Mercurial > projects > dwt-addons
annotate dwtx/jface/internal/text/link/contentassist/ContextInformationPopup2.d @ 158:25f1f92fa3df
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| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Tue, 26 Aug 2008 02:46:34 +0200 |
| parents | f70d9508c95c |
| children | 1a5b8f8129df |
| rev | line source |
|---|---|
| 129 | 1 /******************************************************************************* |
| 2 * Copyright (c) 2000, 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 | |
| 131 | 14 |
| 151 | 15 module dwtx.jface.internal.text.link.contentassist.ContextInformationPopup2; |
| 16 | |
| 131 | 17 import dwtx.jface.internal.text.link.contentassist.IProposalListener; // packageimport |
| 18 import dwtx.jface.internal.text.link.contentassist.LineBreakingReader; // packageimport | |
| 19 import dwtx.jface.internal.text.link.contentassist.CompletionProposalPopup2; // packageimport | |
| 20 import dwtx.jface.internal.text.link.contentassist.ContentAssistMessages; // packageimport | |
| 21 import dwtx.jface.internal.text.link.contentassist.Helper2; // packageimport | |
| 22 import dwtx.jface.internal.text.link.contentassist.PopupCloser2; // packageimport | |
| 23 import dwtx.jface.internal.text.link.contentassist.IContentAssistListener2; // packageimport | |
| 24 import dwtx.jface.internal.text.link.contentassist.ContentAssistant2; // packageimport | |
| 25 import dwtx.jface.internal.text.link.contentassist.AdditionalInfoController2; // packageimport | |
| 26 | |
| 129 | 27 import dwt.dwthelper.utils; |
| 28 | |
| 29 | |
|
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30 import dwtx.dwtxhelper.Collection; |
| 129 | 31 |
| 32 import dwt.DWT; | |
| 33 import dwt.custom.BusyIndicator; | |
| 34 import dwt.custom.StyledText; | |
| 35 import dwt.events.KeyEvent; | |
| 36 import dwt.events.SelectionEvent; | |
| 37 import dwt.events.SelectionListener; | |
| 38 import dwt.events.VerifyEvent; | |
| 39 import dwt.graphics.Color; | |
| 40 import dwt.graphics.Point; | |
| 41 import dwt.layout.GridData; | |
| 42 import dwt.layout.GridLayout; | |
| 43 import dwt.widgets.Control; | |
| 44 import dwt.widgets.Display; | |
| 45 import dwt.widgets.Shell; | |
| 46 import dwt.widgets.Table; | |
| 47 import dwt.widgets.TableItem; | |
| 48 import dwtx.jface.text.ITextViewer; | |
| 49 import dwtx.jface.text.TextPresentation; | |
| 50 import dwtx.jface.text.contentassist.IContextInformation; | |
| 51 import dwtx.jface.text.contentassist.IContextInformationExtension; | |
| 52 import dwtx.jface.text.contentassist.IContextInformationPresenter; | |
| 53 import dwtx.jface.text.contentassist.IContextInformationValidator; | |
| 54 | |
| 55 | |
| 56 /** | |
| 57 * This class is used to present context information to the user. | |
| 58 * If multiple contexts are valid at the current cursor location, | |
| 59 * a list is presented from which the user may choose one context. | |
| 60 * Once the user makes their choice, or if there was only a single | |
| 61 * possible context, the context information is shown in a tooltip like popup. <p> | |
| 62 * If the tooltip is visible and the user wants to see context information of | |
| 63 * a context embedded into the one for which context information is displayed, | |
| 64 * context information for the embedded context is shown. As soon as the | |
| 65 * cursor leaves the embedded context area, the context information for | |
| 66 * the embedding context is shown again. | |
| 67 * | |
| 68 * @see IContextInformation | |
| 69 * @see IContextInformationValidator | |
| 70 */ | |
