nz.net.ultraq.thymeleaf.layoutdialect.decorators.strategies.AppendingStrategy.groovy Maven / Gradle / Ivy

/* 
 * Copyright 2019, Emanuel Rabina (http://www.ultraq.net.nz/)
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package nz.net.ultraq.thymeleaf.layoutdialect.decorators.strategies

import nz.net.ultraq.thymeleaf.layoutdialect.decorators.SortingStrategy

import org.thymeleaf.model.IModel

/**
 * The standard {@code } merging strategy, which simply appends the
 * content elements to the layout ones.
 * 
 * @author Emanuel Rabina
 * @since 2.4.0
 */
class AppendingStrategy implements SortingStrategy {

	/**
	 * Returns the position at the end of the {@code } section.
	 * 
	 * @param headModel
	 * @param event
	 * @return The end of the head model.
	 */
	int findPositionForModel(IModel headModel, IModel childModel) {

		// Discard text/whitespace nodes
		if (childModel.whitespace) {
			return -1
		}

		def positions = headModel.size()
		return positions - (positions > 2 ? 2 : 1)
	}
}