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iText, a free Java-PDF library
/*
* $Id: NUp.java 3427 2008-05-24 18:32:31Z xlv $
* 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.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.toolbox.AbstractTool;
import com.lowagie.toolbox.arguments.AbstractArgument;
import com.lowagie.toolbox.arguments.FileArgument;
import com.lowagie.toolbox.arguments.OptionArgument;
import com.lowagie.toolbox.arguments.filters.PdfFilter;
/**
* This tool lets you generate a PDF that shows N pages on 1.
* @since 2.1.1 (imported from itexttoolbox project)
*/
public class NUp extends AbstractTool {
static {
addVersion("$Id: NUp.java 3427 2008-05-24 18:32:31Z xlv $");
}
/**
* Constructs an NUp object.
*/
public NUp() {
menuoptions = MENU_EXECUTE | MENU_EXECUTE_SHOW;
arguments.add(new FileArgument(this, "srcfile", "The file you want to N-up", false, new PdfFilter()));
arguments.add(new FileArgument(this, "destfile", "The resulting PDF", true, new PdfFilter()));
OptionArgument oa = new OptionArgument(this, "pow2", "The number of pages you want to copy to 1 page");
oa.addOption("2", "1");
oa.addOption("4", "2");
oa.addOption("8", "3");
oa.addOption("16", "4");
oa.addOption("32", "5");
oa.addOption("64", "6");
arguments.add(oa);
}
/**
* @see com.lowagie.toolbox.AbstractTool#createFrame()
*/
protected void createFrame() {
internalFrame = new JInternalFrame("N-up", true, false, true);
internalFrame.setSize(300, 80);
internalFrame.setJMenuBar(getMenubar());
System.out.println("=== N-up 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");
int pow2;
try {
pow2 = Integer.parseInt((String) getValue("pow2"));
}
catch(Exception e) {
pow2 = 1;
}
// we create a reader for a certain document
PdfReader reader = new PdfReader(src.getAbsolutePath());
// we retrieve the total number of pages and the page size
int total = reader.getNumberOfPages();
System.out.println("There are " + total + " pages in the original file.");
Rectangle pageSize = reader.getPageSize(1);
Rectangle newSize = (pow2 % 2) == 0 ? new Rectangle(pageSize.getWidth(), pageSize.getHeight()) : new Rectangle(pageSize.getHeight(), pageSize.getWidth());
Rectangle unitSize = new Rectangle(pageSize.getWidth(), pageSize.getHeight());
Rectangle currentSize;
for (int i = 0; i < pow2; i++) {
unitSize = new Rectangle(unitSize.getHeight() / 2, unitSize.getWidth());
}
int n = (int)Math.pow(2, pow2);
int r = (int)Math.pow(2, pow2 / 2);
int c = n / r;
// step 1: creation of a document-object
Document document = new Document(newSize, 0, 0, 0, 0);
// 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();
// step 4: adding the content
PdfContentByte cb = writer.getDirectContent();
PdfImportedPage page;
float offsetX, offsetY, factor;
int p;
for (int i = 0; i < total; i++) {
if (i % n == 0) {
document.newPage();
}
p = i + 1;
offsetX = unitSize.getWidth() * ((i % n) % c);
offsetY = newSize.getHeight() - (unitSize.getHeight() * (((i % n) / c) + 1));
currentSize = reader.getPageSize(p);
factor = Math.min(unitSize.getWidth() / currentSize.getWidth(), unitSize.getHeight() / currentSize.getHeight());
offsetX += (unitSize.getWidth() - (currentSize.getWidth() * factor)) / 2f;
offsetY += (unitSize.getHeight() - (currentSize.getHeight() * factor)) / 2f;
page = writer.getImportedPage(reader, p);
cb.addTemplate(page, factor, 0, 0, factor, offsetX, offsetY);
}
// step 5: we close the document
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 an NUp version of an existing PDF file.
*
* @param args String[]
*/
public static void main(String[] args) {
NUp tool = new NUp();
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");
}
}