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1   /**
2    * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
3    */
4   package net.sourceforge.pmd.cpd;
5   
6   import java.awt.BorderLayout;
7   import java.awt.Component;
8   import java.awt.Dimension;
9   import java.awt.Point;
10  import java.awt.Toolkit;
11  import java.awt.datatransfer.StringSelection;
12  import java.awt.event.ActionEvent;
13  import java.awt.event.ActionListener;
14  import java.awt.event.ItemEvent;
15  import java.awt.event.ItemListener;
16  import java.awt.event.KeyEvent;
17  import java.awt.event.MouseAdapter;
18  import java.awt.event.MouseEvent;
19  import java.io.File;
20  import java.io.FileOutputStream;
21  import java.io.IOException;
22  import java.io.PrintWriter;
23  import java.util.ArrayList;
24  import java.util.Collections;
25  import java.util.Comparator;
26  import java.util.HashMap;
27  import java.util.HashSet;
28  import java.util.Iterator;
29  import java.util.List;
30  import java.util.Map;
31  import java.util.Properties;
32  import java.util.Set;
33  
34  import javax.swing.AbstractButton;
35  import javax.swing.BorderFactory;
36  import javax.swing.JButton;
37  import javax.swing.JCheckBox;
38  import javax.swing.JCheckBoxMenuItem;
39  import javax.swing.JComboBox;
40  import javax.swing.JComponent;
41  import javax.swing.JFileChooser;
42  import javax.swing.JFrame;
43  import javax.swing.JLabel;
44  import javax.swing.JMenu;
45  import javax.swing.JMenuBar;
46  import javax.swing.JMenuItem;
47  import javax.swing.JOptionPane;
48  import javax.swing.JPanel;
49  import javax.swing.JProgressBar;
50  import javax.swing.JScrollPane;
51  import javax.swing.JTable;
52  import javax.swing.JTextArea;
53  import javax.swing.JTextField;
54  import javax.swing.KeyStroke;
55  import javax.swing.SwingConstants;
56  import javax.swing.Timer;
57  import javax.swing.event.ListSelectionEvent;
58  import javax.swing.event.ListSelectionListener;
59  import javax.swing.event.TableModelListener;
60  import javax.swing.table.DefaultTableCellRenderer;
61  import javax.swing.table.JTableHeader;
62  import javax.swing.table.TableColumn;
63  import javax.swing.table.TableColumnModel;
64  import javax.swing.table.TableModel;
65  
66  import net.sourceforge.pmd.PMD;
67  import net.sourceforge.pmd.util.IOUtil;
68  
69  public class GUI implements CPDListener {
70  
71  //	private interface Renderer {
72  //		String render(Iterator<Match> items);
73  //	}
74  	
75  	private static final Object[][] RENDERER_SETS = new Object[][] {
76  		{ "Text", 		new Renderer() { public String render(Iterator<Match> items) { return new SimpleRenderer().render(items); } } },
77  		{ "XML", 		new Renderer() { public String render(Iterator<Match> items) { return new XMLRenderer().render(items); } } },
78  		{ "CSV (comma)",new Renderer() { public String render(Iterator<Match> items) { return new CSVRenderer(',').render(items); } } },
79  		{ "CSV (tab)",	new Renderer() { public String render(Iterator<Match> items) { return new CSVRenderer('\t').render(items); } } }
80  		};
81  	
82  	private static abstract class LanguageConfig {
83  		public abstract Language languageFor(LanguageFactory lf, Properties p);
84  		public boolean canIgnoreIdentifiers() { return false; }
85  		public boolean canIgnoreLiterals() { return false; }
86  		public boolean canIgnoreAnnotations() { return false; }
87  		public abstract String[] extensions();
88  	};
89  	
90  	private static final Object[][] LANGUAGE_SETS = new Object[][] {
91  		{"Java", 			new LanguageConfig() { 
92  									public Language languageFor(LanguageFactory lf, Properties p) { return lf.createLanguage("java"); }
93  									public boolean canIgnoreIdentifiers() { return true; }
94  									public boolean canIgnoreLiterals() { return true; }
95  									public boolean canIgnoreAnnotations() { return true; }
96  									public String[] extensions() { return new String[] {".java", ".class" }; }; } },
97  		{"JSP", 			new LanguageConfig() { 
