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-rw-r--r--core/java/android/webkit/DeviceOrientationService.java225
1 files changed, 0 insertions, 225 deletions
diff --git a/core/java/android/webkit/DeviceOrientationService.java b/core/java/android/webkit/DeviceOrientationService.java
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index a4d240d..0000000
--- a/core/java/android/webkit/DeviceOrientationService.java
+++ /dev/null
@@ -1,225 +0,0 @@
-/*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.webkit;
-
-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.webkit.DeviceMotionAndOrientationManager;
-import java.lang.Runnable;
-import java.util.List;
-
-
-final class DeviceOrientationService implements SensorEventListener {
- // The gravity vector expressed in the body frame.
- private float[] mGravityVector;
- // The geomagnetic vector expressed in the body frame.
- private float[] mMagneticFieldVector;
-
- private DeviceMotionAndOrientationManager mManager;
- private boolean mIsRunning;
- private Handler mHandler;
- private SensorManager mSensorManager;
- private Context mContext;
- private Double mAlpha;
- private Double mBeta;
- private Double mGamma;
- private boolean mHaveSentErrorEvent;
-
- private static final double DELTA_DEGRESS = 1.0;
-
- public DeviceOrientationService(DeviceMotionAndOrientationManager manager, Context context) {
- mManager = manager;
- assert(mManager != null);
- mContext = context;
- assert(mContext != null);
- }
-
- public void start() {
- mIsRunning = true;
- registerForSensors();
- }
-
- public void stop() {
- mIsRunning = false;
- unregisterFromSensors();
- }
-
- public void suspend() {
- if (mIsRunning) {
- unregisterFromSensors();
- }
- }
-
- public void resume() {
- if (mIsRunning) {
- registerForSensors();
- }
- }
-
- private void sendErrorEvent() {
- assert WebViewCore.THREAD_NAME.equals(Thread.currentThread().getName());
- // The spec requires that each listener receives the error event only once.
- if (mHaveSentErrorEvent)
- return;
- mHaveSentErrorEvent = true;
- mHandler.post(new Runnable() {
- @Override
- public void run() {
- assert WebViewCore.THREAD_NAME.equals(Thread.currentThread().getName());
- if (mIsRunning) {
- // The special case of all nulls is used to signify a failure to get data.
- mManager.onOrientationChange(null, null, null);
- }
- }
- });
- }
-
- private void registerForSensors() {
- if (mHandler == null) {
- mHandler = new Handler();
- }
- if (!registerForAccelerometerSensor() || !registerForMagneticFieldSensor()) {
- unregisterFromSensors();
- sendErrorEvent();
- }
- }
-
- private void getOrientationUsingGetRotationMatrix() {
- if (mGravityVector == null || mMagneticFieldVector == null) {
- return;
- }
-
- // Get the rotation matrix.
- // The rotation matrix that transforms from the body frame to the earth frame.
- float[] deviceRotationMatrix = new float[9];
- if (!SensorManager.getRotationMatrix(
- deviceRotationMatrix, null, mGravityVector, mMagneticFieldVector)) {
- return;
- }
-
- // Convert rotation matrix to rotation angles.
- // Assuming that the rotations are appied in the order listed at
- // http://developer.android.com/reference/android/hardware/SensorEvent.html#values
- // the rotations are applied about the same axes and in the same order as required by the
- // API. The only conversions are sign changes as follows.
- // The angles are in radians
- float[] rotationAngles = new float[3];
- SensorManager.getOrientation(deviceRotationMatrix, rotationAngles);
- double alpha = Math.toDegrees(-rotationAngles[0]);
- while (alpha < 0.0) { alpha += 360.0; } // [0, 360)
- double beta = Math.toDegrees(-rotationAngles[1]);
- while (beta < -180.0) { beta += 360.0; } // [-180, 180)
- double gamma = Math.toDegrees(rotationAngles[2]);
- while (gamma < -90.0) { gamma += 360.0; } // [-90, 90)
-
- maybeSendChange(alpha, beta, gamma);
- }
-
- private SensorManager getSensorManager() {
- assert WebViewCore.THREAD_NAME.equals(Thread.currentThread().getName());
- if (mSensorManager == null) {
- mSensorManager = (SensorManager) mContext.getSystemService(Context.SENSOR_SERVICE);
- }
- return mSensorManager;
- }
-
- private boolean registerForAccelerometerSensor() {
- List<Sensor> sensors = getSensorManager().getSensorList(Sensor.TYPE_ACCELEROMETER);
- if (sensors.isEmpty()) {
- return false;
- }
- // TODO: Consider handling multiple sensors.
- return getSensorManager().registerListener(
- this, sensors.get(0), SensorManager.SENSOR_DELAY_FASTEST, mHandler);
- }
-
- private boolean registerForMagneticFieldSensor() {
- List<Sensor> sensors = getSensorManager().getSensorList(Sensor.TYPE_MAGNETIC_FIELD);
- if (sensors.isEmpty()) {
- return false;
- }
- // TODO: Consider handling multiple sensors.
- return getSensorManager().registerListener(
- this, sensors.get(0), SensorManager.SENSOR_DELAY_FASTEST, mHandler);
- }
-
- private void unregisterFromSensors() {
- getSensorManager().unregisterListener(this);
- }
-
- private void maybeSendChange(double alpha, double beta, double gamma) {
- assert WebViewCore.THREAD_NAME.equals(Thread.currentThread().getName());
- if (mAlpha == null || mBeta == null || mGamma == null
- || Math.abs(alpha - mAlpha) > DELTA_DEGRESS
- || Math.abs(beta - mBeta) > DELTA_DEGRESS
- || Math.abs(gamma - mGamma) > DELTA_DEGRESS) {
- mAlpha = alpha;
- mBeta = beta;
- mGamma = gamma;
- mManager.onOrientationChange(mAlpha, mBeta, mGamma);
- // Now that we have successfully sent some data, reset whether we've sent an error.
- mHaveSentErrorEvent = false;
- }
- }
-
- /**
- * SensorEventListener implementation.
- * Callbacks happen on the thread on which we registered - the WebCore thread.
- */
- @Override
- public void onSensorChanged(SensorEvent event) {
- assert(event.values.length == 3);
- assert WebViewCore.THREAD_NAME.equals(Thread.currentThread().getName());
-
- // We may get callbacks after the call to getSensorManager().unregisterListener() returns.
- if (!mIsRunning) {
- return;
- }
-
- switch (event.sensor.getType()) {
- case Sensor.TYPE_ACCELEROMETER:
- if (mGravityVector == null) {
- mGravityVector = new float[3];
- }
- mGravityVector[0] = event.values[0];
- mGravityVector[1] = event.values[1];
- mGravityVector[2] = event.values[2];
- getOrientationUsingGetRotationMatrix();
- break;
- case Sensor.TYPE_MAGNETIC_FIELD:
- if (mMagneticFieldVector == null) {
- mMagneticFieldVector = new float[3];
- }
- mMagneticFieldVector[0] = event.values[0];
- mMagneticFieldVector[1] = event.values[1];
- mMagneticFieldVector[2] = event.values[2];
- getOrientationUsingGetRotationMatrix();
- break;
- default:
- assert(false);
- }
- }
-
- @Override
- public void onAccuracyChanged(Sensor sensor, int accuracy) {
- assert WebViewCore.THREAD_NAME.equals(Thread.currentThread().getName());
- }
-}
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