diff -r 000000000000 -r 4f2f89ce4247 WebCore/dom/DeviceOrientationController.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/dom/DeviceOrientationController.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2010, The Android Open Source Project
+ *
+ * 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 "DeviceOrientationController.h"
+
+#if ENABLE(DEVICE_ORIENTATION)
+
+#include "DeviceOrientation.h"
+#include "DeviceOrientationClient.h"
+#include "DeviceOrientationEvent.h"
+
+namespace WebCore {
+
+DeviceOrientationController::DeviceOrientationController(Page* page, DeviceOrientationClient* client)
+    : m_page(page)
+    , m_client(client)
+{
+}
+
+void DeviceOrientationController::addListener(DOMWindow* window)
+{
+    // If no client is present, signal that no orientation data is available.
+    // If the client already has an orientation, call back to this new listener
+    // immediately.
+    if (!m_client) {
+        RefPtr<DeviceOrientation> emptyOrientation = DeviceOrientation::create();
+        window->dispatchEvent(DeviceOrientationEvent::create(eventNames().deviceorientationEvent, emptyOrientation.get()));
+    } else if (m_client && m_client->lastOrientation())
+        window->dispatchEvent(DeviceOrientationEvent::create(eventNames().deviceorientationEvent, m_client->lastOrientation()));
+
+    // The client may call back synchronously.
+    bool wasEmpty = m_listeners.isEmpty();
+    m_listeners.add(window);
+    if (wasEmpty && m_client)
+        m_client->startUpdating();
+}
+
+void DeviceOrientationController::removeListener(DOMWindow* window)
+{
+    m_listeners.remove(window);
+    if (m_listeners.isEmpty() && m_client)
+        m_client->stopUpdating();
+}
+
+void DeviceOrientationController::removeAllListeners(DOMWindow* window)
+{
+    // May be called with a DOMWindow that's not a listener.
+    if (!m_listeners.contains(window))
+        return;
+
+    m_listeners.removeAll(window);
+    if (m_listeners.isEmpty() && m_client)
+        m_client->stopUpdating();
+}
+
+void DeviceOrientationController::didChangeDeviceOrientation(DeviceOrientation* orientation)
+{
+    RefPtr<DeviceOrientationEvent> event = DeviceOrientationEvent::create(eventNames().deviceorientationEvent, orientation);
+    Vector<DOMWindow*> listenersVector;
+    copyToVector(m_listeners, listenersVector);
+    for (size_t i = 0; i < listenersVector.size(); ++i)
+        listenersVector[i]->dispatchEvent(event);
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(DEVICE_ORIENTATION)