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      1 /*
      2  * Copyright (C) 2010 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     17  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     18  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     20  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     21  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "DeviceOrientationClientProxy.h"
     28 
     29 #include "DeviceOrientation.h"
     30 #include "WebDeviceOrientation.h"
     31 #include "WebDeviceOrientationController.h"
     32 #include <wtf/OwnPtr.h>
     33 #include <wtf/PassRefPtr.h>
     34 #include <wtf/RefPtr.h>
     35 
     36 namespace WebCore {
     37 class DeviceOrientationController;
     38 }
     39 
     40 namespace WebKit {
     41 
     42 void DeviceOrientationClientProxy::setController(WebCore::DeviceOrientationController* c)
     43 {
     44     if (!m_client) // FIXME: Get rid of these null checks once device orientation is enabled by default.
     45         return;
     46     m_client->setController(new WebDeviceOrientationController(c));
     47 }
     48 
     49 void DeviceOrientationClientProxy::startUpdating()
     50 {
     51     if (!m_client)
     52         return;
     53     m_client->startUpdating();
     54 }
     55 
     56 void DeviceOrientationClientProxy::stopUpdating()
     57 {
     58     if (!m_client)
     59         return;
     60     m_client->stopUpdating();
     61 }
     62 
     63 WebCore::DeviceOrientation* DeviceOrientationClientProxy::lastOrientation() const
     64 {
     65     if (!m_client)
     66         return 0;
     67 
     68     // Cache the DeviceOrientation pointer so its reference count does not drop to zero upon return.
     69     m_lastOrientation = m_client->lastOrientation();
     70 
     71     return m_lastOrientation.get();
     72 }
     73 
     74 void DeviceOrientationClientProxy::deviceOrientationControllerDestroyed()
     75 {
     76     // Our lifetime is bound to the WebViewImpl.
     77 }
     78 
     79 } // namespace WebKit
     80