InputControl: Add padding wrapper for prefix/suffix

packages/components/CHANGELOG.md

@@ -10,6 +10,7 @@
 
 -   `BorderControl`: Improve labelling, tooltips and DOM structure ([#42348](https://github.com/WordPress/gutenberg/pull/42348/)).
 -   `BaseControl`: Set zero padding on `StyledLabel` to ensure cross-browser styling ([#42348](https://github.com/WordPress/gutenberg/pull/42348/)).
+-   `InputControl`: Implement wrapper subcomponents for adding responsive padding to `prefix`/`suffix` ([#42378](https://github.com/WordPress/gutenberg/pull/42378)).
 -   `SelectControl`: Add flag for larger default size ([#42456](https://github.com/WordPress/gutenberg/pull/42456/)).
 -   `UnitControl`: Update unit select's focus styles to match input's ([#42383](https://github.com/WordPress/gutenberg/pull/42383)).
 

packages/components/src/index.js

@@ -91,6 +91,8 @@ export {
 	Item as __experimentalItem,
 } from './item-group';
 export { default as __experimentalInputControl } from './input-control';
+export { default as __experimentalInputControlPrefixWrapper } from './input-control/input-prefix-wrapper';
+export { default as __experimentalInputControlSuffixWrapper } from './input-control/input-suffix-wrapper';
 export { default as KeyboardShortcuts } from './keyboard-shortcuts';
 export { default as MenuGroup } from './menu-group';
 export { default as MenuItem } from './menu-item';

packages/components/src/input-control/index.tsx

@@ -30,6 +30,7 @@ function useUniqueId( idProp?: string ) {
 
 export function UnforwardedInputControl(
 	{
+		__next36pxDefaultSize,
 		__unstableStateReducer: stateReducer = ( state ) => state,
 		__unstableInputWidth,
 		className,
@@ -63,6 +64,7 @@ export function UnforwardedInputControl(
 
 	return (
 		<InputBase
+			__next36pxDefaultSize={ __next36pxDefaultSize }
 			__unstableInputWidth={ __unstableInputWidth }
 			className={ classes }
 			disabled={ disabled }
@@ -79,6 +81,7 @@ export function UnforwardedInputControl(
 		>
 			<InputField
 				{ ...props }
+				__next36pxDefaultSize={ __next36pxDefaultSize }
 				className="components-input-control__input"
 				disabled={ disabled }
 				id={ id }

packages/components/src/input-control/input-base.tsx

@@ -7,7 +7,7 @@ import type { ForwardedRef } from 'react';
  * WordPress dependencies
  */
 import { useInstanceId } from '@wordpress/compose';
-import { forwardRef } from '@wordpress/element';
+import { forwardRef, useMemo } from '@wordpress/element';
 
 /**
  * Internal dependencies
@@ -20,8 +20,10 @@ import {
 	Prefix,
 	Suffix,
 	LabelWrapper,
+	getSizeConfig,
 } from './styles/input-control-styles';
 import type { InputBaseProps, LabelPosition } from './types';
+import { ContextSystemProvider } from '../ui/context';
 
 function useUniqueId( idProp?: string ) {
 	const instanceId = useInstanceId( InputBase );
@@ -52,6 +54,7 @@ function getUIFlexProps( labelPosition?: LabelPosition ) {
 
 export function InputBase(
 	{
+		__next36pxDefaultSize,
 		__unstableInputWidth,
 		children,
 		className,
@@ -71,6 +74,17 @@ export function InputBase(
 	const id = useUniqueId( idProp );
 	const hideLabel = hideLabelFromVision || ! label;
 
+	const { paddingLeft, paddingRight } = getSizeConfig( {
+		inputSize: size,
+		__next36pxDefaultSize,
+	} );
+	const prefixSuffixContextValue = useMemo( () => {
+		return {
+			InputControlPrefixWrapper: { paddingLeft },
+			InputControlSuffixWrapper: { paddingRight },
+		};
+	}, [ paddingLeft, paddingRight ] );
+
 	return (
 		// @ts-expect-error The `direction` prop from Flex (FlexDirection) conflicts with legacy SVGAttributes `direction` (string) that come from React intrinsic prop definitions.
 		<Root
@@ -99,17 +113,19 @@ export function InputBase(
 				hideLabel={ hideLabel }
 				labelPosition={ labelPosition }
 			>
-				{ prefix && (
-					<Prefix className="components-input-control__prefix">
-						{ prefix }
-					</Prefix>
-				) }
-				{ children }
-				{ suffix && (
-					<Suffix className="components-input-control__suffix">
-						{ suffix }
-					</Suffix>
-				) }
+				<ContextSystemProvider value={ prefixSuffixContextValue }>
+					{ prefix && (
+						<Prefix className="components-input-control__prefix">
+							{ prefix }
+						</Prefix>
+					) }
+					{ children }
+					{ suffix && (
+						<Suffix className="components-input-control__suffix">
+							{ suffix }
+						</Suffix>
+					) }
+				</ContextSystemProvider>
 				<Backdrop disabled={ disabled } isFocused={ isFocused } />
 			</Container>
 		</Root>

