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1
11 package org.eclipse.jdt.internal.ui.text.correction;
12
13 import java.util.Arrays  ;
14 import java.util.Comparator ;
15
16 import org.eclipse.swt.SWT;
17 import org.eclipse.swt.events.VerifyEvent;
18 import org.eclipse.swt.graphics.Image;
19 import org.eclipse.swt.graphics.Point;
20
21 import org.eclipse.jface.text.BadLocationException;
22 import org.eclipse.jface.text.DocumentEvent;
23 import org.eclipse.jface.text.IDocument;
24 import org.eclipse.jface.text.IRegion;
25 import org.eclipse.jface.text.ITextViewer;
26 import org.eclipse.jface.text.contentassist.ICompletionProposalExtension2;
27 import org.eclipse.jface.text.contentassist.IContextInformation;
28 import org.eclipse.jface.text.link.LinkedModeModel;
29 import org.eclipse.jface.text.link.LinkedModeUI;
30 import org.eclipse.jface.text.link.LinkedPosition;
31 import org.eclipse.jface.text.link.LinkedPositionGroup;
32 import org.eclipse.jface.text.link.LinkedModeUI.ExitFlags;
33 import org.eclipse.jface.text.link.LinkedModeUI.IExitPolicy;
34
35 import org.eclipse.ui.IEditorPart;
36 import org.eclipse.ui.texteditor.link.EditorLinkedModeUI;
37
38 import org.eclipse.jdt.core.ICompilationUnit;
39 import org.eclipse.jdt.core.dom.ASTNode;
40 import org.eclipse.jdt.core.dom.CompilationUnit;
41 import org.eclipse.jdt.core.dom.SimpleName;
42
43 import org.eclipse.jdt.internal.corext.dom.LinkedNodeFinder;
44 import org.eclipse.jdt.internal.corext.dom.NodeFinder;
45 import org.eclipse.jdt.internal.corext.util.Messages;
46
47 import org.eclipse.jdt.ui.text.java.IJavaCompletionProposal;
48
49 import org.eclipse.jdt.internal.ui.JavaPlugin;
50 import org.eclipse.jdt.internal.ui.JavaPluginImages;
51 import org.eclipse.jdt.internal.ui.javaeditor.ASTProvider;
52 import org.eclipse.jdt.internal.ui.javaeditor.EditorHighlightingSynchronizer;
53 import org.eclipse.jdt.internal.ui.javaeditor.JavaEditor;
54
55
58 public class LinkedNamesAssistProposal implements IJavaCompletionProposal, ICompletionProposalExtension2, ICommandAccess {
59
60
66 public static class DeleteBlockingExitPolicy implements IExitPolicy {
67 private IDocument fDocument;
68
69 public DeleteBlockingExitPolicy(IDocument document) {
70 fDocument= document;
71 }
72
73 public ExitFlags doExit(LinkedModeModel model, VerifyEvent event, int offset, int length) {
74 if (length == 0 && (event.character == SWT.BS || event.character == SWT.DEL)) {
75 LinkedPosition position= model.findPosition(new LinkedPosition(fDocument, offset, 0, LinkedPositionGroup.NO_STOP));
76 if (position != null) {
77 if (event.character == SWT.BS) {
78 if (offset - 1 < position.getOffset()) {
79 event.doit= false;
81 }
82 } else {
83 if (offset + 1 > position.getOffset() + position.getLength()) {
84 event.doit= false;
86 }
87 }
88 }
89 }
90
91 return null; }
93 }
94
95
96 public static final String ASSIST_ID= "org.eclipse.jdt.ui.correction.renameInFile.assist";
98 private SimpleName fNode;
99 private ICompilationUnit fCompilationUnit;
100 private String fLabel;
101 private String fValueSuggestion;
102 private int fRelevance;
103
104 public LinkedNamesAssistProposal(ICompilationUnit cu, SimpleName node) {
105 this(CorrectionMessages.LinkedNamesAssistProposal_description, cu, node, null);
106 fNode= node;
107 fCompilationUnit= cu;
108 fRelevance= 8;
109 }
110
111 public LinkedNamesAssistProposal(String label, ICompilationUnit cu, SimpleName node, String valueSuggestion) {
112 fLabel= label;
113 fNode= node;
114 fCompilationUnit= cu;
115 fValueSuggestion= valueSuggestion;
116 fRelevance= 8;
117 }
118
119
122 public void apply(ITextViewer viewer, char trigger, int stateMask, int offset) {
