openclosetagexpander.java

来自「Wicket一个开发Java Web应用程序框架。它使得开发web应用程序变得容」· Java 代码 · 共 72 行

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.wicket.markup.parser.filter;

import java.text.ParseException;
import java.util.Arrays;
import java.util.List;

import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.MarkupElement;
import org.apache.wicket.markup.parser.AbstractMarkupFilter;
import org.apache.wicket.markup.parser.XmlTag;

/**
 * MarkupFilter that expands certain open-close tag as separate open and close tags. Firefox, unless
 * it gets text/xml mime type, treats these open-close tags as open tags which results in corrupted
 * DOM. This happens even with xhtml doctype.
 * 
 * @author Matej Knopp
 */
public class OpenCloseTagExpander extends AbstractMarkupFilter
{
	ComponentTag next = null;
	private static final List replaceForTags = Arrays.asList(new String[] { "div", "span", "p",
			"strong", "b", "e" });

	public MarkupElement nextTag() throws ParseException
	{
		if (next != null)
		{
			MarkupElement tmp = next;
			next = null;
			return tmp;
		}
		else
		{
			ComponentTag tag = nextComponentTag();

			if (tag != null && tag.isOpenClose() &&
				replaceForTags.contains(tag.getName().toLowerCase()))
			{
				tag.setType(XmlTag.OPEN);

				if (tag.getId() == null)
				{
					tag.setId(WicketMessageTagHandler.WICKET_MESSAGE_CONTAINER_ID);
					tag.setAutoComponentTag(true);
				}

				next = new ComponentTag(tag.getName(), XmlTag.CLOSE);
				next.setNamespace(tag.getNamespace());
				next.setOpenTag(tag);
			}
			return tag;
		}
	}
}