Mercurial > projects > dwt-addons
annotate dwtx/jface/text/DefaultPositionUpdater.d @ 161:f8d52b926852
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| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Wed, 27 Aug 2008 14:49:30 +0200 |
| parents | 26688fec6d23 |
| children |
| rev | line source |
|---|---|
| 129 | 1 /******************************************************************************* |
| 2 * Copyright (c) 2000, 2007 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.DefaultPositionUpdater; | |
| 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.RewriteSessionEditProcessor; // packageimport | |
| 36 import dwtx.jface.text.TextViewerHoverManager; // packageimport | |
| 37 import dwtx.jface.text.DocumentRewriteSession; // packageimport | |
| 38 import dwtx.jface.text.TextViewer; // packageimport | |
| 39 import dwtx.jface.text.ITextViewerExtension8; // packageimport | |
| 40 import dwtx.jface.text.RegExMessages; // packageimport | |
| 41 import dwtx.jface.text.IDelayedInputChangeProvider; // packageimport | |
| 42 import dwtx.jface.text.ITextOperationTargetExtension; // packageimport | |
| 43 import dwtx.jface.text.IWidgetTokenOwner; // packageimport | |
| 44 import dwtx.jface.text.IViewportListener; // packageimport | |
| 45 import dwtx.jface.text.GapTextStore; // packageimport | |
| 46 import dwtx.jface.text.MarkSelection; // packageimport | |
| 47 import dwtx.jface.text.IDocumentPartitioningListenerExtension; // packageimport | |
| 48 import dwtx.jface.text.IDocumentAdapterExtension; // packageimport | |
| 49 import dwtx.jface.text.IInformationControlExtension; // packageimport | |
| 50 import dwtx.jface.text.IDocumentPartitioningListenerExtension2; // packageimport | |
| 51 import dwtx.jface.text.DefaultDocumentAdapter; // packageimport | |
| 52 import dwtx.jface.text.ITextViewerExtension3; // packageimport | |
| 53 import dwtx.jface.text.IInformationControlCreator; // packageimport | |
| 54 import dwtx.jface.text.TypedRegion; // packageimport | |
| 55 import dwtx.jface.text.ISynchronizable; // packageimport | |
| 56 import dwtx.jface.text.IMarkRegionTarget; // packageimport | |
| 57 import dwtx.jface.text.TextViewerUndoManager; // packageimport | |
| 58 import dwtx.jface.text.IRegion; // packageimport | |
| 59 import dwtx.jface.text.IInformationControlExtension2; // packageimport | |
| 60 import dwtx.jface.text.IDocumentExtension4; // packageimport | |
| 61 import dwtx.jface.text.IDocumentExtension2; // packageimport | |
| 62 import dwtx.jface.text.IDocumentPartitionerExtension2; // packageimport | |
| 63 import dwtx.jface.text.Assert; // packageimport | |
| 64 import dwtx.jface.text.DefaultInformationControl; // packageimport | |
| 65 import dwtx.jface.text.IWidgetTokenOwnerExtension; // packageimport | |
| 66 import dwtx.jface.text.DocumentClone; // packageimport | |
| 67 import dwtx.jface.text.DefaultUndoManager; // packageimport | |
| 68 import dwtx.jface.text.IFindReplaceTarget; // packageimport | |
| 69 import dwtx.jface.text.IAutoEditStrategy; // packageimport | |
| 70 import dwtx.jface.text.ILineTrackerExtension; // packageimport | |
| 71 import dwtx.jface.text.IUndoManagerExtension; // packageimport | |
| 72 import dwtx.jface.text.TextSelection; // packageimport | |
| 73 import dwtx.jface.text.DefaultAutoIndentStrategy; // packageimport | |
| 74 import dwtx.jface.text.IAutoIndentStrategy; // packageimport | |
| 75 import dwtx.jface.text.IPainter; // packageimport | |
| 76 import dwtx.jface.text.IInformationControl; // packageimport | |
| 77 import dwtx.jface.text.IInformationControlExtension3; // packageimport | |
| 78 import dwtx.jface.text.ITextViewerExtension6; // packageimport | |
| 79 import dwtx.jface.text.IInformationControlExtension4; // packageimport | |
| 80 import dwtx.jface.text.DefaultLineTracker; // packageimport | |
| 81 import dwtx.jface.text.IDocumentInformationMappingExtension; // packageimport | |
| 82 import dwtx.jface.text.IRepairableDocumentExtension; // packageimport | |
