Part 6 of search provider refactoring.

chrome/browser/autocomplete/zero_suggest_provider.cc

 // 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 "chrome/browser/autocomplete/zero_suggest_provider.h"
 
 #include "base/callback.h"
 #include "base/i18n/case_conversion.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/metrics/histogram.h"
@@ skipping 121 matching lines @@
   base::string16 prefix;
   TemplateURLRef::SearchTermsArgs search_term_args(prefix);
   search_term_args.current_page_url = current_query_;
   GURL suggest_url(default_provider->suggestions_url_ref().
                    ReplaceSearchTerms(search_term_args));
   if (!CanSendURL(current_page_url, suggest_url,
           template_url_service_->GetDefaultSearchProvider(),
           page_classification, profile_) ||
       !OmniboxFieldTrial::InZeroSuggestFieldTrial())
     return;
-  verbatim_relevance_ = kDefaultVerbatimZeroSuggestRelevance;
   done_ = false;
   // TODO(jered): Consider adding locally-sourced zero-suggestions here too.
   // These may be useful on the NTP or more relevant to the user than server
   // suggestions, if based on local browsing history.
   Run(suggest_url);
 }
 
 ZeroSuggestProvider::ZeroSuggestProvider(
   AutocompleteProviderListener* listener,
   Profile* profile)
     : BaseSearchProvider(listener, profile,
                          AutocompleteProvider::TYPE_ZERO_SUGGEST),
       template_url_service_(TemplateURLServiceFactory::GetForProfile(profile)),
       have_pending_request_(false),
-      verbatim_relevance_(kDefaultVerbatimZeroSuggestRelevance),
       weak_ptr_factory_(this) {
 }
 
 ZeroSuggestProvider::~ZeroSuggestProvider() {
 }
 
 const TemplateURL* ZeroSuggestProvider::GetTemplateURL(
     const SuggestResult& result) const {
   // Zero suggest provider should not receive keyword results.
   DCHECK(!result.from_keyword_provider());
@@ skipping 15 matching lines @@
 }
 
 void ZeroSuggestProvider::StopSuggest() {
   if (have_pending_request_)
     LogOmniboxZeroSuggestRequest(ZERO_SUGGEST_REQUEST_INVALIDATED);
   have_pending_request_ = false;
   fetcher_.reset();
 }
 
 void ZeroSuggestProvider::ClearAllResults() {
-  query_matches_map_.clear();
-  navigation_results_.clear();
+  // 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 StartZeroSuggest() call to determine the current url
+  // match relevance.
+  results_.suggest_results.clear();
+  results_.navigation_results.clear();
   current_query_.clear();
   matches_.clear();
 }
 
