Mercurial > projects > dwt-addons
annotate dwtx/jface/text/JFaceTextUtil.d @ 172:d994a8b2cdf7
again compile fixes
author | Frank Benoit <benoit@tionex.de> |
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date | Wed, 10 Sep 2008 23:14:02 +0200 |
parents | a9566845f1cb |
children |
rev | line source |
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129 | 1 /******************************************************************************* |
2 * Copyright (c) 2006, 2008 IBM Corporation 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 * IBM Corporation - initial API and implementation | |
10 * Port to the D programming language: | |
11 * Frank Benoit <benoit@tionex.de> | |
12 *******************************************************************************/ | |
13 module dwtx.jface.text.JFaceTextUtil; | |
14 | |
131 | 15 import dwtx.jface.text.IDocumentPartitioningListener; // packageimport |
16 import dwtx.jface.text.DefaultTextHover; // packageimport | |
17 import dwtx.jface.text.AbstractInformationControl; // packageimport | |
18 import dwtx.jface.text.TextUtilities; // packageimport | |
19 import dwtx.jface.text.IInformationControlCreatorExtension; // packageimport | |
20 import dwtx.jface.text.AbstractInformationControlManager; // packageimport | |
21 import dwtx.jface.text.ITextViewerExtension2; // packageimport | |
22 import dwtx.jface.text.IDocumentPartitioner; // packageimport | |
23 import dwtx.jface.text.DefaultIndentLineAutoEditStrategy; // packageimport | |
24 import dwtx.jface.text.ITextSelection; // packageimport | |
25 import dwtx.jface.text.Document; // packageimport | |
26 import dwtx.jface.text.FindReplaceDocumentAdapterContentProposalProvider; // packageimport | |
27 import dwtx.jface.text.ITextListener; // packageimport | |
28 import dwtx.jface.text.BadPartitioningException; // packageimport | |
29 import dwtx.jface.text.ITextViewerExtension5; // packageimport | |
30 import dwtx.jface.text.IDocumentPartitionerExtension3; // packageimport | |
31 import dwtx.jface.text.IUndoManager; // packageimport | |
32 import dwtx.jface.text.ITextHoverExtension2; // packageimport | |
33 import dwtx.jface.text.IRepairableDocument; // packageimport | |
34 import dwtx.jface.text.IRewriteTarget; // packageimport | |
35 import dwtx.jface.text.DefaultPositionUpdater; // packageimport | |
36 import dwtx.jface.text.RewriteSessionEditProcessor; // packageimport | |
37 import dwtx.jface.text.TextViewerHoverManager; // packageimport | |
38 import dwtx.jface.text.DocumentRewriteSession; // packageimport | |
39 import dwtx.jface.text.TextViewer; // packageimport | |
40 import dwtx.jface.text.ITextViewerExtension8; // packageimport | |
41 import dwtx.jface.text.RegExMessages; // packageimport | |
42 import dwtx.jface.text.IDelayedInputChangeProvider; // packageimport | |
43 import dwtx.jface.text.ITextOperationTargetExtension; // packageimport | |
44 import dwtx.jface.text.IWidgetTokenOwner; // packageimport | |
45 import dwtx.jface.text.IViewportListener; // packageimport | |
46 import dwtx.jface.text.GapTextStore; // packageimport | |
47 import dwtx.jface.text.MarkSelection; // packageimport | |
48 import dwtx.jface.text.IDocumentPartitioningListenerExtension; // packageimport | |
49 import dwtx.jface.text.IDocumentAdapterExtension; // packageimport | |
50 import dwtx.jface.text.IInformationControlExtension; // packageimport | |
51 import dwtx.jface.text.IDocumentPartitioningListenerExtension2; // packageimport | |
