htmlworker.java

源码包含生成 PDF 和 HTML 的类库

/*
 * Copyright 2004 Paulo Soares
 *
 * 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.
 *
 * Contributions by:
 * Lubos Strapko
 * 
 * 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.simpleparser;

import java.io.File;
import java.io.IOException;
import java.io.Reader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Stack;
import java.util.StringTokenizer;

import com.lowagie.text.html.HtmlTags;
import com.lowagie.text.html.Markup;
import com.lowagie.text.Chunk;
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.FontFactoryImp;
import com.lowagie.text.HeaderFooter;
import com.lowagie.text.Image;
import com.lowagie.text.ListItem;
import com.lowagie.text.Paragraph;
import com.lowagie.text.Phrase;
import com.lowagie.text.Rectangle;
import com.lowagie.text.TextElementArray;
import com.lowagie.text.pdf.PdfPTable;
import com.lowagie.text.xml.simpleparser.SimpleXMLDocHandler;
import com.lowagie.text.xml.simpleparser.SimpleXMLParser;

public class HTMLWorker implements SimpleXMLDocHandler, DocListener {

	protected ArrayList objectList;

	protected DocListener document;

	private Paragraph currentParagraph;

	private ChainedProperties cprops = new ChainedProperties();

	private Stack stack = new Stack();

	private boolean pendingTR = false;

	private boolean pendingTD = false;

	private boolean pendingLI = false;

	private StyleSheet style = new StyleSheet();

	private boolean isPRE = false;

	private Stack tableState = new Stack();

	private boolean skipText = false;

	private HashMap interfaceProps;

	private FactoryProperties factoryProperties = new FactoryProperties();

	/** Creates a new instance of HTMLWorker
	 * @param document A class that implements <CODE>DocListener</CODE>
	 * */
	public HTMLWorker(DocListener document) {
		this.document = document;
	}

	public void setStyleSheet(StyleSheet style) {
		this.style = style;
	}

	public StyleSheet getStyleSheet() {
		return style;
	}

	public void setInterfaceProps(HashMap interfaceProps) {
		this.interfaceProps = interfaceProps;
		FontFactoryImp ff = null;
		if (interfaceProps != null)
			ff = (FontFactoryImp) interfaceProps.get("font_factory");
		if (ff != null)
			factoryProperties.setFontImp(ff);
	}

	public HashMap getInterfaceProps() {
		return interfaceProps;
	}

	public void parse(Reader reader) throws IOException {
		SimpleXMLParser.parse(this, null, reader, true);
	}

	public static ArrayList parseToList(Reader reader, StyleSheet style)
			throws IOException {
		return parseToList(reader, style, null);
	}

	public static ArrayList parseToList(Reader reader, StyleSheet style,
			HashMap interfaceProps) throws IOException {
		HTMLWorker worker = new HTMLWorker(null);
		if (style != null)
			worker.style = style;
		worker.document = worker;
		worker.setInterfaceProps(interfaceProps);
		worker.objectList = new ArrayList();
		worker.parse(reader);
		return worker.objectList;
	}

	public void endDocument() {
		try {
			for (int k = 0; k < stack.size(); ++k)
				document.add((Element) stack.elementAt(k));
			if (currentParagraph != null)
				document.add(currentParagraph);
			currentParagraph = null;
		} catch (Exception e) {
			throw new ExceptionConverter(e);
		}
	}

	public void startDocument() {
		HashMap h = new HashMap();
		style.applyStyle("body", h);
		cprops.addToChain("body", h);
	}

