text: /**
   * @license Copyright (c) 2003-2022, CKSource Holding sp. z o.o. All rights reserved.
   * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
   */
  
  /* globals document */
  
  import View from '../../../src/view/view';
  import UIElement from '../../../src/view/uielement';
  import ViewContainerElement from '../../../src/view/containerelement';
  import ViewAttribtueElement from '../../../src/view/attributeelement';
  import ViewText from '../../../src/view/text';
  import ViewRange from '../../../src/view/range';
  import { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';
  import createElement from '@ckeditor/ckeditor5-utils/src/dom/createelement';
  import createViewRoot from '../_utils/createroot';
  import { setData as setViewData } from '../../../src/dev-utils/view';
  import testUtils from '@ckeditor/ckeditor5-core/tests/_utils/utils';
  import { StylesProcessor } from '../../../src/view/stylesmap';
  
  describe( 'View', () => {
  	let view, viewDocument, domRoot, domSelection, viewRoot, foo, bar, ui, ui2;
  
  	function createUIElement( name, contents ) {
  		const element = new UIElement( viewDocument, name );
  
  		element.render = function( domDocument ) {
  			const domElement = this.toDomElement( domDocument );
  			domElement.innerText = contents;
  
  			return domElement;
  		};
  
  		return element;
  	}
  
  	beforeEach( () => {
  		domRoot = createElement( document, 'div', {
  			contenteditable: 'true'
  		} );
  		document.body.appendChild( domRoot );
  
  		view = new View( new StylesProcessor() );
  		viewDocument = view.document;
  		viewRoot = createViewRoot( viewDocument );
  		view.attachDomRoot( domRoot );
  
  		domSelection = document.getSelection();
  		domSelection.removeAllRanges();
  
  		viewDocument.isFocused = true;
  
  		foo = new ViewText( viewDocument, 'foo' );
  		bar = new ViewText( viewDocument, 'bar' );
  		ui = createUIElement( 'span', 'xxx' );
  		ui2 = createUIElement( 'span', 'yyy' );
  	} );
  
  	afterEach( () => {
  		view.destroy();
  
  		domRoot.parentElement.removeChild( domRoot );
  	} );
  
  	function renderAndFireKeydownEvent( options ) {
  		view.forceRender();
  
  		const eventData = Object.assign( { keyCode: keyCodes.arrowright, domTarget: view.domRoots.get( 'main' ) }, options );
  		viewDocument.fire( 'keydown', eventData );
  	}
  
  	function check( anchorNode, anchorOffset, focusNode, focusOffset ) {
  		const anchor = domSelection.anchorNode.data ? domSelection.anchorNode.data : domSelection.anchorNode.nodeName.toUpperCase();
  
  		expect( anchor, 'anchorNode' ).to.equal( anchorNode );
  		expect( domSelection.anchorOffset, 'anchorOffset' ).to.equal( anchorOffset );
  
  		if ( focusNode ) {
  			const focus = domSelection.focusNode.data ? domSelection.focusNode.data : domSelection.focusNode.nodeName.toUpperCase();
  
  			expect( focus, 'focusNode' ).to.equal( focusNode );
  			expect( domSelection.focusOffset, 'focusOffset' ).to.equal( focusOffset );
  		} else {
  			expect( domSelection.isCollapsed, 'isCollapsed' ).to.be.true;
  		}
  	}
  
  	describe( 'jump over ui element handler', () => {
  		describe( 'collapsed selection', () => {
  			it( 'do nothing when another key is pressed', () => {
  				// <container:p>foo<ui:span>xxx</ui:span>{}bar</container:p>
  				const p = new ViewContainerElement( viewDocument, 'p', null, [ foo, ui, bar ] );
  				viewRoot._appendChild( p );
  
  				view.change( writer => {
  					writer.setSelection( [ ViewRange._createFromParentsAndOffsets( bar, 0, bar, 0 ) ] );
  				} );
  
  				renderAndFireKeydownEvent( { keyCode: keyCodes.arrowleft } );
  
