:30:10 -0700 | [diff] [blame] | 39 | import java.io.PrintWriter; |
Wojciech Staszkiewicz | 9e9e2e7 | 2015-05-08 14:58:46 +0100 | [diff] [blame] | 40 | import java.nio.charset.StandardCharsets; |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 41 | import java.util.ArrayList; |
Michael Wright | 1c9977b | 2016-07-12 13:30:10 -0700 | [diff] [blame] | 42 | import java.util.HashMap; |
| 43 | import java.util.Map; |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 44 | |
| 45 | import libcore.io.IoUtils; |
| 46 | import libcore.util.Objects; |
| 47 | |
| 48 | /** |
| 49 | * Manages persistent state recorded by the display manager service as an XML file. |
| 50 | * Caller must acquire lock on the data store before accessing it. |
| 51 | * |
| 52 | * File format: |
| 53 | * <code> |
| 54 | * <display-manager-state> |
| 55 | * <remembered-wifi-displays> |
| 56 | * <wifi-display deviceAddress="00:00:00:00:00:00" deviceName="XXXX" deviceAlias="YYYY" /> |
Michael Wright | 1c9977b | 2016-07-12 13:30:10 -0700 | [diff] [blame] | 57 | * <remembered-wifi-displays> |
| 58 | * <display-states> |
| 59 | * <display> |
| 60 | * <color-mode>0</color-mode> |
| 61 | * </display> |
| 62 | * </display-states> |
| 63 | * </display-manager-state> |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 64 | * </code> |
| 65 | * |
| 66 | * TODO: refactor this to extract common code shared with the input manager's data store |
| 67 | */ |
| 68 | final class PersistentDataStore { |
| 69 | static final String TAG = "DisplayManager"; |
| 70 | |
| 71 | // Remembered Wifi display devices. |
| 72 | private ArrayList<WifiDisplay> mRememberedWifiDisplays = new ArrayList<WifiDisplay>(); |
| 73 | |
Michael Wright | 1c9977b | 2016-07-12 13:30:10 -0700 | [diff] [blame] | 74 | // Display state by unique id. |
| 75 | private final HashMap<String, DisplayState> mDisplayStates = |
| 76 | new HashMap<String, DisplayState>(); |
| 77 | |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 78 | // The atomic file used to safely read or write the file. |
| 79 | private final AtomicFile mAtomicFile; |
| 80 | |
| 81 | // True if the data has been loaded. |
| 82 | private boolean mLoaded; |
| 83 | |
| 84 | // True if there are changes to be saved. |
| 85 | private boolean mDirty; |
| 86 | |
| 87 | public PersistentDataStore() { |
| 88 | mAtomicFile = new AtomicFile(new File("/data/system/display-manager-state.xml")); |
| 89 | } |
| 90 | |
| 91 | public void saveIfNeeded() { |
| 92 | if (mDirty) { |
| 93 | save(); |
| 94 | mDirty = false; |
| 95 | } |
| 96 | } |
| 97 | |
Jeff Brown | 74da109 | 2012-11-07 16:02:13 -0800 | [diff] [blame] | 98 | public WifiDisplay getRememberedWifiDisplay(String deviceAddress) { |
| 99 | loadIfNeeded(); |
| 100 | int index = findRememberedWifiDisplay(deviceAddress); |
| 101 | if (index >= 0) { |
| 102 | return mRememberedWifiDisplays.get(index); |
| 103 | } |
| 104 | return null; |
| 105 | } |
| 106 | |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 107 | public WifiDisplay[] getRememberedWifiDisplays() { |
| 108 | loadIfNeeded(); |
| 109 | return mRememberedWifiDisplays.toArray(new WifiDisplay[mRememberedWifiDisplays.size()]); |
| 110 | } |
| 111 | |
| 112 | public WifiDisplay applyWifiDisplayAlias(WifiDisplay display) { |
| 113 | if (display != null) { |
