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- /**
- * @license Copyright (c) 2003-2016, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
- */
- /* bender-tags: view */
- 'use strict';
- import Document from '/ckeditor5/engine/view/document.js';
- import AttributeElement from '/ckeditor5/engine/view/attributeelement.js';
- import ContainerElement from '/ckeditor5/engine/view/containerelement.js';
- import Text from '/ckeditor5/engine/view/text.js';
- import TreeWalker from '/ckeditor5/engine/view/treewalker.js';
- import Position from '/ckeditor5/engine/view/position.js';
- import Range from '/ckeditor5/engine/view/range.js';
- import CKEditorError from '/ckeditor5/utils/ckeditorerror.js';
- describe( 'TreeWalker', () => {
- let doc, root, img1, paragraph, bold, textAbcd, charY, img2, charX;
- let rootBeginning, rootEnding;
- before( () => {
- doc = new Document();
- root = doc.createRoot( document.createElement( 'div' ) );
- // root
- // |- img1
- // |- p
- // |- b
- // | |- A
- // | |- B
- // | |- C
- // | |- D
- // |
- // |- Y
- // |
- // |- img2
- // |
- // |- X
- textAbcd = new Text( 'abcd' );
- bold = new AttributeElement( 'b', null, [ textAbcd ] );
- charY = new Text( 'y' );
- img2 = new ContainerElement( 'img2' );
- charX = new Text( 'x' );
- paragraph = new ContainerElement( 'p', null, [ bold, charY, img2, charX ] );
- img1 = new ContainerElement( 'img1' );
- root.insertChildren( 0, [ img1, paragraph ] );
- rootBeginning = new Position( root, 0 );
- rootEnding = new Position( root, 2 );
- } );
- describe( 'constructor', () => {
- it( 'should throw if neither boundaries nor starting position is set', () => {
- expect( () => {
- new TreeWalker();
- } ).to.throw( CKEditorError, /^tree-walker-no-start-position/ );
- expect( () => {
- new TreeWalker( {} );
- } ).to.throw( CKEditorError, /^tree-walker-no-start-position/ );
- expect( () => {
- new TreeWalker( { singleCharacters: true } );
- } ).to.throw( CKEditorError, /^tree-walker-no-start-position/ );
- } );
- it( 'should throw if walking direction is unknown', () => {
- expect( () => {
- new TreeWalker( { startPosition: rootBeginning, direction: 'UNKNOWN' } );
- } ).to.throw( CKEditorError, /^tree-walker-unknown-direction/ );
- } );
- } );
- describe( 'iterate from start position `startPosition`', () => {
- let expected;
- beforeEach( () => {
- expected = [
- { type: 'ELEMENT_START', item: img1 },
- { type: 'ELEMENT_END', item: img1 },
- { type: 'ELEMENT_START', item: paragraph },
- { type: 'ELEMENT_START', item: bold },
- { type: 'TEXT', text: 'abcd' },
- { type: 'ELEMENT_END', item: bold },
- { type: 'TEXT', text: 'y' },
- { type: 'ELEMENT_START', item: img2 },
- { type: 'ELEMENT_END', item: img2 },
- { type: 'TEXT', text: 'x' },
- { type: 'ELEMENT_END', item: paragraph }
- ];
- } );
- it( 'should provide iterator interface with default FORWARD direction', () => {
- let iterator = new TreeWalker( { startPosition: rootBeginning } );
- let i = 0;
- for ( let value of iterator ) {
- expectValue( value, expected[ i++ ] );
- }
- expect( i ).to.equal( expected.length );
- } );
- it( 'should provide iterator interface with FORWARD direction', () => {
- let iterator = new TreeWalker( { startPosition: rootBeginning, direction: 'FORWARD' } );
- let i = 0;
- for ( let value of iterator ) {
- expectValue( value, expected[ i++ ] );
- }
- expect( i ).to.equal( expected.length );
- } );
- it( 'should provide iterator interface which BACKWARD direction', () => {
- let iterator = new TreeWalker( { startPosition: rootEnding, direction: 'BACKWARD' } );
- let i = expected.length;
- for ( let value of iterator ) {
- expectValue( value, expected[ --i ], { direction: 'BACKWARD' } );
- }
- expect( i ).to.equal( 0 );
- } );
- it( 'should start iterating at the startPosition witch is not a root bound', () => {
- let iterator = new TreeWalker( { startPosition: new Position( root, 1 ) } );
- let i = 2;
- for ( let value of iterator ) {
- expectValue( value, expected[ i++ ] );
