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// 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/metrics/field_trial.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::CaseInsensitiveCompareASCII<Char> {
explicit Compare(bool case_sensitive) : case_sensitive_(case_sensitive) {}
bool operator()(Char x, Char y) const {
return case_sensitive_ ? (x == y)
: base::CaseInsensitiveCompareASCII<Char>::
operator()(x, y);
}
private:
bool case_sensitive_;
};
} // namespace
bool IsFeatureSubstringMatchEnabled() {
return base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kEnableSuggestionsWithSubstringMatch);
}
bool IsKeyboardAccessoryEnabled() {
#if defined(OS_ANDROID)
return base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kEnableAccessorySuggestionView) ||
(base::FieldTrialList::FindFullName("AutofillKeyboardAccessory") ==
"Enabled" &&
!base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisableAccessorySuggestionView));
#else // !defined(OS_ANDROID)
return false;
#endif
}
bool FieldIsSuggestionSubstringStartingOnTokenBoundary(
const base::string16& suggestion,
const base::string16& field_contents,
bool case_sensitive) {
if (!IsFeatureSubstringMatchEnabled()) {
return base::StartsWith(suggestion, field_contents,
case_sensitive
? base::CompareCase::SENSITIVE
: base::CompareCase::INSENSITIVE_ASCII);
}
return 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);
// 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.
for (base::string16::const_iterator it = suggestion.begin();
(it = std::search(
it, suggestion.end(), field_contents.begin(), field_contents.end(),
Compare<base::string16::value_type>(case_sensitive))) !=
suggestion.end();
++it) {
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();
}
}
// Unable to find the |field_contents| in |suggestion| text.
return base::string16::npos;
}
bool IsDesktopPlatform() {
#if defined(OS_ANDROID) || defined(OS_IOS)
return false;
#else
return true;
#endif
}
} // namespace autofill
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