chrome/browser/autocomplete/builtin_provider.cc

   1 // Copyright (c) 2012 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 "chrome/browser/autocomplete/builtin_provider.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/strings/string_util.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "chrome/browser/autocomplete/autocomplete_input.h"
  12 #include "chrome/browser/autocomplete/history_provider.h"
  13 #include "chrome/common/net/url_fixer_upper.h"
  14 #include "chrome/common/url_constants.h"
  15
  16 namespace {
  17
  18 // This list should be kept in sync with chrome/common/url_constants.h.
  19 // Only include useful sub-pages, confirmation alerts are not useful.
  20 const char* const kChromeSettingsSubPages[] = {
  21   chrome::kAutofillSubPage,
  22   chrome::kClearBrowserDataSubPage,
  23   chrome::kContentSettingsSubPage,
  24   chrome::kContentSettingsExceptionsSubPage,
  25   chrome::kImportDataSubPage,
  26   chrome::kLanguageOptionsSubPage,
  27   chrome::kPasswordManagerSubPage,
  28   chrome::kResetProfileSettingsSubPage,
  29   chrome::kSearchEnginesSubPage,
  30   chrome::kSyncSetupSubPage,
  31 #if defined(OS_CHROMEOS)
  32   chrome::kInternetOptionsSubPage,
  33 #endif
  34 };
  35
  36 }  // namespace
  37
  38 const int BuiltinProvider::kRelevance = 860;
  39
  40 BuiltinProvider::BuiltinProvider(AutocompleteProviderListener* listener,
  41                                  Profile* profile)
  42     : AutocompleteProvider(listener, profile,
  43           AutocompleteProvider::TYPE_BUILTIN) {
  44   std::vector<std::string> builtins(
  45       chrome::kChromeHostURLs,
  46       chrome::kChromeHostURLs + chrome::kNumberOfChromeHostURLs);
  47   std::sort(builtins.begin(), builtins.end());
  48   for (std::vector<std::string>::iterator i(builtins.begin());
  49        i != builtins.end(); ++i)
  50     builtins_.push_back(base::ASCIIToUTF16(*i));
  51   base::string16 settings(base::ASCIIToUTF16(chrome::kChromeUISettingsHost) +
  52                           base::ASCIIToUTF16("/"));
  53   for (size_t i = 0; i < arraysize(kChromeSettingsSubPages); i++) {
  54     builtins_.push_back(
  55         settings + base::ASCIIToUTF16(kChromeSettingsSubPages[i]));
  56   }
  57 }
  58
  59 void BuiltinProvider::Start(const AutocompleteInput& input,
  60                             bool minimal_changes) {
  61   matches_.clear();
  62   if ((input.type() == AutocompleteInput::INVALID) ||
  63       (input.type() == AutocompleteInput::FORCED_QUERY) ||
  64       (input.type() == AutocompleteInput::QUERY))
  65     return;
  66
  67   const base::string16 kAbout = base::ASCIIToUTF16(content::kAboutScheme) +
  68       base::ASCIIToUTF16(content::kStandardSchemeSeparator);
  69   const base::string16 kChrome = base::ASCIIToUTF16(content::kChromeUIScheme) +
  70       base::ASCIIToUTF16(content::kStandardSchemeSeparator);
  71
  72   const int kUrl = ACMatchClassification::URL;
  73   const int kMatch = kUrl | ACMatchClassification::MATCH;
  74
  75   base::string16 text = input.text();
  76   bool starting_chrome = StartsWith(kChrome, text, false);
  77   if (starting_chrome || StartsWith(kAbout, text, false)) {
  78     ACMatchClassifications styles;
  79     // Highlight the input portion matching "chrome://"; or if the user has
  80     // input "about:" (with optional slashes), highlight the whole "chrome://".
  81     const size_t kAboutSchemeLength = strlen(content::kAboutScheme);
  82     bool highlight = starting_chrome || text.length() > kAboutSchemeLength;
  83     styles.push_back(ACMatchClassification(0, highlight ? kMatch : kUrl));
  84     size_t offset = starting_chrome ? text.length() : kChrome.length();
  85     if (highlight)
  86       styles.push_back(ACMatchClassification(offset, kUrl));
  87     // Include some common builtin chrome URLs as the user types the scheme.
  88     AddMatch(base::ASCIIToUTF16(chrome::kChromeUIChromeURLsURL),
  89              base::string16(), styles);
  90     AddMatch(base::ASCIIToUTF16(chrome::kChromeUISettingsURL),
  91              base::string16(), styles);
  92     AddMatch(base::ASCIIToUTF16(chrome::kChromeUIVersionURL),
  93              base::string16(), styles);
  94   } else {
  95     // Match input about: or chrome: URL input against builtin chrome URLs.
  96     GURL url = URLFixerUpper::FixupURL(base::UTF16ToUTF8(text), std::string());
  97     // BuiltinProvider doesn't know how to suggest valid ?query or #fragment
  98     // extensions to chrome: URLs.
  99     if (url.SchemeIs(content::kChromeUIScheme) && url.has_host() &&
 100         !url.has_query() && !url.has_ref()) {
 101       // Include the path for sub-pages (e.g. "chrome://settings/browser").
 102       base::string16 host_and_path = base::UTF8ToUTF16(url.host() + url.path());
 103       base::TrimString(host_and_path, base::ASCIIToUTF16("/").c_str(),
 104                        &host_and_path);
 105       size_t match_length = kChrome.length() + host_and_path.length();
 106       for (Builtins::const_iterator i(builtins_.begin());
 107           (i != builtins_.end()) && (matches_.size() < kMaxMatches); ++i) {
 108         if (StartsWith(*i, host_and_path, false)) {
 109           ACMatchClassifications styles;
 110           // Highlight the "chrome://" scheme, even for input "about:foo".
 111           styles.push_back(ACMatchClassification(0, kMatch));
 112           base::string16 match_string = kChrome + *i;
 113           if (match_string.length() > match_length)
 114             styles.push_back(ACMatchClassification(match_length, kUrl));
 115           AddMatch(match_string, match_string.substr(match_length), styles);
 116         }
 117       }
 118     }
 119   }
 120
 121   for (size_t i = 0; i < matches_.size(); ++i)
 122     matches_[i].relevance = kRelevance + matches_.size() - (i + 1);
 123   if (!HistoryProvider::PreventInlineAutocomplete(input) &&
 124       (matches_.size() == 1)) {
 125     // If there's only one possible completion of the user's input and
 126     // allowing completions is okay, give the match a high enough score to
 127     // allow it to beat url-what-you-typed and be inlined.
 128     matches_[0].relevance = 1250;
 129     matches_[0].allowed_to_be_default_match = true;
 130   }
 131 }
 132
 133 BuiltinProvider::~BuiltinProvider() {}
 134
 135 void BuiltinProvider::AddMatch(const base::string16& match_string,
 136                                const base::string16& inline_completion,
 137                                const ACMatchClassifications& styles) {
 138   AutocompleteMatch match(this, kRelevance, false,
 139                           AutocompleteMatchType::NAVSUGGEST);
 140   match.fill_into_edit = match_string;
 141   match.inline_autocompletion = inline_completion;
 142   match.destination_url = GURL(match_string);
 143   match.contents = match_string;
 144   match.contents_class = styles;
 145   matches_.push_back(match);
 146 }