[Android] Move the java content/ package to content_public/ to start the split.

content/public/android/java/src/org/chromium/content/browser/DeviceMotionAndOrientation.java

Index: content/public/android/java/src/org/chromium/content/browser/DeviceMotionAndOrientation.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/DeviceMotionAndOrientation.java b/content/public/android/java/src/org/chromium/content/browser/DeviceMotionAndOrientation.java
deleted file mode 100644
index 1af14d5bab76f7e27f2be48b2532c76ac088979c..0000000000000000000000000000000000000000
--- a/content/public/android/java/src/org/chromium/content/browser/DeviceMotionAndOrientation.java
+++ /dev/null
@@ -1,493 +0,0 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.content.browser;
-
-import android.content.Context;
-import android.hardware.Sensor;
-import android.hardware.SensorEvent;
-import android.hardware.SensorEventListener;
-import android.hardware.SensorManager;
-import android.os.Handler;
-import android.os.HandlerThread;
-import android.util.Log;
-
-import com.google.common.annotations.VisibleForTesting;
-
-import org.chromium.base.CalledByNative;
-import org.chromium.base.CollectionUtil;
-import org.chromium.base.JNINamespace;
-import org.chromium.base.WeakContext;
-
-import java.util.HashSet;
-import java.util.List;
-import java.util.Set;
-
-/**
- * Android implementation of the device motion and orientation APIs.
- */
-@JNINamespace("content")
-class DeviceMotionAndOrientation implements SensorEventListener {
-
-    private static final String TAG = "DeviceMotionAndOrientation";
-
-    // These fields are lazily initialized by getHandler().
-    private Thread mThread;
-    private Handler mHandler;
-
-    // The lock to access the mHandler.
-    private final Object mHandlerLock = new Object();
-
-    // Non-zero if and only if we're listening for events.
-    // To avoid race conditions on the C++ side, access must be synchronized.
-    private long mNativePtr;
-
-    // The lock to access the mNativePtr.
-    private final Object mNativePtrLock = new Object();
-
-    // Lazily initialized when registering for notifications.
-    private SensorManagerProxy mSensorManagerProxy;
-
-    // The only instance of that class and its associated lock.
-    private static DeviceMotionAndOrientation sSingleton;
-    private static Object sSingletonLock = new Object();
-
-    /**
-     * constants for using in JNI calls, also see
-     * content/browser/device_orientation/data_fetcher_impl_android.cc
-     */
-    static final int DEVICE_ORIENTATION = 0;
-    static final int DEVICE_MOTION = 1;
-
-    static final Set<Integer> DEVICE_ORIENTATION_SENSORS = CollectionUtil.newHashSet(
-            Sensor.TYPE_ROTATION_VECTOR);
-
-    static final Set<Integer> DEVICE_MOTION_SENSORS = CollectionUtil.newHashSet(
-            Sensor.TYPE_ACCELEROMETER,
-            Sensor.TYPE_LINEAR_ACCELERATION,
-            Sensor.TYPE_GYROSCOPE);
-
-    @VisibleForTesting
-    final Set<Integer> mActiveSensors = new HashSet<Integer>();
-    boolean mDeviceMotionIsActive = false;
-    boolean mDeviceOrientationIsActive = false;
-
-    protected DeviceMotionAndOrientation() {
-    }
-
-    /**
-     * Start listening for sensor events. If this object is already listening
-     * for events, the old callback is unregistered first.
-     *
-     * @param nativePtr Value to pass to nativeGotOrientation() for each event.
-     * @param rateInMilliseconds Requested callback rate in milliseconds. The
-     *            actual rate may be higher. Unwanted events should be ignored.
-     * @param eventType Type of event to listen to, can be either DEVICE_ORIENTATION or
-     *                  DEVICE_MOTION.
-     * @return True on success.