  				testUtils.checkAssertions(
  					() => check( 'bar', 0 ),
  					// Safari renders selection at the end of the text node.
  					() => check( 'xxx', 3 )
  				);
  			} );
  
  			it( 'jump over ui element when right arrow is pressed before ui element - directly before ui element', () => {
  				// <container:p>foo[]<ui:span>xxx</ui:span>bar</container:p>
  				const p = new ViewContainerElement( viewDocument, 'p', null, [ foo, ui, bar ] );
  				viewRoot._appendChild( p );
  
  				view.change( writer => {
  					writer.setSelection( [ ViewRange._createFromParentsAndOffsets( p, 1, p, 1 ) ] );
  				} );
  
  				renderAndFireKeydownEvent();
  
  				testUtils.checkAssertions(
  					// <p>foo<span>xxx</span>[]bar</p>
  					() => check( 'P', 2 ),
  					// Safari renders selection at the end of the text node.
  					// <p>foo<span>xxx{}</span>bar</p>
  					() => check( 'xxx', 3 )
  				);
  			} );
  
  			it( 'jump over ui element when right arrow is pressed before ui element - not directly before ui element', () => {
  				// <container:p>foo{}<ui:span>xxx</ui:span>bar</container:p>
  				const p = new ViewContainerElement( viewDocument, 'p', null, [ foo, ui, bar ] );
  				viewRoot._appendChild( p );
  
  				view.change( writer => {
  					writer.setSelection( [ ViewRange._createFromParentsAndOffsets( foo, 3, foo, 3 ) ] );
  				} );
  
  				renderAndFireKeydownEvent();
  
  				testUtils.checkAssertions(
  					// <p>foo<span>xxx</span>[]bar</p>
  					() => check( 'P', 2 ),
  					// Safari renders selection at the end of the text node.
  					// <p>foo<span>xxx{}</span>bar</p>
  					() => check( 'xxx', 3 )
  				);
  			} );
  
  			it( 'jump over multiple ui elements when right arrow is pressed before ui element', () => {
  				// <container:p>foo{}<ui:span>xxx</ui:span><ui:span>yyy</ui:span>bar</container:p>'
  				const p = new ViewContainerElement( viewDocument, 'p', null, [ foo, ui, ui2, bar ] );
  				viewRoot._appendChild( p );
  
  				view.change( writer => {
  					writer.setSelection( [ ViewRange._createFromParentsAndOffsets( foo, 3, foo, 3 ) ] );
  				} );
  
  				renderAndFireKeydownEvent();
  
  				testUtils.checkAssertions(
  					// <p>foo<span>xxx</span><span>yyy</span>[]bar</p>
  					() => check( 'P', 3 ),
  					// Safari renders selection at the end of the text node.
  					// <p>foo<span>xxx</span><span>yyy{}</span>bar</p>
  					() => check( 'yyy', 3 )
  				);
  			} );
  
  			it( 'jump over ui elements at the end of container element', () => {
  				// <container:p>foo{}<ui:span>xxx</ui:span><ui:span>yyy</ui:span></container:p><container:div></container:div>
  				const p = new ViewContainerElement( viewDocument, 'p', null, [ foo, ui, ui2 ] );
  				const div = new ViewContainerElement( viewDocument, 'div' );
  
  				view.change( writer => {
  					viewRoot._appendChild( p );
  					viewRoot._appendChild( div );
  					writer.setSelection( [ ViewRange._createFromParentsAndOffsets( foo, 3, foo, 3 ) ] );
  				} );
  
  				renderAndFireKeydownEvent();
  
  				testUtils.checkAssertions(
  					// <p>foo<span>xxx</span><span>yyy</span>[]</p><div></div>
  					() => check( 'P', 3 ),
  					// Safari renders selection at the end of the text node.
  					// <p>foo<span>xxx</span><span>yyy{}</span></p><div></div>
  					() => check( 'yyy', 3 )
  				);
  			} );
  
