Rich text: fix link paste for internal paste (#59063)

Co-authored-by: ellatrix <ellatrix@git.wordpress.org>
Co-authored-by: mcsf <mcsf@git.wordpress.org>
Co-authored-by: youknowriad <youknowriad@git.wordpress.org>
Co-authored-by: annezazu <annezazu@git.wordpress.org>

Author: 4 people

packages/block-editor/src/components/rich-text/use-paste-handler.js

@@ -58,13 +58,35 @@ export function usePasteHandler( props ) {
 			const isInternal =
 				event.clipboardData.getData( 'rich-text' ) === 'true';
 
+			function pasteInline( content ) {
+				const transformed = formatTypes.reduce(
+					( accumulator, { __unstablePasteRule } ) => {
+						// Only allow one transform.
+						if ( __unstablePasteRule && accumulator === value ) {
+							accumulator = __unstablePasteRule( value, {
+								html,
+								plainText,
+							} );
+						}
+
+						return accumulator;
+					},
+					value
+				);
+				if ( transformed !== value ) {
+					onChange( transformed );
+				} else {
+					const valueToInsert = create( { html: content } );
+					addActiveFormats( valueToInsert, value.activeFormats );
+					onChange( insert( value, valueToInsert ) );
+				}
+			}
+
 			// If the data comes from a rich text instance, we can directly use it
 			// without filtering the data. The filters are only meant for externally
 			// pasted content and remove inline styles.
 			if ( isInternal ) {
-				const pastedValue = create( { html } );
-				addActiveFormats( pastedValue, value.activeFormats );
-				onChange( insert( value, pastedValue ) );
+				pasteInline( html );
 				return;
 			}
 
@@ -135,28 +157,7 @@ export function usePasteHandler( props ) {
 			} );
 
 			if ( typeof content === 'string' ) {
-				const transformed = formatTypes.reduce(
-					( accumlator, { __unstablePasteRule } ) => {
-						// Only allow one transform.
-						if ( __unstablePasteRule && accumlator === value ) {
-							accumlator = __unstablePasteRule( value, {
-								html,
-								plainText,
-							} );
-						}
-
-						return accumlator;
-					},
-					value
-				);
-
-				if ( transformed !== value ) {
-					onChange( transformed );
-				} else {
-					const valueToInsert = create( { html: content } );
-					addActiveFormats( valueToInsert, value.activeFormats );
-					onChange( insert( value, valueToInsert ) );
-				}
+				pasteInline( content );
 			} else if ( content.length > 0 ) {
 				if ( onReplace && isEmpty( value ) ) {
 					onReplace( content, content.length - 1, -1 );

test/e2e/specs/editor/various/copy-cut-paste.spec.js

@@ -518,6 +518,30 @@ test.describe( 'Copy/cut/paste', () => {
 		] );
 	} );
 
+	test( 'should link selection on internal paste', async ( {
+		pageUtils,
+		editor,
+		page,
+	} ) => {
+		await editor.insertBlock( {
+			name: 'core/paragraph',
+			attributes: { content: 'https://w.org' },
+		} );
+		await pageUtils.pressKeys( 'primary+a' );
+		await pageUtils.pressKeys( 'primary+x' );
+		await page.keyboard.type( 'a' );
+		await pageUtils.pressKeys( 'shift+ArrowLeft' );
+		await pageUtils.pressKeys( 'primary+v' );
+		expect( await editor.getBlocks() ).toMatchObject( [
+			{
+				name: 'core/paragraph',
+				attributes: {
+					content: '<a href="https://w.org">a</a>',
+				},
+			},
+		] );
+	} );
+
 	test( 'should auto-link', async ( { pageUtils, editor } ) => {
 		await editor.insertBlock( {
 			name: 'core/paragraph',