| // Copyright (c) 2012 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. |
| |
| #include "components/omnibox/browser/zero_suggest_provider.h" |
| |
| #include <stddef.h> |
| |
| #include <string> |
| #include <utility> |
| |
| #include "base/bind.h" |
| #include "base/callback.h" |
| #include "base/feature_list.h" |
| #include "base/i18n/case_conversion.h" |
| #include "base/json/json_string_value_serializer.h" |
| #include "base/metrics/histogram_macros.h" |
| #include "base/metrics/user_metrics.h" |
| #include "base/strings/string16.h" |
| #include "base/strings/string_util.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "base/time/time.h" |
| #include "base/trace_event/trace_event.h" |
| #include "components/history/core/browser/history_types.h" |
| #include "components/history/core/browser/top_sites.h" |
| #include "components/omnibox/browser/autocomplete_classifier.h" |
| #include "components/omnibox/browser/autocomplete_input.h" |
| #include "components/omnibox/browser/autocomplete_match.h" |
| #include "components/omnibox/browser/autocomplete_match_classification.h" |
| #include "components/omnibox/browser/autocomplete_provider_listener.h" |
| #include "components/omnibox/browser/contextual_suggestions_service.h" |
| #include "components/omnibox/browser/history_url_provider.h" |
| #include "components/omnibox/browser/omnibox_pref_names.h" |
| #include "components/omnibox/browser/search_provider.h" |
| #include "components/omnibox/browser/verbatim_match.h" |
| #include "components/omnibox/common/omnibox_features.h" |
| #include "components/pref_registry/pref_registry_syncable.h" |
| #include "components/prefs/pref_service.h" |
| #include "components/search_engines/search_engine_type.h" |
| #include "components/search_engines/template_url_service.h" |
| #include "components/url_formatter/url_formatter.h" |
| #include "components/variations/net/variations_http_headers.h" |
| #include "net/base/escape.h" |
| #include "services/network/public/cpp/resource_response.h" |
| #include "services/network/public/cpp/shared_url_loader_factory.h" |
| #include "services/network/public/cpp/simple_url_loader.h" |
| #include "third_party/metrics_proto/omnibox_event.pb.h" |
| #include "third_party/metrics_proto/omnibox_input_type.pb.h" |
| #include "url/gurl.h" |
| |
| namespace { |
| |
| // Represents whether ZeroSuggestProvider is allowed to display contextual |
| // suggestions on focus, and if not, why not. |
| // These values are written to logs. New enum values can be added, but existing |
| // enums must never be renumbered or deleted and reused. |
| enum class ZeroSuggestEligibility { |
| ELIGIBLE = 0, |
| // URL_INELIGIBLE would be ELIGIBLE except some property of the current URL |
| // itself prevents ZeroSuggest from triggering. |
| URL_INELIGIBLE = 1, |
| GENERALLY_INELIGIBLE = 2, |
| ELIGIBLE_MAX_VALUE |
| }; |
| |
| // TODO(hfung): The histogram code was copied and modified from |
| // search_provider.cc. Refactor and consolidate the code. |
| // We keep track in a histogram how many suggest requests we send, how |
| // many suggest requests we invalidate (e.g., due to a user typing |
| // another character), and how many replies we receive. |
| // These values are written to logs. New enum values can be added, but existing |
| // enums must never be renumbered or deleted and reused. |
| enum ZeroSuggestRequestsHistogramValue { |
| ZERO_SUGGEST_REQUEST_SENT = 1, |
| ZERO_SUGGEST_REQUEST_INVALIDATED = 2, |
| ZERO_SUGGEST_REPLY_RECEIVED = 3, |
| ZERO_SUGGEST_MAX_REQUEST_HISTOGRAM_VALUE |
