src/athena/extensions/shell/url_search_provider.cc

   1 // Copyright 2014 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 "athena/extensions/shell/url_search_provider.h"
   6
   7 #include "athena/activity/public/activity.h"
   8 #include "athena/activity/public/activity_factory.h"
   9 #include "athena/extensions/shell/athena_shell_scheme_classifier.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "base/values.h"
  12 #include "components/metrics/proto/omnibox_event.pb.h"
  13 #include "components/metrics/proto/omnibox_input_type.pb.h"
  14 #include "components/omnibox/autocomplete_input.h"
  15 #include "components/omnibox/autocomplete_provider_client.h"
  16 #include "components/omnibox/search_provider.h"
  17 #include "components/search_engines/search_terms_data.h"
  18 #include "components/search_engines/template_url_service.h"
  19 #include "components/search_engines/template_url_service_client.h"
  20 #include "content/public/browser/browser_context.h"
  21 #include "ui/app_list/search_result.h"
  22 #include "ui/base/resource/resource_bundle.h"
  23 #include "url/gurl.h"
  24
  25 namespace athena {
  26
  27 namespace {
  28
  29 // This constant was copied from HistoryURLProvider.
  30 // TODO(hashimoto): Componentize HistoryURLProvider and delete this.
  31 const int kScoreForWhatYouTypedResult = 1203;
  32
  33 // The SearchTermsData implementation for Athena.
  34 class AthenaSearchTermsData : public SearchTermsData {
  35  public:
  36   // SearchTermsData:
  37   virtual std::string GetSuggestClient() const override { return "chrome"; }
  38 };
  39
  40 // The templateURLServiceClient for Athena. Mainly for the interaction with
  41 // history module (see chrome/browser/search_engines for Chrome implementation).
  42 // TODO(mukai): Implement the contents of this class when it's necessary.
  43 class AthenaTemplateURLServiceClient : public TemplateURLServiceClient {
  44  public:
  45   AthenaTemplateURLServiceClient() {}
  46   ~AthenaTemplateURLServiceClient() override {}
  47
  48  private:
  49   // TemplateURLServiceClient:
  50   void Shutdown() override {}
  51   void SetOwner(TemplateURLService* owner) override {}
  52   void DeleteAllSearchTermsForKeyword(TemplateURLID id) override {}
  53   void SetKeywordSearchTermsForURL(const GURL& url,
  54                                    TemplateURLID id,
  55                                    const base::string16& term) override {}
  56   void AddKeywordGeneratedVisit(const GURL& url) override {}
  57   void RestoreExtensionInfoIfNecessary(TemplateURL* template_url) override {}
  58
  59   DISALLOW_COPY_AND_ASSIGN(AthenaTemplateURLServiceClient);
  60 };
  61
  62 // The AutocompleteProviderClient for Athena.
  63 class AthenaAutocompleteProviderClient : public AutocompleteProviderClient {
  64  public:
  65   explicit AthenaAutocompleteProviderClient(
  66       content::BrowserContext* browser_context)
  67       : browser_context_(browser_context) {}
  68   ~AthenaAutocompleteProviderClient() override {}
  69
  70   net::URLRequestContextGetter* RequestContext() override {
  71     return browser_context_->GetRequestContext();
  72   }
  73   bool IsOffTheRecord() override { return browser_context_->IsOffTheRecord(); }
  74   std::string AcceptLanguages() override {
  75     // TODO(hashimoto): Return the value stored in the prefs.
