Mercurial > projects > dwt-addons
annotate dwtx/jface/text/WhitespaceCharacterPainter.d @ 162:1a5b8f8129df
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author | Frank Benoit <benoit@tionex.de> |
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date | Mon, 08 Sep 2008 00:51:37 +0200 |
parents | 000f9136b8f7 |
children |
rev | line source |
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129 | 1 /******************************************************************************* |
2 * Copyright (c) 2006, 2007 Wind River Systems, Inc. and others. | |
3 * All rights reserved. This program and the accompanying materials | |
4 * are made available under the terms of the Eclipse Public License v1.0 | |
5 * which accompanies this distribution, and is available at | |
6 * http://www.eclipse.org/legal/epl-v10.html | |
7 * | |
8 * Contributors: | |
9 * Anton Leherbauer (Wind River Systems) - initial API and implementation - https://bugs.eclipse.org/bugs/show_bug.cgi?id=22712 | |
10 * Anton Leherbauer (Wind River Systems) - [painting] Long lines take too long to display when "Show Whitespace Characters" is enabled - https://bugs.eclipse.org/bugs/show_bug.cgi?id=196116 | |
11 * Anton Leherbauer (Wind River Systems) - [painting] Whitespace characters not drawn when scrolling to right slowly - https://bugs.eclipse.org/bugs/show_bug.cgi?id=206633 | |
12 * Port to the D programming language: | |
13 * Frank Benoit <benoit@tionex.de> | |
14 *******************************************************************************/ | |
15 module dwtx.jface.text.WhitespaceCharacterPainter; | |
16 | |
131 | 17 import dwtx.jface.text.IDocumentPartitioningListener; // packageimport |
18 import dwtx.jface.text.DefaultTextHover; // packageimport | |
19 import dwtx.jface.text.AbstractInformationControl; // packageimport | |
20 import dwtx.jface.text.TextUtilities; // packageimport | |
21 import dwtx.jface.text.IInformationControlCreatorExtension; // packageimport | |
22 import dwtx.jface.text.AbstractInformationControlManager; // packageimport | |
23 import dwtx.jface.text.ITextViewerExtension2; // packageimport | |
24 import dwtx.jface.text.IDocumentPartitioner; // packageimport | |
25 import dwtx.jface.text.DefaultIndentLineAutoEditStrategy; // packageimport | |
26 import dwtx.jface.text.ITextSelection; // packageimport | |
27 import dwtx.jface.text.Document; // packageimport | |
28 import dwtx.jface.text.FindReplaceDocumentAdapterContentProposalProvider; // packageimport | |
29 import dwtx.jface.text.ITextListener; // packageimport | |
30 import dwtx.jface.text.BadPartitioningException; // packageimport | |
31 import dwtx.jface.text.ITextViewerExtension5; // packageimport | |
32 import dwtx.jface.text.IDocumentPartitionerExtension3; // packageimport | |
33 import dwtx.jface.text.IUndoManager; // packageimport | |
34 import dwtx.jface.text.ITextHoverExtension2; // packageimport | |
35 import dwtx.jface.text.IRepairableDocument; // packageimport | |
36 import dwtx.jface.text.IRewriteTarget; // packageimport | |
37 import dwtx.jface.text.DefaultPositionUpdater; // packageimport | |
38 import dwtx.jface.text.RewriteSessionEditProcessor; // packageimport | |
39 import dwtx.jface.text.TextViewerHoverManager; // packageimport | |
40 import dwtx.jface.text.DocumentRewriteSession; // packageimport | |
41 import dwtx.jface.text.TextViewer; // packageimport | |
42 import dwtx.jface.text.ITextViewerExtension8; // packageimport | |