  			it( 'jump over ui element if selection is in attribute element - case 1', () => {
  				// <container:p><attribute:b>foo{}</attribute:b><ui:span>xxx</ui:span>bar</container:p>
  				const b = new ViewAttribtueElement( viewDocument, 'b', null, foo );
  				const p = new ViewContainerElement( viewDocument, 'p', null, [ b, ui, bar ] );
  				viewRoot._appendChild( p );
  
  				view.change( writer => {
  					writer.setSelection( ViewRange._createFromParentsAndOffsets( foo, 3, foo, 3 ) );
  				} );
  
  				renderAndFireKeydownEvent();
  
  				testUtils.checkAssertions(
  					// <p><b>foo</b><span>xxx</span>[]bar</p>
  					() => check( 'P', 2 ),
  					// Safari renders selection at the end of the text node.
  					// <p><b>foo</b><span>xxx{}</span>bar</p>
  					() => check( 'xxx', 3 )
  				);
  			} );
  
  			it( 'jump over ui element if selection is in attribute element - case 2', () => {
  				// <container:p><attribute:b>foo[]</attribute:b><ui:span>xxx</ui:span>bar</container:p>
  				const b = new ViewAttribtueElement( viewDocument, 'b', null, foo );
  				const p = new ViewContainerElement( viewDocument, 'p', null, [ b, ui, bar ] );
  				viewRoot._appendChild( p );
  
  				view.change( writer => {
  					writer.setSelection( ViewRange._createFromParentsAndOffsets( b, 1, b, 1 ) );
  				} );
  
  				renderAndFireKeydownEvent();
  
  				testUtils.checkAssertions(
  					// <p><b>foo</b><span>xxx</span>[]bar</p>
  					() => check( 'P', 2 ),
  					// Safari renders selection at the end of the text node.
  					// <p><b>foo</b><span>xxx{}</span>bar</p>
  					() => check( 'xxx', 3 )
  				);
  			} );
  
  			it( 'jump over ui element if selection is in multiple attribute elements', () => {
  				// <container:p>
  				// 		<attribute:i>
  				// 			<attribute:b>foo{}</attribute:b>
  				// 		</attribute:i>
  				// 		<ui:span>
  				//			xxx
  				// 		</ui:span>
  				// 		bar
  				// </container:p>
  				const b = new ViewAttribtueElement( viewDocument, 'b', null, foo );
  				const i = new ViewAttribtueElement( viewDocument, 'i', null, b );
  				const p = new ViewContainerElement( viewDocument, 'p', null, [ i, ui, bar ] );
  
  				viewRoot._appendChild( p );
  
  				view.change( writer => {
  					writer.setSelection( ViewRange._createFromParentsAndOffsets( foo, 3, foo, 3 ) );
  				} );
  
  				renderAndFireKeydownEvent();
  
  				testUtils.checkAssertions(
  					// <p><i><b>foo</b></i><span>xxx</span>[]bar</p>
  					() => check( 'P', 2 ),
  					// Safari renders selection at the end of the text node.
  					// <p><i><b>foo</b></i><span>xxx{}</span>bar</p>
  					() => check( 'xxx', 3 )
  				);
  			} );
  
  			it( 'jump over empty attribute elements and ui elements', () => {
  				// <container:p>' +
  				// 		foo{}
  				// 		<attribute:b></attribute:b>
  				// 		<ui:span>xxx</ui:span>
  				// 		<ui:span>yyy</ui:span>
  				// 		<attribute:b></attribute:b>
  				// 		bar
  				// </container:p>
  				const b1 = new ViewAttribtueElement( viewDocument, 'b' );
  				const b2 = new ViewAttribtueElement( viewDocument, 'b' );
  				const p = new ViewContainerElement( viewDocument, 'p', null, [ foo, b1, ui, ui2, b2, bar ] );
  
  				viewRoot._appendChild( p );
  
  				view.change( writer => {
  					writer.setSelection( ViewRange._createFromParentsAndOffsets( foo, 3, foo, 3 ) );
  				} );
  
  				renderAndFireKeydownEvent();
  
