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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
*
* ---------------
* RecentDocuments.java
* ---------------
*/
package org.jpedal.examples.viewer;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Stack;
import java.util.StringTokenizer;
import javax.swing.JMenuItem;
import org.jpedal.examples.viewer.commands.SaveFile;
import org.jpedal.examples.viewer.utils.Printer;
import org.jpedal.examples.viewer.utils.PropertiesFile;
import org.jpedal.gui.GUIFactory;
import org.jpedal.utils.Messages;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class RecentDocuments implements RecentDocumentsFactory {
//int noOfRecentDocs;
//PropertiesFile properties;
public final int noOfRecentDocs;
private final Stack previousFiles = new Stack();
private final Stack nextFiles = new Stack();
public final JMenuItem[] recentDocuments;
public RecentDocuments(final int noOfRecentDocs) {
this.noOfRecentDocs = noOfRecentDocs;
recentDocuments = new JMenuItem[noOfRecentDocs];
//this.noOfRecentDocs=noOfRecentDocs;
//this.properties=properties;
}
/**
* Convert the provided file name into a shortened file name
*
* @param fileNameToAdd String value of the filename
* @return String value representing the shortened file name
*/
static String getShortenedFileName(final String fileNameToAdd) {
final int maxChars = 30;
if (fileNameToAdd.length() <= maxChars) {
return fileNameToAdd;
}
final StringTokenizer st = new StringTokenizer(fileNameToAdd, "\\/");
final int noOfTokens = st.countTokens();
//allow for /filename.pdf
if (noOfTokens == 1) {
return fileNameToAdd.substring(0, maxChars);
}
final String[] arrayedFile = new String[noOfTokens];
for (int i = 0; i < noOfTokens; i++) {
arrayedFile[i] = st.nextToken();
}
final String filePathBody = fileNameToAdd.substring(arrayedFile[0].length(),
fileNameToAdd.length() - arrayedFile[noOfTokens - 1].length());
final StringBuilder sb = new StringBuilder(filePathBody);
int start, end;
for (int i = noOfTokens - 2; i > 0; i--) {
start = sb.lastIndexOf(arrayedFile[i]);
end = start + arrayedFile[i].length();
sb.replace(start, end, "...");
if (sb.length() <= maxChars) {
break;
}
}
return arrayedFile[0] + sb + arrayedFile[noOfTokens - 1];
}
/**
* Get the previously opened documents file name
*
* @return String value representing the documents file name
*/
@Override
public String getPreviousDocument() {
String fileToOpen = null;
if (previousFiles.size() > 1) {
nextFiles.push(previousFiles.pop());
fileToOpen = previousFiles.pop();
}
return fileToOpen;
}
/**
* Get the file name of the next document in the list.
* This can be used to move through the list of recent files *
*
* @return String value representing the documents file name
*/
@Override
public String getNextDocument() {
String fileToOpen = null;
if (!nextFiles.isEmpty()) {
fileToOpen = nextFiles.pop();
}
return fileToOpen;
}
/**
* Adds a file to the list of recent file
*
* @param selectedFile String representing a file name
*/
@Override
public void addToFileList(final String selectedFile) {
previousFiles.push(selectedFile);
}
/**
* Control if recent documents items should be enabled and visible
*
* @param enable True to show and enable the recent documents items, false otherwise
*/
@Override
public void enableRecentDocuments(final boolean enable) {
if (recentDocuments == null) {
return;
}
for (int i = 0; i < recentDocuments.length; i++) {
if (recentDocuments[i] != null && !recentDocuments[i].getText().equals(i + 1 + ": ")) {
recentDocuments[i].setVisible(enable);
recentDocuments[i].setEnabled(enable);
}
}
}
/**
* Set the recent documents items from the set of values provided
*
* @param recentDocs String array of file names to load into the recent documents
*/
@Override
public void updateRecentDocuments(final String[] recentDocs) {
if (recentDocs == null) {
return;
}
for (int i = 0; i < recentDocs.length; i++) {
if (recentDocs[i] != null) {
final String shortenedFileName = getShortenedFileName(recentDocs[i]);
if (recentDocuments[i] == null) {
recentDocuments[i] = new JMenuItem();
}
recentDocuments[i].setText(i + 1 + ": " + shortenedFileName);
if (recentDocuments[i].getText().equals(i + 1 + ": ")) {
recentDocuments[i].setVisible(false);
} else {
recentDocuments[i].setVisible(true);
}
recentDocuments[i].setName(recentDocs[i]);
}
}
}
/**
* Remove all items from the recent documents list and stored in properties list
*
* @param properties PropertiesFile object holding the recent documents to clear
*/
@Override
public void clearRecentDocuments(final PropertiesFile properties) {
final NodeList nl = properties.getDoc().getElementsByTagName("recentfiles");
if (nl != null && nl.getLength() > 0) {
final NodeList allRecentDocs = ((Element) nl.item(0)).getElementsByTagName("*");
for (int i = 0; i < allRecentDocs.getLength(); i++) {
final Node item = allRecentDocs.item(i);
nl.item(0).removeChild(item);
}
}
for (int i = 0; i < noOfRecentDocs; i++) {
recentDocuments[i].setText(i + 1 + ": ");
recentDocuments[i].setVisible(false);
}
}
/**
* Create the menu items used to represent the recent documents in the Viewer menu
*
* @param fileNameToAdd String filename for the menu item
* @param position int value representing the position in the recent documents
* @param currentGUI GUIFactory object to add the menu item to
* @param commonValues Values object used by the view
*/
@Override
public void createMenuItems(final String fileNameToAdd, final int position, final GUIFactory currentGUI,
final Values commonValues) {
final String shortenedFileName = RecentDocuments.getShortenedFileName(fileNameToAdd);
recentDocuments[position] = new JMenuItem(position + 1 + ": " + shortenedFileName);
if (recentDocuments[position].getText().equals(position + 1 + ": ")) {
recentDocuments[position].setVisible(false);
}
recentDocuments[position].addActionListener(new ActionListener() {
@Override
public void actionPerformed(final ActionEvent e) {
if (Printer.isPrinting()) {
currentGUI.showMessageDialog(Messages.getMessage("PdfViewerPrintWait.message"));
} else if (Values.isProcessing()) {
currentGUI.showMessageDialog(Messages.getMessage("PdfViewerDecodeWait.message"));
} else {
/*
* warn user on forms
*/
SaveFile.handleUnsaveForms(currentGUI, commonValues);
final JMenuItem item = (JMenuItem) e.getSource();
final String fileName = item.getName();
if (!fileName.isEmpty()) {
currentGUI.open(fileName);
}
}
}
});
recentDocuments[position].setName(fileNameToAdd);
currentGUI.getMenuItems().addToMenu(recentDocuments[position], Commands.FILEMENU);
}
}
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