| 71 class ContextInformationPopup2 : IContentAssistListener2 { | |
| 72 | |
| 73 | |
| 74 | |
| 75 /** | |
| 76 * Represents the state necessary for embedding contexts. | |
| 77 * @since 2.0 | |
| 78 */ | |
| 79 static class ContextFrame { | |
| 80 public int fBeginOffset; | |
| 81 public int fOffset; | |
| 82 public int fVisibleOffset; | |
| 83 public IContextInformation fInformation; | |
| 84 public IContextInformationValidator fValidator; | |
| 85 public IContextInformationPresenter fPresenter; | |
| 86 } | |
| 87 | |
| 88 private ITextViewer fViewer; | |
| 89 private ContentAssistant2 fContentAssistant; | |
| 90 | |
| 91 private PopupCloser2 fPopupCloser= new PopupCloser2(); | |
| 92 private Shell fContextSelectorShell; | |
| 93 private Table fContextSelectorTable; | |
| 94 private IContextInformation[] fContextSelectorInput; | |
| 95 private String fLineDelimiter= null; | |
| 96 | |
| 97 private Shell fContextInfoPopup; | |
| 98 private StyledText fContextInfoText; | |
| 99 private TextPresentation fTextPresentation; | |
| 100 | |
| 101 private Stack fContextFrameStack= new Stack(); | |
| 102 | |
| 103 | |
| 104 /** | |
| 105 * Creates a new context information popup. | |
| 106 * | |
| 107 * @param contentAssistant the content assist for computing the context information | |
| 108 * @param viewer the viewer on top of which the context information is shown | |
| 109 */ | |
|
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110 public this(ContentAssistant2 contentAssistant, ITextViewer viewer) { |
| 129 | 111 fContentAssistant= contentAssistant; |
| 112 fViewer= viewer; | |
| 113 } | |
| 114 | |
| 115 /** | |
| 116 * Shows all possible contexts for the given cursor position of the viewer. | |
| 117 * | |
| 118 * @param autoActivated <code>true</code> if auto activated | |
| 119 * @return a potential error message or <code>null</code> in case of no error | |
| 120 */ | |
| 158 | 121 public String showContextProposals(bool autoActivated) { |
| 129 | 122 final StyledText styledText= fViewer.getTextWidget(); |
| 158 | 123 BusyIndicator.showWhile(styledText.getDisplay(), dgRunnable( (bool autoActivated_, StyledText styledText_ ) { |
| 124 int position= fViewer.getSelectedRange().x; | |
| 129 | 125 |
| 158 | 126 IContextInformation[] contexts= computeContextInformation(position); |
| 127 int count = (contexts is null ? 0 : contexts.length); | |
| 128 if (count is 1) { | |
| 129 | 129 |
| 158 | 130 // Show context information directly |
| 131 internalShowContextInfo(contexts[0], position); | |
| 129 | 132 |
| 158 | 133 } else if (count > 0) { |
| 134 // Precise context must be selected | |
| 129 | 135 |
| 158 | 136 if (fLineDelimiter is null) |
| 137 fLineDelimiter= styledText_.getLineDelimiter(); | |
| 129 | 138 |
| 158 | 139 createContextSelector(); |
| 140 setContexts(contexts); | |
| 141 displayContextSelector(); | |
| 142 hideContextInfoPopup(); | |
| 129 | 143 |
| 158 | 144 } else if (!autoActivated_) { |
| 145 styledText_.getDisplay().beep(); | |
| 129 | 146 } |
| 158 | 147 }, autoActivated, styledText )); |
| 129 | 148 |
| 149 return getErrorMessage(); | |
| 150 } | |
| 151 | |
| 152 /** | |
| 153 * Displays the given context information for the given offset. | |
| 154 * | |
| 155 * @param info the context information | |
| 156 * @param position the offset | |
| 157 * @since 2.0 | |
| 158 */ | |
| 158 | 159 public void showContextInformation(IContextInformation info, int position) { |
| 129 | 160 Control control= fViewer.getTextWidget(); |
| 158 | 161 BusyIndicator.showWhile(control.getDisplay(), dgRunnable( (IContextInformation info_, int position_) { |
