1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "config.h"
6 #include "modules/geolocation/GeoNotifier.h"
7
8 #include "modules/geolocation/Geolocation.h"
9 #include "modules/geolocation/PositionError.h"
10 #include "modules/geolocation/PositionOptions.h"
11
12 namespace blink {
13
GeoNotifier(Geolocation * geolocation,PositionCallback * successCallback,PositionErrorCallback * errorCallback,PositionOptions * options)14 GeoNotifier::GeoNotifier(Geolocation* geolocation, PositionCallback* successCallback, PositionErrorCallback* errorCallback, PositionOptions* options)
15 // FIXME : m_geolocation should be removed, it makes circular dependancy.
16 : m_geolocation(geolocation)
17 , m_successCallback(successCallback)
18 , m_errorCallback(errorCallback)
19 , m_options(options)
20 , m_timer(this, &GeoNotifier::timerFired)
21 , m_useCachedPosition(false)
22 {
23 ASSERT(m_geolocation);
24 ASSERT(m_successCallback);
25 ASSERT(m_options);
26 }
27
trace(Visitor * visitor)28 void GeoNotifier::trace(Visitor* visitor)
29 {
30 visitor->trace(m_geolocation);
31 visitor->trace(m_successCallback);
32 visitor->trace(m_errorCallback);
33 visitor->trace(m_options);
34 visitor->trace(m_fatalError);
35 }
36
setFatalError(PositionError * error)37 void GeoNotifier::setFatalError(PositionError* error)
38 {
39 // If a fatal error has already been set, stick with it. This makes sure that
40 // when permission is denied, this is the error reported, as required by the
41 // spec.
42 if (m_fatalError)
43 return;
44
45 m_fatalError = error;
46 // An existing timer may not have a zero timeout.
47 m_timer.stop();
48 m_timer.startOneShot(0, FROM_HERE);
49 }
50
setUseCachedPosition()51 void GeoNotifier::setUseCachedPosition()
52 {
53 m_useCachedPosition = true;
54 m_timer.startOneShot(0, FROM_HERE);
55 }
56
runSuccessCallback(Geoposition * position)57 void GeoNotifier::runSuccessCallback(Geoposition* position)
58 {
59 m_successCallback->handleEvent(position);
60 }
61
runErrorCallback(PositionError * error)62 void GeoNotifier::runErrorCallback(PositionError* error)
63 {
64 if (m_errorCallback)
65 m_errorCallback->handleEvent(error);
66 }
67
startTimer()68 void GeoNotifier::startTimer()
69 {
70 m_timer.startOneShot(m_options->timeout() / 1000.0, FROM_HERE);
71 }
72
stopTimer()73 void GeoNotifier::stopTimer()
74 {
75 m_timer.stop();
76 }
77
timerFired(Timer<GeoNotifier> *)78 void GeoNotifier::timerFired(Timer<GeoNotifier>*)
79 {
80 m_timer.stop();
81
82 // Test for fatal error first. This is required for the case where the LocalFrame is
83 // disconnected and requests are cancelled.
84 if (m_fatalError) {
85 runErrorCallback(m_fatalError.get());
86 // This will cause this notifier to be deleted.
87 m_geolocation->fatalErrorOccurred(this);
88 return;
89 }
90
91 if (m_useCachedPosition) {
92 // Clear the cached position flag in case this is a watch request, which
93 // will continue to run.
94 m_useCachedPosition = false;
95 m_geolocation->requestUsesCachedPosition(this);
96 return;
97 }
98
99 if (m_errorCallback)
100 m_errorCallback->handleEvent(PositionError::create(PositionError::TIMEOUT, "Timeout expired"));
101 m_geolocation->requestTimedOut(this);
102 }
103
104 } // namespace blink
105