52 import dwtx.jface.text.DefaultDocumentAdapter; // packageimport | |
53 import dwtx.jface.text.ITextViewerExtension3; // packageimport | |
54 import dwtx.jface.text.IInformationControlCreator; // packageimport | |
55 import dwtx.jface.text.TypedRegion; // packageimport | |
56 import dwtx.jface.text.ISynchronizable; // packageimport | |
57 import dwtx.jface.text.IMarkRegionTarget; // packageimport | |
58 import dwtx.jface.text.TextViewerUndoManager; // packageimport | |
59 import dwtx.jface.text.IRegion; // packageimport | |
60 import dwtx.jface.text.IInformationControlExtension2; // packageimport | |
61 import dwtx.jface.text.IDocumentExtension4; // packageimport | |
62 import dwtx.jface.text.IDocumentExtension2; // packageimport | |
63 import dwtx.jface.text.IDocumentPartitionerExtension2; // packageimport | |
64 import dwtx.jface.text.Assert; // packageimport | |
65 import dwtx.jface.text.DefaultInformationControl; // packageimport | |
66 import dwtx.jface.text.IWidgetTokenOwnerExtension; // packageimport | |
67 import dwtx.jface.text.DocumentClone; // packageimport | |
68 import dwtx.jface.text.DefaultUndoManager; // packageimport | |
69 import dwtx.jface.text.IFindReplaceTarget; // packageimport | |
70 import dwtx.jface.text.IAutoEditStrategy; // packageimport | |
71 import dwtx.jface.text.ILineTrackerExtension; // packageimport | |
72 import dwtx.jface.text.IUndoManagerExtension; // packageimport | |
73 import dwtx.jface.text.TextSelection; // packageimport | |
74 import dwtx.jface.text.DefaultAutoIndentStrategy; // packageimport | |
75 import dwtx.jface.text.IAutoIndentStrategy; // packageimport | |
76 import dwtx.jface.text.IPainter; // packageimport | |
77 import dwtx.jface.text.IInformationControl; // packageimport | |
78 import dwtx.jface.text.IInformationControlExtension3; // packageimport | |
79 import dwtx.jface.text.ITextViewerExtension6; // packageimport | |
80 import dwtx.jface.text.IInformationControlExtension4; // packageimport | |
81 import dwtx.jface.text.DefaultLineTracker; // packageimport | |
82 import dwtx.jface.text.IDocumentInformationMappingExtension; // packageimport | |
83 import dwtx.jface.text.IRepairableDocumentExtension; // packageimport | |
84 import dwtx.jface.text.ITextHover; // packageimport | |
85 import dwtx.jface.text.FindReplaceDocumentAdapter; // packageimport | |
86 import dwtx.jface.text.ILineTracker; // packageimport | |
87 import dwtx.jface.text.Line; // packageimport | |
88 import dwtx.jface.text.ITextViewerExtension; // packageimport | |
89 import dwtx.jface.text.IDocumentAdapter; // packageimport | |
90 import dwtx.jface.text.TextEvent; // packageimport | |
91 import dwtx.jface.text.BadLocationException; // packageimport | |
92 import dwtx.jface.text.AbstractDocument; // packageimport | |
93 import dwtx.jface.text.AbstractLineTracker; // packageimport | |
94 import dwtx.jface.text.TreeLineTracker; // packageimport | |
95 import dwtx.jface.text.ITextPresentationListener; // packageimport | |
96 import dwtx.jface.text.Region; // packageimport | |
97 import dwtx.jface.text.ITextViewer; // packageimport | |
98 import dwtx.jface.text.IDocumentInformationMapping; // packageimport | |
99 import dwtx.jface.text.MarginPainter; // packageimport | |
100 import dwtx.jface.text.IPaintPositionManager; // packageimport | |
101 import dwtx.jface.text.TextPresentation; // packageimport | |
102 import dwtx.jface.text.IFindReplaceTargetExtension; // packageimport | |