| 114 | loadIfNeeded(); |
| 115 | |
Jeff Brown | c2b9ea6 | 2012-09-19 23:09:23 -0700 | [diff] [blame] | 116 | String alias = null; |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 117 | int index = findRememberedWifiDisplay(display.getDeviceAddress()); |
| 118 | if (index >= 0) { |
Jeff Brown | c2b9ea6 | 2012-09-19 23:09:23 -0700 | [diff] [blame] | 119 | alias = mRememberedWifiDisplays.get(index).getDeviceAlias(); |
| 120 | } |
| 121 | if (!Objects.equal(display.getDeviceAlias(), alias)) { |
Chong Zhang | 21f6039 | 2013-06-04 18:01:46 -0700 | [diff] [blame] | 122 | return new WifiDisplay(display.getDeviceAddress(), display.getDeviceName(), |
Chong Zhang | ab87a63 | 2013-06-11 10:25:49 -0700 | [diff] [blame] | 123 | alias, display.isAvailable(), display.canConnect(), display.isRemembered()); |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 124 | } |
| 125 | } |
| 126 | return display; |
| 127 | } |
| 128 | |
| 129 | public WifiDisplay[] applyWifiDisplayAliases(WifiDisplay[] displays) { |
| 130 | WifiDisplay[] results = displays; |
| 131 | if (results != null) { |
| 132 | int count = displays.length; |
| 133 | for (int i = 0; i < count; i++) { |
| 134 | WifiDisplay result = applyWifiDisplayAlias(displays[i]); |
| 135 | if (result != displays[i]) { |
| 136 | if (results == displays) { |
| 137 | results = new WifiDisplay[count]; |
| 138 | System.arraycopy(displays, 0, results, 0, count); |
| 139 | } |
| 140 | results[i] = result; |
| 141 | } |
| 142 | } |
| 143 | } |
| 144 | return results; |
| 145 | } |
| 146 | |
| 147 | public boolean rememberWifiDisplay(WifiDisplay display) { |
| 148 | loadIfNeeded(); |
| 149 | |
| 150 | int index = findRememberedWifiDisplay(display.getDeviceAddress()); |
| 151 | if (index >= 0) { |
| 152 | WifiDisplay other = mRememberedWifiDisplays.get(index); |
| 153 | if (other.equals(display)) { |
| 154 | return false; // already remembered without change |
| 155 | } |
| 156 | mRememberedWifiDisplays.set(index, display); |
| 157 | } else { |
| 158 | mRememberedWifiDisplays.add(display); |
| 159 | } |
| 160 | setDirty(); |
| 161 | return true; |
| 162 | } |
| 163 | |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 164 | public boolean forgetWifiDisplay(String deviceAddress) { |
| 165 | int index = findRememberedWifiDisplay(deviceAddress); |
| 166 | if (index >= 0) { |
| 167 | mRememberedWifiDisplays.remove(index); |
| 168 | setDirty(); |
| 169 | return true; |
| 170 | } |
| 171 | return false; |
| 172 | } |
| 173 | |
| 174 | private int findRememberedWifiDisplay(String deviceAddress) { |
| 175 | int count = mRememberedWifiDisplays.size(); |
| 176 | for (int i = 0; i < count; i++) { |
| 177 | if (mRememberedWifiDisplays.get(i).getDeviceAddress().equals(deviceAddress)) { |
| 178 | return i; |
| 179 | } |
| 180 | } |
| 181 | return -1; |
| 182 | } |
| 183 | |
Michael Wright | 1c9977b | 2016-07-12 13:30:10 -0700 | [diff] [blame] | 184 | public int getColorMode(DisplayDevice device) { |
| 185 | if (!device.hasStableUniqueId()) { |
Damien Bargiacchi | 4364bbf | 2016-11-01 21:44:20 -0700 | [diff] [blame] | 186 | return Display.COLOR_MODE_INVALID; |
Michael Wright | 1c9977b | 2016-07-12 13:30:10 -0700 | [diff] [blame] | 187 | } |
| 188 | DisplayState state = getDisplayState(device.getUniqueId(), false); |