43 import dwtx.jface.text.RegExMessages; // packageimport | |
44 import dwtx.jface.text.IDelayedInputChangeProvider; // packageimport | |
45 import dwtx.jface.text.ITextOperationTargetExtension; // packageimport | |
46 import dwtx.jface.text.IWidgetTokenOwner; // packageimport | |
47 import dwtx.jface.text.IViewportListener; // packageimport | |
48 import dwtx.jface.text.GapTextStore; // packageimport | |
49 import dwtx.jface.text.MarkSelection; // packageimport | |
50 import dwtx.jface.text.IDocumentPartitioningListenerExtension; // packageimport | |
51 import dwtx.jface.text.IDocumentAdapterExtension; // packageimport | |
52 import dwtx.jface.text.IInformationControlExtension; // packageimport | |
53 import dwtx.jface.text.IDocumentPartitioningListenerExtension2; // packageimport | |
54 import dwtx.jface.text.DefaultDocumentAdapter; // packageimport | |
55 import dwtx.jface.text.ITextViewerExtension3; // packageimport | |
56 import dwtx.jface.text.IInformationControlCreator; // packageimport | |
57 import dwtx.jface.text.TypedRegion; // packageimport | |
58 import dwtx.jface.text.ISynchronizable; // packageimport | |
59 import dwtx.jface.text.IMarkRegionTarget; // packageimport | |
60 import dwtx.jface.text.TextViewerUndoManager; // packageimport | |
61 import dwtx.jface.text.IRegion; // packageimport | |
62 import dwtx.jface.text.IInformationControlExtension2; // packageimport | |
63 import dwtx.jface.text.IDocumentExtension4; // packageimport | |
64 import dwtx.jface.text.IDocumentExtension2; // packageimport | |
65 import dwtx.jface.text.IDocumentPartitionerExtension2; // packageimport | |
66 import dwtx.jface.text.Assert; // packageimport | |
67 import dwtx.jface.text.DefaultInformationControl; // packageimport | |
68 import dwtx.jface.text.IWidgetTokenOwnerExtension; // packageimport | |
69 import dwtx.jface.text.DocumentClone; // packageimport | |
70 import dwtx.jface.text.DefaultUndoManager; // packageimport | |
71 import dwtx.jface.text.IFindReplaceTarget; // packageimport | |
72 import dwtx.jface.text.IAutoEditStrategy; // packageimport | |
73 import dwtx.jface.text.ILineTrackerExtension; // packageimport | |
74 import dwtx.jface.text.IUndoManagerExtension; // packageimport | |
75 import dwtx.jface.text.TextSelection; // packageimport | |
76 import dwtx.jface.text.DefaultAutoIndentStrategy; // packageimport | |
77 import dwtx.jface.text.IAutoIndentStrategy; // packageimport | |
78 import dwtx.jface.text.IPainter; // packageimport | |
79 import dwtx.jface.text.IInformationControl; // packageimport | |
80 import dwtx.jface.text.IInformationControlExtension3; // packageimport | |
81 import dwtx.jface.text.ITextViewerExtension6; // packageimport | |
82 import dwtx.jface.text.IInformationControlExtension4; // packageimport | |
83 import dwtx.jface.text.DefaultLineTracker; // packageimport | |
84 import dwtx.jface.text.IDocumentInformationMappingExtension; // packageimport | |
85 import dwtx.jface.text.IRepairableDocumentExtension; // packageimport | |
86 import dwtx.jface.text.ITextHover; // packageimport | |
87 import dwtx.jface.text.FindReplaceDocumentAdapter; // packageimport | |
88 import dwtx.jface.text.ILineTracker; // packageimport | |
89 import dwtx.jface.text.Line; // packageimport | |
90 import dwtx.jface.text.ITextViewerExtension; // packageimport | |
91 import dwtx.jface.text.IDocumentAdapter; // packageimport | |
92 import dwtx.jface.text.TextEvent; // packageimport | |
93 import dwtx.jface.text.BadLocationException; // packageimport | |