103 import dwtx.jface.text.ISlaveDocumentManagerExtension; // packageimport | |
104 import dwtx.jface.text.ISelectionValidator; // packageimport | |
105 import dwtx.jface.text.IDocumentExtension; // packageimport | |
106 import dwtx.jface.text.PropagatingFontFieldEditor; // packageimport | |
107 import dwtx.jface.text.ConfigurableLineTracker; // packageimport | |
108 import dwtx.jface.text.SlaveDocumentEvent; // packageimport | |
109 import dwtx.jface.text.IDocumentListener; // packageimport | |
110 import dwtx.jface.text.PaintManager; // packageimport | |
111 import dwtx.jface.text.IFindReplaceTargetExtension3; // packageimport | |
112 import dwtx.jface.text.ITextDoubleClickStrategy; // packageimport | |
113 import dwtx.jface.text.IDocumentExtension3; // packageimport | |
114 import dwtx.jface.text.Position; // packageimport | |
115 import dwtx.jface.text.TextMessages; // packageimport | |
116 import dwtx.jface.text.CopyOnWriteTextStore; // packageimport | |
117 import dwtx.jface.text.WhitespaceCharacterPainter; // packageimport | |
118 import dwtx.jface.text.IPositionUpdater; // packageimport | |
119 import dwtx.jface.text.DefaultTextDoubleClickStrategy; // packageimport | |
120 import dwtx.jface.text.ListLineTracker; // packageimport | |
121 import dwtx.jface.text.ITextInputListener; // packageimport | |
122 import dwtx.jface.text.BadPositionCategoryException; // packageimport | |
123 import dwtx.jface.text.IWidgetTokenKeeperExtension; // packageimport | |
124 import dwtx.jface.text.IInputChangedListener; // packageimport | |
125 import dwtx.jface.text.ITextOperationTarget; // packageimport | |
126 import dwtx.jface.text.IDocumentInformationMappingExtension2; // packageimport | |
127 import dwtx.jface.text.ITextViewerExtension7; // packageimport | |
128 import dwtx.jface.text.IInformationControlExtension5; // packageimport | |
129 import dwtx.jface.text.IDocumentRewriteSessionListener; // packageimport | |
130 import dwtx.jface.text.AbstractReusableInformationControlCreator; // packageimport | |
131 import dwtx.jface.text.TabsToSpacesConverter; // packageimport | |
132 import dwtx.jface.text.CursorLinePainter; // packageimport | |
133 import dwtx.jface.text.ITextHoverExtension; // packageimport | |
134 import dwtx.jface.text.IEventConsumer; // packageimport | |
135 import dwtx.jface.text.IDocument; // packageimport | |
136 import dwtx.jface.text.IWidgetTokenKeeper; // packageimport | |
137 import dwtx.jface.text.DocumentCommand; // packageimport | |
138 import dwtx.jface.text.TypedPosition; // packageimport | |
139 import dwtx.jface.text.IEditingSupportRegistry; // packageimport | |
140 import dwtx.jface.text.IDocumentPartitionerExtension; // packageimport | |
141 import dwtx.jface.text.AbstractHoverInformationControlManager; // packageimport | |
142 import dwtx.jface.text.IEditingSupport; // packageimport | |
143 import dwtx.jface.text.IMarkSelection; // packageimport | |
144 import dwtx.jface.text.ISlaveDocumentManager; // packageimport | |
145 import dwtx.jface.text.DocumentEvent; // packageimport | |
146 import dwtx.jface.text.DocumentPartitioningChangedEvent; // packageimport | |
147 import dwtx.jface.text.ITextStore; // packageimport | |
148 import dwtx.jface.text.JFaceTextMessages; // packageimport | |
149 import dwtx.jface.text.DocumentRewriteSessionEvent; // packageimport | |
150 import dwtx.jface.text.SequentialRewriteTextStore; // packageimport | |
151 import dwtx.jface.text.DocumentRewriteSessionType; // packageimport | |
