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 #include "third_party/mojo/src/mojo/public/cpp/bindings/error_handler.h"
  11
  12 #ifndef CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_SERVICE_IMPL_H_
  13 #define CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_SERVICE_IMPL_H_
  14
  15 namespace content {
  16
  17 class GeolocationProvider;
  18 class GeolocationServiceContext;
  19
  20 // Implements the GeolocationService Mojo interface.
  21 class GeolocationServiceImpl : public GeolocationService,
  22                                public mojo::ErrorHandler {
  23  public:
  24   // |context| must outlive this object. |update_callback| will be called when
  25   // location updates are sent, allowing the client to know when the service
  26   // is being used.
  27   GeolocationServiceImpl(mojo::InterfaceRequest<GeolocationService> request,
  28                          GeolocationServiceContext* context,
  29                          const base::Closure& update_callback);
  30   ~GeolocationServiceImpl() override;
  31
  32   // Starts listening for updates.
  33   void StartListeningForUpdates();
  34
  35   // Pauses and resumes sending updates to the client of this instance.
  36   void PauseUpdates();
  37   void ResumeUpdates();
  38
  39   // Enables and disables geolocation override.
  40   void SetOverride(const Geoposition& position);
  41   void ClearOverride();
  42
  43  private:
  44   typedef mojo::Callback<void(MojoGeopositionPtr)> PositionCallback;
  45
  46   // GeolocationService:
  47   void SetHighAccuracy(bool high_accuracy) override;
  48   void QueryNextPosition(const PositionCallback& callback) override;
  49
  50   // mojo::ErrorHandler:
  51   void OnConnectionError() override;
  52
  53   void OnLocationUpdate(const Geoposition& position);
  54   void ReportCurrentPosition();
  55
  56   // The binding between this object and the other end of the pipe.
  57   mojo::Binding<GeolocationService> binding_;
  58
  59   // Owns this object.
  60   GeolocationServiceContext* context_;
  61   scoped_ptr<GeolocationProvider::Subscription> geolocation_subscription_;
  62
  63   // Callback that allows the instantiator of this class to be notified on
  64   // position updates.
  65   base::Closure update_callback_;
  66
  67   // The callback passed to QueryNextPosition.
  68   PositionCallback position_callback_;
  69
  70   // Valid iff SetOverride() has been called and ClearOverride() has not
  71   // subsequently been called.
  72   Geoposition position_override_;
  73
  74   MojoGeoposition current_position_;
  75
  76   // Whether this instance is currently observing location updates with high
  77   // accuracy.
  78   bool high_accuracy_;
  79
  80   bool has_position_to_report_;
  81
  82   DISALLOW_COPY_AND_ASSIGN(GeolocationServiceImpl);
  83 };
  84
  85 }  // namespace content
  86
  87 #endif  // CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_SERVICE_IMPL_H_