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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 link/findlinkrange
- */
- /**
- * Returns a range containing the entire link in which the given `position` is placed.
- *
- * It can be used e.g. to get the entire range on which the `linkHref` attribute needs to be changed when having a
- * selection inside a link.
- *
- * @param {module:engine/model/position~Position} position The start position.
- * @param {String} value The `linkHref` attribute value.
- * @returns {module:engine/model/range~Range} The link range.
- */
- export default function findLinkRange( position, value, model ) {
- return model.createRange( _findBound( position, value, true, model ), _findBound( position, value, false, model ) );
- }
- // Walks forward or backward (depends on the `lookBack` flag), node by node, as long as they have the same `linkHref` attribute value
- // and returns a position just before or after (depends on the `lookBack` flag) the last matched node.
- //
- // @param {module:engine/model/position~Position} position The start position.
- // @param {String} value The `linkHref` attribute value.
- // @param {Boolean} lookBack Whether the walk direction is forward (`false`) or backward (`true`).
- // @returns {module:engine/model/position~Position} The position just before the last matched node.
- function _findBound( position, value, lookBack, model ) {
- // Get node before or after position (depends on `lookBack` flag).
- // When position is inside text node then start searching from text node.
- let node = position.textNode || ( lookBack ? position.nodeBefore : position.nodeAfter );
- let lastNode = null;
- while ( node && node.getAttribute( 'linkHref' ) == value ) {
- lastNode = node;
- node = lookBack ? node.previousSibling : node.nextSibling;
- }
- return lastNode ? model.createPositionAt( lastNode, lookBack ? 'before' : 'after' ) : position;
- }
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