content/browser/geolocation/geolocation_service_context.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 #ifndef CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_SERVICE_CONTEXT_H_
   6 #define CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_SERVICE_CONTEXT_H_
   7
   8 #include "base/memory/scoped_vector.h"
   9 #include "content/browser/geolocation/geolocation_service_impl.h"
  10
  11 namespace content {
  12
  13 // Provides information to a set of GeolocationServiceImpl instances that are
  14 // associated with a given context. Notably, allows pausing and resuming
  15 // geolocation on these instances.
  16 class GeolocationServiceContext {
  17  public:
  18   GeolocationServiceContext();
  19   virtual ~GeolocationServiceContext();
  20
  21   // Creates a GeolocationServiceImpl that is weakly bound to |request|.
  22   // |update_callback| will be called when services send
  23   // location updates to their clients.
  24   void CreateService(const base::Closure& update_callback,
  25                      mojo::InterfaceRequest<GeolocationService> request);
  26
  27   // Called when a service has a connection error. After this call, it is no
  28   // longer safe to access |service|.
  29   void ServiceHadConnectionError(GeolocationServiceImpl* service);
  30
  31   // Pauses and resumes geolocation. Resuming when nothing is paused is a
  32   // no-op. If a service is added while geolocation is paused, that service
  33   // will not get geolocation updates until geolocation is resumed.
  34   void PauseUpdates();
  35   void ResumeUpdates();
  36
  37   // Returns whether geolocation updates are currently paused.
  38   bool paused() { return paused_; }
  39
  40   // Enables geolocation override. This method can be used to trigger possible
  41   // location-specific behavior in a particular context.
  42   void SetOverride(scoped_ptr<Geoposition> geoposition);
  43
  44   // Disables geolocation override.
  45   void ClearOverride();
  46
  47  private:
  48   ScopedVector<GeolocationServiceImpl> services_;
  49   bool paused_;
  50
  51   scoped_ptr<Geoposition> geoposition_override_;
  52
  53   DISALLOW_COPY_AND_ASSIGN(GeolocationServiceContext);
  54 };
  55
  56 }  // namespace content
  57
  58 #endif  // CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_SERVICE_CONTEXT_H_