| 162 internalShowContextInfo(info_, position_); | |
| 163 hideContextSelector(); | |
| 164 }, info, position)); | |
| 129 | 165 } |
| 166 | |
| 167 /** | |
| 168 * Displays the given context information for the given offset. | |
| 169 * | |
| 170 * @param information the context information | |
| 171 * @param offset the offset | |
| 172 * @since 2.0 | |
| 173 */ | |
| 174 | |
| 175 private void internalShowContextInfo(IContextInformation information, int offset) { | |
| 176 | |
| 177 IContextInformationValidator validator= fContentAssistant.getContextInformationValidator(fViewer, offset); | |
| 178 | |
| 179 if (validator !is null) { | |
| 180 ContextFrame current= new ContextFrame(); | |
| 181 current.fInformation= information; | |
| 138 | 182 current.fBeginOffset= ( cast(IContextInformationExtension)information ) ? (cast(IContextInformationExtension) information).getContextInformationPosition() : offset; |
| 129 | 183 if (current.fBeginOffset is -1) current.fBeginOffset= offset; |
| 184 current.fOffset= offset; | |
| 185 current.fVisibleOffset= fViewer.getTextWidget().getSelectionRange().x - (offset - current.fBeginOffset); | |
| 186 current.fValidator= validator; | |
| 187 current.fPresenter= fContentAssistant.getContextInformationPresenter(fViewer, offset); | |
| 188 | |
| 189 fContextFrameStack.push(current); | |
| 190 | |
| 191 internalShowContextFrame(current, fContextFrameStack.size() is 1); | |
| 192 } | |
| 193 } | |
| 194 | |
| 195 /** | |
| 196 * Shows the given context frame. | |
| 197 * | |
| 198 * @param frame the frane to display | |
| 199 * @param initial <code>true</code> if this is the first frame to be displayed | |
| 200 * @since 2.0 | |
| 201 */ | |
| 202 private void internalShowContextFrame(ContextFrame frame, bool initial) { | |
| 203 | |
| 204 frame.fValidator.install(frame.fInformation, fViewer, frame.fOffset); | |
| 205 | |
| 206 if (frame.fPresenter !is null) { | |
| 207 if (fTextPresentation is null) | |
| 208 fTextPresentation= new TextPresentation(); | |
| 209 frame.fPresenter.install(frame.fInformation, fViewer, frame.fBeginOffset); | |
| 210 frame.fPresenter.updatePresentation(frame.fOffset, fTextPresentation); | |
| 211 } | |
| 212 | |
| 213 createContextInfoPopup(); | |
| 214 | |
| 215 fContextInfoText.setText(frame.fInformation.getInformationDisplayString()); | |
| 216 if (fTextPresentation !is null) | |
| 217 TextPresentation.applyTextPresentation(fTextPresentation, fContextInfoText); | |
| 218 resize(); | |
| 219 | |
| 220 if (initial) { | |
| 221 if (fContentAssistant.addContentAssistListener(this, ContentAssistant2.CONTEXT_INFO_POPUP)) { | |
| 222 fContentAssistant.addToLayout(this, fContextInfoPopup, ContentAssistant2.LayoutManager.LAYOUT_CONTEXT_INFO_POPUP, frame.fVisibleOffset); | |
| 223 fContextInfoPopup.setVisible(true); | |
| 224 } | |
| 225 } else { | |
| 226 fContentAssistant.layout(ContentAssistant2.LayoutManager.LAYOUT_CONTEXT_INFO_POPUP, frame.fVisibleOffset); | |
| 227 } | |
| 228 } | |
| 229 | |
| 230 /** | |
| 231 * Computes all possible context information for the given offset. | |
| 232 * | |
| 233 * @param position the offset | |
| 234 * @return all possible context information for the given offset | |
| 235 * @since 2.0 | |
| 236 */ | |
| 237 private IContextInformation[] computeContextInformation(int position) { | |
| 238 return fContentAssistant.computeContextInformation(fViewer, position); | |
| 239 } | |
| 240 | |
| 241 /** | |
| 242 *Returns the error message generated while computing context information. | |
| 243 * | |
| 244 * @return the error message | |
