SlotFill: remove registration API from useSlot result (#67070)

* SlotFill: remove registration API from useSlot result

* Add changelog entry

Co-authored-by: jsnajdr <[email protected]>
Co-authored-by: youknowriad <[email protected]>

packages/components/CHANGELOG.md

@@ -11,6 +11,10 @@
 -   `ToggleGroupControl`: Fix active background for `0` value ([#66855](https://github.com/WordPress/gutenberg/pull/66855)).
 -   `SlotFill`: Fix a bug where a stale value of `fillProps` could be used ([#67000](https://github.com/WordPress/gutenberg/pull/67000)).
 
+### Experimental
+
+-   `SlotFill`: Remove registration API methods from return value of `__experimentalUseSlot` ([#67070](https://github.com/WordPress/gutenberg/pull/67070)).
+
 ## 28.12.0 (2024-11-16)
 
 ### Deprecations

packages/components/src/slot-fill/bubbles-virtually/fill.tsx

@@ -1,12 +1,19 @@
 /**
  * WordPress dependencies
  */
-import { useRef, useState, useEffect, createPortal } from '@wordpress/element';
+import { useObservableValue } from '@wordpress/compose';
+import {
+	useContext,
+	useRef,
+	useState,
+	useEffect,
+	createPortal,
+} from '@wordpress/element';
 
 /**
  * Internal dependencies
  */
-import useSlot from './use-slot';
+import SlotFillContext from './slot-fill-context';
 import StyleProvider from '../../style-provider';
 import type { FillComponentProps } from '../types';
 
@@ -28,23 +35,23 @@ function useForceUpdate() {
 	};
 }
 
-export default function Fill( props: FillComponentProps ) {
-	const { name, children } = props;
-	const { registerFill, unregisterFill, ...slot } = useSlot( name );
+export default function Fill( { name, children }: FillComponentProps ) {
+	const registry = useContext( SlotFillContext );
+	const slot = useObservableValue( registry.slots, name );
 	const rerender = useForceUpdate();
 	const ref = useRef( { rerender } );
 
 	useEffect( () => {
 		// We register fills so we can keep track of their existence.
 		// Some Slot implementations need to know if there're already fills
 		// registered so they can choose to render themselves or not.
-		registerFill( ref );
+		registry.registerFill( name, ref );
 		return () => {
-			unregisterFill( ref );
+			registry.unregisterFill( name, ref );
 		};
-	}, [ registerFill, unregisterFill ] );
+	}, [ registry, name ] );
 
-	if ( ! slot.ref || ! slot.ref.current ) {
+	if ( ! slot || ! slot.ref.current ) {
 		return null;
 	}
 

packages/components/src/slot-fill/bubbles-virtually/use-slot.ts

@@ -1,42 +1,17 @@
 /**
  * WordPress dependencies
  */
-import { useMemo, useContext } from '@wordpress/element';
+import { useContext } from '@wordpress/element';
 import { useObservableValue } from '@wordpress/compose';
 
 /**
  * Internal dependencies
  */
 import SlotFillContext from './slot-fill-context';
-import type {
-	SlotFillBubblesVirtuallyFillRef,
-	SlotFillBubblesVirtuallySlotRef,
-	FillProps,
-	SlotKey,
-} from '../types';
+import type { SlotKey } from '../types';
 
 export default function useSlot( name: SlotKey ) {
 	const registry = useContext( SlotFillContext );
 	const slot = useObservableValue( registry.slots, name );
-
-	const api = useMemo(
-		() => ( {
-			updateSlot: (
-				ref: SlotFillBubblesVirtuallySlotRef,
-				fillProps: FillProps
-			) => registry.updateSlot( name, ref, fillProps ),
-			unregisterSlot: ( ref: SlotFillBubblesVirtuallySlotRef ) =>
-				registry.unregisterSlot( name, ref ),
-			registerFill: ( ref: SlotFillBubblesVirtuallyFillRef ) =>
-				registry.registerFill( name, ref ),
-			unregisterFill: ( ref: SlotFillBubblesVirtuallyFillRef ) =>
-				registry.unregisterFill( name, ref ),
-		} ),
-		[ name, registry ]
-	);
-
-	return {
-		...slot,
-		...api,
-	};
+	return { ...slot };
 }