| }; |
| |
| void LogOmniboxZeroSuggestRequest( |
| ZeroSuggestRequestsHistogramValue request_value) { |
| UMA_HISTOGRAM_ENUMERATION("Omnibox.ZeroSuggestRequests", request_value, |
| ZERO_SUGGEST_MAX_REQUEST_HISTOGRAM_VALUE); |
| } |
| |
| // Relevance value to use if it was not set explicitly by the server. |
| const int kDefaultZeroSuggestRelevance = 100; |
| |
| // Used for testing whether zero suggest is ever available. |
| constexpr char kArbitraryInsecureUrlString[] = "http://www.google.com/"; |
| |
| // If the user is not signed-in or the user does not have Google set up as their |
| // default search engine, the personalized service is replaced with the most |
| // visited service. |
| bool PersonalizedServiceShouldFallBackToMostVisited( |
| PrefService* prefs, |
| bool is_authenticated, |
| const TemplateURLService* template_url_service) { |
| if (!is_authenticated) |
| return true; |
| |
| if (template_url_service == nullptr) |
| return false; |
| |
| const TemplateURL* default_provider = |
| template_url_service->GetDefaultSearchProvider(); |
| return default_provider == nullptr || |
| default_provider->GetEngineType( |
| template_url_service->search_terms_data()) != SEARCH_ENGINE_GOOGLE; |
| } |
| |
| } // namespace |
| |
| // static |
| ZeroSuggestProvider* ZeroSuggestProvider::Create( |
| AutocompleteProviderClient* client, |
| HistoryURLProvider* history_url_provider, |
| AutocompleteProviderListener* listener) { |
| return new ZeroSuggestProvider(client, history_url_provider, listener); |
| } |
| |
| // static |
| void ZeroSuggestProvider::RegisterProfilePrefs( |
| user_prefs::PrefRegistrySyncable* registry) { |
| registry->RegisterStringPref(omnibox::kZeroSuggestCachedResults, |
| std::string()); |
| } |
| |
| void ZeroSuggestProvider::Start(const AutocompleteInput& input, |
| bool minimal_changes) { |
| TRACE_EVENT0("omnibox", "ZeroSuggestProvider::Start"); |
| matches_.clear(); |
| Stop(true, false); |
| if (!input.from_omnibox_focus() || client()->IsOffTheRecord()) |
| return; |
| |
| // Zero suggest is allowed to run in the Chrome OS app_list context |
| // with invalid (empty) input. |
| if (input.type() == metrics::OmniboxInputType::INVALID && |
| input.current_page_classification() != |
| metrics::OmniboxEventProto::CHROMEOS_APP_LIST) |
| return; |
| |
| result_type_running_ = NONE; |
| set_field_trial_triggered(false); |
| set_field_trial_triggered_in_session(false); |
| permanent_text_ = input.text(); |
| current_query_ = input.current_url().spec(); |
| current_title_ = input.current_title(); |
| current_page_classification_ = input.current_page_classification(); |
| current_url_match_ = MatchForCurrentURL(); |
| |
| GURL suggest_url = ContextualSuggestionsService::ContextualSuggestionsUrl( |
| /*current_url=*/"", input, client()->GetTemplateURLService()); |
| if (!suggest_url.is_valid()) |
| return; |
| |
| result_type_running_ = TypeOfResultToRun(input.current_url(), suggest_url); |
| if (result_type_running_ == NONE) |
| return; |
| |
| done_ = false; |
| |
| MaybeUseCachedSuggestions(); |
| |
| if (result_type_running_ == MOST_VISITED) { |
| most_visited_urls_.clear(); |
| scoped_refptr<history::TopSites> ts = client()->GetTopSites(); |
| if (!ts) { |
| done_ = true; |
| result_type_running_ = NONE; |
| return; |
| } |
| |
| ts->GetMostVisitedURLs(base::BindRepeating( |
| &ZeroSuggestProvider::OnMostVisitedUrlsAvailable, |
| weak_ptr_factory_.GetWeakPtr(), most_visited_request_num_)); |
| return; |
| } |
| |
| const std::string current_url = result_type_running_ == DEFAULT_SERP_FOR_URL |
