Move HeadinglevelDropdown to its own component

packages/block-editor/CHANGELOG.md

@@ -2,10 +2,15 @@
 
 ## Unreleased
 
+### Enhancements
+
+- Add `HeadingLevelDropdown` component for selecting H1-H6 and paragraph HTML tags from the block toolbar.
+
 ### Bug Fix
 
 -   Fluid typography: custom font-sizes should use max viewport width ([#51516](https://github.com/WordPress/gutenberg/pull/51516)).
 
+
 ## 12.3.0 (2023-06-07)
 
 ## 12.2.0 (2023-05-24)
@@ -22,6 +27,7 @@
 
 ## 11.8.0 (2023-04-12)
 
+
 ## 11.7.0 (2023-03-29)
 
 -   `ImageSizeControl`: Update image size label ([#49112](https://github.com/WordPress/gutenberg/pull/49112)).

packages/block-editor/README.md

@@ -545,6 +545,18 @@ _Returns_
 
 -   `Object`: Typography block support derived CSS classes & styles.
 
+### HeadingLevelDropdown
+
+Dropdown for selecting a heading level (1 through 6) or paragraph (0).
+
+_Parameters_
+
+-   _props_ `WPHeadingLevelDropdownProps`: Component props.
+
+_Returns_
+
+-   `WPComponent`: The toolbar.
+
 ### HeightControl
 
 HeightControl renders a linked unit control and range control for adjusting the height of a block.

packages/block-editor/src/components/block-heading-level-dropdown/README.md

@@ -0,0 +1,52 @@
+# Heading Level Dropdown
+
+`<HeadingLevelDropdown>` Adds a dropdown for selecting H1-H6 and paragraph HTML tags from the block toolbar.
+Uses `<ToolbarDropdownMenu>`.
+
+## Usage
+
+```jsx
+
+import { BlockControls, HeadingLevelDropdown } from '@wordpress/block-editor';
+
+const HEADING_LEVELS = [ 0, 1, 2, 3, 4, 5, 6 ];
+
+const MyHeadingLevelToolbar = () => (
+	<BlockControls group="block">
+		<HeadingLevelDropdown
+			options={ HEADING_LEVELS }
+			value={ tag }
+			onChange={ ( newTag ) =>
+				setAttributes( { tag: newTag } )
+			}
+		/>
+	</BlockControls>
+);
+```
+
+### Props
+
+#### options
+
+The list of available HTML tags, passed from the block.
+
+-   Type: `Object`
+-   Required: no
+
+#### value
+
+The chosen HTML tag.
+
+-   Type: `string`
+-   Required: no
+
+#### onChange
+
+Callback to run when toolbar value is changed.
+
+-   Type: `string`
+-   Required: yes
+
+## Related components
+
+Block Editor components are components that can be used to compose the UI of your block editor. Thus, they can only be used under a [`BlockEditorProvider`](https://github.com/WordPress/gutenberg/blob/HEAD/packages/block-editor/src/components/provider/README.md) in the components tree.

packages/block-editor/src/components/block-heading-level-dropdown/heading-level-icon.js

@@ -0,0 +1,43 @@
+/**
+ * WordPress dependencies
+ */
+import {
+	headingLevel1,
+	headingLevel2,
+	headingLevel3,
+	headingLevel4,
+	headingLevel5,
+	headingLevel6,
+	paragraph,
+} from '@wordpress/icons';
+
+/** @typedef {import('@wordpress/element').WPComponent} WPComponent */
+
+/**
+ * HeadingLevelIcon props.
+ *
+ * @typedef WPHeadingLevelIconProps
+ *
+ * @property {number} level The heading level to show an icon for.
+ */
+
+const LEVEL_TO_PATH = {
+	0: paragraph,
+	1: headingLevel1,
+	2: headingLevel2,
+	3: headingLevel3,
+	4: headingLevel4,
+	5: headingLevel5,
+	6: headingLevel6,
+};
+
+/**
+ * Heading level icon.
+ *
+ * @param {WPHeadingLevelIconProps} props Component props.
+ *
+ * @return {?WPComponent} The icon.
+ */
+export default function HeadingLevelIcon( { level } ) {
+	return LEVEL_TO_PATH[ level ] ?? null;
+}

packages/block-library/src/heading/heading-level-dropdown.js → packages/block-editor/src/components/block-heading-level-dropdown/index.js

@@ -22,27 +22,32 @@ const POPOVER_PROPS = {
  *
  * @typedef WPHeadingLevelDropdownProps
  *
- * @property {number}                 selectedLevel The chosen heading level.
- * @property {(newValue:number)=>any} onChange      Callback to run when
- *                                                  toolbar value is changed.
+ * @property {number}                 value    The chosen heading level.
+ * @property {number[]}               options  An array of supported heading levels.
+ * @property {(newValue:number)=>any} onChange Callback to run when
+ *                                             toolbar value is changed.
  */
 
