Package com.lowagie.tools.plugins

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

/*
* $Id: Handouts.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 javax.swing.JOptionPane;

import com.lowagie.text.Document;
import com.lowagie.text.PageSize;
import com.lowagie.text.Rectangle;
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.OptionArgument;
import com.lowagie.tools.arguments.StringArgument;
import com.lowagie.tools.arguments.filters.PdfFilter;

/**
* Generates a PDF file that is useable as Handout.
*/
public class Handouts extends AbstractTool {

  static {
    addVersion("$Id: Handouts.java 45 2007-05-15 22:02:53Z chammer $");
  }

  /**
   * Constructs a Handouts object.
   */
  public Handouts() {
    arguments.add(new FileArgument(this, "srcfile", "The file you want to convert", false, new PdfFilter()));
    arguments.add(new FileArgument(this, "destfile", "The file to which the Handout has to be written", true, new PdfFilter()));
    OptionArgument oa = new OptionArgument(this, "pages", "The number of pages you want on one handout page");
    oa.addOption("2 pages on 1", "2");
    oa.addOption("3 pages on 1", "3");
    oa.addOption("4 pages on 1", "4");
    oa.addOption("5 pages on 1", "5");
    oa.addOption("6 pages on 1", "6");
    oa.addOption("7 pages on 1", "7");
    oa.addOption("8 pages on 1", "8");
    arguments.add(oa);
  }

  /**
   * @see com.lowagie.tools.AbstractTool#createFrame()
   */
  protected void createFrame() {
    internalFrame = new JInternalFrame("Handouts", true, false, true);
    internalFrame.setSize(300, 80);
    internalFrame.setJMenuBar(getMenubar());
    System.out.println("=== Handouts 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("destfile") == null) throw new InstantiationException("You need to choose a destination file");
      File dest = (File)getValue("destfile");
      int pages;
      try {
        pages = Integer.parseInt((String) getValue("pages"));
      }
      catch(Exception e) {
        pages = 4;
      }

      float x1 = 30f;
      float x2 = 280f;
      float x3 = 320f;
      float x4 = 565f;

      float[] y1 = new float[pages];
      float[] y2 = new float[pages];

      float height = (778f - (20f * (pages - 1))) / pages;
      y1[0] = 812f;
      y2[0] = 812f - height;

      for (int i = 1; i < pages; i++) {
        y1[i] = y2[i - 1] - 20f;
        y2[i] = y1[i] - height;
      }

      // 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.");

      // step 1: creation of a document-object
      Document document = new Document(PageSize.A4);
      // step 2: we create a writer that listens to the document
      PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(dest));
      // step 3: we open the document
      document.open();
      PdfContentByte cb = writer.getDirectContent();
      PdfImportedPage page;
      int rotation;
      int i = 0;
      int p = 0;
      // step 4: we add content
      while (i < n) {
        i++;
        Rectangle rect = reader.getPageSizeWithRotation(i);
        float factorx = (x2 - x1) / rect.width();
        float factory = (y1[p] - y2[p]) / rect.height();
        float factor = (factorx < factory ? factorx : factory);
        float dx = (factorx == factor ? 0f : ((x2 - x1) - rect.width() * factor) / 2f);
        float dy = (factory == factor ? 0f : ((y1[p] - y2[p]) - rect.height() * factor) / 2f);
        page = writer.getImportedPage(reader, i);
        rotation = reader.getPageRotation(i);
        if (rotation == 90 || rotation == 270) {
          cb.addTemplate(page, 0, -factor, factor, 0, x1 + dx, y2[p] + dy + rect.height() * factor);
        }
        else {
          cb.addTemplate(page, factor, 0, 0, factor, x1 + dx, y2[p] + dy);
        }
        cb.setRGBColorStroke(0xC0, 0xC0, 0xC0);
        cb.rectangle(x3 - 5f, y2[p] - 5f, x4 - x3 + 10f, y1[p] - y2[p] + 10f);
        for (float l = y1[p] - 19; l > y2[p]; l -= 16) {
          cb.moveTo(x3, l);
          cb.lineTo(x4, l);
        }
        cb.rectangle(x1 + dx, y2[p] + dy, rect.width() * factor, rect.height() * factor);
        cb.stroke();
        System.out.println("Processed page " + i);
        p++;
        if (p == pages) {
          p = 0;
          document.newPage();
        }
      }
      // step 5: we close the document
      document.close();
    }
    catch(Exception e) {
          JOptionPane.showMessageDialog(internalFrame,
                e.getMessage(),
                e.getClass().getName(),
                JOptionPane.ERROR_MESSAGE);
            System.err.println(e.getMessage());
    }
  }

    /**
     *
     * @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
  }


    /**
     * Converts a PDF file to a PDF file useable as Handout.
     *
     * @param args String[]
     */
    public static void main(String[] args) {
      Handouts tool = new Handouts();
      if (args.length < 2) {
        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("destfile");
  }
}
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