| ? current_query_ |
| : std::string(); |
| // Create a request for suggestions, routing completion to |
| // OnContextualSuggestionsLoaderAvailable. |
| client() |
| ->GetContextualSuggestionsService(/*create_if_necessary=*/true) |
| ->CreateContextualSuggestionsRequest( |
| current_url, client()->GetCurrentVisitTimestamp(), input, |
| client()->GetTemplateURLService(), |
| base::BindOnce( |
| &ZeroSuggestProvider::OnContextualSuggestionsLoaderAvailable, |
| weak_ptr_factory_.GetWeakPtr()), |
| base::BindOnce( |
| &ZeroSuggestProvider::OnURLLoadComplete, |
| base::Unretained(this) /* this owns SimpleURLLoader */)); |
| } |
| |
| void ZeroSuggestProvider::Stop(bool clear_cached_results, |
| bool due_to_user_inactivity) { |
| if (loader_) |
| LogOmniboxZeroSuggestRequest(ZERO_SUGGEST_REQUEST_INVALIDATED); |
| loader_.reset(); |
| auto* contextual_suggestions_service = |
| client()->GetContextualSuggestionsService(/*create_if_necessary=*/false); |
| // contextual_suggestions_service can be null if in incognito mode. |
| if (contextual_suggestions_service != nullptr) { |
| contextual_suggestions_service->StopCreatingContextualSuggestionsRequest(); |
| } |
| // TODO(krb): It would allow us to remove some guards if we could also cancel |
| // the TopSites::GetMostVisitedURLs request. |
| done_ = true; |
| result_type_running_ = NONE; |
| ++most_visited_request_num_; |
| |
| if (clear_cached_results) { |
| // We do not call Clear() on |results_| to retain |verbatim_relevance| |
| // value in the |results_| object. |verbatim_relevance| is used at the |
| // beginning of the next call to Start() to determine the current url |
| // match relevance. |
| results_.suggest_results.clear(); |
| results_.navigation_results.clear(); |
| current_query_.clear(); |
| current_title_.clear(); |
| most_visited_urls_.clear(); |
| } |
| } |
| |
| void ZeroSuggestProvider::DeleteMatch(const AutocompleteMatch& match) { |
| if (OmniboxFieldTrial::InZeroSuggestPersonalizedFieldTrial( |
| current_page_classification_)) { |
| // Remove the deleted match from the cache, so it is not shown to the user |
| // again. Since we cannot remove just one result, blow away the cache. |
| client()->GetPrefs()->SetString(omnibox::kZeroSuggestCachedResults, |
| std::string()); |
| } |
| BaseSearchProvider::DeleteMatch(match); |
| } |
| |
| void ZeroSuggestProvider::AddProviderInfo(ProvidersInfo* provider_info) const { |
| BaseSearchProvider::AddProviderInfo(provider_info); |
| if (!results_.suggest_results.empty() || |
| !results_.navigation_results.empty() || |
| !most_visited_urls_.empty()) |
| provider_info->back().set_times_returned_results_in_session(1); |
| } |
| |
| void ZeroSuggestProvider::ResetSession() { |
| // The user has started editing in the omnibox, so leave |
| // |field_trial_triggered_in_session| unchanged and set |
| // |field_trial_triggered| to false since zero suggest is inactive now. |
| set_field_trial_triggered(false); |
| } |
| |
| ZeroSuggestProvider::ZeroSuggestProvider( |
| AutocompleteProviderClient* client, |
| HistoryURLProvider* history_url_provider, |
| AutocompleteProviderListener* listener) |
| : BaseSearchProvider(AutocompleteProvider::TYPE_ZERO_SUGGEST, client), |
| history_url_provider_(history_url_provider), |
| listener_(listener), |
| result_type_running_(NONE), |
| weak_ptr_factory_(this) { |
| // Record whether contextual zero suggest is possible for this user / profile. |
| const TemplateURLService* template_url_service = |
| client->GetTemplateURLService(); |