152 import dwtx.jface.text.TextAttribute; // packageimport | |
153 import dwtx.jface.text.ITextViewerExtension4; // packageimport | |
154 import dwtx.jface.text.ITypedRegion; // packageimport | |
155 | |
156 | |
129 | 157 import dwt.dwthelper.utils; |
158 | |
159 | |
160 | |
161 import dwt.custom.StyledText; | |
162 import dwt.graphics.GC; | |
163 import dwt.graphics.Point; | |
164 import dwt.graphics.Rectangle; | |
165 import dwt.widgets.Control; | |
166 import dwtx.jface.text.source.ILineRange; | |
167 import dwtx.jface.text.source.LineRange; | |
168 | |
169 /** | |
170 * A collection of JFace Text functions. | |
171 * <p> | |
172 * This class is neither intended to be instantiated nor subclassed. | |
173 * </p> | |
156 | 174 * |
129 | 175 * @since 3.3 |
176 * @noinstantiate This class is not intended to be instantiated by clients. | |
177 */ | |
178 public final class JFaceTextUtil { | |
156 | 179 |
133
7d818bd32d63
Fix ctors to this with gvim regexp
Frank Benoit <benoit@tionex.de>
parents:
131
diff
changeset
|
180 private this() { |
129 | 181 // Do not instantiate |
182 } | |
183 | |
184 /** | |
185 * Computes the line height for the given line range. | |
156 | 186 * |
129 | 187 * @param textWidget the <code>StyledText</code> widget |
188 * @param startLine the start line | |
189 * @param endLine the end line (exclusive) | |
190 * @param lineCount the line count used by the old API | |
191 * @return the height of all lines starting with <code>startLine</code> and ending above <code>endLime</code> | |
192 */ | |
193 public static int computeLineHeight(StyledText textWidget, int startLine, int endLine, int lineCount) { | |
194 return getLinePixel(textWidget, endLine) - getLinePixel(textWidget, startLine); | |
195 } | |
156 | 196 |
129 | 197 /** |
198 * Returns the last fully visible line of the widget. The exact semantics of "last fully visible | |
199 * line" are: | |
200 * <ul> | |
201 * <li>the last line of which the last pixel is visible, if any | |
202 * <li>otherwise, the only line that is partially visible | |
203 * </ul> | |
156 | 204 * |
129 | 205 * @param widget the widget |
206 * @return the last fully visible line | |
207 */ | |
208 public static int getBottomIndex(StyledText widget) { | |
209 int lastPixel= computeLastVisiblePixel(widget); | |
156 | 210 |
129 | 211 // bottom is in [0 .. lineCount - 1] |
212 int bottom= widget.getLineIndex(lastPixel); | |
213 | |
214 // bottom is the first line - no more checking | |
215 if (bottom is 0) | |
216 return bottom; | |
156 | 217 |
129 | 218 int pixel= widget.getLinePixel(bottom); |
219 // bottom starts on or before the client area start - bottom is the only visible line | |
220 if (pixel <= 0) | |
221 return bottom; | |
156 | 222 |
129 | 223 int offset= widget.getOffsetAtLine(bottom); |
224 int height= widget.getLineHeight(offset); | |
156 | 225 |
129 | 226 // bottom is not showing entirely - use the previous line |
227 if (pixel + height - 1 > lastPixel) | |
228 return bottom - 1; | |
156 | 229 |
129 | 230 // bottom is fully visible and its last line is exactly the last pixel |
231 return bottom; | |
232 } | |
233 | |
234 /** | |
235 * Returns the index of the first (possibly only partially) visible line of the widget | |
156 | 236 * |
129 | 237 * @param widget the widget |
238 * @return the index of the first line of which a pixel is visible | |
239 */ | |
240 public static int getPartialTopIndex(StyledText widget) { | |
241 // see StyledText#getPartialTopIndex() | |
