pdfdocument.java

一个java操作pdf文件的开发包,很好用的.

/*
 * $Name:  $
 * $Id: PdfDocument.java,v 1.152 2002/11/19 08:33:36 blowagie Exp $
 *
 * Copyright 1999, 2000, 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.pdf;

import com.lowagie.text.StringCompare;
import com.lowagie.text.Anchor;
import com.lowagie.text.Annotation;
import com.lowagie.text.Cell;
import com.lowagie.text.DocListener;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Element;
import com.lowagie.text.Chunk;
import com.lowagie.text.Graphic;
import com.lowagie.text.HeaderFooter;
import com.lowagie.text.Image;
import com.lowagie.text.ImgWMF;
import com.lowagie.text.List;
import com.lowagie.text.ListItem;
import com.lowagie.text.Meta;
import com.lowagie.text.Header;
import com.lowagie.text.Phrase;
import com.lowagie.text.Paragraph;
import com.lowagie.text.Rectangle;
import com.lowagie.text.Section;
import com.lowagie.text.Table;
import com.lowagie.text.Watermark;
import com.lowagie.text.ExceptionConverter;

import java.awt.Color;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.TreeMap;
import java.util.Iterator;
import java.util.ListIterator;
import java.io.IOException;

/**
 * <CODE>PdfDocument</CODE> is the class that is used by <CODE>PdfWriter</CODE>
 * to translate a <CODE>Document</CODE> into a PDF with different pages.
 * <P>
 * A <CODE>PdfDocument</CODE> always listens to a <CODE>Document</CODE>
 * and adds the Pdf representation of every <CODE>Element</CODE> that is
 * added to the <CODE>Document</CODE>.
 *
 * @see		com.lowagie.text.Document
 * @see		com.lowagie.text.DocListener
 * @see		PdfWriter
 */

class PdfDocument extends Document implements DocListener {
    
    /**
     * <CODE>PdfInfo</CODE> is the PDF InfoDictionary.
     * <P>
     * A document's trailer may contain a reference to an Info dictionary that provides information
     * about the document. This optional dictionary may contain one or more keys, whose values
     * should be strings.<BR>
     * This object is described in the 'Portable Document Format Reference Manual version 1.3'
     * section 6.10 (page 120-121)
     */
    
    public class PdfInfo extends PdfDictionary {
        
        // constructors
        
        /**
         * Construct a <CODE>PdfInfo</CODE>-object.
         */
        
        PdfInfo() {
            super();
            addProducer();
            addCreationDate();
        }
        
        /**
         * Constructs a <CODE>PdfInfo</CODE>-object.
         *
         * @param		author		name of the author of the document
         * @param		title		title of the document
         * @param		subject		subject of the document
         */
        
        PdfInfo(String author, String title, String subject) {
            this();
            addTitle(title);
            addSubject(subject);
            addAuthor(author);
        }
        
        /**
         * Adds the title of the document.
         *
         * @param	title		the title of the document
         */
        
        void addTitle(String title) {
            put(PdfName.TITLE, new PdfString(title, PdfObject.TEXT_UNICODE));
        }
        
        /**
         * Adds the subject to the document.
         *
         * @param	subject		the subject of the document
         */
        
        void addSubject(String subject) {
            put(PdfName.SUBJECT, new PdfString(subject, PdfObject.TEXT_UNICODE));
        }
        
        /**
         * Adds some keywords to the document.
         *
         * @param	keywords		the keywords of the document
         */
        
        void addKeywords(String keywords) {
            put(PdfName.KEYWORDS, new PdfString(keywords, PdfObject.TEXT_UNICODE));
        }
        
        /**
         * Adds the name of the author to the document.
         *
         * @param	author		the name of the author
         */
        
        void addAuthor(String author) {
            put(PdfName.AUTHOR, new PdfString(author, PdfObject.TEXT_UNICODE));
        }
        
        /**
         * Adds the name of the creator to the document.
         *
         * @param	creator		the name of the creator
         */
        
        void addCreator(String creator) {
            put(PdfName.CREATOR, new PdfString(creator, PdfObject.TEXT_UNICODE));
        }
        
        /**
         * Adds the name of the producer to the document.
         */
        
        void addProducer() {
            // This line may only be changed by Bruno Lowagie or Paulo Soares
            put(PdfName.PRODUCER, new PdfString(getVersion()));
            // Do not edit the line above!
        }
        
        /**
         * Adds the date of creation to the document.
         */
        
        void addCreationDate() {
            put(PdfName.CREATIONDATE, new PdfDate());
        }
        
        void addkey(String key, String value) {
            if (key.equals("Producer") || key.equals("CreationDate"))
                return;
            put(new PdfName(key), new PdfString(value, PdfObject.TEXT_UNICODE));
        }
    }
    
