Jeff Brown | bd6e150 | 2012-08-28 03:27:37 -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 android.hardware.display; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.hardware.display.DisplayManager.DisplayListener; |
| 21 | import android.os.Handler; |
| 22 | import android.os.IBinder; |
| 23 | import android.os.Looper; |
| 24 | import android.os.Message; |
| 25 | import android.os.RemoteException; |
| 26 | import android.os.ServiceManager; |
| 27 | import android.util.Log; |
| 28 | import android.util.SparseArray; |
| 29 | import android.view.CompatibilityInfoHolder; |
| 30 | import android.view.Display; |
| 31 | import android.view.DisplayInfo; |
| 32 | |
| 33 | import java.util.ArrayList; |
| 34 | |
| 35 | /** |
| 36 | * Manager communication with the display manager service on behalf of |
| 37 | * an application process. You're probably looking for {@link DisplayManager}. |
| 38 | * |
| 39 | * @hide |
| 40 | */ |
| 41 | public final class DisplayManagerGlobal { |
| 42 | private static final String TAG = "DisplayManager"; |
| 43 | private static final boolean DEBUG = false; |
| 44 | |
Jeff Brown | 4ed8fe7 | 2012-08-30 18:18:29 -0700 | [diff] [blame] | 45 | // True if display info and display ids should be cached. |
| 46 | // |
| 47 | // FIXME: The cache is currently disabled because it's unclear whether we have the |
| 48 | // necessary guarantees that the caches will always be flushed before clients |
| 49 | // attempt to observe their new state. For example, depending on the order |
| 50 | // in which the binder transactions take place, we might have a problem where |
| 51 | // an application could start processing a configuration change due to a display |
| 52 | // orientation change before the display info cache has actually been invalidated. |
| 53 | private static final boolean USE_CACHE = false; |
| 54 | |
Jeff Brown | bd6e150 | 2012-08-28 03:27:37 -0700 | [diff] [blame] | 55 | public static final int EVENT_DISPLAY_ADDED = 1; |
| 56 | public static final int EVENT_DISPLAY_CHANGED = 2; |
| 57 | public static final int EVENT_DISPLAY_REMOVED = 3; |
| 58 | |
| 59 | private static DisplayManagerGlobal sInstance; |
| 60 | |
| 61 | private final Object mLock = new Object(); |
| 62 | |
| 63 | private final IDisplayManager mDm; |
| 64 | |
| 65 | private DisplayManagerCallback mCallback; |
| 66 | private final ArrayList<DisplayListenerDelegate> mDisplayListeners = |
| 67 | new ArrayList<DisplayListenerDelegate>(); |
| 68 | |
| 69 | private final SparseArray<DisplayInfo> mDisplayInfoCache = new SparseArray<DisplayInfo>(); |
| 70 | private int[] mDisplayIdCache; |
| 71 | |
| 72 | private DisplayManagerGlobal(IDisplayManager dm) { |
| 73 | mDm = dm; |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Gets an instance of the display manager global singleton. |
| 78 | * |
| 79 | * @return The display manager instance, may be null early in system startup |
| 80 | * before the display manager has been fully initialized. |
| 81 | */ |
| 82 | public static DisplayManagerGlobal getInstance() { |
| 83 | synchronized (DisplayManagerGlobal.class) { |
| 84 | if (sInstance == null) { |
| 85 | IBinder b = ServiceManager.getService(Context.DISPLAY_SERVICE); |
| 86 | if (b != null) { |
| 87 | sInstance = new DisplayManagerGlobal(IDisplayManager.Stub.asInterface(b)); |
| 88 | } |
| 89 | } |
| 90 | return sInstance; |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Get information about a particular logical display. |
