J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | package javax.swing.text; |
| 26 | |
| 27 | import java.awt.*; |
| 28 | import java.awt.event.*; |
| 29 | import java.awt.datatransfer.*; |
| 30 | import java.beans.*; |
| 31 | import java.awt.event.ActionEvent; |
| 32 | import java.awt.event.ActionListener; |
| 33 | import java.io.*; |
| 34 | import javax.swing.*; |
| 35 | import javax.swing.event.*; |
| 36 | import javax.swing.plaf.*; |
| 37 | import java.util.EventListener; |
| 38 | import sun.swing.SwingUtilities2; |
| 39 | |
| 40 | /** |
| 41 | * A default implementation of Caret. The caret is rendered as |
| 42 | * a vertical line in the color specified by the CaretColor property |
| 43 | * of the associated JTextComponent. It can blink at the rate specified |
| 44 | * by the BlinkRate property. |
| 45 | * <p> |
| 46 | * This implementation expects two sources of asynchronous notification. |
| 47 | * The timer thread fires asynchronously, and causes the caret to simply |
| 48 | * repaint the most recent bounding box. The caret also tracks change |
| 49 | * as the document is modified. Typically this will happen on the |
| 50 | * event dispatch thread as a result of some mouse or keyboard event. |
| 51 | * The caret behavior on both synchronous and asynchronous documents updates |
| 52 | * is controlled by <code>UpdatePolicy</code> property. The repaint of the |
| 53 | * new caret location will occur on the event thread in any case, as calls to |
| 54 | * <code>modelToView</code> are only safe on the event thread. |
| 55 | * <p> |
| 56 | * The caret acts as a mouse and focus listener on the text component |
| 57 | * it has been installed in, and defines the caret semantics based upon |
| 58 | * those events. The listener methods can be reimplemented to change the |
| 59 | * semantics. |
| 60 | * By default, the first mouse button will be used to set focus and caret |
| 61 | * position. Dragging the mouse pointer with the first mouse button will |
| 62 | * sweep out a selection that is contiguous in the model. If the associated |
| 63 | * text component is editable, the caret will become visible when focus |
| 64 | * is gained, and invisible when focus is lost. |
| 65 | * <p> |
| 66 | * The Highlighter bound to the associated text component is used to |
| 67 | * render the selection by default. |
| 68 | * Selection appearance can be customized by supplying a |
| 69 | * painter to use for the highlights. By default a painter is used that |
| 70 | * will render a solid color as specified in the associated text component |
| 71 | * in the <code>SelectionColor</code> property. This can easily be changed |
| 72 | * by reimplementing the |
| 73 | * <a href="#getSelectionHighlighter">getSelectionHighlighter</a> |
| 74 | * method. |
| 75 | * <p> |
| 76 | * A customized caret appearance can be achieved by reimplementing |
| 77 | * the paint method. If the paint method is changed, the damage method |
| 78 | * should also be reimplemented to cause a repaint for the area needed |
| 79 | * to render the caret. The caret extends the Rectangle class which |
| 80 | * is used to hold the bounding box for where the caret was last rendered. |
| 81 | * This enables the caret to repaint in a thread-safe manner when the |
| 82 | * caret moves without making a call to modelToView which is unstable |
| 83 | * between model updates and view repair (i.e. the order of delivery |
| 84 | * to DocumentListeners is not guaranteed). |
| 85 | * <p> |
| 86 | * The magic caret position is set to null when the caret position changes. |
| 87 | * A timer is used to determine the new location (after the caret change). |
| 88 | * When the timer fires, if the magic caret position is still null it is |
| 89 | * reset to the current caret position. Any actions that change |
| 90 | * the caret position and want the magic caret position to remain the |
| 91 | * same, must remember the magic caret position, change the cursor, and |
| 92 | * then set the magic caret position to its original value. This has the |
| 93 | * benefit that only actions that want the magic caret position to persist |
| 94 | * (such as open/down) need to know about it. |
| 95 | * <p> |
| 96 | * <strong>Warning:</strong> |
| 97 | * Serialized objects of this class will not be compatible with |
| 98 | * future Swing releases. The current serialization support is |
| 99 | * appropriate for short term storage or RMI between applications running |
| 100 | * the same version of Swing. As of 1.4, support for long term storage |
| 101 | * of all JavaBeans<sup><font size="-2">TM</font></sup> |
| 102 | * has been added to the <code>java.beans</code> package. |
| 103 | * Please see {@link java.beans.XMLEncoder}. |
| 104 | * |
| 105 | * @author Timothy Prinzing |
| 106 | * @see Caret |
| 107 | */ |
| 108 | public class DefaultCaret extends Rectangle implements Caret, FocusListener, MouseListener, MouseMotionListener { |
| 109 | |
| 110 | /** |
| 111 | * Indicates that the caret position is to be updated only when |
| 112 | * document changes are performed on the Event Dispatching Thread. |
| 113 | * @see #setUpdatePolicy |
| 114 | * @see #getUpdatePolicy |
| 115 | * @since 1.5 |
| 116 | */ |
| 117 | public static final int UPDATE_WHEN_ON_EDT = 0; |
| 118 | |
| 119 | /** |
| 120 | * Indicates that the caret should remain at the same |
| 121 | * absolute position in the document regardless of any document |
| 122 | * updates, except when the document length becomes less than |
| 123 | * the current caret position due to removal. In that case the caret |
| 124 | * position is adjusted to the end of the document. |
| 125 | * |
| 126 | * @see #setUpdatePolicy |
| 127 | * @see #getUpdatePolicy |
| 128 | * @since 1.5 |
| 129 | */ |
| 130 | public static final int NEVER_UPDATE = 1; |
| 131 | |
| 132 | /** |
| 133 | * Indicates that the caret position is to be <b>always</b> |
| 134 | * updated accordingly to the document changes regardless whether |
| 135 | * the document updates are performed on the Event Dispatching Thread |
| 136 | * or not. |
| 137 | * |
| 138 | * @see #setUpdatePolicy |
| 139 | * @see #getUpdatePolicy |
| 140 | * @since 1.5 |
| 141 | */ |
| 142 | public static final int ALWAYS_UPDATE = 2; |
| 143 | |
| 144 | /** |
| 145 | * Constructs a default caret. |
| 146 | */ |
| 147 | public DefaultCaret() { |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Sets the caret movement policy on the document updates. Normally |
| 152 | * the caret updates its absolute position within the document on |
| 153 | * insertions occurred before or at the caret position and |
| 154 | * on removals before the caret position. 'Absolute position' |
| 155 | * means here the position relative to the start of the document. |
| 156 | * For example if |
| 157 | * a character is typed within editable text component it is inserted |
| 158 | * at the caret position and the caret moves to the next absolute |
| 159 | * position within the document due to insertion and if |
| 160 | * <code>BACKSPACE</code> is typed then caret decreases its absolute |
| 161 | * position due to removal of a character before it. Sometimes |
| 162 | * it may be useful to turn off the caret position updates so that |
| 163 | * the caret stays at the same absolute position within the |
| 164 | * document position regardless of any document updates. |
| 165 | * <p> |
| 166 | * The following update policies are allowed: |
| 167 | * <ul> |
| 168 | * <li><code>NEVER_UPDATE</code>: the caret stays at the same |
| 169 | * absolute position in the document regardless of any document |
| 170 | * updates, except when document length becomes less than |
| 171 | * the current caret position due to removal. In that case caret |
| 172 | * position is adjusted to the end of the document. |
| 173 | * The caret doesn't try to keep itself visible by scrolling |
| 174 | * the associated view when using this policy. </li> |
| 175 | * <li><code>ALWAYS_UPDATE</code>: the caret always tracks document |
| 176 | * changes. For regular changes it increases its position |
| 177 | * if an insertion occurs before or at its current position, |
| 178 | * and decreases position if a removal occurs before |
| 179 | * its current position. For undo/redo updates it is always |
| 180 | * moved to the position where update occurred. The caret |
| 181 | * also tries to keep itself visible by calling |
| 182 | * <code>adjustVisibility</code> method.</li> |
| 183 | * <li><code>UPDATE_WHEN_ON_EDT</code>: acts like <code>ALWAYS_UPDATE</code> |
| 184 | * if the document updates are performed on the Event Dispatching Thread |
| 185 | * and like <code>NEVER_UPDATE</code> if updates are performed on |
