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