| /* |
| * Copyright 2010 Apple Inc. All rights reserved. |
| * Copyright (C) 2012 Samsung Electronics. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "modules/device_orientation/DeviceSensorEventController.h" |
| |
| #include "core/dom/Document.h" |
| #include "core/page/DOMWindow.h" |
| |
| namespace WebCore { |
| |
| DeviceSensorEventController::DeviceSensorEventController(Document* document) |
| : m_document(document) |
| , m_isActive(false) |
| , m_needsCheckingNullEvents(true) |
| , m_timer(this, &DeviceSensorEventController::fireDeviceEvent) |
| { |
| } |
| |
| DeviceSensorEventController::~DeviceSensorEventController() |
| { |
| stopUpdating(); |
| } |
| |
| void DeviceSensorEventController::fireDeviceEvent(Timer<DeviceSensorEventController>* timer) |
| { |
| ASSERT_UNUSED(timer, timer == &m_timer); |
| ASSERT(hasLastData()); |
| |
| m_timer.stop(); |
| dispatchDeviceEvent(getLastEvent()); |
| } |
| |
| void DeviceSensorEventController::dispatchDeviceEvent(PassRefPtr<Event> prpEvent) |
| { |
| RefPtr<Event> event = prpEvent; |
| if (m_document && m_document->domWindow() |
| && !m_document->activeDOMObjectsAreSuspended() |
| && !m_document->activeDOMObjectsAreStopped()) |
| m_document->domWindow()->dispatchEvent(event); |
| |
| if (m_needsCheckingNullEvents) { |
| if (isNullEvent(event.get())) |
| stopUpdating(); |
| else |
| m_needsCheckingNullEvents = false; |
| } |
| } |
| |
| void DeviceSensorEventController::startUpdating() |
| { |
| if (m_isActive) |
| return; |
| |
| if (hasLastData() && !m_timer.isActive()) { |
| // Make sure to fire the device motion data as soon as possible. |
| m_timer.startOneShot(0); |
| } |
| |
| registerWithDispatcher(); |
| m_isActive = true; |
| } |
| |
| void DeviceSensorEventController::stopUpdating() |
| { |
| if (!m_isActive) |
| return; |
| |
| if (m_timer.isActive()) |
| m_timer.stop(); |
| |
| unregisterWithDispatcher(); |
| m_isActive = false; |
| } |
| |
| } // namespace WebCore |