1 /** 2 * $RCSfile$ 3 * $Revision$ 4 * $Date$ 5 * 6 * Copyright 2003-2007 Jive Software. 7 * 8 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License"); 9 * you may not use this file except in compliance with the License. 10 * You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21 package org.jivesoftware.smackx.provider; 22 23 import org.jivesoftware.smack.packet.PacketExtension; 24 import org.jivesoftware.smack.provider.PacketExtensionProvider; 25 import org.jivesoftware.smack.util.StringUtils; 26 import org.jivesoftware.smackx.packet.XHTMLExtension; 27 import org.xmlpull.v1.XmlPullParser; 28 29 /** 30 * The XHTMLExtensionProvider parses XHTML packets. 31 * 32 * @author Gaston Dombiak 33 */ 34 public class XHTMLExtensionProvider implements PacketExtensionProvider { 35 36 /** 37 * Creates a new XHTMLExtensionProvider. 38 * ProviderManager requires that every PacketExtensionProvider has a public, no-argument constructor 39 */ XHTMLExtensionProvider()40 public XHTMLExtensionProvider() { 41 } 42 43 /** 44 * Parses a XHTMLExtension packet (extension sub-packet). 45 * 46 * @param parser the XML parser, positioned at the starting element of the extension. 47 * @return a PacketExtension. 48 * @throws Exception if a parsing error occurs. 49 */ parseExtension(XmlPullParser parser)50 public PacketExtension parseExtension(XmlPullParser parser) 51 throws Exception { 52 XHTMLExtension xhtmlExtension = new XHTMLExtension(); 53 boolean done = false; 54 StringBuilder buffer = new StringBuilder(); 55 int startDepth = parser.getDepth(); 56 int depth = parser.getDepth(); 57 String lastTag = ""; 58 while (!done) { 59 int eventType = parser.next(); 60 if (eventType == XmlPullParser.START_TAG) { 61 if (parser.getName().equals("body")) { 62 buffer = new StringBuilder(); 63 depth = parser.getDepth(); 64 } 65 lastTag = parser.getText(); 66 buffer.append(parser.getText()); 67 } else if (eventType == XmlPullParser.TEXT) { 68 if (buffer != null) { 69 // We need to return valid XML so any inner text needs to be re-escaped 70 buffer.append(StringUtils.escapeForXML(parser.getText())); 71 } 72 } else if (eventType == XmlPullParser.END_TAG) { 73 if (parser.getName().equals("body") && parser.getDepth() <= depth) { 74 buffer.append(parser.getText()); 75 xhtmlExtension.addBody(buffer.toString()); 76 } 77 else if (parser.getName().equals(xhtmlExtension.getElementName()) 78 && parser.getDepth() <= startDepth) { 79 done = true; 80 } 81 else { 82 // This is a check for tags that are both a start and end tag like <br/> 83 // So that they aren't doubled 84 if(lastTag == null || !lastTag.equals(parser.getText())) { 85 buffer.append(parser.getText()); 86 } 87 } 88 } 89 } 90 91 return xhtmlExtension; 92 } 93 94 } 95