| 83 import dwtx.jface.text.ITextHover; // packageimport | |
| 84 import dwtx.jface.text.FindReplaceDocumentAdapter; // packageimport | |
| 85 import dwtx.jface.text.ILineTracker; // packageimport | |
| 86 import dwtx.jface.text.Line; // packageimport | |
| 87 import dwtx.jface.text.ITextViewerExtension; // packageimport | |
| 88 import dwtx.jface.text.IDocumentAdapter; // packageimport | |
| 89 import dwtx.jface.text.TextEvent; // packageimport | |
| 90 import dwtx.jface.text.BadLocationException; // packageimport | |
| 91 import dwtx.jface.text.AbstractDocument; // packageimport | |
| 92 import dwtx.jface.text.AbstractLineTracker; // packageimport | |
| 93 import dwtx.jface.text.TreeLineTracker; // packageimport | |
| 94 import dwtx.jface.text.ITextPresentationListener; // packageimport | |
| 95 import dwtx.jface.text.Region; // packageimport | |
| 96 import dwtx.jface.text.ITextViewer; // packageimport | |
| 97 import dwtx.jface.text.IDocumentInformationMapping; // packageimport | |
| 98 import dwtx.jface.text.MarginPainter; // packageimport | |
| 99 import dwtx.jface.text.IPaintPositionManager; // packageimport | |
| 100 import dwtx.jface.text.TextPresentation; // packageimport | |
| 101 import dwtx.jface.text.IFindReplaceTargetExtension; // packageimport | |
| 102 import dwtx.jface.text.ISlaveDocumentManagerExtension; // packageimport | |
| 103 import dwtx.jface.text.ISelectionValidator; // packageimport | |
| 104 import dwtx.jface.text.IDocumentExtension; // packageimport | |
| 105 import dwtx.jface.text.PropagatingFontFieldEditor; // packageimport | |
| 106 import dwtx.jface.text.ConfigurableLineTracker; // packageimport | |
| 107 import dwtx.jface.text.SlaveDocumentEvent; // packageimport | |
| 108 import dwtx.jface.text.IDocumentListener; // packageimport | |
| 109 import dwtx.jface.text.PaintManager; // packageimport | |
| 110 import dwtx.jface.text.IFindReplaceTargetExtension3; // packageimport | |
| 111 import dwtx.jface.text.ITextDoubleClickStrategy; // packageimport | |
| 112 import dwtx.jface.text.IDocumentExtension3; // packageimport | |
| 113 import dwtx.jface.text.Position; // packageimport | |
| 114 import dwtx.jface.text.TextMessages; // packageimport | |
| 115 import dwtx.jface.text.CopyOnWriteTextStore; // packageimport | |
| 116 import dwtx.jface.text.WhitespaceCharacterPainter; // packageimport | |
| 117 import dwtx.jface.text.IPositionUpdater; // packageimport | |
| 118 import dwtx.jface.text.DefaultTextDoubleClickStrategy; // packageimport | |
| 119 import dwtx.jface.text.ListLineTracker; // packageimport | |
| 120 import dwtx.jface.text.ITextInputListener; // packageimport | |
| 121 import dwtx.jface.text.BadPositionCategoryException; // packageimport | |
| 122 import dwtx.jface.text.IWidgetTokenKeeperExtension; // packageimport | |
| 123 import dwtx.jface.text.IInputChangedListener; // packageimport | |
| 124 import dwtx.jface.text.ITextOperationTarget; // packageimport | |
| 125 import dwtx.jface.text.IDocumentInformationMappingExtension2; // packageimport | |
| 126 import dwtx.jface.text.ITextViewerExtension7; // packageimport | |
| 127 import dwtx.jface.text.IInformationControlExtension5; // packageimport | |
| 128 import dwtx.jface.text.IDocumentRewriteSessionListener; // packageimport | |
| 129 import dwtx.jface.text.JFaceTextUtil; // 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 * Default implementation of {@link dwtx.jface.text.IPositionUpdater}. | |
| 162 * <p> | |
| 163 * A default position updater must be configured with the position category whose positions it will | |
| 164 * update. Other position categories are not affected by this updater. | |
| 165 * </p> | |
| 166 * <p> | |
| 167 * This implementation follows the specification below: | |
| 168 * </p> | |
| 169 * <ul> | |
| 170 * <li>Inserting or deleting text before the position shifts the position accordingly.</li> | |
| 171 * <li>Inserting text at the position offset shifts the position accordingly.</li> | |
