builtin_provider.cc revision 558790d6acca3451cf3a6b497803a5f07d0bec58 
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
15namespace {
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.
19const 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
36const int BuiltinProvider::kRelevance = 860;
37
38BuiltinProvider::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
55void 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      (input.matches_requested() == AutocompleteInput::BEST_MATCH))
62    return;
63
64  const string16 kAbout = ASCIIToUTF16(chrome::kAboutScheme) +
65      ASCIIToUTF16(content::kStandardSchemeSeparator);
66  const string16 kChrome = ASCIIToUTF16(chrome::kChromeUIScheme) +
67      ASCIIToUTF16(content::kStandardSchemeSeparator);
68
69  const int kUrl = ACMatchClassification::URL;
70  const int kMatch = kUrl | ACMatchClassification::MATCH;
71
72  string16 text = input.text();
73  bool starting_chrome = StartsWith(kChrome, text, false);
74  if (starting_chrome || StartsWith(kAbout, text, false)) {
75    ACMatchClassifications styles;
76    // Highlight the input portion matching "chrome://"; or if the user has
77    // input "about:" (with optional slashes), highlight the whole "chrome://".
78    const size_t kAboutSchemeLength = strlen(chrome::kAboutScheme);
79    bool highlight = starting_chrome || text.length() > kAboutSchemeLength;
80    styles.push_back(ACMatchClassification(0, highlight ? kMatch : kUrl));
81    size_t offset = starting_chrome ? text.length() : kChrome.length();
82    if (highlight)
83      styles.push_back(ACMatchClassification(offset, kUrl));
84    // Include some common builtin chrome URLs as the user types the scheme.
85    AddMatch(ASCIIToUTF16(chrome::kChromeUIChromeURLsURL), styles);
86    AddMatch(ASCIIToUTF16(chrome::kChromeUISettingsURL), styles);
87    AddMatch(ASCIIToUTF16(chrome::kChromeUIVersionURL), styles);
88  } else {
89    // Match input about: or chrome: URL input against builtin chrome URLs.
90    GURL url = URLFixerUpper::FixupURL(UTF16ToUTF8(text), std::string());
91    if (url.SchemeIs(chrome::kChromeUIScheme) && url.has_host()) {
92      // Include the path for sub-pages (e.g. "chrome://settings/browser").
93      string16 host_and_path = UTF8ToUTF16(url.host() + url.path());
94      TrimString(host_and_path, ASCIIToUTF16("/").c_str(), &host_and_path);
95      size_t match_length = kChrome.length() + host_and_path.length();
96      for (Builtins::const_iterator i(builtins_.begin());
97          (i != builtins_.end()) && (matches_.size() < kMaxMatches); ++i) {
98        if (StartsWith(*i, host_and_path, false)) {
99          ACMatchClassifications styles;
100          // Highlight the "chrome://" scheme, even for input "about:foo".
101          styles.push_back(ACMatchClassification(0, kMatch));
102          string16 match_string = kChrome + *i;
103          if (match_string.length() > match_length)
104            styles.push_back(ACMatchClassification(match_length, kUrl));
105          AddMatch(match_string, styles);
106        }
107      }
108    }
109  }
110
111  for (size_t i = 0; i < matches_.size(); ++i)
112    matches_[i].relevance = kRelevance + matches_.size() - (i + 1);
113}
114
115BuiltinProvider::~BuiltinProvider() {}
116
117void BuiltinProvider::AddMatch(const string16& match_string,
118                               const ACMatchClassifications& styles) {
119  AutocompleteMatch match(this, kRelevance, false,
120                          AutocompleteMatchType::NAVSUGGEST);
121  match.fill_into_edit = match_string;
122  match.destination_url = GURL(match_string);
123  match.contents = match_string;
124  match.contents_class = styles;
125  matches_.push_back(match);
126}
127