Yubico/yubioath-flutter
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Count UTF8 bytes for byte-limited text fields.

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This commit is contained in:
Dain Nilsson 2022-07-05 14:53:21 +02:00
parent 7ee5b82906
commit 662536140a
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GPG Key ID: F04367096FBA95E8
6 changed files with 41 additions and 4 deletions
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3
lib/fido/views/add_fingerprint_dialog.dart
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@ -10,6 +10,7 @@ import 'package:yubico_authenticator/app/logging.dart';
import '../../app/message.dart';
import '../../desktop/models.dart';
import '../../widgets/responsive_dialog.dart';
import '../../widgets/utf8_text_fields.dart';
import '../state.dart';
import '../../fido/models.dart';
import '../../app/models.dart';
@ -179,6 +180,8 @@ class _AddFingerprintDialogState extends ConsumerState<AddFingerprintDialog>
TextFormField(
focusNode: _nameFocus,
maxLength: 15,
inputFormatters: [limitBytesLength(15)],
buildCounter: buildCountersFor(_label),
autofocus: true,
decoration: InputDecoration(
enabled: _fingerprint != null,

4
lib/fido/views/rename_fingerprint_dialog.dart
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@ -4,6 +4,7 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../../app/message.dart';
import '../../desktop/models.dart';
import '../../widgets/responsive_dialog.dart';
import '../../widgets/utf8_text_fields.dart';
import '../models.dart';
import '../state.dart';
import '../../app/models.dart';
@ -69,8 +70,9 @@ class _RenameAccountDialogState extends ConsumerState<RenameFingerprintDialog> {
const Text('This will change the label of the fingerprint.'),
TextFormField(
initialValue: _label,
// TODO: Make this field count UTF-8 bytes instead of characters.
maxLength: 15,
inputFormatters: [limitBytesLength(15)],
buildCounter: buildCountersFor(_label),
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'Label',

7
lib/oath/views/add_account_page.dart
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@ -5,14 +5,15 @@ import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:logging/logging.dart';
import 'package:yubico_authenticator/app/logging.dart';
import '../../app/logging.dart';
import '../../app/message.dart';
import '../../app/models.dart';
import '../../app/state.dart';
import '../../desktop/models.dart';
import '../../widgets/file_drop_target.dart';
import '../../widgets/responsive_dialog.dart';
import '../../widgets/utf8_text_fields.dart';
import '../models.dart';
import '../state.dart';
import 'utils.dart';
@ -210,6 +211,8 @@ class _OathAddAccountPageState extends ConsumerState<OathAddAccountPage> {
autofocus: true,
enabled: issuerRemaining > 0,
maxLength: max(issuerRemaining, 1),
inputFormatters: [limitBytesLength(issuerRemaining)],
buildCounter: buildCountersFor(_issuerController.text),
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'Issuer (optional)',
@ -229,6 +232,8 @@ class _OathAddAccountPageState extends ConsumerState<OathAddAccountPage> {
key: const Key('name'),
controller: _accountController,
maxLength: max(nameRemaining, 1),
buildCounter: buildCountersFor(_accountController.text),
inputFormatters: [limitBytesLength(nameRemaining)],
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'Account name',

5
lib/oath/views/rename_account_dialog.dart
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@ -7,6 +7,7 @@ import '../../app/message.dart';
import '../../app/models.dart';
import '../../desktop/models.dart';
import '../../widgets/responsive_dialog.dart';
import '../../widgets/utf8_text_fields.dart';
import '../models.dart';
import '../state.dart';
import 'utils.dart';
@ -97,6 +98,8 @@ class _RenameAccountDialogState extends ConsumerState<RenameAccountDialog> {
initialValue: _issuer,
enabled: issuerRemaining > 0,
maxLength: issuerRemaining > 0 ? issuerRemaining : null,
buildCounter: buildCountersFor(_issuer),
inputFormatters: [limitBytesLength(issuerRemaining)],
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'Issuer (optional)',
@ -112,6 +115,8 @@ class _RenameAccountDialogState extends ConsumerState<RenameAccountDialog> {
TextFormField(
initialValue: _account,
maxLength: nameRemaining,
inputFormatters: [limitBytesLength(nameRemaining)],
buildCounter: buildCountersFor(_account),
decoration: InputDecoration(
border: const OutlineInputBorder(),
labelText: 'Account name',

5
lib/oath/views/utils.dart
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@ -1,3 +1,4 @@
import 'dart:convert';
import 'dart:math';
import '../models.dart';
@ -18,7 +19,7 @@ Pair<int, int> getRemainingKeySpace(
// Non-standard TOTP periods are stored as part of this data, as a "D/"- prefix.
remaining -= '$period/'.length;
}
int issuerSpace = issuer.length;
int issuerSpace = utf8.encode(issuer).length;
if (issuer.isNotEmpty) {
// Issuer is separated from name with a ":", if present.
issuerSpace += 1;
@ -26,7 +27,7 @@ Pair<int, int> getRemainingKeySpace(
return Pair(
// Always reserve at least one character for name
remaining - 1 - max(name.length, 1),
remaining - 1 - max(utf8.encode(name).length, 1),
remaining - issuerSpace,
);
}

21
lib/widgets/utf8_text_fields.dart Executable file
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@ -0,0 +1,21 @@
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
int _byteLength(String value) => utf8.encode(value).length;
InputCounterWidgetBuilder buildCountersFor(String currentValue) =>
(context, {required currentLength, required isFocused, maxLength}) => Text(
maxLength != null ? '${_byteLength(currentValue)}/$maxLength' : '',
style: Theme.of(context).textTheme.caption,
);
TextInputFormatter limitBytesLength(int maxByteLength) =>
TextInputFormatter.withFunction((oldValue, newValue) {
final newLength = _byteLength(newValue.text);
if (newLength <= maxByteLength) {
return newValue;
}
return oldValue;
});