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- /**
- * @license Copyright (c) 2003-2020, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
- */
- /**
- * @module enter/utils
- */
- /**
- * Returns attributes that should be preserved on the enter key.
- *
- * Filtering is realized based on `copyOnEnter` attribute property. Read more about attribute properties
- * {@link module:engine/model/schema~Schema#setAttributeProperties here}.
- *
- * @param {module:engine/model/schema~Schema} schema
- * @param {Iterable.<*>} allAttributes attributes to filter.
- * @returns {Iterable.<*>}
- */
- export function* getCopyOnEnterAttributes( schema, allAttributes ) {
- for ( const attribute of allAttributes ) {
- if ( attribute && schema.getAttributeProperties( attribute[ 0 ] ).copyOnEnter ) {
- yield attribute;
- }
- }
- }
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