Implements part of Device Motion in the Renderer

content/browser/device_orientation/motion.h

+// Copyright (c) 2012 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.
+
+#ifndef CONTENT_BROWSER_DEVICE_ORIENTATION_MOTION_H_
+#define CONTENT_BROWSER_DEVICE_ORIENTATION_MOTION_H_
+
+namespace device_orientation {
+class Motion {
+ public:
+  // acceleration_x, acceleration_y, and acceleration_z are the accelerations
+  // excluding gravity along the axes specified in
+  // http://dev.w3.org/geo/api/spec-source-orientation.html
+
+  // acceleration_including_gravity_x, acceleration_including_gravity_y, and
+  // acceleration_including_gravity_z are the accelerations including gravity
+  // along the same axes as above
+
+  // rotation_rate_alpha, rotation_rate_beta, and rotataion_rate_gamma are the
+  // rotations around the same axes as above
+
+  // interval is the time interval at which data is obtained from the hardware,
+  // as specified in the document referenced above
+
+  // can_provide_{acceleration_x, acceleration_y, acceleration_z,
+  // acceleration_including_gravity_x, acceleration_including_gravity_y,
+  // acceleration_including_gravity_z, rotation_rate_alpha, rotation_rate_beta,
+  // rotation_rate_gamma, interval} is true if data can be provided for that
+  // variable
+
+  Motion();
+  Motion(const Motion&);

[bulach, 2012/07/02 12:47:56]

is this copy constructor necessary? if possible, it's probably best to avoid it,
i.e., mark it as explicit and copy it where needed.. and then if possible, also
add a "DISALLOW_COPY_AND_ASSIGN(Motion)" as the last line in the private
section..

[aousterh, 2012/07/04 13:31:55]

The copy constructor is used in device_orientation_browsertest and will probably
be used in the provider (as is the case for orientation). I'll also add in the
assignment operator, since the style guide says that that should be defined if
the copy constructor is defined.

+
+  static Motion Empty() { return Motion(); }
+
+  bool IsEmpty() const {
+    return !can_provide_acceleration_x_ && !can_provide_acceleration_y_ &&
+        !can_provide_acceleration_z_ &&
+        !can_provide_acceleration_including_gravity_x_ &&
+        !can_provide_acceleration_including_gravity_y_ &&
+        !can_provide_acceleration_including_gravity_z_ &&
+        !can_provide_rotation_rate_alpha_ &&
+        !can_provide_rotation_rate_beta_ &&
+        !can_provide_rotation_rate_gamma_ &&
+        !can_provide_interval_;
+  }
+
+  void setAccelerationX(double accelerationX) {

[bulach, 2012/07/02 12:47:56]

nit: wrong case, needs to s/set/Set/ and s/can/Can/ (and a few others below.. :)
or rather, set_acceleration_x / can_provide_acceleration_x / acceleration_x as
these methods are all simple inlined getters/setters..

[aousterh, 2012/07/04 13:31:55]

Done.

+    can_provide_acceleration_x_ = true;
+    acceleration_x_ = accelerationX;
+  }
+  bool canProvideAccelerationX() const { return can_provide_acceleration_x_; }
+  double accelerationX() const { return acceleration_x_; }
+
+  void setAccelerationY(double accelerationY) {
+    can_provide_acceleration_y_ = true;
+    acceleration_y_ = accelerationY;
+  }
+  bool canProvideAccelerationY() const { return can_provide_acceleration_y_; }
+  double accelerationY() const { return acceleration_y_; }
+
+  void setAccelerationZ(double accelerationZ) {
+    can_provide_acceleration_z_ = true;
+    acceleration_z_ = accelerationZ;
+  }
+  bool canProvideAccelerationZ() const { return can_provide_acceleration_z_; }
+  double accelerationZ() const { return acceleration_z_; }
+
+  void setAccelerationIncludingGravityX(double accelerationIncludingGravityX) {
+    can_provide_acceleration_including_gravity_x_ = true;
+    acceleration_including_gravity_x_ = accelerationIncludingGravityX;
+  }
+  bool canProvideAccelerationIncludingGravityX() const {
+    return can_provide_acceleration_x_;
+  }
+  double accelerationIncludingGravityX() const {
+    return acceleration_including_gravity_x_;
+  }
+
+  void setAccelerationIncludingGravityY(double accelerationIncludingGravityY) {
+    can_provide_acceleration_including_gravity_y_ = true;
+    acceleration_including_gravity_y_ = accelerationIncludingGravityY;
+  }
+  bool canProvideAccelerationIncludingGravityY() const {
+    return can_provide_acceleration_y_;
+  }
+  double accelerationIncludingGravityY() const {
+    return acceleration_including_gravity_y_;
+  }
+
+  void setAccelerationIncludingGravityZ(double accelerationIncludingGravityZ) {
+    can_provide_acceleration_including_gravity_z_ = true;
+    acceleration_including_gravity_z_ = accelerationIncludingGravityZ;
+  }
+  bool canProvideAccelerationIncludingGravityZ() const {
+    return can_provide_acceleration_z_;
+  }
+  double accelerationIncludingGravityZ() const {
+    return acceleration_including_gravity_z_;
+  }
+
+  void setRotationRateAlpha(double rotationRateAlpha) {
+    can_provide_rotation_rate_alpha_ = true;
+    rotation_rate_alpha_ = rotationRateAlpha;
+  }
+  bool canProvideRotationRateAlpha() const {
+    return can_provide_rotation_rate_alpha_;
+  }
+  double rotationRateAlpha() const { return rotation_rate_alpha_; }
+
+  void setRotationRateBeta(double rotationRateBeta) {
+    can_provide_rotation_rate_beta_ = true;
+    rotation_rate_beta_ = rotationRateBeta;
+  }
+  bool canProvideRotationRateBeta() const {
+    return can_provide_rotation_rate_beta_;
+  }
+  double rotationRateBeta() const { return rotation_rate_beta_; }
+
+  void setRotationRateGamma(double rotationRateGamma) {
+    can_provide_rotation_rate_gamma_ = true;
+    rotation_rate_gamma_ = rotationRateGamma;
+  }
+  bool canProvideRotationRateGamma() const {
+    return can_provide_rotation_rate_gamma_;
+  }
+  double rotationRateGamma() const { return rotation_rate_gamma_; }
+
+  void setInterval(double interval) {
+    can_provide_interval_ = true;
+    interval_ = interval;
+  }
+  bool canProvideInterval() const { return can_provide_interval_; }
+  double interval() const { return interval_; }
+
+ private:
+  double acceleration_x_;
+  double acceleration_y_;
+  double acceleration_z_;
+  double acceleration_including_gravity_x_;
+  double acceleration_including_gravity_y_;
+  double acceleration_including_gravity_z_;
+  double rotation_rate_alpha_;
+  double rotation_rate_beta_;
+  double rotation_rate_gamma_;
+  double interval_;
+  bool can_provide_acceleration_x_;
+  bool can_provide_acceleration_y_;
+  bool can_provide_acceleration_z_;
+  bool can_provide_acceleration_including_gravity_x_;
+  bool can_provide_acceleration_including_gravity_y_;
+  bool can_provide_acceleration_including_gravity_z_;
+  bool can_provide_rotation_rate_alpha_;
+  bool can_provide_rotation_rate_beta_;
+  bool can_provide_rotation_rate_gamma_;
+  bool can_provide_interval_;
+};
+
+}  // namespace device_orientation
+
+#endif  // CONTENT_BROWSER_DEVICE_ORIENTATION_MOTION_H_