📄 pdfinformationpanel.java
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/*
* $Id: PdfInformationPanel.java 3372 2008-05-12 03:16:52Z xlv $
* Copyright (c) 2005-2007 Carsten Hammer, 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 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.swing;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import javax.swing.JFileChooser;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.SwingConstants;
import com.lowagie.text.pdf.PdfDate;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.RandomAccessFileOrArray;
/**
* Label for the FileChooser
* @since 2.1.1 (imported from itexttoolbox project) */
public class PdfInformationPanel extends JPanel implements PropertyChangeListener {
/** A serial version id */
private static final long serialVersionUID = -4171577284617028707L;
/** The file name of the PDF we're going to label. */
String filename = "";
/** the label containing the metadata */
JLabel label = new JLabel();
/** the scrollpane to scroll through the label */
JScrollPane scrollpane = new JScrollPane();
/** the panel to witch the scrollpane will be added. */
JPanel panel = new JPanel();
/** Construct the information label (actually it's a JPanel). */
public PdfInformationPanel() {
try {
this.setLayout(new BorderLayout());
label.setHorizontalAlignment(SwingConstants.CENTER);
panel.setLayout(new BorderLayout());
this.add(panel, BorderLayout.CENTER);
scrollpane.setPreferredSize(new Dimension(200, 200));
panel.add(scrollpane, BorderLayout.CENTER);
scrollpane.setViewportView(label);
} catch (Exception ex) {
ex.printStackTrace();
}
}
/**
* Reads a PDF file for retrieving its metadata.
*
* @param file File
*/
public void createTextFromPDF(File file) {
if (file.exists()) {
int page = 1;
PdfReader reader = null;
try {
reader = new PdfReader(new RandomAccessFileOrArray(file.getAbsolutePath()), null);
HashMap<String, String> pdfinfo = reader.getInfo();
StringBuffer sb = new StringBuffer();
sb.append("<html>=== Document Information ===<p>");
sb.append(reader.getCropBox(page).getHeight() + "*"
+ reader.getCropBox(page).getWidth() + "<p>");
sb.append("PDF Version: " + reader.getPdfVersion() + "<p>");
sb.append("Number of pages: " + reader.getNumberOfPages()
+ "<p>");
sb.append("Number of PDF objects: " + reader.getXrefSize()
+ "<p>");
sb.append("File length: " + reader.getFileLength() + "<p>");
sb.append("Encrypted= " + reader.isEncrypted() + "<p>");
if (pdfinfo.get("Title") != null) {
sb.append("Title= " + pdfinfo.get("Title") + "<p>");
}
if (pdfinfo.get("Author") != null) {
sb.append("Author= " + pdfinfo.get("Author") + "<p>");
}
if (pdfinfo.get("Subject") != null) {
sb.append("Subject= " + pdfinfo.get("Subject") + "<p>");
}
if (pdfinfo.get("Producer") != null) {
sb.append("Producer= " + pdfinfo.get("Producer") + "<p>");
}
if (pdfinfo.get("ModDate") != null) {
sb.append("ModDate= "
+ PdfDate.decode(pdfinfo.get("ModDate"))
.getTime() + "<p>");
}
if (pdfinfo.get("CreationDate") != null) {
sb.append("CreationDate= "
+ PdfDate.decode(
pdfinfo.get("CreationDate"))
.getTime() + "<p>");
}
sb.append("</html>");
label.setText(sb.toString());
} catch (IOException ex) {
label.setText("");
}
}
}
/**
*
* @see java.beans.PropertyChangeListener#propertyChange(java.beans.PropertyChangeEvent)
* @param evt PropertyChangeEvent
*/
public void propertyChange(PropertyChangeEvent evt) {
filename = evt.getPropertyName();
if (filename.equals(JFileChooser.SELECTED_FILE_CHANGED_PROPERTY)) {
File file = (File) evt.getNewValue();
if (file != null) {
this.createTextFromPDF(file);
this.repaint();
}
}
}
}
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