001/* 002 * All rights reserved. This program and the accompanying materials 003 * are made available under the terms of the GNU Lesser General Public License 004 * (LGPL) version 2.1 which accompanies this distribution, and is available at 005 * http://www.gnu.org/licenses/lgpl.html 006 * 007 * This library is distributed in the hope that it will be useful, 008 * but WITHOUT ANY WARRANTY; without even the implied warranty of 009 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 010 * Lesser General Public License for more details. 011 * 012 * Contributors: 013 * Original file from org.jboss.seam.pdf.ui.UIHtmlText.java in jboss-seam-pdf 014 * Anahide Tchertchian 015 */ 016package org.nuxeo.ecm.platform.ui.web.component.seam; 017 018import java.io.IOException; 019import java.io.StringReader; 020import java.io.StringWriter; 021import java.util.HashMap; 022 023import javax.faces.context.FacesContext; 024import javax.faces.context.ResponseWriter; 025import javax.servlet.http.HttpServletRequest; 026 027import org.apache.commons.logging.Log; 028import org.apache.commons.logging.LogFactory; 029import org.jboss.seam.ui.util.JSF; 030 031import com.lowagie.text.html.simpleparser.HTMLWorker; 032import com.lowagie.text.html.simpleparser.StyleSheet; 033 034/** 035 * Overrides basic p:html tag to use {@link NuxeoITextImageProvider} to resolve image resources. 036 * 037 * @since 5.4.2 038 */ 039public class UIHtmlText extends org.jboss.seam.pdf.ui.UIHtmlText { 040 041 private static final Log log = LogFactory.getLog(UIHtmlText.class); 042 043 @Override 044 public void encodeChildren(FacesContext context) throws IOException { 045 ResponseWriter writer = context.getResponseWriter(); 046 047 StringWriter stringWriter = new StringWriter(); 048 ResponseWriter cachingResponseWriter = writer.cloneWithWriter(stringWriter); 049 context.setResponseWriter(cachingResponseWriter); 050 JSF.renderChildren(context, this); 051 context.setResponseWriter(writer); 052 053 String output = stringWriter.getBuffer().toString(); 054 addFromHtml(output, context); 055 } 056 057 @Override 058 public void encodeEnd(FacesContext context) throws IOException { 059 Object value = getValue(); 060 if (value != null) { 061 addFromHtml(convert(context, value), context); 062 } 063 super.encodeEnd(context); 064 } 065 066 private void addFromHtml(String html, FacesContext context) { 067 HashMap<String, Object> interfaceProps = new HashMap<String, Object>(); 068 interfaceProps.put("img_provider", new NuxeoITextImageProvider( 069 (HttpServletRequest) context.getExternalContext().getRequest())); 070 071 try { 072 for (Object o : HTMLWorker.parseToList(new StringReader(html), getStyle(), interfaceProps)) { 073 addToITextParent(o); 074 } 075 } catch (IOException e) { 076 // XXX avoid crash when rendering an image with resource not found 077 log.error("Error converting HTML to PDF", e); 078 } 079 } 080 081 /** 082 * XXX - this needs some work 083 */ 084 private StyleSheet getStyle() { 085 StyleSheet styles = new StyleSheet(); 086 styles.loadTagStyle("body", "leading", "16,0"); 087 return styles; 088 } 089 090}