content/browser/geolocation/geolocation_dispatcher_host.h

   1 // Copyright (c) 2012 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_DISPATCHER_HOST_H_
   6 #define CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_DISPATCHER_HOST_H_
   7
   8 #include <map>
   9 #include <vector>
  10
  11 #include "base/callback_forward.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "content/browser/geolocation/geolocation_provider_impl.h"
  14 #include "content/public/browser/web_contents_observer.h"
  15
  16 class GURL;
  17
  18 namespace content {
  19
  20 // GeolocationDispatcherHost is an observer for Geolocation messages.
  21 // It's the complement of GeolocationDispatcher (owned by RenderView).
  22 class GeolocationDispatcherHost : public WebContentsObserver {
  23  public:
  24   explicit GeolocationDispatcherHost(WebContents* web_contents);
  25   virtual ~GeolocationDispatcherHost();
  26
  27   // Pause or resumes geolocation. Resuming when nothing is paused is a no-op.
  28   // If the web contents is paused while not currently using geolocation but
  29   // then goes on to do so before being resumed, then it will not get
  30   // geolocation updates until it is resumed.
  31   void PauseOrResume(bool should_pause);
  32
  33  private:
  34   // WebContentsObserver
  35   virtual void RenderFrameDeleted(RenderFrameHost* render_frame_host) OVERRIDE;
  36   virtual void RenderViewHostChanged(RenderViewHost* old_host,
  37                                      RenderViewHost* new_host) OVERRIDE;
  38   virtual bool OnMessageReceived(
  39       const IPC::Message& msg, RenderFrameHost* render_frame_host) OVERRIDE;
  40
  41   // Message handlers:
  42   void OnRequestPermission(RenderFrameHost* render_frame_host,
  43                            int bridge_id,
  44                            const GURL& requesting_frame,
  45                            bool user_gesture);
  46   void OnCancelPermissionRequest(RenderFrameHost* render_frame_host,
  47                                  int bridge_id,
  48                                  const GURL& requesting_frame);
  49   void OnStartUpdating(RenderFrameHost* render_frame_host,
  50                        const GURL& requesting_frame,
  51                        bool enable_high_accuracy);
  52   void OnStopUpdating(RenderFrameHost* render_frame_host);
  53
  54   // Updates the geolocation provider with the currently required update
  55   // options.
  56   void RefreshGeolocationOptions();
  57
  58   void OnLocationUpdate(const Geoposition& position);
  59
  60   void SendGeolocationPermissionResponse(int render_process_id,
  61                                          int render_frame_id,
  62                                          int bridge_id,
  63                                          bool allowed);
  64
  65   // A map from the RenderFrameHosts that have requested geolocation updates to
  66   // the type of accuracy they requested (true = high accuracy).
  67   std::map<RenderFrameHost*, bool> updating_frames_;
  68   bool paused_;
  69
  70   struct PendingPermission {
  71     PendingPermission(int render_frame_id,
  72                       int render_process_id,
  73                       int bridge_id);
  74     ~PendingPermission();
  75     int render_frame_id;
  76     int render_process_id;
  77     int bridge_id;
  78     base::Closure cancel;
  79   };
  80   std::vector<PendingPermission> pending_permissions_;
  81
  82   scoped_ptr<GeolocationProvider::Subscription> geolocation_subscription_;
  83
  84   base::WeakPtrFactory<GeolocationDispatcherHost> weak_factory_;
  85
  86   DISALLOW_COPY_AND_ASSIGN(GeolocationDispatcherHost);
  87 };
  88
  89 }  // namespace content
  90
  91 #endif  // CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_DISPATCHER_HOST_H_