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1
11 package org.eclipse.jface.text.source;
12
13 import java.util.ArrayList  ;
14 import java.util.HashMap ;
15 import java.util.Iterator ;
16 import java.util.List ;
17 import java.util.Map ;
18
19 import org.eclipse.jface.text.BadLocationException;
20 import org.eclipse.jface.text.IDocument;
21 import org.eclipse.jface.text.Position;
22 import org.eclipse.jface.text.source.projection.AnnotationBag;
23
24
29 public class DefaultAnnotationHover implements IAnnotationHover {
30
31
34 public String getHoverInfo(ISourceViewer sourceViewer, int lineNumber) {
35 List javaAnnotations= getAnnotationsForLine(sourceViewer, lineNumber);
36 if (javaAnnotations != null) {
37
38 if (javaAnnotations.size() == 1) {
39
40 Annotation annotation= (Annotation) javaAnnotations.get(0);
42 String message= annotation.getText();
43 if (message != null && message.trim().length() > 0)
44 return formatSingleMessage(message);
45
46 } else {
47
48 List messages= new ArrayList ();
49
50 Iterator e= javaAnnotations.iterator();
51 while (e.hasNext()) {
52 Annotation annotation= (Annotation) e.next();
53 String message= annotation.getText();
54 if (message != null && message.trim().length() > 0)
55 messages.add(message.trim());
56 }
57
58 if (messages.size() == 1)
59 return formatSingleMessage((String ) messages.get(0));
60
61 if (messages.size() > 1)
62 return formatMultipleMessages(messages);
63 }
64 }
65 return null;
66 }
67
68
75 protected boolean isIncluded(Annotation annotation) {
76 return true;
77 }
78
79
89 protected String formatSingleMessage(String message) {
90 return message;
91 }
92
93
103 protected String formatMultipleMessages(List messages) {
104 StringBuffer buffer= new StringBuffer ();
105 buffer.append(JFaceTextMessages.getString("DefaultAnnotationHover.multipleMarkers"));
107 Iterator e= messages.iterator();
108 while (e.hasNext()) {
109 buffer.append('\n');
110 String listItemText= (String ) e.next();
111 buffer.append(JFaceTextMessages.getFormattedString("DefaultAnnotationHover.listItem", new String [] { listItemText })); }
113 return buffer.toString();
114 }
115
116 private boolean isRulerLine(Position position, IDocument document, int line) {
117 if (position.getOffset() > -1 && position.getLength() > -1) {
118 try {
119 return line == document.getLineOfOffset(position.getOffset());
120 } catch (BadLocationException x) {
121 }
122 }
123 return false;
124 }
125
126 private IAnnotationModel getAnnotationModel(ISourceViewer viewer) {
127 if (viewer instanceof ISourceViewerExtension2) {
128 ISourceViewerExtension2 extension= (ISourceViewerExtension2) viewer;
129 return extension.getVisualAnnotationModel();
130 }
131 return viewer.getAnnotationModel();
132 }
133
134 private boolean isDuplicateAnnotation(Map messagesAtPosition, Position position, String message) {
135 if (messagesAtPosition.containsKey(position)) {
136 Object value= messagesAtPosition.get(position);
137 if (message.equals(value))
138 return true;
139
140 if (value instanceof List ) {
141 List messages= (List )value;
142 if (messages.contains(message))
143 return true;
144
145 messages.add(message);
146 } else {
147 ArrayList messages= new ArrayList ();
148 messages.add(value);
149 messages.add(message);
150 messagesAtPosition.put(position, messages);
151 }
152 } else
153 messagesAtPosition.put(position, message);
154 return false;
155 }
156
157 private boolean includeAnnotation(Annotation annotation, Position position, HashMap messagesAtPosition) {
158 if (!isIncluded(annotation))
159 return false;
160
161 String text= annotation.getText();
162 return (text != null && !isDuplicateAnnotation(messagesAtPosition, position, text));
163 }
164
165 private List getAnnotationsForLine(ISourceViewer viewer, int line) {
166 IAnnotationModel model= getAnnotationModel(viewer);
167 if (model == null)
168 return null;
169
170 IDocument document= viewer.getDocument();
171 List javaAnnotations= new ArrayList ();
172 HashMap messagesAtPosition= new HashMap ();
173 Iterator iterator= model.getAnnotationIterator();
174
175 while (iterator.hasNext()) {
176 Annotation annotation= (Annotation) iterator.next();
177
178 Position position= model.getPosition(annotation);
179 if (position == null)
180 continue;
181
182 if (!isRulerLine(position, document, line))
183 continue;
184
185 if (annotation instanceof AnnotationBag) {
186 AnnotationBag bag= (AnnotationBag) annotation;
187 Iterator e= bag.iterator();
188 while (e.hasNext()) {
189 annotation= (Annotation) e.next();
190 position= model.getPosition(annotation);
191 if (position != null && includeAnnotation(annotation, position, messagesAtPosition))
192 javaAnnotations.add(annotation);
193 }
194 continue;
195 }
196
197 if (includeAnnotation(annotation, position, messagesAtPosition))
198 javaAnnotations.add(annotation);
199 }
200
201 return javaAnnotations;
202 }
203 }
204 |
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