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1
19 package org.netbeans.modules.localhistory.ui.view;
20
21 import java.awt.BorderLayout  ;
22 import java.awt.Component ;
23 import java.awt.event.ActionEvent ;
24 import java.awt.event.ActionListener ;
25 import java.beans.PropertyChangeEvent ;
26 import java.beans.PropertyChangeListener ;
27 import java.io.*;
28 import javax.swing.JPanel ;
29 import javax.swing.SwingUtilities ;
30 import org.netbeans.api.diff.Diff;
31 import org.netbeans.api.diff.DiffView;
32 import org.netbeans.api.diff.StreamSource;
33 import org.netbeans.api.diff.Difference;
34 import org.netbeans.modules.localhistory.store.StoreEntry;
35 import org.netbeans.modules.versioning.util.NoContentPanel;
36 import org.openide.ErrorManager;
37 import org.openide.filesystems.FileObject;
38 import org.openide.filesystems.FileUtil;
39 import org.openide.explorer.ExplorerManager;
40 import org.openide.nodes.Node;
41 import org.openide.util.NbBundle;
42 import org.openide.util.RequestProcessor;
43 import org.openide.util.Lookup;
44 import org.openide.util.lookup.Lookups;
45
46
50 public class LocalHistoryDiffView implements PropertyChangeListener , ActionListener {
51
52 private DiffPanel panel;
53 private Component diffComponent;
54 private DiffView diffView;
55
56
57 public LocalHistoryDiffView() {
58 panel = new DiffPanel();
59 panel.nextButton.addActionListener(this);
60 panel.prevButton.addActionListener(this);
61 showNoContent(NbBundle.getMessage(LocalHistoryDiffView.class, "MSG_DiffPanel_NoVersion"));
62 }
63
64 public void propertyChange(PropertyChangeEvent evt) {
65 if(ExplorerManager.PROP_SELECTED_NODES.equals(evt.getPropertyName())) {
66 selectionChanged(evt);
67 }
68 }
69
70 JPanel getPanel() {
71 return panel;
72 }
73
74 private void selectionChanged(PropertyChangeEvent evt) {
75 Node[] newSelection = ((Node[]) evt.getNewValue());
76 if(newSelection == null || newSelection.length == 0) {
77 return;
78 }
79
80 StoreEntry se = newSelection[0].getLookup().lookup(StoreEntry.class);
81
82 if( se == null ) {
83 showNoContent(NbBundle.getMessage(LocalHistoryDiffView.class, "MSG_DiffPanel_IllegalSelection"));
84 return;
85 }
86 refreshDiffPanel(se);
87 }
88
89 private void refreshDiffPanel(StoreEntry se) {
90 DiffPrepareTask prepareTask = new DiffPrepareTask(se);
91 RequestProcessor.Task task = RequestProcessor.getDefault().create(prepareTask);
92 task.schedule(0);
93 }
94
95 private class DiffPrepareTask implements Runnable {
96
97 private final StoreEntry entry;
98
99 public DiffPrepareTask(final StoreEntry se) {
100 entry = se;
101 }
102
103 public void run() {
104 final Diff diff = Diff.getDefault();
105
106
108 SwingUtilities.invokeLater(new Runnable () {
109 public void run() {
110 try {
111
112 StreamSource ss1 = StreamSource.createSource("historyfile", entry.getFile().getName() + " " + StoreEntryNode.getFormatedDate(entry), entry.getMIMEType(), new InputStreamReader(entry.getStoreFileInputStream()));
113
114 String title;
115 StreamSource ss2;
116 File file = entry.getFile();
117 if(file.exists()) {
118 title = NbBundle.getMessage(LocalHistoryDiffView.class, "LBL_Diff_CurrentFile");
119 ss2 = new LHStreamSource(file, title, entry.getMIMEType());
120 } else {
121 title = NbBundle.getMessage(LocalHistoryDiffView.class, "LBL_Diff_FileDeleted");
122 ss2 = StreamSource.createSource("currentfile", title, entry.getMIMEType(), new StringReader(""));
123 }
124
125 diffView = diff.createDiff(ss1, ss2);
126
127 setDiffComponent(diffView.getComponent());
128 if(diffView.getDifferenceCount() > 0) {
129 setCurrentDifference(0);
130 } else {
131 refreshNavigationButtons();
132 }
133 panel.revalidate();
134 panel.repaint();
135
136 } catch (IOException ioe) {
137 ErrorManager.getDefault().notify(ioe);
138 }
139 }
140 });
141 }
142 }
143
144 private void showNoContent(String s) {
145 setDiffComponent(new NoContentPanel(s));
146 }
147
148 private void setDiffComponent(Component component) {
149 if(diffComponent != null) {
151 panel.diffPanel.remove(diffComponent);
152 }
153 panel.diffPanel.add(component, BorderLayout.CENTER);
154 diffComponent = component;
155 panel.diffPanel.revalidate();
156 panel.diffPanel.repaint();
157 }
159
160 public void actionPerformed(ActionEvent evt) {
161 if(evt.getSource() == panel.nextButton) {
162 onNextButton();
163 } else if(evt.getSource() == panel.prevButton) {
164 onPrevButton();
165 }
166 }
167
168 private void onNextButton() {
169 if(diffView == null) {
170 return;
171 }
172 int nextDiffernce = diffView.getCurrentDifference() + 1;
173 if(nextDiffernce < diffView.getDifferenceCount()) {
174 setCurrentDifference(nextDiffernce);
175 }
176 }
177
178 private void onPrevButton() {
179 if(diffView == null) {
180 return;
181 }
182 int prevDiffernce = diffView.getCurrentDifference() - 1;
183 if(prevDiffernce > -1) {
184 setCurrentDifference(prevDiffernce);
185 }
186 }
187
188 private void setCurrentDifference(int idx) {
189 diffView.setCurrentDifference(idx);
190 refreshNavigationButtons();
191 }
192
193 private void refreshNavigationButtons() {
194 int currentDifference = diffView.getCurrentDifference();
195 panel.prevButton.setEnabled(currentDifference > 0);
196 panel.nextButton.setEnabled(currentDifference < diffView.getDifferenceCount() - 1);
197 }
198
199 private class LHStreamSource extends StreamSource {
200
201 private final File file;
202 private final String title;
203 private final String mimeType;
204
205 public LHStreamSource(File file, String title, String mimeType) {
206 this.file = file;
207 this.title = title;
208 this.mimeType = mimeType;
209 }
210
211 public boolean isEditable() {
212 return true;
213 }
214
215 public Lookup getLookup() {
216 FileObject fo = FileUtil.toFileObject(file);
217 if (fo != null) {
218 return Lookups.fixed(fo);
219 } else {
220 return Lookups.fixed();
221 }
222 }
223
224 public String getName() {
225 return title;
226 }
227
228 public String getTitle() {
229 return title;
230 }
231
232 public String getMIMEType() {
233 return mimeType;
234 }
235
236 public Reader createReader() throws IOException {
237 return new FileReader(file);
238 }
239
240 public Writer createWriter(Difference[] conflicts) throws IOException {
241 return null;
242 }
243 }
244 }
245 |
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