242 int top= widget.getTopIndex(); | |
243 int pixels= widget.getLinePixel(top); | |
156 | 244 |
129 | 245 // FIXME remove when https://bugs.eclipse.org/bugs/show_bug.cgi?id=123770 is fixed |
246 if (pixels is -widget.getLineHeight(widget.getOffsetAtLine(top))) { | |
247 top++; | |
248 pixels= 0; | |
249 } | |
250 | |
251 if (pixels > 0) | |
252 top--; | |
156 | 253 |
129 | 254 return top; |
255 } | |
256 | |
257 /** | |
258 * Returns the index of the last (possibly only partially) visible line of the widget | |
156 | 259 * |
129 | 260 * @param widget the text widget |
261 * @return the index of the last line of which a pixel is visible | |
262 */ | |
263 public static int getPartialBottomIndex(StyledText widget) { | |
264 // @see StyledText#getPartialBottomIndex() | |
265 int lastPixel= computeLastVisiblePixel(widget); | |
266 int bottom= widget.getLineIndex(lastPixel); | |
267 return bottom; | |
268 } | |
269 | |
270 /** | |
271 * Returns the last visible pixel in the widget's client area. | |
156 | 272 * |
129 | 273 * @param widget the widget |
274 * @return the last visible pixel in the widget's client area | |
275 */ | |
276 private static int computeLastVisiblePixel(StyledText widget) { | |
277 int caHeight= widget.getClientArea().height; | |
278 int lastPixel= caHeight - 1; | |
279 // XXX what if there is a margin? can't take trim as this includes the scrollbars which are not part of the client area | |
280 // if ((textWidget.getStyle() & DWT.BORDER) !is 0) | |
281 // lastPixel -= 4; | |
282 return lastPixel; | |
283 } | |
156 | 284 |
129 | 285 /** |
286 * Returns the line index of the first visible model line in the viewer. The line may be only | |
287 * partially visible. | |
156 | 288 * |
129 | 289 * @param viewer the text viewer |
290 * @return the first line of which a pixel is visible, or -1 for no line | |
291 */ | |
292 public static int getPartialTopIndex(ITextViewer viewer) { | |
293 StyledText widget= viewer.getTextWidget(); | |
294 int widgetTop= getPartialTopIndex(widget); | |
295 return widgetLine2ModelLine(viewer, widgetTop); | |
296 } | |
156 | 297 |
129 | 298 /** |
299 * Returns the last, possibly partially, visible line in the view port. | |
300 * | |
301 * @param viewer the text viewer | |
302 * @return the last, possibly partially, visible line in the view port | |
303 */ | |
304 public static int getPartialBottomIndex(ITextViewer viewer) { | |
305 StyledText textWidget= viewer.getTextWidget(); | |
306 int widgetBottom= getPartialBottomIndex(textWidget); | |
307 return widgetLine2ModelLine(viewer, widgetBottom); | |
308 } | |
309 | |
310 /** | |
311 * Returns the range of lines that is visible in the viewer, including any partially visible | |
312 * lines. | |
156 | 313 * |
129 | 314 * @param viewer the viewer |
315 * @return the range of lines that is visible in the viewer, <code>null</code> if no lines are | |
316 * visible | |
317 */ | |
318 public static ILineRange getVisibleModelLines(ITextViewer viewer) { | |
319 int top= getPartialTopIndex(viewer); | |
320 int bottom= getPartialBottomIndex(viewer); | |
321 if (top is -1 || bottom is -1) | |
322 return null; | |
323 return new LineRange(top, bottom - top + 1); | |
324 } | |
325 | |
326 /** | |
327 * Converts a widget line into a model (i.e. {@link IDocument}) line using the | |
328 * {@link ITextViewerExtension5} if available, otherwise by adapting the widget line to the | |
329 * viewer's {@link ITextViewer#getVisibleRegion() visible region}. | |
