1 /* 2 * Copyright (C) 2009 Apple 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 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. 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 APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef GeolocationController_h 27 #define GeolocationController_h 28 29 #include "core/page/Page.h" 30 #include "core/page/PageLifecycleObserver.h" 31 #include "modules/geolocation/Geolocation.h" 32 #include "wtf/HashSet.h" 33 #include "wtf/Noncopyable.h" 34 #include "wtf/RefPtr.h" 35 36 namespace WebCore { 37 38 class GeolocationClient; 39 class GeolocationError; 40 class GeolocationPosition; 41 class Page; 42 43 class GeolocationController : public Supplement<Page>, public PageLifecycleObserver { 44 WTF_MAKE_NONCOPYABLE(GeolocationController); 45 public: 46 ~GeolocationController(); 47 48 static PassOwnPtr<GeolocationController> create(Page*, GeolocationClient*); 49 50 void addObserver(Geolocation*, bool enableHighAccuracy); 51 void removeObserver(Geolocation*); 52 53 void requestPermission(Geolocation*); 54 void cancelPermissionRequest(Geolocation*); 55 56 void positionChanged(GeolocationPosition*); 57 void errorOccurred(GeolocationError*); 58 59 GeolocationPosition* lastPosition(); 60 61 // Inherited from PageLifecycleObserver. 62 virtual void pageVisibilityChanged() OVERRIDE; 63 64 static const char* supplementName(); from(Page * page)65 static GeolocationController* from(Page* page) { return static_cast<GeolocationController*>(Supplement<Page>::from(page, supplementName())); } 66 67 private: 68 GeolocationController(Page*, GeolocationClient*); 69 70 void startUpdatingIfNeeded(); 71 void stopUpdatingIfNeeded(); 72 73 GeolocationClient* m_client; 74 75 RefPtr<GeolocationPosition> m_lastPosition; 76 typedef HashSet<RefPtr<Geolocation> > ObserversSet; 77 // All observers; both those requesting high accuracy and those not. 78 ObserversSet m_observers; 79 ObserversSet m_highAccuracyObservers; 80 bool m_isClientUpdating; 81 }; 82 83 } // namespace WebCore 84 85 #endif // GeolocationController_h 86