1 // Copyright 2014 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.
5 #include "components/omnibox/autocomplete_provider.h"
7 #include "base/logging.h"
8 #include "base/strings/utf_string_conversions.h"
9 #include "components/omnibox/autocomplete_input.h"
10 #include "components/omnibox/autocomplete_match.h"
11 #include "components/url_fixer/url_fixer.h"
12 #include "net/base/net_util.h"
16 const size_t AutocompleteProvider::kMaxMatches = 3;
18 AutocompleteProvider::AutocompleteProvider(Type type)
24 const char* AutocompleteProvider::TypeToString(Type type) {
30 case TYPE_HISTORY_QUICK:
31 return "HistoryQuick";
32 case TYPE_HISTORY_URL:
40 case TYPE_ZERO_SUGGEST:
43 NOTREACHED() << "Unhandled AutocompleteProvider::Type " << type;
48 void AutocompleteProvider::Stop(bool clear_cached_results) {
52 const char* AutocompleteProvider::GetName() const {
53 return TypeToString(type_);
56 metrics::OmniboxEventProto_ProviderType AutocompleteProvider::
57 AsOmniboxEventProviderType() const {
60 return metrics::OmniboxEventProto::BOOKMARK;
62 return metrics::OmniboxEventProto::BUILTIN;
63 case TYPE_HISTORY_QUICK:
64 return metrics::OmniboxEventProto::HISTORY_QUICK;
65 case TYPE_HISTORY_URL:
66 return metrics::OmniboxEventProto::HISTORY_URL;
68 return metrics::OmniboxEventProto::KEYWORD;
70 return metrics::OmniboxEventProto::SEARCH;
72 return metrics::OmniboxEventProto::SHORTCUTS;
73 case TYPE_ZERO_SUGGEST:
74 return metrics::OmniboxEventProto::ZERO_SUGGEST;
76 NOTREACHED() << "Unhandled AutocompleteProvider::Type " << type_;
77 return metrics::OmniboxEventProto::UNKNOWN_PROVIDER;
81 void AutocompleteProvider::DeleteMatch(const AutocompleteMatch& match) {
82 DLOG(WARNING) << "The AutocompleteProvider '" << GetName()
83 << "' has not implemented DeleteMatch.";
86 void AutocompleteProvider::AddProviderInfo(ProvidersInfo* provider_info) const {
89 void AutocompleteProvider::ResetSession() {
92 AutocompleteProvider::~AutocompleteProvider() {
97 AutocompleteProvider::FixupReturn AutocompleteProvider::FixupUserInput(
98 const AutocompleteInput& input) {
99 const base::string16& input_text = input.text();
100 const FixupReturn failed(false, input_text);
102 // Fixup and canonicalize user input.
103 const GURL canonical_gurl(
104 url_fixer::FixupURL(base::UTF16ToUTF8(input_text), std::string()));
105 std::string canonical_gurl_str(canonical_gurl.possibly_invalid_spec());
106 if (canonical_gurl_str.empty()) {
107 // This probably won't happen, but there are no guarantees.
111 // If the user types a number, GURL will convert it to a dotted quad.
112 // However, if the parser did not mark this as a URL, then the user probably
113 // didn't intend this interpretation. Since this can break history matching
114 // for hostname beginning with numbers (e.g. input of "17173" will be matched
115 // against "0.0.67.21" instead of the original "17173", failing to find
116 // "17173.com"), swap the original hostname in for the fixed-up one.
117 if ((input.type() != metrics::OmniboxInputType::URL) &&
118 canonical_gurl.HostIsIPAddress()) {
119 std::string original_hostname =
120 base::UTF16ToUTF8(input_text.substr(input.parts().host.begin,
121 input.parts().host.len));
122 const url::Parsed& parts =
123 canonical_gurl.parsed_for_possibly_invalid_spec();
124 // parts.host must not be empty when HostIsIPAddress() is true.
125 DCHECK(parts.host.is_nonempty());
126 canonical_gurl_str.replace(parts.host.begin, parts.host.len,
129 base::string16 output(base::UTF8ToUTF16(canonical_gurl_str));
130 // Don't prepend a scheme when the user didn't have one. Since the fixer
131 // upper only prepends the "http" scheme, that's all we need to check for.
132 if (!AutocompleteInput::HasHTTPScheme(input_text))
133 TrimHttpPrefix(&output);
135 // Make the number of trailing slashes on the output exactly match the input.
136 // Examples of why not doing this would matter:
137 // * The user types "a" and has this fixed up to "a/". Now no other sites
138 // beginning with "a" will match.
139 // * The user types "file:" and has this fixed up to "file://". Now inline
140 // autocomplete will append too few slashes, resulting in e.g. "file:/b..."
141 // instead of "file:///b..."
142 // * The user types "http:/" and has this fixed up to "http:". Now inline
143 // autocomplete will append too many slashes, resulting in e.g.
144 // "http:///c..." instead of "http://c...".
145 // NOTE: We do this after calling TrimHttpPrefix() since that can strip
146 // trailing slashes (if the scheme is the only thing in the input). It's not
147 // clear that the result of fixup really matters in this case, but there's no
148 // harm in making sure.
149 const size_t last_input_nonslash =
150 input_text.find_last_not_of(base::ASCIIToUTF16("/\\"));
151 const size_t num_input_slashes =
152 (last_input_nonslash == base::string16::npos) ?
153 input_text.length() : (input_text.length() - 1 - last_input_nonslash);
154 const size_t last_output_nonslash =
155 output.find_last_not_of(base::ASCIIToUTF16("/\\"));
156 const size_t num_output_slashes =
157 (last_output_nonslash == base::string16::npos) ?
158 output.length() : (output.length() - 1 - last_output_nonslash);
159 if (num_output_slashes < num_input_slashes)
160 output.append(num_input_slashes - num_output_slashes, '/');
161 else if (num_output_slashes > num_input_slashes)
162 output.erase(output.length() - num_output_slashes + num_input_slashes);
166 return FixupReturn(true, output);
170 size_t AutocompleteProvider::TrimHttpPrefix(base::string16* url) {
172 if (!AutocompleteInput::HasHTTPScheme(*url))
175 url->find(base::ASCIIToUTF16(url::kHttpScheme) + base::char16(':'));
176 DCHECK_NE(base::string16::npos, scheme_pos);
178 // Erase scheme plus up to two slashes.
179 size_t prefix_end = scheme_pos + strlen(url::kHttpScheme) + 1;
180 const size_t after_slashes = std::min(url->length(), prefix_end + 2);
181 while ((prefix_end < after_slashes) && ((*url)[prefix_end] == '/'))
183 url->erase(scheme_pos, prefix_end - scheme_pos);
184 return (scheme_pos == 0) ? prefix_end : 0;