/*
 * $Id: Concat.java,v 1.7 2005/11/29 21:05:02 blowagie Exp $
 * $Name:  $
 *
 * Copyright 2005 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.tools.plugins;

import java.io.File;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;

import javax.swing.JInternalFrame;

import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfCopy;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.SimpleBookmark;
import com.lowagie.tools.arguments.FileArgument;
import com.lowagie.tools.arguments.PdfFilter;
import com.lowagie.tools.arguments.ToolArgument;

/**
 * Concatenates two PDF files
 */
public class Concat extends AbstractTool {

	static {
		addVersion("$Id: Concat.java,v 1.7 2005/11/29 21:05:02 blowagie Exp $");
	}
	/**
	 * Constructs a Concat object.
	 */
	public Concat() {
		menuoptions = MENU_EXECUTE | MENU_EXECUTE_SHOW;
		arguments.add(new FileArgument(this, "srcfile1", "The first PDF file", false, new PdfFilter()));
		arguments.add(new FileArgument(this, "srcfile2", "The second PDF file", false, new PdfFilter()));
		arguments.add(new FileArgument(this, "destfile", "The file to which the concatenated PDF has to be written", true, new PdfFilter()));
	}

	/**
	 * @see com.lowagie.tools.plugins.AbstractTool#createFrame()
	 */
	protected void createFrame() {
		internalFrame = new JInternalFrame("Concatenate 2 PDF files", true, false, true);
		internalFrame.setSize(300, 80);
		internalFrame.setJMenuBar(getMenubar());
		System.out.println("=== Concat OPENED ===");
	}

	/**
	 * @see com.lowagie.tools.plugins.AbstractTool#execute()
	 */
	public void execute() {
		try {
			String[] files = new String[2];
			if (getValue("srcfile1") == null) throw new InstantiationException("You need to choose a first sourcefile");
			files[0] = ((File)getValue("srcfile1")).getAbsolutePath();
			if (getValue("srcfile2") == null) throw new InstantiationException("You need to choose a second sourcefile");
			files[1] = ((File)getValue("srcfile2")).getAbsolutePath();
			if (getValue("destfile") == null) throw new InstantiationException("You need to choose a destination file");
			File pdf_file = (File)getValue("destfile");
            int pageOffset = 0;
            ArrayList master = new ArrayList();
            Document document = null;
            PdfCopy  writer = null;
            for (int i = 0; i < 2; i++) {
            	// we create a reader for a certain document
                PdfReader reader = new PdfReader(files[i]);
                reader.consolidateNamedDestinations();
                // we retrieve the total number of pages
                int n = reader.getNumberOfPages();
                List bookmarks = SimpleBookmark.getBookmark(reader);
                if (bookmarks != null) {
                    if (pageOffset != 0)
                        SimpleBookmark.shiftPageNumbers(bookmarks, pageOffset, null);
                    master.addAll(bookmarks);
                }
                pageOffset += n;
                System.out.println("There are " + n + " pages in " + files[i]);
                if (i == 0) {
                    // step 1: creation of a document-object
                    document = new Document(reader.getPageSizeWithRotation(1));
                    // step 2: we create a writer that listens to the document
                    writer = new PdfCopy(document, new FileOutputStream(pdf_file));
                    // step 3: we open the document
                    document.open();
                }
                // step 4: we add content
                PdfImportedPage page;
                for (int p = 0; p < n; ) {
                    ++p;
                    page = writer.getImportedPage(reader, p);
                    writer.addPage(page);
                    System.out.println("Processed page " + p);
                }
            }
            if (master.size() > 0)
                writer.setOutlines(master);
            // step 5: we close the document
            document.close();
		}
		catch(Exception e) {
            e.printStackTrace();
        }
    }

	/**
	 * @see com.lowagie.tools.plugins.AbstractTool#valueHasChanged(com.lowagie.tools.arguments.ToolArgument)
	 */
	public void valueHasChanged(ToolArgument arg) {
		if (internalFrame == null) {
			// if the internal frame is null, the tool was called from the commandline
			return;
		}
		// represent the changes of the argument in the internal frame
	}


    /**
     * Concatenates two PDF files.
     * @param args
     */
	public static void main(String[] args) {
    	Concat tool = new Concat();
    	if (args.length < 2) {
    		System.err.println(tool.getUsage());
    	}
    	tool.setArguments(args);
        tool.execute();
	}

	/**
	 * @see com.lowagie.tools.plugins.AbstractTool#getDestPathPDF()
	 */
	protected File getDestPathPDF() throws InstantiationException {
		return (File)getValue("destfile");
	}

}