 /**
- * Dropdown for selecting a heading level (1 through 6).
+ * Dropdown for selecting a heading level (1 through 6) or paragraph (0).
  *
  * @param {WPHeadingLevelDropdownProps} props Component props.
  *
  * @return {WPComponent} The toolbar.
  */
-export default function HeadingLevelDropdown( { selectedLevel, onChange } ) {
+export default function HeadingLevelDropdown( {
+	options = HEADING_LEVELS,
+	value,
+	onChange,
+} ) {
 	return (
 		<ToolbarDropdownMenu
 			popoverProps={ POPOVER_PROPS }
-			icon={ <HeadingLevelIcon level={ selectedLevel } /> }
-			label={ __( 'Change heading level' ) }
-			controls={ HEADING_LEVELS.map( ( targetLevel ) => {
+			icon={ <HeadingLevelIcon level={ value } /> }
+			label={ __( 'Change level' ) }
+			controls={ options.map( ( targetLevel ) => {
 				{
-					const isActive = targetLevel === selectedLevel;
+					const isActive = targetLevel === value;
 
 					return {
 						icon: (
@@ -51,11 +56,14 @@ export default function HeadingLevelDropdown( { selectedLevel, onChange } ) {
 								isPressed={ isActive }
 							/>
 						),
-						label: sprintf(
-							// translators: %s: heading level e.g: "1", "2", "3"
-							__( 'Heading %d' ),
-							targetLevel
-						),
+						label:
+							targetLevel === 0
+								? __( 'Paragraph' )
+								: sprintf(
+										// translators: %s: heading level e.g: "1", "2", "3"
+										__( 'Heading %d' ),
+										targetLevel
+								  ),
 						isActive,
 						onClick() {
 							onChange( targetLevel );

packages/block-library/src/heading/heading-level-dropdown.native.js → packages/block-editor/src/components/block-heading-level-dropdown/index.native.js

@@ -57,7 +57,7 @@ export default function HeadingLevelDropdown( { selectedLevel, onChange } ) {
 			controls={ HEADING_LEVELS.map( ( index ) =>
 				createLevelControl( index, selectedLevel, onChange )
 			) }
-			label={ __( 'Change heading level' ) }
+			label={ __( 'Change level' ) }
 		/>
 	);
 }

packages/block-editor/src/components/index.js

@@ -26,6 +26,7 @@ export { default as BlockEdit, useBlockEditContext } from './block-edit';
 export { default as BlockIcon } from './block-icon';
 export { default as BlockNavigationDropdown } from './block-navigation/dropdown';
 export { default as BlockStyles } from './block-styles';
+export { default as HeadingLevelDropdown } from './block-heading-level-dropdown';
 export { default as __experimentalBlockVariationPicker } from './block-variation-picker';
 export { default as __experimentalBlockPatternSetup } from './block-pattern-setup';
 export { default as __experimentalBlockVariationTransforms } from './block-variation-transforms';

packages/block-editor/src/components/index.native.js

@@ -28,6 +28,7 @@ export {
 	JustifyContentControl,
 } from './justify-content-control';
 export { default as LineHeightControl } from './line-height-control';
+export { default as HeadingLevelDropdown } from './block-heading-level-dropdown';
 export { default as PlainText } from './plain-text';
 export {
 	default as RichText,

packages/block-library/src/comments-title/edit.js

@@ -12,6 +12,7 @@ import {
 	useBlockProps,
 	InspectorControls,
 	store as blockEditorStore,
+	HeadingLevelDropdown,
 } from '@wordpress/block-editor';
 import { __, _n, sprintf } from '@wordpress/i18n';
 import { useEntityProp } from '@wordpress/core-data';
@@ -21,11 +22,6 @@ import { useSelect } from '@wordpress/data';
 import apiFetch from '@wordpress/api-fetch';
 import { addQueryArgs } from '@wordpress/url';
 
-/**
- * Internal dependencies
- */
-import HeadingLevelDropdown from '../heading/heading-level-dropdown';
-
 export default function Edit( {
 	attributes: { textAlign, showPostTitle, showCommentsCount, level },
 	setAttributes,
@@ -98,7 +94,7 @@ export default function Edit( {
 				}
 			/>
 			<HeadingLevelDropdown
-				selectedLevel={ level }
+				value={ level }
 				onChange={ ( newLevel ) =>
 					setAttributes( { level: newLevel } )
 				}

packages/block-library/src/heading/edit.js

@@ -16,12 +16,12 @@ import {
 	RichText,
 	useBlockProps,
 	store as blockEditorStore,
+	HeadingLevelDropdown,
 } from '@wordpress/block-editor';
 
