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1
33
34 package edu.rice.cs.drjava.ui;
35
36 import java.util.Vector  ;
37 import java.util.ArrayList ;
38 import java.util.Enumeration ;
39
40 import javax.swing.*;
41 import javax.swing.event.*;
42 import javax.swing.tree.*;
43 import javax.swing.table.*;
44 import javax.swing.text.BadLocationException ;
45 import java.awt.event.*;
46 import java.awt.*;
47 import javax.swing.text.BadLocationException ;
48 import javax.swing.text.Position ;
49
50 import edu.rice.cs.drjava.model.RegionManager;
51 import edu.rice.cs.drjava.model.RegionManagerListener;
52 import edu.rice.cs.drjava.model.DocumentRegion;
53 import edu.rice.cs.drjava.model.OpenDefinitionsDocument;
54 import edu.rice.cs.drjava.config.*;
55 import edu.rice.cs.util.swing.Utilities;
56 import edu.rice.cs.util.UnexpectedException;
57
58
64 public class BrowserHistoryPanel extends RegionsListPanel<DocumentRegion> {
65 protected JButton _backButton;
66 protected JButton _forwardButton;
67 protected JButton _goToButton;
68 protected JButton _removeButton;
69 protected JButton _removeAllButton;
70 protected AbstractAction _backAction;
71 protected AbstractAction _forwardAction;
72
73
77 public BrowserHistoryPanel(MainFrame frame) {
78 super(frame, "Browser History");
79 _model.getBrowserHistoryManager().addListener(new RegionManagerListener<DocumentRegion>() {
80 public void regionAdded(DocumentRegion r, int index) {
81 addRegion(r, index);
82 _list.ensureIndexIsVisible(index);
83 }
84 public void regionChanged(DocumentRegion r, int index) {
85 regionRemoved(r);
86 regionAdded(r, index);
87 }
88 public void regionRemoved(DocumentRegion r) {
89 removeRegion(r);
90 }
91 });
92 }
93
94
95 protected void performDefaultAction() {
96 goToRegion();
97 }
98
99
100 protected void goToRegion() {
101 ArrayList <DocumentRegion> r = getSelectedRegions();
102 if (r.size() == 1) {
103 _model.getBrowserHistoryManager().setCurrentRegion(r.get(0));
104 updateButtons();
105 RegionListUserObj<DocumentRegion> userObj = getUserObjForRegion(r.get(0));
106 if (userObj!=null) { _list.ensureIndexIsVisible(_listModel.indexOf(userObj)); }
107 _frame.scrollToDocumentAndOffset(r.get(0).getDocument(), r.get(0).getStartOffset(), false, false);
108 }
109 }
110
111
112 protected void backRegion() {
113 RegionManager rm = _model.getBrowserHistoryManager();
114
115 _frame.addToBrowserHistory();
117
118 DocumentRegion r = rm.prevCurrentRegion();
120 updateButtons();
121 RegionListUserObj<DocumentRegion> userObj = getUserObjForRegion(r);
122 if (userObj!=null) { _list.ensureIndexIsVisible(_listModel.indexOf(userObj)); }
123 _frame.scrollToDocumentAndOffset(r.getDocument(), r.getStartOffset(), false, false);
124 }
125
126
127 protected void forwardRegion() {
128 RegionManager rm = _model.getBrowserHistoryManager();
129
130 _frame.addToBrowserHistory();
132
133 DocumentRegion r = rm.nextCurrentRegion();
135 updateButtons();
136 RegionListUserObj<DocumentRegion> userObj = getUserObjForRegion(r);
137 if (userObj!=null) { _list.ensureIndexIsVisible(_listModel.indexOf(userObj)); }
138 _frame.scrollToDocumentAndOffset(r.getDocument(), r.getStartOffset(), false, false);
139 }
140
141
142 AbstractAction getBackAction() {
143 return _backAction;
144 }
145
146
147 AbstractAction getForwardAction() {
148 return _forwardAction;
149 }
150
151
152 protected JComponent[] makeButtons() {
153 _backAction = new AbstractAction("Back") {
154 public void actionPerformed(ActionEvent ae) {
155 backRegion();
156 }
157 };
158 _backButton = new JButton(_backAction);
159
160 _forwardAction = new AbstractAction("Forward") {
161 public void actionPerformed(ActionEvent ae) {
162 forwardRegion();
163 }
164 };
165 _forwardButton = new JButton(_forwardAction);
166