  				testUtils.checkAssertions(
  					// <p>foo<b></b><span>xxx</span><span>yyy</span>[]bar</p>
  					() => check( 'P', 5 ),
  					// Safari renders selection at the end of the text node.
  					// <p>foo<b></b><span>xxx</span><span>yyy{}</span>bar</p>
  					() => check( 'yyy', 3 )
  				);
  			} );
  
  			it( 'jump over empty attribute elements and ui elements if shift key is pressed', () => {
  				// <container:p>
  				// 		foo{}
  				// 		<attribute:b></attribute:b>
  				// 		<ui:span>xxx</ui:span>
  				// 		<ui:span>yyy</ui:span>
  				// 		<attribute:b></attribute:b>
  				// 		bar
  				// </container:p>
  
  				const b1 = new ViewAttribtueElement( viewDocument, 'b' );
  				const b2 = new ViewAttribtueElement( viewDocument, 'b' );
  				const p = new ViewContainerElement( viewDocument, 'p', null, [ foo, b1, ui, ui2, b2, bar ] );
  
  				viewRoot._appendChild( p );
  
  				view.change( writer => {
  					writer.setSelection( ViewRange._createFromParentsAndOffsets( foo, 3, foo, 3 ) );
  				} );
  
  				renderAndFireKeydownEvent( { shiftKey: true } );
  
  				testUtils.checkAssertions(
  					// <p>foo<b></b><span>xxx</span><span>yyy</span><b><b>[]bar</p>
  					() => check( 'P', 5 ),
  					// Safari renders selection at the end of the text node.
  					// <p>foo<b></b><span>xxx</span><span>yyy{}</span><b><b>bar</p>
  					() => check( 'yyy', 3 )
  				);
  			} );
  
  			it( 'do nothing if selection is not directly before ui element', () => {
  				setViewData( view, '<container:p>fo{}o<ui:span></ui:span>bar</container:p>' );
  				renderAndFireKeydownEvent();
  
  				check( 'foo', 2 );
  			} );
  
  			it( 'do nothing if selection is in attribute element but not before ui element', () => {
  				setViewData( view, '<container:p><attribute:b>foo{}</attribute:b>bar</container:p>' );
  				renderAndFireKeydownEvent();
  
  				check( 'foo', 3 );
  			} );
  
  			it( 'do nothing if selection is before non-empty attribute element', () => {
  				setViewData( view, '<container:p>fo{}<attribute:b>o</attribute:b><ui:span></ui:span>bar</container:p>' );
  				renderAndFireKeydownEvent();
  
  				check( 'fo', 2 );
  			} );
  
  			it( 'do nothing if selection is before container element - case 1', () => {
  				setViewData( view, '<container:p>foo{}</container:p><ui:span></ui:span><container:div>bar</container:div>' );
  				renderAndFireKeydownEvent();
  
  				check( 'foo', 3 );
  			} );
  
  			it( 'do nothing if selection is before container element - case 2', () => {
  				setViewData( view, '<container:div>foo{}<container:p></container:p><ui:span></ui:span></container:div>' );
  				renderAndFireKeydownEvent();
  
  				check( 'foo', 3 );
  			} );
  
  			it( 'do nothing if selection is at the end of last container element', () => {
  				setViewData( view, '<container:p>foo{}</container:p>' );
  				renderAndFireKeydownEvent();
  
  				check( 'foo', 3 );
  			} );
  		} );
  
  		describe( 'non-collapsed selection', () => {
  			it( 'should do nothing', () => {
  				setViewData( view, '<container:p>f{oo}<ui:span></ui:span>bar</container:p>' );
  				renderAndFireKeydownEvent();
  
  				check( 'foo', 1, 'foo', 3 );
  			} );
  
  			it( 'should do nothing if selection is not before ui element - shift key pressed', () => {
  				setViewData( view, '<container:p>f{o}o<ui:span></ui:span>bar</container:p>' );
  				renderAndFireKeydownEvent( { shiftKey: true } );
  
  				check( 'foo', 1, 'foo', 2 );
  			} );
  