123 try {
124 Point seletion= viewer.getSelectedRange();
125
126 CompilationUnit root= JavaPlugin.getDefault().getASTProvider().getAST(fCompilationUnit, ASTProvider.WAIT_YES, null);
128
129 ASTNode nameNode= NodeFinder.perform(root, fNode.getStartPosition(), fNode.getLength());
130 final int pos= fNode.getStartPosition();
131
132 ASTNode[] sameNodes;
133 if (nameNode instanceof SimpleName) {
134 sameNodes= LinkedNodeFinder.findByNode(root, (SimpleName) nameNode);
135 } else {
136 sameNodes= new ASTNode[] { nameNode };
137 }
138
139 Arrays.sort(sameNodes, new Comparator () {
141
142 public int compare(Object o1, Object o2) {
143 return rank((ASTNode) o1) - rank((ASTNode) o2);
144 }
145
146
153 private int rank(ASTNode node) {
154 int relativeRank= node.getStartPosition() + node.getLength() - pos;
155 if (relativeRank < 0)
156 return Integer.MAX_VALUE + relativeRank;
157 else
158 return relativeRank;
159 }
160
161 });
162
163 IDocument document= viewer.getDocument();
164 LinkedPositionGroup group= new LinkedPositionGroup();
165 for (int i= 0; i < sameNodes.length; i++) {
166 ASTNode elem= sameNodes[i];
167 group.addPosition(new LinkedPosition(document, elem.getStartPosition(), elem.getLength(), i));
168 }
169
170 LinkedModeModel model= new LinkedModeModel();
171 model.addGroup(group);
172 model.forceInstall();
173 JavaEditor editor= getJavaEditor();
174 if (editor != null) {
175 model.addLinkingListener(new EditorHighlightingSynchronizer(editor));
176 }
177
178 LinkedModeUI ui= new EditorLinkedModeUI(model, viewer);
179 ui.setExitPolicy(new DeleteBlockingExitPolicy(document));
180 ui.setExitPosition(viewer, offset, 0, LinkedPositionGroup.NO_STOP);
181 ui.enter();
182
183 if (fValueSuggestion != null) {
184 document.replace(nameNode.getStartPosition(), nameNode.getLength(), fValueSuggestion);
185 IRegion selectedRegion= ui.getSelectedRegion();
186 seletion= new Point(selectedRegion.getOffset(), fValueSuggestion.length());
187 }
188
189 viewer.setSelectedRange(seletion.x, seletion.y);
191 } catch (BadLocationException e) {
192 JavaPlugin.log(e);
193 }
194 }
195
196
202 private JavaEditor getJavaEditor() {
203 IEditorPart part= JavaPlugin.getActivePage().getActiveEditor();
204 if (part instanceof JavaEditor)
205 return (JavaEditor) part;
206 else
207 return null;
208 }
209
210
213 public void apply(IDocument document) {
214 }
216
217
220 public Point getSelection(IDocument document) {
221 return null;
222 }
223
224
227 public String getAdditionalProposalInfo() {
228 return CorrectionMessages.LinkedNamesAssistProposal_proposalinfo;
229 }
230
231
234 public String getDisplayString() {
235 String shortCutString= CorrectionCommandHandler.getShortCutString(getCommandId());
236 if (shortCutString != null) {
237 return Messages.format(CorrectionMessages.ChangeCorrectionProposal_name_with_shortcut, new String [] { fLabel, shortCutString });
238 }
239 return fLabel;
240 }
241
242
245 public Image getImage() {
246 return JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_LINKED_RENAME);
247 }
248
249
252 public IContextInformation getContextInformation() {
253 return null;
254 }
255
256
259 public int getRelevance() {
260 return fRelevance;
261 }
262
263
264
267 public void selected(ITextViewer textViewer, boolean smartToggle) {
268 }
269
270
273 public void unselected(ITextViewer textViewer) {
274 }
275
276
279 public boolean validate(IDocument document, int offset, DocumentEvent event) {
280 return false;
281 }
282
283
286 public String getCommandId() {
287 return ASSIST_ID;
288 }
289
290 public void setRelevance(int relevance) {
291 fRelevance= relevance;
292 }
293
294 }
295 |
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