167 Action goToAction = new AbstractAction("Go to") {
168 public void actionPerformed(ActionEvent ae) {
169 goToRegion();
170 }
171 };
172 _goToButton = new JButton(goToAction);
173
174 Action removeAction = new AbstractAction("Remove") {
175 public void actionPerformed(ActionEvent ae) {
176 for (DocumentRegion r: getSelectedRegions()) {
177 _model.getBrowserHistoryManager().removeRegion(r);
178 }
179 }
180 };
181 _removeButton = new JButton(removeAction);
182
183 Action removeAllAction = new AbstractAction("Remove All") {
184 public void actionPerformed(ActionEvent ae) {
185 _model.getBrowserHistoryManager().clearRegions();
186 }
187 };
188 _removeAllButton = new JButton(removeAllAction);
189
190 JComponent[] buts = new JComponent[] {
191 _backButton,
192 _forwardButton,
193 _goToButton,
194 _removeButton,
195 _removeAllButton
196 };
197
198 return buts;
199 }
200
201
202 protected void updateButtons() {
203 ArrayList <DocumentRegion> regs = getSelectedRegions();
204 _goToButton.setEnabled(regs.size()==1);
205 _removeButton.setEnabled(regs.size()>0);
206 _removeAllButton.setEnabled(_listModel.size()>0);
207 _backAction.setEnabled((_listModel.size()>0) && (!_model.getBrowserHistoryManager().isCurrentRegionFirst()));
208 _forwardAction.setEnabled((_listModel.size()>0) && (!_model.getBrowserHistoryManager().isCurrentRegionLast()));
209 }
210
211
212 protected AbstractAction[] makePopupMenuActions() {
213 AbstractAction[] acts = new AbstractAction[] {
214 new AbstractAction("Go to") {
215 public void actionPerformed(ActionEvent e) {
216 goToRegion();
217 }
218 },
219
220 new AbstractAction("Remove") {
221 public void actionPerformed(ActionEvent e) {
222 for (DocumentRegion r: getSelectedRegions()) {
223 _model.getBrowserHistoryManager().removeRegion(r);
224 }
225 }
226 }
227 };
228 return acts;
229 }
230
231
232 protected RegionListUserObj<DocumentRegion> getUserObjForRegion(DocumentRegion r) {
233 for(int i=0; i<_listModel.size(); ++i) {
234 @SuppressWarnings ("unchecked") RegionListUserObj<DocumentRegion> userObj = (RegionListUserObj<DocumentRegion>)_listModel.get(i);
235 if (userObj.region()==r) {
236 return userObj;
237 }
238 }
239 return null;
240 }
241
242
244 protected RegionListUserObj<DocumentRegion> makeRegionListUserObj(DocumentRegion r) {
245 return new BrowserHistoryListUserObj(r);
246 }
247
248
249 protected class BrowserHistoryListUserObj extends RegionListUserObj<DocumentRegion> {
250 public BrowserHistoryListUserObj(DocumentRegion r) { super(r); }
251 public String toString() {
252 final StringBuilder sb = new StringBuilder ();
253 _region.getDocument().acquireReadLock();
254 try {
255 sb.append("<html>");
256 if (_region==_model.getBrowserHistoryManager().getCurrentRegion()) {
257 sb.append("<font color=\"red\">");
258 }
259 sb.append(_region.getDocument().toString());
260 sb.append(':');
261 sb.append(lineNumber());
262 try {
263 sb.append(": ");
264 int length = Math.min(120, _region.getEndOffset()-_region.getStartOffset());
265 sb.append(_region.getDocument().getText(_region.getStartOffset(), length).trim());
266 } catch(BadLocationException bpe) { }
267 if (_region.equals(_model.getBrowserHistoryManager().getCurrentRegion())) {
268 sb.append("</font>");
269 }
270 sb.append("</html>");
271 } finally { _region.getDocument().releaseReadLock(); }
272 return sb.toString();
273 }
274 public boolean equals(Object other) {
275 @SuppressWarnings ("unchecked") BrowserHistoryListUserObj o = (BrowserHistoryListUserObj)other;
276 return (o.region().getDocument().equals(region().getDocument())) &&
277 (o.region().getStartOffset()==region().getStartOffset()) &&
278 (o.region().getEndOffset()==region().getEndOffset());
279 }
280 }
281 }
282 |
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