94 import dwtx.jface.text.AbstractDocument; // packageimport | |
95 import dwtx.jface.text.AbstractLineTracker; // packageimport | |
96 import dwtx.jface.text.TreeLineTracker; // packageimport | |
97 import dwtx.jface.text.ITextPresentationListener; // packageimport | |
98 import dwtx.jface.text.Region; // packageimport | |
99 import dwtx.jface.text.ITextViewer; // packageimport | |
100 import dwtx.jface.text.IDocumentInformationMapping; // packageimport | |
101 import dwtx.jface.text.MarginPainter; // packageimport | |
102 import dwtx.jface.text.IPaintPositionManager; // packageimport | |
103 import dwtx.jface.text.TextPresentation; // packageimport | |
104 import dwtx.jface.text.IFindReplaceTargetExtension; // packageimport | |
105 import dwtx.jface.text.ISlaveDocumentManagerExtension; // packageimport | |
106 import dwtx.jface.text.ISelectionValidator; // packageimport | |
107 import dwtx.jface.text.IDocumentExtension; // packageimport | |
108 import dwtx.jface.text.PropagatingFontFieldEditor; // packageimport | |
109 import dwtx.jface.text.ConfigurableLineTracker; // packageimport | |
110 import dwtx.jface.text.SlaveDocumentEvent; // packageimport | |
111 import dwtx.jface.text.IDocumentListener; // packageimport | |
112 import dwtx.jface.text.PaintManager; // packageimport | |
113 import dwtx.jface.text.IFindReplaceTargetExtension3; // packageimport | |
114 import dwtx.jface.text.ITextDoubleClickStrategy; // packageimport | |
115 import dwtx.jface.text.IDocumentExtension3; // packageimport | |
116 import dwtx.jface.text.Position; // packageimport | |
117 import dwtx.jface.text.TextMessages; // packageimport | |
118 import dwtx.jface.text.CopyOnWriteTextStore; // packageimport | |
119 import dwtx.jface.text.IPositionUpdater; // packageimport | |
120 import dwtx.jface.text.DefaultTextDoubleClickStrategy; // packageimport | |
121 import dwtx.jface.text.ListLineTracker; // packageimport | |
122 import dwtx.jface.text.ITextInputListener; // packageimport | |
123 import dwtx.jface.text.BadPositionCategoryException; // packageimport | |
124 import dwtx.jface.text.IWidgetTokenKeeperExtension; // packageimport | |
125 import dwtx.jface.text.IInputChangedListener; // packageimport | |
126 import dwtx.jface.text.ITextOperationTarget; // packageimport | |
127 import dwtx.jface.text.IDocumentInformationMappingExtension2; // packageimport | |
128 import dwtx.jface.text.ITextViewerExtension7; // packageimport | |
129 import dwtx.jface.text.IInformationControlExtension5; // packageimport | |
130 import dwtx.jface.text.IDocumentRewriteSessionListener; // packageimport | |
131 import dwtx.jface.text.JFaceTextUtil; // packageimport | |
132 import dwtx.jface.text.AbstractReusableInformationControlCreator; // packageimport | |
133 import dwtx.jface.text.TabsToSpacesConverter; // packageimport | |
134 import dwtx.jface.text.CursorLinePainter; // packageimport | |
135 import dwtx.jface.text.ITextHoverExtension; // packageimport | |
136 import dwtx.jface.text.IEventConsumer; // packageimport | |
137 import dwtx.jface.text.IDocument; // packageimport | |
138 import dwtx.jface.text.IWidgetTokenKeeper; // packageimport | |
139 import dwtx.jface.text.DocumentCommand; // packageimport | |
140 import dwtx.jface.text.TypedPosition; // packageimport | |
141 import dwtx.jface.text.IEditingSupportRegistry; // packageimport | |
142 import dwtx.jface.text.IDocumentPartitionerExtension; // packageimport | |
