1 /* 2 * Copyright (c) 1995, 2015, Oracle and/or its affiliates. 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package java.awt; 27 28 import java.awt.datatransfer.Clipboard; 29 import java.awt.dnd.DragGestureListener; 30 import java.awt.dnd.DragGestureRecognizer; 31 import java.awt.dnd.DragSource; 32 import java.awt.event.*; 33 import java.awt.im.InputMethodHighlight; 34 import java.awt.image.ColorModel; 35 import java.awt.image.ImageObserver; 36 import java.awt.image.ImageProducer; 37 import java.beans.PropertyChangeEvent; 38 import java.beans.PropertyChangeListener; 39 import java.beans.PropertyChangeSupport; 40 import java.io.File; 41 import java.io.FileInputStream; 42 import java.net.URL; 43 import java.util.ArrayList; 44 import java.util.EventListener; 45 import java.util.HashMap; 46 import java.util.Map; 47 import java.util.MissingResourceException; 48 import java.util.Properties; 49 import java.util.ResourceBundle; 50 import java.util.StringTokenizer; 51 import java.util.WeakHashMap; 52 53 import sun.awt.AWTAccessor; 54 import sun.awt.AWTPermissions; 55 import sun.awt.AppContext; 56 import sun.awt.HeadlessToolkit; 57 import sun.awt.PeerEvent; 58 import sun.awt.SunToolkit; 59 60 import java.security.AccessController; 61 import java.security.PrivilegedAction; 62 import java.util.Arrays; 63 import java.util.ServiceLoader; 64 import java.util.Set; 65 import java.util.stream.Collectors; 66 import javax.accessibility.AccessibilityProvider; 67 68 /** 69 * This class is the abstract superclass of all actual 70 * implementations of the Abstract Window Toolkit. Subclasses of 71 * the {@code Toolkit} class are used to bind the various components 72 * to particular native toolkit implementations. 73 * <p> 74 * Many GUI events may be delivered to user 75 * asynchronously, if the opposite is not specified explicitly. 76 * As well as 77 * many GUI operations may be performed asynchronously. 78 * This fact means that if the state of a component is set, and then 79 * the state immediately queried, the returned value may not yet 80 * reflect the requested change. This behavior includes, but is not 81 * limited to: 82 * <ul> 83 * <li>Scrolling to a specified position. 84 * <br>For example, calling {@code ScrollPane.setScrollPosition} 85 * and then {@code getScrollPosition} may return an incorrect 86 * value if the original request has not yet been processed. 87 * 88 * <li>Moving the focus from one component to another. 89 * <br>For more information, see 90 * <a href="http://docs.oracle.com/javase/tutorial/uiswing/misc/focus.html#transferTiming">Timing 91 * Focus Transfers</a>, a section in 92 * <a href="http://java.sun.com/docs/books/tutorial/uiswing/">The Swing 93 * Tutorial</a>. 94 * 95 * <li>Making a top-level container visible. 96 * <br>Calling {@code setVisible(true)} on a {@code Window}, 97 * {@code Frame} or {@code Dialog} may occur 98 * asynchronously. 99 * 100 * <li>Setting the size or location of a top-level container. 101 * <br>Calls to {@code setSize}, {@code setBounds} or 102 * {@code setLocation} on a {@code Window}, 103 * {@code Frame} or {@code Dialog} are forwarded 104 * to the underlying window management system and may be 105 * ignored or modified. See {@link java.awt.Window} for 106 * more information. 107 * </ul> 108 * <p> 109 * Most applications should not call any of the methods in this 110 * class directly. The methods defined by {@code Toolkit} are 111 * the "glue" that joins the platform-independent classes in the 112 * {@code java.awt} package with their counterparts in 113 * {@code java.awt.peer}. Some methods defined by 114 * {@code Toolkit} query the native operating system directly. 115 * 116 * @author Sami Shaio 117 * @author Arthur van Hoff 118 * @author Fred Ecks 119 * @since 1.0 120 */ 121 public abstract class Toolkit { 122 123 // The following method is called by the private method 124 // <code>updateSystemColors</code> in <code>SystemColor</code>. 125 126 /** 127 * Fills in the integer array that is supplied as an argument 128 * with the current system color values. 129 * 130 * @param systemColors an integer array. 131 * @exception HeadlessException if GraphicsEnvironment.isHeadless() 132 * returns true 133 * @see java.awt.GraphicsEnvironment#isHeadless 134 * @since 1.1 135 */ 136 protected void loadSystemColors(int[] systemColors) 137 throws HeadlessException { 138 GraphicsEnvironment.checkHeadless(); 139 } 140 141 /** 142 * Controls whether the layout of Containers is validated dynamically 143 * during resizing, or statically, after resizing is complete. 144 * Use {@code isDynamicLayoutActive()} to detect if this feature enabled 145 * in this program and is supported by this operating system 146 * and/or window manager. 147 * Note that this feature is supported not on all platforms, and 148 * conversely, that this feature cannot be turned off on some platforms. 149 * On these platforms where dynamic layout during resizing is not supported 150 * (or is always supported), setting this property has no effect. 151 * Note that this feature can be set or unset as a property of the 152 * operating system or window manager on some platforms. On such 153 * platforms, the dynamic resize property must be set at the operating 154 * system or window manager level before this method can take effect. 155 * This method does not change support or settings of the underlying 156 * operating system or 157 * window manager. The OS/WM support can be 158 * queried using getDesktopProperty("awt.dynamicLayoutSupported") method. 159 * 160 * @param dynamic If true, Containers should re-layout their 161 * components as the Container is being resized. If false, 162 * the layout will be validated after resizing is completed. 163 * @exception HeadlessException if GraphicsEnvironment.isHeadless() 164 * returns true 165 * @see #isDynamicLayoutSet() 166 * @see #isDynamicLayoutActive() 167 * @see #getDesktopProperty(String propertyName) 168 * @see java.awt.GraphicsEnvironment#isHeadless 169 * @since 1.4 170 */ 171 public void setDynamicLayout(final boolean dynamic) 172 throws HeadlessException { 173 GraphicsEnvironment.checkHeadless(); 174 if (this != getDefaultToolkit()) { 175 getDefaultToolkit().setDynamicLayout(dynamic); 176 } 177 } 178 179 /** 180 * Returns whether the layout of Containers is validated dynamically 181 * during resizing, or statically, after resizing is complete. 182 * Note: this method returns the value that was set programmatically; 183 * it does not reflect support at the level of the operating system 184 * or window manager for dynamic layout on resizing, or the current 185 * operating system or window manager settings. The OS/WM support can 186 * be queried using getDesktopProperty("awt.dynamicLayoutSupported"). 187 * 188 * @return true if validation of Containers is done dynamically, 189 * false if validation is done after resizing is finished. 190 * @exception HeadlessException if GraphicsEnvironment.isHeadless() 191 * returns true 192 * @see #setDynamicLayout(boolean dynamic) 193 * @see #isDynamicLayoutActive() 194 * @see #getDesktopProperty(String propertyName) 195 * @see java.awt.GraphicsEnvironment#isHeadless 196 * @since 1.4 197 */ 198 protected boolean isDynamicLayoutSet() 199 throws HeadlessException { 200 GraphicsEnvironment.checkHeadless(); 201 202 if (this != Toolkit.getDefaultToolkit()) { 203 return Toolkit.getDefaultToolkit().isDynamicLayoutSet(); 204 } else { 205 return false; 206 } 207 } 208 209 /** 210 * Returns whether dynamic layout of Containers on resize is 211 * currently active (both set in program 212 *( {@code isDynamicLayoutSet()} ) 213 *, and supported 214 * by the underlying operating system and/or window manager). 215 * If dynamic layout is currently inactive then Containers 216 * re-layout their components when resizing is completed. As a result 217 * the {@code Component.validate()} method will be invoked only 218 * once per resize. 219 * If dynamic layout is currently active then Containers 220 * re-layout their components on every native resize event and 221 * the {@code validate()} method will be invoked each time. 222 * The OS/WM support can be queried using 223 * the getDesktopProperty("awt.dynamicLayoutSupported") method. 224 * 225 * @return true if dynamic layout of Containers on resize is 226 * currently active, false otherwise. 227 * @exception HeadlessException if the GraphicsEnvironment.isHeadless() 228 * method returns true 229 * @see #setDynamicLayout(boolean dynamic) 230 * @see #isDynamicLayoutSet() 231 * @see #getDesktopProperty(String propertyName) 232 * @see java.awt.GraphicsEnvironment#isHeadless 233 * @since 1.4 234 */ 235 public boolean isDynamicLayoutActive() 236 throws HeadlessException { 237 GraphicsEnvironment.checkHeadless(); 238 239 if (this != Toolkit.getDefaultToolkit()) { 240 return Toolkit.getDefaultToolkit().isDynamicLayoutActive(); 241 } else { 242 return false; 243 } 244 } 245 246 /** 247 * Gets the size of the screen. On systems with multiple displays, the 248 * primary display is used. Multi-screen aware display dimensions are 249 * available from {@code GraphicsConfiguration} and 250 * {@code GraphicsDevice}. 251 * @return the size of this toolkit's screen, in pixels. 252 * @exception HeadlessException if GraphicsEnvironment.isHeadless() 253 * returns true 254 * @see java.awt.GraphicsConfiguration#getBounds 255 * @see java.awt.GraphicsDevice#getDisplayMode 256 * @see java.awt.GraphicsEnvironment#isHeadless 257 */ 258 public abstract Dimension getScreenSize() 259 throws HeadlessException; 260 261 /** 262 * Returns the screen resolution in dots-per-inch. 263 * @return this toolkit's screen resolution, in dots-per-inch. 264 * @exception HeadlessException if GraphicsEnvironment.isHeadless() 265 * returns true 266 * @see java.awt.GraphicsEnvironment#isHeadless 267 */ 268 public abstract int getScreenResolution() 269 throws HeadlessException; 270 271 /** 272 * Gets the insets of the screen. 273 * @param gc a {@code GraphicsConfiguration} 274 * @return the insets of this toolkit's screen, in pixels. 