| 186 | * other thread. </li> |
| 187 | * </ul> <p> |
| 188 | * The default property value is <code>UPDATE_WHEN_ON_EDT</code>. |
| 189 | * |
| 190 | * @param policy one of the following values : <code>UPDATE_WHEN_ON_EDT</code>, |
| 191 | * <code>NEVER_UPDATE</code>, <code>ALWAYS_UPDATE</code> |
| 192 | * @throws IllegalArgumentException if invalid value is passed |
| 193 | * |
| 194 | * @see #getUpdatePolicy |
| 195 | * @see #adjustVisibility |
| 196 | * @see #UPDATE_WHEN_ON_EDT |
| 197 | * @see #NEVER_UPDATE |
| 198 | * @see #ALWAYS_UPDATE |
| 199 | * |
| 200 | * @since 1.5 |
| 201 | */ |
| 202 | public void setUpdatePolicy(int policy) { |
| 203 | updatePolicy = policy; |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * Gets the caret movement policy on document updates. |
| 208 | * |
| 209 | * @return one of the following values : <code>UPDATE_WHEN_ON_EDT</code>, |
| 210 | * <code>NEVER_UPDATE</code>, <code>ALWAYS_UPDATE</code> |
| 211 | * |
| 212 | * @see #setUpdatePolicy |
| 213 | * @see #UPDATE_WHEN_ON_EDT |
| 214 | * @see #NEVER_UPDATE |
| 215 | * @see #ALWAYS_UPDATE |
| 216 | * |
| 217 | * @since 1.5 |
| 218 | */ |
| 219 | public int getUpdatePolicy() { |
| 220 | return updatePolicy; |
| 221 | } |
| 222 | |
| 223 | /** |
| 224 | * Gets the text editor component that this caret is |
| 225 | * is bound to. |
| 226 | * |
| 227 | * @return the component |
| 228 | */ |
| 229 | protected final JTextComponent getComponent() { |
| 230 | return component; |
| 231 | } |
| 232 | |
| 233 | /** |
| 234 | * Cause the caret to be painted. The repaint |
| 235 | * area is the bounding box of the caret (i.e. |
| 236 | * the caret rectangle or <em>this</em>). |
| 237 | * <p> |
| 238 | * This method is thread safe, although most Swing methods |
| 239 | * are not. Please see |
| 240 | * <A HREF="http://java.sun.com/docs/books/tutorial/uiswing/misc/threads.html">How |
| 241 | * to Use Threads</A> for more information. |
| 242 | */ |
| 243 | protected final synchronized void repaint() { |
| 244 | if (component != null) { |
| 245 | component.repaint(x, y, width, height); |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Damages the area surrounding the caret to cause |
| 251 | * it to be repainted in a new location. If paint() |
| 252 | * is reimplemented, this method should also be |
| 253 | * reimplemented. This method should update the |
| 254 | * caret bounds (x, y, width, and height). |
| 255 | * |
| 256 | * @param r the current location of the caret |
| 257 | * @see #paint |
| 258 | */ |
| 259 | protected synchronized void damage(Rectangle r) { |
| 260 | if (r != null) { |
| 261 | int damageWidth = getCaretWidth(r.height); |
| 262 | x = r.x - 4 - (damageWidth >> 1); |
| 263 | y = r.y; |
| 264 | width = 9 + damageWidth; |
| 265 | height = r.height; |
| 266 | repaint(); |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | /** |
| 271 | * Scrolls the associated view (if necessary) to make |
| 272 | * the caret visible. Since how this should be done |
| 273 | * is somewhat of a policy, this method can be |
| 274 | * reimplemented to change the behavior. By default |
| 275 | * the scrollRectToVisible method is called on the |
| 276 | * associated component. |
| 277 | * |
| 278 | * @param nloc the new position to scroll to |
| 279 | */ |
| 280 | protected void adjustVisibility(Rectangle nloc) { |
| 281 | if(component == null) { |
| 282 | return; |
| 283 | } |
| 284 | if (SwingUtilities.isEventDispatchThread()) { |
| 285 | component.scrollRectToVisible(nloc); |
| 286 | } else { |
| 287 | SwingUtilities.invokeLater(new SafeScroller(nloc)); |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | /** |
| 292 | * Gets the painter for the Highlighter. |
| 293 | * |
| 294 | * @return the painter |
| 295 | */ |
| 296 | protected Highlighter.HighlightPainter getSelectionPainter() { |
| 297 | return DefaultHighlighter.DefaultPainter; |
| 298 | } |
| 299 | |
| 300 | /** |
| 301 | * Tries to set the position of the caret from |
| 302 | * the coordinates of a mouse event, using viewToModel(). |
| 303 | * |
| 304 | * @param e the mouse event |
| 305 | */ |
| 306 | protected void positionCaret(MouseEvent e) { |
| 307 | Point pt = new Point(e.getX(), e.getY()); |
| 308 | Position.Bias[] biasRet = new Position.Bias[1]; |
| 309 | int pos = component.getUI().viewToModel(component, pt, biasRet); |
| 310 | if(biasRet[0] == null) |
| 311 | biasRet[0] = Position.Bias.Forward; |
| 312 | if (pos >= 0) { |
| 313 | setDot(pos, biasRet[0]); |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | /** |
| 318 | * Tries to move the position of the caret from |
| 319 | * the coordinates of a mouse event, using viewToModel(). |
| 320 | * This will cause a selection if the dot and mark |
| 321 | * are different. |
| 322 | * |
| 323 | * @param e the mouse event |
| 324 | */ |
| 325 | protected void moveCaret(MouseEvent e) { |
| 326 | Point pt = new Point(e.getX(), e.getY()); |
| 327 | Position.Bias[] biasRet = new Position.Bias[1]; |
| 328 | int pos = component.getUI().viewToModel(component, pt, biasRet); |
| 329 | if(biasRet[0] == null) |
| 330 | biasRet[0] = Position.Bias.Forward; |
| 331 | if (pos >= 0) { |
| 332 | moveDot(pos, biasRet[0]); |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | // --- FocusListener methods -------------------------- |
| 337 | |
| 338 | /** |
| 339 | * Called when the component containing the caret gains |
| 340 | * focus. This is implemented to set the caret to visible |
| 341 | * if the component is editable. |
| 342 | * |
| 343 | * @param e the focus event |
| 344 | * @see FocusListener#focusGained |
| 345 | */ |
| 346 | public void focusGained(FocusEvent e) { |
| 347 | if (component.isEnabled()) { |
| 348 | if (component.isEditable()) { |
| 349 | setVisible(true); |
| 350 | } |
| 351 | setSelectionVisible(true); |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | /** |
| 356 | * Called when the component containing the caret loses |
| 357 | * focus. This is implemented to set the caret to visibility |
| 358 | * to false. |
| 359 | * |
| 360 | * @param e the focus event |
| 361 | * @see FocusListener#focusLost |
| 362 | */ |
| 363 | public void focusLost(FocusEvent e) { |
| 364 | setVisible(false); |
| 365 | setSelectionVisible(ownsSelection || e.isTemporary()); |
| 366 | } |
| 367 | |
| 368 | |
| 369 | /** |
| 370 | * Selects word based on the MouseEvent |
| 371 | */ |
| 372 | private void selectWord(MouseEvent e) { |
| 373 | if (selectedWordEvent != null |
| 374 | && selectedWordEvent.getX() == e.getX() |
| 375 | && selectedWordEvent.getY() == e.getY()) { |
| 376 | //we already done selection for this |
| 377 | return; |
| 378 | } |
| 379 | Action a = null; |
| 380 | ActionMap map = getComponent().getActionMap(); |
| 381 | if (map != null) { |
| 382 | a = map.get(DefaultEditorKit.selectWordAction); |
| 383 | } |
| 384 | if (a == null) { |
| 385 | if (selectWord == null) { |
| 386 | selectWord = new DefaultEditorKit.SelectWordAction(); |
| 387 | } |
| 388 | a = selectWord; |
| 389 | } |
| 390 | a.actionPerformed(new ActionEvent(getComponent(), |
| 391 | ActionEvent.ACTION_PERFORMED, null, e.getWhen(), e.getModifiers())); |
| 392 | selectedWordEvent = e; |
| 393 | } |
| 394 | |
| 395 | // --- MouseListener methods ----------------------------------- |
| 396 | |
| 397 | /** |
| 398 | * Called when the mouse is clicked. If the click was generated |
| 399 | * from button1, a double click selects a word, |
| 400 | * and a triple click the current line. |
| 401 | * |
| 402 | * @param e the mouse event |
| 403 | * @see MouseListener#mouseClicked |
| 404 | */ |
| 405 | public void mouseClicked(MouseEvent e) { |
| 406 | int nclicks = SwingUtilities2.getAdjustedClickCount(getComponent(), e); |
| 407 | |
| 408 | if (! e.isConsumed()) { |
| 409 | if (SwingUtilities.isLeftMouseButton(e)) { |
| 410 | // mouse 1 behavior |
| 411 | if(nclicks == 1) { |
| 412 | selectedWordEvent = null; |
| 413 | } else if(nclicks == 2 |
| 414 | && SwingUtilities2.canEventAccessSystemClipboard(e)) { |
| 415 | selectWord(e); |
| 416 | selectedWordEvent = null; |
| 417 | } else if(nclicks == 3 |
| 418 | && SwingUtilities2.canEventAccessSystemClipboard(e)) { |
| 419 | Action a = null; |
| 420 | ActionMap map = getComponent().getActionMap(); |
| 421 | if (map != null) { |
| 422 | a = map.get(DefaultEditorKit.selectLineAction); |
| 423 | } |
| 424 | if (a == null) { |
| 425 | if (selectLine == null) { |
| 426 | selectLine = new DefaultEditorKit.SelectLineAction(); |
| 427 | } |
| 428 | a = selectLine; |
| 429 | } |
| 430 | a.actionPerformed(new ActionEvent(getComponent(), |
| 431 | ActionEvent.ACTION_PERFORMED, null, e.getWhen(), e.getModifiers())); |
