Mobile: Accessibility: Improve setting control accessibility

packages/app-mobile/components/Dropdown.tsx

@@ -23,6 +23,7 @@ interface DropdownProps {
 	headerStyle?: TextStyle;
 	itemStyle?: TextStyle;
 	disabled?: boolean;
+	accessibilityHint?: string;
 
 	labelTransform?: 'trim';
 	items: DropdownListItem[];
@@ -169,6 +170,7 @@ class Dropdown extends Component<DropdownProps, DropdownState> {
 				<TouchableOpacity
 					style={itemWrapperStyle}
 					accessibilityRole="menuitem"
+					accessibilityState={{ selected: item.value === this.props.selectedValue }}
 					key={key}
 					onPress={() => {
 						this.onCloseList();
@@ -209,12 +211,19 @@ class Dropdown extends Component<DropdownProps, DropdownState> {
 						style={headerWrapperStyle}
 						disabled={this.props.disabled}
 						onPress={this.onOpenList}
-						role='button'
+						accessibilityRole='button'
+						accessibilityHint={[this.props.accessibilityHint, _('Opens dropdown')].join(' ')}
 					>
 						<Text ellipsizeMode="tail" numberOfLines={1} style={headerStyle}>
 							{headerLabel}
 						</Text>
-						<Text style={headerArrowStyle}>{'▼'}</Text>
+						<Text
+							style={headerArrowStyle}
+							aria-hidden={true}
+							importantForAccessibility='no'
+							accessibilityElementsHidden={true}
+							accessibilityRole='image'
+						>{'▼'}</Text>
 					</TouchableOpacity>
 					{this.state.listVisible ? null : this.props.coverableChildrenRight}
 				</View>
@@ -237,11 +246,13 @@ class Dropdown extends Component<DropdownProps, DropdownState> {
 
 					<View
 						accessibilityRole='menu'
-						style={wrapperStyle}>
+						style={wrapperStyle}
+					>
 						<FlatList
 							ref={this.onListLoad}
 							style={itemListStyle}
 							data={this.props.items}
+							extraData={this.props.selectedValue}
 							renderItem={itemRenderer}
 							getItemLayout={(_data, index) => ({
 								length: itemHeight,

packages/app-mobile/components/screens/ConfigScreen/SettingComponent.tsx

@@ -10,6 +10,7 @@ import SettingsToggle from './SettingsToggle';
 import FileSystemPathSelector from './FileSystemPathSelector';
 import shim from '@joplin/lib/shim';
 import { themeStyle } from '../../global-style';
+import { useId } from 'react';
 
 interface Props {
 	settingId: string;
@@ -39,16 +40,19 @@ const SettingComponent: React.FunctionComponent<Props> = props => {
 	const descriptionComp = !settingDescription ? null : <Text style={styleSheet.settingDescriptionText}>{settingDescription}</Text>;
 	const containerStyle = props.styles.getContainerStyle(!!settingDescription);
 
+	const labelId = useId();
+
 	if (md.isEnum) {
 		const value = props.value?.toString();
 
 		const items = Setting.enumOptionsToValueLabels(md.options(), md.optionsOrder ? md.optionsOrder() : []);
+		const label = md.label();
 
 		return (
 			<View key={props.settingId} style={{ flexDirection: 'column', borderBottomWidth: 1, borderBottomColor: theme.dividerColor }}>
 				<View style={containerStyle}>
 					<Text key="label" style={styleSheet.settingText}>
-						{md.label()}
+						{label}
 					</Text>
 					<Dropdown
 						key="control"
@@ -69,6 +73,7 @@ const SettingComponent: React.FunctionComponent<Props> = props => {
 						onValueChange={(itemValue: string) => {
 							void props.updateSettingValue(props.settingId, itemValue);
 						}}
+						accessibilityHint={label}
 					/>
 				</View>
 				{descriptionComp}
@@ -90,15 +95,16 @@ const SettingComponent: React.FunctionComponent<Props> = props => {
 		const unitLabel = md.unitLabel ? md.unitLabel(props.value) : props.value;
 		const minimum = 'minimum' in md ? md.minimum : 0;
 		const maximum = 'maximum' in md ? md.maximum : 10;
+		const label = md.label();
 
 		// Note: Do NOT add the minimumTrackTintColor and maximumTrackTintColor props
 		// on the Slider as they are buggy and can crash the app on certain devices.
 		// https://github.com/laurent22/joplin/issues/2733
 		// https://github.com/react-native-community/react-native-slider/issues/161
 		return (
 			<View key={props.settingId} style={styleSheet.settingContainer}>
-				<Text key="label" style={styleSheet.settingText}>
-					{md.label()}
+				<Text key="label" style={styleSheet.settingText} nativeID={labelId}>
+					{label}
 				</Text>
 				<View style={{ display: 'flex', flexDirection: 'row', alignItems: 'center', flex: 1 }}>
 					<Text style={styleSheet.sliderUnits}>{unitLabel}</Text>
@@ -110,6 +116,7 @@ const SettingComponent: React.FunctionComponent<Props> = props => {
 						maximumValue={maximum}
 						value={props.value}
 						onValueChange={newValue => void props.updateSettingValue(props.settingId, newValue)}
+						accessibilityHint={label}
 					/>
 				</View>
 			</View>
@@ -129,7 +136,7 @@ const SettingComponent: React.FunctionComponent<Props> = props => {
 		return (
 			<View key={props.settingId} style={{ flexDirection: 'column', borderBottomWidth: 1, borderBottomColor: theme.dividerColor }}>
 				<View key={props.settingId} style={containerStyle}>
-					<Text key="label" style={styleSheet.settingText}>
+					<Text key="label" style={styleSheet.settingText} nativeID={labelId}>
 						{md.label()}
 					</Text>
 					<TextInput
@@ -143,6 +150,7 @@ const SettingComponent: React.FunctionComponent<Props> = props => {
 						value={props.value}
 						onChangeText={(newValue: string) => void props.updateSettingValue(props.settingId, newValue)}
 						secureTextEntry={!!md.secure}
+						aria-labelledby={labelId}
 					/>
 				</View>
 				{descriptionComp}

packages/app-mobile/components/screens/ConfigScreen/SettingsToggle.tsx

@@ -36,6 +36,7 @@ const SettingsToggle: FunctionComponent<Props> = props => {
 					trackColor={{ false: theme.dividerColor }}
 					value={props.value}
 					onValueChange={(value: boolean) => void props.updateSettingValue(props.settingId, value)}
+					accessibilityHint={props.label}
 				/>
 			</View>
 			{props.description}