    001    //  Copyright 2008 The Apache Software Foundation
    002    //
    003    // Licensed under the Apache License, Version 2.0 (the "License");
    004    // you may not use this file except in compliance with the License.
    005    // You may obtain a copy of the License at
    006    //
    007    //     http://www.apache.org/licenses/LICENSE-2.0
    008    //
    009    // Unless required by applicable law or agreed to in writing, software
    010    // distributed under the License is distributed on an "AS IS" BASIS,
    011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012    // See the License for the specific language governing permissions and
    013    // limitations under the License.
    014
    015    package org.apache.tapestry5.services;
    016
    017    import org.apache.tapestry5.dom.Element;
    018    import org.apache.tapestry5.ioc.annotations.UsesMappedConfiguration;
    019
    020    /**
    021     * Provides some assistance in determining <em>where</em> to place a hidden field based on standard (X)HTML elements.
    022     * <p/>
    023     * The service works based on a mapped service contribution; keys are the element names, values area {@link
    024     * org.apache.tapestry5.services.RelativeElementPosition}.
    025     */
    026    @UsesMappedConfiguration(RelativeElementPosition.class)
    027    public interface HiddenFieldLocationRules
    028    {
    029        /**
    030         * Checks the element to see if a hidden field may be placed inside the element.
    031         */
    032        boolean placeHiddenFieldInside(Element element);
    033
    034        /**
    035         * Checks the element to see if a hidden field may be placed after the element (as a sibling element).
    036         */
    037        boolean placeHiddenFieldAfter(Element element);
    038    }