98  									public Language languageFor(LanguageFactory lf, Properties p) { return lf.createLanguage("jsp"); }
99  									public String[] extensions() { return new String[] {".jsp" }; }; } },
100 		{"C++", 			new LanguageConfig() { 
101 									public Language languageFor(LanguageFactory lf, Properties p) { return lf.createLanguage("cpp"); }
102 									public String[] extensions() { return new String[] {".cpp", ".c" }; }; } },
103 		{"Ruby",			new LanguageConfig() { 
104 									public Language languageFor(LanguageFactory lf, Properties p) { return lf.createLanguage("ruby"); }
105 									public String[] extensions() { return new String[] {".rb" }; }; } },
106 		{"Fortran",			new LanguageConfig() {
107 									public Language languageFor(LanguageFactory lf, Properties p) { return lf.createLanguage("fortran"); }
108 									public String[] extensions() { return new String[] {".rb" }; }; } },
109 		{"by extension...", new LanguageConfig() {
110 									public Language languageFor(LanguageFactory lf, Properties p) { return lf.createLanguage(LanguageFactory.BY_EXTENSION, p); }
111 									public String[] extensions() { return new String[] {"" }; }; } },
112 		{"PHP", 			new LanguageConfig() { 
113 									public Language languageFor(LanguageFactory lf, Properties p) { return lf.createLanguage("php"); }
114 									public String[] extensions() { return new String[] {".php" }; };	} },
115 		{"C#", 			    new LanguageConfig() {
116 									public Language languageFor(LanguageFactory lf, Properties p) { return lf.createLanguage("cs"); }
117 									public String[] extensions() { return new String[] {".cs" }; };	} },
118 		};
119 	
120 	private static final int		DEFAULT_CPD_MINIMUM_LENGTH = 75;
121 	private static final Map		LANGUAGE_CONFIGS_BY_LABEL = new HashMap(LANGUAGE_SETS.length);
122 	private static final KeyStroke	COPY_KEY_STROKE = KeyStroke.getKeyStroke(KeyEvent.VK_C,ActionEvent.CTRL_MASK,false);
123 	private static final KeyStroke	DELETE_KEY_STROKE = KeyStroke.getKeyStroke(KeyEvent.VK_DELETE, 0);
124 	
125 	private class ColumnSpec {
126 		private String label;
127 		private int alignment;
128 		private int width;
129 		private Comparator<Match> sorter;
130 		
131 		public ColumnSpec(String aLabel, int anAlignment, int aWidth, Comparator<Match> aSorter) {
132 			label = aLabel;
133 			alignment = anAlignment;
134 			width = aWidth;
135 			sorter = aSorter;
136 		}
137 		public String label() { return label; };
138 		public int alignment() { return alignment; };
139 		public int width() { return width; };
140 		public Comparator<Match> sorter() { return sorter; };
141 	}
142 
143 	private final ColumnSpec[] matchColumns = new ColumnSpec[] {
144 		new ColumnSpec("Source", 	SwingConstants.LEFT, -1, Match.LABEL_COMPARATOR),
145 		new ColumnSpec("Matches", 	SwingConstants.RIGHT, 60, Match.MATCHES_COMPARATOR),
146 		new ColumnSpec("Lines", 	SwingConstants.RIGHT, 45, Match.LINES_COMPARATOR),
147 		};
148     
149 	static {		
150 		for (int i=0; i<LANGUAGE_SETS.length; i++) {
151 			LANGUAGE_CONFIGS_BY_LABEL.put(LANGUAGE_SETS[i][0], LANGUAGE_SETS[i][1]);
152 		}
153 	}
154 	
155 	private static LanguageConfig languageConfigFor(String label) {
156 		return (LanguageConfig)LANGUAGE_CONFIGS_BY_LABEL.get(label);
157 	}
158 	
159     private static class CancelListener implements ActionListener {
160         public void actionPerformed(ActionEvent e) {
161             System.exit(0);
162         }
163     }
164 
165     private class GoListener implements ActionListener {
166         public void actionPerformed(ActionEvent e) {
167             new Thread(new Runnable() {
168                 public void run() {
169                     tokenizingFilesBar.setValue(0);
170                     tokenizingFilesBar.setString("");
171                     resultsTextArea.setText("");
172                     phaseLabel.setText("");
173                     timeField.setText("");
174                     go();
175                 }
176             }).start();
177         }
