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
BuiltinProvider(AutocompleteProviderListener * listener,Profile * profile)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(ASCIIToUTF16(*i));
50 base::string16 settings(ASCIIToUTF16(chrome::kChromeUISettingsHost) +
51 ASCIIToUTF16("/"));
52 for (size_t i = 0; i < arraysize(kChromeSettingsSubPages); i++)
53 builtins_.push_back(settings + ASCIIToUTF16(kChromeSettingsSubPages[i]));
54 }
55
Start(const AutocompleteInput & input,bool minimal_changes)56 void BuiltinProvider::Start(const AutocompleteInput& input,
57 bool minimal_changes) {
58 matches_.clear();
59 if ((input.type() == AutocompleteInput::INVALID) ||
60 (input.type() == AutocompleteInput::FORCED_QUERY) ||
61 (input.type() == AutocompleteInput::QUERY))
62 return;
63
64 const base::string16 kAbout = ASCIIToUTF16(chrome::kAboutScheme) +
65 ASCIIToUTF16(content::kStandardSchemeSeparator);
66 const base::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 base::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), base::string16(),
86 styles);
87 AddMatch(ASCIIToUTF16(chrome::kChromeUISettingsURL), base::string16(),
88 styles);
89 AddMatch(ASCIIToUTF16(chrome::kChromeUIVersionURL), base::string16(),
90 styles);
91 } else {
92 // Match input about: or chrome: URL input against builtin chrome URLs.
93 GURL url = URLFixerUpper::FixupURL(UTF16ToUTF8(text), std::string());
94 // BuiltinProvider doesn't know how to suggest valid ?query or #fragment
95 // extensions to chrome: URLs.
96 if (url.SchemeIs(chrome::kChromeUIScheme) && url.has_host() &&
97 !url.has_query() && !url.has_ref()) {
98 // Include the path for sub-pages (e.g. "chrome://settings/browser").
99 base::string16 host_and_path = UTF8ToUTF16(url.host() + url.path());
100 base::TrimString(host_and_path, ASCIIToUTF16("/").c_str(),
101 &host_and_path);
102 size_t match_length = kChrome.length() + host_and_path.length();
103 for (Builtins::const_iterator i(builtins_.begin());
104 (i != builtins_.end()) && (matches_.size() < kMaxMatches); ++i) {
105 if (StartsWith(*i, host_and_path, false)) {
106 ACMatchClassifications styles;
107 // Highlight the "chrome://" scheme, even for input "about:foo".
108 styles.push_back(ACMatchClassification(0, kMatch));
109 base::string16 match_string = kChrome + *i;
110 if (match_string.length() > match_length)
111 styles.push_back(ACMatchClassification(match_length, kUrl));
112 AddMatch(match_string, match_string.substr(match_length), styles);
113 }
114 }
115 }
116 }
117
118 for (size_t i = 0; i < matches_.size(); ++i)
119 matches_[i].relevance = kRelevance + matches_.size() - (i + 1);
120 if (!input.prevent_inline_autocomplete() && (matches_.size() == 1)) {
121 // If there's only one possible completion of the user's input and
122 // allowing completions is okay, give the match a high enough score to
123 // allow it to beat url-what-you-typed and be inlined.
124 matches_[0].relevance = 1250;
125 matches_[0].allowed_to_be_default_match = true;
126 }
127 }
128
~BuiltinProvider()129 BuiltinProvider::~BuiltinProvider() {}
130
AddMatch(const base::string16 & match_string,const base::string16 & inline_completion,const ACMatchClassifications & styles)131 void BuiltinProvider::AddMatch(const base::string16& match_string,
132 const base::string16& inline_completion,
133 const ACMatchClassifications& styles) {
134 AutocompleteMatch match(this, kRelevance, false,
135 AutocompleteMatchType::NAVSUGGEST);
136 match.fill_into_edit = match_string;
137 match.inline_autocompletion = inline_completion;
138 match.destination_url = GURL(match_string);
139 match.contents = match_string;
140 match.contents_class = styles;
141 matches_.push_back(match);
142 }
143