components/omnibox/browser/autocomplete_match.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 "components/omnibox/browser/autocomplete_match.h"
   6
   7 #include "base/i18n/time_formatting.h"
   8 #include "base/logging.h"
   9 #include "base/strings/string16.h"
  10 #include "base/strings/string_number_conversions.h"
  11 #include "base/strings/string_piece.h"
  12 #include "base/strings/string_split.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "base/time/time.h"
  16 #include "components/omnibox/browser/autocomplete_provider.h"
  17 #include "components/omnibox/browser/suggestion_answer.h"
  18 #include "components/search_engines/template_url.h"
  19 #include "components/search_engines/template_url_service.h"
  20 #include "components/url_formatter/url_formatter.h"
  21 #include "grit/components_scaled_resources.h"
  22
  23 namespace {
  24
  25 bool IsTrivialClassification(const ACMatchClassifications& classifications) {
  26   return classifications.empty() ||
  27       ((classifications.size() == 1) &&
  28        (classifications.back().style == ACMatchClassification::NONE));
  29 }
  30
  31 // Returns true if one of the |terms_prefixed_by_http_or_https| matches the
  32 // beginning of the URL (sans scheme).  (Recall that
  33 // |terms_prefixed_by_http_or_https|, for the input "http://a b" will be
  34 // ["a"].)  This suggests that the user wants a particular URL with a scheme
  35 // in mind, hence the caller should not consider another URL like this one
  36 // but with a different scheme to be a duplicate.  |languages| is used to
  37 // format punycoded URLs to decide if they match.
  38 bool WordMatchesURLContent(
  39     const std::vector<base::string16>& terms_prefixed_by_http_or_https,
  40     const std::string& languages,
  41     const GURL& url) {
  42   size_t prefix_length =
  43       url.scheme().length() + strlen(url::kStandardSchemeSeparator);
  44   DCHECK_GE(url.spec().length(), prefix_length);
  45   const base::string16& formatted_url = url_formatter::FormatUrl(
  46       url, languages, url_formatter::kFormatUrlOmitNothing,
  47       net::UnescapeRule::NORMAL, nullptr, nullptr, &prefix_length);
  48   if (prefix_length == base::string16::npos)
  49     return false;
  50   const base::string16& formatted_url_without_scheme =
  51       formatted_url.substr(prefix_length);
  52   for (const auto& term : terms_prefixed_by_http_or_https) {
  53     if (base::StartsWith(formatted_url_without_scheme, term,
  54                          base::CompareCase::SENSITIVE))
  55       return true;
  56   }
  57   return false;
  58 }
  59
  60 }  // namespace
  61
  62 // AutocompleteMatch ----------------------------------------------------------
  63
  64 // static
  65 const base::char16 AutocompleteMatch::kInvalidChars[] = {
  66   '\n', '\r', '\t',
  67   0x2028,  // Line separator
  68   0x2029,  // Paragraph separator
  69   0
  70 };
  71
  72 AutocompleteMatch::AutocompleteMatch()
  73     : provider(NULL),
  74       relevance(0),
  75       typed_count(-1),
  76       deletable(false),
  77       allowed_to_be_default_match(false),
  78       swap_contents_and_description(false),
  79       transition(ui::PAGE_TRANSITION_GENERATED),
  80       type(AutocompleteMatchType::SEARCH_WHAT_YOU_TYPED),
  81       from_previous(false) {
  82 }
  83
  84 AutocompleteMatch::AutocompleteMatch(AutocompleteProvider* provider,
  85                                      int relevance,
  86                                      bool deletable,
  87                                      Type type)
  88     : provider(provider),
  89       relevance(relevance),
  90       typed_count(-1),
  91       deletable(deletable),
  92       allowed_to_be_default_match(false),
  93       swap_contents_and_description(false),
  94       transition(ui::PAGE_TRANSITION_TYPED),
  95       type(type),
  96       from_previous(false) {
  97 }
  98
  99 AutocompleteMatch::AutocompleteMatch(const AutocompleteMatch& match)
 100     : provider(match.provider),
 101       relevance(match.relevance),
 102       typed_count(match.typed_count),
 103       deletable(match.deletable),
 104       fill_into_edit(match.fill_into_edit),
 105       inline_autocompletion(match.inline_autocompletion),
 106       allowed_to_be_default_match(match.allowed_to_be_default_match),
 107       destination_url(match.destination_url),
 108       stripped_destination_url(match.stripped_destination_url),
 109       contents(match.contents),
 110       contents_class(match.contents_class),
 111       description(match.description),
 112       description_class(match.description_class),
 113       swap_contents_and_description(match.swap_contents_and_description),
 114       answer_contents(match.answer_contents),
 115       answer_type(match.answer_type),
 116       answer(SuggestionAnswer::copy(match.answer.get())),
 117       transition(match.transition),
 118       type(match.type),
 119       associated_keyword(match.associated_keyword.get() ?