| 189 | if (state == null) { |
Damien Bargiacchi | 4364bbf | 2016-11-01 21:44:20 -0700 | [diff] [blame] | 190 | return Display.COLOR_MODE_INVALID; |
Michael Wright | 1c9977b | 2016-07-12 13:30:10 -0700 | [diff] [blame] | 191 | } |
| 192 | return state.getColorMode(); |
| 193 | } |
| 194 | |
| 195 | public boolean setColorMode(DisplayDevice device, int colorMode) { |
| 196 | if (!device.hasStableUniqueId()) { |
| 197 | return false; |
| 198 | } |
| 199 | DisplayState state = getDisplayState(device.getUniqueId(), true); |
| 200 | if (state.setColorMode(colorMode)) { |
| 201 | setDirty(); |
| 202 | return true; |
| 203 | } |
| 204 | return false; |
| 205 | } |
| 206 | |
| 207 | private DisplayState getDisplayState(String uniqueId, boolean createIfAbsent) { |
| 208 | loadIfNeeded(); |
| 209 | DisplayState state = mDisplayStates.get(uniqueId); |
| 210 | if (state == null && createIfAbsent) { |
| 211 | state = new DisplayState(); |
| 212 | mDisplayStates.put(uniqueId, state); |
| 213 | setDirty(); |
| 214 | } |
| 215 | return state; |
| 216 | } |
| 217 | |
| 218 | public void loadIfNeeded() { |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 219 | if (!mLoaded) { |
| 220 | load(); |
| 221 | mLoaded = true; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | private void setDirty() { |
| 226 | mDirty = true; |
| 227 | } |
| 228 | |
| 229 | private void clearState() { |
| 230 | mRememberedWifiDisplays.clear(); |
| 231 | } |
| 232 | |
| 233 | private void load() { |
| 234 | clearState(); |
| 235 | |
| 236 | final InputStream is; |
| 237 | try { |
| 238 | is = mAtomicFile.openRead(); |
| 239 | } catch (FileNotFoundException ex) { |
| 240 | return; |
| 241 | } |
| 242 | |
| 243 | XmlPullParser parser; |
| 244 | try { |
| 245 | parser = Xml.newPullParser(); |
Wojciech Staszkiewicz | 9e9e2e7 | 2015-05-08 14:58:46 +0100 | [diff] [blame] | 246 | parser.setInput(new BufferedInputStream(is), StandardCharsets.UTF_8.name()); |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 247 | loadFromXml(parser); |
| 248 | } catch (IOException ex) { |
| 249 | Slog.w(TAG, "Failed to load display manager persistent store data.", ex); |
| 250 | clearState(); |
| 251 | } catch (XmlPullParserException ex) { |
| 252 | Slog.w(TAG, "Failed to load display manager persistent store data.", ex); |
| 253 | clearState(); |
| 254 | } finally { |
| 255 | IoUtils.closeQuietly(is); |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | private void save() { |
| 260 | final FileOutputStream os; |
| 261 | try { |
| 262 | os = mAtomicFile.startWrite(); |
| 263 | boolean success = false; |
| 264 | try { |
| 265 | XmlSerializer serializer = new FastXmlSerializer(); |
Wojciech Staszkiewicz | 9e9e2e7 | 2015-05-08 14:58:46 +0100 | [diff] [blame] | 266 | serializer.setOutput(new BufferedOutputStream(os), StandardCharsets.UTF_8.name()); |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 267 | saveToXml(serializer); |
| 268 | serializer.flush(); |
| 269 | success = true; |
| 270 | } finally { |
| 271 | if (success) { |
| 272 | mAtomicFile.finishWrite(os); |
| 273 | } else { |
| 274 | mAtomicFile.failWrite(os); |
| 275 | } |
| 276 | } |
| 277 | } catch (IOException ex) { |
| 278 | Slog.w(TAG, "Failed to save display manager persistent store data.", ex); |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | private void loadFromXml(XmlPullParser parser) |