178     }
179     
180     private class SaveListener implements ActionListener {
181     	
182     	final Renderer renderer;
183     	
184     	public SaveListener(Renderer theRenderer) {
185     		renderer = theRenderer;
186     	}
187     	
188         public void actionPerformed(ActionEvent evt) {
189             JFileChooser fcSave	= new JFileChooser();
190             int ret = fcSave.showSaveDialog(GUI.this.frame);
191             File f = fcSave.getSelectedFile();
192             if (f == null || ret != JFileChooser.APPROVE_OPTION) {
193         	return;
194             }
195                         
196             if (!f.canWrite()) {
197                 PrintWriter pw = null;
198                 try {
199                     pw = new PrintWriter(new FileOutputStream(f));
200                     pw.write(renderer.render(matches.iterator()));
201                     pw.flush();
202                     JOptionPane.showMessageDialog(frame, "Saved " + matches.size() + " matches");
203                 } catch (IOException e) {
204                     error("Couldn't save file" + f.getAbsolutePath(), e);
205                 } finally {
206                     IOUtil.closeQuietly(pw);
207                 }
208             } else {
209                 error("Could not write to file " + f.getAbsolutePath(), null);
210             }
211         }
212 
213         private void error(String message, Exception e) {
214             if (e != null) {
215                 e.printStackTrace();
216             }
217             JOptionPane.showMessageDialog(GUI.this.frame, message);
218         }
219 
220     }
221 
222     private class BrowseListener implements ActionListener {
223         public void actionPerformed(ActionEvent e) {
224             JFileChooser fc = new JFileChooser(rootDirectoryField.getText());
225             fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
226             fc.showDialog(frame, "Select");
227             if (fc.getSelectedFile() != null) {
228                 rootDirectoryField.setText(fc.getSelectedFile().getAbsolutePath());
229             }
230         }
231     }
232     
233 	private class AlignmentRenderer extends DefaultTableCellRenderer {
234 		
235 		private int[] alignments;
236 		
237 		public AlignmentRenderer(int[] theAlignments) {
238 			alignments = theAlignments;
239 		};
240 		
241 		public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
242 			super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
243  
244 			setHorizontalAlignment(alignments[column]);
245  
246 			return this;
247 		}
248 	}
249     
250     private JTextField rootDirectoryField	= new JTextField(System.getProperty("user.home"));
251     private JTextField minimumLengthField	= new JTextField(Integer.toString(DEFAULT_CPD_MINIMUM_LENGTH));
252     private JTextField encodingField		= new JTextField(System.getProperty("file.encoding"));
253     private JTextField timeField			= new JTextField(6);
254     private JLabel phaseLabel				= new JLabel();
255     private JProgressBar tokenizingFilesBar = new JProgressBar();
256     private JTextArea resultsTextArea		= new JTextArea();
257     private JCheckBox recurseCheckbox		= new JCheckBox("", true);
258     private JCheckBox ignoreIdentifiersCheckbox = new JCheckBox("", false);
259     private JCheckBox ignoreLiteralsCheckbox = new JCheckBox("", false);
260     private JCheckBox ignoreAnnotationsCheckbox = new JCheckBox("", false);
261     private JComboBox languageBox			= new JComboBox();
262     private JTextField extensionField		= new JTextField();
263     private JLabel extensionLabel			= new JLabel("Extension:", SwingConstants.RIGHT);
264     private JTable resultsTable				= new JTable();    
265     private JButton goButton;
266     private JButton cancelButton;
267     private JPanel progressPanel;
268     private JFrame frame;
269     private boolean trimLeadingWhitespace;
270 
271     private List<Match> matches = new ArrayList<Match>();
272 
273     private void addSaveOptionsTo(JMenu menu) {
