simplebookmark.java

iText是一个能够快速产生PDF文件的java类库。iText的java类对于那些要产生包含文本

/*
 * Copyright 2003 by 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.
 *
 * 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 java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Stack;
import java.util.StringTokenizer;

import com.lowagie.text.xml.simpleparser.IanaEncodings;
import com.lowagie.text.xml.simpleparser.SimpleXMLDocHandler;
import com.lowagie.text.xml.simpleparser.SimpleXMLParser;
/**
 * Bookmark processing in a simple way. It has some limitations, mainly the only
 * action types supported are GoTo, GoToR, URI and Launch.
 * <p>
 * The list structure is composed by a number of HashMap, keyed by strings, one HashMap
 * for each bookmark.
 * The element values are all strings with the exception of the key "Kids" that has
 * another list for the child bookmarks.
 * <p>
 * All the bookmarks have a "Title" with the
 * bookmark title and optionally a "Style" that can be "bold", "italic" or a
 * combination of both. They can also have a "Color" key with a value of three
 * floats separated by spaces. The key "Open" can have the values "true" or "false" and
 * signals the open status of the children. It's "true" by default.
 * <p>
 * The actions and the parameters can be:
 * <ul>
 * <li>"Action" = "GoTo" - "Page" | "Named"
 * <ul>
 * <li>"Page" = "3 XYZ 70 400 null" - page number followed by a destination (/XYZ is also accepted)
 * <li>"Named" = "named_destination"
 * </ul>
 * <li>"Action" = "GoToR" - "Page" | "Named" | "NamedN", "File", ["NewWindow"]
 * <ul>
 * <li>"Page" = "3 XYZ 70 400 null" - page number followed by a destination (/XYZ is also accepted)
 * <li>"Named" = "named_destination_as_a_string"
 * <li>"NamedN" = "named_destination_as_a_name"
 * <li>"File" - "the_file_to_open"
 * <li>"NewWindow" - "true" or "false"
 * </ul>
 * <li>"Action" = "URI" - "URI"
 * <ul>
 * <li>"URI" = "http://sf.net" - URI to jump to
 * </ul>
 * <li>"Action" = "Launch" - "File"
 * <ul>
 * <li>"File" - "the_file_to_open_or_execute"
 * </ul>
 * @author Paulo Soares ([e-mail])
 */
public class SimpleBookmark implements SimpleXMLDocHandler {
    
    private ArrayList topList;
    private Stack attr = new Stack();
    
    /** Creates a new instance of SimpleBookmark */
    private SimpleBookmark() {
    }
    