275 * @exception HeadlessException if GraphicsEnvironment.isHeadless() 276 * returns true 277 * @see java.awt.GraphicsEnvironment#isHeadless 278 * @since 1.4 279 */ 280 public Insets getScreenInsets(GraphicsConfiguration gc) 281 throws HeadlessException { 282 GraphicsEnvironment.checkHeadless(); 283 if (this != Toolkit.getDefaultToolkit()) { 284 return Toolkit.getDefaultToolkit().getScreenInsets(gc); 285 } else { 286 return new Insets(0, 0, 0, 0); 287 } 288 } 289 290 /** 291 * Determines the color model of this toolkit's screen. 292 * <p> 293 * {@code ColorModel} is an abstract class that 294 * encapsulates the ability to translate between the 295 * pixel values of an image and its red, green, blue, 296 * and alpha components. 297 * <p> 298 * This toolkit method is called by the 299 * {@code getColorModel} method 300 * of the {@code Component} class. 301 * @return the color model of this toolkit's screen. 302 * @exception HeadlessException if GraphicsEnvironment.isHeadless() 303 * returns true 304 * @see java.awt.GraphicsEnvironment#isHeadless 305 * @see java.awt.image.ColorModel 306 * @see java.awt.Component#getColorModel 307 */ 308 public abstract ColorModel getColorModel() 309 throws HeadlessException; 310 311 /** 312 * Returns the names of the available fonts in this toolkit.<p> 313 * For 1.1, the following font names are deprecated (the replacement 314 * name follows): 315 * <ul> 316 * <li>TimesRoman (use Serif) 317 * <li>Helvetica (use SansSerif) 318 * <li>Courier (use Monospaced) 319 * </ul><p> 320 * The ZapfDingbats fontname is also deprecated in 1.1 but the characters 321 * are defined in Unicode starting at 0x2700, and as of 1.1 Java supports 322 * those characters. 323 * @return the names of the available fonts in this toolkit. 324 * @deprecated see {@link java.awt.GraphicsEnvironment#getAvailableFontFamilyNames()} 325 * @see java.awt.GraphicsEnvironment#getAvailableFontFamilyNames() 326 */ 327 @Deprecated 328 public abstract String[] getFontList(); 329 330 /** 331 * Gets the screen device metrics for rendering of the font. 332 * @param font a font 333 * @return the screen metrics of the specified font in this toolkit 334 * @deprecated As of JDK version 1.2, replaced by the {@code Font} 335 * method {@code getLineMetrics}. 336 * @see java.awt.font.LineMetrics 337 * @see java.awt.Font#getLineMetrics 338 * @see java.awt.GraphicsEnvironment#getScreenDevices 339 */ 340 @Deprecated 341 public abstract FontMetrics getFontMetrics(Font font); 342 343 /** 344 * Synchronizes this toolkit's graphics state. Some window systems 345 * may do buffering of graphics events. 346 * <p> 347 * This method ensures that the display is up-to-date. It is useful 348 * for animation. 349 */ 350 public abstract void sync(); 351 352 /** 353 * The default toolkit. 354 */ 355 private static Toolkit toolkit; 356 357 /** 358 * Used internally by the assistive technologies functions; set at 359 * init time and used at load time 360 */ 361 private static String atNames; 362 363 /** 364 * Initializes properties related to assistive technologies. 365 * These properties are used both in the loadAssistiveProperties() 366 * function below, as well as other classes in the jdk that depend 367 * on the properties (such as the use of the screen_magnifier_present 368 * property in Java2D hardware acceleration initialization). The 369 * initialization of the properties must be done before the platform- 370 * specific Toolkit class is instantiated so that all necessary 371 * properties are set up properly before any classes dependent upon them 372 * are initialized. 373 */ 374 private static void initAssistiveTechnologies() { 375 376 // Get accessibility properties 377 final String sep = File.separator; 378 final Properties properties = new Properties(); 379 380 381 atNames = java.security.AccessController.doPrivileged( 382 new java.security.PrivilegedAction<String>() { 383 public String run() { 384 385 // Try loading the per-user accessibility properties file. 386 try { 387 File propsFile = new File( 388 System.getProperty("user.home") + 389 sep + ".accessibility.properties"); 390 FileInputStream in = 391 new FileInputStream(propsFile); 392 393 // Inputstream has been buffered in Properties class 394 properties.load(in); 395 in.close(); 396 } catch (Exception e) { 397 // Per-user accessibility properties file does not exist 398 } 399 400 // Try loading the system-wide accessibility properties 401 // file only if a per-user accessibility properties 402 // file does not exist or is empty. 403 if (properties.size() == 0) { 404 try { 405 File propsFile = new File( 406 System.getProperty("java.home") + sep + "conf" + 407 sep + "accessibility.properties"); 408 FileInputStream in = 409 new FileInputStream(propsFile); 410 411 // Inputstream has been buffered in Properties class 412 properties.load(in); 413 in.close(); 414 } catch (Exception e) { 415 // System-wide accessibility properties file does 416 // not exist; 417 } 418 } 419 420 // Get whether a screen magnifier is present. First check 421 // the system property and then check the properties file. 422 String magPresent = System.getProperty("javax.accessibility.screen_magnifier_present"); 423 if (magPresent == null) { 424 magPresent = properties.getProperty("screen_magnifier_present", null); 425 if (magPresent != null) { 426 System.setProperty("javax.accessibility.screen_magnifier_present", magPresent); 427 } 428 } 429 430 // Get the names of any assistive technologies to load. First 431 // check the system property and then check the properties 432 // file. 433 String classNames = System.getProperty("javax.accessibility.assistive_technologies"); 434 if (classNames == null) { 435 classNames = properties.getProperty("assistive_technologies", null); 436 if (classNames != null) { 437 System.setProperty("javax.accessibility.assistive_technologies", classNames); 438 } 439 } 440 return classNames; 441 } 442 }); 443 } 444 445 /** 446 * Rethrow the AWTError but include the cause. 447 * 448 * @param s the error message 449 * @param e the original exception 450 * @throws the new AWTError including the cause (the original exception) 451 */ 452 private static void newAWTError(Throwable e, String s) { 453 AWTError newAWTError = new AWTError(s); 454 newAWTError.initCause(e); 455 throw newAWTError; 456 } 457 458 /** 459 * When a service provider for Assistive Technology is not found look for a 460 * supporting class on the class path and instantiate it. 461 * 462 * @param atName the name of the class to be loaded 463 */ 464 private static void fallbackToLoadClassForAT(String atName) { 465 try { 466 @SuppressWarnings("deprecation") 467 Object o = Class.forName(atName, 468 false, 469 ClassLoader.getSystemClassLoader()).newInstance(); 470 } catch (ClassNotFoundException e) { 471 newAWTError(e, "Assistive Technology not found: " + atName); 472 } catch (InstantiationException e) { 473 newAWTError(e, "Could not instantiate Assistive Technology: " + atName); 474 } catch (IllegalAccessException e) { 475 newAWTError(e, "Could not access Assistive Technology: " + atName); 476 } catch (Exception e) { 477 newAWTError(e, "Error trying to install Assistive Technology: " + atName); 478 } 479 } 480 481 /** 482 * Loads accessibility support using the property assistive_technologies. 483 * The form is assistive_technologies= followed by a comma-separated list of 484 * assistive technology providers to load. The order in which providers are 485 * loaded is determined by the order in which the ServiceLoader discovers 486 * implementations of the AccessibilityProvider interface, not by the order 487 * of provider names in the property list. When a provider is found its 488 * accessibility implementation will be started by calling the provider's 489 * activate method. All errors are handled via an AWTError exception. 490 */ 491 private static void loadAssistiveTechnologies() { 492 // Load any assistive technologies 493 if (atNames != null) { 494 ClassLoader cl = ClassLoader.getSystemClassLoader(); 495 Set<String> names = Arrays.stream(atNames.split(",")) 496 .map(String::trim) 497 .collect(Collectors.toSet()); 498 final Map<String, AccessibilityProvider> providers = new HashMap<>(); 499 AccessController.doPrivileged((PrivilegedAction<Void>) () -> { 500 try { 501 for (AccessibilityProvider p : ServiceLoader.load(AccessibilityProvider.class, cl)) { 502 String name = p.getName(); 503 if (names.contains(name) && !providers.containsKey(name)) { 504 p.activate(); 505 providers.put(name, p); 506 } 507 } 508 } catch (java.util.ServiceConfigurationError | Exception e) { 509 newAWTError(e, "Could not load or activate service provider"); 510 } 511 return null; 512 }); 513 names.stream() 514 .filter(n -> !providers.containsKey(n)) 515 .forEach(Toolkit::fallbackToLoadClassForAT); 516 } 517 } 518 519 /** 520 * Gets the default toolkit. 521 * <p> 522 * If a system property named {@code "java.awt.headless"} is set 523 * to {@code true} then the headless implementation 524 * of {@code Toolkit} is used, 525 * otherwise the default platform-specific implementation of 526 * {@code Toolkit} is used. 527 * <p> 528 * If this Toolkit is not a headless implementation and if they exist, service 529 * providers of {@link javax.accessibility.AccessibilityProvider} will be loaded 530 * if specified by the system property 531 * {@code javax.accessibility.assistive_technologies}. 532 * <p> 533 * An example of setting this property is to invoke Java with 534 * {@code -Djavax.accessibility.assistive_technologies=MyServiceProvider}. 535 * In addition to MyServiceProvider other service providers can be specified 536 * using a comma separated list. Service providers are loaded after the AWT 537 * toolkit is created. All errors are handled via an AWTError exception. 538 * <p> 539 * The names specified in the assistive_technologies property are used to query 540 * each service provider implementation. If the requested name matches the 541 * {@linkplain AccessibilityProvider#getName name} of the service provider, the 542 * {@link AccessibilityProvider#activate} method will be invoked to activate the 543 * matching service provider. 544 * 545 * @implSpec 546 * If assistive technology service providers are not specified with a system 547 * property this implementation will look in a properties file located as follows: 548 * <ul> 549 * <li> {@code ${user.home}/.accessibility.properties} 550 * <li> {@code ${java.home}/conf/accessibility.properties} 551 * </ul> 552 * Only the first of these files to be located will be consulted. The requested 553 * service providers are specified by setting the {@code assistive_technologies=} 554 * property. A single provider or a comma separated list of providers can be 555 * specified. 