| 96 | * |
| 97 | * @param displayId The logical display id. |
| 98 | * @return Information about the specified display, or null if it does not exist. |
| 99 | * This object belongs to an internal cache and should be treated as if it were immutable. |
| 100 | */ |
| 101 | public DisplayInfo getDisplayInfo(int displayId) { |
| 102 | try { |
| 103 | synchronized (mLock) { |
Jeff Brown | 4ed8fe7 | 2012-08-30 18:18:29 -0700 | [diff] [blame] | 104 | DisplayInfo info; |
| 105 | if (USE_CACHE) { |
| 106 | info = mDisplayInfoCache.get(displayId); |
| 107 | if (info != null) { |
| 108 | return info; |
| 109 | } |
Jeff Brown | bd6e150 | 2012-08-28 03:27:37 -0700 | [diff] [blame] | 110 | } |
| 111 | |
| 112 | info = mDm.getDisplayInfo(displayId); |
| 113 | if (info == null) { |
| 114 | return null; |
| 115 | } |
Jeff Brown | 4ed8fe7 | 2012-08-30 18:18:29 -0700 | [diff] [blame] | 116 | |
| 117 | if (USE_CACHE) { |
| 118 | mDisplayInfoCache.put(displayId, info); |
| 119 | } |
| 120 | registerCallbackIfNeededLocked(); |
| 121 | |
Jeff Brown | bd6e150 | 2012-08-28 03:27:37 -0700 | [diff] [blame] | 122 | if (DEBUG) { |
| 123 | Log.d(TAG, "getDisplayInfo: displayId=" + displayId + ", info=" + info); |
| 124 | } |
Jeff Brown | bd6e150 | 2012-08-28 03:27:37 -0700 | [diff] [blame] | 125 | return info; |
| 126 | } |
| 127 | } catch (RemoteException ex) { |
| 128 | Log.e(TAG, "Could not get display information from display manager.", ex); |
| 129 | return null; |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * Gets all currently valid logical display ids. |
| 135 | * |
| 136 | * @return An array containing all display ids. |
| 137 | */ |
| 138 | public int[] getDisplayIds() { |
| 139 | try { |
| 140 | synchronized (mLock) { |
Jeff Brown | 4ed8fe7 | 2012-08-30 18:18:29 -0700 | [diff] [blame] | 141 | if (USE_CACHE) { |
| 142 | if (mDisplayIdCache != null) { |
| 143 | return mDisplayIdCache; |
| 144 | } |
Jeff Brown | bd6e150 | 2012-08-28 03:27:37 -0700 | [diff] [blame] | 145 | } |
Jeff Brown | 4ed8fe7 | 2012-08-30 18:18:29 -0700 | [diff] [blame] | 146 | |
| 147 | int[] displayIds = mDm.getDisplayIds(); |
| 148 | if (USE_CACHE) { |
| 149 | mDisplayIdCache = displayIds; |
| 150 | } |
| 151 | registerCallbackIfNeededLocked(); |
| 152 | return displayIds; |
Jeff Brown | bd6e150 | 2012-08-28 03:27:37 -0700 | [diff] [blame] | 153 | } |
| 154 | } catch (RemoteException ex) { |
| 155 | Log.e(TAG, "Could not get display ids from display manager.", ex); |
| 156 | return new int[] { Display.DEFAULT_DISPLAY }; |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * Gets information about a logical display. |
| 162 | * |
| 163 | * The display metrics may be adjusted to provide compatibility |
| 164 | * for legacy applications. |
| 165 | * |
| 166 | * @param displayId The logical display id. |
| 167 | * @param cih The compatibility info, or null if none is required. |
| 168 | * @return The display object, or null if there is no display with the given id. |
| 169 | */ |
| 170 | public Display getCompatibleDisplay(int displayId, CompatibilityInfoHolder cih) { |
| 171 | DisplayInfo displayInfo = getDisplayInfo(displayId); |
| 172 | if (displayInfo == null) { |
| 173 | return null; |
| 174 | } |
| 175 | return new Display(this, displayId, displayInfo, cih); |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * Gets information about a logical display without applying any compatibility metrics. |
