content/browser/geolocation/geolocation_service_impl.h

   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 "base/memory/scoped_ptr.h"
   6 #include "content/browser/geolocation/geolocation_provider_impl.h"
   7 #include "content/common/geolocation_service.mojom.h"
   8 #include "content/public/common/mojo_geoposition.mojom.h"
   9
  10 #ifndef CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_SERVICE_IMPL_H_
  11 #define CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_SERVICE_IMPL_H_
  12
  13 namespace content {
  14
  15 class GeolocationProvider;
  16 class GeolocationServiceContext;
  17
  18 // Implements the GeolocationService Mojo interface.
  19 class GeolocationServiceImpl : public mojo::InterfaceImpl<GeolocationService> {
  20  public:
  21   // |context| must outlive this object. |update_callback| will be called when
  22   // location updates are sent, allowing the client to know when the service
  23   // is being used.
  24   GeolocationServiceImpl(GeolocationServiceContext* context,
  25                          const base::Closure& update_callback);
  26   ~GeolocationServiceImpl() override;
  27
  28   // Starts listening for updates.
  29   void StartListeningForUpdates();
  30
  31   // Pauses and resumes sending updates to the client of this instance.
  32   void PauseUpdates();
  33   void ResumeUpdates();
  34
  35   // Enables and disables geolocation override.
  36   void SetOverride(const Geoposition& position);
  37   void ClearOverride();
  38
  39  private:
  40   typedef mojo::Callback<void(MojoGeopositionPtr)> PositionCallback;
  41
  42   // GeolocationService:
  43   void SetHighAccuracy(bool high_accuracy) override;
  44   void QueryNextPosition(const PositionCallback& callback) override;
  45
  46   // mojo::InterfaceImpl:
  47   void OnConnectionError() override;
  48
  49   void OnLocationUpdate(const Geoposition& position);
  50   void ReportCurrentPosition();
  51
  52   // Owns this object.
  53   GeolocationServiceContext* context_;
  54   scoped_ptr<GeolocationProvider::Subscription> geolocation_subscription_;
  55
  56   // Callback that allows the instantiator of this class to be notified on
  57   // position updates.
  58   base::Closure update_callback_;
  59
  60   // The callback passed to QueryNextPosition.
  61   PositionCallback position_callback_;
  62
  63   // Valid iff SetOverride() has been called and ClearOverride() has not
  64   // subsequently been called.
  65   Geoposition position_override_;
  66
  67   MojoGeoposition current_position_;
  68
  69   // Whether this instance is currently observing location updates with high
  70   // accuracy.
  71   bool high_accuracy_;
  72
  73   bool has_position_to_report_;
  74
  75   DISALLOW_COPY_AND_ASSIGN(GeolocationServiceImpl);
  76 };
  77
  78 }  // namespace content
  79
  80 #endif  // CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_SERVICE_IMPL_H_