556 * 557 * @return the default toolkit. 558 * @exception AWTError if a toolkit could not be found, or 559 * if one could not be accessed or instantiated. 560 * @see java.util.ServiceLoader 561 * @see javax.accessibility.AccessibilityProvider 562 */ 563 public static synchronized Toolkit getDefaultToolkit() { 564 if (toolkit == null) { 565 java.security.AccessController.doPrivileged( 566 new java.security.PrivilegedAction<Void>() { 567 public Void run() { 568 Class<?> cls = null; 569 String nm = System.getProperty("awt.toolkit"); 570 try { 571 cls = Class.forName(nm); 572 } catch (ClassNotFoundException e) { 573 ClassLoader cl = ClassLoader.getSystemClassLoader(); 574 if (cl != null) { 575 try { 576 cls = cl.loadClass(nm); 577 } catch (final ClassNotFoundException ignored) { 578 throw new AWTError("Toolkit not found: " + nm); 579 } 580 } 581 } 582 try { 583 if (cls != null) { 584 @SuppressWarnings("deprecation") 585 Object tmp = cls.newInstance(); 586 toolkit = (Toolkit)tmp; 587 if (GraphicsEnvironment.isHeadless()) { 588 toolkit = new HeadlessToolkit(toolkit); 589 } 590 } 591 } catch (final InstantiationException ignored) { 592 throw new AWTError("Could not instantiate Toolkit: " + nm); 593 } catch (final IllegalAccessException ignored) { 594 throw new AWTError("Could not access Toolkit: " + nm); 595 } 596 return null; 597 } 598 }); 599 if (!GraphicsEnvironment.isHeadless()) { 600 loadAssistiveTechnologies(); 601 } 602 } 603 return toolkit; 604 } 605 606 /** 607 * Returns an image which gets pixel data from the specified file, 608 * whose format can be either GIF, JPEG or PNG. 609 * The underlying toolkit attempts to resolve multiple requests 610 * with the same filename to the same returned Image. 611 * <p> 612 * Since the mechanism required to facilitate this sharing of 613 * {@code Image} objects may continue to hold onto images 614 * that are no longer in use for an indefinite period of time, 615 * developers are encouraged to implement their own caching of 616 * images by using the {@link #createImage(java.lang.String) createImage} 617 * variant wherever available. 618 * If the image data contained in the specified file changes, 619 * the {@code Image} object returned from this method may 620 * still contain stale information which was loaded from the 621 * file after a prior call. 622 * Previously loaded image data can be manually discarded by 623 * calling the {@link Image#flush flush} method on the 624 * returned {@code Image}. 625 * <p> 626 * This method first checks if there is a security manager installed. 627 * If so, the method calls the security manager's 628 * {@code checkRead} method with the file specified to ensure 629 * that the access to the image is allowed. 630 * @param filename the name of a file containing pixel data 631 * in a recognized file format. 632 * @return an image which gets its pixel data from 633 * the specified file. 634 * @throws SecurityException if a security manager exists and its 635 * checkRead method doesn't allow the operation. 636 * @see #createImage(java.lang.String) 637 */ 638 public abstract Image getImage(String filename); 639 640 /** 641 * Returns an image which gets pixel data from the specified URL. 642 * The pixel data referenced by the specified URL must be in one 643 * of the following formats: GIF, JPEG or PNG. 644 * The underlying toolkit attempts to resolve multiple requests 645 * with the same URL to the same returned Image. 646 * <p> 647 * Since the mechanism required to facilitate this sharing of 648 * {@code Image} objects may continue to hold onto images 649 * that are no longer in use for an indefinite period of time, 650 * developers are encouraged to implement their own caching of 651 * images by using the {@link #createImage(java.net.URL) createImage} 652 * variant wherever available. 653 * If the image data stored at the specified URL changes, 654 * the {@code Image} object returned from this method may 655 * still contain stale information which was fetched from the 656 * URL after a prior call. 657 * Previously loaded image data can be manually discarded by 658 * calling the {@link Image#flush flush} method on the 659 * returned {@code Image}. 660 * <p> 661 * This method first checks if there is a security manager installed. 662 * If so, the method calls the security manager's 663 * {@code checkPermission} method with the 664 * url.openConnection().getPermission() permission to ensure 665 * that the access to the image is allowed. For compatibility 666 * with pre-1.2 security managers, if the access is denied with 667 * {@code FilePermission} or {@code SocketPermission}, 668 * the method throws the {@code SecurityException} 669 * if the corresponding 1.1-style SecurityManager.checkXXX method 670 * also denies permission. 671 * @param url the URL to use in fetching the pixel data. 672 * @return an image which gets its pixel data from 673 * the specified URL. 674 * @throws SecurityException if a security manager exists and its 675 * checkPermission method doesn't allow 676 * the operation. 677 * @see #createImage(java.net.URL) 678 */ 679 public abstract Image getImage(URL url); 680 681 /** 682 * Returns an image which gets pixel data from the specified file. 683 * The returned Image is a new object which will not be shared 684 * with any other caller of this method or its getImage variant. 685 * <p> 686 * This method first checks if there is a security manager installed. 687 * If so, the method calls the security manager's 688 * {@code checkRead} method with the specified file to ensure 689 * that the image creation is allowed. 690 * @param filename the name of a file containing pixel data 691 * in a recognized file format. 692 * @return an image which gets its pixel data from 693 * the specified file. 694 * @throws SecurityException if a security manager exists and its 695 * checkRead method doesn't allow the operation. 696 * @see #getImage(java.lang.String) 697 */ 698 public abstract Image createImage(String filename); 699 700 /** 701 * Returns an image which gets pixel data from the specified URL. 702 * The returned Image is a new object which will not be shared 703 * with any other caller of this method or its getImage variant. 704 * <p> 705 * This method first checks if there is a security manager installed. 706 * If so, the method calls the security manager's 707 * {@code checkPermission} method with the 708 * url.openConnection().getPermission() permission to ensure 709 * that the image creation is allowed. For compatibility 710 * with pre-1.2 security managers, if the access is denied with 711 * {@code FilePermission} or {@code SocketPermission}, 712 * the method throws {@code SecurityException} 713 * if the corresponding 1.1-style SecurityManager.checkXXX method 714 * also denies permission. 715 * @param url the URL to use in fetching the pixel data. 716 * @return an image which gets its pixel data from 717 * the specified URL. 718 * @throws SecurityException if a security manager exists and its 719 * checkPermission method doesn't allow 720 * the operation. 721 * @see #getImage(java.net.URL) 722 */ 723 public abstract Image createImage(URL url); 724 725 /** 726 * Prepares an image for rendering. 727 * <p> 728 * If the values of the width and height arguments are both 729 * {@code -1}, this method prepares the image for rendering 730 * on the default screen; otherwise, this method prepares an image 731 * for rendering on the default screen at the specified width and height. 732 * <p> 733 * The image data is downloaded asynchronously in another thread, 734 * and an appropriately scaled screen representation of the image is 735 * generated. 736 * <p> 737 * This method is called by components {@code prepareImage} 738 * methods. 739 * <p> 740 * Information on the flags returned by this method can be found 741 * with the definition of the {@code ImageObserver} interface. 742 743 * @param image the image for which to prepare a 744 * screen representation. 745 * @param width the width of the desired screen 746 * representation, or {@code -1}. 747 * @param height the height of the desired screen 748 * representation, or {@code -1}. 749 * @param observer the {@code ImageObserver} 750 * object to be notified as the 751 * image is being prepared. 752 * @return {@code true} if the image has already been 753 * fully prepared; {@code false} otherwise. 754 * @see java.awt.Component#prepareImage(java.awt.Image, 755 * java.awt.image.ImageObserver) 756 * @see java.awt.Component#prepareImage(java.awt.Image, 757 * int, int, java.awt.image.ImageObserver) 758 * @see java.awt.image.ImageObserver 759 */ 760 public abstract boolean prepareImage(Image image, int width, int height, 761 ImageObserver observer); 762 763 /** 764 * Indicates the construction status of a specified image that is 765 * being prepared for display. 766 * <p> 767 * If the values of the width and height arguments are both 768 * {@code -1}, this method returns the construction status of 769 * a screen representation of the specified image in this toolkit. 770 * Otherwise, this method returns the construction status of a 771 * scaled representation of the image at the specified width 772 * and height. 773 * <p> 774 * This method does not cause the image to begin loading. 775 * An application must call {@code prepareImage} to force 776 * the loading of an image. 777 * <p> 778 * This method is called by the component's {@code checkImage} 779 * methods. 780 * <p> 781 * Information on the flags returned by this method can be found 782 * with the definition of the {@code ImageObserver} interface. 783 * @param image the image whose status is being checked. 784 * @param width the width of the scaled version whose status is 785 * being checked, or {@code -1}. 786 * @param height the height of the scaled version whose status 787 * is being checked, or {@code -1}. 788 * @param observer the {@code ImageObserver} object to be 789 * notified as the image is being prepared. 790 * @return the bitwise inclusive <strong>OR</strong> of the 791 * {@code ImageObserver} flags for the 792 * image data that is currently available. 