274     	
275         JMenuItem saveItem;
276         
277         for (int i=0; i<RENDERER_SETS.length; i++) {
278         	saveItem = new JMenuItem("Save as " + RENDERER_SETS[i][0]);
279         	saveItem.addActionListener(new SaveListener((Renderer)RENDERER_SETS[i][1]));
280         	menu.add(saveItem);
281         }
282     }
283     
284     public GUI() {
285         frame = new JFrame("PMD Duplicate Code Detector (v " + PMD.VERSION + ')');
286 
287         timeField.setEditable(false);
288 
289         JMenu fileMenu = new JMenu("File");
290         fileMenu.setMnemonic('f');
291         
292         addSaveOptionsTo(fileMenu);
293              
294         JMenuItem exitItem = new JMenuItem("Exit");
295         exitItem.setMnemonic('x');
296         exitItem.addActionListener(new CancelListener());
297         fileMenu.add(exitItem);
298         JMenu viewMenu = new JMenu("View");
299         fileMenu.setMnemonic('v');
300         JMenuItem trimItem = new JCheckBoxMenuItem("Trim leading whitespace");
301         trimItem.addItemListener(new ItemListener() {
302             public void itemStateChanged(ItemEvent e) {
303                 AbstractButton button = (AbstractButton)e.getItem();
304                 GUI.this.trimLeadingWhitespace = button.isSelected();
305             }
306         });
307         viewMenu.add(trimItem);
308         JMenuBar menuBar = new JMenuBar();
309         menuBar.add(fileMenu);
310         menuBar.add(viewMenu);
311         frame.setJMenuBar(menuBar);
312 
313         // first make all the buttons
314         JButton browseButton = new JButton("Browse");
315         browseButton.setMnemonic('b');
316         browseButton.addActionListener(new BrowseListener());
317         goButton = new JButton("Go");
318         goButton.setMnemonic('g');
319         goButton.addActionListener(new GoListener());
320         cancelButton = new JButton("Cancel");
321         cancelButton.addActionListener(new CancelListener());
322 
323         JPanel settingsPanel = makeSettingsPanel(browseButton, goButton, cancelButton);
324         progressPanel = makeProgressPanel();
325         JPanel resultsPanel = makeResultsPanel();
326 
327         adjustLanguageControlsFor((LanguageConfig)LANGUAGE_SETS[0][1]);
328         
329         frame.getContentPane().setLayout(new BorderLayout());
330         JPanel topPanel = new JPanel();
331         topPanel.setLayout(new BorderLayout());
332         topPanel.add(settingsPanel, BorderLayout.NORTH);
333         topPanel.add(progressPanel, BorderLayout.CENTER);
334         setProgressControls(false);	// not running now        
335         frame.getContentPane().add(topPanel, BorderLayout.NORTH);
336         frame.getContentPane().add(resultsPanel, BorderLayout.CENTER);
337         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
338         frame.pack();
339         frame.setVisible(true);
340     }
341 
342     private void adjustLanguageControlsFor(LanguageConfig current) {
343          ignoreIdentifiersCheckbox.setEnabled(current.canIgnoreIdentifiers());
344          ignoreLiteralsCheckbox.setEnabled(current.canIgnoreLiterals());
345          ignoreAnnotationsCheckbox.setEnabled(current.canIgnoreAnnotations());
346          extensionField.setText(current.extensions()[0]);
347          boolean enableExtension = current.extensions()[0].length() == 0;
348          extensionField.setEnabled(enableExtension);
349          extensionLabel.setEnabled(enableExtension);
350     }
351     
352     private JPanel makeSettingsPanel(JButton browseButton, JButton goButton, JButton cxButton) {
353         JPanel settingsPanel = new JPanel();
354         GridBagHelper helper = new GridBagHelper(settingsPanel, new double[]{0.2, 0.7, 0.1, 0.1});
355         helper.addLabel("Root source directory:");
356         helper.add(rootDirectoryField);
357         helper.add(browseButton, 2);
358         helper.nextRow();
359         helper.addLabel("Report duplicate chunks larger than:");
360         minimumLengthField.setColumns(4);