| 245 */ | |
| 246 private String getErrorMessage() { | |
| 247 return fContentAssistant.getErrorMessage(); | |
| 248 } | |
| 249 | |
| 250 /** | |
| 251 * Creates the context information popup. This is the tooltip like overlay window. | |
| 252 */ | |
| 253 private void createContextInfoPopup() { | |
| 254 if (Helper2.okToUse(fContextInfoPopup)) | |
| 255 return; | |
| 256 | |
| 257 Control control= fViewer.getTextWidget(); | |
| 258 Display display= control.getDisplay(); | |
| 259 | |
| 260 fContextInfoPopup= new Shell(control.getShell(), DWT.NO_TRIM | DWT.ON_TOP); | |
| 261 fContextInfoPopup.setBackground(display.getSystemColor(DWT.COLOR_BLACK)); | |
| 262 | |
| 263 fContextInfoText= new StyledText(fContextInfoPopup, DWT.MULTI | DWT.READ_ONLY); | |
| 264 | |
| 265 Color c= fContentAssistant.getContextInformationPopupBackground(); | |
| 266 if (c is null) | |
| 267 c= display.getSystemColor(DWT.COLOR_INFO_BACKGROUND); | |
| 268 fContextInfoText.setBackground(c); | |
| 269 | |
| 270 c= fContentAssistant.getContextInformationPopupForeground(); | |
| 271 if (c is null) | |
| 272 c= display.getSystemColor(DWT.COLOR_INFO_FOREGROUND); | |
| 273 fContextInfoText.setForeground(c); | |
| 274 } | |
| 275 | |
| 276 /** | |
| 277 * Resizes the context information popup. | |
| 278 * @since 2.0 | |
| 279 */ | |
| 280 private void resize() { | |
| 281 Point size= fContextInfoText.computeSize(DWT.DEFAULT, DWT.DEFAULT, true); | |
| 282 size.x += 3; | |
| 283 fContextInfoText.setSize(size); | |
| 284 fContextInfoText.setLocation(1,1); | |
| 285 size.x += 2; | |
| 286 size.y += 2; | |
| 287 fContextInfoPopup.setSize(size); | |
| 288 } | |
| 289 | |
| 290 /** | |
| 291 *Hides the context information popup. | |
| 292 */ | |
| 293 private void hideContextInfoPopup() { | |
| 294 | |
| 295 if (Helper2.okToUse(fContextInfoPopup)) { | |
| 296 | |
| 297 int size= fContextFrameStack.size(); | |
| 298 if (size > 0) { | |
| 299 fContextFrameStack.pop(); | |
| 300 -- size; | |
| 301 } | |
| 302 | |
| 303 if (size > 0) { | |
| 134 | 304 ContextFrame current= cast(ContextFrame) fContextFrameStack.peek(); |
| 129 | 305 internalShowContextFrame(current, false); |
| 306 } else { | |
| 307 | |
| 308 fContentAssistant.removeContentAssistListener(this, ContentAssistant2.CONTEXT_INFO_POPUP); | |
| 309 | |
| 310 fContextInfoPopup.setVisible(false); | |
| 311 fContextInfoPopup.dispose(); | |
| 312 fContextInfoPopup= null; | |
| 313 | |
| 314 if (fTextPresentation !is null) { | |
| 315 fTextPresentation.clear(); | |
| 316 fTextPresentation= null; | |
| 317 } | |
| 318 } | |
| 319 } | |
| 320 | |
| 321 if (fContextInfoPopup is null) | |
| 322 fContentAssistant.contextInformationClosed(); | |
| 323 } | |
| 324 | |
| 325 /** | |
| 326 * Creates the context selector in case the user has the choice between multiple valid contexts | |
| 327 * at a given offset. | |
| 328 */ | |
| 329 private void createContextSelector() { | |
| 330 if (Helper2.okToUse(fContextSelectorShell)) | |
| 331 return; | |
| 332 | |
| 333 Control control= fViewer.getTextWidget(); | |
| 334 fContextSelectorShell= new Shell(control.getShell(), DWT.NO_TRIM | DWT.ON_TOP); | |
| 335 GridLayout layout= new GridLayout(); | |
| 336 layout.marginWidth= 0; | |
| 337 layout.marginHeight= 0; | |
| 338 fContextSelectorShell.setLayout(layout); | |
| 339 fContextSelectorShell.setBackground(control.getDisplay().getSystemColor(DWT.COLOR_BLACK)); | |
| 340 | |
| 341 | |
| 342 fContextSelectorTable= new Table(fContextSelectorShell, DWT.H_SCROLL | DWT.V_SCROLL); | |
| 343 fContextSelectorTable.setLocation(1, 1); | |