-     */
-    @CalledByNative
-    public boolean start(long nativePtr, int eventType, int rateInMilliseconds) {
-        boolean success = false;
-        synchronized (mNativePtrLock) {
-            switch (eventType) {
-                case DEVICE_ORIENTATION:
-                    success = registerSensors(DEVICE_ORIENTATION_SENSORS, rateInMilliseconds,
-                            true);
-                    break;
-                case DEVICE_MOTION:
-                    // note: device motion spec does not require all sensors to be available
-                    success = registerSensors(DEVICE_MOTION_SENSORS, rateInMilliseconds, false);
-                    break;
-                default:
-                    Log.e(TAG, "Unknown event type: " + eventType);
-                    return false;
-            }
-            if (success) {
-                mNativePtr = nativePtr;
-                setEventTypeActive(eventType, true);
-            }
-            return success;
-        }
-    }
-
-    @CalledByNative
-    public int getNumberActiveDeviceMotionSensors() {
-        Set<Integer> deviceMotionSensors = new HashSet<Integer>(DEVICE_MOTION_SENSORS);
-        deviceMotionSensors.removeAll(mActiveSensors);
-        return DEVICE_MOTION_SENSORS.size() - deviceMotionSensors.size();
-    }
-
-    /**
-     * Stop listening to sensors for a given event type. Ensures that sensors are not disabled
-     * if they are still in use by a different event type.
-     *
-     * @param eventType Type of event to listen to, can be either DEVICE_ORIENTATION or
-     *                  DEVICE_MOTION.
-     * We strictly guarantee that the corresponding native*() methods will not be called
-     * after this method returns.
-     */
-    @CalledByNative
-    public void stop(int eventType) {
-        Set<Integer> sensorsToRemainActive = new HashSet<Integer>();
-        synchronized (mNativePtrLock) {
-            switch (eventType) {
-                case DEVICE_ORIENTATION:
-                    if (mDeviceMotionIsActive) {
-                        sensorsToRemainActive.addAll(DEVICE_MOTION_SENSORS);
-                    }
-                    break;
-                case DEVICE_MOTION:
-                    if (mDeviceOrientationIsActive) {
-                        sensorsToRemainActive.addAll(DEVICE_ORIENTATION_SENSORS);
-                    }
-                    break;
-                default:
-                    Log.e(TAG, "Unknown event type: " + eventType);
-                    return;
-            }
-
-            Set<Integer> sensorsToDeactivate = new HashSet<Integer>(mActiveSensors);
-            sensorsToDeactivate.removeAll(sensorsToRemainActive);
-            unregisterSensors(sensorsToDeactivate);
-            setEventTypeActive(eventType, false);
-            if (mActiveSensors.isEmpty()) {
-                mNativePtr = 0;
-            }
-        }
-    }
-
-    @Override
-    public void onAccuracyChanged(Sensor sensor, int accuracy) {
-        // Nothing
-    }
-
-    @Override
-    public void onSensorChanged(SensorEvent event) {
-        sensorChanged(event.sensor.getType(), event.values);
-    }
-
-    @VisibleForTesting
-    void sensorChanged(int type, float[] values) {
-        switch (type) {
-            case Sensor.TYPE_ACCELEROMETER:
-                if (mDeviceMotionIsActive) {
-                    gotAccelerationIncludingGravity(values[0], values[1], values[2]);
-                }
-                break;
-            case Sensor.TYPE_LINEAR_ACCELERATION:
-                if (mDeviceMotionIsActive) {
-                    gotAcceleration(values[0], values[1], values[2]);
-                }
-                break;
-            case Sensor.TYPE_GYROSCOPE:
-                if (mDeviceMotionIsActive) {
-                    gotRotationRate(values[0], values[1], values[2]);
-                }
-                break;
-            case Sensor.TYPE_ROTATION_VECTOR:
-                if (mDeviceOrientationIsActive) {
-                    getOrientationFromRotationVector(values);
-                }
-                break;
-            default:
-                // Unexpected
-                return;
-        }
-    }
-
-    /**
-     * Returns orientation angles from a rotation matrix, such that the angles are according
-     * to spec {@link http://dev.w3.org/geo/api/spec-source-orientation.html}.