| 172 * <li>Inserting or deleting text strictly contained by the position shrinks or stretches the | |
| 173 * position.</li> | |
| 174 * <li>Inserting or deleting text after a position does not affect the position.</li> | |
| 175 * <li>Deleting text which strictly contains the position deletes the position. Note that the | |
| 176 * position is not deleted if its only shrunken to length zero. To delete a position, the | |
| 177 * modification must delete from <i>strictly before</i> to <i>strictly after</i> the position.</li> | |
| 178 * <li>Replacing text overlapping with the position is considered as a sequence of first deleting | |
| 179 * the replaced text and afterwards inserting the new text. Thus, a position might first be shifted | |
| 180 * and shrunken and then be stretched.</li> | |
| 181 * </ul> | |
| 182 * This class can be used as is or be adapted by subclasses. Fields are protected to allow | |
| 183 * subclasses direct access. Because of the frequency with which position updaters are used this is | |
| 184 * a performance decision. | |
| 185 */ | |
| 186 public class DefaultPositionUpdater : IPositionUpdater { | |
| 187 | |
| 188 /** The position category the updater draws responsible for */ | |
| 189 private String fCategory; | |
| 190 | |
| 191 /** Caches the currently investigated position */ | |
| 192 protected Position fPosition; | |
| 193 /** | |
| 194 * Remembers the original state of the investigated position | |
| 195 * @since 2.1 | |
| 196 */ | |
| 161 | 197 protected Position fOriginalPosition; |
| 129 | 198 /** Caches the offset of the replaced text */ |
| 199 protected int fOffset; | |
| 200 /** Caches the length of the replaced text */ | |
| 201 protected int fLength; | |
| 202 /** Caches the length of the newly inserted text */ | |
| 203 protected int fReplaceLength; | |
| 204 /** Catches the document */ | |
| 205 protected IDocument fDocument; | |
| 206 | |
| 207 | |
| 208 /** | |
| 209 * Creates a new default position updater for the given category. | |
| 210 * | |
| 211 * @param category the category the updater is responsible for | |
| 212 */ | |
|
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213 public this(String category) { |
| 161 | 214 fOriginalPosition= new Position(0, 0); |
| 129 | 215 fCategory= category; |
| 216 } | |
| 217 | |
| 218 /** | |
| 219 * Returns the category this updater is responsible for. | |
| 220 * | |
| 221 * @return the category this updater is responsible for | |
| 222 */ | |
| 223 protected String getCategory() { | |
| 224 return fCategory; | |
| 225 } | |
| 226 | |
| 227 /** | |
| 228 * Returns whether the current event describes a well formed replace | |
| 229 * by which the current position is directly affected. | |
| 230 * | |
| 231 * @return <code>true</code> the current position is directly affected | |
| 232 * @since 3.0 | |
| 233 */ | |
| 234 protected bool isAffectingReplace() { | |
| 235 return fLength > 0 && fReplaceLength > 0 && fPosition.length < fOriginalPosition.length; | |
| 236 } | |
| 237 | |
| 238 /** | |
| 239 * Adapts the currently investigated position to an insertion. | |
| 240 */ | |
| 241 protected void adaptToInsert() { | |
| 242 | |
| 243 int myStart= fPosition.offset; | |
| 244 int myEnd= fPosition.offset + fPosition.length - 1; | |
| 245 myEnd= Math.max(myStart, myEnd); | |
| 246 | |
| 247 int yoursStart= fOffset; | |
| 248 int yoursEnd= fOffset + fReplaceLength -1; | |
| 249 yoursEnd= Math.max(yoursStart, yoursEnd); | |
| 250 | |
| 251 if (myEnd < yoursStart) | |
| 252 return; | |
| 253 | |
| 254 if (fLength <= 0) { | |
| 255 | |
| 256 if (myStart < yoursStart) | |
| 257 fPosition.length += fReplaceLength; | |
| 258 else | |
| 259 fPosition.offset += fReplaceLength; | |
| 260 | |
| 261 } else { | |
| 262 | |
| 263 if (myStart <= yoursStart && fOriginalPosition.offset <= yoursStart) | |
| 264 fPosition.length += fReplaceLength; | |
| 265 else | |
| 266 fPosition.offset += fReplaceLength; | |
