Feature: add ability to show drop cap setting in paragraph block by d…

…efault via defaultControls config (#45994)

Co-authored-by: fabiankaegy <fabiankaegy@git.wordpress.org>
Co-authored-by: Mamaduka <mamaduka@git.wordpress.org>
Co-authored-by: youknowriad <youknowriad@git.wordpress.org>
Co-authored-by: aaronrobertshaw <aaronrobertshaw@git.wordpress.org>
Co-authored-by: jasmussen <joen@git.wordpress.org>
Co-authored-by: carolinan <poena@git.wordpress.org>
Co-authored-by: jeffpaul <jeffpaul@git.wordpress.org>
Co-authored-by: jordesign <jordesign@git.wordpress.org>

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

@@ -21,6 +21,7 @@ import {
 	useSettings,
 	useBlockEditingMode,
 } from '@wordpress/block-editor';
+import { getBlockSupport } from '@wordpress/blocks';
 import { formatLtr } from '@wordpress/icons';
 
 /**
@@ -47,7 +48,7 @@ function hasDropCapDisabled( align ) {
 	return align === ( isRTL() ? 'left' : 'right' ) || align === 'center';
 }
 
-function DropCapControl( { clientId, attributes, setAttributes } ) {
+function DropCapControl( { clientId, attributes, setAttributes, name } ) {
 	// Please do not add a useSelect call to the paragraph block unconditionally.
 	// Every useSelect added to a (frequently used) block will degrade load
 	// and type performance. By moving it within InspectorControls, the subscription is
@@ -69,11 +70,18 @@ function DropCapControl( { clientId, attributes, setAttributes } ) {
 		helpText = __( 'Show a large initial letter.' );
 	}
 
+	const isDropCapControlEnabledByDefault = getBlockSupport(
+		name,
+		'typography.defaultControls.dropCap',
+		false
+	);
+
 	return (
 		<InspectorControls group="typography">
 			<ToolsPanelItem
 				hasValue={ () => !! dropCap }
 				label={ __( 'Drop cap' ) }
+				isShownByDefault={ isDropCapControlEnabledByDefault }
 				onDeselect={ () => setAttributes( { dropCap: undefined } ) }
 				resetAllFilter={ () => ( { dropCap: undefined } ) }
 				panelId={ clientId }
@@ -99,6 +107,7 @@ function ParagraphBlock( {
 	setAttributes,
 	clientId,
 	isSelected: isSingleSelected,
+	name,
 } ) {
 	const { align, content, direction, dropCap, placeholder } = attributes;
 	const blockProps = useBlockProps( {
@@ -136,6 +145,7 @@ function ParagraphBlock( {
 			) }
 			{ isSingleSelected && (
 				<DropCapControl
+					name={ name }
 					clientId={ clientId }
 					attributes={ attributes }
 					setAttributes={ setAttributes }