| 432 | } |
| 433 | } else if (SwingUtilities.isMiddleMouseButton(e)) { |
| 434 | // mouse 2 behavior |
| 435 | if (nclicks == 1 && component.isEditable() && component.isEnabled() |
| 436 | && SwingUtilities2.canEventAccessSystemClipboard(e)) { |
| 437 | // paste system selection, if it exists |
| 438 | JTextComponent c = (JTextComponent) e.getSource(); |
| 439 | if (c != null) { |
| 440 | try { |
| 441 | Toolkit tk = c.getToolkit(); |
| 442 | Clipboard buffer = tk.getSystemSelection(); |
| 443 | if (buffer != null) { |
| 444 | // platform supports system selections, update it. |
| 445 | adjustCaret(e); |
| 446 | TransferHandler th = c.getTransferHandler(); |
| 447 | if (th != null) { |
| 448 | Transferable trans = null; |
| 449 | |
| 450 | try { |
| 451 | trans = buffer.getContents(null); |
| 452 | } catch (IllegalStateException ise) { |
| 453 | // clipboard was unavailable |
| 454 | UIManager.getLookAndFeel().provideErrorFeedback(c); |
| 455 | } |
| 456 | |
| 457 | if (trans != null) { |
| 458 | th.importData(c, trans); |
| 459 | } |
| 460 | } |
| 461 | adjustFocus(true); |
| 462 | } |
| 463 | } catch (HeadlessException he) { |
| 464 | // do nothing... there is no system clipboard |
| 465 | } |
| 466 | } |
| 467 | } |
| 468 | } |
| 469 | } |
| 470 | } |
| 471 | |
| 472 | /** |
| 473 | * If button 1 is pressed, this is implemented to |
| 474 | * request focus on the associated text component, |
| 475 | * and to set the caret position. If the shift key is held down, |
| 476 | * the caret will be moved, potentially resulting in a selection, |
| 477 | * otherwise the |
| 478 | * caret position will be set to the new location. If the component |
| 479 | * is not enabled, there will be no request for focus. |
| 480 | * |
| 481 | * @param e the mouse event |
| 482 | * @see MouseListener#mousePressed |
| 483 | */ |
| 484 | public void mousePressed(MouseEvent e) { |
| 485 | int nclicks = SwingUtilities2.getAdjustedClickCount(getComponent(), e); |
| 486 | |
| 487 | if (SwingUtilities.isLeftMouseButton(e)) { |
| 488 | if (e.isConsumed()) { |
| 489 | shouldHandleRelease = true; |
| 490 | } else { |
| 491 | shouldHandleRelease = false; |
| 492 | adjustCaretAndFocus(e); |
| 493 | if (nclicks == 2 |
| 494 | && SwingUtilities2.canEventAccessSystemClipboard(e)) { |
| 495 | selectWord(e); |
| 496 | } |
| 497 | } |
| 498 | } |
| 499 | } |
| 500 | |
| 501 | void adjustCaretAndFocus(MouseEvent e) { |
| 502 | adjustCaret(e); |
| 503 | adjustFocus(false); |
| 504 | } |
| 505 | |
| 506 | /** |
| 507 | * Adjusts the caret location based on the MouseEvent. |
| 508 | */ |
| 509 | private void adjustCaret(MouseEvent e) { |
| 510 | if ((e.getModifiers() & ActionEvent.SHIFT_MASK) != 0 && |
| 511 | getDot() != -1) { |
| 512 | moveCaret(e); |
| 513 | } else { |
| 514 | positionCaret(e); |
| 515 | } |
| 516 | } |
| 517 | |
| 518 | /** |
| 519 | * Adjusts the focus, if necessary. |
| 520 | * |
| 521 | * @param inWindow if true indicates requestFocusInWindow should be used |
| 522 | */ |
| 523 | private void adjustFocus(boolean inWindow) { |
| 524 | if ((component != null) && component.isEnabled() && |
| 525 | component.isRequestFocusEnabled()) { |
| 526 | if (inWindow) { |
| 527 | component.requestFocusInWindow(); |
| 528 | } |
| 529 | else { |
| 530 | component.requestFocus(); |
| 531 | } |
| 532 | } |
| 533 | } |
| 534 | |
| 535 | /** |
| 536 | * Called when the mouse is released. |
| 537 | * |
| 538 | * @param e the mouse event |
| 539 | * @see MouseListener#mouseReleased |
| 540 | */ |
| 541 | public void mouseReleased(MouseEvent e) { |
| 542 | if (!e.isConsumed() |
| 543 | && shouldHandleRelease |
| 544 | && SwingUtilities.isLeftMouseButton(e)) { |
| 545 | |
| 546 | adjustCaretAndFocus(e); |
| 547 | } |
| 548 | } |
| 549 | |
| 550 | /** |
| 551 | * Called when the mouse enters a region. |
| 552 | * |
| 553 | * @param e the mouse event |
| 554 | * @see MouseListener#mouseEntered |
| 555 | */ |
| 556 | public void mouseEntered(MouseEvent e) { |
| 557 | } |
| 558 | |
| 559 | /** |
| 560 | * Called when the mouse exits a region. |
| 561 | * |
| 562 | * @param e the mouse event |
| 563 | * @see MouseListener#mouseExited |
| 564 | */ |
| 565 | public void mouseExited(MouseEvent e) { |
| 566 | } |
| 567 | |
| 568 | // --- MouseMotionListener methods ------------------------- |
| 569 | |
| 570 | /** |
| 571 | * Moves the caret position |
| 572 | * according to the mouse pointer's current |
| 573 | * location. This effectively extends the |
| 574 | * selection. By default, this is only done |
| 575 | * for mouse button 1. |
| 576 | * |
| 577 | * @param e the mouse event |
| 578 | * @see MouseMotionListener#mouseDragged |
| 579 | */ |
| 580 | public void mouseDragged(MouseEvent e) { |
| 581 | if ((! e.isConsumed()) && SwingUtilities.isLeftMouseButton(e)) { |
| 582 | moveCaret(e); |
| 583 | } |
| 584 | } |
| 585 | |
| 586 | /** |
| 587 | * Called when the mouse is moved. |
| 588 | * |
| 589 | * @param e the mouse event |
| 590 | * @see MouseMotionListener#mouseMoved |
| 591 | */ |
| 592 | public void mouseMoved(MouseEvent e) { |
| 593 | } |
| 594 | |
| 595 | // ---- Caret methods --------------------------------- |
| 596 | |
| 597 | /** |
| 598 | * Renders the caret as a vertical line. If this is reimplemented |
| 599 | * the damage method should also be reimplemented as it assumes the |
| 600 | * shape of the caret is a vertical line. Sets the caret color to |
| 601 | * the value returned by getCaretColor(). |
| 602 | * <p> |
| 603 | * If there are multiple text directions present in the associated |
| 604 | * document, a flag indicating the caret bias will be rendered. |
| 605 | * This will occur only if the associated document is a subclass |
| 606 | * of AbstractDocument and there are multiple bidi levels present |
| 607 | * in the bidi element structure (i.e. the text has multiple |
| 608 | * directions associated with it). |
| 609 | * |
| 610 | * @param g the graphics context |
| 611 | * @see #damage |
| 612 | */ |
| 613 | public void paint(Graphics g) { |
| 614 | if(isVisible()) { |
| 615 | try { |
| 616 | TextUI mapper = component.getUI(); |
| 617 | Rectangle r = mapper.modelToView(component, dot, dotBias); |
| 618 | |
| 619 | if ((r == null) || ((r.width == 0) && (r.height == 0))) { |
| 620 | return; |
| 621 | } |
| 622 | if (width > 0 && height > 0 && |
| 623 | !this._contains(r.x, r.y, r.width, r.height)) { |
| 624 | // We seem to have gotten out of sync and no longer |
| 625 | // contain the right location, adjust accordingly. |
| 626 | Rectangle clip = g.getClipBounds(); |
| 627 | |
| 628 | if (clip != null && !clip.contains(this)) { |
| 629 | // Clip doesn't contain the old location, force it |
| 630 | // to be repainted lest we leave a caret around. |
| 631 | repaint(); |
| 632 | } |
| 633 | // This will potentially cause a repaint of something |
| 634 | // we're already repainting, but without changing the |
| 635 | // semantics of damage we can't really get around this. |
| 636 | damage(r); |
| 637 | } |
| 638 | g.setColor(component.getCaretColor()); |
| 639 | int paintWidth = getCaretWidth(r.height); |
| 640 | r.x -= paintWidth >> 1; |
| 641 | g.fillRect(r.x, r.y, paintWidth, r.height); |
| 642 | |
| 643 | // see if we should paint a flag to indicate the bias |
| 644 | // of the caret. |
| 645 | // PENDING(prinz) this should be done through |
| 646 | // protected methods so that alternative LAF |
| 647 | // will show bidi information. |
| 648 | Document doc = component.getDocument(); |
| 649 | if (doc instanceof AbstractDocument) { |
| 650 | Element bidi = ((AbstractDocument)doc).getBidiRootElement(); |
| 651 | if ((bidi != null) && (bidi.getElementCount() > 1)) { |
| 652 | // there are multiple directions present. |
| 653 | flagXPoints[0] = r.x + ((dotLTR) ? paintWidth : 0); |
| 654 | flagYPoints[0] = r.y; |
| 655 | flagXPoints[1] = flagXPoints[0]; |
| 656 | flagYPoints[1] = flagYPoints[0] + 4; |
| 657 | flagXPoints[2] = flagXPoints[0] + ((dotLTR) ? 4 : -4); |
| 658 | flagYPoints[2] = flagYPoints[0]; |
| 659 | g.fillPolygon(flagXPoints, flagYPoints, 3); |
| 660 | } |
| 661 | } |
| 662 | } catch (BadLocationException e) { |
| 663 | // can't render I guess |
| 664 | //System.err.println("Can't render cursor"); |
| 665 | } |
| 666 | } |
| 667 | } |
| 668 | |
| 669 | /** |
| 670 | * Called when the UI is being installed into the |
| 671 | * interface of a JTextComponent. This can be used |
| 672 | * to gain access to the model that is being navigated |
| 673 | * by the implementation of this interface. Sets the dot |
| 674 | * and mark to 0, and establishes document, property change, |
| 675 | * focus, mouse, and mouse motion listeners. |
