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#ifndef GeoNotifier_h
6#define GeoNotifier_h
7
8#include "modules/geolocation/PositionCallback.h"
9#include "modules/geolocation/PositionErrorCallback.h"
10#include "platform/Timer.h"
11#include "platform/heap/Handle.h"
12
13namespace blink {
14
15class Geolocation;
16class Geoposition;
17class PositionError;
18class PositionOptions;
19
20class GeoNotifier : public GarbageCollectedFinalized<GeoNotifier> {
21public:
22    static GeoNotifier* create(Geolocation* geolocation, PositionCallback* positionCallback, PositionErrorCallback* positionErrorCallback, PositionOptions* options)
23    {
24        return new GeoNotifier(geolocation, positionCallback, positionErrorCallback, options);
25    }
26    void trace(Visitor*);
27
28    PositionOptions* options() const { return m_options.get(); };
29
30    // Sets the given error as the fatal error if there isn't one yet.
31    // Starts the timer with an interval of 0.
32    void setFatalError(PositionError*);
33
34    bool useCachedPosition() const { return m_useCachedPosition; }
35
36    // Tells the notifier to use a cached position and starts its timer with
37    // an interval of 0.
38    void setUseCachedPosition();
39
40    void runSuccessCallback(Geoposition*);
41    void runErrorCallback(PositionError*);
42
43    void startTimer();
44    void stopTimer();
45
46    // Runs the error callback if there is a fatal error. Otherwise, if a
47    // cached position must be used, registers itself for receiving one.
48    // Otherwise, the notifier has expired, and its error callback is run.
49    void timerFired(Timer<GeoNotifier>*);
50
51private:
52    GeoNotifier(Geolocation*, PositionCallback*, PositionErrorCallback*, PositionOptions*);
53
54    Member<Geolocation> m_geolocation;
55    Member<PositionCallback> m_successCallback;
56    Member<PositionErrorCallback> m_errorCallback;
57    Member<PositionOptions> m_options;
58    Timer<GeoNotifier> m_timer;
59    Member<PositionError> m_fatalError;
60    bool m_useCachedPosition;
61};
62
63} // namespace blink
64
65#endif // GeoNotifier_h
66