143 import dwtx.jface.text.AbstractHoverInformationControlManager; // packageimport | |
144 import dwtx.jface.text.IEditingSupport; // packageimport | |
145 import dwtx.jface.text.IMarkSelection; // packageimport | |
146 import dwtx.jface.text.ISlaveDocumentManager; // packageimport | |
147 import dwtx.jface.text.DocumentEvent; // packageimport | |
148 import dwtx.jface.text.DocumentPartitioningChangedEvent; // packageimport | |
149 import dwtx.jface.text.ITextStore; // packageimport | |
150 import dwtx.jface.text.JFaceTextMessages; // packageimport | |
151 import dwtx.jface.text.DocumentRewriteSessionEvent; // packageimport | |
152 import dwtx.jface.text.SequentialRewriteTextStore; // packageimport | |
153 import dwtx.jface.text.DocumentRewriteSessionType; // packageimport | |
154 import dwtx.jface.text.TextAttribute; // packageimport | |
155 import dwtx.jface.text.ITextViewerExtension4; // packageimport | |
156 import dwtx.jface.text.ITypedRegion; // packageimport | |
157 | |
158 | |
129 | 159 import dwt.dwthelper.utils; |
160 | |
161 import dwt.custom.StyleRange; | |
162 import dwt.custom.StyledText; | |
163 import dwt.custom.StyledTextContent; | |
164 import dwt.events.PaintEvent; | |
165 import dwt.events.PaintListener; | |
166 import dwt.graphics.Color; | |
167 import dwt.graphics.FontMetrics; | |
168 import dwt.graphics.GC; | |
169 import dwt.graphics.Point; | |
170 | |
171 | |
172 /** | |
162 | 173 * A painter for drawing visible characters for (invisible) whitespace |
129 | 174 * characters. |
162 | 175 * |
129 | 176 * @since 3.3 |
177 */ | |
178 public class WhitespaceCharacterPainter : IPainter, PaintListener { | |
179 | |
147 | 180 private static const char SPACE_SIGN= '\u00b7'; |
181 private static const char IDEOGRAPHIC_SPACE_SIGN= '\u00b0'; | |
182 private static const char TAB_SIGN= '\u00bb'; | |
183 private static const char CARRIAGE_RETURN_SIGN= '\u00a4'; | |
184 private static const char LINE_FEED_SIGN= '\u00b6'; | |
162 | 185 |
129 | 186 /** Indicates whether this painter is active. */ |
187 private bool fIsActive= false; | |
188 /** The source viewer this painter is attached to. */ | |
189 private ITextViewer fTextViewer; | |
190 /** The viewer's widget. */ | |
191 private StyledText fTextWidget; | |
192 /** Tells whether the advanced graphics sub system is available. */ | |
193 private bool fIsAdvancedGraphicsPresent; | |
194 | |
195 /** | |
196 * Creates a new painter for the given text viewer. | |
162 | 197 * |
129 | 198 * @param textViewer the text viewer the painter should be attached to |
199 */ | |
133
7d818bd32d63
Fix ctors to this with gvim regexp
Frank Benoit <benoit@tionex.de>
parents:
131
diff
changeset
|
200 public this(ITextViewer textViewer) { |
162 | 201 // super(); |
129 | 202 fTextViewer= textViewer; |
203 fTextWidget= textViewer.getTextWidget(); | |
204 GC gc= new GC(fTextWidget); | |
205 gc.setAdvanced(true); | |
206 fIsAdvancedGraphicsPresent= gc.getAdvanced(); | |
207 gc.dispose(); | |
208 } | |
209 | |
210 /* | |
211 * @see dwtx.jface.text.IPainter#dispose() | |
212 */ | |
213 public void dispose() { | |
214 fTextViewer= null; | |
215 fTextWidget= null; | |
216 } | |
217 | |
218 /* | |
219 * @see dwtx.jface.text.IPainter#paint(int) | |
220 */ | |
221 public void paint(int reason) { | |
222 IDocument document= fTextViewer.getDocument(); | |
223 if (document is null) { | |
224 deactivate(false); | |
225 return; | |
226 } | |
227 if (!fIsActive) { | |
228 fIsActive= true; | |