 120           new AutocompleteMatch(*match.associated_keyword) : NULL),
 121       keyword(match.keyword),
 122       from_previous(match.from_previous),
 123       search_terms_args(match.search_terms_args.get() ?
 124           new TemplateURLRef::SearchTermsArgs(*match.search_terms_args) :
 125           NULL),
 126       additional_info(match.additional_info),
 127       duplicate_matches(match.duplicate_matches) {
 128 }
 129
 130 AutocompleteMatch::~AutocompleteMatch() {
 131 }
 132
 133 AutocompleteMatch& AutocompleteMatch::operator=(
 134     const AutocompleteMatch& match) {
 135   if (this == &match)
 136     return *this;
 137
 138   provider = match.provider;
 139   relevance = match.relevance;
 140   typed_count = match.typed_count;
 141   deletable = match.deletable;
 142   fill_into_edit = match.fill_into_edit;
 143   inline_autocompletion = match.inline_autocompletion;
 144   allowed_to_be_default_match = match.allowed_to_be_default_match;
 145   destination_url = match.destination_url;
 146   stripped_destination_url = match.stripped_destination_url;
 147   contents = match.contents;
 148   contents_class = match.contents_class;
 149   description = match.description;
 150   description_class = match.description_class;
 151   swap_contents_and_description = match.swap_contents_and_description;
 152   answer_contents = match.answer_contents;
 153   answer_type = match.answer_type;
 154   answer = SuggestionAnswer::copy(match.answer.get());
 155   transition = match.transition;
 156   type = match.type;
 157   associated_keyword.reset(match.associated_keyword.get() ?
 158       new AutocompleteMatch(*match.associated_keyword) : NULL);
 159   keyword = match.keyword;
 160   from_previous = match.from_previous;
 161   search_terms_args.reset(match.search_terms_args.get() ?
 162       new TemplateURLRef::SearchTermsArgs(*match.search_terms_args) : NULL);
 163   additional_info = match.additional_info;
 164   duplicate_matches = match.duplicate_matches;
 165   return *this;
 166 }
 167
 168 // static
 169 int AutocompleteMatch::TypeToIcon(Type type) {
 170 #if !defined(OS_IOS)
 171   static const int kIcons[] = {
 172       IDR_OMNIBOX_HTTP,           // URL_WHAT_YOU_TYPE
 173       IDR_OMNIBOX_HTTP,           // HISTORY_URL
 174       IDR_OMNIBOX_HTTP,           // HISTORY_TITLE
 175       IDR_OMNIBOX_HTTP,           // HISTORY_BODY
 176       IDR_OMNIBOX_HTTP,           // HISTORY_KEYWORD
 177       IDR_OMNIBOX_HTTP,           // NAVSUGGEST
 178       IDR_OMNIBOX_SEARCH,         // SEARCH_WHAT_YOU_TYPED
 179       IDR_OMNIBOX_SEARCH,         // SEARCH_HISTORY
 180       IDR_OMNIBOX_SEARCH,         // SEARCH_SUGGEST
 181       IDR_OMNIBOX_SEARCH,         // SEARCH_SUGGEST_ENTITY
 182       IDR_OMNIBOX_SEARCH,         // SEARCH_SUGGEST_TAIL
 183       IDR_OMNIBOX_SEARCH,         // SEARCH_SUGGEST_PERSONALIZED
 184       IDR_OMNIBOX_SEARCH,         // SEARCH_SUGGEST_PROFILE
 185       IDR_OMNIBOX_SEARCH,         // SEARCH_OTHER_ENGINE
 186       IDR_OMNIBOX_EXTENSION_APP,  // EXTENSION_APP
 187       IDR_OMNIBOX_SEARCH,         // CONTACT_DEPRECATED
 188       IDR_OMNIBOX_HTTP,           // BOOKMARK_TITLE
