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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_GEOLOCATION_GEOLOCATION_DISPATCHER_HOST_H_
#define CHROME_BROWSER_GEOLOCATION_GEOLOCATION_DISPATCHER_HOST_H_
#include <set>
#include "base/basictypes.h"
#include "base/ref_counted.h"
#include "chrome/browser/geolocation/location_arbitrator.h"
#include "ipc/ipc_message.h"
class GeolocationPermissionContext;
class GURL;
class ResourceMessageFilter;
class URLRequestContextGetter;
struct Geoposition;
// GeolocationDispatcherHost is a delegate for Geolocation messages used by
// ResourceMessageFilter.
// It's the complement of GeolocationDispatcher (owned by RenderView).
class GeolocationDispatcherHost
: public base::RefCountedThreadSafe<GeolocationDispatcherHost>,
public GeolocationArbitrator::Delegate {
public:
GeolocationDispatcherHost(
int resource_message_filter_process_id,
GeolocationPermissionContext* geolocation_permission_context);
// Called to possibly handle the incoming IPC message. Returns true if
// handled. Called in the browser process.
bool OnMessageReceived(const IPC::Message& msg, bool* msg_was_ok);
// GeolocationArbitrator::Delegate
virtual void OnLocationUpdate(const Geoposition& position);
private:
friend class base::RefCountedThreadSafe<GeolocationDispatcherHost>;
virtual ~GeolocationDispatcherHost();
void OnRegisterDispatcher(int render_view_id);
void OnUnregisterDispatcher(int render_view_id);
void OnRequestPermission(
int render_view_id, int bridge_id, const GURL& requesting_frame);
void OnCancelPermissionRequest(
int render_view_id, int bridge_id, const GURL& requesting_frame);
void OnStartUpdating(
int render_view_id, int bridge_id, const GURL& requesting_frame,
bool enable_high_accuracy);
void OnStopUpdating(int render_view_id, int bridge_id);
void OnSuspend(int render_view_id, int bridge_id);
void OnResume(int render_view_id, int bridge_id);
// Registers the bridge created in the renderer side. They'll delegate to the
// UI thread if not already in there.
void RegisterDispatcher(int process_id, int render_view_id);
void UnregisterDispatcher(int process_id, int render_view_id);
int resource_message_filter_process_id_;
scoped_refptr<GeolocationPermissionContext> geolocation_permission_context_;
// Iterated when sending location updates to renderer processes. The fan out
// to individual bridge IDs happens renderer side, in order to minimize
// context switches.
// Only used on the IO thread.
std::set<int> geolocation_renderer_ids_;
// Only set whilst we are registered with the arbitrator.
scoped_refptr<GeolocationArbitrator> location_arbitrator_;
DISALLOW_COPY_AND_ASSIGN(GeolocationDispatcherHost);
};
#endif // CHROME_BROWSER_GEOLOCATION_GEOLOCATION_DISPATCHER_HOST_H_
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