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 #include "third_party/mojo/src/mojo/public/cpp/bindings/binding.h"
  10
  11 #ifndef CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_SERVICE_IMPL_H_
  12 #define CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_SERVICE_IMPL_H_
  13
  14 namespace content {
  15
  16 class GeolocationProvider;
  17 class GeolocationServiceContext;
  18
  19 // Implements the GeolocationService Mojo interface.
  20 class GeolocationServiceImpl : public GeolocationService {
  21  public:
  22   // |context| must outlive this object. |update_callback| will be called when
  23   // location updates are sent, allowing the client to know when the service
  24   // is being used.
  25   GeolocationServiceImpl(mojo::InterfaceRequest<GeolocationService> request,
  26                          GeolocationServiceContext* context,
  27                          const base::Closure& update_callback);
  28   ~GeolocationServiceImpl() override;
  29
  30   // Starts listening for updates.
  31   void StartListeningForUpdates();
  32
  33   // Pauses and resumes sending updates to the client of this instance.
  34   void PauseUpdates();
  35   void ResumeUpdates();
  36
  37   // Enables and disables geolocation override.
  38   void SetOverride(const Geoposition& position);
  39   void ClearOverride();
  40
  41  private:
  42   typedef mojo::Callback<void(MojoGeopositionPtr)> PositionCallback;
  43
  44   // GeolocationService:
  45   void SetHighAccuracy(bool high_accuracy) override;
  46   void QueryNextPosition(const PositionCallback& callback) override;
  47
  48   void OnConnectionError();
  49
  50   void OnLocationUpdate(const Geoposition& position);
  51   void ReportCurrentPosition();
  52
  53   // The binding between this object and the other end of the pipe.
  54   mojo::Binding<GeolocationService> binding_;
  55
  56   // Owns this object.
  57   GeolocationServiceContext* context_;
  58   scoped_ptr<GeolocationProvider::Subscription> geolocation_subscription_;
  59
  60   // Callback that allows the instantiator of this class to be notified on
  61   // position updates.
  62   base::Closure update_callback_;
  63
  64   // The callback passed to QueryNextPosition.
  65   PositionCallback position_callback_;
  66
  67   // Valid iff SetOverride() has been called and ClearOverride() has not
  68   // subsequently been called.
  69   Geoposition position_override_;
  70
  71   MojoGeoposition current_position_;
  72
  73   // Whether this instance is currently observing location updates with high
  74   // accuracy.
  75   bool high_accuracy_;
  76
  77   bool has_position_to_report_;
  78
  79   DISALLOW_COPY_AND_ASSIGN(GeolocationServiceImpl);
  80 };
  81
  82 }  // namespace content
  83
  84 #endif  // CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_SERVICE_IMPL_H_