| // Template URL service can be null in tests. |
| if (template_url_service != nullptr) { |
| AutocompleteInput empty_input; |
| GURL suggest_url = ContextualSuggestionsService::ContextualSuggestionsUrl( |
| /*current_url=*/"", /*empty input*/ empty_input, template_url_service); |
| // To check whether this is allowed, use an arbitrary insecure (http) URL |
| // as the URL we'd want suggestions for. The value of OTHER as the current |
| // page classification is to correspond with that URL. |
| UMA_HISTOGRAM_BOOLEAN( |
| "Omnibox.ZeroSuggest.Eligible.OnProfileOpen", |
| suggest_url.is_valid() && |
| CanSendURL(GURL(kArbitraryInsecureUrlString), suggest_url, |
| template_url_service->GetDefaultSearchProvider(), |
| metrics::OmniboxEventProto::OTHER, |
| template_url_service->search_terms_data(), client)); |
| } |
| } |
| |
| ZeroSuggestProvider::~ZeroSuggestProvider() { |
| } |
| |
| const TemplateURL* ZeroSuggestProvider::GetTemplateURL(bool is_keyword) const { |
| // Zero suggest provider should not receive keyword results. |
| DCHECK(!is_keyword); |
| return client()->GetTemplateURLService()->GetDefaultSearchProvider(); |
| } |
| |
| const AutocompleteInput ZeroSuggestProvider::GetInput(bool is_keyword) const { |
| // The callers of this method won't look at the AutocompleteInput's |
| // |from_omnibox_focus| member, so we can set its value to false. |
| AutocompleteInput input(base::string16(), current_page_classification_, |
| client()->GetSchemeClassifier()); |
| input.set_current_url(GURL(current_query_)); |
| input.set_current_title(current_title_); |
| input.set_prevent_inline_autocomplete(true); |
| input.set_allow_exact_keyword_match(false); |
| return input; |
| } |
| |
| bool ZeroSuggestProvider::ShouldAppendExtraParams( |
| const SearchSuggestionParser::SuggestResult& result) const { |
| // We always use the default provider for search, so append the params. |
| return true; |
| } |
| |
| void ZeroSuggestProvider::RecordDeletionResult(bool success) { |
| if (success) { |
| base::RecordAction( |
| base::UserMetricsAction("Omnibox.ZeroSuggestDelete.Success")); |
| } else { |
| base::RecordAction( |
| base::UserMetricsAction("Omnibox.ZeroSuggestDelete.Failure")); |
| } |
| } |
| |
| void ZeroSuggestProvider::OnURLLoadComplete( |
| const network::SimpleURLLoader* source, |
| std::unique_ptr<std::string> response_body) { |
| DCHECK(!done_); |
| DCHECK_EQ(loader_.get(), source); |
| |
| LogOmniboxZeroSuggestRequest(ZERO_SUGGEST_REPLY_RECEIVED); |
| |
| const bool results_updated = |
| response_body && source->NetError() == net::OK && |
| (source->ResponseInfo() && source->ResponseInfo()->headers && |
| source->ResponseInfo()->headers->response_code() == 200) && |
| UpdateResults(SearchSuggestionParser::ExtractJsonData( |
| source, std::move(response_body))); |
| loader_.reset(); |
| done_ = true; |
| result_type_running_ = NONE; |
| ++most_visited_request_num_; |
| listener_->OnProviderUpdate(results_updated); |
| } |
| |
| bool ZeroSuggestProvider::UpdateResults(const std::string& json_data) { |
| std::unique_ptr<base::Value> data( |
| SearchSuggestionParser::DeserializeJsonData(json_data)); |
| if (!data) |
| return false; |
| |
| // When running the personalized service, we want to store suggestion |
| // responses if non-empty. |
| if (result_type_running_ == DEFAULT_SERP && !json_data.empty()) { |
| client()->GetPrefs()->SetString(omnibox::kZeroSuggestCachedResults, |
| json_data); |
| |
| // If we received an empty result list, we should update the display, as it |