-void ZeroSuggestProvider::FillResults(const base::Value& root_val,
-                                      int* verbatim_relevance,
-                                      SuggestResults* suggest_results,
-                                      NavigationResults* navigation_results) {
-  base::string16 query;
-  const base::ListValue* root_list = NULL;
-  const base::ListValue* results = NULL;
-  const base::ListValue* relevances = NULL;
-  // The response includes the query, which should be empty for ZeroSuggest
-  // responses.
-  if (!root_val.GetAsList(&root_list) || !root_list->GetString(0, &query) ||
-      (!query.empty()) || !root_list->GetList(1, &results))
-    return;
-
-  // 3rd element: Description list.
-  const base::ListValue* descriptions = NULL;
-  root_list->GetList(2, &descriptions);
-
-  // 4th element: Disregard the query URL list for now.
-
-  // Reset suggested relevance information from the provider.
-  *verbatim_relevance = kDefaultVerbatimZeroSuggestRelevance;
-
-  // 5th element: Optional key-value pairs from the Suggest server.
-  const base::ListValue* types = NULL;
-  const base::DictionaryValue* extras = NULL;
-  if (root_list->GetDictionary(4, &extras)) {
-    extras->GetList("google:suggesttype", &types);
-
-    // Discard this list if its size does not match that of the suggestions.
-    if (extras->GetList("google:suggestrelevance", &relevances) &&
-        relevances->GetSize() != results->GetSize())
-      relevances = NULL;
-    extras->GetInteger("google:verbatimrelevance", verbatim_relevance);
-
-    // Check if the active suggest field trial (if any) has triggered.
-    bool triggered = false;
-    extras->GetBoolean("google:fieldtrialtriggered", &triggered);
-    field_trial_triggered_ |= triggered;
-    field_trial_triggered_in_session_ |= triggered;
-  }
-
-  // Clear the previous results now that new results are available.
-  suggest_results->clear();
-  navigation_results->clear();
-
-  base::string16 result, title;
-  std::string type;
-  const base::string16 current_query_string16 =
-      base::ASCIIToUTF16(current_query_);
-  const std::string languages(
-      profile_->GetPrefs()->GetString(prefs::kAcceptLanguages));
-  for (size_t index = 0; results->GetString(index, &result); ++index) {
-    // Google search may return empty suggestions for weird input characters,
-    // they make no sense at all and can cause problems in our code.
-    if (result.empty())
-      continue;
-
-    int relevance = kDefaultZeroSuggestRelevance;
-
-    // Apply valid suggested relevance scores; discard invalid lists.
-    if (relevances != NULL && !relevances->GetInteger(index, &relevance))
-      relevances = NULL;
-    if (types && types->GetString(index, &type) && (type == "NAVIGATION")) {
-      // Do not blindly trust the URL coming from the server to be valid.
-      GURL url(URLFixerUpper::FixupURL(
-          base::UTF16ToUTF8(result), std::string()));
-      if (url.is_valid()) {
-        if (descriptions != NULL)
-          descriptions->GetString(index, &title);
-        navigation_results->push_back(NavigationResult(
-            *this, url, title, false, relevance, relevances != NULL,
-            current_query_string16, languages));
-      }
-    } else {
-      suggest_results->push_back(SuggestResult(
-          result, AutocompleteMatchType::SEARCH_SUGGEST, result,
-          base::string16(), std::string(), std::string(), false, relevance,
-          relevances != NULL, false, current_query_string16));
-    }
-  }
-}
-
 void ZeroSuggestProvider::AddSuggestResultsToMap(
     const SuggestResults& results,
     MatchMap* map) {
   for (size_t i = 0; i < results.size(); ++i) {
     const base::string16& query_string(results[i].suggestion());
     // TODO(mariakhomenko): Do not reconstruct SuggestResult objects with
     // a different query -- create correct objects to begin with.
     const SuggestResult suggestion(
         query_string, AutocompleteMatchType::SEARCH_SUGGEST, query_string,
         base::string16(), std::string(), std::string(), false,
@@ skipping 53 matching lines @@
       ts->GetMostVisitedURLs(
           base::Bind(&ZeroSuggestProvider::OnMostVisitedUrlsAvailable,
                      weak_ptr_factory_.GetWeakPtr()), false);
     }
   }
   have_pending_request_ = true;
   LogOmniboxZeroSuggestRequest(ZERO_SUGGEST_REQUEST_SENT);
 }
 
 void ZeroSuggestProvider::ParseSuggestResults(const base::Value& root_val) {
-  SuggestResults suggest_results;
-  FillResults(root_val, &verbatim_relevance_,
-              &suggest_results, &navigation_results_);
+  base::string16 query;
+  const base::ListValue* root_list = NULL;
+  const base::ListValue* results = NULL;
+  const base::ListValue* relevances = NULL;
+  // The response includes the query, which should be empty for ZeroSuggest
+  // responses.
+  if (!root_val.GetAsList(&root_list) || !root_list->GetString(0, &query) ||
+      (!query.empty()) || !root_list->GetList(1, &results))
+    return;
 