793 * @see java.awt.Toolkit#prepareImage(java.awt.Image, 794 * int, int, java.awt.image.ImageObserver) 795 * @see java.awt.Component#checkImage(java.awt.Image, 796 * java.awt.image.ImageObserver) 797 * @see java.awt.Component#checkImage(java.awt.Image, 798 * int, int, java.awt.image.ImageObserver) 799 * @see java.awt.image.ImageObserver 800 */ 801 public abstract int checkImage(Image image, int width, int height, 802 ImageObserver observer); 803 804 /** 805 * Creates an image with the specified image producer. 806 * @param producer the image producer to be used. 807 * @return an image with the specified image producer. 808 * @see java.awt.Image 809 * @see java.awt.image.ImageProducer 810 * @see java.awt.Component#createImage(java.awt.image.ImageProducer) 811 */ 812 public abstract Image createImage(ImageProducer producer); 813 814 /** 815 * Creates an image which decodes the image stored in the specified 816 * byte array. 817 * <p> 818 * The data must be in some image format, such as GIF or JPEG, 819 * that is supported by this toolkit. 820 * @param imagedata an array of bytes, representing 821 * image data in a supported image format. 822 * @return an image. 823 * @since 1.1 824 */ 825 public Image createImage(byte[] imagedata) { 826 return createImage(imagedata, 0, imagedata.length); 827 } 828 829 /** 830 * Creates an image which decodes the image stored in the specified 831 * byte array, and at the specified offset and length. 832 * The data must be in some image format, such as GIF or JPEG, 833 * that is supported by this toolkit. 834 * @param imagedata an array of bytes, representing 835 * image data in a supported image format. 836 * @param imageoffset the offset of the beginning 837 * of the data in the array. 838 * @param imagelength the length of the data in the array. 839 * @return an image. 840 * @since 1.1 841 */ 842 public abstract Image createImage(byte[] imagedata, 843 int imageoffset, 844 int imagelength); 845 846 /** 847 * Gets a {@code PrintJob} object which is the result of initiating 848 * a print operation on the toolkit's platform. 849 * <p> 850 * Each actual implementation of this method should first check if there 851 * is a security manager installed. If there is, the method should call 852 * the security manager's {@code checkPrintJobAccess} method to 853 * ensure initiation of a print operation is allowed. If the default 854 * implementation of {@code checkPrintJobAccess} is used (that is, 855 * that method is not overriden), then this results in a call to the 856 * security manager's {@code checkPermission} method with a 857 * {@code RuntimePermission("queuePrintJob")} permission. 858 * 859 * @param frame the parent of the print dialog. May not be null. 860 * @param jobtitle the title of the PrintJob. A null title is equivalent 861 * to "". 862 * @param props a Properties object containing zero or more properties. 863 * Properties are not standardized and are not consistent across 864 * implementations. Because of this, PrintJobs which require job 865 * and page control should use the version of this function which 866 * takes JobAttributes and PageAttributes objects. This object 867 * may be updated to reflect the user's job choices on exit. May 868 * be null. 869 * @return a {@code PrintJob} object, or {@code null} if the 870 * user cancelled the print job. 871 * @throws NullPointerException if frame is null 872 * @throws SecurityException if this thread is not allowed to initiate a 873 * print job request 874 * @see java.awt.GraphicsEnvironment#isHeadless 875 * @see java.awt.PrintJob 876 * @see java.lang.RuntimePermission 877 * @since 1.1 878 */ 879 public abstract PrintJob getPrintJob(Frame frame, String jobtitle, 880 Properties props); 881 882 /** 883 * Gets a {@code PrintJob} object which is the result of initiating 884 * a print operation on the toolkit's platform. 885 * <p> 886 * Each actual implementation of this method should first check if there 887 * is a security manager installed. If there is, the method should call 888 * the security manager's {@code checkPrintJobAccess} method to 889 * ensure initiation of a print operation is allowed. If the default 890 * implementation of {@code checkPrintJobAccess} is used (that is, 891 * that method is not overriden), then this results in a call to the 892 * security manager's {@code checkPermission} method with a 893 * {@code RuntimePermission("queuePrintJob")} permission. 894 * 895 * @param frame the parent of the print dialog. May not be null. 896 * @param jobtitle the title of the PrintJob. A null title is equivalent 897 * to "". 898 * @param jobAttributes a set of job attributes which will control the 899 * PrintJob. The attributes will be updated to reflect the user's 900 * choices as outlined in the JobAttributes documentation. May be 901 * null. 902 * @param pageAttributes a set of page attributes which will control the 903 * PrintJob. The attributes will be applied to every page in the 904 * job. The attributes will be updated to reflect the user's 905 * choices as outlined in the PageAttributes documentation. May be 906 * null. 907 * @return a {@code PrintJob} object, or {@code null} if the 908 * user cancelled the print job. 909 * @throws NullPointerException if frame is null 910 * @throws IllegalArgumentException if pageAttributes specifies differing 911 * cross feed and feed resolutions. Also if this thread has 912 * access to the file system and jobAttributes specifies 913 * print to file, and the specified destination file exists but 914 * is a directory rather than a regular file, does not exist but 915 * cannot be created, or cannot be opened for any other reason. 916 * However in the case of print to file, if a dialog is also 917 * requested to be displayed then the user will be given an 918 * opportunity to select a file and proceed with printing. 919 * The dialog will ensure that the selected output file 920 * is valid before returning from this method. 921 * @throws SecurityException if this thread is not allowed to initiate a 922 * print job request, or if jobAttributes specifies print to file, 923 * and this thread is not allowed to access the file system 924 * @see java.awt.PrintJob 925 * @see java.awt.GraphicsEnvironment#isHeadless 926 * @see java.lang.RuntimePermission 927 * @see java.awt.JobAttributes 928 * @see java.awt.PageAttributes 929 * @since 1.3 930 */ 931 public PrintJob getPrintJob(Frame frame, String jobtitle, 932 JobAttributes jobAttributes, 933 PageAttributes pageAttributes) { 934 // Override to add printing support with new job/page control classes 935 936 if (this != Toolkit.getDefaultToolkit()) { 937 return Toolkit.getDefaultToolkit().getPrintJob(frame, jobtitle, 938 jobAttributes, 939 pageAttributes); 940 } else { 941 return getPrintJob(frame, jobtitle, null); 942 } 943 } 944 945 /** 946 * Emits an audio beep depending on native system settings and hardware 947 * capabilities. 948 * @since 1.1 949 */ 950 public abstract void beep(); 951 952 /** 953 * Gets the singleton instance of the system Clipboard which interfaces 954 * with clipboard facilities provided by the native platform. This 955 * clipboard enables data transfer between Java programs and native 956 * applications which use native clipboard facilities. 957 * <p> 958 * In addition to any and all default formats text returned by the system 959 * Clipboard's {@code getTransferData()} method is available in the 960 * following flavors: 961 * <ul> 962 * <li>DataFlavor.stringFlavor</li> 963 * <li>DataFlavor.plainTextFlavor (<b>deprecated</b>)</li> 964 * </ul> 965 * As with {@code java.awt.datatransfer.StringSelection}, if the 966 * requested flavor is {@code DataFlavor.plainTextFlavor}, or an 967 * equivalent flavor, a Reader is returned. <b>Note:</b> The behavior of 968 * the system Clipboard's {@code getTransferData()} method for 969 * {@code DataFlavor.plainTextFlavor}, and equivalent DataFlavors, is 970 * inconsistent with the definition of {@code DataFlavor.plainTextFlavor}. 971 * Because of this, support for 972 * {@code DataFlavor.plainTextFlavor}, and equivalent flavors, is 973 * <b>deprecated</b>. 974 * <p> 975 * Each actual implementation of this method should first check if there 976 * is a security manager installed. If there is, the method should call 977 * the security manager's {@link SecurityManager#checkPermission 978 * checkPermission} method to check {@code AWTPermission("accessClipboard")}. 979 * 980 * @return the system Clipboard 981 * @exception HeadlessException if GraphicsEnvironment.isHeadless() 982 * returns true 983 * @see java.awt.GraphicsEnvironment#isHeadless 984 * @see java.awt.datatransfer.Clipboard 985 * @see java.awt.datatransfer.StringSelection 986 * @see java.awt.datatransfer.DataFlavor#stringFlavor 987 * @see java.awt.datatransfer.DataFlavor#plainTextFlavor 988 * @see java.io.Reader 989 * @see java.awt.AWTPermission 990 * @since 1.1 991 */ 992 public abstract Clipboard getSystemClipboard() 993 throws HeadlessException; 994 995 /** 996 * Gets the singleton instance of the system selection as a 997 * {@code Clipboard} object. This allows an application to read and 998 * modify the current, system-wide selection. 999 * <p> 1000 * An application is responsible for updating the system selection whenever 1001 * the user selects text, using either the mouse or the keyboard. 1002 * Typically, this is implemented by installing a 1003 * {@code FocusListener} on all {@code Component}s which support 1004 * text selection, and, between {@code FOCUS_GAINED} and 1005 * {@code FOCUS_LOST} events delivered to that {@code Component}, 1006 * updating the system selection {@code Clipboard} when the selection 1007 * changes inside the {@code Component}. Properly updating the system 1008 * selection ensures that a Java application will interact correctly with 1009 * native applications and other Java applications running simultaneously 1010 * on the system. Note that {@code java.awt.TextComponent} and 1011 * {@code javax.swing.text.JTextComponent} already adhere to this 1012 * policy. When using these classes, and their subclasses, developers need 1013 * not write any additional code. 1014 * <p> 1015 * Some platforms do not support a system selection {@code Clipboard}. 1016 * On those platforms, this method will return {@code null}. In such a 1017 * case, an application is absolved from its responsibility to update the 1018 * system selection {@code Clipboard} as described above. 