| 180 | * |
| 181 | * @param displayId The logical display id. |
| 182 | * @return The display object, or null if there is no display with the given id. |
| 183 | */ |
| 184 | public Display getRealDisplay(int displayId) { |
| 185 | return getCompatibleDisplay(displayId, null); |
| 186 | } |
| 187 | |
| 188 | public void registerDisplayListener(DisplayListener listener, Handler handler) { |
| 189 | if (listener == null) { |
| 190 | throw new IllegalArgumentException("listener must not be null"); |
| 191 | } |
| 192 | |
| 193 | synchronized (mLock) { |
| 194 | int index = findDisplayListenerLocked(listener); |
| 195 | if (index < 0) { |
| 196 | mDisplayListeners.add(new DisplayListenerDelegate(listener, handler)); |
| 197 | registerCallbackIfNeededLocked(); |
| 198 | } |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | public void unregisterDisplayListener(DisplayListener listener) { |
| 203 | if (listener == null) { |
| 204 | throw new IllegalArgumentException("listener must not be null"); |
| 205 | } |
| 206 | |
| 207 | synchronized (mLock) { |
| 208 | int index = findDisplayListenerLocked(listener); |
| 209 | if (index >= 0) { |
| 210 | DisplayListenerDelegate d = mDisplayListeners.get(index); |
| 211 | d.clearEvents(); |
| 212 | mDisplayListeners.remove(index); |
| 213 | } |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | private int findDisplayListenerLocked(DisplayListener listener) { |
| 218 | final int numListeners = mDisplayListeners.size(); |
| 219 | for (int i = 0; i < numListeners; i++) { |
| 220 | if (mDisplayListeners.get(i).mListener == listener) { |
| 221 | return i; |
| 222 | } |
| 223 | } |
| 224 | return -1; |
| 225 | } |
| 226 | |
| 227 | private void registerCallbackIfNeededLocked() { |
| 228 | if (mCallback == null) { |
| 229 | mCallback = new DisplayManagerCallback(); |
| 230 | try { |
| 231 | mDm.registerCallback(mCallback); |
| 232 | } catch (RemoteException ex) { |
| 233 | Log.e(TAG, "Failed to register callback with display manager service.", ex); |
| 234 | mCallback = null; |
| 235 | } |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | private void handleDisplayEvent(int displayId, int event) { |
| 240 | synchronized (mLock) { |
Jeff Brown | 4ed8fe7 | 2012-08-30 18:18:29 -0700 | [diff] [blame] | 241 | if (USE_CACHE) { |
| 242 | mDisplayInfoCache.remove(displayId); |
Jeff Brown | bd6e150 | 2012-08-28 03:27:37 -0700 | [diff] [blame] | 243 | |
Jeff Brown | 4ed8fe7 | 2012-08-30 18:18:29 -0700 | [diff] [blame] | 244 | if (event == EVENT_DISPLAY_ADDED || event == EVENT_DISPLAY_REMOVED) { |
| 245 | mDisplayIdCache = null; |
| 246 | } |
Jeff Brown | bd6e150 | 2012-08-28 03:27:37 -0700 | [diff] [blame] | 247 | } |
| 248 | |
| 249 | final int numListeners = mDisplayListeners.size(); |
| 250 | for (int i = 0; i < numListeners; i++) { |
| 251 | mDisplayListeners.get(i).sendDisplayEvent(displayId, event); |
| 252 | } |
| 253 | } |
| 254 | } |
| 255 | |
Jeff Brown | e08ae38 | 2012-09-07 20:36:36 -0700 | [diff] [blame] | 256 | public void scanWifiDisplays() { |
| 257 | try { |
| 258 | mDm.scanWifiDisplays(); |
| 259 | } catch (RemoteException ex) { |
| 260 | Log.e(TAG, "Failed to scan for Wifi displays.", ex); |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | public void connectWifiDisplay(String deviceAddress) { |
| 265 | if (deviceAddress == null) { |
| 266 | throw new IllegalArgumentException("deviceAddress must not be null"); |