packages/components/src/input-control/input-prefix-wrapper.tsx

@@ -0,0 +1,48 @@
+/**
+ * External dependencies
+ */
+import type { ForwardedRef } from 'react';
+
+/**
+ * Internal dependencies
+ */
+import { Spacer } from '../spacer';
+import {
+	WordPressComponentProps,
+	contextConnect,
+	useContextSystem,
+} from '../ui/context';
+import type { InputControlPrefixWrapperProps } from './types';
+
+function UnconnectedInputControlPrefixWrapper(
+	props: WordPressComponentProps< InputControlPrefixWrapperProps, 'div' >,
+	forwardedRef: ForwardedRef< any >
+) {
+	const derivedProps = useContextSystem( props, 'InputControlPrefixWrapper' );
+
+	return (
+		<Spacer marginBottom={ 0 } { ...derivedProps } ref={ forwardedRef } />
+	);
+}
+
+/**
+ * A convenience wrapper for the `prefix` when you want to apply
+ * standard padding in accordance with the size variant.
+ *
+ * ```jsx
+ * import {
+ *   __experimentalInputControl as InputControl,
+ *   __experimentalInputControlPrefixWrapper as InputControlPrefixWrapper,
+ * } from '@wordpress/components';
+ *
+ * <InputControl
+ *   prefix={<InputControlPrefixWrapper>@</InputControlPrefixWrapper>}
+ * />
+ * ```
+ */
+export const InputControlPrefixWrapper = contextConnect(
+	UnconnectedInputControlPrefixWrapper,
+	'InputControlPrefixWrapper'
+);
+
+export default InputControlPrefixWrapper;

packages/components/src/input-control/input-suffix-wrapper.tsx

@@ -0,0 +1,48 @@
+/**
+ * External dependencies
+ */
+import type { ForwardedRef } from 'react';
+
+/**
+ * Internal dependencies
+ */
+import { Spacer } from '../spacer';
+import {
+	WordPressComponentProps,
+	contextConnect,
+	useContextSystem,
+} from '../ui/context';
+import type { InputControlSuffixWrapperProps } from './types';
+
+function UnconnectedInputControlSuffixWrapper(
+	props: WordPressComponentProps< InputControlSuffixWrapperProps, 'div' >,
+	forwardedRef: ForwardedRef< any >
+) {
+	const derivedProps = useContextSystem( props, 'InputControlSuffixWrapper' );
+
+	return (
+		<Spacer marginBottom={ 0 } { ...derivedProps } ref={ forwardedRef } />
+	);
+}
+
+/**
+ * A convenience wrapper for the `suffix` when you want to apply
+ * standard padding in accordance with the size variant.
+ *
+ * ```jsx
+ * import {
+ *   __experimentalInputControl as InputControl,
+ *   __experimentalInputControlSuffixWrapper as InputControlSuffixWrapper,
+ * } from '@wordpress/components';
+ *
+ * <InputControl
+ *   suffix={<InputControlSuffixWrapper>%</InputControlSuffixWrapper>}
+ * />
+ * ```
+ */
+export const InputControlSuffixWrapper = contextConnect(
+	UnconnectedInputControlSuffixWrapper,
+	'InputControlSuffixWrapper'
+);
+
+export default InputControlSuffixWrapper;

packages/components/src/input-control/stories/index.tsx

@@ -7,10 +7,13 @@ import type { ComponentMeta, ComponentStory } from '@storybook/react';
  * Internal dependencies
  */
 import InputControl from '..';
+import { InputControlPrefixWrapper } from '../input-prefix-wrapper';
+import { InputControlSuffixWrapper } from '../input-suffix-wrapper';
 
 const meta: ComponentMeta< typeof InputControl > = {
 	title: 'Components (Experimental)/InputControl',
 	component: InputControl,
+	subcomponents: { InputControlPrefixWrapper, InputControlSuffixWrapper },
 	argTypes: {
 		__unstableInputWidth: { control: { type: 'text' } },
 		__unstableStateReducer: { control: { type: null } },
@@ -37,16 +40,26 @@ Default.args = {
 	placeholder: 'Placeholder',
 };
 
+/**
+ * A `prefix` can be inserted before the input. By default, the prefix is aligned with the edge of the input border,
+ * with no padding. If you want to apply standard padding in accordance with the size variant, use the provided
+ * `<InputControlPrefixWrapper>` convenience wrapper.
+ */
 export const WithPrefix = Template.bind( {} );
 WithPrefix.args = {
 	...Default.args,
-	prefix: <span style={ { marginInlineStart: 8 } }>@</span>,
+	prefix: <InputControlPrefixWrapper>@</InputControlPrefixWrapper>,
 };
 