1019 * <p> 1020 * Each actual implementation of this method should first check if there 1021 * is a security manager installed. If there is, the method should call 1022 * the security manager's {@link SecurityManager#checkPermission 1023 * checkPermission} method to check {@code AWTPermission("accessClipboard")}. 1024 * 1025 * @return the system selection as a {@code Clipboard}, or 1026 * {@code null} if the native platform does not support a 1027 * system selection {@code Clipboard} 1028 * @exception HeadlessException if GraphicsEnvironment.isHeadless() 1029 * returns true 1030 * 1031 * @see java.awt.datatransfer.Clipboard 1032 * @see java.awt.event.FocusListener 1033 * @see java.awt.event.FocusEvent#FOCUS_GAINED 1034 * @see java.awt.event.FocusEvent#FOCUS_LOST 1035 * @see TextComponent 1036 * @see javax.swing.text.JTextComponent 1037 * @see AWTPermission 1038 * @see GraphicsEnvironment#isHeadless 1039 * @since 1.4 1040 */ 1041 public Clipboard getSystemSelection() throws HeadlessException { 1042 GraphicsEnvironment.checkHeadless(); 1043 1044 if (this != Toolkit.getDefaultToolkit()) { 1045 return Toolkit.getDefaultToolkit().getSystemSelection(); 1046 } else { 1047 GraphicsEnvironment.checkHeadless(); 1048 return null; 1049 } 1050 } 1051 1052 /** 1053 * Determines which modifier key is the appropriate accelerator 1054 * key for menu shortcuts. 1055 * <p> 1056 * Menu shortcuts, which are embodied in the 1057 * {@code MenuShortcut} class, are handled by the 1058 * {@code MenuBar} class. 1059 * <p> 1060 * By default, this method returns {@code Event.CTRL_MASK}. 1061 * Toolkit implementations should override this method if the 1062 * <b>Control</b> key isn't the correct key for accelerators. 1063 * @return the modifier mask on the {@code Event} class 1064 * that is used for menu shortcuts on this toolkit. 1065 * @exception HeadlessException if GraphicsEnvironment.isHeadless() 1066 * returns true 1067 * @see java.awt.GraphicsEnvironment#isHeadless 1068 * @see java.awt.MenuBar 1069 * @see java.awt.MenuShortcut 1070 * @since 1.1 1071 */ 1072 public int getMenuShortcutKeyMask() throws HeadlessException { 1073 GraphicsEnvironment.checkHeadless(); 1074 1075 return Event.CTRL_MASK; 1076 } 1077 1078 /** 1079 * Returns whether the given locking key on the keyboard is currently in 1080 * its "on" state. 1081 * Valid key codes are 1082 * {@link java.awt.event.KeyEvent#VK_CAPS_LOCK VK_CAPS_LOCK}, 1083 * {@link java.awt.event.KeyEvent#VK_NUM_LOCK VK_NUM_LOCK}, 1084 * {@link java.awt.event.KeyEvent#VK_SCROLL_LOCK VK_SCROLL_LOCK}, and 1085 * {@link java.awt.event.KeyEvent#VK_KANA_LOCK VK_KANA_LOCK}. 1086 * 1087 * @param keyCode the key code 1088 * @return {@code true} if the given key is currently in its "on" state; 1089 * otherwise {@code false} 1090 * @exception java.lang.IllegalArgumentException if {@code keyCode} 1091 * is not one of the valid key codes 1092 * @exception java.lang.UnsupportedOperationException if the host system doesn't 1093 * allow getting the state of this key programmatically, or if the keyboard 1094 * doesn't have this key 1095 * @exception HeadlessException if GraphicsEnvironment.isHeadless() 1096 * returns true 1097 * @see java.awt.GraphicsEnvironment#isHeadless 1098 * @since 1.3 1099 */ 1100 public boolean getLockingKeyState(int keyCode) 1101 throws UnsupportedOperationException 1102 { 1103 GraphicsEnvironment.checkHeadless(); 1104 1105 if (! (keyCode == KeyEvent.VK_CAPS_LOCK || keyCode == KeyEvent.VK_NUM_LOCK || 1106 keyCode == KeyEvent.VK_SCROLL_LOCK || keyCode == KeyEvent.VK_KANA_LOCK)) { 1107 throw new IllegalArgumentException("invalid key for Toolkit.getLockingKeyState"); 1108 } 1109 throw new UnsupportedOperationException("Toolkit.getLockingKeyState"); 1110 } 1111 1112 /** 1113 * Sets the state of the given locking key on the keyboard. 1114 * Valid key codes are 1115 * {@link java.awt.event.KeyEvent#VK_CAPS_LOCK VK_CAPS_LOCK}, 1116 * {@link java.awt.event.KeyEvent#VK_NUM_LOCK VK_NUM_LOCK}, 1117 * {@link java.awt.event.KeyEvent#VK_SCROLL_LOCK VK_SCROLL_LOCK}, and 1118 * {@link java.awt.event.KeyEvent#VK_KANA_LOCK VK_KANA_LOCK}. 1119 * <p> 1120 * Depending on the platform, setting the state of a locking key may 1121 * involve event processing and therefore may not be immediately 1122 * observable through getLockingKeyState. 1123 * 1124 * @param keyCode the key code 1125 * @param on the state of the key 1126 * @exception java.lang.IllegalArgumentException if {@code keyCode} 1127 * is not one of the valid key codes 1128 * @exception java.lang.UnsupportedOperationException if the host system doesn't 1129 * allow setting the state of this key programmatically, or if the keyboard 1130 * doesn't have this key 1131 * @exception HeadlessException if GraphicsEnvironment.isHeadless() 1132 * returns true 1133 * @see java.awt.GraphicsEnvironment#isHeadless 1134 * @since 1.3 1135 */ 1136 public void setLockingKeyState(int keyCode, boolean on) 1137 throws UnsupportedOperationException 1138 { 1139 GraphicsEnvironment.checkHeadless(); 1140 1141 if (! (keyCode == KeyEvent.VK_CAPS_LOCK || keyCode == KeyEvent.VK_NUM_LOCK || 1142 keyCode == KeyEvent.VK_SCROLL_LOCK || keyCode == KeyEvent.VK_KANA_LOCK)) { 1143 throw new IllegalArgumentException("invalid key for Toolkit.setLockingKeyState"); 1144 } 1145 throw new UnsupportedOperationException("Toolkit.setLockingKeyState"); 1146 } 1147 1148 /** 1149 * Give native peers the ability to query the native container 1150 * given a native component (eg the direct parent may be lightweight). 1151 * 1152 * @param c the component to fetch the container for 1153 * @return the native container object for the component 1154 */ 1155 protected static Container getNativeContainer(Component c) { 1156 return c.getNativeContainer(); 1157 } 1158 1159 /** 1160 * Creates a new custom cursor object. 1161 * If the image to display is invalid, the cursor will be hidden (made 1162 * completely transparent), and the hotspot will be set to (0, 0). 1163 * 1164 * <p>Note that multi-frame images are invalid and may cause this 1165 * method to hang. 1166 * 1167 * @param cursor the image to display when the cursor is activated 1168 * @param hotSpot the X and Y of the large cursor's hot spot; the 1169 * hotSpot values must be less than the Dimension returned by 1170 * {@code getBestCursorSize} 1171 * @param name a localized description of the cursor, for Java Accessibility use 1172 * @exception IndexOutOfBoundsException if the hotSpot values are outside 1173 * the bounds of the cursor 1174 * @return the cursor created 1175 * @exception HeadlessException if GraphicsEnvironment.isHeadless() 1176 * returns true 1177 * @see java.awt.GraphicsEnvironment#isHeadless 1178 * @since 1.2 1179 */ 1180 public Cursor createCustomCursor(Image cursor, Point hotSpot, String name) 1181 throws IndexOutOfBoundsException, HeadlessException 1182 { 1183 // Override to implement custom cursor support. 1184 if (this != Toolkit.getDefaultToolkit()) { 1185 return Toolkit.getDefaultToolkit(). 1186 createCustomCursor(cursor, hotSpot, name); 1187 } else { 1188 return new Cursor(Cursor.DEFAULT_CURSOR); 1189 } 1190 } 1191 1192 /** 1193 * Returns the supported cursor dimension which is closest to the desired 1194 * sizes. Systems which only support a single cursor size will return that 1195 * size regardless of the desired sizes. Systems which don't support custom 1196 * cursors will return a dimension of 0, 0. <p> 1197 * Note: if an image is used whose dimensions don't match a supported size 1198 * (as returned by this method), the Toolkit implementation will attempt to 1199 * resize the image to a supported size. 1200 * Since converting low-resolution images is difficult, 1201 * no guarantees are made as to the quality of a cursor image which isn't a 1202 * supported size. It is therefore recommended that this method 1203 * be called and an appropriate image used so no image conversion is made. 1204 * 1205 * @param preferredWidth the preferred cursor width the component would like 1206 * to use. 1207 * @param preferredHeight the preferred cursor height the component would like 1208 * to use. 1209 * @return the closest matching supported cursor size, or a dimension of 0,0 if 1210 * the Toolkit implementation doesn't support custom cursors. 1211 * @exception HeadlessException if GraphicsEnvironment.isHeadless() 1212 * returns true 1213 * @see java.awt.GraphicsEnvironment#isHeadless 1214 * @since 1.2 1215 */ 1216 public Dimension getBestCursorSize(int preferredWidth, 1217 int preferredHeight) throws HeadlessException { 1218 GraphicsEnvironment.checkHeadless(); 1219 1220 // Override to implement custom cursor support. 1221 if (this != Toolkit.getDefaultToolkit()) { 1222 return Toolkit.getDefaultToolkit(). 1223 getBestCursorSize(preferredWidth, preferredHeight); 1224 } else { 1225 return new Dimension(0, 0); 1226 } 1227 } 1228 1229 /** 1230 * Returns the maximum number of colors the Toolkit supports in a custom cursor 1231 * palette.<p> 1232 * Note: if an image is used which has more colors in its palette than 1233 * the supported maximum, the Toolkit implementation will attempt to flatten the 1234 * palette to the maximum. Since converting low-resolution images is difficult, 1235 * no guarantees are made as to the quality of a cursor image which has more 1236 * colors than the system supports. It is therefore recommended that this method 1237 * be called and an appropriate image used so no image conversion is made. 1238 * 1239 * @return the maximum number of colors, or zero if custom cursors are not 1240 * supported by this Toolkit implementation. 1241 * @exception HeadlessException if GraphicsEnvironment.isHeadless() 1242 * returns true 1243 * @see java.awt.GraphicsEnvironment#isHeadless 1244 * @since 1.2 1245 */ 1246 public int getMaximumCursorColors() throws HeadlessException { 1247 GraphicsEnvironment.checkHeadless(); 1248 1249 // Override to implement custom cursor support. 1250 if (this != Toolkit.getDefaultToolkit()) { 1251 return Toolkit.getDefaultToolkit().getMaximumCursorColors(); 1252 } else { 1253 return 0; 1254 } 1255 } 1256 1257 /** 1258 * Returns whether Toolkit supports this state for 1259 * {@code Frame}s. This method tells whether the <em>UI 1260 * concept</em> of, say, maximization or iconification is 1261 * supported. It will always return false for "compound" states 1262 * like {@code Frame.ICONIFIED|Frame.MAXIMIZED_VERT}. 