embeddedportletheaderresponse.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 119 行

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/* * 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.protocol.http.portlet;import java.util.Arrays;import java.util.List;import org.apache.wicket.RequestContext;import org.apache.wicket.Response;import org.apache.wicket.markup.html.internal.HeaderResponse;import org.apache.wicket.response.StringResponse;/** * @author Ate Douma */public class EmbeddedPortletHeaderResponse extends HeaderResponse{	private Response realResponse;	private StringResponse bufferedResponse;	public EmbeddedPortletHeaderResponse(Response realResponse)	{		this.realResponse = realResponse;		bufferedResponse = new StringResponse();	}	public void renderCSSReference(String url, String media)	{		if (!isClosed())		{			List token = Arrays.asList(new Object[] { "css", url, media });			if (wasRendered(token) == false)			{				getResponse().write("<script type=\"text/javascript\">");				getResponse().write("var elem=document.createElement(\"link\");");				getResponse().write("elem.setAttribute(\"rel\",\"stylesheet\");");				getResponse().write("elem.setAttribute(\"type\",\"text/css\");");				getResponse().write("elem.setAttribute(\"href\",\"" + url + "\");");				if (media != null)				{					getResponse().write("elem.setAttribute(\"media\",\"" + media + "\");");				}				getResponse()						.write("document.getElementsByTagName(\"head\")[0].appendChild(elem);");				getResponse().println("</script>");				markRendered(token);			}		}	}	/**	 * @see org.apache.wicket.markup.html.internal.HeaderResponse#close()	 */	public void close()	{		super.close();		// Automatically add <head> if necessary		CharSequence output = bufferedResponse.getBuffer();		if (output.length() > 0)		{			if (output.charAt(0) == '\r')			{				for (int i = 2; i < output.length(); i += 2)				{					char ch = output.charAt(i);					if (ch != '\r')					{						output = output.subSequence(i - 2, output.length());						break;					}				}			}			else if (output.charAt(0) == '\n')			{				for (int i = 1; i < output.length(); i++)				{					char ch = output.charAt(i);					if (ch != '\n')					{						output = output.subSequence(i - 1, output.length());						break;					}				}			}		}		if (output.length() > 0)		{			realResponse.write("<span id=\"" + RequestContext.get().getNamespace() +					"_embedded_head\" style=\"display:none\">");			realResponse.write(output);			realResponse.write("</span>");		}		bufferedResponse.reset();	}	/**	 * @see org.apache.wicket.markup.html.internal.HeaderResponse#getRealResponse()	 */	protected Response getRealResponse()	{		return bufferedResponse;	}}

embeddedportletheaderresponse.java - 源码说明

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