    private static List bookmarkDepth(PdfReader reader, PdfDictionary outline, IntHashtable pages) {
        ArrayList list = new ArrayList();
        while (outline != null) {
            HashMap map = new HashMap();
            PdfString title = (PdfString)PdfReader.getPdfObjectRelease(outline.get(PdfName.TITLE));
            map.put("Title", title.toUnicodeString());
            PdfArray color = (PdfArray)PdfReader.getPdfObjectRelease(outline.get(PdfName.C));
            if (color != null && color.getArrayList().size() == 3) {
                ByteBuffer out = new ByteBuffer();
                ArrayList arr = color.getArrayList();
                out.append(((PdfNumber)arr.get(0)).floatValue()).append(' ');
                out.append(((PdfNumber)arr.get(1)).floatValue()).append(' ');
                out.append(((PdfNumber)arr.get(2)).floatValue());
                map.put("Color", PdfEncodings.convertToString(out.toByteArray(), null));
            }
            PdfNumber style = (PdfNumber)PdfReader.getPdfObjectRelease(outline.get(PdfName.F));
            if (style != null) {
                int f = style.intValue();
                String s = "";
                if ((f & 1) != 0)
                    s += "italic ";
                if ((f & 2) != 0)
                    s += "bold ";
                s = s.trim();
                if (s.length() != 0) 
                    map.put("Style", s);
            }
            PdfNumber count = (PdfNumber)PdfReader.getPdfObjectRelease(outline.get(PdfName.COUNT));
            if (count != null && count.intValue() < 0)
                map.put("Open", "false");
            try {
                PdfObject dest = PdfReader.getPdfObjectRelease(outline.get(PdfName.DEST));
                if (dest != null) {
                    mapGotoBookmark(map, dest, pages); //changed by ujihara 2004-06-13
                }
                else {
                    PdfDictionary action = (PdfDictionary)PdfReader.getPdfObjectRelease(outline.get(PdfName.A));
                    if (action != null) {
                        if (PdfName.GOTO.equals(PdfReader.getPdfObjectRelease(action.get(PdfName.S)))) {
                            dest = PdfReader.getPdfObjectRelease(action.get(PdfName.D));
                            if (dest != null) {
                                mapGotoBookmark(map, dest, pages);
                            }
                        }
                        else if (PdfName.URI.equals(PdfReader.getPdfObjectRelease(action.get(PdfName.S)))) {
                            map.put("Action", "URI");
                            map.put("URI", ((PdfString)PdfReader.getPdfObjectRelease(action.get(PdfName.URI))).toUnicodeString());
                        }
                        else if (PdfName.GOTOR.equals(PdfReader.getPdfObjectRelease(action.get(PdfName.S)))) {
                            dest = PdfReader.getPdfObjectRelease(action.get(PdfName.D));
                            if (dest != null) {
                                if (dest.isString())
                                    map.put("Named", dest.toString());
                                else if (dest.isName())
                                    map.put("NamedN", PdfName.decodeName(dest.toString()));
                                else if (dest.isArray()) {
                                    ArrayList arr = ((PdfArray)dest).getArrayList();
                                    StringBuffer s = new StringBuffer();
                                    s.append(arr.get(0).toString());
                                    s.append(' ').append(arr.get(1).toString());
                                    for (int k = 2; k < arr.size(); ++k)
                                        s.append(' ').append(arr.get(k).toString());
                                    map.put("Page", s.toString());
                                }
                            }
                            map.put("Action", "GoToR");
                            PdfObject file = PdfReader.getPdfObjectRelease(action.get(PdfName.F));
                            if (file != null) {
                                if (file.isString())
                                    map.put("File", ((PdfString)file).toUnicodeString());
                                else if (file.isDictionary()) {
                                    file = PdfReader.getPdfObject(((PdfDictionary)file).get(PdfName.F));
                                    if (file.isString())
                                        map.put("File", ((PdfString)file).toUnicodeString());
                                }
                            }
                            PdfObject newWindow = PdfReader.getPdfObjectRelease(action.get(PdfName.NEWWINDOW));
                            if (newWindow != null)
                                map.put("NewWindow", newWindow.toString());
                        }
                        else if (PdfName.LAUNCH.equals(PdfReader.getPdfObjectRelease(action.get(PdfName.S)))) {
                            map.put("Action", "Launch");
                            PdfObject file = PdfReader.getPdfObjectRelease(action.get(PdfName.F));
                            if (file == null)
                                file = PdfReader.getPdfObjectRelease(action.get(PdfName.WIN));
                            if (file != null) {
                                if (file.isString())
                                    map.put("File", ((PdfString)file).toUnicodeString());
                                else if (file.isDictionary()) {
                                    file = PdfReader.getPdfObjectRelease(((PdfDictionary)file).get(PdfName.F));
                                    if (file.isString())
                                        map.put("File", ((PdfString)file).toUnicodeString());
                                }
                            }
                        }
                    }
                }
            }
            catch (Exception e) {
                //empty on purpose
            }
            PdfDictionary first = (PdfDictionary)PdfReader.getPdfObjectRelease(outline.get(PdfName.FIRST));
            if (first != null) {
                map.put("Kids", bookmarkDepth(reader, first, pages));
            }
            list.add(map);
            outline = (PdfDictionary)PdfReader.getPdfObjectRelease(outline.get(PdfName.NEXT));
        }
        return list;
    }
    
	private static void mapGotoBookmark(HashMap map, PdfObject dest, IntHashtable pages) 
	{
		if (dest.isString())
			map.put("Named", dest.toString());
		else if (dest.isName())
			map.put("Named", PdfName.decodeName(dest.toString()));
		else if (dest.isArray()) 
			map.put("Page", makeBookmarkParam((PdfArray)dest, pages)); //changed by ujihara 2004-06-13
		map.put("Action", "GoTo");
	}

	private static String makeBookmarkParam(PdfArray dest, IntHashtable pages)
	{
		ArrayList arr = dest.getArrayList();
		StringBuffer s = new StringBuffer();
		s.append(pages.get(getNumber((PdfIndirectReference)arr.get(0)))); //changed by ujihara 2004-06-13
		s.append(' ').append(arr.get(1).toString().substring(1));
		for (int k = 2; k < arr.size(); ++k)
			s.append(' ').append(arr.get(k).toString());
		return s.toString();
	}
	
	/**
	 * Gets number of indirect. If type of directed indirect is PAGES, it refers PAGE object through KIDS.