  76     return "en-US";
  77   }
  78   bool SearchSuggestEnabled() override { return true; }
  79   bool ShowBookmarkBar() override { return false; }
  80   const AutocompleteSchemeClassifier& SchemeClassifier() override {
  81     return scheme_classifier_;
  82   }
  83   void Classify(
  84       const base::string16& text,
  85       bool prefer_keyword,
  86       bool allow_exact_keyword_match,
  87       metrics::OmniboxEventProto::PageClassification page_classification,
  88       AutocompleteMatch* match,
  89       GURL* alternate_nav_url) override {}
  90   history::URLDatabase* InMemoryDatabase() override { return nullptr; }
  91   void DeleteMatchingURLsForKeywordFromHistory(
  92       history::KeywordID keyword_id,
  93       const base::string16& term) override {}
  94   bool TabSyncEnabledAndUnencrypted() override { return false; }
  95   void PrefetchImage(const GURL& url) override {}
  96
  97  private:
  98   content::BrowserContext* browser_context_;
  99   AthenaShellSchemeClassifier scheme_classifier_;
 100
 101   DISALLOW_COPY_AND_ASSIGN(AthenaAutocompleteProviderClient);
 102 };
 103
 104 int ACMatchStyleToTagStyle(int styles) {
 105   int tag_styles = 0;
 106   if (styles & ACMatchClassification::URL)
 107     tag_styles |= app_list::SearchResult::Tag::URL;
 108   if (styles & ACMatchClassification::MATCH)
 109     tag_styles |= app_list::SearchResult::Tag::MATCH;
 110   if (styles & ACMatchClassification::DIM)
 111     tag_styles |= app_list::SearchResult::Tag::DIM;
 112
 113   return tag_styles;
 114 }
 115
 116 // Translates ACMatchClassifications into SearchResult tags.
 117 void ACMatchClassificationsToTags(const base::string16& text,
 118                                   const ACMatchClassifications& text_classes,
 119                                   app_list::SearchResult::Tags* tags) {
 120   int tag_styles = app_list::SearchResult::Tag::NONE;
 121   size_t tag_start = 0;
 122
 123   for (size_t i = 0; i < text_classes.size(); ++i) {
 124     const ACMatchClassification& text_class = text_classes[i];
 125
 126     // Closes current tag.
 127     if (tag_styles != app_list::SearchResult::Tag::NONE) {
 128       tags->push_back(app_list::SearchResult::Tag(
 129           tag_styles, tag_start, text_class.offset));
 130       tag_styles = app_list::SearchResult::Tag::NONE;
 131     }
 132
 133     if (text_class.style == ACMatchClassification::NONE)
 134       continue;
 135
 136     tag_start = text_class.offset;
 137     tag_styles = ACMatchStyleToTagStyle(text_class.style);
 138   }
 139
 140   if (tag_styles != app_list::SearchResult::Tag::NONE) {
 141     tags->push_back(
 142         app_list::SearchResult::Tag(tag_styles, tag_start, text.length()));
 143   }
 144 }
 145
 146 class UrlSearchResult : public app_list::SearchResult {
 147  public:
 148   UrlSearchResult(content::BrowserContext* browser_context,
 149                   const AutocompleteMatch& match)
 150       : browser_context_(browser_context), match_(match) {
 151     set_id(match_.destination_url.spec());
 152
 153     // Derive relevance from omnibox relevance and normalize it to [0, 1].
 154     // The magic number 1500 is the highest score of an omnibox result.
 155     // See comments in autocomplete_provider.h.
 156     set_relevance(match_.relevance / 1500.0);
 157
 158     UpdateIcon();
 159     UpdateTitleAndDetails();
 160   }
 161
 162   ~UrlSearchResult() override {}
 163
 164  private:
 165   // Overridden from app_list::SearchResult:
 166   scoped_ptr<app_list::SearchResult> Duplicate() override {
 167     return make_scoped_ptr(new UrlSearchResult(browser_context_, match_));
 168   }
 169
 170   void Open(int event_flags) override {
 171     Activity* activity = ActivityFactory::Get()->CreateWebActivity(
 172         browser_context_, base::string16(), match_.destination_url);
 173     Activity::Show(activity);
 174   }
 175
 176   void UpdateIcon() {
 177     SetIcon(*ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
 178         AutocompleteMatch::TypeToIcon(match_.type)));
 179   }
 180
 181   void UpdateTitleAndDetails() {
 182     set_title(match_.contents);
 183     SearchResult::Tags title_tags;
 184     ACMatchClassificationsToTags(
 185         match_.contents, match_.contents_class, &title_tags);
 186     set_title_tags(title_tags);
 187
 188     set_details(match_.description);
 189     SearchResult::Tags details_tags;
 190     ACMatchClassificationsToTags(
 191         match_.description, match_.description_class, &details_tags);
 192     set_details_tags(details_tags);
 193   }
 194
 195   content::BrowserContext* browser_context_;
 196   AutocompleteMatch match_;
 197
 198   DISALLOW_COPY_AND_ASSIGN(UrlSearchResult);
 199 };
 200
 201 }  // namespace
 202
 203 UrlSearchProvider::UrlSearchProvider(content::BrowserContext* browser_context)
 204     : browser_context_(browser_context),
 205       // TODO(mukai): introduce the real parameters when it's necessary.
