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