From 2406704f9d9734bcc6aeee8873f75d5971150e26 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pawe=C5=82=20Kwa=C5=9Bnik?= <kwach2000@gmail.com>
Date: Thu, 11 Mar 2021 14:37:11 +0100
Subject: [PATCH] Fixing target=_blank duplicates after clicking on it in the
 documentation example.

---
 packages/ckeditor5-link/src/linkediting.js   |  1 +
 packages/ckeditor5-link/tests/linkediting.js | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/packages/ckeditor5-link/src/linkediting.js b/packages/ckeditor5-link/src/linkediting.js
index cf24b118235..5bcae244161 100644
--- a/packages/ckeditor5-link/src/linkediting.js
+++ b/packages/ckeditor5-link/src/linkediting.js
@@ -516,6 +516,7 @@ export default class LinkEditing extends Plugin {
 // @param {module:utils/collection~Collection} manualDecorators
 function removeLinkAttributesFromSelection( writer, manualDecorators ) {
 	writer.removeSelectionAttribute( 'linkHref' );
+	writer.removeSelectionAttribute( 'linkTarget' );
 
 	for ( const decorator of manualDecorators ) {
 		writer.removeSelectionAttribute( decorator.id );
diff --git a/packages/ckeditor5-link/tests/linkediting.js b/packages/ckeditor5-link/tests/linkediting.js
index cced56d0e57..bf4e8deaa9f 100644
--- a/packages/ckeditor5-link/tests/linkediting.js
+++ b/packages/ckeditor5-link/tests/linkediting.js
@@ -158,6 +158,22 @@ describe( 'LinkEditing', () => {
 			expect( [ ...model.document.selection.getAttributeKeys() ] ).to.be.empty;
 		} );
 
+		it( 'should remove linkTarget attribute when pasting a link', () => {
+			editor.model.schema.extend( '$text', { allowAttributes: 'linkTarget' } );
+
+			setModelData( model, '<paragraph>foo[]</paragraph>' );
+
+			model.change( writer => {
+				model.insertContent( writer.createText( 'INSERTED', { linkHref: 'ckeditor.com', linkTarget: '_blank' } ) );
+			} );
+
+			expect( getModelData( model ) ).to.equal(
+				'<paragraph>foo<$text linkHref="ckeditor.com" linkTarget="_blank">INSERTED</$text>[]</paragraph>'
+			);
+
+			expect( [ ...model.document.selection.getAttributeKeys() ] ).to.be.empty;
+		} );
+
 		it( 'should remove all attributes starting with "link" (e.g. decorator attributes) when pasting a link', () => {
 			setModelData( model, '<paragraph>foo[]</paragraph>' );