	public void startElement(String tag, HashMap h) {
		if (!tagsSupported.containsKey(tag))
			return;
		try {
			style.applyStyle(tag, h);
			String follow = (String) FactoryProperties.followTags.get(tag);
			if (follow != null) {
				HashMap prop = new HashMap();
				prop.put(follow, null);
				cprops.addToChain(follow, prop);
				return;
			}
			FactoryProperties.insertStyle(h, cprops);
			if (tag.equals(HtmlTags.ANCHOR)) {
				cprops.addToChain(tag, h);
				if (currentParagraph == null) {
					currentParagraph = new Paragraph();
				}
				stack.push(currentParagraph);
				currentParagraph = new Paragraph();
				return;
			}
			if (tag.equals(HtmlTags.NEWLINE)) {
				if (currentParagraph == null) {
					currentParagraph = new Paragraph();
				}
				currentParagraph.add(factoryProperties
						.createChunk("\n", cprops));
				return;
			}
			if (tag.equals(HtmlTags.CHUNK) || tag.equals(HtmlTags.SPAN)) {
				cprops.addToChain(tag, h);
				return;
			}
			if (tag.equals(HtmlTags.IMAGE)) {
				String src = (String) h.get(ElementTags.SRC);
				if (src == null)
					return;
				cprops.addToChain(tag, h);
				Image img = null;
				if (interfaceProps != null) {
					ImageProvider ip = (ImageProvider) interfaceProps
							.get("img_provider");
					if (ip != null)
						img = ip.getImage(src, h, cprops, document);
					if (img == null) {
						HashMap images = (HashMap) interfaceProps
								.get("img_static");
						if (images != null) {
							Image tim = (Image) images.get(src);
							if (tim != null)
								img = Image.getInstance(tim);
						} else {
							if (!src.startsWith("http")) { // relative src references only
								String baseurl = (String) interfaceProps
										.get("img_baseurl");
								if (baseurl != null) {
									src = baseurl + src;
									img = Image.getInstance(src);
								}
							}
						}
					}
				}
				if (img == null) {
					if (!src.startsWith("http")) {
						String path = cprops.getProperty("image_path");
						if (path == null)
							path = "";
						src = new File(path, src).getPath();
					}
					img = Image.getInstance(src);
				}
				String align = (String) h.get("align");
				String width = (String) h.get("width");
				String height = (String) h.get("height");
				String before = cprops.getProperty("before");
				String after = cprops.getProperty("after");
				if (before != null)
					img.setSpacingBefore(Float.parseFloat(before));
				if (after != null)
					img.setSpacingAfter(Float.parseFloat(after));
				float actualFontSize = Markup.parseLength(cprops
						.getProperty(ElementTags.SIZE),
						Markup.DEFAULT_FONT_SIZE);
				if (actualFontSize <= 0f)
					actualFontSize = Markup.DEFAULT_FONT_SIZE;
				float widthInPoints = Markup.parseLength(width, actualFontSize);
				float heightInPoints = Markup.parseLength(height,
						actualFontSize);
				if (widthInPoints > 0 && heightInPoints > 0) {
					img.scaleAbsolute(widthInPoints, heightInPoints);
				} else if (widthInPoints > 0) {
					heightInPoints = img.getHeight() * widthInPoints
							/ img.getWidth();
					img.scaleAbsolute(widthInPoints, heightInPoints);
				} else if (heightInPoints > 0) {
					widthInPoints = img.getWidth() * heightInPoints
							/ img.getHeight();
					img.scaleAbsolute(widthInPoints, heightInPoints);
				}
				img.setWidthPercentage(0);
				if (align != null) {
					endElement("p");
					int ralign = Image.MIDDLE;
					if (align.equalsIgnoreCase("left"))
						ralign = Image.LEFT;
					else if (align.equalsIgnoreCase("right"))
						ralign = Image.RIGHT;
					img.setAlignment(ralign);
					Img i = null;
					boolean skip = false;
					if (interfaceProps != null) {
						i = (Img) interfaceProps.get("img_interface");
						if (i != null)
							skip = i.process(img, h, cprops, document);
					}
					if (!skip)
						document.add(img);
					cprops.removeChain(tag);
				} else {
					cprops.removeChain(tag);
					if (currentParagraph == null) {
						currentParagraph = FactoryProperties
								.createParagraph(cprops);
					}
					currentParagraph.add(new Chunk(img, 0, 0));
				}
				return;
			}
			endElement("p");
			if (tag.equals("h1") || tag.equals("h2") || tag.equals("h3")
					|| tag.equals("h4") || tag.equals("h5") || tag.equals("h6")) {
				if (!h.containsKey(ElementTags.SIZE)) {
					int v = 7 - Integer.parseInt(tag.substring(1));
					h.put(ElementTags.SIZE, Integer.toString(v));
				}
				cprops.addToChain(tag, h);
				return;
			}
			if (tag.equals(HtmlTags.UNORDEREDLIST)) {
				if (pendingLI)
					endElement(HtmlTags.LISTITEM);
				skipText = true;
				cprops.addToChain(tag, h);
				com.lowagie.text.List list = new com.lowagie.text.List(false,
						10);
				list.setListSymbol("\u2022");
				stack.push(list);
				return;
			}
			if (tag.equals(HtmlTags.ORDEREDLIST)) {
				if (pendingLI)
					endElement(HtmlTags.LISTITEM);
				skipText = true;
				cprops.addToChain(tag, h);
				com.lowagie.text.List list = new com.lowagie.text.List(true, 10);
				stack.push(list);
				return;
			}
			if (tag.equals(HtmlTags.LISTITEM)) {
				if (pendingLI)
					endElement(HtmlTags.LISTITEM);
				skipText = false;
				pendingLI = true;
				cprops.addToChain(tag, h);
				ListItem item = FactoryProperties.createListItem(cprops);
				stack.push(item);
				return;
			}
			if (tag.equals(HtmlTags.DIV) || tag.equals(HtmlTags.BODY)) {
				cprops.addToChain(tag, h);
				return;
			}
			if (tag.equals(HtmlTags.PRE)) {