| 676 | * |
| 677 | * @param c the component |
| 678 | * @see Caret#install |
| 679 | */ |
| 680 | public void install(JTextComponent c) { |
| 681 | component = c; |
| 682 | Document doc = c.getDocument(); |
| 683 | dot = mark = 0; |
| 684 | dotLTR = markLTR = true; |
| 685 | dotBias = markBias = Position.Bias.Forward; |
| 686 | if (doc != null) { |
| 687 | doc.addDocumentListener(handler); |
| 688 | } |
| 689 | c.addPropertyChangeListener(handler); |
| 690 | c.addFocusListener(this); |
| 691 | c.addMouseListener(this); |
| 692 | c.addMouseMotionListener(this); |
| 693 | |
| 694 | // if the component already has focus, it won't |
| 695 | // be notified. |
| 696 | if (component.hasFocus()) { |
| 697 | focusGained(null); |
| 698 | } |
| 699 | |
| 700 | Number ratio = (Number) c.getClientProperty("caretAspectRatio"); |
| 701 | if (ratio != null) { |
| 702 | aspectRatio = ratio.floatValue(); |
| 703 | } else { |
| 704 | aspectRatio = -1; |
| 705 | } |
| 706 | |
| 707 | Integer width = (Integer) c.getClientProperty("caretWidth"); |
| 708 | if (width != null) { |
| 709 | caretWidth = width.intValue(); |
| 710 | } else { |
| 711 | caretWidth = -1; |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | /** |
| 716 | * Called when the UI is being removed from the |
| 717 | * interface of a JTextComponent. This is used to |
| 718 | * unregister any listeners that were attached. |
| 719 | * |
| 720 | * @param c the component |
| 721 | * @see Caret#deinstall |
| 722 | */ |
| 723 | public void deinstall(JTextComponent c) { |
| 724 | c.removeMouseListener(this); |
| 725 | c.removeMouseMotionListener(this); |
| 726 | c.removeFocusListener(this); |
| 727 | c.removePropertyChangeListener(handler); |
| 728 | Document doc = c.getDocument(); |
| 729 | if (doc != null) { |
| 730 | doc.removeDocumentListener(handler); |
| 731 | } |
| 732 | synchronized(this) { |
| 733 | component = null; |
| 734 | } |
| 735 | if (flasher != null) { |
| 736 | flasher.stop(); |
| 737 | } |
| 738 | |
| 739 | |
| 740 | } |
| 741 | |
| 742 | /** |
| 743 | * Adds a listener to track whenever the caret position has |
| 744 | * been changed. |
| 745 | * |
| 746 | * @param l the listener |
| 747 | * @see Caret#addChangeListener |
| 748 | */ |
| 749 | public void addChangeListener(ChangeListener l) { |
| 750 | listenerList.add(ChangeListener.class, l); |
| 751 | } |
| 752 | |
| 753 | /** |
| 754 | * Removes a listener that was tracking caret position changes. |
| 755 | * |
| 756 | * @param l the listener |
| 757 | * @see Caret#removeChangeListener |
| 758 | */ |
| 759 | public void removeChangeListener(ChangeListener l) { |
| 760 | listenerList.remove(ChangeListener.class, l); |
| 761 | } |
| 762 | |
| 763 | /** |
| 764 | * Returns an array of all the change listeners |
| 765 | * registered on this caret. |
| 766 | * |
| 767 | * @return all of this caret's <code>ChangeListener</code>s |
| 768 | * or an empty |
| 769 | * array if no change listeners are currently registered |
| 770 | * |
| 771 | * @see #addChangeListener |
| 772 | * @see #removeChangeListener |
| 773 | * |
| 774 | * @since 1.4 |
| 775 | */ |
| 776 | public ChangeListener[] getChangeListeners() { |
| 777 | return (ChangeListener[])listenerList.getListeners( |
| 778 | ChangeListener.class); |
| 779 | } |
| 780 | |
| 781 | /** |
| 782 | * Notifies all listeners that have registered interest for |
| 783 | * notification on this event type. The event instance |
| 784 | * is lazily created using the parameters passed into |
| 785 | * the fire method. The listener list is processed last to first. |
| 786 | * |
| 787 | * @see EventListenerList |
| 788 | */ |
| 789 | protected void fireStateChanged() { |
| 790 | // Guaranteed to return a non-null array |
| 791 | Object[] listeners = listenerList.getListenerList(); |
| 792 | // Process the listeners last to first, notifying |
| 793 | // those that are interested in this event |
| 794 | for (int i = listeners.length-2; i>=0; i-=2) { |
| 795 | if (listeners[i]==ChangeListener.class) { |
| 796 | // Lazily create the event: |
| 797 | if (changeEvent == null) |
| 798 | changeEvent = new ChangeEvent(this); |
| 799 | ((ChangeListener)listeners[i+1]).stateChanged(changeEvent); |
| 800 | } |
| 801 | } |
| 802 | } |
| 803 | |
| 804 | /** |
| 805 | * Returns an array of all the objects currently registered |
| 806 | * as <code><em>Foo</em>Listener</code>s |
| 807 | * upon this caret. |
| 808 | * <code><em>Foo</em>Listener</code>s are registered using the |
| 809 | * <code>add<em>Foo</em>Listener</code> method. |
| 810 | * |
| 811 | * <p> |
| 812 | * |
| 813 | * You can specify the <code>listenerType</code> argument |
| 814 | * with a class literal, |
| 815 | * such as |
| 816 | * <code><em>Foo</em>Listener.class</code>. |
| 817 | * For example, you can query a |
| 818 | * <code>DefaultCaret</code> <code>c</code> |
| 819 | * for its change listeners with the following code: |
| 820 | * |
| 821 | * <pre>ChangeListener[] cls = (ChangeListener[])(c.getListeners(ChangeListener.class));</pre> |
| 822 | * |
| 823 | * If no such listeners exist, this method returns an empty array. |
| 824 | * |
| 825 | * @param listenerType the type of listeners requested; this parameter |
| 826 | * should specify an interface that descends from |
| 827 | * <code>java.util.EventListener</code> |
| 828 | * @return an array of all objects registered as |
| 829 | * <code><em>Foo</em>Listener</code>s on this component, |
| 830 | * or an empty array if no such |
| 831 | * listeners have been added |
| 832 | * @exception ClassCastException if <code>listenerType</code> |
| 833 | * doesn't specify a class or interface that implements |
| 834 | * <code>java.util.EventListener</code> |
| 835 | * |
| 836 | * @see #getChangeListeners |
| 837 | * |
| 838 | * @since 1.3 |
| 839 | */ |
| 840 | public <T extends EventListener> T[] getListeners(Class<T> listenerType) { |
| 841 | return listenerList.getListeners(listenerType); |
| 842 | } |
| 843 | |
| 844 | /** |
| 845 | * Changes the selection visibility. |
| 846 | * |
| 847 | * @param vis the new visibility |
| 848 | */ |
| 849 | public void setSelectionVisible(boolean vis) { |
| 850 | if (vis != selectionVisible) { |
| 851 | selectionVisible = vis; |
| 852 | if (selectionVisible) { |
| 853 | // show |
| 854 | Highlighter h = component.getHighlighter(); |
| 855 | if ((dot != mark) && (h != null) && (selectionTag == null)) { |
| 856 | int p0 = Math.min(dot, mark); |
| 857 | int p1 = Math.max(dot, mark); |
| 858 | Highlighter.HighlightPainter p = getSelectionPainter(); |
| 859 | try { |
| 860 | selectionTag = h.addHighlight(p0, p1, p); |
| 861 | } catch (BadLocationException bl) { |
| 862 | selectionTag = null; |
| 863 | } |
| 864 | } |
| 865 | } else { |
| 866 | // hide |
| 867 | if (selectionTag != null) { |
| 868 | Highlighter h = component.getHighlighter(); |
| 869 | h.removeHighlight(selectionTag); |
| 870 | selectionTag = null; |
| 871 | } |
| 872 | } |
| 873 | } |
| 874 | } |
| 875 | |
| 876 | /** |
| 877 | * Checks whether the current selection is visible. |
| 878 | * |
| 879 | * @return true if the selection is visible |
| 880 | */ |
| 881 | public boolean isSelectionVisible() { |
| 882 | return selectionVisible; |
| 883 | } |
| 884 | |
| 885 | /** |
| 886 | * Determines if the caret is currently active. |
| 887 | * <p> |
| 888 | * This method returns whether or not the <code>Caret</code> |
| 889 | * is currently in a blinking state. It does not provide |
| 890 | * information as to whether it is currently blinked on or off. |
| 891 | * To determine if the caret is currently painted use the |
| 892 | * <code>isVisible</code> method. |
| 893 | * |
| 894 | * @return <code>true</code> if active else <code>false</code> |
| 895 | * @see #isVisible |
| 896 | * |
| 897 | * @since 1.5 |
| 898 | */ |
| 899 | public boolean isActive() { |
| 900 | return active; |
| 901 | } |
| 902 | |
| 903 | /** |
| 904 | * Indicates whether or not the caret is currently visible. As the |
| 905 | * caret flashes on and off the return value of this will change |
| 906 | * between true, when the caret is painted, and false, when the |
| 907 | * caret is not painted. <code>isActive</code> indicates whether |
| 908 | * or not the caret is in a blinking state, such that it <b>can</b> |
| 909 | * be visible, and <code>isVisible</code> indicates whether or not |
| 910 | * the caret <b>is</b> actually visible. |
| 911 | * <p> |
| 912 | * Subclasses that wish to render a different flashing caret |
| 913 | * should override paint and only paint the caret if this method |
| 914 | * returns true. |
| 915 | * |
| 916 | * @return true if visible else false |