156 | 330 * |
129 | 331 * @param viewer the viewer |
332 * @param widgetLine the widget line to convert. | |
333 * @return the model line corresponding to <code>widgetLine</code> or -1 to signal that there | |
334 * is no corresponding model line | |
335 */ | |
336 public static int widgetLine2ModelLine(ITextViewer viewer, int widgetLine) { | |
337 int modelLine; | |
138 | 338 if ( cast(ITextViewerExtension5)viewer ) { |
134 | 339 ITextViewerExtension5 extension= cast(ITextViewerExtension5) viewer; |
129 | 340 modelLine= extension.widgetLine2ModelLine(widgetLine); |
341 } else { | |
342 try { | |
343 IRegion r= viewer.getVisibleRegion(); | |
344 IDocument d= viewer.getDocument(); | |
345 modelLine= widgetLine + d.getLineOfOffset(r.getOffset()); | |
346 } catch (BadLocationException x) { | |
347 modelLine= widgetLine; | |
348 } | |
349 } | |
350 return modelLine; | |
351 } | |
156 | 352 |
129 | 353 /** |
354 * Converts a model (i.e. {@link IDocument}) line into a widget line using the | |
355 * {@link ITextViewerExtension5} if available, otherwise by adapting the model line to the | |
356 * viewer's {@link ITextViewer#getVisibleRegion() visible region}. | |
156 | 357 * |
129 | 358 * @param viewer the viewer |
359 * @param modelLine the model line to convert. | |
360 * @return the widget line corresponding to <code>modelLine</code> or -1 to signal that there | |
361 * is no corresponding widget line | |
362 */ | |
156 | 363 public static int modelLineToWidgetLine(ITextViewer viewer, int modelLine) { |
129 | 364 int widgetLine; |
138 | 365 if ( cast(ITextViewerExtension5)viewer ) { |
134 | 366 ITextViewerExtension5 extension= cast(ITextViewerExtension5) viewer; |
129 | 367 widgetLine= extension.modelLine2WidgetLine(modelLine); |
368 } else { | |
369 IRegion region= viewer.getVisibleRegion(); | |
370 IDocument document= viewer.getDocument(); | |
371 try { | |
372 int visibleStartLine= document.getLineOfOffset(region.getOffset()); | |
373 int visibleEndLine= document.getLineOfOffset(region.getOffset() + region.getLength()); | |
374 if (modelLine < visibleStartLine || modelLine > visibleEndLine) | |
375 widgetLine= -1; | |
376 else | |
377 widgetLine= modelLine - visibleStartLine; | |
378 } catch (BadLocationException x) { | |
379 // ignore and return -1 | |
380 widgetLine= -1; | |
381 } | |
382 } | |
383 return widgetLine; | |
384 } | |
385 | |
386 | |
387 /** | |
388 * Returns the number of hidden pixels of the first partially visible line. If there is no | |
389 * partially visible line, zero is returned. | |
156 | 390 * |
129 | 391 * @param textWidget the widget |
392 * @return the number of hidden pixels of the first partial line, always >= 0 | |
393 */ | |
394 public static int getHiddenTopLinePixels(StyledText textWidget) { | |
395 int top= getPartialTopIndex(textWidget); | |
396 return -textWidget.getLinePixel(top); | |
397 } | |
156 | 398 |
129 | 399 /* |
400 * @see StyledText#getLinePixel(int) | |
401 */ | |
402 public static int getLinePixel(StyledText textWidget, int line) { | |
403 return textWidget.getLinePixel(line); | |
404 } | |
156 | 405 |
129 | 406 /* |
407 * @see StyledText#getLineIndex(int) | |
408 */ | |
409 public static int getLineIndex(StyledText textWidget, int y) { | |
410 int lineIndex= textWidget.getLineIndex(y); | |
411 return lineIndex; | |
412 } | |
413 | |
414 /** | |
415 * Returns <code>true</code> if the widget displays the entire contents, i.e. it cannot | |