 206       template_url_service_(new TemplateURLService(
 207           nullptr /* prefs */,
 208           scoped_ptr<SearchTermsData>(new AthenaSearchTermsData()),
 209           nullptr /* KeywordWebDataService */,
 210           scoped_ptr<TemplateURLServiceClient>(
 211               new AthenaTemplateURLServiceClient()),
 212           nullptr /*GoogleURLTracker */,
 213           nullptr /* RapporService */,
 214           base::Closure() /* dsp_change_callback */)),
 215       provider_(new ::SearchProvider(
 216           this,
 217           template_url_service_.get(),
 218           scoped_ptr<AutocompleteProviderClient>(
 219               new AthenaAutocompleteProviderClient(browser_context_)))) {
 220   template_url_service_->Load();
 221 }
 222
 223 UrlSearchProvider::~UrlSearchProvider() {
 224 }
 225
 226 void UrlSearchProvider::Start(const base::string16& query) {
 227   const bool minimal_changes = query == input_.text();
 228   input_ = AutocompleteInput(query,
 229                              base::string16::npos /* cursor_position */,
 230                              std::string() /* desired_tld */,
 231                              GURL() /* current_url */,
 232                              metrics::OmniboxEventProto::INVALID_SPEC,
 233                              false /* prevent_inline_autocomplete */,
 234                              false /* prefer_keyword */,
 235                              true /* allow_extract_keyword_match */,
 236                              true /* want_asynchronous_matches */,
 237                              AthenaShellSchemeClassifier());
 238
 239   // Clearing results here may cause unexpected results.
 240   // TODO(mukai): fix this by fixing crbug.com/415500
 241   if (!minimal_changes)
 242     ClearResults();
 243
 244   if (input_.type() == metrics::OmniboxInputType::URL) {
 245     // TODO(hashimoto): Componentize HistoryURLProvider and remove this code.
 246     AutocompleteMatch what_you_typed_match(
 247         nullptr, 0, false, AutocompleteMatchType::URL_WHAT_YOU_TYPED);
 248     what_you_typed_match.destination_url = input_.canonicalized_url();
 249     what_you_typed_match.contents = input_.text();
 250     what_you_typed_match.relevance = kScoreForWhatYouTypedResult;
 251     Add(scoped_ptr<app_list::SearchResult>(
 252         new UrlSearchResult(browser_context_, what_you_typed_match)));
 253   }
 254
 255   provider_->Start(input_, minimal_changes);
 256 }
 257
 258 void UrlSearchProvider::Stop() {
 259   provider_->Stop(false);
 260 }
 261
 262 void UrlSearchProvider::OnProviderUpdate(bool updated_matches) {
 263   if (!updated_matches)
 264     return;
 265
 266   const ACMatches& matches = provider_->matches();
 267   for (ACMatches::const_iterator it = matches.begin(); it != matches.end();
 268        ++it) {
 269     if (!it->destination_url.is_valid())
 270       continue;
 271
 272     Add(scoped_ptr<app_list::SearchResult>(
 273         new UrlSearchResult(browser_context_, *it)));
 274   }
 275 }
 276
 277 }  // namespace athena