1263 * In other words, the rule of thumb is that only queries with a 1264 * single frame state constant as an argument are meaningful. 1265 * <p>Note that supporting a given concept is a platform- 1266 * dependent feature. Due to native limitations the Toolkit 1267 * object may report a particular state as supported, however at 1268 * the same time the Toolkit object will be unable to apply the 1269 * state to a given frame. This circumstance has two following 1270 * consequences: 1271 * <ul> 1272 * <li>Only the return value of {@code false} for the present 1273 * method actually indicates that the given state is not 1274 * supported. If the method returns {@code true} the given state 1275 * may still be unsupported and/or unavailable for a particular 1276 * frame. 1277 * <li>The developer should consider examining the value of the 1278 * {@link java.awt.event.WindowEvent#getNewState} method of the 1279 * {@code WindowEvent} received through the {@link 1280 * java.awt.event.WindowStateListener}, rather than assuming 1281 * that the state given to the {@code setExtendedState()} method 1282 * will be definitely applied. For more information see the 1283 * documentation for the {@link Frame#setExtendedState} method. 1284 * </ul> 1285 * 1286 * @param state one of named frame state constants. 1287 * @return {@code true} is this frame state is supported by 1288 * this Toolkit implementation, {@code false} otherwise. 1289 * @exception HeadlessException 1290 * if {@code GraphicsEnvironment.isHeadless()} 1291 * returns {@code true}. 1292 * @see java.awt.Window#addWindowStateListener 1293 * @since 1.4 1294 */ 1295 public boolean isFrameStateSupported(int state) 1296 throws HeadlessException 1297 { 1298 GraphicsEnvironment.checkHeadless(); 1299 1300 if (this != Toolkit.getDefaultToolkit()) { 1301 return Toolkit.getDefaultToolkit(). 1302 isFrameStateSupported(state); 1303 } else { 1304 return (state == Frame.NORMAL); // others are not guaranteed 1305 } 1306 } 1307 1308 /** 1309 * Support for I18N: any visible strings should be stored in 1310 * sun.awt.resources.awt.properties. The ResourceBundle is stored 1311 * here, so that only one copy is maintained. 1312 */ 1313 private static ResourceBundle resources; 1314 private static ResourceBundle platformResources; 1315 1316 // called by platform toolkit 1317 private static void setPlatformResources(ResourceBundle bundle) { 1318 platformResources = bundle; 1319 } 1320 1321 /** 1322 * Initialize JNI field and method ids 1323 */ 1324 private static native void initIDs(); 1325 1326 /** 1327 * WARNING: This is a temporary workaround for a problem in the 1328 * way the AWT loads native libraries. A number of classes in the 1329 * AWT package have a native method, initIDs(), which initializes 1330 * the JNI field and method ids used in the native portion of 1331 * their implementation. 1332 * 1333 * Since the use and storage of these ids is done by the 1334 * implementation libraries, the implementation of these method is 1335 * provided by the particular AWT implementations (for example, 1336 * "Toolkit"s/Peer), such as Motif, Microsoft Windows, or Tiny. The 1337 * problem is that this means that the native libraries must be 1338 * loaded by the java.* classes, which do not necessarily know the 1339 * names of the libraries to load. A better way of doing this 1340 * would be to provide a separate library which defines java.awt.* 1341 * initIDs, and exports the relevant symbols out to the 1342 * implementation libraries. 1343 * 1344 * For now, we know it's done by the implementation, and we assume 1345 * that the name of the library is "awt". -br. 1346 * 1347 * If you change loadLibraries(), please add the change to 1348 * java.awt.image.ColorModel.loadLibraries(). Unfortunately, 1349 * classes can be loaded in java.awt.image that depend on 1350 * libawt and there is no way to call Toolkit.loadLibraries() 1351 * directly. -hung 1352 */ 1353 private static boolean loaded = false; 1354 static void loadLibraries() { 1355 if (!loaded) { 1356 java.security.AccessController.doPrivileged( 1357 new java.security.PrivilegedAction<Void>() { 1358 public Void run() { 1359 System.loadLibrary("awt"); 1360 return null; 1361 } 1362 }); 1363 loaded = true; 1364 } 1365 } 1366 1367 static { 1368 AWTAccessor.setToolkitAccessor( 1369 new AWTAccessor.ToolkitAccessor() { 1370 @Override 1371 public void setPlatformResources(ResourceBundle bundle) { 1372 Toolkit.setPlatformResources(bundle); 1373 } 1374 }); 1375 1376 java.security.AccessController.doPrivileged( 1377 new java.security.PrivilegedAction<Void>() { 1378 public Void run() { 1379 try { 1380 resources = ResourceBundle.getBundle("sun.awt.resources.awt"); 1381 } catch (MissingResourceException e) { 1382 // No resource file; defaults will be used. 1383 } 1384 return null; 1385 } 1386 }); 1387 1388 // ensure that the proper libraries are loaded 1389 loadLibraries(); 1390 initAssistiveTechnologies(); 1391 if (!GraphicsEnvironment.isHeadless()) { 1392 initIDs(); 1393 } 1394 } 1395 1396 /** 1397 * Gets a property with the specified key and default. 1398 * This method returns defaultValue if the property is not found. 1399 * 1400 * @param key the key 1401 * @param defaultValue the default value 1402 * @return the value of the property or the default value 1403 * if the property was not found 1404 */ 1405 public static String getProperty(String key, String defaultValue) { 1406 // first try platform specific bundle 1407 if (platformResources != null) { 1408 try { 1409 return platformResources.getString(key); 1410 } 1411 catch (MissingResourceException e) {} 1412 } 1413 1414 // then shared one 1415 if (resources != null) { 1416 try { 1417 return resources.getString(key); 1418 } 1419 catch (MissingResourceException e) {} 1420 } 1421 1422 return defaultValue; 1423 } 1424 1425 /** 1426 * Get the application's or applet's EventQueue instance. 1427 * Depending on the Toolkit implementation, different EventQueues 1428 * may be returned for different applets. Applets should 1429 * therefore not assume that the EventQueue instance returned 1430 * by this method will be shared by other applets or the system. 1431 * 1432 * <p> If there is a security manager then its 1433 * {@link SecurityManager#checkPermission checkPermission} method 1434 * is called to check {@code AWTPermission("accessEventQueue")}. 1435 * 1436 * @return the {@code EventQueue} object 1437 * @throws SecurityException 1438 * if a security manager is set and it denies access to 1439 * the {@code EventQueue} 1440 * @see java.awt.AWTPermission 1441 */ 1442 public final EventQueue getSystemEventQueue() { 1443 SecurityManager security = System.getSecurityManager(); 1444 if (security != null) { 1445 security.checkPermission(AWTPermissions.CHECK_AWT_EVENTQUEUE_PERMISSION); 1446 } 1447 return getSystemEventQueueImpl(); 1448 } 1449 1450 /** 1451 * Gets the application's or applet's {@code EventQueue} 1452 * instance, without checking access. For security reasons, 1453 * this can only be called from a {@code Toolkit} subclass. 1454 * @return the {@code EventQueue} object 1455 */ 1456 protected abstract EventQueue getSystemEventQueueImpl(); 1457 1458 /* Accessor method for use by AWT package routines. */ 1459 static EventQueue getEventQueue() { 1460 return getDefaultToolkit().getSystemEventQueueImpl(); 1461 } 1462 1463 /** 1464 * Creates a concrete, platform dependent, subclass of the abstract 1465 * DragGestureRecognizer class requested, and associates it with the 1466 * DragSource, Component and DragGestureListener specified. 1467 * 1468 * subclasses should override this to provide their own implementation 1469 * 1470 * @param <T> the type of DragGestureRecognizer to create 1471 * @param abstractRecognizerClass The abstract class of the required recognizer 1472 * @param ds The DragSource 1473 * @param c The Component target for the DragGestureRecognizer 1474 * @param srcActions The actions permitted for the gesture 1475 * @param dgl The DragGestureListener 1476 * 1477 * @return the new object or null. Always returns null if 1478 * GraphicsEnvironment.isHeadless() returns true. 1479 * @see java.awt.GraphicsEnvironment#isHeadless 1480 */ 1481 public <T extends DragGestureRecognizer> T 1482 createDragGestureRecognizer(Class<T> abstractRecognizerClass, 1483 DragSource ds, Component c, int srcActions, 1484 DragGestureListener dgl) 1485 { 1486 return null; 1487 } 1488 1489 /** 1490 * Obtains a value for the specified desktop property. 1491 * 1492 * A desktop property is a uniquely named value for a resource that 1493 * is Toolkit global in nature. Usually it also is an abstract 1494 * representation for an underlying platform dependent desktop setting. 1495 * For more information on desktop properties supported by the AWT see 1496 * <a href="doc-files/DesktopProperties.html">AWT Desktop Properties</a>. 1497 * 1498 * @param propertyName the property name 1499 * @return the value for the specified desktop property 1500 */ 1501 public final synchronized Object getDesktopProperty(String propertyName) { 1502 // This is a workaround for headless toolkits. It would be 1503 // better to override this method but it is declared final. 1504 // "this instanceof" syntax defeats polymorphism. 1505 // --mm, 03/03/00 1506 if (this instanceof HeadlessToolkit) { 1507 return ((HeadlessToolkit)this).getUnderlyingToolkit() 1508 .getDesktopProperty(propertyName); 1509 } 1510 1511 if (desktopProperties.isEmpty()) { 1512 initializeDesktopProperties(); 1513 } 1514 1515 Object value; 1516 1517 // This property should never be cached 1518 if (propertyName.equals("awt.dynamicLayoutSupported")) { 1519 return getDefaultToolkit().lazilyLoadDesktopProperty(propertyName); 1520 } 1521 1522 value = desktopProperties.get(propertyName); 1523 1524 if (value == null) { 1525 value = lazilyLoadDesktopProperty(propertyName); 1526 1527 if (value != null) { 1528 setDesktopProperty(propertyName, value); 1529 } 1530 } 1531 1532 /* for property "awt.font.desktophints" */ 1533 if (value instanceof RenderingHints) { 1534 value = ((RenderingHints)value).clone(); 1535 } 1536 1537 return value; 1538 } 1539 1540 /** 1541 * Sets the named desktop property to the specified value and fires a 1542 * property change event to notify any listeners that the value has changed. 