1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "core/common/ime/text_input_formatter.h"
17
18 #include "base/utils/macros.h"
19 #include "base/utils/string_utils.h"
20 #include "core/common/ime/text_editing_value.h"
21
22 namespace OHOS::Ace {
23
BlackListCharsFormatter(std::wregex && regex)24 BlackListCharsFormatter::BlackListCharsFormatter(std::wregex&& regex) : regex_(regex) {}
25
Format(const TextEditingValue & oldValue,TextEditingValue & newValue) const26 void BlackListCharsFormatter::Format(const TextEditingValue& oldValue, TextEditingValue& newValue) const
27 {
28 newValue.SelectionAwareTextManipulation(
29 [this](std::wstring& manipulateText) { manipulateText = std::regex_replace(manipulateText, regex_, L""); });
30 }
31
32 // Only allow \d.-e
NumberFormatter()33 NumberFormatter::NumberFormatter() : BlackListCharsFormatter(std::wregex(L"[^\\d.\\-e]+")) {}
34
35 // Only allow \d-+
PhoneNumberFormatter()36 PhoneNumberFormatter::PhoneNumberFormatter() : BlackListCharsFormatter(std::wregex(L"[^\\d\\-\\+\\*\\#]+")) {}
37
38 // Use Common specifications
EmailFormatter()39 EmailFormatter::EmailFormatter()
40 : BlackListCharsFormatter(std::wregex(L"^([0-9a-zA-Z]+[-._+&])*[0-9a-zA-Z]+@([-0-9a-zA-Z]+[.])+[a-zA-Z]{1,}$"))
41 {}
42
43 // Allow \d\w-_.~!*'();:@&=+$,/?#[]
UriFormatter()44 UriFormatter::UriFormatter() : BlackListCharsFormatter(std::wregex(L"[^\\d\\w-_.~!*'();:@&=+$,/?#[\\]]+")) {}
45
SingleLineFormatter()46 SingleLineFormatter::SingleLineFormatter() : BlackListCharsFormatter(std::wregex(L"\n")) {}
47
Format(const TextEditingValue & oldValue,TextEditingValue & newValue) const48 void LengthLimitingFormatter::Format(const TextEditingValue& oldValue, TextEditingValue& newValue) const
49 {
50 auto text = newValue.GetWideText();
51 if (text.length() > limit_) {
52 int32_t exceedLen = static_cast<int32_t>(text.length()) - static_cast<int32_t>(limit_);
53 int32_t removeBeforeExtent = std::min(exceedLen, newValue.selection.extentOffset);
54 int32_t removeAfterExtent = exceedLen - removeBeforeExtent;
55 if (removeBeforeExtent > 0) {
56 int32_t eraseStart = newValue.selection.extentOffset - removeBeforeExtent;
57 int32_t preCharIndex = eraseStart - 1;
58 if (preCharIndex >= 0 && preCharIndex < static_cast<int32_t>(text.length()) &&
59 StringUtils::NotInBmp(text[preCharIndex])) {
60 --eraseStart;
61 ++exceedLen;
62 ++removeBeforeExtent;
63 }
64 if (static_cast<size_t>(eraseStart + exceedLen) > text.length()) {
65 return;
66 }
67 text.erase(eraseStart, removeBeforeExtent);
68 newValue.selection.Update(eraseStart);
69 }
70 if (removeAfterExtent > 0) {
71 int32_t eraseStart = text.length() - removeAfterExtent;
72 auto preCharIndex = eraseStart - 1;
73 if (preCharIndex >= 0 && preCharIndex < static_cast<int32_t>(text.length()) &&
74 StringUtils::NotInBmp(text[preCharIndex])) {
75 --eraseStart;
76 }
77 if (eraseStart >= 0 && (static_cast<int32_t>(text.length()) - eraseStart > 0)) {
78 text.erase(eraseStart);
79 }
80 }
81 if (exceedLen > 0) {
82 newValue.text = StringUtils::ToString(text);
83 }
84 }
85 }
86
87 } // namespace OHOS::Ace
88