Index: components/autofill/core/common/autofill_util.cc |
diff --git a/components/autofill/core/common/autofill_util.cc b/components/autofill/core/common/autofill_util.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..ea49ed5c3d22c5fafae5df3484dc7bdae64648f4 |
--- /dev/null |
+++ b/components/autofill/core/common/autofill_util.cc |
@@ -0,0 +1,82 @@ |
+// Copyright 2015 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/autofill/core/common/autofill_util.h" |
+ |
+#include <algorithm> |
+#include <vector> |
+ |
+#include "base/command_line.h" |
+#include "base/i18n/case_conversion.h" |
+#include "base/strings/string_piece.h" |
+#include "base/strings/string_split.h" |
+#include "base/strings/string_util.h" |
+#include "base/strings/utf_string_conversions.h" |
+#include "components/autofill/core/common/autofill_switches.h" |
+ |
+namespace autofill { |
+ |
+namespace { |
+ |
+const char kSplitCharacters[] = " .,-_@"; |
+ |
+template <typename Char> |
+struct Compare : base::CaseInsensitiveCompare<Char> { |
+ explicit Compare(bool case_sensitive) : case_sensitive_(case_sensitive) {} |
+ bool operator()(Char x, Char y) const { |
+ return case_sensitive_ ? (x == y) : base::CaseInsensitiveCompare<Char>:: |
+ operator()(x, y); |
+ } |
+ |
+ private: |
+ bool case_sensitive_; |
+}; |
+ |
+} // namespace |
+ |
+bool IsFeatureSubstringMatchEnabled() { |
+ return base::CommandLine::ForCurrentProcess()->HasSwitch( |
+ switches::kEnableSuggestionsWithSubstringMatch); |
+} |
+ |
+bool FieldIsSuggestionSubstringStartingOnTokenBoundary( |
+ const base::string16& suggestion, |
+ const base::string16& field_contents, |
+ bool case_sensitive) { |
+ return IsFeatureSubstringMatchEnabled() && |
+ suggestion.length() >= field_contents.length() && |
+ GetTextSelectionStart(suggestion, field_contents, case_sensitive) != |
+ base::string16::npos; |
+} |
+ |
+size_t GetTextSelectionStart(const base::string16& suggestion, |
+ const base::string16& field_contents, |
+ bool case_sensitive) { |
+ const base::string16 kSplitChars = base::ASCIIToUTF16(kSplitCharacters); |
+ base::string16::const_iterator it = suggestion.begin(); |
+ |
+ // Loop until we find either the |field_contents| is a prefix of |suggestion| |
+ // or character right before the match is one of the splitting characters. |
+ do { |
+ it = std::search(it, suggestion.end(), field_contents.begin(), |
+ field_contents.end(), |
+ Compare<base::string16::value_type>(case_sensitive)); |
+ if (it == suggestion.end()) |
+ break; |
vabr (Chromium)
2015/07/13 14:04:26
nit: Why not just
return base::string16::npos;
Pritam Nikam
2015/07/14 10:30:07
Restored to for(...) instead.
|
+ |
+ if (it == suggestion.begin() || |
+ kSplitChars.find(*(it - 1)) != std::string::npos) { |
+ // Returns the character position right after the |field_contents| within |
+ // |suggestion| text as a caret position for text selection. |
+ return it - suggestion.begin() + field_contents.size(); |
+ } |
+ |
+ ++it; |
+ } while (it != suggestion.end()); |
+ |
+ // Unable to find the |field_contents| in |suggestion| text. |
+ return base::string16::npos; |
+} |
+ |
+} // namespace autofill |