361         helper.add(minimumLengthField);
362         helper.addLabel("Language:");
363         for (int i=0; i<LANGUAGE_SETS.length; i++) {
364         	languageBox.addItem(LANGUAGE_SETS[i][0]);
365         }
366         languageBox.addActionListener(new ActionListener() {
367             public void actionPerformed(ActionEvent e) {
368             	adjustLanguageControlsFor(
369             			languageConfigFor((String)languageBox.getSelectedItem())
370             			);
371             }
372         });
373         helper.add(languageBox);
374         helper.nextRow();
375         helper.addLabel("Also scan subdirectories?");
376         helper.add(recurseCheckbox);
377 
378         helper.add(extensionLabel);
379         helper.add(extensionField);
380 
381         helper.nextRow();
382         helper.addLabel("Ignore literals?");
383         helper.add(ignoreLiteralsCheckbox);
384         helper.addLabel("");
385         helper.addLabel("");
386         helper.nextRow();
387 
388         helper.nextRow();
389         helper.addLabel("Ignore identifiers?");
390         helper.add(ignoreIdentifiersCheckbox);
391         helper.addLabel("");
392         helper.addLabel("");
393         helper.nextRow();
394 
395         helper.nextRow();
396         helper.addLabel("Ignore annotations?");
397         helper.add(ignoreAnnotationsCheckbox);
398         helper.add(goButton);
399         helper.add(cxButton);
400         helper.nextRow();
401 
402         helper.addLabel("File encoding (defaults based upon locale):");
403         encodingField.setColumns(1);
404         helper.add(encodingField);
405         helper.addLabel("");
406         helper.addLabel("");
407         helper.nextRow();
408 //        settingsPanel.setBorder(BorderFactory.createTitledBorder("Settings"));
409         return settingsPanel;
410     }
411 
412     private JPanel makeProgressPanel() {
413         JPanel progressPanel = new JPanel();
414         final double[] weights = {0.0, 0.8, 0.4, 0.2};
415         GridBagHelper helper = new GridBagHelper(progressPanel, weights);
416         helper.addLabel("Tokenizing files:");
417         helper.add(tokenizingFilesBar, 3);
418         helper.nextRow();
419         helper.addLabel("Phase:");
420         helper.add(phaseLabel);
421         helper.addLabel("Time elapsed:");
422         helper.add(timeField);
423         helper.nextRow();
424         progressPanel.setBorder(BorderFactory.createTitledBorder("Progress"));
425         return progressPanel;
426     }
427     
428     private JPanel makeResultsPanel() {
429         JPanel resultsPanel = new JPanel();
430         resultsPanel.setLayout(new BorderLayout());
431         JScrollPane areaScrollPane = new JScrollPane(resultsTextArea);
432         resultsTextArea.setEditable(false);
433         areaScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
434         areaScrollPane.setPreferredSize(new Dimension(600, 300));
435         
436         resultsPanel.add(makeMatchList(), BorderLayout.WEST);
437         resultsPanel.add(areaScrollPane, BorderLayout.CENTER);
438         return resultsPanel;
439     }
440 
441     private void populateResultArea() {
442     	int[] selectionIndices = resultsTable.getSelectedRows();
443     	TableModel model = resultsTable.getModel();
444     	List<Match> selections = new ArrayList<Match>(selectionIndices.length);
445     	for (int i=0; i<selectionIndices.length; i++) {
446     		selections.add((Match)model.getValueAt(selectionIndices[i], 99));
447     	}
448     	String report = new SimpleRenderer(trimLeadingWhitespace).render(selections.iterator());
449     	resultsTextArea.setText(report);
450     	resultsTextArea.setCaretPosition(0);	// move to the top
451     }
452         
453     private void copyMatchListSelectionsToClipboard() {
454     	
455     	int[] selectionIndices = resultsTable.getSelectedRows();
456     	int colCount = resultsTable.getColumnCount();
457     	
458     	StringBuilder sb = new StringBuilder();
459     	    	
