/*
 * $Id$
 * 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.toolbox.plugins;

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

import javax.swing.JInternalFrame;

import com.lowagie.text.Document;
import com.lowagie.text.pdf.PRAcroForm;
import com.lowagie.text.pdf.PdfCopy;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.toolbox.AbstractTool;
import com.lowagie.toolbox.arguments.AbstractArgument;
import com.lowagie.toolbox.arguments.FileArgument;
import com.lowagie.toolbox.arguments.StringArgument;
import com.lowagie.toolbox.arguments.filters.PdfFilter;

/**
 * This tool lets you select pages from an existing PDF and copy them into a new PDF.
 * @since 2.1.1 (imported from itexttoolbox project)
 */
public class SelectedPages extends AbstractTool {

	static {
		addVersion("$Id$");
	}
	/**
	 * Constructs a SelectedPages object.
	 */
	public SelectedPages() {
		menuoptions = MENU_EXECUTE | MENU_EXECUTE_SHOW;
		arguments.add(new FileArgument(this, "srcfile", "The file you want to split", false, new PdfFilter()));
		arguments.add(new FileArgument(this, "destfile", "The file to which the first part of the original PDF has to be written", true, new PdfFilter()));
		arguments.add(new StringArgument(this, "selection", "A selection of pages (see Help for more info)"));
	}

	/**
	 * @see com.lowagie.toolbox.AbstractTool#createFrame()
	 */
	protected void createFrame() {
		internalFrame = new JInternalFrame("SelectedPages", true, false, true);
		internalFrame.setSize(300, 80);
		internalFrame.setJMenuBar(getMenubar());
		System.out.println("=== SelectedPages 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 for the first part of the PDF");
        	File dest = (File)getValue("destfile");
        	String selection = (String)getValue("selection");

        	// we create a reader for a certain document
			PdfReader reader = new PdfReader(src.getAbsolutePath());
			System.out.println("The original file had " + reader.getNumberOfPages() + " pages.");
			reader.selectPages(selection);
			int pages = reader.getNumberOfPages();
			System.err.println("The new file has " + pages + " pages.");
			Document document = new Document(reader.getPageSizeWithRotation(1));
			PdfCopy copy = new PdfCopy(document, new FileOutputStream(dest.getAbsolutePath()));
			document.open();
            PdfImportedPage page;
            for (int i = 0; i < pages; ) {
                ++i;
                System.out.println("Processed page " + i);
                page = copy.getImportedPage(reader, i);
                copy.addPage(page);
            }
            PRAcroForm form = reader.getAcroForm();
			if (form != null)
                copy.copyAcroForm(reader);
			document.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
	}


    /**
     * Generates a PDF file with selected pages from an existing PDF.
     *
     * @param args String[]
     */
    public static void main(String[] args) {
    	SelectedPages tool = new SelectedPages();
    	if (args.length < 4) {
    		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");
	}
}