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1 // Copyright 2015 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 "components/autofill/core/common/autofill_util.h" | |
6 | |
7 #include <vector> | |
8 | |
9 #include "base/command_line.h" | |
10 #include "base/i18n/case_conversion.h" | |
11 #include "base/strings/string_piece.h" | |
12 #include "base/strings/string_util.h" | |
13 #include "base/strings/utf_string_conversions.h" | |
14 #include "components/autofill/core/common/autofill_switches.h" | |
15 | |
16 namespace autofill { | |
17 | |
18 namespace { | |
19 | |
20 // Returns offset to the beginning of first occurence of |search| in the |str|. | |
21 // If no such subsequence is found, |base::string16::npos| is returned. | |
22 size_t StartsAt(const base::string16& str, const base::string16& search) { | |
23 base::string16::const_iterator it = | |
24 std::search(str.begin(), str.end(), search.begin(), search.end(), | |
25 base::CaseInsensitiveCompare<base::string16::value_type>()); | |
26 return (it != str.end()) ? (it - str.begin()) : base::string16::npos; | |
27 } | |
28 | |
29 } // namespace | |
30 | |
31 bool IsFeatureSubstringMatchEnabled() { | |
32 return base::CommandLine::ForCurrentProcess()->HasSwitch( | |
33 switches::kEnableSuggestionsWithSubstringMatch); | |
34 } | |
35 | |
36 bool IsContentsPrefixOfSuggestionToken(const base::string16& field_suggestion, | |
37 const base::string16& field_contents, | |
38 bool case_sensitive) { | |
39 if (!IsFeatureSubstringMatchEnabled()) { | |
40 return false; | |
41 } | |
42 | |
43 bool result = false; | |
44 std::vector<base::string16> suggestion_tokens; | |
45 Tokenize(field_suggestion, base::ASCIIToUTF16(" .,-_@"), &suggestion_tokens); | |
46 | |
47 // Check whether the |field_contents| prefixes any of the |field_suggestion|'s | |
48 // token. | |
49 for (auto token : suggestion_tokens) { | |
Evan Stade
2015/04/23 20:21:18
nit: don't use auto for simple types (like const b
Pritam Nikam
2015/04/27 07:53:41
Done.
| |
50 result = StartsWith(token, field_contents, case_sensitive); | |
51 if (result) | |
52 break; | |
53 } | |
54 | |
55 return result; | |
56 } | |
57 | |
58 size_t ComputeRange(const base::string16& field_suggestion, | |
59 const base::string16& field_contents, | |
60 size_t* start, | |
61 size_t* end) { | |
62 size_t offset = 0; | |
63 size_t next_offset = 0; | |
64 do { | |
Evan Stade
2015/04/23 20:21:18
please write this loop in a more orthodox way.
1.
Pritam Nikam
2015/04/27 07:53:41
Done.
Change this API to
size_t GetTextSelectio
| |
65 // Loop through until we find either the |field_contents| begins with the | |
66 // |suggestion| or character right before |offset| is one of the splitting | |
67 // characters. | |
68 base::string16 suggestion(field_suggestion.substr(next_offset)); | |
69 offset = StartsAt(suggestion, field_contents); | |
70 if (base::string16::npos != offset) { | |
71 next_offset = offset + next_offset + 1; | |
72 if ((offset == 0) || ContainsOnlyChars(suggestion.substr(offset - 1, 1), | |
73 base::ASCIIToUTF16(" .,-_@"))) { | |
74 offset = next_offset - 1; | |
75 *start = offset + field_contents.size(); | |
76 *end = field_suggestion.size(); | |
77 break; | |
78 } | |
79 } | |
80 } while (base::string16::npos != offset); | |
81 | |
82 return offset; | |
83 } | |
84 | |
85 } // namespace autofill | |
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