| 283 | throws IOException, XmlPullParserException { |
| 284 | XmlUtils.beginDocument(parser, "display-manager-state"); |
| 285 | final int outerDepth = parser.getDepth(); |
| 286 | while (XmlUtils.nextElementWithin(parser, outerDepth)) { |
| 287 | if (parser.getName().equals("remembered-wifi-displays")) { |
| 288 | loadRememberedWifiDisplaysFromXml(parser); |
| 289 | } |
Michael Wright | 1c9977b | 2016-07-12 13:30:10 -0700 | [diff] [blame] | 290 | if (parser.getName().equals("display-states")) { |
| 291 | loadDisplaysFromXml(parser); |
| 292 | } |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 293 | } |
| 294 | } |
| 295 | |
| 296 | private void loadRememberedWifiDisplaysFromXml(XmlPullParser parser) |
| 297 | throws IOException, XmlPullParserException { |
| 298 | final int outerDepth = parser.getDepth(); |
| 299 | while (XmlUtils.nextElementWithin(parser, outerDepth)) { |
| 300 | if (parser.getName().equals("wifi-display")) { |
| 301 | String deviceAddress = parser.getAttributeValue(null, "deviceAddress"); |
| 302 | String deviceName = parser.getAttributeValue(null, "deviceName"); |
| 303 | String deviceAlias = parser.getAttributeValue(null, "deviceAlias"); |
| 304 | if (deviceAddress == null || deviceName == null) { |
| 305 | throw new XmlPullParserException( |
| 306 | "Missing deviceAddress or deviceName attribute on wifi-display."); |
| 307 | } |
| 308 | if (findRememberedWifiDisplay(deviceAddress) >= 0) { |
| 309 | throw new XmlPullParserException( |
| 310 | "Found duplicate wifi display device address."); |
| 311 | } |
| 312 | |
| 313 | mRememberedWifiDisplays.add( |
Chong Zhang | ab87a63 | 2013-06-11 10:25:49 -0700 | [diff] [blame] | 314 | new WifiDisplay(deviceAddress, deviceName, deviceAlias, |
| 315 | false, false, false)); |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 316 | } |
| 317 | } |
| 318 | } |
| 319 | |
Michael Wright | 1c9977b | 2016-07-12 13:30:10 -0700 | [diff] [blame] | 320 | private void loadDisplaysFromXml(XmlPullParser parser) |
| 321 | throws IOException, XmlPullParserException { |
| 322 | final int outerDepth = parser.getDepth(); |
| 323 | while (XmlUtils.nextElementWithin(parser, outerDepth)) { |
| 324 | if (parser.getName().equals("display")) { |
| 325 | String uniqueId = parser.getAttributeValue(null, "unique-id"); |
| 326 | if (uniqueId == null) { |
| 327 | throw new XmlPullParserException( |
| 328 | "Missing unique-id attribute on display."); |
| 329 | } |
| 330 | if (mDisplayStates.containsKey(uniqueId)) { |
| 331 | throw new XmlPullParserException("Found duplicate display."); |
| 332 | } |
| 333 | |
| 334 | DisplayState state = new DisplayState(); |
| 335 | state.loadFromXml(parser); |
| 336 | mDisplayStates.put(uniqueId, state); |
| 337 | } |
| 338 | } |
| 339 | } |
| 340 | |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 341 | private void saveToXml(XmlSerializer serializer) throws IOException { |
| 342 | serializer.startDocument(null, true); |
| 343 | serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); |
| 344 | serializer.startTag(null, "display-manager-state"); |
| 345 | serializer.startTag(null, "remembered-wifi-displays"); |
| 346 | for (WifiDisplay display : mRememberedWifiDisplays) { |
