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