| 917 | * @see Caret#isVisible |
| 918 | * @see #isActive |
| 919 | */ |
| 920 | public boolean isVisible() { |
| 921 | return visible; |
| 922 | } |
| 923 | |
| 924 | /** |
| 925 | * Sets the caret visibility, and repaints the caret. |
| 926 | * It is important to understand the relationship between this method, |
| 927 | * <code>isVisible</code> and <code>isActive</code>. |
| 928 | * Calling this method with a value of <code>true</code> activates the |
| 929 | * caret blinking. Setting it to <code>false</code> turns it completely off. |
| 930 | * To determine whether the blinking is active, you should call |
| 931 | * <code>isActive</code>. In effect, <code>isActive</code> is an |
| 932 | * appropriate corresponding "getter" method for this one. |
| 933 | * <code>isVisible</code> can be used to fetch the current |
| 934 | * visibility status of the caret, meaning whether or not it is currently |
| 935 | * painted. This status will change as the caret blinks on and off. |
| 936 | * <p> |
| 937 | * Here's a list showing the potential return values of both |
| 938 | * <code>isActive</code> and <code>isVisible</code> |
| 939 | * after calling this method: |
| 940 | * <p> |
| 941 | * <b><code>setVisible(true)</code></b>: |
| 942 | * <ul> |
| 943 | * <li>isActive(): true</li> |
| 944 | * <li>isVisible(): true or false depending on whether |
| 945 | * or not the caret is blinked on or off</li> |
| 946 | * </ul> |
| 947 | * <p> |
| 948 | * <b><code>setVisible(false)</code></b>: |
| 949 | * <ul> |
| 950 | * <li>isActive(): false</li> |
| 951 | * <li>isVisible(): false</li> |
| 952 | * </ul> |
| 953 | * |
| 954 | * @param e the visibility specifier |
| 955 | * @see #isActive |
| 956 | * @see Caret#setVisible |
| 957 | */ |
| 958 | public void setVisible(boolean e) { |
| 959 | // focus lost notification can come in later after the |
| 960 | // caret has been deinstalled, in which case the component |
| 961 | // will be null. |
| 962 | if (component != null) { |
| 963 | active = e; |
| 964 | TextUI mapper = component.getUI(); |
| 965 | if (visible != e) { |
| 966 | visible = e; |
| 967 | // repaint the caret |
| 968 | try { |
| 969 | Rectangle loc = mapper.modelToView(component, dot,dotBias); |
| 970 | damage(loc); |
| 971 | } catch (BadLocationException badloc) { |
| 972 | // hmm... not legally positioned |
| 973 | } |
| 974 | } |
| 975 | } |
| 976 | if (flasher != null) { |
| 977 | if (visible) { |
| 978 | flasher.start(); |
| 979 | } else { |
| 980 | flasher.stop(); |
| 981 | } |
| 982 | } |
| 983 | } |
| 984 | |
| 985 | /** |
| 986 | * Sets the caret blink rate. |
| 987 | * |
| 988 | * @param rate the rate in milliseconds, 0 to stop blinking |
| 989 | * @see Caret#setBlinkRate |
| 990 | */ |
| 991 | public void setBlinkRate(int rate) { |
| 992 | if (rate != 0) { |
| 993 | if (flasher == null) { |
| 994 | flasher = new Timer(rate, handler); |
| 995 | } |
| 996 | flasher.setDelay(rate); |
| 997 | } else { |
| 998 | if (flasher != null) { |
| 999 | flasher.stop(); |
| 1000 | flasher.removeActionListener(handler); |
| 1001 | flasher = null; |
| 1002 | } |
| 1003 | } |
| 1004 | } |
| 1005 | |
| 1006 | /** |
| 1007 | * Gets the caret blink rate. |
| 1008 | * |
| 1009 | * @return the delay in milliseconds. If this is |
| 1010 | * zero the caret will not blink. |
| 1011 | * @see Caret#getBlinkRate |
| 1012 | */ |
| 1013 | public int getBlinkRate() { |
| 1014 | return (flasher == null) ? 0 : flasher.getDelay(); |
| 1015 | } |
| 1016 | |
| 1017 | /** |
| 1018 | * Fetches the current position of the caret. |
| 1019 | * |
| 1020 | * @return the position >= 0 |
| 1021 | * @see Caret#getDot |
| 1022 | */ |
| 1023 | public int getDot() { |
| 1024 | return dot; |
| 1025 | } |
| 1026 | |
| 1027 | /** |
| 1028 | * Fetches the current position of the mark. If there is a selection, |
| 1029 | * the dot and mark will not be the same. |
| 1030 | * |
| 1031 | * @return the position >= 0 |
| 1032 | * @see Caret#getMark |
| 1033 | */ |
| 1034 | public int getMark() { |
| 1035 | return mark; |
| 1036 | } |
| 1037 | |
| 1038 | /** |
| 1039 | * Sets the caret position and mark to the specified position, |
| 1040 | * with a forward bias. This implicitly sets the |
| 1041 | * selection range to zero. |
| 1042 | * |
| 1043 | * @param dot the position >= 0 |
| 1044 | * @see #setDot(int, Position.Bias) |
| 1045 | * @see Caret#setDot |
| 1046 | */ |
| 1047 | public void setDot(int dot) { |
| 1048 | setDot(dot, Position.Bias.Forward); |
| 1049 | } |
| 1050 | |
| 1051 | /** |
| 1052 | * Moves the caret position to the specified position, |
| 1053 | * with a forward bias. |
| 1054 | * |
| 1055 | * @param dot the position >= 0 |
| 1056 | * @see #moveDot(int, javax.swing.text.Position.Bias) |
| 1057 | * @see Caret#moveDot |
| 1058 | */ |
| 1059 | public void moveDot(int dot) { |
| 1060 | moveDot(dot, Position.Bias.Forward); |
| 1061 | } |
| 1062 | |
| 1063 | // ---- Bidi methods (we could put these in a subclass) |
| 1064 | |
| 1065 | /** |
| 1066 | * Moves the caret position to the specified position, with the |
| 1067 | * specified bias. |
| 1068 | * |
| 1069 | * @param dot the position >= 0 |
| 1070 | * @param dotBias the bias for this position, not <code>null</code> |
| 1071 | * @throws IllegalArgumentException if the bias is <code>null</code> |
| 1072 | * @see Caret#moveDot |
| 1073 | * @since 1.6 |
| 1074 | */ |
| 1075 | public void moveDot(int dot, Position.Bias dotBias) { |
| 1076 | if (dotBias == null) { |
| 1077 | throw new IllegalArgumentException("null bias"); |
| 1078 | } |
| 1079 | |
| 1080 | if (! component.isEnabled()) { |
| 1081 | // don't allow selection on disabled components. |
| 1082 | setDot(dot, dotBias); |
| 1083 | return; |
| 1084 | } |
| 1085 | if (dot != this.dot) { |
| 1086 | NavigationFilter filter = component.getNavigationFilter(); |
| 1087 | |
| 1088 | if (filter != null) { |
| 1089 | filter.moveDot(getFilterBypass(), dot, dotBias); |
| 1090 | } |
| 1091 | else { |
| 1092 | handleMoveDot(dot, dotBias); |
| 1093 | } |
| 1094 | } |
| 1095 | } |
| 1096 | |
| 1097 | void handleMoveDot(int dot, Position.Bias dotBias) { |
| 1098 | changeCaretPosition(dot, dotBias); |
| 1099 | |
| 1100 | if (selectionVisible) { |
| 1101 | Highlighter h = component.getHighlighter(); |
| 1102 | if (h != null) { |
| 1103 | int p0 = Math.min(dot, mark); |
| 1104 | int p1 = Math.max(dot, mark); |
| 1105 | |
| 1106 | // if p0 == p1 then there should be no highlight, remove it if necessary |
| 1107 | if (p0 == p1) { |
| 1108 | if (selectionTag != null) { |
| 1109 | h.removeHighlight(selectionTag); |
| 1110 | selectionTag = null; |
| 1111 | } |
| 1112 | // otherwise, change or add the highlight |
| 1113 | } else { |
| 1114 | try { |
| 1115 | if (selectionTag != null) { |
| 1116 | h.changeHighlight(selectionTag, p0, p1); |
| 1117 | } else { |
| 1118 | Highlighter.HighlightPainter p = getSelectionPainter(); |
| 1119 | selectionTag = h.addHighlight(p0, p1, p); |
| 1120 | } |
| 1121 | } catch (BadLocationException e) { |
| 1122 | throw new StateInvariantError("Bad caret position"); |
| 1123 | } |
| 1124 | } |
| 1125 | } |
| 1126 | } |
| 1127 | } |
| 1128 | |
| 1129 | /** |
| 1130 | * Sets the caret position and mark to the specified position, with the |
| 1131 | * specified bias. This implicitly sets the selection range |
| 1132 | * to zero. |
| 1133 | * |
| 1134 | * @param dot the position >= 0 |
| 1135 | * @param dotBias the bias for this position, not <code>null</code> |
| 1136 | * @throws IllegalArgumentException if the bias is <code>null</code> |
| 1137 | * @see Caret#setDot |
| 1138 | * @since 1.6 |
| 1139 | */ |
| 1140 | public void setDot(int dot, Position.Bias dotBias) { |
| 1141 | if (dotBias == null) { |
| 1142 | throw new IllegalArgumentException("null bias"); |
| 1143 | } |
| 1144 | |
| 1145 | NavigationFilter filter = component.getNavigationFilter(); |
| 1146 | |
| 1147 | if (filter != null) { |
| 1148 | filter.setDot(getFilterBypass(), dot, dotBias); |
| 1149 | } |
| 1150 | else { |
| 1151 | handleSetDot(dot, dotBias); |
| 1152 | } |
| 1153 | } |
| 1154 | |
| 1155 | void handleSetDot(int dot, Position.Bias dotBias) { |
| 1156 | // move dot, if it changed |
| 1157 | Document doc = component.getDocument(); |
| 1158 | if (doc != null) { |
| 1159 | dot = Math.min(dot, doc.getLength()); |
| 1160 | } |
| 1161 | dot = Math.max(dot, 0); |
| 1162 | |
| 1163 | // The position (0,Backward) is out of range so disallow it. |
| 1164 | if( dot == 0 ) |
| 1165 | dotBias = Position.Bias.Forward; |
| 1166 | |
| 1167 | mark = dot; |
| 1168 | if (this.dot != dot || this.dotBias != dotBias || |
| 1169 | selectionTag != null || forceCaretPositionChange) { |
| 1170 | changeCaretPosition(dot, dotBias); |