 189       IDR_OMNIBOX_HTTP,           // NAVSUGGEST_PERSONALIZED
 190       IDR_OMNIBOX_CALCULATOR,     // CALCULATOR
 191   };
 192 #else
 193   static const int kIcons[] = {
 194       IDR_OMNIBOX_HTTP,           // URL_WHAT_YOU_TYPE
 195       IDR_OMNIBOX_HISTORY,        // HISTORY_URL
 196       IDR_OMNIBOX_HISTORY,        // HISTORY_TITLE
 197       IDR_OMNIBOX_HISTORY,        // HISTORY_BODY
 198       IDR_OMNIBOX_HISTORY,        // HISTORY_KEYWORD
 199       IDR_OMNIBOX_HTTP,           // NAVSUGGEST
 200       IDR_OMNIBOX_SEARCH,         // SEARCH_WHAT_YOU_TYPED
 201       IDR_OMNIBOX_HISTORY,        // SEARCH_HISTORY
 202       IDR_OMNIBOX_SEARCH,         // SEARCH_SUGGEST
 203       IDR_OMNIBOX_SEARCH,         // SEARCH_SUGGEST_ENTITY
 204       IDR_OMNIBOX_SEARCH,         // SEARCH_SUGGEST_TAIL
 205       IDR_OMNIBOX_SEARCH,         // SEARCH_SUGGEST_PERSONALIZED
 206       IDR_OMNIBOX_SEARCH,         // SEARCH_SUGGEST_PROFILE
 207       IDR_OMNIBOX_SEARCH,         // SEARCH_OTHER_ENGINE
 208       IDR_OMNIBOX_EXTENSION_APP,  // EXTENSION_APP
 209       IDR_OMNIBOX_SEARCH,         // CONTACT_DEPRECATED
 210       IDR_OMNIBOX_HTTP,           // BOOKMARK_TITLE
 211       IDR_OMNIBOX_HTTP,           // NAVSUGGEST_PERSONALIZED
 212       IDR_OMNIBOX_CALCULATOR,     // CALCULATOR
 213   };
 214 #endif
 215   static_assert(arraysize(kIcons) == AutocompleteMatchType::NUM_TYPES,
 216                 "icons array must have NUM_TYPES elements");
 217   return kIcons[type];
 218 }
 219
 220 // static
 221 bool AutocompleteMatch::MoreRelevant(const AutocompleteMatch& elem1,
 222                                      const AutocompleteMatch& elem2) {
 223   // For equal-relevance matches, we sort alphabetically, so that providers
 224   // who return multiple elements at the same priority get a "stable" sort
 225   // across multiple updates.
 226   return (elem1.relevance == elem2.relevance) ?
 227       (elem1.contents < elem2.contents) : (elem1.relevance > elem2.relevance);
 228 }
 229
 230 // static
 231 bool AutocompleteMatch::DestinationsEqual(const AutocompleteMatch& elem1,
 232                                           const AutocompleteMatch& elem2) {
 233   if (elem1.stripped_destination_url.is_empty() &&
 234       elem2.stripped_destination_url.is_empty())
 235     return false;
 236   return elem1.stripped_destination_url == elem2.stripped_destination_url;
 237 }
 238
 239 // static
 240 void AutocompleteMatch::ClassifyMatchInString(
 241     const base::string16& find_text,
 242     const base::string16& text,
 243     int style,
 244     ACMatchClassifications* classification) {
 245   ClassifyLocationInString(text.find(find_text), find_text.length(),
 246                            text.length(), style, classification);
 247 }
 248
 249 // static
 250 void AutocompleteMatch::ClassifyLocationInString(
 251     size_t match_location,
 252     size_t match_length,
 253     size_t overall_length,
 254     int style,
 255     ACMatchClassifications* classification) {
 256   classification->clear();
 257
 258   // Don't classify anything about an empty string
 259   // (AutocompleteMatch::Validate() checks this).