| 347 | serializer.startTag(null, "wifi-display"); |
| 348 | serializer.attribute(null, "deviceAddress", display.getDeviceAddress()); |
| 349 | serializer.attribute(null, "deviceName", display.getDeviceName()); |
| 350 | if (display.getDeviceAlias() != null) { |
| 351 | serializer.attribute(null, "deviceAlias", display.getDeviceAlias()); |
| 352 | } |
| 353 | serializer.endTag(null, "wifi-display"); |
| 354 | } |
| 355 | serializer.endTag(null, "remembered-wifi-displays"); |
Michael Wright | 1c9977b | 2016-07-12 13:30:10 -0700 | [diff] [blame] | 356 | serializer.startTag(null, "display-states"); |
| 357 | for (Map.Entry<String, DisplayState> entry : mDisplayStates.entrySet()) { |
| 358 | final String uniqueId = entry.getKey(); |
| 359 | final DisplayState state = entry.getValue(); |
| 360 | serializer.startTag(null, "display"); |
| 361 | serializer.attribute(null, "unique-id", uniqueId); |
| 362 | state.saveToXml(serializer); |
| 363 | serializer.endTag(null, "display"); |
| 364 | } |
| 365 | serializer.endTag(null, "display-states"); |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame] | 366 | serializer.endTag(null, "display-manager-state"); |
| 367 | serializer.endDocument(); |
| 368 | } |
Michael Wright | 1c9977b | 2016-07-12 13:30:10 -0700 | [diff] [blame] | 369 | |
| 370 | public void dump(PrintWriter pw) { |
| 371 | pw.println("PersistentDataStore"); |
| 372 | pw.println(" mLoaded=" + mLoaded); |
| 373 | pw.println(" mDirty=" + mDirty); |
| 374 | pw.println(" RememberedWifiDisplays:"); |
| 375 | int i = 0; |
| 376 | for (WifiDisplay display : mRememberedWifiDisplays) { |
| 377 | pw.println(" " + i++ + ": " + display); |
| 378 | } |
| 379 | pw.println(" DisplayStates:"); |
| 380 | i = 0; |
| 381 | for (Map.Entry<String, DisplayState> entry : mDisplayStates.entrySet()) { |
| 382 | pw.println(" " + i++ + ": " + entry.getKey()); |
| 383 | entry.getValue().dump(pw, " "); |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | private static final class DisplayState { |
| 388 | private int mColorMode; |
| 389 | |
| 390 | public boolean setColorMode(int colorMode) { |
| 391 | if (colorMode == mColorMode) { |
| 392 | return false; |
| 393 | } |
| 394 | mColorMode = colorMode; |
| 395 | return true; |
| 396 | } |
| 397 | |
| 398 | public int getColorMode() { |
| 399 | return mColorMode; |
| 400 | } |
| 401 | |
| 402 | public void loadFromXml(XmlPullParser parser) |
| 403 | throws IOException, XmlPullParserException { |
| 404 | final int outerDepth = parser.getDepth(); |
| 405 | |
| 406 | while (XmlUtils.nextElementWithin(parser, outerDepth)) { |
| 407 | if (parser.getName().equals("color-mode")) { |
| 408 | String value = parser.nextText(); |
| 409 | mColorMode = Integer.parseInt(value); |
| 410 | } |
| 411 | } |
| 412 | } |
| 413 | |
| 414 | public void saveToXml(XmlSerializer serializer) throws IOException { |
| 415 | serializer.startTag(null, "color-mode"); |
| 416 | serializer.text(Integer.toString(mColorMode)); |
| 417 | serializer.endTag(null, "color-mode"); |
| 418 | } |
| 419 | |
| 420 | private void dump(final PrintWriter pw, final String prefix) { |
| 421 | pw.println(prefix + "ColorMode=" + mColorMode); |
| 422 | } |
| 423 | } |
Wojciech Staszkiewicz | 9e9e2e7 | 2015-05-08 14:58:46 +0100 | [diff] [blame] | 424 | } |