| 1171 | } |
| 1172 | this.markBias = this.dotBias; |
| 1173 | this.markLTR = dotLTR; |
| 1174 | Highlighter h = component.getHighlighter(); |
| 1175 | if ((h != null) && (selectionTag != null)) { |
| 1176 | h.removeHighlight(selectionTag); |
| 1177 | selectionTag = null; |
| 1178 | } |
| 1179 | } |
| 1180 | |
| 1181 | /** |
| 1182 | * Returns the bias of the caret position. |
| 1183 | * |
| 1184 | * @return the bias of the caret position |
| 1185 | * @since 1.6 |
| 1186 | */ |
| 1187 | public Position.Bias getDotBias() { |
| 1188 | return dotBias; |
| 1189 | } |
| 1190 | |
| 1191 | /** |
| 1192 | * Returns the bias of the mark. |
| 1193 | * |
| 1194 | * @return the bias of the mark |
| 1195 | * @since 1.6 |
| 1196 | */ |
| 1197 | public Position.Bias getMarkBias() { |
| 1198 | return markBias; |
| 1199 | } |
| 1200 | |
| 1201 | boolean isDotLeftToRight() { |
| 1202 | return dotLTR; |
| 1203 | } |
| 1204 | |
| 1205 | boolean isMarkLeftToRight() { |
| 1206 | return markLTR; |
| 1207 | } |
| 1208 | |
| 1209 | boolean isPositionLTR(int position, Position.Bias bias) { |
| 1210 | Document doc = component.getDocument(); |
| 1211 | if(doc instanceof AbstractDocument ) { |
| 1212 | if(bias == Position.Bias.Backward && --position < 0) |
| 1213 | position = 0; |
| 1214 | return ((AbstractDocument)doc).isLeftToRight(position, position); |
| 1215 | } |
| 1216 | return true; |
| 1217 | } |
| 1218 | |
| 1219 | Position.Bias guessBiasForOffset(int offset, Position.Bias lastBias, |
| 1220 | boolean lastLTR) { |
| 1221 | // There is an abiguous case here. That if your model looks like: |
| 1222 | // abAB with the cursor at abB]A (visual representation of |
| 1223 | // 3 forward) deleting could either become abB] or |
| 1224 | // ab[B. I'ld actually prefer abB]. But, if I implement that |
| 1225 | // a delete at abBA] would result in aBA] vs a[BA which I |
| 1226 | // think is totally wrong. To get this right we need to know what |
| 1227 | // was deleted. And we could get this from the bidi structure |
| 1228 | // in the change event. So: |
| 1229 | // PENDING: base this off what was deleted. |
| 1230 | if(lastLTR != isPositionLTR(offset, lastBias)) { |
| 1231 | lastBias = Position.Bias.Backward; |
| 1232 | } |
| 1233 | else if(lastBias != Position.Bias.Backward && |
| 1234 | lastLTR != isPositionLTR(offset, Position.Bias.Backward)) { |
| 1235 | lastBias = Position.Bias.Backward; |
| 1236 | } |
| 1237 | if (lastBias == Position.Bias.Backward && offset > 0) { |
| 1238 | try { |
| 1239 | Segment s = new Segment(); |
| 1240 | component.getDocument().getText(offset - 1, 1, s); |
| 1241 | if (s.count > 0 && s.array[s.offset] == '\n') { |
| 1242 | lastBias = Position.Bias.Forward; |
| 1243 | } |
| 1244 | } |
| 1245 | catch (BadLocationException ble) {} |
| 1246 | } |
| 1247 | return lastBias; |
| 1248 | } |
| 1249 | |
| 1250 | // ---- local methods -------------------------------------------- |
| 1251 | |
| 1252 | /** |
| 1253 | * Sets the caret position (dot) to a new location. This |
| 1254 | * causes the old and new location to be repainted. It |
| 1255 | * also makes sure that the caret is within the visible |
| 1256 | * region of the view, if the view is scrollable. |
| 1257 | */ |
| 1258 | void changeCaretPosition(int dot, Position.Bias dotBias) { |
| 1259 | // repaint the old position and set the new value of |
| 1260 | // the dot. |
| 1261 | repaint(); |
| 1262 | |
| 1263 | |
| 1264 | // Make sure the caret is visible if this window has the focus. |
| 1265 | if (flasher != null && flasher.isRunning()) { |
| 1266 | visible = true; |
| 1267 | flasher.restart(); |
| 1268 | } |
| 1269 | |
| 1270 | // notify listeners at the caret moved |
| 1271 | this.dot = dot; |
| 1272 | this.dotBias = dotBias; |
| 1273 | dotLTR = isPositionLTR(dot, dotBias); |
| 1274 | fireStateChanged(); |
| 1275 | |
| 1276 | updateSystemSelection(); |
| 1277 | |
| 1278 | setMagicCaretPosition(null); |
| 1279 | |
| 1280 | // We try to repaint the caret later, since things |
| 1281 | // may be unstable at the time this is called |
| 1282 | // (i.e. we don't want to depend upon notification |
| 1283 | // order or the fact that this might happen on |
| 1284 | // an unsafe thread). |
| 1285 | Runnable callRepaintNewCaret = new Runnable() { |
| 1286 | public void run() { |
| 1287 | repaintNewCaret(); |
| 1288 | } |
| 1289 | }; |
| 1290 | SwingUtilities.invokeLater(callRepaintNewCaret); |
| 1291 | } |
| 1292 | |
| 1293 | /** |
| 1294 | * Repaints the new caret position, with the |
| 1295 | * assumption that this is happening on the |
| 1296 | * event thread so that calling <code>modelToView</code> |
| 1297 | * is safe. |
| 1298 | */ |
| 1299 | void repaintNewCaret() { |
| 1300 | if (component != null) { |
| 1301 | TextUI mapper = component.getUI(); |
| 1302 | Document doc = component.getDocument(); |
| 1303 | if ((mapper != null) && (doc != null)) { |
| 1304 | // determine the new location and scroll if |
| 1305 | // not visible. |
| 1306 | Rectangle newLoc; |
| 1307 | try { |
| 1308 | newLoc = mapper.modelToView(component, this.dot, this.dotBias); |
| 1309 | } catch (BadLocationException e) { |
| 1310 | newLoc = null; |
| 1311 | } |
| 1312 | if (newLoc != null) { |
| 1313 | adjustVisibility(newLoc); |
| 1314 | // If there is no magic caret position, make one |
| 1315 | if (getMagicCaretPosition() == null) { |
| 1316 | setMagicCaretPosition(new Point(newLoc.x, newLoc.y)); |
| 1317 | } |
| 1318 | } |
| 1319 | |
| 1320 | // repaint the new position |
| 1321 | damage(newLoc); |
| 1322 | } |
| 1323 | } |
| 1324 | } |
| 1325 | |
| 1326 | private void updateSystemSelection() { |
| 1327 | if ( ! SwingUtilities2.canCurrentEventAccessSystemClipboard() ) { |
| 1328 | return; |
| 1329 | } |
| 1330 | if (this.dot != this.mark && component != null) { |
| 1331 | Clipboard clip = getSystemSelection(); |
| 1332 | if (clip != null) { |
| 1333 | String selectedText = null; |
| 1334 | if (component instanceof JPasswordField |
| 1335 | && component.getClientProperty("JPasswordField.cutCopyAllowed") != |
| 1336 | Boolean.TRUE) { |
| 1337 | //fix for 4793761 |
| 1338 | StringBuffer txt = null; |
| 1339 | char echoChar = ((JPasswordField)component).getEchoChar(); |
| 1340 | int p0 = Math.min(getDot(), getMark()); |
| 1341 | int p1 = Math.max(getDot(), getMark()); |
| 1342 | for (int i = p0; i < p1; i++) { |
| 1343 | if (txt == null) { |
| 1344 | txt = new StringBuffer(); |
| 1345 | } |
| 1346 | txt.append(echoChar); |
| 1347 | } |
| 1348 | selectedText = (txt != null) ? txt.toString() : null; |
| 1349 | } else { |
| 1350 | selectedText = component.getSelectedText(); |
| 1351 | } |
| 1352 | try { |
| 1353 | clip.setContents( |
| 1354 | new StringSelection(selectedText), getClipboardOwner()); |
| 1355 | |
| 1356 | ownsSelection = true; |
| 1357 | } catch (IllegalStateException ise) { |
| 1358 | // clipboard was unavailable |
| 1359 | // no need to provide error feedback to user since updating |
| 1360 | // the system selection is not a user invoked action |
| 1361 | } |
| 1362 | } |
| 1363 | } |
| 1364 | } |
| 1365 | |
| 1366 | private Clipboard getSystemSelection() { |
| 1367 | try { |
| 1368 | return component.getToolkit().getSystemSelection(); |
| 1369 | } catch (HeadlessException he) { |
| 1370 | // do nothing... there is no system clipboard |
| 1371 | } catch (SecurityException se) { |
| 1372 | // do nothing... there is no allowed system clipboard |
| 1373 | } |
| 1374 | return null; |
| 1375 | } |
| 1376 | |
| 1377 | private ClipboardOwner getClipboardOwner() { |
| 1378 | return handler; |
| 1379 | } |
| 1380 | |
| 1381 | /** |
| 1382 | * This is invoked after the document changes to verify the current |
| 1383 | * dot/mark is valid. We do this in case the <code>NavigationFilter</code> |
| 1384 | * changed where to position the dot, that resulted in the current location |
| 1385 | * being bogus. |
| 1386 | */ |
| 1387 | private void ensureValidPosition() { |
| 1388 | int length = component.getDocument().getLength(); |
| 1389 | if (dot > length || mark > length) { |
| 1390 | // Current location is bogus and filter likely vetoed the |
| 1391 | // change, force the reset without giving the filter a |
| 1392 | // chance at changing it. |
| 1393 | handleSetDot(length, Position.Bias.Forward); |
| 1394 | } |
| 1395 | } |
| 1396 | |
| 1397 | |
| 1398 | /** |
| 1399 | * Saves the current caret position. This is used when |
| 1400 | * caret up/down actions occur, moving between lines |
| 1401 | * that have uneven end positions. |
| 1402 | * |
| 1403 | * @param p the position |
| 1404 | * @see #getMagicCaretPosition |
| 1405 | */ |
| 1406 | public void setMagicCaretPosition(Point p) { |