 260   if (overall_length == 0)
 261     return;
 262
 263   // Mark pre-match portion of string (if any).
 264   if (match_location != 0) {
 265     classification->push_back(ACMatchClassification(0, style));
 266   }
 267
 268   // Mark matching portion of string.
 269   if (match_location == base::string16::npos) {
 270     // No match, above classification will suffice for whole string.
 271     return;
 272   }
 273   // Classifying an empty match makes no sense and will lead to validation
 274   // errors later.
 275   DCHECK_GT(match_length, 0U);
 276   classification->push_back(ACMatchClassification(match_location,
 277       (style | ACMatchClassification::MATCH) & ~ACMatchClassification::DIM));
 278
 279   // Mark post-match portion of string (if any).
 280   const size_t after_match(match_location + match_length);
 281   if (after_match < overall_length) {
 282     classification->push_back(ACMatchClassification(after_match, style));
 283   }
 284 }
 285
 286 // static
 287 AutocompleteMatch::ACMatchClassifications
 288     AutocompleteMatch::MergeClassifications(
 289     const ACMatchClassifications& classifications1,
 290     const ACMatchClassifications& classifications2) {
 291   // We must return the empty vector only if both inputs are truly empty.
 292   // The result of merging an empty vector with a single (0, NONE)
 293   // classification is the latter one-entry vector.
 294   if (IsTrivialClassification(classifications1))
 295     return classifications2.empty() ? classifications1 : classifications2;
 296   if (IsTrivialClassification(classifications2))
 297     return classifications1;
 298
 299   ACMatchClassifications output;
 300   for (ACMatchClassifications::const_iterator i = classifications1.begin(),
 301        j = classifications2.begin(); i != classifications1.end();) {
 302     AutocompleteMatch::AddLastClassificationIfNecessary(&output,
 303         std::max(i->offset, j->offset), i->style | j->style);
 304     const size_t next_i_offset = (i + 1) == classifications1.end() ?
 305         static_cast<size_t>(-1) : (i + 1)->offset;
 306     const size_t next_j_offset = (j + 1) == classifications2.end() ?
 307         static_cast<size_t>(-1) : (j + 1)->offset;
 308     if (next_i_offset >= next_j_offset)
 309       ++j;
 310     if (next_j_offset >= next_i_offset)
 311       ++i;
 312   }
 313
 314   return output;
 315 }
 316
 317 // static
 318 std::string AutocompleteMatch::ClassificationsToString(
 319     const ACMatchClassifications& classifications) {
 320   std::string serialized_classifications;
 321   for (size_t i = 0; i < classifications.size(); ++i) {
 322     if (i)
 323       serialized_classifications += ',';
 324     serialized_classifications += base::IntToString(classifications[i].offset) +
 325         ',' + base::IntToString(classifications[i].style);
 326   }
 327   return serialized_classifications;
 328 }
 329
 330 // static
 331 ACMatchClassifications AutocompleteMatch::ClassificationsFromString(
 332     const std::string& serialized_classifications) {
 333   ACMatchClassifications classifications;
 334   std::vector<base::StringPiece> tokens = base::SplitStringPiece(
 335       serialized_classifications, ",", base::KEEP_WHITESPACE,
 336       base::SPLIT_WANT_NONEMPTY);
