GeolocationController.cpp revision 2bde8e466a4451c7319e3a072d118917957d6554 
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#include "GeolocationPosition.h"
29
30#if ENABLE(CLIENT_BASED_GEOLOCATION)
31
32#include "GeolocationClient.h"
33
34namespace WebCore {
35
36GeolocationController::GeolocationController(Page* page, GeolocationClient* client)
37    : m_page(page)
38    , m_client(client)
39{
40}
41
42GeolocationController::~GeolocationController()
43{
44    ASSERT(m_observers.isEmpty());
45
46    if (m_client)
47        m_client->geolocationDestroyed();
48}
49
50void GeolocationController::addObserver(Geolocation* observer, bool enableHighAccuracy)
51{
52    // This may be called multiple times with the same observer, though removeObserver()
53    // is called only once with each.
54    bool wasEmpty = m_observers.isEmpty();
55    m_observers.add(observer);
56    if (enableHighAccuracy)
57        m_highAccuracyObservers.add(observer);
58
59    if (m_client) {
60        if (enableHighAccuracy)
61            m_client->setEnableHighAccuracy(true);
62        if (wasEmpty)
63            m_client->startUpdating();
64    }
65}
66
67void GeolocationController::removeObserver(Geolocation* observer)
68{
69    if (!m_observers.contains(observer))
70        return;
71
72    m_observers.remove(observer);
73    m_highAccuracyObservers.remove(observer);
74
75    if (m_client) {
76        if (m_observers.isEmpty())
77            m_client->stopUpdating();
78        else if (m_highAccuracyObservers.isEmpty())
79            m_client->setEnableHighAccuracy(false);
80    }
81}
82
83void GeolocationController::requestPermission(Geolocation* geolocation)
84{
85    if (m_client)
86        m_client->requestPermission(geolocation);
87}
88
89void GeolocationController::cancelPermissionRequest(Geolocation* geolocation)
90{
91    if (m_client)
92        m_client->cancelPermissionRequest(geolocation);
93}
94
95void GeolocationController::positionChanged(GeolocationPosition* position)
96{
97    m_lastPosition = position;
98    Vector<RefPtr<Geolocation> > observersVector;
99    copyToVector(m_observers, observersVector);
100    for (size_t i = 0; i < observersVector.size(); ++i)
101        observersVector[i]->positionChanged();
102}
103
104void GeolocationController::errorOccurred(GeolocationError* error)
105{
106    Vector<RefPtr<Geolocation> > observersVector;
107    copyToVector(m_observers, observersVector);
108    for (size_t i = 0; i < observersVector.size(); ++i)
109        observersVector[i]->setError(error);
110}
111
112GeolocationPosition* GeolocationController::lastPosition()
113{
114    if (m_lastPosition.get())
115        return m_lastPosition.get();
116
117    if (!m_client)
118        return 0;
119
120    return m_client->lastPosition();
121}
122
123} // namespace WebCore
124
125#endif // ENABLE(CLIENT_BASED_GEOLOCATION)
126