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 }