- }
- expect( i ).to.equal( expected.length );
- } );
- it( 'should start iterating at the startPosition witch is not a root bound, going backward', () => {
- let expected = [
- { type: 'ELEMENT_START', item: img1 },
- { type: 'ELEMENT_END', item: img1 }
- ];
- let iterator = new TreeWalker( { startPosition: new Position( root, 1 ), direction: 'BACKWARD' } );
- let i = expected.length;
- for ( let value of iterator ) {
- expectValue( value, expected[ --i ], { direction: 'BACKWARD' } );
- }
- expect( i ).to.equal( 0 );
- } );
- } );
- describe( 'iterate trough the range `boundary`', () => {
- describe( 'range starts between elements', () => {
- let expected, range;
- before( () => {
- expected = [
- { type: 'ELEMENT_START', item: paragraph },
- { type: 'ELEMENT_START', item: bold },
- { type: 'TEXT', text: 'abcd' },
- { type: 'ELEMENT_END', item: bold },
- { type: 'TEXT', text: 'y' },
- { type: 'ELEMENT_START', item: img2 },
- { type: 'ELEMENT_END', item: img2 }
- ];
- range = Range.createFromParentsAndOffsets( root, 1, paragraph, 3 );
- } );
- it( 'should iterating over the range', () => {
- let iterator = new TreeWalker( { boundaries: range } );
- let i = 0;
- for ( let value of iterator ) {
- expectValue( value, expected[ i++ ] );
- }
- expect( i ).to.equal( expected.length );
- } );
- it( 'should iterating over the range going backward', () => {
- let iterator = new TreeWalker( { boundaries: range, direction: 'BACKWARD' } );
- let i = expected.length;
- for ( let value of iterator ) {
- expectValue( value, expected[ --i ], { direction: 'BACKWARD' } );
- }
- expect( i ).to.equal( 0 );
- } );
- } );
- describe( 'range starts inside the text', () => {
- let expected, range;
- before( () => {
- expected = [
- { type: 'TEXT', text: 'bcd' },
- { type: 'ELEMENT_END', item: bold },
- { type: 'TEXT', text: 'y' },
- { type: 'ELEMENT_START', item: img2 },
- { type: 'ELEMENT_END', item: img2 }
- ];
- range = Range.createFromParentsAndOffsets( textAbcd, 1, paragraph, 3 );
- } );
- it( 'should return part of the text', () => {
- let iterator = new TreeWalker( { boundaries: range } );
- let i = 0;
- for ( let value of iterator ) {
- expectValue( value, expected[ i++ ] );
- }
- expect( i ).to.equal( expected.length );
- } );
- it( 'should return part of the text going backward', () => {
- let iterator = new TreeWalker( {
- boundaries: range,
- direction: 'BACKWARD'
- }
- );
- let i = expected.length;
- for ( let value of iterator ) {
- expectValue( value, expected[ --i ], { direction: 'BACKWARD' } );
- }
- expect( i ).to.equal( 0 );
- } );
- } );
- describe( 'range ends inside the text', () => {
- let expected, range;
- before( () => {
- expected = [
- { type: 'ELEMENT_START', item: img1 },
- { type: 'ELEMENT_END', item: img1 },
- { type: 'ELEMENT_START', item: paragraph },
- { type: 'ELEMENT_START', item: bold },
- { type: 'TEXT', text: 'ab' }
- ];
- range = new Range( rootBeginning, new Position( textAbcd, 2 ) );
- } );
- it( 'should return part of the text', () => {
- let iterator = new TreeWalker( { boundaries: range } );
- let i = 0;
- for ( let value of iterator ) {
- expectValue( value, expected[ i++ ] );
- }
- expect( i ).to.equal( expected.length );
- } );
- it( 'should return part of the text going backward', () => {
- let iterator = new TreeWalker( {
- boundaries: range,
- startPosition: range.end,
- direction: 'BACKWARD'
- } );
- let i = expected.length;
- for ( let value of iterator ) {
- expectValue( value, expected[ --i ], { direction: 'BACKWARD' } );
- }
- expect( i ).to.equal( 0 );
- } );
- } );
- describe( 'range starts and ends inside the same text', () => {
- let expected, range;
- before( () => {
- expected = [
- { type: 'TEXT', text: 'bc' }
- ];
- range = new Range( new Position( textAbcd, 1 ), new Position( textAbcd, 3 ) );
- } );
- it( 'should return part of the text', () => {
- let iterator = new TreeWalker( { boundaries: range } );
- let i = 0;
- for ( let value of iterator ) {
