/** * @license Copyright (c) 2003-2016, CKSource - Frederico Knabben. All rights reserved. * For licensing, see LICENSE.md. */ 'use strict'; import TreeWalker from '/ckeditor5/engine/treemodel/treewalker.js'; const utils = { /** * Returns tree structure as a simplified string. Elements are uppercase and characters are lowercase. * Start and end of an element is marked the same way, by the element's name (in uppercase). * * let element = new Element( 'div', [], [ 'abc', new Element( 'p', [], 'foo' ), 'xyz' ] ); * treemodelUtils.getNodesAndText( element ); // abcPfooPxyz * * @param {engine.treeModel.Range} range Range to stringify. * @returns {String} String representing element inner structure. */ getNodesAndText( range ) { let txt = ''; const treeWalker = new TreeWalker( { boundaries: range } ); for ( let value of treeWalker ) { let node = value.item; let nodeText = node.text || node.character; if ( nodeText ) { txt += nodeText.toLowerCase(); } else { txt += node.name.toUpperCase(); } } return txt; } }; export default utils;