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#include "config.h"
27#include "GeolocationController.h"
28
29#if ENABLE(GEOLOCATION)
30
31#include "GeolocationClient.h"
32#include "GeolocationError.h"
33#include "GeolocationPosition.h"
34
35namespace WebCore {
36
37GeolocationController::GeolocationController(Page& page, GeolocationClient& client)
38 : m_page(page)
39 , m_client(client)
40{
41 m_page.addActivityStateChangeObserver(*this);
42}
43
44GeolocationController::~GeolocationController()
45{
46 ASSERT(m_observers.isEmpty());
47
48 // NOTE: We don't have to remove ourselves from page's ActivityStateChangeObserver set, since
49 // we are supplement of the Page, and our destructor getting called means the page is being
50 // torn down.
51
52 m_client.geolocationDestroyed();
53}
54
55void GeolocationController::addObserver(Geolocation& observer, bool enableHighAccuracy)
56{
57 // This may be called multiple times with the same observer, though removeObserver()
58 // is called only once with each.
59 bool wasEmpty = m_observers.isEmpty();
60 m_observers.add(observer);
61 if (enableHighAccuracy)
62 m_highAccuracyObservers.add(observer);
63
64 if (enableHighAccuracy)
65 m_client.setEnableHighAccuracy(true);
66 if (wasEmpty && m_page.isVisible())
67 m_client.startUpdating();
68}
69
70void GeolocationController::removeObserver(Geolocation& observer)
71{
72 if (!m_observers.contains(observer))
73 return;
74
75 m_observers.remove(observer);
76 m_highAccuracyObservers.remove(observer);
77
78 if (m_observers.isEmpty())
79 m_client.stopUpdating();
80 else if (m_highAccuracyObservers.isEmpty())
81 m_client.setEnableHighAccuracy(false);
82}
83
84void GeolocationController::requestPermission(Geolocation& geolocation)
85{
86 if (!m_page.isVisible()) {
87 m_pendingPermissionRequest.add(geolocation);
88 return;
89 }
90
91 m_client.requestPermission(geolocation);
92}
93
94void GeolocationController::cancelPermissionRequest(Geolocation& geolocation)
95{
96 if (m_pendingPermissionRequest.remove(geolocation))
97 return;
98
99 m_client.cancelPermissionRequest(geolocation);
100}
101
102void GeolocationController::positionChanged(const Optional<GeolocationPosition>& position)
103{
104 m_lastPosition = position;
105 Vector<Ref<Geolocation>> observersVector;
106 observersVector.reserveInitialCapacity(m_observers.size());
107 for (auto& observer : m_observers)
108 observersVector.uncheckedAppend(observer.copyRef());
109 for (auto& observer : observersVector)
110 observer->positionChanged();
111}
112
113void GeolocationController::errorOccurred(GeolocationError& error)
114{
115 Vector<Ref<Geolocation>> observersVector;
116 observersVector.reserveInitialCapacity(m_observers.size());
117 for (auto& observer : m_observers)
118 observersVector.uncheckedAppend(observer.copyRef());
119 for (auto& observer : observersVector)
120 observer->setError(error);
121}
122
123Optional<GeolocationPosition> GeolocationController::lastPosition()
124{
125 if (m_lastPosition)
126 return m_lastPosition.value();
127
128 return m_client.lastPosition();
129}
130
131void GeolocationController::activityStateDidChange(OptionSet<ActivityState::Flag> oldActivityState, OptionSet<ActivityState::Flag> newActivityState)
132{
133 // Toggle GPS based on page visibility to save battery.
134 auto changed = oldActivityState ^ newActivityState;
135 if (changed & ActivityState::IsVisible && !m_observers.isEmpty()) {
136 if (newActivityState & ActivityState::IsVisible)
137 m_client.startUpdating();
138 else
139 m_client.stopUpdating();
140 }
141
142 if (!m_page.isVisible())
143 return;
144
145 auto pendedPermissionRequests = WTFMove(m_pendingPermissionRequest);
146 for (auto& permissionRequest : pendedPermissionRequests)
147 m_client.requestPermission(permissionRequest.get());
148}
149
150const char* GeolocationController::supplementName()
151{
152 return "GeolocationController";
153}
154
155void provideGeolocationTo(Page* page, GeolocationClient& client)
156{
157 ASSERT(page);
158 Supplement<Page>::provideTo(page, GeolocationController::supplementName(), std::make_unique<GeolocationController>(*page, client));
159}
160
161} // namespace WebCore
162
163#endif // ENABLE(GEOLOCATION)
164