 /**
  * Internal dependencies
  */
-import HeadingLevelDropdown from './heading-level-dropdown';
 import { generateAnchor, setAnchor } from './autogenerate-anchors';
 
 function HeadingEdit( {
@@ -92,7 +92,7 @@ function HeadingEdit( {
 		<>
 			<BlockControls group="block">
 				<HeadingLevelDropdown
-					selectedLevel={ level }
+					value={ level }
 					onChange={ ( newLevel ) =>
 						setAttributes( { level: newLevel } )
 					}

packages/block-library/src/post-title/edit.js

@@ -12,6 +12,7 @@ import {
 	InspectorControls,
 	useBlockProps,
 	PlainText,
+	HeadingLevelDropdown,
 	privateApis as blockEditorPrivateApis,
 } from '@wordpress/block-editor';
 import { ToggleControl, TextControl, PanelBody } from '@wordpress/components';
@@ -22,7 +23,6 @@ import { useEntityProp } from '@wordpress/core-data';
 /**
  * Internal dependencies
  */
-import HeadingLevelDropdown from '../heading/heading-level-dropdown';
 import { useCanEditEntity } from '../utils/hooks';
 import { unlock } from '../lock-unlock';
 
@@ -34,7 +34,7 @@ export default function PostTitleEdit( {
 	context: { postType, postId, queryId },
 	insertBlocksAfter,
 } ) {
-	const TagName = 0 === level ? 'p' : 'h' + level;
+	const TagName = 'h' + level;
 	const isDescendentOfQueryLoop = Number.isFinite( queryId );
 	/**
 	 * Hack: useCanEditEntity may trigger an OPTIONS request to the REST API via the canUser resolver.
@@ -120,7 +120,7 @@ export default function PostTitleEdit( {
 			{ blockEditingMode === 'default' && (
 				<BlockControls group="block">
 					<HeadingLevelDropdown
-						selectedLevel={ level }
+						value={ level }
 						onChange={ ( newLevel ) =>
 							setAttributes( { level: newLevel } )
 						}

packages/block-library/src/post-title/index.php

@@ -28,7 +28,7 @@ function render_block_core_post_title( $attributes, $content, $block ) {
 
 	$tag_name = 'h2';
 	if ( isset( $attributes['level'] ) ) {
-		$tag_name = 0 === $attributes['level'] ? 'p' : 'h' . $attributes['level'];
+		$tag_name = 'h' . $attributes['level'];
 	}
 
 	if ( isset( $attributes['isLink'] ) && $attributes['isLink'] ) {

packages/block-library/src/query-title/edit.js

@@ -12,15 +12,11 @@ import {
 	InspectorControls,
 	useBlockProps,
 	Warning,
+	HeadingLevelDropdown,
 } from '@wordpress/block-editor';
 import { ToggleControl, PanelBody } from '@wordpress/components';
 import { __ } from '@wordpress/i18n';
 
-/**
- * Internal dependencies
- */
-import HeadingLevelDropdown from '../heading/heading-level-dropdown';
-
 const SUPPORTED_TYPES = [ 'archive', 'search' ];
 
 export default function QueryTitleEdit( {
@@ -98,7 +94,7 @@ export default function QueryTitleEdit( {
 		<>
 			<BlockControls group="block">
 				<HeadingLevelDropdown
-					selectedLevel={ level }
+					value={ level }
 					onChange={ ( newLevel ) =>
 						setAttributes( { level: newLevel } )
 					}

packages/block-library/src/site-title/edit/index.js

@@ -15,15 +15,13 @@ import {
 	InspectorControls,
 	BlockControls,
 	useBlockProps,
+	HeadingLevelDropdown,
 } from '@wordpress/block-editor';
 import { ToggleControl, PanelBody } from '@wordpress/components';
 import { createBlock, getDefaultBlockName } from '@wordpress/blocks';
 import { decodeEntities } from '@wordpress/html-entities';
 
-/**
- * Internal dependencies
- */
-import LevelControl from './level-toolbar';
+const HEADING_LEVELS = [ 0, 1, 2, 3, 4, 5, 6 ];
 
 export default function SiteTitleEdit( {
 	attributes,
@@ -95,8 +93,9 @@ export default function SiteTitleEdit( {
 	return (
 		<>
 			<BlockControls group="block">
-				<LevelControl
-					level={ level }
+				<HeadingLevelDropdown
+					options={ HEADING_LEVELS }
+					value={ level }
 					onChange={ ( newLevel ) =>
 						setAttributes( { level: newLevel } )
 					}