-     * <p>
-     * It is assumed the rotation matrix transforms a 3D column vector from device coordinate system
-     * to the world's coordinate system, as e.g. computed by {@see SensorManager.getRotationMatrix}.
-     * <p>
-     * In particular we compute the decomposition of a given rotation matrix R such that <br>
-     * R = Rz(alpha) * Rx(beta) * Ry(gamma), <br>
-     * where Rz, Rx and Ry are rotation matrices around Z, X and Y axes in the world coordinate
-     * reference frame respectively. The reference frame consists of three orthogonal axes X, Y, Z
-     * where X points East, Y points north and Z points upwards perpendicular to the ground plane.
-     * The computed angles alpha, beta and gamma are in radians and clockwise-positive when viewed
-     * along the positive direction of the corresponding axis. Except for the special case when the
-     * beta angle is +-pi/2 these angles uniquely define the orientation of a mobile device in 3D
-     * space. The alpha-beta-gamma representation resembles the yaw-pitch-roll convention used in
-     * vehicle dynamics, however it does not exactly match it. One of the differences is that the
-     * 'pitch' angle beta is allowed to be within [-pi, pi). A mobile device with pitch angle
-     * greater than pi/2 could correspond to a user lying down and looking upward at the screen.
-     *
-     * <p>
-     * Upon return the array values is filled with the result,
-     * <ul>
-     * <li>values[0]: rotation around the Z axis, alpha in [0, 2*pi)</li>
-     * <li>values[1]: rotation around the X axis, beta in [-pi, pi)</li>
-     * <li>values[2]: rotation around the Y axis, gamma in [-pi/2, pi/2)</li>
-     * </ul>
-     * <p>
-     *
-     * @param R
-     *        a 3x3 rotation matrix {@see SensorManager.getRotationMatrix}.
-     *
-     * @param values
-     *        an array of 3 doubles to hold the result.
-     *
-     * @return the array values passed as argument.
-     */
-    @VisibleForTesting
-    public static double[] computeDeviceOrientationFromRotationMatrix(float[] R, double[] values) {
-        /*
-         * 3x3 (length=9) case:
-         *   /  R[ 0]   R[ 1]   R[ 2]  \
-         *   |  R[ 3]   R[ 4]   R[ 5]  |
-         *   \  R[ 6]   R[ 7]   R[ 8]  /
-         *
-         */
-        if (R.length != 9)
-            return values;
-
-        if (R[8] > 0) {  // cos(beta) > 0
-            values[0] = Math.atan2(-R[1], R[4]);
-            values[1] = Math.asin(R[7]);           // beta (-pi/2, pi/2)
-            values[2] = Math.atan2(-R[6], R[8]);   // gamma (-pi/2, pi/2)
-        } else if (R[8] < 0) {  // cos(beta) < 0
-            values[0] = Math.atan2(R[1], -R[4]);
-            values[1] = -Math.asin(R[7]);
-            values[1] += (values[1] >= 0) ? -Math.PI : Math.PI; // beta [-pi,-pi/2) U (pi/2,pi)
-            values[2] = Math.atan2(R[6], -R[8]);   // gamma (-pi/2, pi/2)
-        } else { // R[8] == 0
-            if (R[6] > 0) {  // cos(gamma) == 0, cos(beta) > 0
-                values[0] = Math.atan2(-R[1], R[4]);
-                values[1] = Math.asin(R[7]);       // beta [-pi/2, pi/2]
-                values[2] = -Math.PI / 2;          // gamma = -pi/2
-            } else if (R[6] < 0) { // cos(gamma) == 0, cos(beta) < 0
-                values[0] = Math.atan2(R[1], -R[4]);
-                values[1] = -Math.asin(R[7]);
-                values[1] += (values[1] >= 0) ? -Math.PI : Math.PI; // beta [-pi,-pi/2) U (pi/2,pi)
-                values[2] = -Math.PI / 2;          // gamma = -pi/2
-            } else { // R[6] == 0, cos(beta) == 0
-                // gimbal lock discontinuity
-                values[0] = Math.atan2(R[3], R[0]);
-                values[1] = (R[7] > 0) ? Math.PI / 2 : -Math.PI / 2;  // beta = +-pi/2
-                values[2] = 0;                                        // gamma = 0
-            }
-        }
-
-        // alpha is in [-pi, pi], make sure it is in [0, 2*pi).