| // may be showing cached results that should not be shown. |
| const base::ListValue* root_list = nullptr; |
| const base::ListValue* results_list = nullptr; |
| const bool non_empty_parsed_list = data->GetAsList(&root_list) && |
| root_list->GetList(1, &results_list) && |
| !results_list->empty(); |
| const bool non_empty_cache = !results_.suggest_results.empty() || |
| !results_.navigation_results.empty(); |
| if (non_empty_parsed_list && non_empty_cache) |
| return false; |
| } |
| const bool results_updated = ParseSuggestResults( |
| *data, kDefaultZeroSuggestRelevance, false, &results_); |
| ConvertResultsToAutocompleteMatches(); |
| return results_updated; |
| } |
| |
| void ZeroSuggestProvider::AddSuggestResultsToMap( |
| const SearchSuggestionParser::SuggestResults& results, |
| MatchMap* map) { |
| for (size_t i = 0; i < results.size(); ++i) |
| AddMatchToMap(results[i], std::string(), i, false, false, map); |
| } |
| |
| AutocompleteMatch ZeroSuggestProvider::NavigationToMatch( |
| const SearchSuggestionParser::NavigationResult& navigation) { |
| AutocompleteMatch match(this, navigation.relevance(), false, |
| navigation.type()); |
| match.destination_url = navigation.url(); |
| |
| match.fill_into_edit += |
| AutocompleteInput::FormattedStringWithEquivalentMeaning( |
| navigation.url(), url_formatter::FormatUrl(navigation.url()), |
| client()->GetSchemeClassifier(), nullptr); |
| |
| // Zero suggest results should always omit protocols and never appear bold. |
| auto format_types = AutocompleteMatch::GetFormatTypes(false, false); |
| match.contents = url_formatter::FormatUrl(navigation.url(), format_types, |
| net::UnescapeRule::SPACES, nullptr, |
| nullptr, nullptr); |
| match.contents_class = ClassifyTermMatches({}, match.contents.length(), 0, |
| ACMatchClassification::URL); |
| |
| match.description = |
| AutocompleteMatch::SanitizeString(navigation.description()); |
| match.description_class = ClassifyTermMatches({}, match.description.length(), |
| 0, ACMatchClassification::NONE); |
| |
| match.subtype_identifier = navigation.subtype_identifier(); |
| return match; |
| } |
| |
| void ZeroSuggestProvider::OnMostVisitedUrlsAvailable( |
| size_t orig_request_num, |
| const history::MostVisitedURLList& urls) { |
| if (result_type_running_ != MOST_VISITED || |
| orig_request_num != most_visited_request_num_) { |
| return; |
| } |
| most_visited_urls_ = urls; |
| done_ = true; |
| ConvertResultsToAutocompleteMatches(); |
| result_type_running_ = NONE; |
| ++most_visited_request_num_; |
| listener_->OnProviderUpdate(true); |
| } |
| |
| void ZeroSuggestProvider::OnContextualSuggestionsLoaderAvailable( |
| std::unique_ptr<network::SimpleURLLoader> loader) { |
| // ContextualSuggestionsService has already started |loader|, so here it's |
| // only neccessary to grab its ownership until results come in to |
| // OnURLLoadComplete(). |
| loader_ = std::move(loader); |
| LogOmniboxZeroSuggestRequest(ZERO_SUGGEST_REQUEST_SENT); |
| } |
| |
| void ZeroSuggestProvider::ConvertResultsToAutocompleteMatches() { |
| matches_.clear(); |
| |
| TemplateURLService* template_url_service = client()->GetTemplateURLService(); |
| DCHECK(template_url_service); |
| const TemplateURL* default_provider = |
| template_url_service->GetDefaultSearchProvider(); |
| // Fail if we can't set the clickthrough URL for query suggestions. |
| if (default_provider == nullptr || |
| !default_provider->SupportsReplacement( |
| template_url_service->search_terms_data())) |
| return; |
| |
| MatchMap map; |
| AddSuggestResultsToMap(results_.suggest_results, &map); |
