Shuyi Chen | d7955ce | 2013-05-22 14:51:55 -0700 | [diff] [blame] | 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 | */ |
| 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 | */ |
| 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 | } |