460     	for (int r=0; r<selectionIndices.length; r++) {
461 			if (r > 0) {
462 			    sb.append('\n');
463 			}
464 			sb.append(resultsTable.getValueAt(selectionIndices[r], 0));
465     		for (int c=1; c<colCount; c++) {
466     			sb.append('\t');
467     			sb.append(resultsTable.getValueAt(selectionIndices[r], c));
468     		}
469     	}
470     	
471     	StringSelection ss = new StringSelection(sb.toString());
472         Toolkit.getDefaultToolkit().getSystemClipboard().setContents(ss, null);
473     }
474     
475     private void deleteMatchlistSelections() {
476     	
477     	int[] selectionIndices = resultsTable.getSelectedRows();
478     	
479     	for (int i=selectionIndices.length-1; i >=0; i--) {
480     		matches.remove(selectionIndices[i]);
481     	}
482     	
483     	resultsTable.getSelectionModel().clearSelection();
484     	resultsTable.addNotify();
485     }
486     
487     private JComponent makeMatchList() {
488     	
489     	resultsTable.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
490 			public void valueChanged(ListSelectionEvent e) {
491 				populateResultArea();				
492 			}});
493     	
494     	resultsTable.registerKeyboardAction(new ActionListener() {
495 			public void actionPerformed(ActionEvent e) { copyMatchListSelectionsToClipboard(); } 
496     		},"Copy", COPY_KEY_STROKE, JComponent.WHEN_FOCUSED);
497     	
498     	resultsTable.registerKeyboardAction(new ActionListener() {
499 			public void actionPerformed(ActionEvent e) { deleteMatchlistSelections(); } 
500     		},"Del", DELETE_KEY_STROKE, JComponent.WHEN_FOCUSED);
501     	
502     	int[] alignments = new int[matchColumns.length];
503     	for (int i=0; i<alignments.length; i++) {
504     	    alignments[i] = matchColumns[i].alignment();
505     	}
506 
507     	resultsTable.setDefaultRenderer(Object.class, new AlignmentRenderer(alignments));
508     	
509     	final JTableHeader header = resultsTable.getTableHeader();
510     	header.addMouseListener( new MouseAdapter() {
511 			public void mouseClicked(MouseEvent e) {
512 				sortOnColumn(header.columnAtPoint(new Point(e.getX(), e.getY())));
513 				}
514 			});
515     	
516         return new JScrollPane(resultsTable);
517     }
518     
519     private boolean isLegalPath(String path, LanguageConfig config) {
520     	String[] extensions = config.extensions();
521     	for (int i=0; i<extensions.length; i++) {
522     		if (path.endsWith(extensions[i]) && extensions[i].length() > 0) {
523     		    return true;
524     		}
525     	}
526     	return false;
527     }
528     
529     private String setLabelFor(Match match) {
530     	
531     	Set<String> sourceIDs = new HashSet<String>(match.getMarkCount());
532     	for (Iterator<TokenEntry> occurrences = match.iterator(); occurrences.hasNext();) {
533              sourceIDs.add(occurrences.next().getTokenSrcID());
534           }
535     	String label;
536     	
537     	if (sourceIDs.size() == 1) {
538     		String sourceId = sourceIDs.iterator().next();
539     		int separatorPos = sourceId.lastIndexOf(File.separatorChar);
540     		label = "..." + sourceId.substring(separatorPos);
541     		} else {
542     	    	label = "(" + sourceIDs.size() + " separate files)";
543     		}
544     		
545     	match.setLabel(label);
546     	return label;
547     }
548     
549     private void setProgressControls(boolean isRunning) {
550         progressPanel.setVisible(isRunning);
551         goButton.setEnabled(!isRunning);
552         cancelButton.setEnabled(isRunning);
553     }
554     
555     private void go() {
556     	String dirPath = rootDirectoryField.getText();
557         try {
558             if (!(new File(dirPath)).exists()) {
559                 JOptionPane.showMessageDialog(frame,
560                         "Can't read from that root source directory",
561                         "Error", JOptionPane.ERROR_MESSAGE);
562                 return;
563             }
564       
565             setProgressControls(true);
566 
