Implements part of Device Motion in the Renderer

content/browser/device_orientation/motion.cc

+// 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.
+
+#include "content/browser/device_orientation/motion.h"
+
+#include "content/common/device_motion_messages.h"
+
+namespace content {
+
+Motion::Motion()
+    : can_provide_acceleration_x_(false),
+      can_provide_acceleration_y_(false),
+      can_provide_acceleration_z_(false),
+      can_provide_acceleration_including_gravity_x_(false),
+      can_provide_acceleration_including_gravity_y_(false),
+      can_provide_acceleration_including_gravity_z_(false),
+      can_provide_rotation_rate_alpha_(false),
+      can_provide_rotation_rate_beta_(false),
+      can_provide_rotation_rate_gamma_(false),
+      can_provide_interval_(false) {
+}
+
+Motion::~Motion() {
+}
+
+IPC::Message* Motion::CreateIPCMessage(int render_view_id) const {
+  DeviceMotionMsg_Updated_Params params;
+
+  params.can_provide_acceleration_x = can_provide_acceleration_x_;
+  params.acceleration_x = acceleration_x_;
+  params.can_provide_acceleration_y = can_provide_acceleration_y_;
+  params.acceleration_y = acceleration_y_;
+  params.can_provide_acceleration_z = can_provide_acceleration_z_;
+  params.acceleration_z = acceleration_z_;
+
+  params.can_provide_acceleration_including_gravity_x =
+      can_provide_acceleration_including_gravity_x_;
+  params.acceleration_including_gravity_x = acceleration_including_gravity_x_;
+  params.can_provide_acceleration_including_gravity_y =
+      can_provide_acceleration_including_gravity_y_;
+  params.acceleration_including_gravity_y = acceleration_including_gravity_y_;
+  params.can_provide_acceleration_including_gravity_z =
+      can_provide_acceleration_including_gravity_z_;
+  params.acceleration_including_gravity_z = acceleration_including_gravity_z_;
+
+  params.can_provide_rotation_rate_alpha = can_provide_rotation_rate_alpha_;
+  params.rotation_rate_alpha = rotation_rate_alpha_;
+  params.can_provide_rotation_rate_beta = can_provide_rotation_rate_beta_;
+  params.rotation_rate_beta = rotation_rate_beta_;
+  params.can_provide_rotation_rate_gamma = can_provide_rotation_rate_gamma_;
+  params.rotation_rate_gamma = rotation_rate_gamma_;
+
+  params.can_provide_interval = can_provide_interval_;
+  params.interval = interval_;
+
+  return new DeviceMotionMsg_Updated(render_view_id, params);
+}
+
+// Should always fire new motion events so that they occur at regular intervals.
+// The firing frequency is determined by the polling frequency in ProviderImpl.
+bool Motion::ShouldFireEvent(const DeviceData* old_data) const {
+  return true;
+}
+
+};  // namespace content