-        if (values[0] < 0)
-            values[0] += 2 * Math.PI; // alpha [0, 2*pi)
-
-        return values;
-    }
-
-    private void getOrientationFromRotationVector(float[] rotationVector) {
-        float[] deviceRotationMatrix = new float[9];
-        SensorManager.getRotationMatrixFromVector(deviceRotationMatrix, rotationVector);
-
-        double[] rotationAngles = new double[3];
-        computeDeviceOrientationFromRotationMatrix(deviceRotationMatrix, rotationAngles);
-
-        gotOrientation(Math.toDegrees(rotationAngles[0]),
-                       Math.toDegrees(rotationAngles[1]),
-                       Math.toDegrees(rotationAngles[2]));
-    }
-
-    private SensorManagerProxy getSensorManagerProxy() {
-        if (mSensorManagerProxy != null) {
-            return mSensorManagerProxy;
-        }
-        SensorManager sensorManager = (SensorManager) WeakContext.getSystemService(
-                Context.SENSOR_SERVICE);
-        if (sensorManager != null) {
-            mSensorManagerProxy = new SensorManagerProxyImpl(sensorManager);
-        }
-        return mSensorManagerProxy;
-    }
-
-    @VisibleForTesting
-    void setSensorManagerProxy(SensorManagerProxy sensorManagerProxy) {
-        mSensorManagerProxy = sensorManagerProxy;
-    }
-
-    private void setEventTypeActive(int eventType, boolean value) {
-        switch (eventType) {
-            case DEVICE_ORIENTATION:
-                mDeviceOrientationIsActive = value;
-                return;
-            case DEVICE_MOTION:
-                mDeviceMotionIsActive = value;
-                return;
-        }
-    }
-
-    /**
-     * @param sensorTypes List of sensors to activate.
-     * @param rateInMilliseconds Intended delay (in milliseconds) between sensor readings.
-     * @param failOnMissingSensor If true the method returns true only if all sensors could be
-     *                            activated. When false the method return true if at least one
-     *                            sensor in sensorTypes could be activated.
-     */
-    private boolean registerSensors(Set<Integer> sensorTypes, int rateInMilliseconds,
-            boolean failOnMissingSensor) {
-        Set<Integer> sensorsToActivate = new HashSet<Integer>(sensorTypes);
-        sensorsToActivate.removeAll(mActiveSensors);
-        boolean success = false;
-
-        for (Integer sensorType : sensorsToActivate) {
-            boolean result = registerForSensorType(sensorType, rateInMilliseconds);
-            if (!result && failOnMissingSensor) {
-                // restore the previous state upon failure
-                unregisterSensors(sensorsToActivate);
-                return false;
-            }
-            if (result) {
-                mActiveSensors.add(sensorType);
-                success = true;
-            }
-        }
-        return success;
-    }
-
-    private void unregisterSensors(Iterable<Integer> sensorTypes) {
-        for (Integer sensorType : sensorTypes) {
-            if (mActiveSensors.contains(sensorType)) {
-                getSensorManagerProxy().unregisterListener(this, sensorType);
-                mActiveSensors.remove(sensorType);
-            }
-        }
-    }
-
-    private boolean registerForSensorType(int type, int rateInMilliseconds) {
-        SensorManagerProxy sensorManager = getSensorManagerProxy();
-        if (sensorManager == null) {
-            return false;
-        }
-        final int rateInMicroseconds = 1000 * rateInMilliseconds;
-        return sensorManager.registerListener(this, type, rateInMicroseconds, getHandler());
-    }
-
-    protected void gotOrientation(double alpha, double beta, double gamma) {
-        synchronized (mNativePtrLock) {
-            if (mNativePtr != 0) {
-                nativeGotOrientation(mNativePtr, alpha, beta, gamma);
-            }
-        }
-    }
-
-    protected void gotAcceleration(double x, double y, double z) {
-        synchronized (mNativePtrLock) {
-            if (mNativePtr != 0) {
-                nativeGotAcceleration(mNativePtr, x, y, z);
-            }
-        }
-    }
-
-    protected void gotAccelerationIncludingGravity(double x, double y, double z) {
-        synchronized (mNativePtrLock) {
-            if (mNativePtr != 0) {
-                nativeGotAccelerationIncludingGravity(mNativePtr, x, y, z);
-            }
-        }
-    }
-
-    protected void gotRotationRate(double alpha, double beta, double gamma) {
-        synchronized (mNativePtrLock) {
-            if (mNativePtr != 0) {
-                nativeGotRotationRate(mNativePtr, alpha, beta, gamma);
-            }
-        }
-    }
-
-    private Handler getHandler() {
-        // TODO(timvolodine): Remove the mHandlerLock when sure that getHandler is not called
-        // from multiple threads. This will be the case when device motion and device orientation
-        // use the same polling thread (also see crbug/234282).