 337   DCHECK(!(tokens.size() & 1));  // The number of tokens should be even.
 338   for (size_t i = 0; i < tokens.size(); i += 2) {
 339     int classification_offset = 0;
 340     int classification_style = ACMatchClassification::NONE;
 341     if (!base::StringToInt(tokens[i], &classification_offset) ||
 342         !base::StringToInt(tokens[i + 1], &classification_style)) {
 343       NOTREACHED();
 344       return classifications;
 345     }
 346     classifications.push_back(ACMatchClassification(classification_offset,
 347                                                     classification_style));
 348   }
 349   return classifications;
 350 }
 351
 352 // static
 353 void AutocompleteMatch::AddLastClassificationIfNecessary(
 354     ACMatchClassifications* classifications,
 355     size_t offset,
 356     int style) {
 357   DCHECK(classifications);
 358   if (classifications->empty() || classifications->back().style != style) {
 359     DCHECK(classifications->empty() ||
 360            (offset > classifications->back().offset));
 361     classifications->push_back(ACMatchClassification(offset, style));
 362   }
 363 }
 364
 365 // static
 366 bool AutocompleteMatch::HasMatchStyle(
 367     const ACMatchClassifications& classifications) {
 368   for (const auto& it : classifications) {
 369     if (it.style & AutocompleteMatch::ACMatchClassification::MATCH)
 370       return true;
 371   }
 372   return false;
 373 }
 374
 375 // static
 376 base::string16 AutocompleteMatch::SanitizeString(const base::string16& text) {
 377   // NOTE: This logic is mirrored by |sanitizeString()| in
 378   // omnibox_custom_bindings.js.
 379   base::string16 result;
 380   base::TrimWhitespace(text, base::TRIM_LEADING, &result);
 381   base::RemoveChars(result, kInvalidChars, &result);
 382   return result;
 383 }
 384
 385 // static
 386 bool AutocompleteMatch::IsSearchType(Type type) {
 387   return type == AutocompleteMatchType::SEARCH_WHAT_YOU_TYPED ||
 388          type == AutocompleteMatchType::SEARCH_HISTORY ||
 389          type == AutocompleteMatchType::SEARCH_SUGGEST ||
 390          type == AutocompleteMatchType::SEARCH_OTHER_ENGINE ||
 391          type == AutocompleteMatchType::CALCULATOR ||
 392          IsSpecializedSearchType(type);
 393 }
 394
 395 // static
 396 bool AutocompleteMatch::IsSpecializedSearchType(Type type) {
 397   return type == AutocompleteMatchType::SEARCH_SUGGEST_ENTITY ||
 398          type == AutocompleteMatchType::SEARCH_SUGGEST_TAIL ||
 399          type == AutocompleteMatchType::SEARCH_SUGGEST_PERSONALIZED ||
 400          type == AutocompleteMatchType::SEARCH_SUGGEST_PROFILE;
 401 }
 402
 403 // static
 404 TemplateURL* AutocompleteMatch::GetTemplateURLWithKeyword(
 405     TemplateURLService* template_url_service,
 406     const base::string16& keyword,
 407     const std::string& host) {
 408   if (template_url_service == NULL)
 409     return NULL;
 410   TemplateURL* template_url = keyword.empty() ?
 411       NULL : template_url_service->GetTemplateURLForKeyword(keyword);
 412   return (template_url || host.empty()) ?
 413       template_url : template_url_service->GetTemplateURLForHost(host);
 414 }
 415
 416 // static
 417 GURL AutocompleteMatch::GURLToStrippedGURL(
 418     const GURL& url,
 419     const AutocompleteInput& input,
 420     const std::string& languages,
 421     TemplateURLService* template_url_service,
 422     const base::string16& keyword) {
 423   if (!url.is_valid())
 424     return url;
 425
 426   GURL stripped_destination_url = url;
 427
 428   // If the destination URL looks like it was generated from a TemplateURL,
 429   // remove all substitutions other than the search terms.  This allows us
 430   // to eliminate cases like past search URLs from history that differ only
 431   // by some obscure query param from each other or from the search/keyword
 432   // provider matches.
 433   TemplateURL* template_url = GetTemplateURLWithKeyword(
 434       template_url_service, keyword, stripped_destination_url.host());
 435   if (template_url != NULL &&
 436       template_url->SupportsReplacement(
 437           template_url_service->search_terms_data())) {
 438     base::string16 search_terms;
 439     if (template_url->ExtractSearchTermsFromURL(
 440         stripped_destination_url,
 441         template_url_service->search_terms_data(),
 442         &search_terms)) {
 443       stripped_destination_url =
 444           GURL(template_url->url_ref().ReplaceSearchTerms(
 445               TemplateURLRef::SearchTermsArgs(search_terms),
 446               template_url_service->search_terms_data()));
 447     }
 448   }
 449
 450   // |replacements| keeps all the substitions we're going to make to
 451   // from {destination_url} to {stripped_destination_url}.  |need_replacement|
 452   // is a helper variable that helps us keep track of whether we need
 453   // to apply the replacement.