| 267 | } |
| 268 | |
| 269 | try { |
| 270 | mDm.connectWifiDisplay(deviceAddress); |
| 271 | } catch (RemoteException ex) { |
| 272 | Log.e(TAG, "Failed to connect to Wifi display " + deviceAddress + ".", ex); |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | public void disconnectWifiDisplay() { |
| 277 | try { |
| 278 | mDm.disconnectWifiDisplay(); |
| 279 | } catch (RemoteException ex) { |
| 280 | Log.e(TAG, "Failed to disconnect from Wifi display.", ex); |
| 281 | } |
| 282 | } |
| 283 | |
Jeff Brown | 89d5546 | 2012-09-19 11:33:42 -0700 | [diff] [blame^] | 284 | public void renameWifiDisplay(String deviceAddress, String alias) { |
| 285 | if (deviceAddress == null) { |
| 286 | throw new IllegalArgumentException("deviceAddress must not be null"); |
| 287 | } |
| 288 | |
| 289 | try { |
| 290 | mDm.renameWifiDisplay(deviceAddress, alias); |
| 291 | } catch (RemoteException ex) { |
| 292 | Log.e(TAG, "Failed to rename Wifi display " + deviceAddress |
| 293 | + " with alias " + alias + ".", ex); |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | public void forgetWifiDisplay(String deviceAddress) { |
| 298 | if (deviceAddress == null) { |
| 299 | throw new IllegalArgumentException("deviceAddress must not be null"); |
| 300 | } |
| 301 | |
| 302 | try { |
| 303 | mDm.forgetWifiDisplay(deviceAddress); |
| 304 | } catch (RemoteException ex) { |
| 305 | Log.e(TAG, "Failed to forget Wifi display.", ex); |
| 306 | } |
| 307 | } |
| 308 | |
Jeff Brown | e08ae38 | 2012-09-07 20:36:36 -0700 | [diff] [blame] | 309 | public WifiDisplayStatus getWifiDisplayStatus() { |
| 310 | try { |
| 311 | return mDm.getWifiDisplayStatus(); |
| 312 | } catch (RemoteException ex) { |
| 313 | Log.e(TAG, "Failed to get Wifi display status.", ex); |
| 314 | return new WifiDisplayStatus(); |
| 315 | } |
| 316 | } |
| 317 | |
Jeff Brown | bd6e150 | 2012-08-28 03:27:37 -0700 | [diff] [blame] | 318 | private final class DisplayManagerCallback extends IDisplayManagerCallback.Stub { |
| 319 | @Override |
| 320 | public void onDisplayEvent(int displayId, int event) { |
| 321 | if (DEBUG) { |
| 322 | Log.d(TAG, "onDisplayEvent: displayId=" + displayId + ", event=" + event); |
| 323 | } |
| 324 | handleDisplayEvent(displayId, event); |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | private static final class DisplayListenerDelegate extends Handler { |
| 329 | public final DisplayListener mListener; |
| 330 | |
| 331 | public DisplayListenerDelegate(DisplayListener listener, Handler handler) { |
| 332 | super(handler != null ? handler.getLooper() : Looper.myLooper(), null, true /*async*/); |
| 333 | mListener = listener; |
| 334 | } |
| 335 | |
| 336 | public void sendDisplayEvent(int displayId, int event) { |
| 337 | Message msg = obtainMessage(event, displayId, 0); |
| 338 | sendMessage(msg); |
| 339 | } |
| 340 | |
| 341 | public void clearEvents() { |
| 342 | removeCallbacksAndMessages(null); |
| 343 | } |
| 344 | |
| 345 | @Override |
| 346 | public void handleMessage(Message msg) { |
| 347 | switch (msg.what) { |
| 348 | case EVENT_DISPLAY_ADDED: |
| 349 | mListener.onDisplayAdded(msg.arg1); |
| 350 | break; |
| 351 | case EVENT_DISPLAY_CHANGED: |
| 352 | mListener.onDisplayChanged(msg.arg1); |
| 353 | break; |
| 354 | case EVENT_DISPLAY_REMOVED: |
| 355 | mListener.onDisplayRemoved(msg.arg1); |
| 356 | break; |
| 357 | } |
| 358 | } |
| 359 | } |
| 360 | } |