Package com.lowagie.tools.plugins

Source Code of com.lowagie.tools.plugins.Split

/*
* $Id: Split.java 45 2007-05-15 22:02:53Z chammer $
* Copyright (c) 2005-2007 Bruno Lowagie, Carsten Hammer
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/

/*
* This class was originally published under the MPL by Bruno Lowagie
* and Carsten Hammer.
* It was a part of iText, a Java-PDF library. You can now use it under
* the MIT License; for backward compatibility you can also use it under
* the MPL version 1.1: http://www.mozilla.org/MPL/
* A copy of the MPL license is bundled with the source code FYI.
*/

package com.lowagie.tools.plugins;

import java.io.File;
import java.io.FileOutputStream;

import javax.swing.JInternalFrame;

import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.tools.AbstractTool;
import com.lowagie.tools.arguments.FileArgument;
import com.lowagie.tools.arguments.StringArgument;
import com.lowagie.tools.arguments.filters.PdfFilter;
import com.lowagie.tools.swing.PdfInformationPanel;

/**
* This tool lets you split a PDF in two separate PDF files.
*/
public class Split extends AbstractTool {

  static {
    addVersion("$Id: Split.java 45 2007-05-15 22:02:53Z chammer $");
  }
  /**
   * Constructs an Split object.
   */
  public Split() {
    FileArgument f = new FileArgument(this, "srcfile", "The file you want to split", false, new PdfFilter());
    f.setLabel(new PdfInformationPanel());
    arguments.add(f);
    arguments.add(new FileArgument(this, "destfile1", "The file to which the first part of the original PDF has to be written", true, new PdfFilter()));
    arguments.add(new FileArgument(this, "destfile2", "The file to which the second part of the original PDF has to be written", true, new PdfFilter()));
    arguments.add(new StringArgument(this, "pagenumber", "The pagenumber where you want to split", String.class.getName()));
  }

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

  /**
   * @see com.lowagie.tools.AbstractTool#execute()
   */
  public void execute() {
        try {
      if (getValue("srcfile") == null) throw new InstantiationException("You need to choose a sourcefile");
      File src = (File)getValue("srcfile");
          if (getValue("destfile1") == null) throw new InstantiationException("You need to choose a destination file for the first part of the PDF");
          File file1 = (File)getValue("destfile1");
          if (getValue("destfile2") == null) throw new InstantiationException("You need to choose a destination file for the second part of the PDF");
          File file2 = (File)getValue("destfile2");
          int pagenumber = Integer.parseInt((String)getValue("pagenumber"));

          // we create a reader for a certain document
      PdfReader reader = new PdfReader(src.getAbsolutePath());
      // we retrieve the total number of pages
      int n = reader.getNumberOfPages();
      System.out.println("There are " + n + " pages in the original file.");

      if (pagenumber < 2 || pagenumber > n) {
        throw new DocumentException("You can't split this document at page " + pagenumber + "; there is no such page.");
      }

      // step 1: creation of a document-object
      Document document1 = new Document(reader.getPageSizeWithRotation(1));
      Document document2 = new Document(reader.getPageSizeWithRotation(pagenumber));
      // step 2: we create a writer that listens to the document
      PdfWriter writer1 = PdfWriter.getInstance(document1, new FileOutputStream(file1));
      PdfWriter writer2 = PdfWriter.getInstance(document2, new FileOutputStream(file2));
      // step 3: we open the document
      document1.open();
      PdfContentByte cb1 = writer1.getDirectContent();
      document2.open();
      PdfContentByte cb2 = writer2.getDirectContent();
      PdfImportedPage page;
      int rotation;
      int i = 0;
      // step 4: we add content
      while (i < pagenumber - 1) {
        i++;
        document1.setPageSize(reader.getPageSizeWithRotation(i));
        document1.newPage();
        page = writer1.getImportedPage(reader, i);
        rotation = reader.getPageRotation(i);
        if (rotation == 90 || rotation == 270) {
          cb1.addTemplate(page, 0, -1f, 1f, 0, 0, reader.getPageSizeWithRotation(i).height());
        }
        else {
          cb1.addTemplate(page, 1f, 0, 0, 1f, 0, 0);
        }
      }
      while (i < n) {
        i++;
        document2.setPageSize(reader.getPageSizeWithRotation(i));
        document2.newPage();
        page = writer2.getImportedPage(reader, i);
        rotation = reader.getPageRotation(i);
        if (rotation == 90 || rotation == 270) {
          cb2.addTemplate(page, 0, -1f, 1f, 0, 0, reader.getPageSizeWithRotation(i).height());
        }
        else {
          cb2.addTemplate(page, 1f, 0, 0, 1f, 0, 0);
        }
      }
      // step 5: we close the document
      document1.close();
      document2.close();
        }
        catch(Exception e) {
            e.printStackTrace();
        }
    }

    /**
     *
     * @see com.lowagie.tools.AbstractTool#valueHasChanged(com.lowagie.tools.arguments.StringArgument)
     * @param arg StringArgument
     */
    public void valueHasChanged(StringArgument 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
  }


    /**
     * Split a PDF in two separate PDF files.
     *
     * @param args String[]
     */
    public static void main(String[] args) {
      Split tool = new Split();
      if (args.length < 4) {
        System.err.println(tool.getUsage());
      }
      tool.setMainArguments(args);
        tool.execute();
  }

    /**
     *
     * @see com.lowagie.tools.AbstractTool#getDestPathPDF()
     * @throws InstantiationException
     * @return File
     */
    protected File getDestPathPDF() throws InstantiationException {
    return (File)getValue("destfile1");
  }
}
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