1543 * 1544 * @param name the property name 1545 * @param newValue the new property value 1546 */ 1547 protected final void setDesktopProperty(String name, Object newValue) { 1548 // This is a workaround for headless toolkits. It would be 1549 // better to override this method but it is declared final. 1550 // "this instanceof" syntax defeats polymorphism. 1551 // --mm, 03/03/00 1552 if (this instanceof HeadlessToolkit) { 1553 ((HeadlessToolkit)this).getUnderlyingToolkit() 1554 .setDesktopProperty(name, newValue); 1555 return; 1556 } 1557 Object oldValue; 1558 1559 synchronized (this) { 1560 oldValue = desktopProperties.get(name); 1561 desktopProperties.put(name, newValue); 1562 } 1563 1564 // Don't fire change event if old and new values are null. 1565 // It helps to avoid recursive resending of WM_THEMECHANGED 1566 if (oldValue != null || newValue != null) { 1567 desktopPropsSupport.firePropertyChange(name, oldValue, newValue); 1568 } 1569 } 1570 1571 /** 1572 * An opportunity to lazily evaluate desktop property values. 1573 * @return the desktop property or null 1574 * @param name the name 1575 */ 1576 protected Object lazilyLoadDesktopProperty(String name) { 1577 return null; 1578 } 1579 1580 /** 1581 * initializeDesktopProperties 1582 */ 1583 protected void initializeDesktopProperties() { 1584 } 1585 1586 /** 1587 * Adds the specified property change listener for the named desktop 1588 * property. When a {@link java.beans.PropertyChangeListenerProxy} object is added, 1589 * its property name is ignored, and the wrapped listener is added. 1590 * If {@code name} is {@code null} or {@code pcl} is {@code null}, 1591 * no exception is thrown and no action is performed. 1592 * 1593 * @param name The name of the property to listen for 1594 * @param pcl The property change listener 1595 * @see PropertyChangeSupport#addPropertyChangeListener(String, 1596 PropertyChangeListener) 1597 * @since 1.2 1598 */ 1599 public void addPropertyChangeListener(String name, PropertyChangeListener pcl) { 1600 desktopPropsSupport.addPropertyChangeListener(name, pcl); 1601 } 1602 1603 /** 1604 * Removes the specified property change listener for the named 1605 * desktop property. When a {@link java.beans.PropertyChangeListenerProxy} object 1606 * is removed, its property name is ignored, and 1607 * the wrapped listener is removed. 1608 * If {@code name} is {@code null} or {@code pcl} is {@code null}, 1609 * no exception is thrown and no action is performed. 1610 * 1611 * @param name The name of the property to remove 1612 * @param pcl The property change listener 1613 * @see PropertyChangeSupport#removePropertyChangeListener(String, 1614 PropertyChangeListener) 1615 * @since 1.2 1616 */ 1617 public void removePropertyChangeListener(String name, PropertyChangeListener pcl) { 1618 desktopPropsSupport.removePropertyChangeListener(name, pcl); 1619 } 1620 1621 /** 1622 * Returns an array of all the property change listeners 1623 * registered on this toolkit. The returned array 1624 * contains {@link java.beans.PropertyChangeListenerProxy} objects 1625 * that associate listeners with the names of desktop properties. 1626 * 1627 * @return all of this toolkit's {@link PropertyChangeListener} 1628 * objects wrapped in {@code java.beans.PropertyChangeListenerProxy} objects 1629 * or an empty array if no listeners are added 1630 * 1631 * @see PropertyChangeSupport#getPropertyChangeListeners() 1632 * @since 1.4 1633 */ 1634 public PropertyChangeListener[] getPropertyChangeListeners() { 1635 return desktopPropsSupport.getPropertyChangeListeners(); 1636 } 1637 1638 /** 1639 * Returns an array of all property change listeners 1640 * associated with the specified name of a desktop property. 1641 * 1642 * @param propertyName the named property 1643 * @return all of the {@code PropertyChangeListener} objects 1644 * associated with the specified name of a desktop property 1645 * or an empty array if no such listeners are added 1646 * 1647 * @see PropertyChangeSupport#getPropertyChangeListeners(String) 1648 * @since 1.4 1649 */ 1650 public PropertyChangeListener[] getPropertyChangeListeners(String propertyName) { 1651 return desktopPropsSupport.getPropertyChangeListeners(propertyName); 1652 } 1653 1654 /** 1655 * The desktop properties. 1656 */ 1657 protected final Map<String,Object> desktopProperties = 1658 new HashMap<String,Object>(); 1659 /** 1660 * The desktop properties change support. 1661 */ 1662 protected final PropertyChangeSupport desktopPropsSupport = 1663 Toolkit.createPropertyChangeSupport(this); 1664 1665 /** 1666 * Returns whether the always-on-top mode is supported by this toolkit. 1667 * To detect whether the always-on-top mode is supported for a 1668 * particular Window, use {@link Window#isAlwaysOnTopSupported}. 1669 * @return {@code true}, if current toolkit supports the always-on-top mode, 1670 * otherwise returns {@code false} 1671 * @see Window#isAlwaysOnTopSupported 1672 * @see Window#setAlwaysOnTop(boolean) 1673 * @since 1.6 1674 */ 1675 public boolean isAlwaysOnTopSupported() { 1676 return true; 1677 } 1678 1679 /** 1680 * Returns whether the given modality type is supported by this toolkit. If 1681 * a dialog with unsupported modality type is created, then 1682 * {@code Dialog.ModalityType.MODELESS} is used instead. 1683 * 1684 * @param modalityType modality type to be checked for support by this toolkit 1685 * 1686 * @return {@code true}, if current toolkit supports given modality 1687 * type, {@code false} otherwise 1688 * 1689 * @see java.awt.Dialog.ModalityType 1690 * @see java.awt.Dialog#getModalityType 1691 * @see java.awt.Dialog#setModalityType 1692 * 1693 * @since 1.6 1694 */ 1695 public abstract boolean isModalityTypeSupported(Dialog.ModalityType modalityType); 1696 1697 /** 1698 * Returns whether the given modal exclusion type is supported by this 1699 * toolkit. If an unsupported modal exclusion type property is set on a window, 1700 * then {@code Dialog.ModalExclusionType.NO_EXCLUDE} is used instead. 1701 * 1702 * @param modalExclusionType modal exclusion type to be checked for support by this toolkit 1703 * 1704 * @return {@code true}, if current toolkit supports given modal exclusion 1705 * type, {@code false} otherwise 1706 * 1707 * @see java.awt.Dialog.ModalExclusionType 1708 * @see java.awt.Window#getModalExclusionType 1709 * @see java.awt.Window#setModalExclusionType 1710 * 1711 * @since 1.6 1712 */ 1713 public abstract boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType modalExclusionType); 1714 1715 // 8014718: logging has been removed from SunToolkit 1716 1717 private static final int LONG_BITS = 64; 1718 private int[] calls = new int[LONG_BITS]; 1719 private static volatile long enabledOnToolkitMask; 1720 private AWTEventListener eventListener = null; 1721 private WeakHashMap<AWTEventListener, SelectiveAWTEventListener> listener2SelectiveListener = new WeakHashMap<>(); 1722 1723 /* 1724 * Extracts a "pure" AWTEventListener from a AWTEventListenerProxy, 1725 * if the listener is proxied. 1726 */ 1727 private static AWTEventListener deProxyAWTEventListener(AWTEventListener l) 1728 { 1729 AWTEventListener localL = l; 1730 1731 if (localL == null) { 1732 return null; 1733 } 1734 // if user passed in a AWTEventListenerProxy object, extract 1735 // the listener 1736 if (l instanceof AWTEventListenerProxy) { 1737 localL = ((AWTEventListenerProxy)l).getListener(); 1738 } 1739 return localL; 1740 } 1741 1742 /** 1743 * Adds an AWTEventListener to receive all AWTEvents dispatched 1744 * system-wide that conform to the given {@code eventMask}. 1745 * <p> 1746 * First, if there is a security manager, its {@code checkPermission} 1747 * method is called with an 1748 * {@code AWTPermission("listenToAllAWTEvents")} permission. 1749 * This may result in a SecurityException. 1750 * <p> 1751 * {@code eventMask} is a bitmask of event types to receive. 1752 * It is constructed by bitwise OR-ing together the event masks 1753 * defined in {@code AWTEvent}. 1754 * <p> 1755 * Note: event listener use is not recommended for normal 1756 * application use, but are intended solely to support special 1757 * purpose facilities including support for accessibility, 1758 * event record/playback, and diagnostic tracing. 1759 * 1760 * If listener is null, no exception is thrown and no action is performed. 1761 * 1762 * @param listener the event listener. 1763 * @param eventMask the bitmask of event types to receive 1764 * @throws SecurityException 1765 * if a security manager exists and its 1766 * {@code checkPermission} method doesn't allow the operation. 1767 * @see #removeAWTEventListener 1768 * @see #getAWTEventListeners 1769 * @see SecurityManager#checkPermission 1770 * @see java.awt.AWTEvent 1771 * @see java.awt.AWTPermission 1772 * @see java.awt.event.AWTEventListener 1773 * @see java.awt.event.AWTEventListenerProxy 1774 * @since 1.2 1775 */ 1776 public void addAWTEventListener(AWTEventListener listener, long eventMask) { 1777 AWTEventListener localL = deProxyAWTEventListener(listener); 1778 1779 if (localL == null) { 1780 return; 1781 } 1782 SecurityManager security = System.getSecurityManager(); 1783 if (security != null) { 1784 security.checkPermission(AWTPermissions.ALL_AWT_EVENTS_PERMISSION); 1785 } 1786 synchronized (this) { 1787 SelectiveAWTEventListener selectiveListener = 1788 listener2SelectiveListener.get(localL); 1789 1790 if (selectiveListener == null) { 1791 // Create a new selectiveListener. 1792 selectiveListener = new SelectiveAWTEventListener(localL, 1793 eventMask); 1794 listener2SelectiveListener.put(localL, selectiveListener); 1795 eventListener = ToolkitEventMulticaster.add(eventListener, 1796 selectiveListener); 1797 } 1798 // OR the eventMask into the selectiveListener's event mask. 1799 selectiveListener.orEventMasks(eventMask); 1800 1801 enabledOnToolkitMask |= eventMask; 1802 1803 long mask = eventMask; 1804 for (int i=0; i<LONG_BITS; i++) { 1805 // If no bits are set, break out of loop. 1806 if (mask == 0) { 1807 break; 1808 } 1809 if ((mask & 1L) != 0) { // Always test bit 0. 1810 calls[i]++; 1811 } 1812 mask >>>= 1; // Right shift, fill with zeros on left. 1813 } 1814 } 1815 } 1816 1817 /** 1818 * Removes an AWTEventListener from receiving dispatched AWTEvents. 