001// Copyright 2004, 2005 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 015package org.apache.tapestry.wml; 016 017import org.apache.hivemind.ApplicationRuntimeException; 018import org.apache.hivemind.HiveMind; 019import org.apache.tapestry.AbstractComponent; 020import org.apache.tapestry.IMarkupWriter; 021import org.apache.tapestry.IRequestCycle; 022import org.apache.tapestry.Tapestry; 023 024/** 025 * A deck contains a collection of cards. There is a variety of card types, each specifying a 026 * different mode of user interaction. 027 * 028 * @author David Solis 029 * @since 3.0 030 */ 031 032public abstract class Card extends AbstractComponent 033{ 034 private static final String ATTRIBUTE_NAME = "org.apache.tapestry.wml.Card"; 035 036 /** 037 * @see AbstractComponent#renderComponent(IMarkupWriter, IRequestCycle) 038 */ 039 040 protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) 041 { 042 if (cycle.getAttribute(ATTRIBUTE_NAME) != null) 043 throw new ApplicationRuntimeException(Tapestry.getMessage("Card.cards-may-not-nest"), 044 this, null, null); 045 046 cycle.setAttribute(ATTRIBUTE_NAME, this); 047 048 writer.begin("card"); 049 050 String title = getTitle(); 051 if (HiveMind.isNonBlank(title)) 052 writer.attribute("title", title); 053 054 renderInformalParameters(writer, cycle); 055 056 IMarkupWriter nestedWriter = writer.getNestedWriter(); 057 058 renderBody(nestedWriter, cycle); 059 060 nestedWriter.close(); 061 062 writer.end(); 063 064 cycle.removeAttribute(ATTRIBUTE_NAME); 065 } 066 067 public abstract String getTitle(); 068}