content/browser/geolocation/geolocation_dispatcher_host.cc

   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 #include "content/browser/geolocation/geolocation_dispatcher_host.h"
   6
   7 #include <utility>
   8
   9 #include "base/bind.h"
  10 #include "base/metrics/histogram.h"
  11 #include "content/browser/frame_host/render_frame_host_impl.h"
  12 #include "content/browser/renderer_host/render_message_filter.h"
  13 #include "content/browser/renderer_host/render_process_host_impl.h"
  14 #include "content/browser/renderer_host/render_view_host_impl.h"
  15 #include "content/browser/web_contents/web_contents_impl.h"
  16 #include "content/public/browser/browser_context.h"
  17 #include "content/public/browser/content_browser_client.h"
  18 #include "content/public/common/geoposition.h"
  19 #include "content/common/geolocation_messages.h"
  20
  21 namespace content {
  22 namespace {
  23
  24 // Geoposition error codes for reporting in UMA.
  25 enum GeopositionErrorCode {
  26   // NOTE: Do not renumber these as that would confuse interpretation of
  27   // previously logged data. When making changes, also update the enum list
  28   // in tools/metrics/histograms/histograms.xml to keep it in sync.
  29
  30   // There was no error.
  31   GEOPOSITION_ERROR_CODE_NONE = 0,
  32
  33   // User denied use of geolocation.
  34   GEOPOSITION_ERROR_CODE_PERMISSION_DENIED = 1,
  35
  36   // Geoposition could not be determined.
  37   GEOPOSITION_ERROR_CODE_POSITION_UNAVAILABLE = 2,
  38
  39   // Timeout.
  40   GEOPOSITION_ERROR_CODE_TIMEOUT = 3,
  41
  42   // NOTE: Add entries only immediately above this line.
  43   GEOPOSITION_ERROR_CODE_COUNT = 4
  44 };
  45
  46 void RecordGeopositionErrorCode(Geoposition::ErrorCode error_code) {
  47   GeopositionErrorCode code = GEOPOSITION_ERROR_CODE_NONE;
  48   switch (error_code) {
  49     case Geoposition::ERROR_CODE_NONE:
  50       code = GEOPOSITION_ERROR_CODE_NONE;
  51       break;
  52     case Geoposition::ERROR_CODE_PERMISSION_DENIED:
  53       code = GEOPOSITION_ERROR_CODE_PERMISSION_DENIED;
  54       break;
  55     case Geoposition::ERROR_CODE_POSITION_UNAVAILABLE:
  56       code = GEOPOSITION_ERROR_CODE_POSITION_UNAVAILABLE;
  57       break;
  58     case Geoposition::ERROR_CODE_TIMEOUT:
  59       code = GEOPOSITION_ERROR_CODE_TIMEOUT;
  60       break;
  61   }
  62   UMA_HISTOGRAM_ENUMERATION("Geolocation.LocationUpdate.ErrorCode",
  63                             code,
  64                             GEOPOSITION_ERROR_CODE_COUNT);
  65 }
  66
  67 }  // namespace
  68
  69 GeolocationDispatcherHost::PendingPermission::PendingPermission(
  70     int render_frame_id,
  71     int render_process_id,
  72     int bridge_id)
  73     : render_frame_id(render_frame_id),
  74       render_process_id(render_process_id),
  75       bridge_id(bridge_id) {
  76 }
  77
  78 GeolocationDispatcherHost::PendingPermission::~PendingPermission() {
  79 }
  80
  81 GeolocationDispatcherHost::GeolocationDispatcherHost(
  82     WebContents* web_contents)
  83     : WebContentsObserver(web_contents),
  84       paused_(false),
  85       weak_factory_(this) {
  86   // This is initialized by WebContentsImpl. Do not add any non-trivial
  87   // initialization here, defer to OnStartUpdating which is triggered whenever
  88   // a javascript geolocation object is actually initialized.
  89 }
  90
  91 GeolocationDispatcherHost::~GeolocationDispatcherHost() {
  92 }
  93
  94 void GeolocationDispatcherHost::RenderFrameDeleted(
  95     RenderFrameHost* render_frame_host) {
  96   OnStopUpdating(render_frame_host);
  97 }
  98
  99 void GeolocationDispatcherHost::RenderViewHostChanged(
 100     RenderViewHost* old_host,
 101     RenderViewHost* new_host) {
 102   updating_frames_.clear();
 103   paused_ = false;
 104   geolocation_subscription_.reset();
 105 }
 106
 107 bool GeolocationDispatcherHost::OnMessageReceived(
 108     const IPC::Message& msg, RenderFrameHost* render_frame_host) {
 109   bool handled = true;
 110   IPC_BEGIN_MESSAGE_MAP_WITH_PARAM(GeolocationDispatcherHost, msg,
 111                                    render_frame_host)
 112     IPC_MESSAGE_HANDLER(GeolocationHostMsg_RequestPermission,
 113                         OnRequestPermission)
 114     IPC_MESSAGE_HANDLER(GeolocationHostMsg_CancelPermissionRequest,
 115                         OnCancelPermissionRequest)
 116     IPC_MESSAGE_HANDLER(GeolocationHostMsg_StartUpdating, OnStartUpdating)
 117     IPC_MESSAGE_HANDLER(GeolocationHostMsg_StopUpdating, OnStopUpdating)
 118     IPC_MESSAGE_UNHANDLED(handled = false)
 119   IPC_END_MESSAGE_MAP()
 120   return handled;
 121 }
 122
 123 void GeolocationDispatcherHost::OnLocationUpdate(
 124     const Geoposition& geoposition) {
 125   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 126
 127   RecordGeopositionErrorCode(geoposition.error_code);
 128   if (paused_)
 129     return;
 130
 131   for (std::map<RenderFrameHost*, bool>::iterator i = updating_frames_.begin();
 132        i != updating_frames_.end(); ++i) {
 133     RenderFrameHost* top_frame = i->first;
