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[email protected]a980b052012-04-20 12:42:491// Copyright (c) 2012 The Chromium Authors. All rights reserved.
[email protected]8b96de122010-02-15 15:15:222// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
[email protected]90984b02012-11-30 13:00:405#include "content/browser/geolocation/location_arbitrator_impl.h"
[email protected]8b96de122010-02-15 15:15:226
7#include <map>
8
[email protected]81b14e72011-10-07 21:18:369#include "base/bind.h"
10#include "base/bind_helpers.h"
[email protected]5038bce2013-06-12 03:44:5111#include "content/browser/geolocation/network_location_provider.h"
[email protected]c8c77182011-12-21 15:04:4712#include "content/public/browser/access_token_store.h"
[email protected]b7c5c262012-11-26 13:17:1813#include "content/public/browser/content_browser_client.h"
14#include "content/public/common/content_client.h"
[email protected]707e1c42013-07-09 21:18:5815#include "url/gurl.h"
[email protected]c8c77182011-12-21 15:04:4716
[email protected]6bd40832012-10-29 03:01:4917namespace content {
[email protected]8b96de122010-02-15 15:15:2218namespace {
[email protected]b7d6acc2011-02-03 11:01:5019
[email protected]52daa5d32012-09-12 10:33:4520const char* kDefaultNetworkProviderUrl =
21 "https://www.googleapis.com/geolocation/v1/geolocate";
[email protected]e1d4edb2010-02-17 17:33:5622} // namespace
[email protected]8b96de122010-02-15 15:15:2223
[email protected]0aade3e2010-10-01 16:28:5824// To avoid oscillations, set this to twice the expected update interval of a
25// a GPS-type location provider (in case it misses a beat) plus a little.
[email protected]73d8e1d82013-09-10 20:52:0926const int64 LocationArbitratorImpl::kFixStaleTimeoutMilliseconds =
[email protected]0aade3e2010-10-01 16:28:5827 11 * base::Time::kMillisecondsPerSecond;
28
[email protected]73d8e1d82013-09-10 20:52:0929LocationArbitratorImpl::LocationArbitratorImpl(
[email protected]6d444ddf2013-05-07 17:10:4430 const LocationUpdateCallback& callback)
[email protected]86493cdf2014-08-14 19:47:1731 : arbitrator_update_callback_(callback),
32 provider_update_callback_(
33 base::Bind(&LocationArbitratorImpl::OnLocationUpdate,
[email protected]5038bce2013-06-12 03:44:5134 base::Unretained(this))),
[email protected]a980b052012-04-20 12:42:4935 position_provider_(NULL),
[email protected]a57a16a2013-05-16 00:25:4936 is_permission_granted_(false),
37 is_running_(false) {
[email protected]8b96de122010-02-15 15:15:2238}
39
[email protected]73d8e1d82013-09-10 20:52:0940LocationArbitratorImpl::~LocationArbitratorImpl() {
[email protected]8b96de122010-02-15 15:15:2241}
42
[email protected]73d8e1d82013-09-10 20:52:0943GURL LocationArbitratorImpl::DefaultNetworkProviderURL() {
[email protected]52daa5d32012-09-12 10:33:4544 return GURL(kDefaultNetworkProviderUrl);
45}
46
[email protected]73d8e1d82013-09-10 20:52:0947void LocationArbitratorImpl::OnPermissionGranted() {
[email protected]a980b052012-04-20 12:42:4948 is_permission_granted_ = true;
[email protected]5038bce2013-06-12 03:44:5149 for (ScopedVector<LocationProvider>::iterator i = providers_.begin();
[email protected]a3473d92010-06-11 15:47:2950 i != providers_.end(); ++i) {
[email protected]a980b052012-04-20 12:42:4951 (*i)->OnPermissionGranted();
[email protected]221e54452010-06-01 13:30:0152 }
[email protected]1642c602010-04-01 11:31:0053}
54
[email protected]73d8e1d82013-09-10 20:52:0955void LocationArbitratorImpl::StartProviders(bool use_high_accuracy) {
thiago.santosef0ffb72015-01-21 14:39:2556 // GetAccessTokenStore() will return NULL for embedders not implementing
57 // the AccessTokenStore class, so we report an error to avoid JavaScript
58 // requests of location to wait eternally for a reply.
59 AccessTokenStore* access_token_store = GetAccessTokenStore();
60 if (!access_token_store) {
61 Geoposition position;
62 position.error_code = Geoposition::ERROR_CODE_PERMISSION_DENIED;
63 arbitrator_update_callback_.Run(position);
64 return;
65 }
66
[email protected]60349d92011-09-06 11:00:4167 // Stash options as OnAccessTokenStoresLoaded has not yet been called.
