Java tutorial
/* * $Id: SAXmyHtmlHandler.java 3373 2008-05-12 16:21:24Z xlv $ * * Copyright 2001, 2002 by Bruno Lowagie. * * The contents of this file are subject to the Mozilla Public License Version 1.1 * (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.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the License. * * The Original Code is 'iText, a free JAVA-PDF library'. * * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie. * All Rights Reserved. * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved. * * Contributor(s): all the names of the contributors are added in the source code * where applicable. * * Alternatively, the contents of this file may be used under the terms of the * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the * provisions of LGPL are applicable instead of those above. If you wish to * allow use of your version of this file only under the terms of the LGPL * License and not to allow others to use your version of this file under * the MPL, indicate your decision by deleting the provisions above and * replace them with the notice and other provisions required by the LGPL. * If you do not delete the provisions above, a recipient may use your version * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE. * * This library is free software; you can redistribute it and/or modify it * under the terms of the MPL as stated above or under the terms of the GNU * Library General Public License as published by the Free Software Foundation; * either version 2 of the License, or any later version. * * This library is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more * details. * * If you didn't download this code from the following link, you should check if * you aren't using an obsolete version: * http://www.lowagie.com/iText/ */ package com.lowagie.text.html; import java.util.HashMap; import java.util.Properties; import org.xml.sax.Attributes; import com.lowagie.text.DocListener; import com.lowagie.text.DocumentException; import com.lowagie.text.Element; import com.lowagie.text.ElementTags; import com.lowagie.text.ExceptionConverter; import com.lowagie.text.pdf.BaseFont; import com.lowagie.text.xml.SAXiTextHandler; import com.lowagie.text.xml.XmlPeer; /** * The <CODE>Tags</CODE>-class maps several XHTML-tags to iText-objects. */ public class SAXmyHtmlHandler extends SAXiTextHandler // SAXmyHandler { /** These are the properties of the body section. */ private Properties bodyAttributes = new Properties(); /** This is the status of the table border. */ private boolean tableBorder = false; /** * Constructs a new SAXiTextHandler that will translate all the events * triggered by the parser to actions on the <CODE>Document</CODE>-object. * * @param document * this is the document on which events must be triggered */ public SAXmyHtmlHandler(DocListener document) { super(document, new HtmlTagMap()); } /** * Constructs a new SAXiTextHandler that will translate all the events * triggered by the parser to actions on the <CODE>Document</CODE>-object. * * @param document * this is the document on which events must be triggered * @param bf */ public SAXmyHtmlHandler(DocListener document, BaseFont bf) { super(document, new HtmlTagMap(), bf); } /** * Constructs a new SAXiTextHandler that will translate all the events * triggered by the parser to actions on the <CODE>Document</CODE>-object. * * @param document * this is the document on which events must be triggered * @param htmlTags * a tagmap translating HTML tags to iText tags */ public SAXmyHtmlHandler(DocListener document, HashMap htmlTags) { super(document, htmlTags); } /** * This method gets called when a start tag is encountered. * * @param uri * the Uniform Resource Identifier * @param lname * the local name (without prefix), or the empty string if * Namespace processing is not being performed. * @param name * the name of the tag that is encountered * @param attrs * the list of attributes */ public void startElement(String uri, String lname, String name, Attributes attrs) { // System.err.println("Start: " + name); // super.handleStartingTags is replaced with handleStartingTags // suggestion by Vu Ngoc Tan/Hop name = name.toLowerCase(); if (HtmlTagMap.isHtml(name)) { // we do nothing return; } if (HtmlTagMap.isHead(name)) { // we do nothing return; } if (HtmlTagMap.isTitle(name)) { // we do nothing return; } if (HtmlTagMap.isMeta(name)) { // we look if we can change the body attributes String meta = null; String content = null; if (attrs != null) { for (int i = 0; i < attrs.getLength(); i++) { String attribute = attrs.getQName(i); if (attribute.equalsIgnoreCase(HtmlTags.CONTENT)) content = attrs.getValue(i); else if (attribute.equalsIgnoreCase(HtmlTags.NAME)) meta = attrs.getValue(i); } } if (meta != null && content != null) { bodyAttributes.put(meta, content); } return; } if (HtmlTagMap.isLink(name)) { // we do nothing for the moment, in a later version we could extract // the style sheet return; } if (HtmlTagMap.isBody(name)) { // maybe we could extract some info about the document: color, // margins,... // but that's for a later version... XmlPeer peer = new XmlPeer(ElementTags.ITEXT, name); peer.addAlias(ElementTags.TOP, HtmlTags.TOPMARGIN); peer.addAlias(ElementTags.BOTTOM, HtmlTags.BOTTOMMARGIN); peer.addAlias(ElementTags.RIGHT, HtmlTags.RIGHTMARGIN); peer.addAlias(ElementTags.LEFT, HtmlTags.LEFTMARGIN); bodyAttributes.putAll(peer.getAttributes(attrs)); handleStartingTags(peer.getTag(), bodyAttributes); return; } if (myTags.containsKey(name)) { XmlPeer peer = (XmlPeer) myTags.get(name); if (ElementTags.TABLE.equals(peer.getTag()) || ElementTags.CELL.equals(peer.getTag())) { Properties p = peer.getAttributes(attrs); String value; if (ElementTags.TABLE.equals(peer.getTag()) && (value = p.getProperty(ElementTags.BORDERWIDTH)) != null) { if (Float.parseFloat(value + "f") > 0) { tableBorder = true; } } if (tableBorder) { p.put(ElementTags.LEFT, String.valueOf(true)); p.put(ElementTags.RIGHT, String.valueOf(true)); p.put(ElementTags.TOP, String.valueOf(true)); p.put(ElementTags.BOTTOM, String.valueOf(true)); } handleStartingTags(peer.getTag(), p); return; } handleStartingTags(peer.getTag(), peer.getAttributes(attrs)); return; } Properties attributes = new Properties(); if (attrs != null) { for (int i = 0; i < attrs.getLength(); i++) { String attribute = attrs.getQName(i).toLowerCase(); attributes.setProperty(attribute, attrs.getValue(i).toLowerCase()); } } handleStartingTags(name, attributes); } /** * This method gets called when an end tag is encountered. * * @param uri * the Uniform Resource Identifier * @param lname * the local name (without prefix), or the empty string if * Namespace processing is not being performed. * @param name * the name of the tag that ends */ public void endElement(String uri, String lname, String name) { // System.err.println("End: " + name); name = name.toLowerCase(); if (ElementTags.PARAGRAPH.equals(name)) { try { document.add((Element) stack.pop()); return; } catch (DocumentException e) { throw new ExceptionConverter(e); } } if (HtmlTagMap.isHead(name)) { // we do nothing return; } if (HtmlTagMap.isTitle(name)) { if (currentChunk != null) { bodyAttributes.put(ElementTags.TITLE, currentChunk.getContent()); } return; } if (HtmlTagMap.isMeta(name)) { // we do nothing return; } if (HtmlTagMap.isLink(name)) { // we do nothing return; } if (HtmlTagMap.isBody(name)) { // we do nothing return; } if (myTags.containsKey(name)) { XmlPeer peer = (XmlPeer) myTags.get(name); if (ElementTags.TABLE.equals(peer.getTag())) { tableBorder = false; } super.handleEndingTags(peer.getTag()); return; } // super.handleEndingTags is replaced with handleEndingTags // suggestion by Ken Auer handleEndingTags(name); } }