229 fTextWidget.addPaintListener(this); | |
230 redrawAll(); | |
231 } else if (reason is CONFIGURATION || reason is INTERNAL) { | |
232 redrawAll(); | |
233 } else if (reason is TEXT_CHANGE) { | |
234 // redraw current line only | |
235 try { | |
236 IRegion lineRegion = | |
237 document.getLineInformationOfOffset(getDocumentOffset(fTextWidget.getCaretOffset())); | |
238 int widgetOffset= getWidgetOffset(lineRegion.getOffset()); | |
239 int charCount= fTextWidget.getCharCount(); | |
240 int redrawLength= Math.min(lineRegion.getLength(), charCount - widgetOffset); | |
241 if (widgetOffset >= 0 && redrawLength > 0) { | |
242 fTextWidget.redrawRange(widgetOffset, redrawLength, true); | |
243 } | |
244 } catch (BadLocationException e) { | |
245 // ignore | |
246 } | |
247 } | |
248 } | |
249 | |
250 /* | |
251 * @see dwtx.jface.text.IPainter#deactivate(bool) | |
252 */ | |
253 public void deactivate(bool redraw) { | |
254 if (fIsActive) { | |
255 fIsActive= false; | |
256 fTextWidget.removePaintListener(this); | |
257 if (redraw) { | |
258 redrawAll(); | |
259 } | |
260 } | |
261 } | |
262 | |
263 /* | |
264 * @see dwtx.jface.text.IPainter#setPositionManager(dwtx.jface.text.IPaintPositionManager) | |
265 */ | |
266 public void setPositionManager(IPaintPositionManager manager) { | |
267 // no need for a position manager | |
268 } | |
269 | |
270 /* | |
271 * @see dwt.events.PaintListener#paintControl(dwt.events.PaintEvent) | |
272 */ | |
273 public void paintControl(PaintEvent event) { | |
274 if (fTextWidget !is null) { | |
275 handleDrawRequest(event.gc, event.x, event.y, event.width, event.height); | |
276 } | |
277 } | |
278 | |
279 /** | |
280 * Draw characters in view range. | |
162 | 281 * |
129 | 282 * @param gc |
283 * @param x | |
284 * @param y | |
285 * @param w | |
286 * @param h | |
287 */ | |
288 private void handleDrawRequest(GC gc, int x, int y, int w, int h) { | |
289 int startLine= fTextWidget.getLineIndex(y); | |
290 int endLine= fTextWidget.getLineIndex(y + h - 1); | |
291 if (startLine <= endLine && startLine < fTextWidget.getLineCount()) { | |
292 if (fIsAdvancedGraphicsPresent) { | |
293 int alpha= gc.getAlpha(); | |
294 gc.setAlpha(100); | |
295 drawLineRange(gc, startLine, endLine, x, w); | |
296 gc.setAlpha(alpha); | |
297 } else | |
298 drawLineRange(gc, startLine, endLine, x, w); | |
299 } | |
300 } | |
301 | |
302 /** | |
303 * Draw the given line range. | |
162 | 304 * |
129 | 305 * @param gc |
306 * @param startLine first line number | |
307 * @param endLine last line number (inclusive) | |
308 * @param x the X-coordinate of the drawing range | |
309 * @param w the width of the drawing range | |
310 */ | |
311 private void drawLineRange(GC gc, int startLine, int endLine, int x, int w) { | |
312 final int viewPortWidth= fTextWidget.getClientArea().width; | |
313 for (int line= startLine; line <= endLine; line++) { | |
314 int lineOffset= fTextWidget.getOffsetAtLine(line); | |
315 // line end offset including line delimiter | |
316 int lineEndOffset; | |
317 if (line < fTextWidget.getLineCount() - 1) { | |
318 lineEndOffset= fTextWidget.getOffsetAtLine(line + 1); | |
319 } else { | |
320 lineEndOffset= fTextWidget.getCharCount(); | |
321 } | |
322 // line length excluding line delimiter | |
323 int lineLength= lineEndOffset - lineOffset; | |
324 while (lineLength > 0) { | |
325 char c= fTextWidget.getTextRange(lineOffset + lineLength - 1, 1).charAt(0); | |
326 if (c !is '\r' && c !is '\n') { | |