+/**
+ * A `suffix` can be inserted after the input. By default, the suffix is aligned with the edge of the input border,
+ * with no padding. If you want to apply standard padding in accordance with the size variant, use the provided
+ * `<InputControlSuffixWrapper>` convenience wrapper.
+ */
 export const WithSuffix = Template.bind( {} );
 WithSuffix.args = {
 	...Default.args,
-	suffix: <button style={ { marginInlineEnd: 4 } }>Send</button>,
+	suffix: <InputControlSuffixWrapper>%</InputControlSuffixWrapper>,
 };
 
 export const WithSideLabel = Template.bind( {} );

packages/components/src/input-control/styles/input-control-styles.tsx

@@ -13,6 +13,7 @@ import { Flex, FlexItem } from '../../flex';
 import { Text } from '../../text';
 import { COLORS, rtl } from '../../utils';
 import type { LabelPosition, Size } from '../types';
+import { space } from '../../ui/utils/space';
 
 type ContainerProps = {
 	disabled?: boolean;
@@ -143,7 +144,7 @@ const fontSizeStyles = ( { inputSize: size }: InputProps ) => {
 	`;
 };
 
-const sizeStyles = ( {
+export const getSizeConfig = ( {
 	inputSize: size,
 	__next36pxDefaultSize,
 }: InputProps ) => {
@@ -153,22 +154,22 @@ const sizeStyles = ( {
 			height: 36,
 			lineHeight: 1,
 			minHeight: 36,
-			paddingLeft: 16,
-			paddingRight: 16,
+			paddingLeft: space( 4 ),
+			paddingRight: space( 4 ),
 		},
 		small: {
 			height: 24,
 			lineHeight: 1,
 			minHeight: 24,
-			paddingLeft: 8,
-			paddingRight: 8,
+			paddingLeft: space( 2 ),
+			paddingRight: space( 2 ),
 		},
 		'__unstable-large': {
 			height: 40,
 			lineHeight: 1,
 			minHeight: 40,
-			paddingLeft: 16,
-			paddingRight: 16,
+			paddingLeft: space( 4 ),
+			paddingRight: space( 4 ),
 		},
 	};
 
@@ -177,14 +178,16 @@ const sizeStyles = ( {
 			height: 30,
 			lineHeight: 1,
 			minHeight: 30,
-			paddingLeft: 8,
-			paddingRight: 8,
+			paddingLeft: space( 2 ),
+			paddingRight: space( 2 ),
 		};
 	}
 
-	const style = sizes[ size as Size ] || sizes.default;
+	return sizes[ size as Size ] || sizes.default;
+};
 
-	return css( style );
+const sizeStyles = ( props: InputProps ) => {
+	return css( getSizeConfig( props ) );
 };
 
 const customPaddings = ( {

packages/components/src/input-control/types.ts

@@ -125,10 +125,38 @@ export interface InputBaseProps extends BaseProps, FlexProps {
 	children: ReactNode;
 	/**
 	 * Renders an element on the left side of the input.
+	 *
+	 * By default, the prefix is aligned with the edge of the input border, with no padding.
+	 * If you want to apply standard padding in accordance with the size variant, wrap the element in
+	 * the provided `<InputControlPrefixWrapper>` component.
+	 *
+	 * @example
+	 * import {
+	 *   __experimentalInputControl as InputControl,
+	 *   __experimentalInputControlPrefixWrapper as InputControlPrefixWrapper,
+	 * } from '@wordpress/components';
+	 *
+	 * <InputControl
+	 *   prefix={<InputControlPrefixWrapper>@</InputControlPrefixWrapper>}
+	 * />
 	 */
 	prefix?: ReactNode;
 	/**
 	 * Renders an element on the right side of the input.
+	 *
+	 * By default, the suffix is aligned with the edge of the input border, with no padding.
+	 * If you want to apply standard padding in accordance with the size variant, wrap the element in
+	 * the provided `<InputControlSuffixWrapper>` component.
+	 *
+	 * @example
+	 * import {
+	 *   __experimentalInputControl as InputControl,
+	 *   __experimentalInputControlSuffixWrapper as InputControlSuffixWrapper,
+	 * } from '@wordpress/components';
+	 *
+	 * <InputControl
+	 *   suffix={<InputControlSuffixWrapper>%</InputControlSuffixWrapper>}
+	 * />
 	 */
 	suffix?: ReactNode;
 	/**
@@ -175,3 +203,17 @@ export interface InputControlLabelProps {
 	labelPosition?: BaseProps[ 'labelPosition' ];
 	size?: BaseProps[ 'size' ];
 }
+
+export type InputControlPrefixWrapperProps = {
+	/**
+	 * The prefix to be inserted.
+	 */
+	children: ReactNode;
+};
+
+export type InputControlSuffixWrapperProps = {
+	/**
+	 * The suffix to be inserted.
+	 */
+	children: ReactNode;
+};

packages/components/src/unit-control/test/__snapshots__/index.tsx.snap

@@ -22,7 +22,7 @@ Snapshot Diff:
       >
         <input
           autocomplete="off"
-          class="components-input-control__input css-1vhigq9-Input-dragStyles-fontSizeStyles-sizeStyles-customPaddings em5sgkm5"
+          class="components-input-control__input css-1hsyo1w-Input-dragStyles-fontSizeStyles-sizeStyles-customPaddings em5sgkm5"
 -         id="inspector-input-control-1"
 +         id="inspector-input-control-2"
           inputmode="numeric"