  			it( 'jump over ui element if shift key is pressed', () => {
  				// <container:p>fo{o}<ui:span>xxx</ui:span>bar</container:p>
  				const p = new ViewContainerElement( viewDocument, 'p', null, [ foo, ui, bar ] );
  
  				viewRoot._appendChild( p );
  
  				view.change( writer => {
  					writer.setSelection( ViewRange._createFromParentsAndOffsets( foo, 2, foo, 3 ) );
  				} );
  
  				renderAndFireKeydownEvent( { shiftKey: true } );
  
  				testUtils.checkAssertions(
  					// <p>fo{o<span>xxx</span>]bar</p>
  					() => check( 'foo', 2, 'P', 2 ),
  					// Safari renders selection at the end of the previous text node.
  					// <p>fo{o<span>xxx}</span>bar</p>
  					() => check( 'foo', 2, 'xxx', 3 )
  				);
  			} );
  
  			it( 'jump over ui element if selection is in multiple attribute elements', () => {
  				// <container:p>
  				// 		<attribute:i>
  				// 			<attribute:b>fo{o}</attribute:b>
  				// 		</attribute:i>
  				// 		<ui:span>xxx</ui:span>
  				// 		bar
  				// </container:p>
  				const b = new ViewAttribtueElement( viewDocument, 'b', null, foo );
  				const i = new ViewAttribtueElement( viewDocument, 'i', null, b );
  				const p = new ViewContainerElement( viewDocument, 'p', null, [ i, ui, bar ] );
  				viewRoot._appendChild( p );
  
  				view.change( writer => {
  					writer.setSelection( ViewRange._createFromParentsAndOffsets( foo, 2, foo, 3 ) );
  				} );
  
  				renderAndFireKeydownEvent( { shiftKey: true } );
  
  				testUtils.checkAssertions(
  					// <p><i><b>fo{o</b></i><span>xxx</span>]bar</p>
  					() => check( 'foo', 2, 'P', 2 ),
  					// Safari renders selection at the end of the previous text node.
  					// <p><i><b>fo{o</b></i><span>xxx}</span>bar</p>
  					() => check( 'foo', 2, 'xxx', 3 )
  				);
  			} );
  
  			it( 'jump over empty attribute elements and ui elements if shift key is pressed', () => {
  				// <container:p>
  				// 		fo{o}
  				// 		<attribute:b></attribute:b>
  				// 		<ui:span>xxx</ui:span>
  				// 		<ui:span>yyy</ui:span>
  				// 		<attribute:b></attribute:b>
  				// 		bar
  				// </container:p>
  				const b1 = new ViewAttribtueElement( viewDocument, 'b' );
  				const b2 = new ViewAttribtueElement( viewDocument, 'b' );
  				const p = new ViewContainerElement( viewDocument, 'p', null, [ foo, b1, ui, ui2, b2, bar ] );
  				viewRoot._appendChild( p );
  
  				view.change( writer => {
  					writer.setSelection( ViewRange._createFromParentsAndOffsets( foo, 2, foo, 3 ) );
  				} );
  
  				renderAndFireKeydownEvent( { shiftKey: true } );
  
  				testUtils.checkAssertions(
  					// <p>fo{o<b></b><span>xxx</span><span>yyy</span><b></b>]bar</p>
  					() => check( 'foo', 2, 'P', 5 ),
  					// Safari renders selection at the end of the previous text node.
  					// <p>fo{o<b></b><span>xxx</span><span>yyy}</span><b></b>bar</p>
  					() => check( 'foo', 2, 'yyy', 3 )
  				);
  			} );
  		} );
  
  		it( 'should do nothing if DOM position cannot be converted to view position', () => {
  			const newDiv = document.createElement( 'div' );
  			const domSelection = document.getSelection();
  
  			document.body.appendChild( newDiv );
  			domSelection.collapse( newDiv, 0 );
  
  			viewDocument.fire( 'keydown', { keyCode: keyCodes.arrowright, domTarget: view.domRoots.get( 'main' ) } );
  
  			newDiv.remove();
  		} );
  	} );
  } );
  