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/autocomplete/url_prefix.h"
7 #include "base/basictypes.h"
8 #include "base/strings/string_util.h"
9 #include "base/strings/utf_string_conversions.h"
13 // Like URLPrefix::BestURLPrefix() except also handles the prefix of
15 const URLPrefix* BestURLPrefixWithWWWCase(
16 const base::string16& text,
17 const base::string16& prefix_suffix) {
18 CR_DEFINE_STATIC_LOCAL(URLPrefix, www_prefix,
19 (base::ASCIIToUTF16("www."), 1));
20 const URLPrefix* best_prefix = URLPrefix::BestURLPrefix(text, prefix_suffix);
21 if ((best_prefix == NULL) ||
22 (best_prefix->num_components < www_prefix.num_components)) {
23 if (URLPrefix::PrefixMatch(www_prefix, text, prefix_suffix))
24 best_prefix = &www_prefix;
31 URLPrefix::URLPrefix(const base::string16& prefix, size_t num_components)
33 num_components(num_components) {
37 const URLPrefixes& URLPrefix::GetURLPrefixes() {
38 CR_DEFINE_STATIC_LOCAL(URLPrefixes, prefixes, ());
39 if (prefixes.empty()) {
40 prefixes.push_back(URLPrefix(base::ASCIIToUTF16("https://www."), 2));
41 prefixes.push_back(URLPrefix(base::ASCIIToUTF16("http://www."), 2));
42 prefixes.push_back(URLPrefix(base::ASCIIToUTF16("ftp://ftp."), 2));
43 prefixes.push_back(URLPrefix(base::ASCIIToUTF16("ftp://www."), 2));
44 prefixes.push_back(URLPrefix(base::ASCIIToUTF16("https://"), 1));
45 prefixes.push_back(URLPrefix(base::ASCIIToUTF16("http://"), 1));
46 prefixes.push_back(URLPrefix(base::ASCIIToUTF16("ftp://"), 1));
47 prefixes.push_back(URLPrefix(base::string16(), 0));
53 bool URLPrefix::IsURLPrefix(const base::string16& prefix) {
54 const URLPrefixes& list = GetURLPrefixes();
55 for (URLPrefixes::const_iterator i = list.begin(); i != list.end(); ++i)
56 if (i->prefix == prefix)
62 const URLPrefix* URLPrefix::BestURLPrefix(const base::string16& text,
63 const base::string16& prefix_suffix) {
64 const URLPrefixes& list = GetURLPrefixes();
65 for (URLPrefixes::const_iterator i = list.begin(); i != list.end(); ++i)
66 if (PrefixMatch(*i, text, prefix_suffix))
72 bool URLPrefix::PrefixMatch(const URLPrefix& prefix,
73 const base::string16& text,
74 const base::string16& prefix_suffix) {
75 return StartsWith(text, prefix.prefix + prefix_suffix, false);
79 size_t URLPrefix::GetInlineAutocompleteOffset(
80 const base::string16& input,
81 const base::string16& fixed_up_input,
82 const bool allow_www_prefix_without_scheme,
83 const base::string16& text) {
84 const URLPrefix* best_prefix = allow_www_prefix_without_scheme ?
85 BestURLPrefixWithWWWCase(text, input) : BestURLPrefix(text, input);
86 const base::string16* matching_string = &input;
87 // If we failed to find a best_prefix initially, try again using a fixed-up
88 // version of the user input. This is especially useful to get about: URLs
89 // to inline against chrome:// shortcuts. (about: URLs are fixed up to the
91 if (!best_prefix && !fixed_up_input.empty() && (fixed_up_input != input)) {
92 best_prefix = allow_www_prefix_without_scheme ?
93 BestURLPrefixWithWWWCase(text, fixed_up_input) :
94 BestURLPrefix(text, fixed_up_input);
95 matching_string = &fixed_up_input;
97 return (best_prefix != NULL) ?
98 (best_prefix->prefix.length() + matching_string->length()) :