327 break; | |
328 } | |
329 --lineLength; | |
330 } | |
331 // compute coordinates of last character on line | |
332 Point endOfLine= fTextWidget.getLocationAtOffset(lineOffset + lineLength); | |
333 if (x - endOfLine.x > viewPortWidth) { | |
334 // line is not visible | |
335 continue; | |
336 } | |
337 // Y-coordinate of line | |
338 int y= fTextWidget.getLinePixel(line); | |
339 // compute first visible char offset | |
340 int startOffset; | |
341 try { | |
342 startOffset= fTextWidget.getOffsetAtLocation(new Point(x, y)) - 1; | |
343 if (startOffset - 2 <= lineOffset) { | |
344 startOffset= lineOffset; | |
345 } | |
346 } catch (IllegalArgumentException iae) { | |
347 startOffset= lineOffset; | |
348 } | |
349 // compute last visible char offset | |
350 int endOffset; | |
351 if (x + w >= endOfLine.x) { | |
352 // line end is visible | |
353 endOffset= lineEndOffset; | |
354 } else { | |
355 try { | |
356 endOffset= fTextWidget.getOffsetAtLocation(new Point(x + w - 1, y)) + 1; | |
357 if (endOffset + 2 >= lineEndOffset) { | |
358 endOffset= lineEndOffset; | |
359 } | |
360 } catch (IllegalArgumentException iae) { | |
361 endOffset= lineEndOffset; | |
362 } | |
363 } | |
364 // draw character range | |
365 if (endOffset > startOffset) { | |
366 drawCharRange(gc, startOffset, endOffset); | |
367 } | |
368 } | |
369 } | |
370 | |
371 /** | |
372 * Draw characters of content range. | |
162 | 373 * |
129 | 374 * @param gc the GC |
375 * @param startOffset inclusive start index | |
376 * @param endOffset exclusive end index | |
377 */ | |
378 private void drawCharRange(GC gc, int startOffset, int endOffset) { | |
379 StyledTextContent content= fTextWidget.getContent(); | |
380 int length= endOffset - startOffset; | |
381 String text= content.getTextRange(startOffset, length); | |
382 StyleRange styleRange= null; | |
383 Color fg= null; | |
384 Point selection= fTextWidget.getSelection(); | |
385 StringBuffer visibleChar= new StringBuffer(10); | |
386 for (int textOffset= 0; textOffset <= length; ++textOffset) { | |
387 int delta= 0; | |
388 bool eol= false; | |
389 if (textOffset < length) { | |
390 delta= 1; | |
391 char c= text.charAt(textOffset); | |
392 switch (c) { | |
393 case ' ' : | |
394 visibleChar.append(SPACE_SIGN); | |
395 // 'continue' would improve performance but may produce drawing errors | |
396 // for long runs of space if width of space and dot differ | |
397 break; | |
398 case '\u3000' : // ideographic whitespace | |
399 visibleChar.append(IDEOGRAPHIC_SPACE_SIGN); | |
400 // 'continue' would improve performance but may produce drawing errors | |
401 // for long runs of space if width of space and dot differ | |
402 break; | |
403 case '\t' : | |
404 visibleChar.append(TAB_SIGN); | |
405 break; | |
406 case '\r' : | |
407 visibleChar.append(CARRIAGE_RETURN_SIGN); | |
408 if (textOffset >= length - 1 || text.charAt(textOffset + 1) !is '\n') { | |
409 eol= true; | |
410 break; | |
411 } | |
412 continue; | |
413 case '\n' : | |
414 visibleChar.append(LINE_FEED_SIGN); | |
415 eol= true; | |
416 break; | |
417 default : | |
418 delta= 0; | |
419 break; | |
420 } | |
421 } | |
422 if (visibleChar.length() > 0) { | |
423 int widgetOffset= startOffset + textOffset - visibleChar.length() + delta; | |
424 if (!eol || !isFoldedLine(content.getLineAtOffset(widgetOffset))) { | |
425 if (widgetOffset >= selection.x && widgetOffset < selection.y) { | |
426 fg= fTextWidget.getSelectionForeground(); | |