[email protected]a57a16a2013-05-16 00:25:4968 is_running_ = true;
[email protected]6d444ddf2013-05-07 17:10:4469 use_high_accuracy_ = use_high_accuracy;
[email protected]60349d92011-09-06 11:00:4170 if (providers_.empty()) {
[email protected]52daa5d32012-09-12 10:33:4571 DCHECK(DefaultNetworkProviderURL().is_valid());
thiago.santosef0ffb72015-01-21 14:39:2572 access_token_store->LoadAccessTokens(
[email protected]73d8e1d82013-09-10 20:52:0973 base::Bind(&LocationArbitratorImpl::OnAccessTokenStoresLoaded,
[email protected]81b14e72011-10-07 21:18:3674 base::Unretained(this)));
[email protected]60349d92011-09-06 11:00:4175 } else {
76 DoStartProviders();
77 }
[email protected]1642c602010-04-01 11:31:0078}
79
[email protected]73d8e1d82013-09-10 20:52:0980void LocationArbitratorImpl::DoStartProviders() {
[email protected]5038bce2013-06-12 03:44:5181 for (ScopedVector<LocationProvider>::iterator i = providers_.begin();
[email protected]0aade3e2010-10-01 16:28:5882 i != providers_.end(); ++i) {
[email protected]6d444ddf2013-05-07 17:10:4483 (*i)->StartProvider(use_high_accuracy_);
[email protected]8b96de122010-02-15 15:15:2284 }
85}
86
[email protected]73d8e1d82013-09-10 20:52:0987void LocationArbitratorImpl::StopProviders() {
[email protected]b0563922013-06-04 11:02:2288 // Reset the reference location state (provider+position)
89 // so that future starts use fresh locations from
90 // the newly constructed providers.
91 position_provider_ = NULL;
92 position_ = Geoposition();
93
[email protected]3ebea922012-07-19 00:38:5894 providers_.clear();
[email protected]a57a16a2013-05-16 00:25:4995 is_running_ = false;
[email protected]b7d6acc2011-02-03 11:01:5096}
97
[email protected]73d8e1d82013-09-10 20:52:0998void LocationArbitratorImpl::OnAccessTokenStoresLoaded(
[email protected]60349d92011-09-06 11:00:4199 AccessTokenStore::AccessTokenSet access_token_set,
100 net::URLRequestContextGetter* context_getter) {
[email protected]a57a16a2013-05-16 00:25:49101 if (!is_running_ || !providers_.empty()) {
[email protected]60349d92011-09-06 11:00:41102 // A second StartProviders() call may have arrived before the first
103 // completed.
104 return;
105 }
[email protected]221e54452010-06-01 13:30:01106 // If there are no access tokens, boot strap it with the default server URL.
107 if (access_token_set.empty())
[email protected]52daa5d32012-09-12 10:33:45108 access_token_set[DefaultNetworkProviderURL()];
[email protected]221e54452010-06-01 13:30:01109 for (AccessTokenStore::AccessTokenSet::iterator i =
110 access_token_set.begin();
111 i != access_token_set.end(); ++i) {
112 RegisterProvider(
[email protected]b7c5c262012-11-26 13:17:18113 NewNetworkLocationProvider(
114 GetAccessTokenStore(), context_getter,
[email protected]0aade3e2010-10-01 16:28:58115 i->first, i->second));
[email protected]e1d4edb2010-02-17 17:33:56116 }
[email protected]5038bce2013-06-12 03:44:51117
118 LocationProvider* provider =
119 GetContentClient()->browser()->OverrideSystemLocationProvider();
120 if (!provider)
121 provider = NewSystemLocationProvider();
122 RegisterProvider(provider);
[email protected]60349d92011-09-06 11:00:41123 DoStartProviders();
[email protected]e1d4edb2010-02-17 17:33:56124}
125
[email protected]73d8e1d82013-09-10 20:52:09126void LocationArbitratorImpl::RegisterProvider(
[email protected]5038bce2013-06-12 03:44:51127 LocationProvider* provider) {
[email protected]221e54452010-06-01 13:30:01128 if (!provider)
129 return;
[email protected]86493cdf2014-08-14 19:47:17130 provider->SetUpdateCallback(provider_update_callback_);
[email protected]a980b052012-04-20 12:42:49131 if (is_permission_granted_)
132 provider->OnPermissionGranted();
[email protected]3cb676a12012-06-30 15:46:03133 providers_.push_back(provider);
[email protected]221e54452010-06-01 13:30:01134}
135
[email protected]86493cdf2014-08-14 19:47:17136void LocationArbitratorImpl::OnLocationUpdate(const LocationProvider* provider,
137 const Geoposition& new_position) {
