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 #if !defined(OS_ANDROID)
  19 // This list should be kept in sync with chrome/common/url_constants.h.
  20 // Only include useful sub-pages, confirmation alerts are not useful.
  21 const char* const kChromeSettingsSubPages[] = {
  22   chrome::kAutofillSubPage,
  23   chrome::kClearBrowserDataSubPage,
  24   chrome::kContentSettingsSubPage,
  25   chrome::kContentSettingsExceptionsSubPage,
  26   chrome::kImportDataSubPage,
  27   chrome::kLanguageOptionsSubPage,
  28   chrome::kPasswordManagerSubPage,
  29   chrome::kResetProfileSettingsSubPage,
  30   chrome::kSearchEnginesSubPage,
  31   chrome::kSyncSetupSubPage,
  32 #if defined(OS_CHROMEOS)
  33   chrome::kInternetOptionsSubPage,
  34 #endif
  35 };
  36 #endif // !defined(OS_ANDROID)
  37
  38 }  // namespace
  39
  40 const int BuiltinProvider::kRelevance = 860;
  41
  42 BuiltinProvider::BuiltinProvider(AutocompleteProviderListener* listener,
  43                                  Profile* profile)
  44     : AutocompleteProvider(listener, profile,
  45           AutocompleteProvider::TYPE_BUILTIN) {
  46   std::vector<std::string> builtins(
  47       chrome::kChromeHostURLs,
  48       chrome::kChromeHostURLs + chrome::kNumberOfChromeHostURLs);
  49   std::sort(builtins.begin(), builtins.end());
  50   for (std::vector<std::string>::iterator i(builtins.begin());
  51        i != builtins.end(); ++i)
  52     builtins_.push_back(base::ASCIIToUTF16(*i));
  53
  54 #if !defined(OS_ANDROID)
  55   base::string16 settings(base::ASCIIToUTF16(chrome::kChromeUISettingsHost) +
  56                           base::ASCIIToUTF16("/"));
  57   for (size_t i = 0; i < arraysize(kChromeSettingsSubPages); i++) {
  58     builtins_.push_back(
  59         settings + base::ASCIIToUTF16(kChromeSettingsSubPages[i]));
  60   }
  61 #endif
  62 }
  63
  64 void BuiltinProvider::Start(const AutocompleteInput& input,
  65                             bool minimal_changes) {
  66   matches_.clear();
  67   if ((input.type() == AutocompleteInput::INVALID) ||
  68       (input.type() == AutocompleteInput::FORCED_QUERY) ||
  69       (input.type() == AutocompleteInput::QUERY))
  70     return;
  71
  72   const base::string16 kAbout = base::ASCIIToUTF16(content::kAboutScheme) +
  73       base::ASCIIToUTF16(content::kStandardSchemeSeparator);
  74   const base::string16 kChrome = base::ASCIIToUTF16(content::kChromeUIScheme) +
  75       base::ASCIIToUTF16(content::kStandardSchemeSeparator);
  76
  77   const int kUrl = ACMatchClassification::URL;
  78   const int kMatch = kUrl | ACMatchClassification::MATCH;
  79
  80   base::string16 text = input.text();
  81   bool starting_chrome = StartsWith(kChrome, text, false);
  82   if (starting_chrome || StartsWith(kAbout, text, false)) {
  83     ACMatchClassifications styles;
  84     // Highlight the input portion matching "chrome://"; or if the user has
  85     // input "about:" (with optional slashes), highlight the whole "chrome://".
  86     const size_t kAboutSchemeLength = strlen(content::kAboutScheme);
  87     bool highlight = starting_chrome || text.length() > kAboutSchemeLength;
  88     styles.push_back(ACMatchClassification(0, highlight ? kMatch : kUrl));
  89     size_t offset = starting_chrome ? text.length() : kChrome.length();
  90     if (highlight)
  91       styles.push_back(ACMatchClassification(offset, kUrl));
  92     // Include some common builtin chrome URLs as the user types the scheme.
  93     AddMatch(base::ASCIIToUTF16(chrome::kChromeUIChromeURLsURL),
  94              base::string16(), styles);
  95 #if !defined(OS_ANDROID)
  96     AddMatch(base::ASCIIToUTF16(chrome::kChromeUISettingsURL),
  97              base::string16(), styles);
  98 #endif
  99     AddMatch(base::ASCIIToUTF16(chrome::kChromeUIVersionURL),
 100              base::string16(), styles);
 101   } else {
 102     // Match input about: or chrome: URL input against builtin chrome URLs.
 103     GURL url = URLFixerUpper::FixupURL(base::UTF16ToUTF8(text), std::string());
 104     // BuiltinProvider doesn't know how to suggest valid ?query or #fragment
 105     // extensions to chrome: URLs.
 106     if (url.SchemeIs(content::kChromeUIScheme) && url.has_host() &&
 107         !url.has_query() && !url.has_ref()) {
 108       // Include the path for sub-pages (e.g. "chrome://settings/browser").
 109       base::string16 host_and_path = base::UTF8ToUTF16(url.host() + url.path());
 110       base::TrimString(host_and_path, base::ASCIIToUTF16("/").c_str(),
 111                        &host_and_path);
 112       size_t match_length = kChrome.length() + host_and_path.length();
 113       for (Builtins::const_iterator i(builtins_.begin());
 114           (i != builtins_.end()) && (matches_.size() < kMaxMatches); ++i) {
 115         if (StartsWith(*i, host_and_path, false)) {
 116           ACMatchClassifications styles;
 117           // Highlight the "chrome://" scheme, even for input "about:foo".
 118           styles.push_back(ACMatchClassification(0, kMatch));
 119           base::string16 match_string = kChrome + *i;
 120           if (match_string.length() > match_length)
 121             styles.push_back(ACMatchClassification(match_length, kUrl));
 122           AddMatch(match_string, match_string.substr(match_length), styles);
 123         }
 124       }
 125     }
 126   }
 127
 128   for (size_t i = 0; i < matches_.size(); ++i)
 129     matches_[i].relevance = kRelevance + matches_.size() - (i + 1);
 130   if (!HistoryProvider::PreventInlineAutocomplete(input) &&
 131       (matches_.size() == 1)) {
 132     // If there's only one possible completion of the user's input and
 133     // allowing completions is okay, give the match a high enough score to
 134     // allow it to beat url-what-you-typed and be inlined.
 135     matches_[0].relevance = 1250;
 136     matches_[0].allowed_to_be_default_match = true;
 137   }
 138 }
 139
 140 BuiltinProvider::~BuiltinProvider() {}
 141
 142 void BuiltinProvider::AddMatch(const base::string16& match_string,
 143                                const base::string16& inline_completion,
 144                                const ACMatchClassifications& styles) {
 145   AutocompleteMatch match(this, kRelevance, false,
 146                           AutocompleteMatchType::NAVSUGGEST);
 147   match.fill_into_edit = match_string;
 148   match.inline_autocompletion = inline_completion;
 149   match.destination_url = GURL(match_string);
 150   match.contents = match_string;
 151   match.contents_class = styles;
 152   matches_.push_back(match);
 153 }