 454   bool needs_replacement = false;
 455   GURL::Replacements replacements;
 456
 457   // Remove the www. prefix from the host.
 458   static const char prefix[] = "www.";
 459   static const size_t prefix_len = arraysize(prefix) - 1;
 460   std::string host = stripped_destination_url.host();
 461   if (host.compare(0, prefix_len, prefix) == 0) {
 462     replacements.SetHostStr(base::StringPiece(host).substr(prefix_len));
 463     needs_replacement = true;
 464   }
 465
 466   // Remove any trailing slash (if it's not a lone slash), or add a slash (to
 467   // make a lone slash) if the path is empty.  (We can't unconditionally
 468   // remove even lone slashes because for some schemes the path must consist
 469   // of at least a slash.)
 470   const std::string& path = stripped_destination_url.path();
 471   if ((path.length() > 1) && (path[path.length() - 1] == '/')) {
 472     replacements.SetPathStr(
 473         base::StringPiece(path).substr(0, path.length() - 1));
 474     needs_replacement = true;
 475   } else if (path.empty()) {
 476     static const char slash[] = "/";
 477     replacements.SetPathStr(base::StringPiece(slash));
 478     needs_replacement = true;
 479   }
 480
 481   // Replace https protocol with http, as long as the user didn't explicitly
 482   // specify one of the two.
 483   if (stripped_destination_url.SchemeIs(url::kHttpsScheme) &&
 484       (input.terms_prefixed_by_http_or_https().empty() ||
 485        !WordMatchesURLContent(
 486            input.terms_prefixed_by_http_or_https(), languages, url))) {
 487     replacements.SetScheme(url::kHttpScheme,
 488                            url::Component(0, strlen(url::kHttpScheme)));
 489     needs_replacement = true;
 490   }
 491
 492   if (needs_replacement)
 493     stripped_destination_url = stripped_destination_url.ReplaceComponents(
 494         replacements);
 495   return stripped_destination_url;
 496 }
 497
 498 void AutocompleteMatch::ComputeStrippedDestinationURL(
 499     const AutocompleteInput& input,
 500     const std::string& languages,
 501     TemplateURLService* template_url_service) {
 502   stripped_destination_url = GURLToStrippedGURL(
 503       destination_url, input, languages, template_url_service, keyword);
 504 }
 505
 506 void AutocompleteMatch::EnsureUWYTIsAllowedToBeDefault(
 507     const AutocompleteInput& input,
 508     const std::string& languages,
 509     TemplateURLService* template_url_service) {
 510   if (!allowed_to_be_default_match) {
 511     const GURL& stripped_canonical_input_url =
 512         AutocompleteMatch::GURLToStrippedGURL(
 513             input.canonicalized_url(), input, languages, template_url_service,
 514             base::string16());
 515     ComputeStrippedDestinationURL(input, languages, template_url_service);
 516     allowed_to_be_default_match =
 517         stripped_canonical_input_url == stripped_destination_url;
 518   }
 519 }
 520
 521 void AutocompleteMatch::GetKeywordUIState(
 522     TemplateURLService* template_url_service,
 523     base::string16* keyword,
 524     bool* is_keyword_hint) const {
 525   *is_keyword_hint = associated_keyword.get() != NULL;
 526   keyword->assign(*is_keyword_hint ? associated_keyword->keyword :
 527       GetSubstitutingExplicitlyInvokedKeyword(template_url_service));
 528 }
 529
 530 base::string16 AutocompleteMatch::GetSubstitutingExplicitlyInvokedKeyword(
 531     TemplateURLService* template_url_service) const {
 532   if (transition != ui::PAGE_TRANSITION_KEYWORD ||
 533       template_url_service == NULL) {
 534     return base::string16();
 535   }
 536
 537   const TemplateURL* t_url = GetTemplateURL(template_url_service, false);
 538   return (t_url &&
 539           t_url->SupportsReplacement(
 540               template_url_service->search_terms_data())) ?
