Fix the filtering of the pages on the Parent Page control

packages/components/CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Enhancements
 
 -   `InputControl`/`SelectControl`: update `height`/`min-height` to `32px` instead of `30px` to align with modern sizing scale ([#55490](https://github.com/WordPress/gutenberg/pull/55490)).
+-   `ComboboxControl`: Add `shouldFilter` prop to allow the options to be controlled and filtered externally ([#55574](https://github.com/WordPress/gutenberg/pull/55574)). 
 
 ### Bug Fix
 

packages/components/src/combobox-control/README.md

@@ -95,6 +95,14 @@ Function called when the control's search input value changes. The argument cont
 -   Type: `( value: string ) => void`
 -   Required: No
 
+#### shouldFilter
+
+Function called to determine whether the control should filter the list of displayed options based on the user input or whether it's something that is handled externally by updating the `options` prop when the `onFilterValueChange` callback is called.
+
+-   Type: `boolean`
+-	Required: No
+-	Default: `true`
+
 #### onChange
 
 Function called with the selected value changes.

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

@@ -120,6 +120,7 @@ function ComboboxControl( props: ComboboxControlProps ) {
 		help,
 		allowReset = true,
 		className,
+		shouldFilter = true,
 		messages = {
 			selected: __( 'Item selected.' ),
 		},
@@ -151,18 +152,21 @@ function ComboboxControl( props: ComboboxControlProps ) {
 	const matchingSuggestions = useMemo( () => {
 		const startsWithMatch: ComboboxControlOption[] = [];
 		const containsMatch: ComboboxControlOption[] = [];
+		const others: ComboboxControlOption[] = [];
 		const match = normalizeTextString( inputValue );
 		options.forEach( ( option ) => {
 			const index = normalizeTextString( option.label ).indexOf( match );
 			if ( index === 0 ) {
 				startsWithMatch.push( option );
 			} else if ( index > 0 ) {
 				containsMatch.push( option );
+			} else if ( ! shouldFilter ) {
+				others.push( option );
 			}
 		} );
 
-		return startsWithMatch.concat( containsMatch );
-	}, [ inputValue, options ] );
+		return startsWithMatch.concat( containsMatch ).concat( others );
+	}, [ shouldFilter, inputValue, options ] );
 
 	const onSuggestionSelected = (
 		newSelectedSuggestion: ComboboxControlOption

packages/components/src/combobox-control/test/index.tsx

@@ -212,6 +212,34 @@ describe.each( [
 		expect( input ).toHaveValue( targetOption.label );
 	} );
 
+	it( 'should not filter the list of options if shouldFilter is false', async () => {
+		const user = await userEvent.setup();
+		const targetOption = timezones[ 0 ];
+		const onChangeSpy = jest.fn();
+		render(
+			<Component
+				options={ timezones }
+				label={ defaultLabelText }
+				onChange={ onChangeSpy }
+				shouldFilter={ false }
+			/>
+		);
+		const input = getInput( defaultLabelText );
+
+		// Pressing tab selects the input and shows the options
+		await user.tab();
+
+		// Type enough characters to ensure a predictable search result
+		await user.keyboard( 'Japan' );
+
+		// Pressing Enter/Return selects the currently focused option
+		await user.keyboard( '{Enter}' );
+
+		expect( onChangeSpy ).toHaveBeenCalledTimes( 1 );
+		expect( onChangeSpy ).toHaveBeenCalledWith( targetOption.value );
+		expect( input ).toHaveValue( targetOption.label );
+	} );
+
 	it( 'should render aria-live announcement upon selection', async () => {
 		const user = await userEvent.setup();
 		const targetOption = timezones[ 9 ];

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

@@ -73,4 +73,10 @@ export type ComboboxControlProps = Pick<
 	 * The current value of the control.
 	 */
 	value?: string | null;
+	/**
+	 * By default the control will filter the options based on the input value.
+	 * but if you're providing filtered options using REST API or something else,
+	 * you may consider disabling the filtering by marking this prop as false.
+	 */
+	shouldFilter?: boolean;
 };

packages/editor/src/components/page-attributes/parent.js

@@ -167,6 +167,7 @@ export function PageAttributesParent() {
 			options={ parentOptions }
 			onFilterValueChange={ debounce( handleKeydown, 300 ) }
 			onChange={ handleChange }
+			shouldFilter={ false }
 		/>
 	);
 }