| 267 } | |
| 268 } | |
| 269 | |
| 270 /** | |
| 271 * Adapts the currently investigated position to a deletion. | |
| 272 */ | |
| 273 protected void adaptToRemove() { | |
| 274 | |
| 275 int myStart= fPosition.offset; | |
| 276 int myEnd= fPosition.offset + fPosition.length -1; | |
| 277 myEnd= Math.max(myStart, myEnd); | |
| 278 | |
| 279 int yoursStart= fOffset; | |
| 280 int yoursEnd= fOffset + fLength -1; | |
| 281 yoursEnd= Math.max(yoursStart, yoursEnd); | |
| 282 | |
| 283 if (myEnd < yoursStart) | |
| 284 return; | |
| 285 | |
| 286 if (myStart <= yoursStart) { | |
| 287 | |
| 288 if (yoursEnd <= myEnd) | |
| 289 fPosition.length -= fLength; | |
| 290 else | |
| 291 fPosition.length -= (myEnd - yoursStart +1); | |
| 292 | |
| 293 } else if (yoursStart < myStart) { | |
| 294 | |
| 295 if (yoursEnd < myStart) | |
| 296 fPosition.offset -= fLength; | |
| 297 else { | |
| 298 fPosition.offset -= (myStart - yoursStart); | |
| 299 fPosition.length -= (yoursEnd - myStart +1); | |
| 300 } | |
| 301 | |
| 302 } | |
| 303 | |
| 304 // validate position to allowed values | |
| 305 if (fPosition.offset < 0) | |
| 306 fPosition.offset= 0; | |
| 307 | |
| 308 if (fPosition.length < 0) | |
| 309 fPosition.length= 0; | |
| 310 } | |
| 311 | |
| 312 /** | |
| 313 * Adapts the currently investigated position to the replace operation. | |
| 314 * First it checks whether the change replaces the whole range of the position. | |
| 315 * If not, it performs first the deletion of the previous text and afterwards | |
| 316 * the insertion of the new text. | |
| 317 */ | |
| 318 protected void adaptToReplace() { | |
| 319 | |
| 320 if (fPosition.offset is fOffset && fPosition.length is fLength && fPosition.length > 0) { | |
| 321 | |
| 322 // replace the whole range of the position | |
| 323 fPosition.length += (fReplaceLength - fLength); | |
| 324 if (fPosition.length < 0) { | |
| 325 fPosition.offset += fPosition.length; | |
| 326 fPosition.length= 0; | |
| 327 } | |
| 328 | |
| 329 } else { | |
| 330 | |
| 331 if (fLength > 0) | |
| 332 adaptToRemove(); | |
| 333 | |
| 334 if (fReplaceLength > 0) | |
| 335 adaptToInsert(); | |
| 336 } | |
| 337 } | |
| 338 | |
| 339 /** | |
| 340 * Determines whether the currently investigated position has been deleted by | |
| 341 * the replace operation specified in the current event. If so, it deletes | |
| 342 * the position and removes it from the document's position category. | |
| 343 * | |
| 344 * @return <code>true</code> if position has not been deleted | |
| 345 */ | |
| 346 protected bool notDeleted() { | |
| 347 | |
| 348 if (fOffset < fPosition.offset && (fPosition.offset + fPosition.length < fOffset + fLength)) { | |
| 349 | |
|
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350 fPosition.delete_(); |
| 129 | 351 |
| 352 try { | |
| 353 fDocument.removePosition(fCategory, fPosition); | |
| 354 } catch (BadPositionCategoryException x) { | |
| 355 } | |
| 356 | |
| 357 return false; | |
| 358 } | |
| 359 | |
| 360 return true; | |
| 361 } | |
| 362 | |
| 363 /* | |
| 364 * @see dwtx.jface.text.IPositionUpdater#update(dwtx.jface.text.DocumentEvent) | |
| 365 */ | |
| 366 public void update(DocumentEvent event) { | |
| 367 | |
| 368 try { | |
| 369 | |
| 370 | |
| 371 fOffset= event.getOffset(); | |
| 372 fLength= event.getLength(); | |
| 373 fReplaceLength= (event.getText() is null ? 0 : event.getText().length()); | |
| 374 fDocument= event.getDocument(); | |
| 375 | |
| 376 Position[] category= fDocument.getPositions(fCategory); | |
| 377 for (int i= 0; i < category.length; i++) { | |
| 378 | |
| 379 fPosition= category[i]; | |
| 380 fOriginalPosition.offset= fPosition.offset; | |
| 381 fOriginalPosition.length= fPosition.length; | |
| 382 | |
| 383 if (notDeleted()) | |
| 384 adaptToReplace(); | |
| 385 } | |
| 386 | |
| 387 } catch (BadPositionCategoryException x) { | |
| 388 // do nothing | |
| 389 } finally { | |
| 390 fDocument= null; | |
| 391 } | |
| 392 } | |
| 393 } |