427 } else if (styleRange is null || styleRange.start + styleRange.length <= widgetOffset) { | |
428 styleRange= fTextWidget.getStyleRangeAtOffset(widgetOffset); | |
429 if (styleRange is null || styleRange.foreground is null) { | |
430 fg= fTextWidget.getForeground(); | |
431 } else { | |
432 fg= styleRange.foreground; | |
433 } | |
434 } | |
435 draw(gc, widgetOffset, visibleChar.toString(), fg); | |
436 } | |
162 | 437 visibleChar.truncate(0); |
129 | 438 } |
439 } | |
440 } | |
441 | |
442 /** | |
443 * Check if the given widget line is a folded line. | |
162 | 444 * |
129 | 445 * @param widgetLine the widget line number |
446 * @return <code>true</code> if the line is folded | |
447 */ | |
448 private bool isFoldedLine(int widgetLine) { | |
138 | 449 if ( cast(ITextViewerExtension5)fTextViewer ) { |
134 | 450 ITextViewerExtension5 extension= cast(ITextViewerExtension5)fTextViewer; |
129 | 451 int modelLine= extension.widgetLine2ModelLine(widgetLine); |
452 int widgetLine2= extension.modelLine2WidgetLine(modelLine + 1); | |
453 return widgetLine2 is -1; | |
454 } | |
455 return false; | |
456 } | |
457 | |
458 /** | |
459 * Redraw all of the text widgets visible content. | |
460 */ | |
461 private void redrawAll() { | |
462 fTextWidget.redraw(); | |
463 } | |
464 | |
465 /** | |
466 * Draw string at widget offset. | |
162 | 467 * |
129 | 468 * @param gc |
469 * @param offset the widget offset | |
470 * @param s the string to be drawn | |
471 * @param fg the foreground color | |
472 */ | |
473 private void draw(GC gc, int offset, String s, Color fg) { | |
474 // Compute baseline delta (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=165640) | |
475 int baseline= fTextWidget.getBaseline(offset); | |
476 FontMetrics fontMetrics= gc.getFontMetrics(); | |
477 int fontBaseline= fontMetrics.getAscent() + fontMetrics.getLeading(); | |
478 int baslineDelta= baseline - fontBaseline; | |
162 | 479 |
129 | 480 Point pos= fTextWidget.getLocationAtOffset(offset); |
481 gc.setForeground(fg); | |
482 gc.drawString(s, pos.x, pos.y + baslineDelta, true); | |
483 } | |
484 | |
485 /** | |
486 * Convert a document offset to the corresponding widget offset. | |
162 | 487 * |
129 | 488 * @param documentOffset |
489 * @return widget offset | |
490 */ | |
491 private int getWidgetOffset(int documentOffset) { | |
138 | 492 if ( cast(ITextViewerExtension5)fTextViewer ) { |
134 | 493 ITextViewerExtension5 extension= cast(ITextViewerExtension5)fTextViewer; |
129 | 494 return extension.modelOffset2WidgetOffset(documentOffset); |
495 } | |
496 IRegion visible= fTextViewer.getVisibleRegion(); | |
497 int widgetOffset= documentOffset - visible.getOffset(); | |
498 if (widgetOffset > visible.getLength()) { | |
499 return -1; | |
500 } | |
501 return widgetOffset; | |
502 } | |
503 | |
504 /** | |
505 * Convert a widget offset to the corresponding document offset. | |
162 | 506 * |
129 | 507 * @param widgetOffset |
508 * @return document offset | |
509 */ | |
510 private int getDocumentOffset(int widgetOffset) { | |
138 | 511 if ( cast(ITextViewerExtension5)fTextViewer ) { |
134 | 512 ITextViewerExtension5 extension= cast(ITextViewerExtension5)fTextViewer; |
129 | 513 return extension.widgetOffset2ModelOffset(widgetOffset); |
514 } | |
515 IRegion visible= fTextViewer.getVisibleRegion(); | |
516 if (widgetOffset > visible.getLength()) { | |
517 return -1; | |
518 } | |
519 return widgetOffset + visible.getOffset(); | |
520 } | |
521 | |
522 } |