-  query_matches_map_.clear();
-  AddSuggestResultsToMap(suggest_results, &query_matches_map_);
+  // 3rd element: Description list.
+  const base::ListValue* descriptions = NULL;
+  root_list->GetList(2, &descriptions);
+
+  // 4th element: Disregard the query URL list for now.
+
+  // Reset suggested relevance information from the provider.
+  results_.verbatim_relevance = -1;
+
+  // 5th element: Optional key-value pairs from the Suggest server.
+  const base::ListValue* types = NULL;
+  const base::DictionaryValue* extras = NULL;
+  if (root_list->GetDictionary(4, &extras)) {
+    extras->GetList("google:suggesttype", &types);
+
+    // Discard this list if its size does not match that of the suggestions.
+    if (extras->GetList("google:suggestrelevance", &relevances) &&
+        relevances->GetSize() != results->GetSize())
+      relevances = NULL;
+    extras->GetInteger("google:verbatimrelevance",
+                       &results_.verbatim_relevance);
+
+    // Check if the active suggest field trial (if any) has triggered.
+    bool triggered = false;
+    extras->GetBoolean("google:fieldtrialtriggered", &triggered);
+    field_trial_triggered_ |= triggered;
+    field_trial_triggered_in_session_ |= triggered;
+  }
+
+  // Clear the previous results now that new results are available.
+  results_.suggest_results.clear();
+  results_.navigation_results.clear();
+
+  base::string16 result, title;
+  std::string type;
+  const base::string16 current_query_string16 =
+      base::ASCIIToUTF16(current_query_);
+  const std::string languages(
+      profile_->GetPrefs()->GetString(prefs::kAcceptLanguages));
+  for (size_t index = 0; results->GetString(index, &result); ++index) {
+    // Google search may return empty suggestions for weird input characters,
+    // they make no sense at all and can cause problems in our code.
+    if (result.empty())
+      continue;
+
+    int relevance = kDefaultZeroSuggestRelevance;
+
+    // Apply valid suggested relevance scores; discard invalid lists.
+    if (relevances != NULL && !relevances->GetInteger(index, &relevance))
+      relevances = NULL;
+    if (types && types->GetString(index, &type) && (type == "NAVIGATION")) {
+      // Do not blindly trust the URL coming from the server to be valid.
+      GURL url(URLFixerUpper::FixupURL(
+          base::UTF16ToUTF8(result), std::string()));
+      if (url.is_valid()) {
+        if (descriptions != NULL)
+          descriptions->GetString(index, &title);
+        results_.navigation_results.push_back(NavigationResult(
+            *this, url, title, false, relevance, relevances != NULL,
+            current_query_string16, languages));
+      }
+    } else {
+      results_.suggest_results.push_back(SuggestResult(
+          result, AutocompleteMatchType::SEARCH_SUGGEST, result,
+          base::string16(), std::string(), std::string(), false, relevance,
+          relevances != NULL, false, current_query_string16));
+    }
+  }
 }
 
 void ZeroSuggestProvider::OnMostVisitedUrlsAvailable(
     const history::MostVisitedURLList& urls) {
   most_visited_urls_ = urls;
 }
 
 void ZeroSuggestProvider::ConvertResultsToAutocompleteMatches() {
   matches_.clear();
 
   const TemplateURL* default_provider =
       template_url_service_->GetDefaultSearchProvider();
   // Fail if we can't set the clickthrough URL for query suggestions.
   if (default_provider == NULL || !default_provider->SupportsReplacement())
     return;
 
-  const int num_query_results = query_matches_map_.size();
-  const int num_nav_results = navigation_results_.size();
+  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("ZeroSuggest.QueryResults", num_query_results);
   UMA_HISTOGRAM_COUNTS("ZeroSuggest.URLResults",  num_nav_results);
   UMA_HISTOGRAM_COUNTS("ZeroSuggest.AllResults", num_results);
 
   // Show Most Visited results after ZeroSuggest response is received.
   if (OmniboxFieldTrial::InZeroSuggestMostVisitedFieldTrial()) {
     if (!current_url_match_.destination_url.is_valid())
       return;
     matches_.push_back(current_url_match_);
@@ skipping 17 matching lines @@
     return;
   }
 
   if (num_results == 0)
     return;
 
   // TODO(jered): Rip this out once the first match is decoupled from the
   // current typing in the omnibox.
   matches_.push_back(current_url_match_);
 
-  for (MatchMap::const_iterator it(query_matches_map_.begin());
-       it != query_matches_map_.end(); ++it)
+  for (MatchMap::const_iterator it(map.begin()); it != map.end(); ++it)
     matches_.push_back(it->second);
 
-  for (NavigationResults::const_iterator it(navigation_results_.begin());
-       it != navigation_results_.end(); ++it)
+  const NavigationResults& nav_results(results_.navigation_results);
+  for (NavigationResults::const_iterator it(nav_results.begin());
+       it != nav_results.end(); ++it)
     matches_.push_back(NavigationToMatch(*it));
 }
 
 AutocompleteMatch ZeroSuggestProvider::MatchForCurrentURL() {
   AutocompleteInput input(permanent_text_, base::string16::npos, base::string16(),
                           GURL(current_query_), current_page_classification_,
                           false, false, true, AutocompleteInput::ALL_MATCHES);
 
   AutocompleteMatch match;
   AutocompleteClassifierFactory::GetForProfile(profile_)->Classify(
       permanent_text_, false, true, current_page_classification_, &match, NULL);
   match.is_history_what_you_typed_match = false;
   match.allowed_to_be_default_match = true;
 
   // 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.
-  match.relevance = verbatim_relevance_;
+  match.relevance = GetVerbatimRelevance();
 
   return match;
 }
+
+int ZeroSuggestProvider::GetVerbatimRelevance() const {
+  return results_.verbatim_relevance >= 0 ?
+      results_.verbatim_relevance : kDefaultVerbatimZeroSuggestRelevance;
+}