/*
 * $Id$
 * Copyright (c) 2005-2007 Bruno Lowagie
 *
 * 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.
 * 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.toolbox.plugins;

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

import javax.swing.JInternalFrame;

import com.lowagie.text.pdf.PRIndirectReference;
import com.lowagie.text.pdf.PdfDictionary;
import com.lowagie.text.pdf.PdfName;
import com.lowagie.text.pdf.PdfObject;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfStamper;
import com.lowagie.text.pdf.PdfString;
import com.lowagie.toolbox.AbstractTool;
import com.lowagie.toolbox.arguments.AbstractArgument;
import com.lowagie.toolbox.arguments.FileArgument;
import com.lowagie.toolbox.arguments.filters.PdfFilter;

/**
 * This tool copies an existing PDF and removes potentially dangerous code that launches an application.
 * @since 2.1.1 (imported from itexttoolbox project)
 */
public class RemoveLaunchApplication
    extends AbstractTool {

  static {
    addVersion(
        "$Id$");
  }

  /**
   * Constructs a ReversePages object.
   */
  public RemoveLaunchApplication() {
    menuoptions = MENU_EXECUTE | MENU_EXECUTE_SHOW;
    arguments.add(new FileArgument(this, "srcfile",
                                   "The file from which you want to remove Launch Application actions", false,
                                   new PdfFilter()));
    arguments.add(new FileArgument(this, "destfile",
                                   "The file to which the cleaned up version of the original PDF has to be written", true,
                                   new PdfFilter()));
  }

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

  /**
   * @see com.lowagie.toolbox.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");

      // we create a reader for a certain document
      PdfReader reader = new PdfReader(src.getAbsolutePath());
      PdfObject o;
      PdfDictionary d;
      PdfDictionary l;
      PdfName n;
      for (int i = 1; i < reader.getXrefSize(); i++) {
      	o = reader.getPdfObject(i);
      	if (o instanceof PdfDictionary) {
      		d = (PdfDictionary)o;
      		o = d.get(PdfName.A);
      		if (o == null) continue;
      		if (o instanceof PdfDictionary) {
      			l = (PdfDictionary)o;
      		}
      		else {
      			PRIndirectReference r =(PRIndirectReference)o;
      			l = (PdfDictionary)reader.getPdfObject(r.getNumber());
      		}
      		n = (PdfName)l.get(PdfName.S);
      		if (PdfName.LAUNCH.equals(n)) {
      			if (l.get(PdfName.F) != null) {
      				System.out.println("Removed: " + l.get(PdfName.F));
      				l.remove(PdfName.F);
      			}
      			if (l.get(PdfName.WIN) != null) {
      				System.out.println("Removed: " + l.get(PdfName.WIN));
      				l.remove(PdfName.WIN);
      			}
      			l.put(PdfName.S, PdfName.JAVASCRIPT);
      			l.put(PdfName.JS, new PdfString("app.alert('Launch Application Action removed by iText');\r"));
      		}
      	}
      }
      PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
      stamper.close();
    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }

    /**
     *
     * @see com.lowagie.toolbox.AbstractTool#valueHasChanged(com.lowagie.toolbox.arguments.AbstractArgument)
     * @param arg StringArgument
     */
    public void valueHasChanged(AbstractArgument arg) {
    if (internalFrame == null) {
      // if the internal frame is null, the tool was called from the command line
      return;
    }
    // represent the changes of the argument in the internal frame
  }

    /**
     * Copy an existing PDF and replace the Launch Application Action with JavaScript alerts.
     *
     * @param args String[]
     */
    public static void main(String[] args) {
    RemoveLaunchApplication tool = new RemoveLaunchApplication();
    if (args.length < 2) {
      System.err.println(tool.getUsage());
    }
    tool.setMainArguments(args);
    tool.execute();
  }

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