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An Open Source JavaFX PDF Viewer
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2017 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---------------
* JavaFXSignaturesPanel.java
* ---------------
*/
package org.jpedal.examples.viewer.gui.javafx;
import java.util.Iterator;
import javafx.scene.control.Tab;
import javafx.scene.control.TreeCell;
import javafx.scene.control.TreeItem;
import javafx.scene.control.TreeView;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.VBox;
import javafx.util.Callback;
import org.jpedal.PdfDecoderInt;
import org.jpedal.objects.raw.FormObject;
import org.jpedal.objects.raw.PdfArrayIterator;
import org.jpedal.objects.raw.PdfDictionary;
import org.jpedal.objects.raw.PdfObject;
/**
*
* @author Simon
*/
public class JavaFXSignaturesPanel extends Tab {
final TreeView signatureTree;
final Image unlock;
final Image lock;
static final String signedText = "The following have digitally counter-signed this document";
static final String blankText = "The following signature fields are not signed";
public JavaFXSignaturesPanel(){
final VBox content = new VBox();
signatureTree = new TreeView();
unlock = new Image(getClass().getResource("/org/jpedal/examples/viewer/res/unlock.png").toExternalForm());
lock = new Image(getClass().getResource("/org/jpedal/examples/viewer/res/lock.gif").toExternalForm());
signatureTree.setCellFactory(new Callback, TreeCell>() {
@Override
public TreeCell call(final TreeView p) {
return new SignaturesCell();
}
});
content.getChildren().add(signatureTree);
setContent(content);
}
public void reinitialise(final PdfDecoderInt decode_pdf, final Iterator signatureObjects){
signatureTree.setRoot(null);
final TreeItem root = new TreeItem("Signatures");
final TreeItem signed = new TreeItem(signedText);
final TreeItem blank = new TreeItem(blankText);
// using getParent() == null was causing duplicate nodes to appear, so using manual checks instead
boolean addedSigned = false;
boolean addedBlank = false;
while (signatureObjects.hasNext()){
final FormObject formObj = signatureObjects.next();
final PdfObject sigObject = formObj.getDictionary(PdfDictionary.V);
decode_pdf.getIO().checkResolved(sigObject);
if(sigObject == null){
if(!addedBlank){
addedBlank = true;
root.getChildren().add(blank);
}
final TreeItem blankNode = new TreeItem(formObj.getTextStreamValue(PdfDictionary.T) + " on page " + formObj.getPageNumber());
blank.getChildren().add(blankNode);
}else{
if(!addedSigned){
addedSigned=true;
root.getChildren().add(signed);
}
final String name = sigObject.getTextStreamValue(PdfDictionary.Name);
final TreeItem owner = new TreeItem("Signed by " + name);
signed.getChildren().add(owner);
final TreeItem type = new TreeItem("Type");
owner.getChildren().add(type);
String filter = null;
final PdfArrayIterator filters = sigObject.getMixedArray(PdfDictionary.Filter);
if(filters != null && filters.hasMoreTokens()) {
filter = filters.getNextValueAsString(true);
}
final TreeItem filterNode = new TreeItem("Filter " + filter);
type.getChildren().add(filterNode);
final String subFilter = sigObject.getName(PdfDictionary.SubFilter);
final TreeItem subFilterNode = new TreeItem("Sub Filter: " + subFilter);
type.getChildren().add(subFilterNode);
final TreeItem details = new TreeItem("Details");
owner.getChildren().add(details);
final String rawDate = sigObject.getTextStreamValue(PdfDictionary.M);
if(rawDate != null){
final StringBuilder date = new StringBuilder(rawDate);
date.delete(0, 2);
date.insert(4, '/');
date.insert(7, '/');
date.insert(10, ' ');
date.insert(13, ':');
date.insert(16, ':');
date.insert(19, ' ');
final TreeItem time = new TreeItem("Time: " + date);
details.getChildren().add(time);
}else{
final TreeItem time = new TreeItem("Time: unset");
details.getChildren().add(time);
}
final String reason = sigObject.getTextStreamValue(PdfDictionary.Reason);
final TreeItem reasonNode = new TreeItem("Reason: " + reason);
details.getChildren().add(reasonNode);
final String location = sigObject.getTextStreamValue(PdfDictionary.Location);
final TreeItem locationNode = new TreeItem("Location: " + location);
details.getChildren().add(locationNode);
final TreeItem field = new TreeItem("Field: " + formObj.getTextStreamValue(PdfDictionary.T)+ " on page " + formObj.getPageNumber());
details.getChildren().add(field);
}
}
signatureTree.setRoot(root);
}
private class SignaturesCell extends TreeCell{
@Override
public void updateItem(final String item, final boolean empty){
super.updateItem(item, empty);
if(empty){
setText(null);
setGraphic(null);
}else{
final TreeItem parent = getTreeItem().getParent();
final String parentText = parent != null ? parent.getValue() : "";
if(parentText.equals(signedText)){
setGraphic(new ImageView(lock));
}else if(parentText.equals(blankText)){
setGraphic(new ImageView(unlock));
}
setText(item);
}
}
}
}