1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/omnibox/browser/builtin_provider.h"
#include <stddef.h>
#include <algorithm>
#include <string>
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "components/omnibox/browser/autocomplete_input.h"
#include "components/omnibox/browser/autocomplete_provider_client.h"
#include "components/omnibox/browser/history_provider.h"
#include "components/url_formatter/url_fixer.h"
#include "third_party/metrics_proto/omnibox_input_type.pb.h"
const int BuiltinProvider::kRelevance = 860;
BuiltinProvider::BuiltinProvider(AutocompleteProviderClient* client)
: AutocompleteProvider(AutocompleteProvider::TYPE_BUILTIN),
client_(client) {
builtins_ = client_->GetBuiltinURLs();
}
void BuiltinProvider::Start(const AutocompleteInput& input,
bool minimal_changes) {
matches_.clear();
if (input.from_omnibox_focus() ||
(input.type() == metrics::OmniboxInputType::INVALID) ||
(input.type() == metrics::OmniboxInputType::QUERY))
return;
const size_t kAboutSchemeLength = strlen(url::kAboutScheme);
const base::string16 kAbout =
base::ASCIIToUTF16(url::kAboutScheme) +
base::ASCIIToUTF16(url::kStandardSchemeSeparator);
const base::string16 embedderAbout =
base::UTF8ToUTF16(client_->GetEmbedderRepresentationOfAboutScheme()) +
base::ASCIIToUTF16(url::kStandardSchemeSeparator);
const int kUrl = ACMatchClassification::URL;
const int kMatch = kUrl | ACMatchClassification::MATCH;
const base::string16 text = input.text();
bool starting_about = base::StartsWith(embedderAbout, text,
base::CompareCase::INSENSITIVE_ASCII);
if (starting_about ||
base::StartsWith(kAbout, text, base::CompareCase::INSENSITIVE_ASCII)) {
ACMatchClassifications styles;
// Highlight the input portion matching |embedderAbout|; or if the user has
// input "about:" (with optional slashes), highlight the whole
// |embedderAbout|.
bool highlight = starting_about || text.length() > kAboutSchemeLength;
styles.push_back(ACMatchClassification(0, highlight ? kMatch : kUrl));
size_t offset = starting_about ? text.length() : embedderAbout.length();
if (highlight)
styles.push_back(ACMatchClassification(offset, kUrl));
// Include some common builtin URLs as the user types the scheme.
for (base::string16 url : client_->GetBuiltinsToProvideAsUserTypes())
AddMatch(url, base::string16(), styles);
} else {
// Match input about: or |embedderAbout| URL input against builtin URLs.
GURL url = url_formatter::FixupURL(base::UTF16ToUTF8(text), std::string());
const bool text_ends_with_slash =
base::EndsWith(text, base::ASCIIToUTF16("/"),
base::CompareCase::SENSITIVE);
// BuiltinProvider doesn't know how to suggest valid ?query or #fragment
// extensions to builtin URLs.
if (url.SchemeIs(client_->GetEmbedderRepresentationOfAboutScheme()) &&
url.has_host() && !url.has_query() && !url.has_ref()) {
// Suggest about:blank for substrings, taking URL fixup into account.
// Chrome does not support trailing slashes or paths for about:blank.
const base::string16 blank_host = base::ASCIIToUTF16("blank");
const base::string16 host = base::UTF8ToUTF16(url.host());
if (base::StartsWith(text, base::ASCIIToUTF16(url::kAboutScheme),
base::CompareCase::INSENSITIVE_ASCII) &&
base::StartsWith(blank_host, host,
base::CompareCase::INSENSITIVE_ASCII) &&
(url.path().length() <= 1) && !text_ends_with_slash) {
ACMatchClassifications styles;
styles.push_back(ACMatchClassification(0, kMatch));
base::string16 match = base::ASCIIToUTF16(url::kAboutBlankURL);
// Measure the length of the matching host after the "about:" scheme.
const size_t corrected_length = kAboutSchemeLength + 1 + host.length();
if (blank_host.length() > host.length())
styles.push_back(ACMatchClassification(corrected_length, kUrl));
AddMatch(match, match.substr(corrected_length), styles);
}
// Include the path for sub-pages (e.g. "chrome://settings/browser").
base::string16 host_and_path = base::UTF8ToUTF16(url.host() + url.path());
base::TrimString(host_and_path, base::ASCIIToUTF16("/"), &host_and_path);
size_t match_length = embedderAbout.length() + host_and_path.length();
for (Builtins::const_iterator i(builtins_.begin());
(i != builtins_.end()) && (matches_.size() < kMaxMatches); ++i) {
if (base::StartsWith(*i, host_and_path,
base::CompareCase::INSENSITIVE_ASCII)) {
ACMatchClassifications styles;
// Highlight |embedderAbout|, even for input "about:foo".
styles.push_back(ACMatchClassification(0, kMatch));
base::string16 match_string = embedderAbout + *i;
if (match_string.length() > match_length)
styles.push_back(ACMatchClassification(match_length, kUrl));
// FixupURL() may have dropped a trailing slash on the user's input.
// Ensure that in that case, we don't inline autocomplete unless the
// autocompletion restores the slash. This prevents us from e.g.
// trying to add a 'y' to an input like "chrome://histor/".
base::string16 inline_autocompletion(
match_string.substr(match_length));
if (text_ends_with_slash && !base::StartsWith(
match_string.substr(match_length), base::ASCIIToUTF16("/"),
base::CompareCase::INSENSITIVE_ASCII))
inline_autocompletion = base::string16();
AddMatch(match_string, inline_autocompletion, styles);
}
}
}
}
// Provide a relevance score for each match.
for (size_t i = 0; i < matches_.size(); ++i)
matches_[i].relevance = kRelevance + matches_.size() - (i + 1);
// If allowing completions is okay and there's a match that's considered
// appropriate to be the default match, mark it as such and give it a high
// enough score to beat url-what-you-typed.
size_t default_match_index;
if (!HistoryProvider::PreventInlineAutocomplete(input) &&
HasMatchThatShouldBeDefault(&default_match_index)) {
matches_[default_match_index].relevance = 1250;
matches_[default_match_index].allowed_to_be_default_match = true;
}
}
BuiltinProvider::~BuiltinProvider() {}
void BuiltinProvider::AddMatch(const base::string16& match_string,
const base::string16& inline_completion,
const ACMatchClassifications& styles) {
AutocompleteMatch match(this, kRelevance, false,
AutocompleteMatchType::NAVSUGGEST);
match.fill_into_edit = match_string;
match.inline_autocompletion = inline_completion;
match.destination_url = GURL(match_string);
match.contents = match_string;
match.contents_class = styles;
matches_.push_back(match);
}
bool BuiltinProvider::HasMatchThatShouldBeDefault(size_t* index) const {
if (matches_.size() == 0)
return false;
// If there's only one possible completion of the user's input and it's not
// empty, it should be allowed to be the default match.
if (matches_.size() == 1) {
*index = 0;
return !matches_[0].inline_autocompletion.empty();
}
// If there's a non-empty completion that is a prefix of all of the others,
// it should be allowed to be the default match.
size_t shortest = 0;
for (size_t i = 1; i < matches_.size(); ++i) {
if (matches_[i].contents.length() < matches_[shortest].contents.length())
shortest = i;
}
if (matches_[shortest].inline_autocompletion.empty())
return false;
for (size_t i = 0; i < matches_.size(); ++i) {
if (!base::StartsWith(matches_[i].contents, matches_[shortest].contents,
base::CompareCase::INSENSITIVE_ASCII)) {
return false;
}
}
*index = shortest;
return true;
}
|