| 1407 | magicCaretPosition = p; |
| 1408 | } |
| 1409 | |
| 1410 | /** |
| 1411 | * Gets the saved caret position. |
| 1412 | * |
| 1413 | * @return the position |
| 1414 | * see #setMagicCaretPosition |
| 1415 | */ |
| 1416 | public Point getMagicCaretPosition() { |
| 1417 | return magicCaretPosition; |
| 1418 | } |
| 1419 | |
| 1420 | /** |
| 1421 | * Compares this object to the specified object. |
| 1422 | * The superclass behavior of comparing rectangles |
| 1423 | * is not desired, so this is changed to the Object |
| 1424 | * behavior. |
| 1425 | * |
| 1426 | * @param obj the object to compare this font with |
| 1427 | * @return <code>true</code> if the objects are equal; |
| 1428 | * <code>false</code> otherwise |
| 1429 | */ |
| 1430 | public boolean equals(Object obj) { |
| 1431 | return (this == obj); |
| 1432 | } |
| 1433 | |
| 1434 | public String toString() { |
| 1435 | String s = "Dot=(" + dot + ", " + dotBias + ")"; |
| 1436 | s += " Mark=(" + mark + ", " + markBias + ")"; |
| 1437 | return s; |
| 1438 | } |
| 1439 | |
| 1440 | private NavigationFilter.FilterBypass getFilterBypass() { |
| 1441 | if (filterBypass == null) { |
| 1442 | filterBypass = new DefaultFilterBypass(); |
| 1443 | } |
| 1444 | return filterBypass; |
| 1445 | } |
| 1446 | |
| 1447 | // Rectangle.contains returns false if passed a rect with a w or h == 0, |
| 1448 | // this won't (assuming X,Y are contained with this rectangle). |
| 1449 | private boolean _contains(int X, int Y, int W, int H) { |
| 1450 | int w = this.width; |
| 1451 | int h = this.height; |
| 1452 | if ((w | h | W | H) < 0) { |
| 1453 | // At least one of the dimensions is negative... |
| 1454 | return false; |
| 1455 | } |
| 1456 | // Note: if any dimension is zero, tests below must return false... |
| 1457 | int x = this.x; |
| 1458 | int y = this.y; |
| 1459 | if (X < x || Y < y) { |
| 1460 | return false; |
| 1461 | } |
| 1462 | if (W > 0) { |
| 1463 | w += x; |
| 1464 | W += X; |
| 1465 | if (W <= X) { |
| 1466 | // X+W overflowed or W was zero, return false if... |
| 1467 | // either original w or W was zero or |
| 1468 | // x+w did not overflow or |
| 1469 | // the overflowed x+w is smaller than the overflowed X+W |
| 1470 | if (w >= x || W > w) return false; |
| 1471 | } else { |
| 1472 | // X+W did not overflow and W was not zero, return false if... |
| 1473 | // original w was zero or |
| 1474 | // x+w did not overflow and x+w is smaller than X+W |
| 1475 | if (w >= x && W > w) return false; |
| 1476 | } |
| 1477 | } |
| 1478 | else if ((x + w) < X) { |
| 1479 | return false; |
| 1480 | } |
| 1481 | if (H > 0) { |
| 1482 | h += y; |
| 1483 | H += Y; |
| 1484 | if (H <= Y) { |
| 1485 | if (h >= y || H > h) return false; |
| 1486 | } else { |
| 1487 | if (h >= y && H > h) return false; |
| 1488 | } |
| 1489 | } |
| 1490 | else if ((y + h) < Y) { |
| 1491 | return false; |
| 1492 | } |
| 1493 | return true; |
| 1494 | } |
| 1495 | |
| 1496 | int getCaretWidth(int height) { |
| 1497 | if (aspectRatio > -1) { |
| 1498 | return (int) (aspectRatio * height) + 1; |
| 1499 | } |
| 1500 | |
| 1501 | if (caretWidth > -1) { |
| 1502 | return caretWidth; |
| 1503 | } |
| 1504 | |
| 1505 | return 1; |
| 1506 | } |
| 1507 | |
| 1508 | // --- serialization --------------------------------------------- |
| 1509 | |
| 1510 | private void readObject(ObjectInputStream s) |
| 1511 | throws ClassNotFoundException, IOException |
| 1512 | { |
| 1513 | s.defaultReadObject(); |
| 1514 | handler = new Handler(); |
| 1515 | if (!s.readBoolean()) { |
| 1516 | dotBias = Position.Bias.Forward; |
| 1517 | } |
| 1518 | else { |
| 1519 | dotBias = Position.Bias.Backward; |
| 1520 | } |
| 1521 | if (!s.readBoolean()) { |
| 1522 | markBias = Position.Bias.Forward; |
| 1523 | } |
| 1524 | else { |
| 1525 | markBias = Position.Bias.Backward; |
| 1526 | } |
| 1527 | } |
| 1528 | |
| 1529 | private void writeObject(ObjectOutputStream s) throws IOException { |
| 1530 | s.defaultWriteObject(); |
| 1531 | s.writeBoolean((dotBias == Position.Bias.Backward)); |
| 1532 | s.writeBoolean((markBias == Position.Bias.Backward)); |
| 1533 | } |
| 1534 | |
| 1535 | // ---- member variables ------------------------------------------ |
| 1536 | |
| 1537 | /** |
| 1538 | * The event listener list. |
| 1539 | */ |
| 1540 | protected EventListenerList listenerList = new EventListenerList(); |
| 1541 | |
| 1542 | /** |
| 1543 | * The change event for the model. |
| 1544 | * Only one ChangeEvent is needed per model instance since the |
| 1545 | * event's only (read-only) state is the source property. The source |
| 1546 | * of events generated here is always "this". |
| 1547 | */ |
| 1548 | protected transient ChangeEvent changeEvent = null; |
| 1549 | |
| 1550 | // package-private to avoid inner classes private member |
| 1551 | // access bug |
| 1552 | JTextComponent component; |
| 1553 | |
| 1554 | int updatePolicy = UPDATE_WHEN_ON_EDT; |
| 1555 | boolean visible; |
| 1556 | boolean active; |
| 1557 | int dot; |
| 1558 | int mark; |
| 1559 | Object selectionTag; |
| 1560 | boolean selectionVisible; |
| 1561 | Timer flasher; |
| 1562 | Point magicCaretPosition; |
| 1563 | transient Position.Bias dotBias; |
| 1564 | transient Position.Bias markBias; |
| 1565 | boolean dotLTR; |
| 1566 | boolean markLTR; |
| 1567 | transient Handler handler = new Handler(); |
| 1568 | transient private int[] flagXPoints = new int[3]; |
| 1569 | transient private int[] flagYPoints = new int[3]; |
| 1570 | private transient NavigationFilter.FilterBypass filterBypass; |
| 1571 | static private transient Action selectWord = null; |
| 1572 | static private transient Action selectLine = null; |
| 1573 | /** |
| 1574 | * This is used to indicate if the caret currently owns the selection. |
| 1575 | * This is always false if the system does not support the system |
| 1576 | * clipboard. |
| 1577 | */ |
| 1578 | private boolean ownsSelection; |
| 1579 | |
| 1580 | /** |
| 1581 | * If this is true, the location of the dot is updated regardless of |
| 1582 | * the current location. This is set in the DocumentListener |
| 1583 | * such that even if the model location of dot hasn't changed (perhaps do |
| 1584 | * to a forward delete) the visual location is updated. |
| 1585 | */ |
| 1586 | private boolean forceCaretPositionChange; |
| 1587 | |
| 1588 | /** |
| 1589 | * Whether or not mouseReleased should adjust the caret and focus. |
| 1590 | * This flag is set by mousePressed if it wanted to adjust the caret |
| 1591 | * and focus but couldn't because of a possible DnD operation. |
| 1592 | */ |
| 1593 | private transient boolean shouldHandleRelease; |
| 1594 | |
| 1595 | |
| 1596 | /** |
| 1597 | * holds last MouseEvent which caused the word selection |
| 1598 | */ |
| 1599 | private transient MouseEvent selectedWordEvent = null; |
| 1600 | |
| 1601 | /** |
| 1602 | * The width of the caret in pixels. |
| 1603 | */ |
| 1604 | private int caretWidth = -1; |
| 1605 | private float aspectRatio = -1; |
| 1606 | |
| 1607 | class SafeScroller implements Runnable { |
| 1608 | |
| 1609 | SafeScroller(Rectangle r) { |
| 1610 | this.r = r; |
| 1611 | } |
| 1612 | |
| 1613 | public void run() { |
| 1614 | if (component != null) { |
| 1615 | component.scrollRectToVisible(r); |
| 1616 | } |
| 1617 | } |
| 1618 | |
| 1619 | Rectangle r; |
| 1620 | } |
| 1621 | |
| 1622 | |
| 1623 | class Handler implements PropertyChangeListener, DocumentListener, ActionListener, ClipboardOwner { |
| 1624 | |
| 1625 | // --- ActionListener methods ---------------------------------- |
| 1626 | |
| 1627 | /** |
| 1628 | * Invoked when the blink timer fires. This is called |
| 1629 | * asynchronously. The simply changes the visibility |
| 1630 | * and repaints the rectangle that last bounded the caret. |
| 1631 | * |
| 1632 | * @param e the action event |
| 1633 | */ |
| 1634 | public void actionPerformed(ActionEvent e) { |
| 1635 | if (width == 0 || height == 0) { |
| 1636 | // setVisible(true) will cause a scroll, only do this if the |
| 1637 | // new location is really valid. |
| 1638 | if (component != null) { |
| 1639 | TextUI mapper = component.getUI(); |
| 1640 | try { |
| 1641 | Rectangle r = mapper.modelToView(component, dot, |
| 1642 | dotBias); |
| 1643 | if (r != null && r.width != 0 && r.height != 0) { |
| 1644 | damage(r); |
| 1645 | } |
| 1646 | } catch (BadLocationException ble) { |
| 1647 | } |
| 1648 | } |
| 1649 | } |
| 1650 | visible = !visible; |
| 1651 | repaint(); |
| 1652 | } |
| 1653 | |
| 1654 | // --- DocumentListener methods -------------------------------- |
| 1655 | |
| 1656 | /** |
| 1657 | * Updates the dot and mark if they were changed by |
