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1
11 package org.eclipse.jface.text.source.projection;
12
13
14 import java.util.Iterator  ;
15
16 import org.eclipse.swt.SWT;
17 import org.eclipse.swt.events.MouseEvent;
18 import org.eclipse.swt.events.MouseMoveListener;
19 import org.eclipse.swt.events.MouseTrackAdapter;
20 import org.eclipse.swt.graphics.Color;
21 import org.eclipse.swt.widgets.Composite;
22 import org.eclipse.swt.widgets.Control;
23 import org.eclipse.swt.widgets.Display;
24
25 import org.eclipse.jface.text.BadLocationException;
26 import org.eclipse.jface.text.IDocument;
27 import org.eclipse.jface.text.Position;
28 import org.eclipse.jface.text.source.AnnotationRulerColumn;
29 import org.eclipse.jface.text.source.CompositeRuler;
30 import org.eclipse.jface.text.source.IAnnotationAccess;
31 import org.eclipse.jface.text.source.IAnnotationModel;
32 import org.eclipse.jface.text.source.IAnnotationModelExtension;
33
34
35
41 class ProjectionRulerColumn extends AnnotationRulerColumn {
42
43 private ProjectionAnnotation fCurrentAnnotation;
44
45
52 public ProjectionRulerColumn(IAnnotationModel model, int width, IAnnotationAccess annotationAccess) {
53 super(model, width, annotationAccess);
54 }
55
56
62 public ProjectionRulerColumn(int width, IAnnotationAccess annotationAccess) {
63 super(width, annotationAccess);
64 }
65
66
69 protected void mouseClicked(int line) {
70 clearCurrentAnnotation();
71 ProjectionAnnotation annotation= findAnnotation(line, true);
72 if (annotation != null) {
73 ProjectionAnnotationModel model= (ProjectionAnnotationModel) getModel();
74 model.toggleExpansionState(annotation);
75 }
76 }
77
78
86 private ProjectionAnnotation findAnnotation(int line, boolean exact) {
87
88 ProjectionAnnotation previousAnnotation= null;
89
90 IAnnotationModel model= getModel();
91 if (model != null) {
92 IDocument document= getCachedTextViewer().getDocument();
93
94 int previousDistance= Integer.MAX_VALUE;
95
96 Iterator e= model.getAnnotationIterator();
97 while (e.hasNext()) {
98 Object next= e.next();
99 if (next instanceof ProjectionAnnotation) {
100 ProjectionAnnotation annotation= (ProjectionAnnotation) next;
101 Position p= model.getPosition(annotation);
102 if (p == null)
103 continue;
104
105 int distance= getDistance(annotation, p, document, line);
106 if (distance == -1)
107 continue;
108
109 if (!exact) {
110 if (distance < previousDistance) {
111 previousAnnotation= annotation;
112 previousDistance= distance;
113 }
114 } else if (distance == 0) {
115 previousAnnotation= annotation;
116 }
117 }
118 }
119 }
120
121 return previousAnnotation;
122 }
123
124
134 private int getDistance(ProjectionAnnotation annotation, Position position, IDocument document, int line) {
135 if (position.getOffset() > -1 && position.getLength() > -1) {
136 try {
137 int startLine= document.getLineOfOffset(position.getOffset());
138 int endLine= document.getLineOfOffset(position.getOffset() + position.getLength());
139 if (startLine <= line && line < endLine) {
140 if (annotation.isCollapsed()) {
141 int captionOffset;
142 if (position instanceof IProjectionPosition)
143 captionOffset= ((IProjectionPosition) position).computeCaptionOffset(document);
144 else
145 captionOffset= 0;
146
147 int captionLine= document.getLineOfOffset(position.getOffset() + captionOffset);
148 if (startLine <= captionLine && captionLine < endLine)
149 return Math.abs(line - captionLine);
150 }
151 return line - startLine;
152 }
153 } catch (BadLocationException x) {
154 }
155 }
156 return -1;
157 }
158
159 private boolean clearCurrentAnnotation() {
160 if (fCurrentAnnotation != null) {
161 fCurrentAnnotation.setRangeIndication(false);
162 fCurrentAnnotation= null;
163 return true;
164 }
165 return false;
166 }
167
168
171 public Control createControl(CompositeRuler parentRuler, Composite parentControl) {
172 Control control= super.createControl(parentRuler, parentControl);
173
174 Display display= parentControl.getDisplay();
176 Color background= display.getSystemColor(SWT.COLOR_LIST_BACKGROUND);
177 control.setBackground(background);
178
179 control.addMouseTrackListener(new MouseTrackAdapter() {
181 public void mouseExit(MouseEvent e) {
182 if (clearCurrentAnnotation())
183 redraw();
184 }
185 });
186
187 control.addMouseMoveListener(new MouseMoveListener() {
189 public void mouseMove(MouseEvent e) {
190 boolean redraw= false;
191 ProjectionAnnotation annotation= findAnnotation(toDocumentLineNumber(e.y), false);
192 if (annotation != fCurrentAnnotation) {
193 if (fCurrentAnnotation != null) {
194 fCurrentAnnotation.setRangeIndication(false);
195 redraw= true;
196 }
197 fCurrentAnnotation= annotation;
198 if (fCurrentAnnotation != null && !fCurrentAnnotation.isCollapsed()) {
199 fCurrentAnnotation.setRangeIndication(true);
200 redraw= true;
201 }
202 }
203 if (redraw)
204 redraw();
205 }
206 });
207 return control;
208 }
209
210
213 public void setModel(IAnnotationModel model) {
214 if (model instanceof IAnnotationModelExtension) {
215 IAnnotationModelExtension extension= (IAnnotationModelExtension) model;
216 model= extension.getAnnotationModel(ProjectionSupport.PROJECTION);
217 }
218 super.setModel(model);
219 }
220
221
224 protected boolean isPropagatingMouseListener() {
225 return false;
226 }
227
228
231 protected boolean hasAnnotation(int lineNumber) {
232 return findAnnotation(lineNumber, true) != null;
233 }
234 }
235 |
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