1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/optimization_guide/chrome_hints_manager.h"
#include "base/memory/scoped_refptr.h"
#include "build/build_config.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/navigation_predictor/navigation_predictor_keyed_service.h"
#include "chrome/browser/navigation_predictor/navigation_predictor_keyed_service_factory.h"
#include "chrome/browser/optimization_guide/optimization_guide_keyed_service.h"
#include "chrome/browser/optimization_guide/optimization_guide_web_contents_observer.h"
#include "chrome/browser/profiles/profile.h"
#include "components/google/core/common/google_util.h"
#include "components/optimization_guide/core/hint_cache.h"
#include "components/optimization_guide/core/optimization_guide_features.h"
#include "components/optimization_guide/core/push_notification_manager.h"
#include "components/signin/public/identity_manager/identity_manager.h"
#include "content/public/browser/browser_thread.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
namespace {
// Returns true if we can make a request for hints for |prediction|.
bool IsAllowedToFetchForNavigationPrediction(
const absl::optional<NavigationPredictorKeyedService::Prediction>
prediction) {
DCHECK(prediction);
if (prediction->prediction_source() !=
NavigationPredictorKeyedService::PredictionSource::
kAnchorElementsParsedFromWebPage) {
// We only support predictions from page anchors.
return false;
}
const absl::optional<GURL> source_document_url =
prediction->source_document_url();
if (!source_document_url || source_document_url->is_empty())
return false;
// We only extract next predicted navigations from Google SRP URLs.
return google_util::IsGoogleSearchUrl(*source_document_url);
}
} // namespace
namespace optimization_guide {
ChromeHintsManager::ChromeHintsManager(
Profile* profile,
PrefService* pref_service,
base::WeakPtr<optimization_guide::OptimizationGuideStore> hint_store,
optimization_guide::TopHostProvider* top_host_provider,
optimization_guide::TabUrlProvider* tab_url_provider,
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory,
std::unique_ptr<optimization_guide::PushNotificationManager>
push_notification_manager,
signin::IdentityManager* identity_manager,
OptimizationGuideLogger* optimization_guide_logger)
: HintsManager(profile->IsOffTheRecord(),
g_browser_process->GetApplicationLocale(),
pref_service,
hint_store,
top_host_provider,
tab_url_provider,
url_loader_factory,
std::move(push_notification_manager),
identity_manager,
optimization_guide_logger),
profile_(profile) {
if (!optimization_guide::features::IsSRPFetchingEnabled()) {
return;
}
NavigationPredictorKeyedService* navigation_predictor_service =
NavigationPredictorKeyedServiceFactory::GetForProfile(profile);
if (navigation_predictor_service)
navigation_predictor_service->AddObserver(this);
}
ChromeHintsManager::~ChromeHintsManager() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
}
void ChromeHintsManager::Shutdown() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
HintsManager::Shutdown();
NavigationPredictorKeyedService* navigation_predictor_service =
NavigationPredictorKeyedServiceFactory::GetForProfile(profile_);
if (navigation_predictor_service)
navigation_predictor_service->RemoveObserver(this);
}
void ChromeHintsManager::OnPredictionUpdated(
const absl::optional<NavigationPredictorKeyedService::Prediction>
prediction) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
DCHECK(prediction);
if (!IsAllowedToFetchForNavigationPrediction(prediction))
return;
// Per comments in NavigationPredictorKeyedService::Prediction, this pointer
// should be valid while OnPredictionUpdated is on the call stack.
content::WebContents* web_contents = prediction->web_contents();
CHECK(web_contents);
auto* observer =
OptimizationGuideWebContentsObserver::FromWebContents(web_contents);
if (!observer) {
return;
}
std::vector<GURL> urls_to_fetch;
for (const auto& url : prediction->sorted_predicted_urls()) {
if (!IsAllowedToFetchNavigationHints(url))
continue;
// Don't prefetch hints for SRP links that point back to Google.
if (google_util::IsGoogleSearchUrl(url))
continue;
if (hint_cache()->HasURLKeyedEntryForURL(url))
continue;
urls_to_fetch.push_back(url);
}
observer->AddURLsToBatchFetchBasedOnPrediction(std::move(urls_to_fetch),
web_contents);
}
} // namespace optimization_guide
|