| 1658 | * the insertion. |
| 1659 | * |
| 1660 | * @param e the document event |
| 1661 | * @see DocumentListener#insertUpdate |
| 1662 | */ |
| 1663 | public void insertUpdate(DocumentEvent e) { |
| 1664 | if (getUpdatePolicy() == NEVER_UPDATE || |
| 1665 | (getUpdatePolicy() == UPDATE_WHEN_ON_EDT && |
| 1666 | !SwingUtilities.isEventDispatchThread())) { |
| 1667 | |
| 1668 | if ((e.getOffset() <= dot || e.getOffset() <= mark) |
| 1669 | && selectionTag != null) { |
| 1670 | try { |
| 1671 | component.getHighlighter().changeHighlight(selectionTag, |
| 1672 | Math.min(dot, mark), Math.max(dot, mark)); |
| 1673 | } catch (BadLocationException e1) { |
| 1674 | e1.printStackTrace(); |
| 1675 | } |
| 1676 | } |
| 1677 | return; |
| 1678 | } |
| 1679 | int adjust = 0; |
| 1680 | int offset = e.getOffset(); |
| 1681 | int length = e.getLength(); |
| 1682 | int newDot = dot; |
| 1683 | short changed = 0; |
| 1684 | |
| 1685 | if (e instanceof AbstractDocument.UndoRedoDocumentEvent) { |
| 1686 | setDot(offset + length); |
| 1687 | return; |
| 1688 | } |
| 1689 | if (newDot >= offset) { |
| 1690 | newDot += length; |
| 1691 | changed |= 1; |
| 1692 | } |
| 1693 | int newMark = mark; |
| 1694 | if (newMark >= offset) { |
| 1695 | newMark += length; |
| 1696 | changed |= 2; |
| 1697 | } |
| 1698 | |
| 1699 | if (changed != 0) { |
| 1700 | Position.Bias dotBias = DefaultCaret.this.dotBias; |
| 1701 | if (dot == offset) { |
| 1702 | Document doc = component.getDocument(); |
| 1703 | boolean isNewline; |
| 1704 | try { |
| 1705 | Segment s = new Segment(); |
| 1706 | doc.getText(newDot - 1, 1, s); |
| 1707 | isNewline = (s.count > 0 && |
| 1708 | s.array[s.offset] == '\n'); |
| 1709 | } catch (BadLocationException ble) { |
| 1710 | isNewline = false; |
| 1711 | } |
| 1712 | if (isNewline) { |
| 1713 | dotBias = Position.Bias.Forward; |
| 1714 | } else { |
| 1715 | dotBias = Position.Bias.Backward; |
| 1716 | } |
| 1717 | } |
| 1718 | if (newMark == newDot) { |
| 1719 | setDot(newDot, dotBias); |
| 1720 | ensureValidPosition(); |
| 1721 | } |
| 1722 | else { |
| 1723 | setDot(newMark, markBias); |
| 1724 | if (getDot() == newMark) { |
| 1725 | // Due this test in case the filter vetoed the |
| 1726 | // change in which case this probably won't be |
| 1727 | // valid either. |
| 1728 | moveDot(newDot, dotBias); |
| 1729 | } |
| 1730 | ensureValidPosition(); |
| 1731 | } |
| 1732 | } |
| 1733 | } |
| 1734 | |
| 1735 | /** |
| 1736 | * Updates the dot and mark if they were changed |
| 1737 | * by the removal. |
| 1738 | * |
| 1739 | * @param e the document event |
| 1740 | * @see DocumentListener#removeUpdate |
| 1741 | */ |
| 1742 | public void removeUpdate(DocumentEvent e) { |
| 1743 | if (getUpdatePolicy() == NEVER_UPDATE || |
| 1744 | (getUpdatePolicy() == UPDATE_WHEN_ON_EDT && |
| 1745 | !SwingUtilities.isEventDispatchThread())) { |
| 1746 | |
| 1747 | int length = component.getDocument().getLength(); |
| 1748 | dot = Math.min(dot, length); |
| 1749 | mark = Math.min(mark, length); |
| 1750 | if ((e.getOffset() < dot || e.getOffset() < mark) |
| 1751 | && selectionTag != null) { |
| 1752 | try { |
| 1753 | component.getHighlighter().changeHighlight(selectionTag, |
| 1754 | Math.min(dot, mark), Math.max(dot, mark)); |
| 1755 | } catch (BadLocationException e1) { |
| 1756 | e1.printStackTrace(); |
| 1757 | } |
| 1758 | } |
| 1759 | return; |
| 1760 | } |
| 1761 | int offs0 = e.getOffset(); |
| 1762 | int offs1 = offs0 + e.getLength(); |
| 1763 | int adjust = 0; |
| 1764 | int newDot = dot; |
| 1765 | boolean adjustDotBias = false; |
| 1766 | int newMark = mark; |
| 1767 | boolean adjustMarkBias = false; |
| 1768 | |
| 1769 | if(e instanceof AbstractDocument.UndoRedoDocumentEvent) { |
| 1770 | setDot(offs0); |
| 1771 | return; |
| 1772 | } |
| 1773 | if (newDot >= offs1) { |
| 1774 | newDot -= (offs1 - offs0); |
| 1775 | if(newDot == offs1) { |
| 1776 | adjustDotBias = true; |
| 1777 | } |
| 1778 | } else if (newDot >= offs0) { |
| 1779 | newDot = offs0; |
| 1780 | adjustDotBias = true; |
| 1781 | } |
| 1782 | if (newMark >= offs1) { |
| 1783 | newMark -= (offs1 - offs0); |
| 1784 | if(newMark == offs1) { |
| 1785 | adjustMarkBias = true; |
| 1786 | } |
| 1787 | } else if (newMark >= offs0) { |
| 1788 | newMark = offs0; |
| 1789 | adjustMarkBias = true; |
| 1790 | } |
| 1791 | if (newMark == newDot) { |
| 1792 | forceCaretPositionChange = true; |
| 1793 | try { |
| 1794 | setDot(newDot, guessBiasForOffset(newDot, dotBias, |
| 1795 | dotLTR)); |
| 1796 | } finally { |
| 1797 | forceCaretPositionChange = false; |
| 1798 | } |
| 1799 | ensureValidPosition(); |
| 1800 | } else { |
| 1801 | Position.Bias dotBias = DefaultCaret.this.dotBias; |
| 1802 | Position.Bias markBias = DefaultCaret.this.markBias; |
| 1803 | if(adjustDotBias) { |
| 1804 | dotBias = guessBiasForOffset(newDot, dotBias, dotLTR); |
| 1805 | } |
| 1806 | if(adjustMarkBias) { |
| 1807 | markBias = guessBiasForOffset(mark, markBias, markLTR); |
| 1808 | } |
| 1809 | setDot(newMark, markBias); |
| 1810 | if (getDot() == newMark) { |
| 1811 | // Due this test in case the filter vetoed the change |
| 1812 | // in which case this probably won't be valid either. |
| 1813 | moveDot(newDot, dotBias); |
| 1814 | } |
| 1815 | ensureValidPosition(); |
| 1816 | } |
| 1817 | } |
| 1818 | |
| 1819 | /** |
| 1820 | * Gives notification that an attribute or set of attributes changed. |
| 1821 | * |
| 1822 | * @param e the document event |
| 1823 | * @see DocumentListener#changedUpdate |
| 1824 | */ |
| 1825 | public void changedUpdate(DocumentEvent e) { |
| 1826 | if (getUpdatePolicy() == NEVER_UPDATE || |
| 1827 | (getUpdatePolicy() == UPDATE_WHEN_ON_EDT && |
| 1828 | !SwingUtilities.isEventDispatchThread())) { |
| 1829 | return; |
| 1830 | } |
| 1831 | if(e instanceof AbstractDocument.UndoRedoDocumentEvent) { |
| 1832 | setDot(e.getOffset() + e.getLength()); |
| 1833 | } |
| 1834 | } |
| 1835 | |
| 1836 | // --- PropertyChangeListener methods ----------------------- |
| 1837 | |
| 1838 | /** |
| 1839 | * This method gets called when a bound property is changed. |
| 1840 | * We are looking for document changes on the editor. |
| 1841 | */ |
| 1842 | public void propertyChange(PropertyChangeEvent evt) { |
| 1843 | Object oldValue = evt.getOldValue(); |
| 1844 | Object newValue = evt.getNewValue(); |
| 1845 | if ((oldValue instanceof Document) || (newValue instanceof Document)) { |
| 1846 | setDot(0); |
| 1847 | if (oldValue != null) { |
| 1848 | ((Document)oldValue).removeDocumentListener(this); |
| 1849 | } |
| 1850 | if (newValue != null) { |
| 1851 | ((Document)newValue).addDocumentListener(this); |
| 1852 | } |
| 1853 | } else if("enabled".equals(evt.getPropertyName())) { |
| 1854 | Boolean enabled = (Boolean) evt.getNewValue(); |
| 1855 | if(component.isFocusOwner()) { |
| 1856 | if(enabled == Boolean.TRUE) { |
| 1857 | if(component.isEditable()) { |
| 1858 | setVisible(true); |
| 1859 | } |
| 1860 | setSelectionVisible(true); |
| 1861 | } else { |
| 1862 | setVisible(false); |
| 1863 | setSelectionVisible(false); |
| 1864 | } |
| 1865 | } |
| 1866 | } else if("caretWidth".equals(evt.getPropertyName())) { |
| 1867 | Integer newWidth = (Integer) evt.getNewValue(); |
| 1868 | if (newWidth != null) { |
| 1869 | caretWidth = newWidth.intValue(); |
| 1870 | } else { |
| 1871 | caretWidth = -1; |
| 1872 | } |
| 1873 | repaint(); |
| 1874 | } else if("caretAspectRatio".equals(evt.getPropertyName())) { |
| 1875 | Number newRatio = (Number) evt.getNewValue(); |
| 1876 | if (newRatio != null) { |
| 1877 | aspectRatio = newRatio.floatValue(); |
| 1878 | } else { |
| 1879 | aspectRatio = -1; |
| 1880 | } |
| 1881 | repaint(); |
| 1882 | } |
| 1883 | } |
| 1884 | |
| 1885 | |
| 1886 | // |
| 1887 | // ClipboardOwner |
| 1888 | // |
| 1889 | /** |
| 1890 | * Toggles the visibility of the selection when ownership is lost. |
| 1891 | */ |
| 1892 | public void lostOwnership(Clipboard clipboard, |
| 1893 | Transferable contents) { |
| 1894 | if (ownsSelection) { |
| 1895 | ownsSelection = false; |
| 1896 | if (component != null && !component.hasFocus()) { |
| 1897 | setSelectionVisible(false); |
| 1898 | } |
| 1899 | } |
| 1900 | } |
| 1901 | } |
| 1902 | |
| 1903 | |
| 1904 | private class DefaultFilterBypass extends NavigationFilter.FilterBypass { |
| 1905 | public Caret getCaret() { |
| 1906 | return DefaultCaret.this; |
| 1907 | } |
| 1908 | |
| 1909 | public void setDot(int dot, Position.Bias bias) { |
| 1910 | handleSetDot(dot, bias); |
| 1911 | } |
| 1912 | |
| 1913 | public void moveDot(int dot, Position.Bias bias) { |
| 1914 | handleMoveDot(dot, bias); |
| 1915 | } |
| 1916 | } |
| 1917 | } |