    001// Licensed under the Apache License, Version 2.0 (the "License");
    002// you may not use this file except in compliance with the License.
    003// You may obtain a copy of the License at
    004//
    005//     http://www.apache.org/licenses/LICENSE-2.0
    006//
    007// Unless required by applicable law or agreed to in writing, software
    008// distributed under the License is distributed on an "AS IS" BASIS,
    009// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    010// See the License for the specific language governing permissions and
    011// limitations under the License.
    012
    013package org.apache.tapestry5.services;
    014
    015import org.apache.tapestry5.dom.Element;
    016import org.apache.tapestry5.ioc.annotations.UsesMappedConfiguration;
    017
    018/**
    019 * Provides some assistance in determining <em>where</em> to place a hidden field based on standard (X)HTML elements.
    020 *
    021 * The service works based on a mapped service contribution; keys are the element names, values area {@link
    022 * org.apache.tapestry5.services.RelativeElementPosition}.
    023 */
    024@UsesMappedConfiguration(RelativeElementPosition.class)
    025public interface HiddenFieldLocationRules
    026{
    027    /**
    028     * Checks the element to see if a hidden field may be placed inside the element.
    029     */
    030    boolean placeHiddenFieldInside(Element element);
    031
    032    /**
    033     * Checks the element to see if a hidden field may be placed after the element (as a sibling element).
    034     */
    035    boolean placeHiddenFieldAfter(Element element);
    036}