| 344 GridData gd= new GridData(GridData.FILL_BOTH); | |
| 345 gd.heightHint= fContextSelectorTable.getItemHeight() * 10; | |
| 346 gd.widthHint= 300; | |
| 347 fContextSelectorTable.setLayoutData(gd); | |
| 348 | |
| 349 fContextSelectorShell.pack(true); | |
| 350 | |
| 351 Color c= fContentAssistant.getContextSelectorBackground(); | |
| 352 if (c is null) | |
| 353 c= control.getDisplay().getSystemColor(DWT.COLOR_INFO_BACKGROUND); | |
| 354 fContextSelectorTable.setBackground(c); | |
| 355 | |
| 356 c= fContentAssistant.getContextSelectorForeground(); | |
| 357 if (c is null) | |
| 358 c= control.getDisplay().getSystemColor(DWT.COLOR_INFO_FOREGROUND); | |
| 359 fContextSelectorTable.setForeground(c); | |
| 360 | |
| 135 | 361 fContextSelectorTable.addSelectionListener(new class() SelectionListener { |
| 129 | 362 public void widgetSelected(SelectionEvent e) { |
| 363 } | |
| 364 | |
| 365 public void widgetDefaultSelected(SelectionEvent e) { | |
| 366 insertSelectedContext(); | |
| 367 hideContextSelector(); | |
| 368 } | |
| 369 }); | |
| 370 | |
| 371 fPopupCloser.install(fContentAssistant, fContextSelectorTable); | |
| 372 | |
| 373 fContextSelectorTable.setHeaderVisible(false); | |
| 374 fContentAssistant.addToLayout(this, fContextSelectorShell, ContentAssistant2.LayoutManager.LAYOUT_CONTEXT_SELECTOR, fContentAssistant.getSelectionOffset()); | |
| 375 } | |
| 376 | |
| 377 /** | |
| 378 * Causes the context information of the context selected in the context selector | |
| 379 * to be displayed in the context information popup. | |
| 380 */ | |
| 381 private void insertSelectedContext() { | |
| 382 int i= fContextSelectorTable.getSelectionIndex(); | |
| 383 | |
| 384 if (i < 0 || i >= fContextSelectorInput.length) | |
| 385 return; | |
| 386 | |
| 387 int position= fViewer.getSelectedRange().x; | |
| 388 internalShowContextInfo(fContextSelectorInput[i], position); | |
| 389 } | |
| 390 | |
| 391 /** | |
| 392 * Sets the contexts in the context selector to the given set. | |
| 393 * | |
| 394 * @param contexts the possible contexts | |
| 395 */ | |
| 396 private void setContexts(IContextInformation[] contexts) { | |
| 397 if (Helper2.okToUse(fContextSelectorTable)) { | |
| 398 | |
| 399 fContextSelectorInput= contexts; | |
| 400 | |
| 401 fContextSelectorTable.setRedraw(false); | |
| 402 fContextSelectorTable.removeAll(); | |
| 403 | |
| 404 TableItem item; | |
| 405 IContextInformation t; | |
| 406 for (int i= 0; i < contexts.length; i++) { | |
| 407 t= contexts[i]; | |
| 408 item= new TableItem(fContextSelectorTable, DWT.NULL); | |
| 409 if (t.getImage() !is null) | |
| 410 item.setImage(t.getImage()); | |
| 411 item.setText(t.getContextDisplayString()); | |
| 412 } | |
| 413 | |
| 414 fContextSelectorTable.select(0); | |
| 415 fContextSelectorTable.setRedraw(true); | |
| 416 } | |
| 417 } | |
| 418 | |
| 419 /** | |
| 420 * Displays the context selector. | |
| 421 */ | |
| 422 private void displayContextSelector() { | |
| 423 if (fContentAssistant.addContentAssistListener(this, ContentAssistant2.CONTEXT_SELECTOR)) | |
| 424 fContextSelectorShell.setVisible(true); | |
| 425 } | |
| 426 | |
| 427 /** | |
| 428 * Hodes the context selector. | |
| 429 */ | |
| 430 private void hideContextSelector() { | |
| 431 if (Helper2.okToUse(fContextSelectorShell)) { | |
| 432 fContentAssistant.removeContentAssistListener(this, ContentAssistant2.CONTEXT_SELECTOR); | |
| 433 | |
| 434 fPopupCloser.uninstall(); | |
| 435 fContextSelectorShell.setVisible(false); | |
| 436 fContextSelectorShell.dispose(); | |
| 437 fContextSelectorShell= null; | |
| 438 } | |