567             Properties p = new Properties();
568             p.setProperty(JavaTokenizer.IGNORE_IDENTIFIERS, String.valueOf(ignoreIdentifiersCheckbox.isSelected()));
569             p.setProperty(JavaTokenizer.IGNORE_LITERALS, String.valueOf(ignoreLiteralsCheckbox.isSelected()));
570             p.setProperty(JavaTokenizer.IGNORE_ANNOTATIONS, String.valueOf(ignoreAnnotationsCheckbox.isSelected()));
571             p.setProperty(LanguageFactory.EXTENSION, extensionField.getText());
572             LanguageConfig conf = languageConfigFor((String)languageBox.getSelectedItem());
573             Language language = conf.languageFor(new LanguageFactory(), p);
574             CPDConfiguration config = new CPDConfiguration(
575             		Integer.parseInt(minimumLengthField.getText()), 
576             		language, encodingField.getText()
577             		);
578             CPD cpd = new CPD(config);
579             cpd.setCpdListener(this);
580             tokenizingFilesBar.setMinimum(0);
581             phaseLabel.setText("");
582             if (isLegalPath(dirPath, conf)) {	// should use the language file filter instead?
583             	cpd.add(new File(dirPath));
584             } else {
585                 if (recurseCheckbox.isSelected()) {
586                     cpd.addRecursively(dirPath);
587                 } else {
588                     cpd.addAllInDirectory(dirPath);
589                 }
590             }
591             Timer t = createTimer();
592             t.start();
593             cpd.go();
594             t.stop();
595             
596         	matches = new ArrayList<Match>();
597         	Match match;
598         	for (Iterator<Match> i = cpd.getMatches(); i.hasNext();) {
599         		match = i.next();
600         		setLabelFor(match);
601         		matches.add(match);
602         	}
603 
604             String report = new SimpleRenderer().render(cpd.getMatches());
605             if (report.length() == 0) {
606                 JOptionPane.showMessageDialog(frame,
607                         "Done; couldn't find any duplicates longer than " + minimumLengthField.getText() + " tokens");
608             } else {
609                 resultsTextArea.setText(report);
610                 setListDataFrom(cpd.getMatches());
611                 
612             }
613         } catch (IOException t) {
614             t.printStackTrace();
615             JOptionPane.showMessageDialog(frame, "Halted due to " + t.getClass().getName() + "; " + t.getMessage());
616         } catch (RuntimeException t) {
617             t.printStackTrace();
618             JOptionPane.showMessageDialog(frame, "Halted due to " + t.getClass().getName() + "; " + t.getMessage());
619         }
620         setProgressControls(false);
621     }
622 
623 	private Timer createTimer() {
624 		
625 		final long start = System.currentTimeMillis();
626 		
627 		Timer t = new Timer(1000, new ActionListener() {
628 		    public void actionPerformed(ActionEvent e) {
629 		        long now = System.currentTimeMillis();
630 		        long elapsedMillis = now - start;
631 		        long elapsedSeconds = elapsedMillis / 1000;
632 		        long minutes = (long) Math.floor(elapsedSeconds / 60);
633 		        long seconds = elapsedSeconds - (minutes * 60);
634 		        timeField.setText(formatTime(minutes, seconds));
635 		    }
636 		});
637 		return t;
638 	}
639 	
640 	private static String formatTime(long minutes, long seconds) {
641 		
642 		StringBuilder sb = new StringBuilder(5);
643 		if (minutes < 10) { sb.append('0'); }
644 		sb.append(minutes).append(':');
645 		if (seconds < 10) { sb.append('0'); }
646 		sb.append(seconds);
647 		return sb.toString();
648 	}
649 	
650     private interface SortingTableModel<E> extends TableModel {
651     	int sortColumn();
652     	void sortColumn(int column);
653     	boolean sortDescending();
654     	void sortDescending(boolean flag);
655     	void sort(Comparator<E> comparator);
656     }
657     
658     private TableModel tableModelFrom(final List<Match> items) {