- expectValue( value, expected[ i++ ] );
- }
- expect( i ).to.equal( expected.length );
- } );
- it( 'should return part of the text going backward', () => {
- let iterator = new TreeWalker( {
- boundaries: range,
- startPosition: range.end,
- direction: 'BACKWARD'
- } );
- let i = expected.length;
- for ( let value of iterator ) {
- expectValue( value, expected[ --i ], { direction: 'BACKWARD' } );
- }
- expect( i ).to.equal( 0 );
- } );
- } );
- describe( 'custom start position', () => {
- it( 'should iterating from the start position', () => {
- let expected = [
- { type: 'TEXT', text: 'y' },
- { type: 'ELEMENT_START', item: img2 },
- { type: 'ELEMENT_END', item: img2 }
- ];
- let range = Range.createFromParentsAndOffsets( bold, 1, paragraph, 3 );
- let iterator = new TreeWalker( {
- boundaries: range,
- startPosition: new Position( paragraph, 1 )
- } );
- let i = 0;
- for ( let value of iterator ) {
- expectValue( value, expected[ i++ ] );
- }
- expect( i ).to.equal( expected.length );
- } );
- it( 'should iterating from the start position going backward', () => {
- let expected = [
- { type: 'TEXT', text: 'y' },
- { type: 'ELEMENT_END', item: bold },
- { type: 'TEXT', text: 'bcd' }
- ];
- let range = new Range( new Position( textAbcd, 1 ), new Position( paragraph, 3 ) );
- let iterator = new TreeWalker( {
- boundaries: range,
- startPosition: new Position( paragraph, 2 ),
- direction: 'BACKWARD'
- } );
- let i = 0;
- for ( let value of iterator ) {
- expectValue( value, expected[ i++ ], { direction: 'BACKWARD' } );
- }
- expect( i ).to.equal( expected.length );
- } );
- } );
- } );
- describe( 'iterate by every single characters `singleCharacter`', () => {
- describe( 'whole root', () => {
- let expected;
- before( () => {
- expected = [
- { type: 'ELEMENT_START', item: img1 },
- { type: 'ELEMENT_END', item: img1 },
- { type: 'ELEMENT_START', item: paragraph },
- { type: 'ELEMENT_START', item: bold },
- { type: 'TEXT', text: 'a' },
- { type: 'TEXT', text: 'b' },
- { type: 'TEXT', text: 'c' },
- { type: 'TEXT', text: 'd' },
- { type: 'ELEMENT_END', item: bold },
- { type: 'TEXT', text: 'y' },
- { type: 'ELEMENT_START', item: img2 },
- { type: 'ELEMENT_END', item: img2 },
- { type: 'TEXT', text: 'x' },
- { type: 'ELEMENT_END', item: paragraph }
- ];
- } );
- it( 'should return single characters', () => {
- let iterator = new TreeWalker( { startPosition: rootBeginning, singleCharacters: true } );
- let i = 0;
- for ( let value of iterator ) {
- expectValue( value, expected[ i++ ] );
- }
- expect( i ).to.equal( expected.length );
- } );
- it( 'should return single characters going backward', () => {
- let iterator = new TreeWalker( {
- startPosition: rootEnding,
- singleCharacters: true,
- direction: 'BACKWARD'
- } );
- let i = expected.length;
- for ( let value of iterator ) {
- expectValue( value, expected[ --i ], { direction: 'BACKWARD' } );
- }
- expect( i ).to.equal( 0 );
- } );
- } );
- describe( 'range', () => {
- let range, expected;
- before( () => {
- expected = [
- { type: 'TEXT', text: 'a' },
- { type: 'TEXT', text: 'b' },
- { type: 'TEXT', text: 'c' },
- { type: 'TEXT', text: 'd' },
- { type: 'ELEMENT_END', item: bold },
- { type: 'TEXT', text: 'y' },
- { type: 'ELEMENT_START', item: img2 }
- ];
- range = new Range( new Position( bold, 0 ), new Position( img2, 0 ) );
- } );
- it( 'should respect boundaries', () => {
- let iterator = new TreeWalker( { boundaries: range, singleCharacters: true } );
- let i = 0;
- for ( let value of iterator ) {
- expectValue( value, expected[ i++ ] );
- }
- expect( i ).to.equal( expected.length );
- } );
- it( 'should respect boundaries going backward', () => {
- let iterator = new TreeWalker( {
- boundaries: range,
- singleCharacters: true,
- direction: 'BACKWARD'
- } );
- let i = expected.length;
- for ( let value of iterator ) {
- expectValue( value, expected[ --i ], { direction: 'BACKWARD' } );
- }
- expect( i ).to.equal( 0 );
- } );
- } );
- } );