| 439 | |
| 440 if (!Helper2.okToUse(fContextInfoPopup)) | |
| 441 fContentAssistant.contextInformationClosed(); | |
| 442 } | |
| 443 | |
| 444 /** | |
| 445 *Returns whether the context selector has the focus. | |
| 446 * | |
| 447 * @return <code>true</code> if teh context selector has the focus | |
| 448 */ | |
| 449 public bool hasFocus() { | |
| 450 if (Helper2.okToUse(fContextSelectorShell)) | |
| 451 return (fContextSelectorShell.isFocusControl() || fContextSelectorTable.isFocusControl()); | |
| 452 | |
| 453 return false; | |
| 454 } | |
| 455 | |
| 456 /** | |
| 457 * Hides context selector and context information popup. | |
| 458 */ | |
| 459 public void hide() { | |
| 460 hideContextSelector(); | |
| 461 hideContextInfoPopup(); | |
| 462 } | |
| 463 | |
| 464 /** | |
| 465 * Returns whether this context information popup is active. I.e., either | |
| 466 * a context selector or context information is displayed. | |
| 467 * | |
| 468 * @return <code>true</code> if the context selector is active | |
| 469 */ | |
| 470 public bool isActive() { | |
| 471 return (Helper2.okToUse(fContextInfoPopup) || Helper2.okToUse(fContextSelectorShell)); | |
| 472 } | |
| 473 | |
| 474 /* | |
| 475 * @see IContentAssistListener#verifyKey(VerifyEvent) | |
| 476 */ | |
| 477 public bool verifyKey(VerifyEvent e) { | |
| 478 if (Helper2.okToUse(fContextSelectorShell)) | |
| 479 return contextSelectorKeyPressed(e); | |
| 480 if (Helper2.okToUse(fContextInfoPopup)) | |
| 481 return contextInfoPopupKeyPressed(e); | |
| 482 return true; | |
| 483 } | |
| 484 | |
| 485 /** | |
| 486 * Processes a key stroke in the context selector. | |
| 487 * | |
| 488 * @param e the verify event describing the key stroke | |
| 489 * @return <code>true</code> if processing can be stopped | |
| 490 */ | |
| 491 private bool contextSelectorKeyPressed(VerifyEvent e) { | |
| 492 | |
| 493 char key= e.character; | |
| 494 if (key is 0) { | |
| 495 | |
| 496 int change; | |
| 497 int visibleRows= (fContextSelectorTable.getSize().y / fContextSelectorTable.getItemHeight()) - 1; | |
| 498 int selection= fContextSelectorTable.getSelectionIndex(); | |
| 499 | |
| 500 switch (e.keyCode) { | |
| 501 | |
| 502 case DWT.ARROW_UP: | |
| 503 change= (fContextSelectorTable.getSelectionIndex() > 0 ? -1 : 0); | |
| 504 break; | |
| 505 | |
| 506 case DWT.ARROW_DOWN: | |
| 507 change= (fContextSelectorTable.getSelectionIndex() < fContextSelectorTable.getItemCount() - 1 ? 1 : 0); | |
| 508 break; | |
| 509 | |
| 510 case DWT.PAGE_DOWN : | |
| 511 change= visibleRows; | |
| 512 if (selection + change >= fContextSelectorTable.getItemCount()) | |
| 513 change= fContextSelectorTable.getItemCount() - selection; | |
| 514 break; | |
| 515 | |
| 516 case DWT.PAGE_UP : | |
| 517 change= -visibleRows; | |
| 518 if (selection + change < 0) | |
| 519 change= -selection; | |
| 520 break; | |
| 521 | |
| 522 case DWT.HOME : | |
| 523 change= -selection; | |
| 524 break; | |
| 525 | |
| 526 case DWT.END : | |
| 527 change= fContextSelectorTable.getItemCount() - selection; | |
| 528 break; | |
| 529 | |
| 530 default: | |
| 531 if (e.keyCode !is DWT.MOD1 && e.keyCode !is DWT.MOD2 && e.keyCode !is DWT.MOD3 && e.keyCode !is DWT.MOD4) | |
| 532 hideContextSelector(); | |
| 533 return true; | |
| 534 } | |
| 535 | |
| 536 fContextSelectorTable.setSelection(selection + change); | |
| 537 fContextSelectorTable.showSelection(); | |
| 538 e.doit= false; | |
| 539 return false; | |
| 540 | |
| 541 } else if ('\t' is key) { | |
| 542 // switch focus to selector shell | |
| 543 e.doit= false; | |
| 544 fContextSelectorShell.setFocus(); | |