| |
| const int num_query_results = map.size(); |
| const int num_nav_results = results_.navigation_results.size(); |
| const int num_results = num_query_results + num_nav_results; |
| UMA_HISTOGRAM_COUNTS_1M("ZeroSuggest.QueryResults", num_query_results); |
| UMA_HISTOGRAM_COUNTS_1M("ZeroSuggest.URLResults", num_nav_results); |
| UMA_HISTOGRAM_COUNTS_1M("ZeroSuggest.AllResults", num_results); |
| |
| // Show Most Visited results after ZeroSuggest response is received. |
| if (result_type_running_ == MOST_VISITED) { |
| if (!current_url_match_.destination_url.is_valid()) |
| return; |
| matches_.push_back(current_url_match_); |
| int relevance = 600; |
| if (num_results > 0) { |
| UMA_HISTOGRAM_COUNTS_1M( |
| "Omnibox.ZeroSuggest.MostVisitedResultsCounterfactual", |
| most_visited_urls_.size()); |
| } |
| const base::string16 current_query_string16( |
| base::ASCIIToUTF16(current_query_)); |
| for (size_t i = 0; i < most_visited_urls_.size(); i++) { |
| const history::MostVisitedURL& url = most_visited_urls_[i]; |
| SearchSuggestionParser::NavigationResult nav( |
| client()->GetSchemeClassifier(), url.url, |
| AutocompleteMatchType::NAVSUGGEST, 0, url.title, std::string(), false, |
| relevance, true, current_query_string16); |
| matches_.push_back(NavigationToMatch(nav)); |
| --relevance; |
| } |
| return; |
| } |
| |
| if (num_results == 0) |
| return; |
| |
| // Normally |current_url_match_.destination_url| should be valid unless it is |
| // under particular page context. |
| DCHECK(current_page_classification_ == |
| metrics::OmniboxEventProto::CHROMEOS_APP_LIST || |
| current_url_match_.destination_url.is_valid()); |
| if (current_url_match_.destination_url.is_valid()) |
| matches_.push_back(current_url_match_); |
| for (MatchMap::const_iterator it(map.begin()); it != map.end(); ++it) |
| matches_.push_back(it->second); |
| |
| const SearchSuggestionParser::NavigationResults& nav_results( |
| results_.navigation_results); |
| for (auto it = nav_results.begin(); it != nav_results.end(); ++it) { |
| matches_.push_back(NavigationToMatch(*it)); |
| } |
| } |
| |
| AutocompleteMatch ZeroSuggestProvider::MatchForCurrentURL() { |
| // The placeholder suggestion for the current URL has high relevance so |
| // that it is in the first suggestion slot and inline autocompleted. It |
| // gets dropped as soon as the user types something. |
| AutocompleteInput tmp(GetInput(false)); |
| tmp.UpdateText(permanent_text_, base::string16::npos, tmp.parts()); |
| const base::string16 description = |
| (base::FeatureList::IsEnabled(omnibox::kDisplayTitleForCurrentUrl)) |
| ? current_title_ |
| : base::string16(); |
| return VerbatimMatchForURL(client(), tmp, GURL(current_query_), description, |
| history_url_provider_, |
| results_.verbatim_relevance); |
| } |
| |
| bool ZeroSuggestProvider::AllowZeroSuggestSuggestions( |
| const GURL& current_page_url) const { |
| if (IsNTPPage(current_page_classification_) && |
| !base::FeatureList::IsEnabled(omnibox::kZeroSuggestionsOnNTP)) { |
| return false; |
| } |
| |
| // Don't run if in incognito mode. |
| if (client()->IsOffTheRecord()) |
| return false; |
| |
| if (base::FeatureList::IsEnabled( |
| omnibox::kOmniboxPopupShortcutIconsInZeroState)) { |
| return false; |
| } |
| |
| // Only show zero suggest for pages with URLs the user will recognize |
| // if it is not running in ChromeOS app_list context. |
| // This list intentionally does not include items such as ftp: and file: |
| // because (a) these do not work on Android and iOS, where non-contextual |