416 * be vertically scrolled. | |
156 | 417 * |
129 | 418 * @param widget the widget |
419 * @return <code>true</code> if the widget displays the entire contents, i.e. it cannot | |
420 * be vertically scrolled, <code>false</code> otherwise | |
421 */ | |
422 public static bool isShowingEntireContents(StyledText widget) { | |
423 if (widget.getTopPixel() !is 0) // more efficient shortcut | |
424 return false; | |
156 | 425 |
129 | 426 int lastVisiblePixel= computeLastVisiblePixel(widget); |
427 int lastPossiblePixel= widget.getLinePixel(widget.getLineCount()); | |
428 return lastPossiblePixel <= lastVisiblePixel; | |
429 } | |
430 | |
431 /** | |
432 * Determines the graphical area covered by the given text region in | |
433 * the given viewer. | |
434 * | |
435 * @param region the region whose graphical extend must be computed | |
436 * @param textViewer the text viewer containing the region | |
437 * @return the graphical extend of the given region in the given viewer | |
156 | 438 * |
129 | 439 * @since 3.4 |
440 */ | |
441 public static Rectangle computeArea(IRegion region, ITextViewer textViewer) { | |
442 int start= 0; | |
443 int end= 0; | |
444 IRegion widgetRegion= modelRange2WidgetRange(region, textViewer); | |
445 if (widgetRegion !is null) { | |
446 start= widgetRegion.getOffset(); | |
447 end= start + widgetRegion.getLength(); | |
448 } | |
156 | 449 |
129 | 450 StyledText styledText= textViewer.getTextWidget(); |
451 Rectangle bounds; | |
452 if (end > 0 && start < end) | |
453 bounds= styledText.getTextBounds(start, end - 1); | |
454 else { | |
455 Point loc= styledText.getLocationAtOffset(start); | |
456 bounds= new Rectangle(loc.x, loc.y, getAverageCharWidth(textViewer.getTextWidget()), styledText.getLineHeight(start)); | |
457 } | |
156 | 458 |
129 | 459 return new Rectangle(bounds.x, bounds.y, bounds.width, bounds.height); |
460 } | |
461 | |
462 /** | |
463 * Translates a given region of the text viewer's document into | |
464 * the corresponding region of the viewer's widget. | |
465 * | |
466 * @param region the document region | |
467 * @param textViewer the viewer containing the region | |
468 * @return the corresponding widget region | |
156 | 469 * |
129 | 470 * @since 3.4 |
471 */ | |
472 private static IRegion modelRange2WidgetRange(IRegion region, ITextViewer textViewer) { | |
138 | 473 if ( cast(ITextViewerExtension5)textViewer ) { |
134 | 474 ITextViewerExtension5 extension= cast(ITextViewerExtension5) textViewer; |
129 | 475 return extension.modelRange2WidgetRange(region); |
476 } | |
156 | 477 |
129 | 478 IRegion visibleRegion= textViewer.getVisibleRegion(); |
479 int start= region.getOffset() - visibleRegion.getOffset(); | |
480 int end= start + region.getLength(); | |
481 if (end > visibleRegion.getLength()) | |
482 end= visibleRegion.getLength(); | |
156 | 483 |
129 | 484 return new Region(start, end - start); |
485 } | |
486 | |
487 /** | |
488 * Returns the average character width of the given control's font. | |
156 | 489 * |
129 | 490 * @param control the control to calculate the average char width for |
491 * @return the average character width of the controls font | |
156 | 492 * |
129 | 493 * @since 3.4 |
494 */ | |
495 public static int getAverageCharWidth(Control control) { | |
496 GC gc= new GC(control); | |
497 gc.setFont(control.getFont()); | |
498 int increment= gc.getFontMetrics().getAverageCharWidth(); | |
499 gc.dispose(); | |
500 return increment; | |
501 } | |
502 | |
503 } |