| 545 return false; | |
| 546 } else if (key is DWT.ESC) { | |
| 547 e.doit= false; | |
| 548 hideContextSelector(); | |
| 549 } | |
| 550 | |
| 551 return true; | |
| 552 } | |
| 553 | |
| 554 /** | |
| 555 * Processes a key stroke while the info popup is up. | |
| 556 * | |
| 557 * @param e the verify event describing the key stroke | |
| 558 * @return <code>true</code> if processing can be stopped | |
| 559 */ | |
| 560 private bool contextInfoPopupKeyPressed(KeyEvent e) { | |
| 561 | |
| 562 char key= e.character; | |
| 563 if (key is 0) { | |
| 564 | |
| 565 switch (e.keyCode) { | |
| 566 case DWT.ARROW_LEFT: | |
| 567 case DWT.ARROW_RIGHT: | |
| 568 validateContextInformation(); | |
| 569 break; | |
| 570 default: | |
| 571 if (e.keyCode !is DWT.MOD1 && e.keyCode !is DWT.MOD2 && e.keyCode !is DWT.MOD3 && e.keyCode !is DWT.MOD4) | |
| 572 hideContextInfoPopup(); | |
| 573 break; | |
| 574 } | |
| 575 | |
| 576 } else if (key is DWT.ESC) { | |
| 577 e.doit= false; | |
| 578 hideContextInfoPopup(); | |
| 579 } else { | |
| 580 validateContextInformation(); | |
| 581 } | |
| 582 return true; | |
| 583 } | |
| 584 | |
| 585 /* | |
| 586 * @see IEventConsumer#processEvent(VerifyEvent) | |
| 587 */ | |
| 588 public void processEvent(VerifyEvent event) { | |
| 589 if (Helper2.okToUse(fContextSelectorShell)) | |
| 590 contextSelectorProcessEvent(event); | |
| 591 if (Helper2.okToUse(fContextInfoPopup)) | |
| 592 contextInfoPopupProcessEvent(event); | |
| 593 } | |
| 594 | |
| 595 /** | |
| 596 * Processes a key stroke in the context selector. | |
| 597 * | |
| 598 * @param e the verify event describing the key stroke | |
| 599 */ | |
| 600 private void contextSelectorProcessEvent(VerifyEvent e) { | |
| 601 | |
| 602 if (e.start is e.end && e.text !is null && e.text.equals(fLineDelimiter)) { | |
| 603 e.doit= false; | |
| 604 insertSelectedContext(); | |
| 605 } | |
| 606 | |
| 607 hideContextSelector(); | |
| 608 } | |
| 609 | |
| 610 /** | |
| 611 * Processes a key stroke while the info popup is up. | |
| 612 * | |
| 613 * @param e the verify event describing the key stroke | |
| 614 */ | |
| 615 private void contextInfoPopupProcessEvent(VerifyEvent e) { | |
| 616 if (e.start !is e.end && (e.text is null || e.text.length() is 0)) | |
| 617 validateContextInformation(); | |
| 618 } | |
| 619 | |
| 620 /** | |
| 621 * Validates the context information for the viewer's actual cursor position. | |
| 622 */ | |
| 623 private void validateContextInformation() { | |
| 624 /* | |
| 625 * Post the code in the event queue in order to ensure that the | |
| 626 * action described by this verify key event has already beed executed. | |
| 627 * Otherwise, we'd validate the context information based on the | |
| 628 * pre-key-stroke state. | |
| 629 */ | |
| 135 | 630 fContextInfoPopup.getDisplay().asyncExec(new class() Runnable { |
| 129 | 631 |
| 134 | 632 private ContextFrame fFrame= cast(ContextFrame) fContextFrameStack.peek(); |
| 129 | 633 |
| 634 public void run() { | |
| 635 if (Helper2.okToUse(fContextInfoPopup) && fFrame is fContextFrameStack.peek()) { | |
| 636 int offset= fViewer.getSelectedRange().x; | |
| 637 if (fFrame.fValidator is null || !fFrame.fValidator.isContextInformationValid(offset)) { | |
| 638 hideContextInfoPopup(); | |
| 639 } else if (fFrame.fPresenter !is null && fFrame.fPresenter.updatePresentation(offset, fTextPresentation)) { | |
| 640 TextPresentation.applyTextPresentation(fTextPresentation, fContextInfoText); | |
| 641 resize(); | |
| 642 } | |
| 643 } | |
| 644 } | |
| 645 }); | |
| 646 } | |
| 647 } |