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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 const base::string16 kSplitCharacters = base::ASCIIToUTF16(" .,-_@"); | |
21 | |
22 } // namespace | |
23 | |
24 bool IsFeatureSubstringMatchEnabled() { | |
25 return base::CommandLine::ForCurrentProcess()->HasSwitch( | |
26 switches::kEnableSuggestionsWithSubstringMatch); | |
27 } | |
28 | |
29 bool IsContentsPrefixOfSuggestionToken(const base::string16& suggestion, | |
30 const base::string16& field_contents, | |
31 bool case_sensitive) { | |
32 if (!IsFeatureSubstringMatchEnabled()) | |
33 return false; | |
34 | |
35 std::vector<base::string16> suggestion_tokens; | |
36 Tokenize(suggestion, kSplitCharacters, &suggestion_tokens); | |
37 | |
38 // Check whether the |field_contents| prefixes any of the |suggestion|'s | |
39 // token. | |
40 for (const base::string16& token : suggestion_tokens) { | |
41 if (StartsWith(token, field_contents, case_sensitive)) | |
42 return true; | |
43 } | |
44 | |
45 return false; | |
46 } | |
47 | |
48 size_t GetTextSelectionStart(const base::string16& suggestion, | |
49 const base::string16& field_contents) { | |
50 size_t offset = 0; | |
51 // Loop until we find either the |field_contents| begins with the |suggestion| | |
52 // or character right before |offset| is one of the splitting characters. | |
53 for (base::string16::const_iterator it = suggestion.begin(); | |
54 (it = std::search( | |
55 offset + suggestion.begin(), suggestion.end(), | |
56 field_contents.begin(), field_contents.end(), | |
57 base::CaseInsensitiveCompare<base::string16::value_type>())) != | |
58 suggestion.end();) { | |
59 offset = it - suggestion.begin(); | |
60 if (offset == 0 || | |
61 ContainsOnlyChars(suggestion.substr(offset - 1, 1), kSplitCharacters)) { | |
62 // Set caret position to the end of the |field_contents|. | |
63 offset += field_contents.size(); | |
64 return offset; | |
65 } | |
66 | |
67 // Search didn't meet the criteria, advance the suggestion range. | |
68 ++offset; | |
69 } | |
70 | |
71 // Unable to find the |field_contents| in |suggestion| text. | |
Evan Stade
2015/05/22 18:26:48
notreached()
Pritam Nikam
2015/05/25 18:14:52
Done.
| |
72 return base::string16::npos; | |
73 } | |
74 | |
75 } // namespace autofill | |
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