    /**
     * <CODE>PdfCatalog</CODE> is the PDF Catalog-object.
     * <P>
     * The Catalog is a dictionary that is the root node of the document. It contains a reference
     * to the tree of pages contained in the document, a reference to the tree of objects representing
     * the document's outline, a reference to the document's article threads, and the list of named
     * destinations. In addition, the Catalog indicates whether the document's outline or thumbnail
     * page images should be displayed automatically when the document is viewed and wether some location
     * other than the first page should be shown when the document is opened.<BR>
     * In this class however, only the reference to the tree of pages is implemented.<BR>
     * This object is described in the 'Portable Document Format Reference Manual version 1.3'
     * section 6.2 (page 67-71)
     */
    
    class PdfCatalog extends PdfDictionary {
        
        // constructors
        
        /**
         * Constructs a <CODE>PdfCatalog</CODE>.
         *
         * @param		pages		an indirect reference to the root of the document's Pages tree.
         */
        
        PdfCatalog(PdfIndirectReference pages) {
            super(CATALOG);
            put(PdfName.PAGES, pages);
        }
        
        /**
         * Constructs a <CODE>PdfCatalog</CODE>.
         *
         * @param		pages		an indirect reference to the root of the document's Pages tree.
         * @param		outlines	an indirect reference to the outline tree.
         */
        
        PdfCatalog(PdfIndirectReference pages, PdfIndirectReference outlines) {
            super(CATALOG);
            put(PdfName.PAGES, pages);
            put(PdfName.PAGEMODE, PdfName.USEOUTLINES);
            put(PdfName.OUTLINES, outlines);
        }
        
        /**
         * Adds the names of the named destinations to the catalog.
         * @param localDestinations the local destinations
         */
        void addNames(TreeMap localDestinations, ArrayList documentJavaScript, PdfWriter writer) {
            if (localDestinations.size() == 0 && documentJavaScript.size() == 0)
                return;
            try {
                PdfDictionary names = new PdfDictionary();
                if (localDestinations.size() > 0) {
                    PdfArray ar = new PdfArray();
                    for (Iterator i = localDestinations.keySet().iterator(); i.hasNext();) {
                        String name = (String)i.next();
                        Object obj[] = (Object[])localDestinations.get(name);
                        PdfIndirectReference ref = (PdfIndirectReference)obj[1];
                        ar.add(new PdfString(name));
                        ar.add(ref);
                    }
                    PdfDictionary dests = new PdfDictionary();
                    dests.put(PdfName.NAMES, ar);
                    names.put(PdfName.DESTS, writer.addToBody(dests).getIndirectReference());
                }
                if (documentJavaScript.size() > 0) {
                    String s[] = new String[documentJavaScript.size()];
                    for (int k = 0; k < s.length; ++k)
                        s[k] = Integer.toHexString(k);
                    Arrays.sort(s, new StringCompare());
                    PdfArray ar = new PdfArray();
                    for (int k = 0; k < s.length; ++k) {
                        ar.add(new PdfString(s[k]));
                        ar.add((PdfIndirectReference)documentJavaScript.get(k));
                    }
                    PdfDictionary js = new PdfDictionary();
                    js.put(PdfName.NAMES, ar);
                    names.put(PdfName.JAVASCRIPT, writer.addToBody(js).getIndirectReference());
                }
                put(PdfName.NAMES, writer.addToBody(names).getIndirectReference());
            }
            catch (IOException e) {
                throw new ExceptionConverter(e);
            }
        }
        
        /** Sets the viewer preferences as the sum of several constants.
         * @param preferences the viewer preferences
         * @see PdfWriter#setViewerPreferences
         */
        
        void setViewerPreferences(int preferences) {
            if ((preferences & PdfWriter.PageLayoutSinglePage) != 0)
                put(PdfName.PAGELAYOUT, PdfName.SINGLEPAGE);
            else if ((preferences & PdfWriter.PageLayoutOneColumn) != 0)
                put(PdfName.PAGELAYOUT, PdfName.ONECOLUMN);
            else if ((preferences & PdfWriter.PageLayoutTwoColumnLeft) != 0)
                put(PdfName.PAGELAYOUT, PdfName.TWOCOLUMNLEFT);
            else if ((preferences & PdfWriter.PageLayoutTwoColumnRight) != 0)
                put(PdfName.PAGELAYOUT, PdfName.TWOCOLUMNRIGHT);
            if ((preferences & PdfWriter.PageModeUseNone) != 0)
                put(PdfName.PAGEMODE, PdfName.USENONE);
            else if ((preferences & PdfWriter.PageModeUseOutlines) != 0)
                put(PdfName.PAGEMODE, PdfName.USEOUTLINES);