659     	
660     	TableModel model = new SortingTableModel<Match>() {
661     		
662     		private int sortColumn;
663     		private boolean sortDescending;
664     		
665     		 public Object getValueAt(int rowIndex, int columnIndex) {
666     			Match match = items.get(rowIndex);
667     			switch (columnIndex) {
668     				case 0: return match.getLabel();
669     				case 2: return Integer.toString(match.getLineCount());
670     				case 1: return match.getMarkCount() > 2 ? Integer.toString(match.getMarkCount()) : "";
671     				case 99: return match;
672     				default: return "";
673     				}
674     		 	}
675 			public int getColumnCount() { return matchColumns.length;	}
676 			public int getRowCount() {	return items.size(); }
677 			public boolean isCellEditable(int rowIndex, int columnIndex) {	return false;	}
678 			public Class<?> getColumnClass(int columnIndex) { return Object.class;	}
679 			public void setValueAt(Object aValue, int rowIndex, int columnIndex) {	}
680 			public String getColumnName(int i) {	return matchColumns[i].label();	}
681 			public void addTableModelListener(TableModelListener l) { }
682 			public void removeTableModelListener(TableModelListener l) { }
683 			public int sortColumn() { return sortColumn; };
684 			public void sortColumn(int column) { sortColumn = column; };
685 			public boolean sortDescending() { return sortDescending; };
686 			public void sortDescending(boolean flag) { sortDescending = flag; };
687 			public void sort(Comparator<Match> comparator) { 
688 				Collections.sort(items, comparator);
689 				if (sortDescending) {
690 				    Collections.reverse(items);
691 				}
692 				}
693     		};
694     	
695     	return model;
696     }    
697         
698     private void sortOnColumn(int columnIndex) {
699     	Comparator<Match> comparator = matchColumns[columnIndex].sorter();
700     	SortingTableModel<Match> model = (SortingTableModel<Match>)resultsTable.getModel();
701     	if (model.sortColumn() == columnIndex) {
702     		model.sortDescending(!model.sortDescending());
703     	}
704     	model.sortColumn(columnIndex);
705     	model.sort(comparator);
706     	
707     	resultsTable.getSelectionModel().clearSelection();    	
708     	resultsTable.repaint();
709     }
710     
711     private void setListDataFrom(Iterator iter) {
712 
713     	resultsTable.setModel(tableModelFrom(matches));
714     	
715     	TableColumnModel colModel = resultsTable.getColumnModel();
716     	TableColumn column;
717     	int width;
718     	
719     	for (int i=0; i<matchColumns.length; i++) {
720     		if (matchColumns[i].width() > 0) {
721     			column = colModel.getColumn(i);
722     			width = matchColumns[i].width();
723     			column.setPreferredWidth(width);
724     			column.setMinWidth(width);
725     			column.setMaxWidth(width);
726     		}
727     	}    	
728     }
729     
730     // CPDListener
731     public void phaseUpdate(int phase) {
732         phaseLabel.setText(getPhaseText(phase));
733     }
734 
735     public String getPhaseText(int phase) {
736         switch (phase) {
737             case CPDListener.INIT:
738                 return "Initializing";
739             case CPDListener.HASH:
740                 return "Hashing";
741             case CPDListener.MATCH:
742                 return "Matching";
743             case CPDListener.GROUPING:
744                 return "Grouping";
745             case CPDListener.DONE:
746                 return "Done";
747             default :
748                 return "Unknown";
749         }
750     }
751 
752     public void addedFile(int fileCount, File file) {
753         tokenizingFilesBar.setMaximum(fileCount);
754         tokenizingFilesBar.setValue(tokenizingFilesBar.getValue() + 1);
755     }
756     // CPDListener
757 
758     
759     public static void main(String[] args) {
760     	//this should prevent the disk not found popup
761         // System.setSecurityManager(null);
762         new GUI();
763     }
764 
765 }