 134     while (top_frame->GetParent()) {
 135       top_frame = top_frame->GetParent();
 136     }
 137     GetContentClient()->browser()->DidUseGeolocationPermission(
 138         web_contents(),
 139         i->first->GetLastCommittedURL().GetOrigin(),
 140         top_frame->GetLastCommittedURL().GetOrigin());
 141
 142     i->first->Send(new GeolocationMsg_PositionUpdated(
 143         i->first->GetRoutingID(), geoposition));
 144   }
 145 }
 146
 147 void GeolocationDispatcherHost::OnRequestPermission(
 148     RenderFrameHost* render_frame_host,
 149     int bridge_id,
 150     const GURL& requesting_frame,
 151     bool user_gesture) {
 152   int render_process_id = render_frame_host->GetProcess()->GetID();
 153   int render_frame_id = render_frame_host->GetRoutingID();
 154
 155   PendingPermission pending_permission(
 156       render_frame_id, render_process_id, bridge_id);
 157   pending_permissions_.push_back(pending_permission);
 158
 159   GetContentClient()->browser()->RequestGeolocationPermission(
 160       web_contents(),
 161       bridge_id,
 162       requesting_frame,
 163       user_gesture,
 164       base::Bind(&GeolocationDispatcherHost::SendGeolocationPermissionResponse,
 165                  weak_factory_.GetWeakPtr(),
 166                  render_process_id, render_frame_id, bridge_id),
 167       &pending_permissions_.back().cancel);
 168 }
 169
 170 void GeolocationDispatcherHost::OnCancelPermissionRequest(
 171     RenderFrameHost* render_frame_host,
 172     int bridge_id,
 173     const GURL& requesting_frame) {
 174   int render_process_id = render_frame_host->GetProcess()->GetID();
 175   int render_frame_id = render_frame_host->GetRoutingID();
 176   for (size_t i = 0; i < pending_permissions_.size(); ++i) {
 177     if (pending_permissions_[i].render_process_id == render_process_id &&
 178         pending_permissions_[i].render_frame_id == render_frame_id &&
 179         pending_permissions_[i].bridge_id == bridge_id) {
 180       if (!pending_permissions_[i].cancel.is_null())
 181         pending_permissions_[i].cancel.Run();
 182       pending_permissions_.erase(pending_permissions_.begin() + i);
 183       return;
 184     }
 185   }
 186 }
 187
 188 void GeolocationDispatcherHost::OnStartUpdating(
 189     RenderFrameHost* render_frame_host,
 190     const GURL& requesting_frame,
 191     bool enable_high_accuracy) {
 192   // StartUpdating() can be invoked as a result of high-accuracy mode
 193   // being enabled / disabled. No need to record the dispatcher again.
 194   UMA_HISTOGRAM_BOOLEAN(
 195       "Geolocation.GeolocationDispatcherHostImpl.EnableHighAccuracy",
 196       enable_high_accuracy);
 197
 198   updating_frames_[render_frame_host] = enable_high_accuracy;
 199   RefreshGeolocationOptions();
 200 }
 201
 202 void GeolocationDispatcherHost::OnStopUpdating(
 203     RenderFrameHost* render_frame_host) {
 204   updating_frames_.erase(render_frame_host);
 205   RefreshGeolocationOptions();
 206 }
 207
 208 void GeolocationDispatcherHost::PauseOrResume(bool should_pause) {
 209   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 210   paused_ = should_pause;
 211   RefreshGeolocationOptions();
 212 }
 213
 214 void GeolocationDispatcherHost::RefreshGeolocationOptions() {
 215   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 216
 217   if (updating_frames_.empty() || paused_) {
 218     geolocation_subscription_.reset();
 219     return;
 220   }
 221
 222   bool high_accuracy = false;
 223   for (std::map<RenderFrameHost*, bool>::iterator i =
 224             updating_frames_.begin(); i != updating_frames_.end(); ++i) {
 225     if (i->second) {
 226       high_accuracy = true;
 227       break;
 228     }
 229   }
 230   geolocation_subscription_ = GeolocationProvider::GetInstance()->
 231       AddLocationUpdateCallback(
 232           base::Bind(&GeolocationDispatcherHost::OnLocationUpdate,
 233                       base::Unretained(this)),
 234           high_accuracy);
 235 }
 236
 237 void GeolocationDispatcherHost::SendGeolocationPermissionResponse(
 238     int render_process_id,
 239     int render_frame_id,
 240     int bridge_id,
 241     bool allowed) {
 242   for (size_t i = 0; i < pending_permissions_.size(); ++i) {
 243     if (pending_permissions_[i].render_process_id == render_process_id &&
 244         pending_permissions_[i].render_frame_id == render_frame_id &&
 245         pending_permissions_[i].bridge_id == bridge_id) {
 246       RenderFrameHost* render_frame_host =
 247           RenderFrameHost::FromID(render_process_id, render_frame_id);
 248       if (render_frame_host) {
 249         render_frame_host->Send(new GeolocationMsg_PermissionSet(
 250             render_frame_id, bridge_id, allowed));
 251       }
 252
 253       if (allowed) {
 254         GeolocationProviderImpl::GetInstance()->
 255             UserDidOptIntoLocationServices();
 256       }
 257
 258       pending_permissions_.erase(pending_permissions_.begin() + i);
 259       return;
 260     }
 261   }
 262
 263   NOTREACHED();
 264 }
 265
 266 }  // namespace content