content/renderer/geolocation_dispatcher.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/renderer/geolocation_dispatcher.h"
   6
   7 #include "content/common/geolocation_messages.h"
   8 #include "content/renderer/render_view_impl.h"
   9 #include "third_party/WebKit/public/platform/WebString.h"
  10 #include "third_party/WebKit/public/web/WebGeolocationPermissionRequest.h"
  11 #include "third_party/WebKit/public/web/WebGeolocationPermissionRequestManager.h"
  12 #include "third_party/WebKit/public/web/WebGeolocationClient.h"
  13 #include "third_party/WebKit/public/web/WebGeolocationPosition.h"
  14 #include "third_party/WebKit/public/web/WebGeolocationError.h"
  15 #include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
  16
  17 using blink::WebGeolocationController;
  18 using blink::WebGeolocationError;
  19 using blink::WebGeolocationPermissionRequest;
  20 using blink::WebGeolocationPermissionRequestManager;
  21 using blink::WebGeolocationPosition;
  22
  23 namespace content {
  24
  25 GeolocationDispatcher::GeolocationDispatcher(RenderViewImpl* render_view)
  26     : RenderViewObserver(render_view),
  27       pending_permissions_(new WebGeolocationPermissionRequestManager()),
  28       enable_high_accuracy_(false),
  29       updating_(false) {
  30 }
  31
  32 GeolocationDispatcher::~GeolocationDispatcher() {}
  33
  34 bool GeolocationDispatcher::OnMessageReceived(const IPC::Message& message) {
  35   bool handled = true;
  36   IPC_BEGIN_MESSAGE_MAP(GeolocationDispatcher, message)
  37     IPC_MESSAGE_HANDLER(GeolocationMsg_PermissionSet, OnPermissionSet)
  38     IPC_MESSAGE_HANDLER(GeolocationMsg_PositionUpdated, OnPositionUpdated)
  39     IPC_MESSAGE_UNHANDLED(handled = false)
  40   IPC_END_MESSAGE_MAP()
  41   return handled;
  42 }
  43
  44 void GeolocationDispatcher::geolocationDestroyed() {
  45   controller_.reset();
  46   DCHECK(!updating_);
  47 }
  48
  49 void GeolocationDispatcher::startUpdating() {
  50   GURL url;
  51   Send(new GeolocationHostMsg_StartUpdating(
  52       routing_id(), url, enable_high_accuracy_));
  53   updating_ = true;
  54 }
  55
  56 void GeolocationDispatcher::stopUpdating() {
  57   Send(new GeolocationHostMsg_StopUpdating(routing_id()));
  58   updating_ = false;
  59 }
  60
  61 void GeolocationDispatcher::setEnableHighAccuracy(bool enable_high_accuracy) {
  62   // GeolocationController calls setEnableHighAccuracy(true) before
  63   // startUpdating in response to the first high-accuracy Geolocation
  64   // subscription. When the last high-accuracy Geolocation unsubscribes
  65   // it calls setEnableHighAccuracy(false) after stopUpdating.
  66   bool has_changed = enable_high_accuracy_ != enable_high_accuracy;
  67   enable_high_accuracy_ = enable_high_accuracy;
  68   // We have a different accuracy requirement. Request browser to update.
  69   if (updating_ && has_changed)
  70     startUpdating();
  71 }
  72
  73 void GeolocationDispatcher::setController(
  74     WebGeolocationController* controller) {
  75   controller_.reset(controller);
  76 }
  77
  78 bool GeolocationDispatcher::lastPosition(WebGeolocationPosition&) {
  79   // The latest position is stored in the browser, not the renderer, so we
  80   // would have to fetch it synchronously to give a good value here.  The
  81   // WebCore::GeolocationController already caches the last position it
  82   // receives, so there is not much benefit to more position caching here.
  83   return false;
  84 }
  85
  86 // TODO(jknotten): Change the messages to use a security origin, so no
  87 // conversion is necessary.
  88 void GeolocationDispatcher::requestPermission(
  89     const WebGeolocationPermissionRequest& permissionRequest) {
  90   int bridge_id = pending_permissions_->add(permissionRequest);
  91   base::string16 origin = permissionRequest.securityOrigin().toString();
  92   Send(new GeolocationHostMsg_RequestPermission(
  93       routing_id(), bridge_id, GURL(origin),
  94       blink::WebUserGestureIndicator::isProcessingUserGesture()));
  95 }
  96
  97 // TODO(jknotten): Change the messages to use a security origin, so no
  98 // conversion is necessary.
  99 void GeolocationDispatcher::cancelPermissionRequest(
 100     const WebGeolocationPermissionRequest& permissionRequest) {
 101   int bridge_id;
 102   if (!pending_permissions_->remove(permissionRequest, bridge_id))
 103     return;
 104   base::string16 origin = permissionRequest.securityOrigin().toString();
 105   Send(new GeolocationHostMsg_CancelPermissionRequest(
 106       routing_id(), bridge_id, GURL(origin)));
 107 }
 108
 109 // Permission for using geolocation has been set.
 110 void GeolocationDispatcher::OnPermissionSet(int bridge_id, bool is_allowed) {
 111   WebGeolocationPermissionRequest permissionRequest;
 112   if (!pending_permissions_->remove(bridge_id, permissionRequest))
 113     return;
 114   permissionRequest.setIsAllowed(is_allowed);
 115 }
 116
 117 // We have an updated geolocation position or error code.
 118 void GeolocationDispatcher::OnPositionUpdated(
 119     const Geoposition& geoposition) {
 120   // It is possible for the browser process to have queued an update message
 121   // before receiving the stop updating message.
 122   if (!updating_)
 123     return;
 124
 125   if (geoposition.Validate()) {
 126     controller_->positionChanged(
 127         WebGeolocationPosition(
 128             geoposition.timestamp.ToDoubleT(),
 129             geoposition.latitude, geoposition.longitude,
 130             geoposition.accuracy,
 131             // Lowest point on land is at approximately -400 meters.
 132             geoposition.altitude > -10000.,
 133             geoposition.altitude,
 134             geoposition.altitude_accuracy >= 0.,
 135             geoposition.altitude_accuracy,
 136             geoposition.heading >= 0. && geoposition.heading <= 360.,
 137             geoposition.heading,
 138             geoposition.speed >= 0.,
 139             geoposition.speed));
 140   } else {
 141     WebGeolocationError::Error code;
 142     switch (geoposition.error_code) {
 143       case Geoposition::ERROR_CODE_PERMISSION_DENIED:
 144         code = WebGeolocationError::ErrorPermissionDenied;
 145         break;
 146       case Geoposition::ERROR_CODE_POSITION_UNAVAILABLE:
 147         code = WebGeolocationError::ErrorPositionUnavailable;
 148         break;
 149       default:
 150         NOTREACHED() << geoposition.error_code;
 151         return;
 152     }
 153     controller_->errorOccurred(
 154         WebGeolocationError(
 155             code, blink::WebString::fromUTF8(geoposition.error_message)));
 156   }
 157 }
 158
 159 }  // namespace content