Revert of Generalize and refactor DeviceSensorEvent* architecture to support multi-event type targets.

Source/modules/device_orientation/DeviceMotionController.cpp

Index: Source/modules/device_orientation/DeviceMotionController.cpp
diff --git a/Source/modules/device_orientation/DeviceMotionController.cpp b/Source/modules/device_orientation/DeviceMotionController.cpp
index ed76d86d4db46910b7334b8c8500fbf526fb9a93..02498d07240ac6daa7bd41d6b0409517ad44a915 100644
--- a/Source/modules/device_orientation/DeviceMotionController.cpp
+++ b/Source/modules/device_orientation/DeviceMotionController.cpp
@@ -1,12 +1,35 @@
-// Copyright 2014 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.
+/*
+ * 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/DeviceMotionController.h"
 
 #include "core/dom/Document.h"
-#include "modules/EventModules.h"
+#include "core/frame/DOMWindow.h"
+#include "core/page/Page.h"
 #include "modules/device_orientation/DeviceMotionData.h"
 #include "modules/device_orientation/DeviceMotionDispatcher.h"
 #include "modules/device_orientation/DeviceMotionEvent.h"
@@ -14,13 +37,20 @@
 namespace WebCore {
 
 DeviceMotionController::DeviceMotionController(Document& document)
-    : DeviceSingleWindowEventController(document)
+    : DeviceSensorEventController(document.page())
+    , DOMWindowLifecycleObserver(document.domWindow())
+    , m_document(document)
 {
 }
 
 DeviceMotionController::~DeviceMotionController()
 {
     stopUpdating();
+}
+
+void DeviceMotionController::didChangeDeviceMotion(DeviceMotionData* deviceMotionData)
+{
+    dispatchDeviceEvent(DeviceMotionEvent::create(EventTypeNames::devicemotion, deviceMotionData));
 }
 
 const char* DeviceMotionController::supplementName()
@@ -43,30 +73,56 @@
     return DeviceMotionDispatcher::instance().latestDeviceMotionData();
 }
 
+PassRefPtrWillBeRawPtr<Event> DeviceMotionController::getLastEvent()
+{
+    return DeviceMotionEvent::create(EventTypeNames::devicemotion, DeviceMotionDispatcher::instance().latestDeviceMotionData());
+}
+
 void DeviceMotionController::registerWithDispatcher()
 {
-    DeviceMotionDispatcher::instance().addController(this);
+    DeviceMotionDispatcher::instance().addDeviceMotionController(this);
 }
 
 void DeviceMotionController::unregisterWithDispatcher()
 {
-    DeviceMotionDispatcher::instance().removeController(this);
+    DeviceMotionDispatcher::instance().removeDeviceMotionController(this);
 }
 
-PassRefPtrWillBeRawPtr<Event> DeviceMotionController::lastEvent() const
-{
-    return DeviceMotionEvent::create(EventTypeNames::devicemotion, DeviceMotionDispatcher::instance().latestDeviceMotionData());
-}
-
-bool DeviceMotionController::isNullEvent(Event* event) const
+bool DeviceMotionController::isNullEvent(Event* event)
 {
     DeviceMotionEvent* motionEvent = toDeviceMotionEvent(event);
     return !motionEvent->deviceMotionData()->canProvideEventData();
 }
 
-const AtomicString& DeviceMotionController::eventTypeName() const
+Document* DeviceMotionController::document()
 {
-    return EventTypeNames::devicemotion;
+    return &m_document;
+}
+
+void DeviceMotionController::didAddEventListener(DOMWindow* window, const AtomicString& eventType)
+{
+    if (eventType != EventTypeNames::devicemotion)
+        return;
+
+    if (page() && page()->visibilityState() == PageVisibilityStateVisible)
+        startUpdating();
+
+    m_hasEventListener = true;
+}
+
+void DeviceMotionController::didRemoveEventListener(DOMWindow* window, const AtomicString& eventType)
+{
+    if (eventType != EventTypeNames::devicemotion || window->hasEventListeners(EventTypeNames::devicemotion))
+        return;
+
+    stopUpdating();
+    m_hasEventListener = false;
+}
+
+void DeviceMotionController::didRemoveAllEventListeners(DOMWindow*)
+{
+    stopUpdating();
+    m_hasEventListener = false;
 }
 
 } // namespace WebCore