Add support for input devices that have vibrators.

Added a getVibrator() method to InputDevice which returns a Vibrator
associated with that input device.  Its uses the same API as the
system vibrator which makes it easy for applications to be modified
to use one or the other.

Bug: 6334179
Change-Id: Ifc7f13dbcb778670f3f1c07ccc562334e6109d2e

services/java/com/android/server/input/InputManagerService.java

@@ -105,6 +105,12 @@ public class InputManagerService extends IInputManager.Stub implements Watchdog.
             mTempInputDevicesChangedListenersToNotify =
                     new ArrayList<InputDevicesChangedListenerRecord>(); // handler thread only
 
+    // State for vibrator tokens.
+    private Object mVibratorLock = new Object();
+    private HashMap<IBinder, VibratorToken> mVibratorTokens =
+            new HashMap<IBinder, VibratorToken>();
+    private int mNextVibratorTokenValue;
+
     // State for the currently installed input filter.
     final Object mInputFilterLock = new Object();
     InputFilter mInputFilter; // guarded by mInputFilterLock
@@ -142,6 +148,9 @@ public class InputManagerService extends IInputManager.Stub implements Watchdog.
             InputChannel fromChannel, InputChannel toChannel);
     private static native void nativeSetPointerSpeed(int ptr, int speed);
     private static native void nativeSetShowTouches(int ptr, boolean enabled);
+    private static native void nativeVibrate(int ptr, int deviceId, long[] pattern,
+            int repeat, int token);
+    private static native void nativeCancelVibrate(int ptr, int deviceId, int token);
     private static native String nativeDump(int ptr);
     private static native void nativeMonitor(int ptr);
 
@@ -792,6 +801,65 @@ public class InputManagerService extends IInputManager.Stub implements Watchdog.
         return result;
     }
 
+    // Binder call
+    @Override
+    public void vibrate(int deviceId, long[] pattern, int repeat, IBinder token) {
+        if (repeat >= pattern.length) {
+            throw new ArrayIndexOutOfBoundsException();
+        }
+
+        VibratorToken v;
+        synchronized (mVibratorLock) {
+            v = mVibratorTokens.get(token);
+            if (v == null) {
+                v = new VibratorToken(deviceId, token, mNextVibratorTokenValue++);
+                try {
+                    token.linkToDeath(v, 0);
+                } catch (RemoteException ex) {
+                    // give up
+                    throw new RuntimeException(ex);
+                }
+                mVibratorTokens.put(token, v);
+            }
+        }
+
+        synchronized (v) {
+            v.mVibrating = true;
+            nativeVibrate(mPtr, deviceId, pattern, repeat, v.mTokenValue);
+        }
+    }
+
+    // Binder call
+    @Override
+    public void cancelVibrate(int deviceId, IBinder token) {
+        VibratorToken v;
+        synchronized (mVibratorLock) {
+            v = mVibratorTokens.get(token);
+            if (v == null || v.mDeviceId != deviceId) {
+                return; // nothing to cancel
+            }
+        }
+
+        cancelVibrateIfNeeded(v);
+    }
+
+    void onVibratorTokenDied(VibratorToken v) {
+        synchronized (mVibratorLock) {
+            mVibratorTokens.remove(v.mToken);
+        }
+
+        cancelVibrateIfNeeded(v);
+    }
+
+    private void cancelVibrateIfNeeded(VibratorToken v) {
+        synchronized (v) {
+            if (v.mVibrating) {
+                nativeCancelVibrate(mPtr, v.mDeviceId, v.mTokenValue);
+                v.mVibrating = false;
+            }
+        }
+    }
+
     @Override
     public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
         if (mContext.checkCallingOrSelfPermission("android.permission.DUMP")
@@ -1108,4 +1176,26 @@ public class InputManagerService extends IInputManager.Stub implements Watchdog.
             }
         }
     }
+
+    private final class VibratorToken implements DeathRecipient {
+        public final int mDeviceId;
+        public final IBinder mToken;
+        public final int mTokenValue;
+
+        public boolean mVibrating;
+
+        public VibratorToken(int deviceId, IBinder token, int tokenValue) {
+            mDeviceId = deviceId;
+            mToken = token;
+            mTokenValue = tokenValue;
+        }
+
+        @Override
+        public void binderDied() {
+            if (DEBUG) {
+                Slog.d(TAG, "Vibrator token died.");
+            }
+            onVibratorTokenDied(this);
+        }
+    }
 }