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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  *  * Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  *  * Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #import "WebDeviceOrientationClient.h"
     27 
     28 #import "WebDeviceOrientationInternal.h"
     29 #import "WebDeviceOrientationProvider.h"
     30 #import "WebViewInternal.h"
     31 #import <objc/objc-runtime.h>
     32 
     33 using namespace WebCore;
     34 
     35 WebDeviceOrientationClient::WebDeviceOrientationClient(WebView* webView)
     36     : m_webView(webView)
     37     , m_controller(0)
     38 {
     39 }
     40 
     41 void WebDeviceOrientationClient::setController(DeviceOrientationController* controller)
     42 {
     43     // This is called by the Page constructor before our WebView has the provider set up.
     44     // MemoryCache the controller for later use.
     45     m_controller = controller;
     46 }
     47 
     48 void WebDeviceOrientationClient::startUpdating()
     49 {
     50     [getProvider() startUpdating];
     51 }
     52 
     53 void WebDeviceOrientationClient::stopUpdating()
     54 {
     55     [getProvider() stopUpdating];
     56 }
     57 
     58 DeviceOrientation* WebDeviceOrientationClient::lastOrientation() const
     59 {
     60     return core([getProvider() lastOrientation]);
     61 }
     62 
     63 void WebDeviceOrientationClient::deviceOrientationControllerDestroyed()
     64 {
     65       delete this;
     66 }
     67 
     68 id<WebDeviceOrientationProvider> WebDeviceOrientationClient::getProvider() const
     69 {
     70     if (!m_provider) {
     71         m_provider = [m_webView _deviceOrientationProvider];
     72         if ([m_provider respondsToSelector:@selector(setController:)])
     73             objc_msgSend(m_provider, @selector(setController:), m_controller);
     74     }
     75     return m_provider;
     76 }
     77