 541       keyword : base::string16();
 542 }
 543
 544 TemplateURL* AutocompleteMatch::GetTemplateURL(
 545     TemplateURLService* template_url_service,
 546     bool allow_fallback_to_destination_host) const {
 547   return GetTemplateURLWithKeyword(
 548       template_url_service, keyword,
 549       allow_fallback_to_destination_host ?
 550           destination_url.host() : std::string());
 551 }
 552
 553 void AutocompleteMatch::RecordAdditionalInfo(const std::string& property,
 554                                              const std::string& value) {
 555   DCHECK(!property.empty());
 556   DCHECK(!value.empty());
 557   additional_info[property] = value;
 558 }
 559
 560 void AutocompleteMatch::RecordAdditionalInfo(const std::string& property,
 561                                              int value) {
 562   RecordAdditionalInfo(property, base::IntToString(value));
 563 }
 564
 565 void AutocompleteMatch::RecordAdditionalInfo(const std::string& property,
 566                                              const base::Time& value) {
 567   RecordAdditionalInfo(property,
 568                        base::UTF16ToUTF8(
 569                            base::TimeFormatShortDateAndTime(value)));
 570 }
 571
 572 std::string AutocompleteMatch::GetAdditionalInfo(
 573     const std::string& property) const {
 574   AdditionalInfo::const_iterator i(additional_info.find(property));
 575   return (i == additional_info.end()) ? std::string() : i->second;
 576 }
 577
 578 bool AutocompleteMatch::IsVerbatimType() const {
 579   const bool is_keyword_verbatim_match =
 580       (type == AutocompleteMatchType::SEARCH_OTHER_ENGINE &&
 581        provider != NULL &&
 582        provider->type() == AutocompleteProvider::TYPE_SEARCH);
 583   return type == AutocompleteMatchType::SEARCH_WHAT_YOU_TYPED ||
 584       type == AutocompleteMatchType::URL_WHAT_YOU_TYPED ||
 585       is_keyword_verbatim_match;
 586 }
 587
 588 bool AutocompleteMatch::SupportsDeletion() const {
 589   if (deletable)
 590     return true;
 591
 592   for (ACMatches::const_iterator it(duplicate_matches.begin());
 593        it != duplicate_matches.end(); ++it) {
 594     if (it->deletable)
 595       return true;
 596   }
 597   return false;
 598 }
 599
 600 void AutocompleteMatch::PossiblySwapContentsAndDescriptionForDisplay() {
 601   if (swap_contents_and_description) {
 602     std::swap(contents, description);
 603     std::swap(contents_class, description_class);
 604   }
 605 }
 606
 607 #ifndef NDEBUG
 608 void AutocompleteMatch::Validate() const {
 609   ValidateClassifications(contents, contents_class);
 610   ValidateClassifications(description, description_class);
 611 }
 612
 613 void AutocompleteMatch::ValidateClassifications(
 614     const base::string16& text,
 615     const ACMatchClassifications& classifications) const {
 616   if (text.empty()) {
 617     DCHECK(classifications.empty());
 618     return;
 619   }
 620
 621   // The classifications should always cover the whole string.
 622   DCHECK(!classifications.empty()) << "No classification for \"" << text << '"';
 623   DCHECK_EQ(0U, classifications[0].offset)
 624       << "Classification misses beginning for \"" << text << '"';
 625   if (classifications.size() == 1)
 626     return;
 627
 628   // The classifications should always be sorted.
 629   size_t last_offset = classifications[0].offset;
 630   for (ACMatchClassifications::const_iterator i(classifications.begin() + 1);
 631        i != classifications.end(); ++i) {
 632     const char* provider_name = provider ? provider->GetName() : "None";
 633     DCHECK_GT(i->offset, last_offset)
 634         << " Classification for \"" << text << "\" with offset of " << i->offset
 635         << " is unsorted in relation to last offset of " << last_offset
 636         << ". Provider: " << provider_name << ".";
 637     DCHECK_LT(i->offset, text.length())
 638         << " Classification of [" << i->offset << "," << text.length()
 639         << "] is out of bounds for \"" << text << "\". Provider: "
 640         << provider_name << ".";
 641     last_offset = i->offset;
 642   }
 643 }
 644 #endif