[email protected]9fc4dab2012-05-02 20:48:35138 DCHECK(new_position.Validate() ||
[email protected]6bd40832012-10-29 03:01:49139 new_position.error_code != Geoposition::ERROR_CODE_NONE);
[email protected]0aade3e2010-10-01 16:28:58140 if (!IsNewPositionBetter(position_, new_position,
141 provider == position_provider_))
142 return;
143 position_provider_ = provider;
144 position_ = new_position;
[email protected]86493cdf2014-08-14 19:47:17145 arbitrator_update_callback_.Run(position_);
[email protected]8b96de122010-02-15 15:15:22146}
[email protected]e1d4edb2010-02-17 17:33:56147
[email protected]73d8e1d82013-09-10 20:52:09148AccessTokenStore* LocationArbitratorImpl::NewAccessTokenStore() {
[email protected]b7c5c262012-11-26 13:17:18149 return GetContentClient()->browser()->CreateAccessTokenStore();
150}
151
[email protected]73d8e1d82013-09-10 20:52:09152AccessTokenStore* LocationArbitratorImpl::GetAccessTokenStore() {
[email protected]fc72bb12013-06-02 21:13:46153 if (!access_token_store_.get())
[email protected]b7c5c262012-11-26 13:17:18154 access_token_store_ = NewAccessTokenStore();
155 return access_token_store_.get();
156}
157
[email protected]73d8e1d82013-09-10 20:52:09158LocationProvider* LocationArbitratorImpl::NewNetworkLocationProvider(
[email protected]b7c5c262012-11-26 13:17:18159 AccessTokenStore* access_token_store,
160 net::URLRequestContextGetter* context,
161 const GURL& url,
[email protected]fcf75d42013-12-03 20:11:26162 const base::string16& access_token) {
[email protected]b7c5c262012-11-26 13:17:18163#if defined(OS_ANDROID)
164 // Android uses its own SystemLocationProvider.
165 return NULL;
166#else
[email protected]5038bce2013-06-12 03:44:51167 return new NetworkLocationProvider(access_token_store, context, url,
168 access_token);
[email protected]b7c5c262012-11-26 13:17:18169#endif
170}
171
[email protected]73d8e1d82013-09-10 20:52:09172LocationProvider* LocationArbitratorImpl::NewSystemLocationProvider() {
[email protected]49e53742013-10-04 22:01:55173#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX)
[email protected]8b06946e2013-08-12 13:12:41174 return NULL;
175#else
[email protected]b7c5c262012-11-26 13:17:18176 return content::NewSystemLocationProvider();
[email protected]8b06946e2013-08-12 13:12:41177#endif
[email protected]b7c5c262012-11-26 13:17:18178}
179
[email protected]73d8e1d82013-09-10 20:52:09180base::Time LocationArbitratorImpl::GetTimeNow() const {
[email protected]b7c5c262012-11-26 13:17:18181 return base::Time::Now();
182}
183
[email protected]73d8e1d82013-09-10 20:52:09184bool LocationArbitratorImpl::IsNewPositionBetter(
[email protected]221e54452010-06-01 13:30:01185 const Geoposition& old_position, const Geoposition& new_position,
186 bool from_same_provider) const {
187 // Updates location_info if it's better than what we currently have,
188 // or if it's a newer update from the same provider.
[email protected]9fc4dab2012-05-02 20:48:35189 if (!old_position.Validate()) {
[email protected]04d75b6f2010-08-17 11:38:40190 // Older location wasn't locked.
191 return true;
192 }
[email protected]9fc4dab2012-05-02 20:48:35193 if (new_position.Validate()) {
[email protected]221e54452010-06-01 13:30:01194 // New location is locked, let's check if it's any better.
195 if (old_position.accuracy >= new_position.accuracy) {
196 // Accuracy is better.
197 return true;
198 } else if (from_same_provider) {
199 // Same provider, fresher location.
200 return true;
[email protected]b7c5c262012-11-26 13:17:18201 } else if ((GetTimeNow() - old_position.timestamp).InMilliseconds() >
[email protected]221e54452010-06-01 13:30:01202 kFixStaleTimeoutMilliseconds) {
203 // Existing fix is stale.
204 return true;
205 }
206 }
207 return false;
208}
209
[email protected]73d8e1d82013-09-10 20:52:09210bool LocationArbitratorImpl::HasPermissionBeenGranted() const {
[email protected]a980b052012-04-20 12:42:49211 return is_permission_granted_;
[email protected]9e8554822010-02-26 14:29:12212}
213
[email protected]6bd40832012-10-29 03:01:49214} // namespace content