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19 package org.netbeans.api.java.source.support;
20
21 import java.beans.PropertyChangeEvent  ;
22 import java.beans.PropertyChangeListener ;
23 import java.util.ArrayList ;
24 import java.util.Collection ;
25 import java.util.Collections ;
26 import java.util.HashMap ;
27 import java.util.List ;
28 import java.util.Map ;
29 import javax.swing.JEditorPane ;
30 import javax.swing.event.ChangeEvent ;
31 import javax.swing.event.ChangeListener ;
32 import javax.swing.text.Document ;
33 import javax.swing.text.JTextComponent ;
34 import org.netbeans.editor.Registry;
35 import org.openide.filesystems.FileObject;
36 import org.openide.loaders.DataObject;
37
38
42 class OpenedEditors implements ChangeListener , PropertyChangeListener {
43
44 private List <JTextComponent > visibleEditors = new ArrayList <JTextComponent >();
45 private Map <JTextComponent , FileObject> visibleEditors2Files = new HashMap <JTextComponent , FileObject>();
46 private List <ChangeListener > listeners = new ArrayList <ChangeListener >();
47
48 private static OpenedEditors DEFAULT;
49
50 private OpenedEditors() {
51 Registry.addChangeListener(this);
52 }
53
54 public static synchronized OpenedEditors getDefault() {
55 if (DEFAULT == null) {
56 DEFAULT = new OpenedEditors();
57 }
58
59 return DEFAULT;
60 }
61
62 public synchronized void addChangeListener(ChangeListener l) {
63 listeners.add(l);
64 }
65
66 public synchronized void removeChangeListener(ChangeListener l) {
67 listeners.remove(l);
68 }
69
70 private void fireChangeEvent() {
71 ChangeEvent e = new ChangeEvent (this);
72 List <ChangeListener > listenersCopy = null;
73
74 synchronized (this) {
75 listenersCopy = new ArrayList (listeners);
76 }
77
78 for (ChangeListener l : listenersCopy) {
79 l.stateChanged(e);
80 }
81 }
82
83 public synchronized List <JTextComponent > getVisibleEditors() {
84 return Collections.unmodifiableList(visibleEditors);
85 }
86
87 public synchronized Collection <FileObject> getVisibleEditorsFiles() {
88 return Collections.unmodifiableCollection(visibleEditors2Files.values());
89 }
90
91 public synchronized void stateChanged(ChangeEvent e) {
92 for (JTextComponent c : visibleEditors) {
93 c.removePropertyChangeListener(this);
94 visibleEditors2Files.remove(c);
95 }
96
97 visibleEditors.clear();
98
99 JTextComponent editor = Registry.getMostActiveComponent();
100
101 if (editor instanceof JEditorPane && "text/x-java".equals(((JEditorPane ) editor).getContentType())) {
102 visibleEditors.add(editor);
103 }
104
105 for (JTextComponent c : visibleEditors) {
106 c.addPropertyChangeListener(this);
107 visibleEditors2Files.put(c, getFileObject(c));
108 }
109
110 fireChangeEvent();
111 }
112
113 public synchronized void propertyChange(PropertyChangeEvent evt) {
114 JTextComponent c = (JTextComponent ) evt.getSource();
115 FileObject originalFile = visibleEditors2Files.get(c);
116 FileObject nueFile = getFileObject(c);
117
118 if (originalFile != nueFile) {
119 visibleEditors2Files.put(c, nueFile);
120 fireChangeEvent();
121 }
122 }
123
124 static FileObject getFileObject(JTextComponent pane) {
125 DataObject file = (DataObject) pane.getDocument().getProperty(Document.StreamDescriptionProperty);
126
127 if (file != null) {
128 return file.getPrimaryFile();
129 }
130
131 return null;
132 }
133
134 }
135 |
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