| // zero suggest is launched and (b) on desktop, where contextual zero suggest |
| // is running, these types of schemes aren't eligible to be sent to the |
| // server to ask for suggestions (and thus in practice we won't display zero |
| // suggest for them). |
| if (current_page_classification_ != |
| metrics::OmniboxEventProto::CHROMEOS_APP_LIST && |
| (!current_page_url.is_valid() || |
| ((current_page_url.scheme() != url::kHttpScheme) && |
| (current_page_url.scheme() != url::kHttpsScheme) && |
| (current_page_url.scheme() != url::kAboutScheme) && |
| (current_page_url.scheme() != |
| client()->GetEmbedderRepresentationOfAboutScheme())))) |
| return false; |
| |
| return true; |
| } |
| |
| void ZeroSuggestProvider::MaybeUseCachedSuggestions() { |
| if (result_type_running_ != DEFAULT_SERP) |
| return; |
| |
| std::string json_data = |
| client()->GetPrefs()->GetString(omnibox::kZeroSuggestCachedResults); |
| if (!json_data.empty()) { |
| std::unique_ptr<base::Value> data( |
| SearchSuggestionParser::DeserializeJsonData(json_data)); |
| if (data && ParseSuggestResults(*data, kDefaultZeroSuggestRelevance, false, |
| &results_)) |
| ConvertResultsToAutocompleteMatches(); |
| } |
| } |
| |
| ZeroSuggestProvider::ResultType ZeroSuggestProvider::TypeOfResultToRun( |
| const GURL& current_url, |
| const GURL& suggest_url) { |
| // Check if the URL can be sent in any suggest request. |
| const TemplateURLService* template_url_service = |
| client()->GetTemplateURLService(); |
| DCHECK(template_url_service); |
| const TemplateURL* default_provider = |
| template_url_service->GetDefaultSearchProvider(); |
| const bool can_send_current_url = CanSendURL( |
| current_url, suggest_url, default_provider, current_page_classification_, |
| template_url_service->search_terms_data(), client()); |
| |
| // Collect metrics on eligibility. |
| GURL arbitrary_insecure_url(kArbitraryInsecureUrlString); |
| ZeroSuggestEligibility eligibility = ZeroSuggestEligibility::ELIGIBLE; |
| if (!can_send_current_url) { |
| const bool can_send_ordinary_url = |
| CanSendURL(arbitrary_insecure_url, suggest_url, default_provider, |
| current_page_classification_, |
| template_url_service->search_terms_data(), client()); |
| eligibility = can_send_ordinary_url |
| ? ZeroSuggestEligibility::URL_INELIGIBLE |
| : ZeroSuggestEligibility::GENERALLY_INELIGIBLE; |
| } |
| UMA_HISTOGRAM_ENUMERATION( |
| "Omnibox.ZeroSuggest.Eligible.OnFocus", static_cast<int>(eligibility), |
| static_cast<int>(ZeroSuggestEligibility::ELIGIBLE_MAX_VALUE)); |
| |
| // Check if zero suggestions are allowed in the current context. |
| if (!AllowZeroSuggestSuggestions(current_url)) |
| return NONE; |
| |
| if (current_page_classification_ == |
| metrics::OmniboxEventProto::CHROMEOS_APP_LIST) { |
| return DEFAULT_SERP; |
| } |
| |
| if (OmniboxFieldTrial::InZeroSuggestPersonalizedFieldTrial( |
| current_page_classification_)) { |
| return PersonalizedServiceShouldFallBackToMostVisited( |
| client()->GetPrefs(), client()->IsAuthenticated(), |
| template_url_service) |
| ? MOST_VISITED |
| : DEFAULT_SERP; |
| } |
| |
| if (OmniboxFieldTrial::InZeroSuggestMostVisitedWithoutSerpFieldTrial( |
| current_page_classification_) && |
| client() |
| ->GetTemplateURLService() |
| ->IsSearchResultsPageFromDefaultSearchProvider(current_url)) { |
| return NONE; |
| } |
| |
| if (OmniboxFieldTrial::InZeroSuggestMostVisitedFieldTrial( |
| current_page_classification_)) { |
| return MOST_VISITED; |
| } |
| |
| return can_send_current_url ? DEFAULT_SERP_FOR_URL : NONE; |
| } |