Home | History | Annotate | Download | only in geolocation 
      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 
     13 namespace blink {
     14 
     15 class Geolocation;
     16 class Geoposition;
     17 class PositionError;
     18 class PositionOptions;
     19 
     20 class GeoNotifier : public GarbageCollectedFinalized<GeoNotifier> {
     21 public:
     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 
     51 private:
     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