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#if ENABLE(GEOLOCATION)
30
31#include "Geolocation.h"
32#include "Page.h"
33#include "ViewStateChangeObserver.h"
34#include <wtf/HashSet.h>
35#include <wtf/Noncopyable.h>
36#include <wtf/RefPtr.h>
37
38namespace WebCore {
39
40class GeolocationClient;
41class GeolocationError;
42class GeolocationPosition;
43class Page;
44
45class GeolocationController : public Supplement<Page>, private ViewStateChangeObserver {
46    WTF_MAKE_NONCOPYABLE(GeolocationController);
47public:
48    explicit GeolocationController(Page&, GeolocationClient*);
49    ~GeolocationController();
50
51    void addObserver(Geolocation*, bool enableHighAccuracy);
52    void removeObserver(Geolocation*);
53
54    void requestPermission(Geolocation*);
55    void cancelPermissionRequest(Geolocation*);
56
57    void positionChanged(GeolocationPosition*);
58    void errorOccurred(GeolocationError*);
59
60    GeolocationPosition* lastPosition();
61
62    GeolocationClient* client() { return m_client; }
63
64    static const char* supplementName();
65    static GeolocationController* from(Page* page) { return static_cast<GeolocationController*>(Supplement<Page>::from(page, supplementName())); }
66
67private:
68    Page& m_page;
69    GeolocationClient* m_client;
70
71    virtual void viewStateDidChange(ViewState::Flags oldViewState, ViewState::Flags newViewState) override;
72
73    RefPtr<GeolocationPosition> m_lastPosition;
74
75    typedef HashSet<RefPtr<Geolocation>> ObserversSet;
76    // All observers; both those requesting high accuracy and those not.
77    ObserversSet m_observers;
78    ObserversSet m_highAccuracyObservers;
79
80    // While the page is not visible, we pend permission requests.
81    HashSet<RefPtr<Geolocation>> m_pendedPermissionRequest;
82};
83
84} // namespace WebCore
85
86#endif // ENABLE(GEOLOCATION)
87
88#endif // GeolocationController_h
89