-        synchronized (mHandlerLock) {
-            if (mHandler == null) {
-                HandlerThread thread = new HandlerThread("DeviceMotionAndOrientation");
-                thread.start();
-                mHandler = new Handler(thread.getLooper());  // blocks on thread start
-            }
-            return mHandler;
-        }
-    }
-
-    @CalledByNative
-    static DeviceMotionAndOrientation getInstance() {
-        synchronized (sSingletonLock) {
-            if (sSingleton == null) {
-                sSingleton = new DeviceMotionAndOrientation();
-            }
-            return sSingleton;
-        }
-    }
-
-    /**
-     * Native JNI calls,
-     * see content/browser/device_orientation/data_fetcher_impl_android.cc
-     */
-
-    /**
-     * Orientation of the device with respect to its reference frame.
-     */
-    private native void nativeGotOrientation(
-            long nativeDataFetcherImplAndroid,
-            double alpha, double beta, double gamma);
-
-    /**
-     * Linear acceleration without gravity of the device with respect to its body frame.
-     */
-    private native void nativeGotAcceleration(
-            long nativeDataFetcherImplAndroid,
-            double x, double y, double z);
-
-    /**
-     * Acceleration including gravity of the device with respect to its body frame.
-     */
-    private native void nativeGotAccelerationIncludingGravity(
-            long nativeDataFetcherImplAndroid,
-            double x, double y, double z);
-
-    /**
-     * Rotation rate of the device with respect to its body frame.
-     */
-    private native void nativeGotRotationRate(
-            long nativeDataFetcherImplAndroid,
-            double alpha, double beta, double gamma);
-
-    /**
-     * Need the an interface for SensorManager for testing.
-     */
-    interface SensorManagerProxy {
-        public boolean registerListener(SensorEventListener listener, int sensorType, int rate,
-                Handler handler);
-        public void unregisterListener(SensorEventListener listener, int sensorType);
-    }
-
-    static class SensorManagerProxyImpl implements SensorManagerProxy {
-        private final SensorManager mSensorManager;
-
-        SensorManagerProxyImpl(SensorManager sensorManager) {
-            mSensorManager = sensorManager;
-        }
-
-        @Override
-        public boolean registerListener(SensorEventListener listener, int sensorType, int rate,
-                Handler handler) {
-            List<Sensor> sensors = mSensorManager.getSensorList(sensorType);
-            if (sensors.isEmpty()) {
-                return false;
-            }
-            return mSensorManager.registerListener(listener, sensors.get(0), rate, handler);
-        }
-
-        @Override
-        public void unregisterListener(SensorEventListener listener, int sensorType) {
-            List<Sensor> sensors = mSensorManager.getSensorList(sensorType);
-            if (!sensors.isEmpty()) {
-                mSensorManager.unregisterListener(listener, sensors.get(0));
-            }
-        }
-    }
-
-}