- describe( 'iterate omitting child nodes and ELEMENT_END `shallow`', () => {
- let expected;
- before( () => {
- expected = [
- { type: 'ELEMENT_START', item: img1 },
- { type: 'ELEMENT_START', item: paragraph }
- ];
- } );
- it( 'should not enter elements', () => {
- let iterator = new TreeWalker( { startPosition: rootBeginning, shallow: true } );
- let i = 0;
- for ( let value of iterator ) {
- expectValue( value, expected[ i++ ], { shallow: true } );
- }
- expect( i ).to.equal( expected.length );
- } );
- it( 'should not enter elements going backward', () => {
- let iterator = new TreeWalker( { startPosition: rootEnding, shallow: true, direction: 'BACKWARD' } );
- let i = expected.length;
- for ( let value of iterator ) {
- expectValue( value, expected[ --i ], { shallow: true, direction: 'BACKWARD' } );
- }
- expect( i ).to.equal( 0 );
- } );
- } );
- describe( 'iterate omitting ELEMENT_END `ignoreElementEnd`', () => {
- describe( 'merged text', () => {
- let expected;
- before( () => {
- expected = [
- { type: 'ELEMENT_START', item: img1 },
- { type: 'ELEMENT_START', item: paragraph },
- { type: 'ELEMENT_START', item: bold },
- { type: 'TEXT', text: 'abcd' },
- { type: 'TEXT', text: 'y' },
- { type: 'ELEMENT_START', item: img2 },
- { type: 'TEXT', text: 'x' }
- ];
- } );
- it( 'should iterate ignoring ELEMENT_END', () => {
- let iterator = new TreeWalker( { startPosition: rootBeginning, ignoreElementEnd: true } );
- let i = 0;
- for ( let value of iterator ) {
- expectValue( value, expected[ i++ ] );
- }
- expect( i ).to.equal( expected.length );
- } );
- it( 'should iterate ignoring ELEMENT_END going backward', () => {
- let iterator = new TreeWalker( {
- startPosition: rootEnding,
- ignoreElementEnd: true,
- direction: 'BACKWARD'
- } );
- let i = expected.length;
- for ( let value of iterator ) {
- expectValue( value, expected[ --i ], { direction: 'BACKWARD' } );
- }
- expect( i ).to.equal( 0 );
- } );
- } );
- describe( 'single character', () => {
- let expected;
- before( () => {
- expected = [
- { type: 'ELEMENT_START', item: img1 },
- { type: 'ELEMENT_START', item: paragraph },
- { type: 'ELEMENT_START', item: bold },
- { type: 'TEXT', text: 'a' },
- { type: 'TEXT', text: 'b' },
- { type: 'TEXT', text: 'c' },
- { type: 'TEXT', text: 'd' },
- { type: 'TEXT', text: 'y' },
- { type: 'ELEMENT_START', item: img2 },
- { type: 'TEXT', text: 'x' }
- ];
- } );
- it( 'should return single characters ignoring ELEMENT_END', () => {
- let iterator = new TreeWalker( {
- startPosition: rootBeginning,
- singleCharacters: true,
- ignoreElementEnd: true
- } );
- let i = 0;
- for ( let value of iterator ) {
- expectValue( value, expected[ i++ ] );
- }
- expect( i ).to.equal( expected.length );
- } );
- it( 'should return single characters ignoring ELEMENT_END going backward', () => {
- let iterator = new TreeWalker( {
- startPosition: rootEnding,
- singleCharacters: true,
- ignoreElementEnd: true,
- direction: 'BACKWARD'
- } );
- let i = expected.length;
- for ( let value of iterator ) {
- expectValue( value, expected[ --i ], { direction: 'BACKWARD' } );
- }
- expect( i ).to.equal( 0 );
- } );
- } );
- } );
- } );
- function expectValue( value, expected, options = {} ) {
- expect( value.type ).to.equal( expected.type );
- if ( value.type == 'TEXT' ) {
- expectText( value, expected, options );
- } else if ( value.type == 'ELEMENT_START' ) {
- expectStart( value, expected, options );
- } else if ( value.type == 'ELEMENT_END' ) {
- expectEnd( value, expected, options );
- }
- }
- function expectText( value, expected ) {
- expect( value.item._data ).to.equal( expected.text );
- expect( value.length ).to.equal( value.item._data.length );
- }
- function expectStart( value, expected ) {
- expect( value.item ).to.equal( expected.item );
- expect( value.length ).to.equal( 1 );
- }
- function expectEnd( value, expected ) {
- expect( value.item ).to.equal( expected.item );
- expect( value.length ).to.be.undefined;
- }
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