1819 * <p> 1820 * First, if there is a security manager, its {@code checkPermission} 1821 * method is called with an 1822 * {@code AWTPermission("listenToAllAWTEvents")} permission. 1823 * This may result in a SecurityException. 1824 * <p> 1825 * Note: event listener use is not recommended for normal 1826 * application use, but are intended solely to support special 1827 * purpose facilities including support for accessibility, 1828 * event record/playback, and diagnostic tracing. 1829 * 1830 * If listener is null, no exception is thrown and no action is performed. 1831 * 1832 * @param listener the event listener. 1833 * @throws SecurityException 1834 * if a security manager exists and its 1835 * {@code checkPermission} method doesn't allow the operation. 1836 * @see #addAWTEventListener 1837 * @see #getAWTEventListeners 1838 * @see SecurityManager#checkPermission 1839 * @see java.awt.AWTEvent 1840 * @see java.awt.AWTPermission 1841 * @see java.awt.event.AWTEventListener 1842 * @see java.awt.event.AWTEventListenerProxy 1843 * @since 1.2 1844 */ 1845 public void removeAWTEventListener(AWTEventListener listener) { 1846 AWTEventListener localL = deProxyAWTEventListener(listener); 1847 1848 if (listener == null) { 1849 return; 1850 } 1851 SecurityManager security = System.getSecurityManager(); 1852 if (security != null) { 1853 security.checkPermission(AWTPermissions.ALL_AWT_EVENTS_PERMISSION); 1854 } 1855 1856 synchronized (this) { 1857 SelectiveAWTEventListener selectiveListener = 1858 listener2SelectiveListener.get(localL); 1859 1860 if (selectiveListener != null) { 1861 listener2SelectiveListener.remove(localL); 1862 int[] listenerCalls = selectiveListener.getCalls(); 1863 for (int i=0; i<LONG_BITS; i++) { 1864 calls[i] -= listenerCalls[i]; 1865 assert calls[i] >= 0: "Negative Listeners count"; 1866 1867 if (calls[i] == 0) { 1868 enabledOnToolkitMask &= ~(1L<<i); 1869 } 1870 } 1871 } 1872 eventListener = ToolkitEventMulticaster.remove(eventListener, 1873 (selectiveListener == null) ? localL : selectiveListener); 1874 } 1875 } 1876 1877 static boolean enabledOnToolkit(long eventMask) { 1878 return (enabledOnToolkitMask & eventMask) != 0; 1879 } 1880 1881 synchronized int countAWTEventListeners(long eventMask) { 1882 int ci = 0; 1883 for (; eventMask != 0; eventMask >>>= 1, ci++) { 1884 } 1885 ci--; 1886 return calls[ci]; 1887 } 1888 /** 1889 * Returns an array of all the {@code AWTEventListener}s 1890 * registered on this toolkit. 1891 * If there is a security manager, its {@code checkPermission} 1892 * method is called with an 1893 * {@code AWTPermission("listenToAllAWTEvents")} permission. 1894 * This may result in a SecurityException. 1895 * Listeners can be returned 1896 * within {@code AWTEventListenerProxy} objects, which also contain 1897 * the event mask for the given listener. 1898 * Note that listener objects 1899 * added multiple times appear only once in the returned array. 1900 * 1901 * @return all of the {@code AWTEventListener}s or an empty 1902 * array if no listeners are currently registered 1903 * @throws SecurityException 1904 * if a security manager exists and its 1905 * {@code checkPermission} method doesn't allow the operation. 1906 * @see #addAWTEventListener 1907 * @see #removeAWTEventListener 1908 * @see SecurityManager#checkPermission 1909 * @see java.awt.AWTEvent 1910 * @see java.awt.AWTPermission 1911 * @see java.awt.event.AWTEventListener 1912 * @see java.awt.event.AWTEventListenerProxy 1913 * @since 1.4 1914 */ 1915 public AWTEventListener[] getAWTEventListeners() { 1916 SecurityManager security = System.getSecurityManager(); 1917 if (security != null) { 1918 security.checkPermission(AWTPermissions.ALL_AWT_EVENTS_PERMISSION); 1919 } 1920 synchronized (this) { 1921 EventListener[] la = ToolkitEventMulticaster.getListeners(eventListener,AWTEventListener.class); 1922 1923 AWTEventListener[] ret = new AWTEventListener[la.length]; 1924 for (int i = 0; i < la.length; i++) { 1925 SelectiveAWTEventListener sael = (SelectiveAWTEventListener)la[i]; 1926 AWTEventListener tempL = sael.getListener(); 1927 //assert tempL is not an AWTEventListenerProxy - we should 1928 // have weeded them all out 1929 // don't want to wrap a proxy inside a proxy 1930 ret[i] = new AWTEventListenerProxy(sael.getEventMask(), tempL); 1931 } 1932 return ret; 1933 } 1934 } 1935 1936 /** 1937 * Returns an array of all the {@code AWTEventListener}s 1938 * registered on this toolkit which listen to all of the event 1939 * types specified in the {@code eventMask} argument. 1940 * If there is a security manager, its {@code checkPermission} 1941 * method is called with an 1942 * {@code AWTPermission("listenToAllAWTEvents")} permission. 1943 * This may result in a SecurityException. 1944 * Listeners can be returned 1945 * within {@code AWTEventListenerProxy} objects, which also contain 1946 * the event mask for the given listener. 1947 * Note that listener objects 1948 * added multiple times appear only once in the returned array. 1949 * 1950 * @param eventMask the bitmask of event types to listen for 1951 * @return all of the {@code AWTEventListener}s registered 1952 * on this toolkit for the specified 1953 * event types, or an empty array if no such listeners 1954 * are currently registered 1955 * @throws SecurityException 1956 * if a security manager exists and its 1957 * {@code checkPermission} method doesn't allow the operation. 1958 * @see #addAWTEventListener 1959 * @see #removeAWTEventListener 1960 * @see SecurityManager#checkPermission 1961 * @see java.awt.AWTEvent 1962 * @see java.awt.AWTPermission 1963 * @see java.awt.event.AWTEventListener 1964 * @see java.awt.event.AWTEventListenerProxy 1965 * @since 1.4 1966 */ 1967 public AWTEventListener[] getAWTEventListeners(long eventMask) { 1968 SecurityManager security = System.getSecurityManager(); 1969 if (security != null) { 1970 security.checkPermission(AWTPermissions.ALL_AWT_EVENTS_PERMISSION); 1971 } 1972 synchronized (this) { 1973 EventListener[] la = ToolkitEventMulticaster.getListeners(eventListener,AWTEventListener.class); 1974 1975 java.util.List<AWTEventListenerProxy> list = new ArrayList<>(la.length); 1976 1977 for (int i = 0; i < la.length; i++) { 1978 SelectiveAWTEventListener sael = (SelectiveAWTEventListener)la[i]; 1979 if ((sael.getEventMask() & eventMask) == eventMask) { 1980 //AWTEventListener tempL = sael.getListener(); 1981 list.add(new AWTEventListenerProxy(sael.getEventMask(), 1982 sael.getListener())); 1983 } 1984 } 1985 return list.toArray(new AWTEventListener[0]); 1986 } 1987 } 1988 1989 /* 1990 * This method notifies any AWTEventListeners that an event 1991 * is about to be dispatched. 1992 * 1993 * @param theEvent the event which will be dispatched. 1994 */ 1995 void notifyAWTEventListeners(AWTEvent theEvent) { 1996 // This is a workaround for headless toolkits. It would be 1997 // better to override this method but it is declared package private. 1998 // "this instanceof" syntax defeats polymorphism. 1999 // --mm, 03/03/00 2000 if (this instanceof HeadlessToolkit) { 2001 ((HeadlessToolkit)this).getUnderlyingToolkit() 2002 .notifyAWTEventListeners(theEvent); 2003 return; 2004 } 2005 2006 AWTEventListener eventListener = this.eventListener; 2007 if (eventListener != null) { 2008 eventListener.eventDispatched(theEvent); 2009 } 2010 } 2011 2012 private static class ToolkitEventMulticaster extends AWTEventMulticaster 2013 implements AWTEventListener { 2014 // Implementation cloned from AWTEventMulticaster. 2015 2016 ToolkitEventMulticaster(AWTEventListener a, AWTEventListener b) { 2017 super(a, b); 2018 } 2019 2020 @SuppressWarnings("overloads") 2021 static AWTEventListener add(AWTEventListener a, 2022 AWTEventListener b) { 2023 if (a == null) return b; 2024 if (b == null) return a; 2025 return new ToolkitEventMulticaster(a, b); 2026 } 2027 2028 @SuppressWarnings("overloads") 2029 static AWTEventListener remove(AWTEventListener l, 2030 AWTEventListener oldl) { 2031 return (AWTEventListener) removeInternal(l, oldl); 2032 } 2033 2034 // #4178589: must overload remove(EventListener) to call our add() 2035 // instead of the static addInternal() so we allocate a 2036 // ToolkitEventMulticaster instead of an AWTEventMulticaster. 2037 // Note: this method is called by AWTEventListener.removeInternal(), 2038 // so its method signature must match AWTEventListener.remove(). 2039 protected EventListener remove(EventListener oldl) { 2040 if (oldl == a) return b; 2041 if (oldl == b) return a; 2042 AWTEventListener a2 = (AWTEventListener)removeInternal(a, oldl); 2043 AWTEventListener b2 = (AWTEventListener)removeInternal(b, oldl); 2044 if (a2 == a && b2 == b) { 2045 return this; // it's not here 2046 } 2047 return add(a2, b2); 2048 } 2049 2050 public void eventDispatched(AWTEvent event) { 2051 ((AWTEventListener)a).eventDispatched(event); 2052 ((AWTEventListener)b).eventDispatched(event); 2053 } 2054 } 2055 2056 private class SelectiveAWTEventListener implements AWTEventListener { 2057 AWTEventListener listener; 2058 private long eventMask; 2059 // This array contains the number of times to call the eventlistener 2060 // for each event type. 2061 int[] calls = new int[Toolkit.LONG_BITS]; 2062 2063 public AWTEventListener getListener() {return listener;} 2064 public long getEventMask() {return eventMask;} 2065 public int[] getCalls() {return calls;} 2066 2067 public void orEventMasks(long mask) { 2068 eventMask |= mask; 2069 // For each event bit set in mask, increment its call count. 2070 for (int i=0; i<Toolkit.LONG_BITS; i++) { 2071 // If no bits are set, break out of loop. 2072 if (mask == 0) { 2073 break; 2074 } 2075 if ((mask & 1L) != 0) { // Always test bit 0. 2076 calls[i]++; 2077 } 2078 mask >>>= 1; // Right shift, fill with zeros on left. 2079 } 2080 } 2081 2082 SelectiveAWTEventListener(AWTEventListener l, long mask) { 2083 listener = l; 2084 eventMask = mask; 2085 } 2086 2087 public void eventDispatched(AWTEvent event) { 2088 long eventBit = 0; // Used to save the bit of the event type. 2089 if (((eventBit = eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0 && 2090 event.id >= ComponentEvent.COMPONENT_FIRST && 2091 event.id <= ComponentEvent.COMPONENT_LAST) 2092 || ((eventBit = eventMask & AWTEvent.CONTAINER_EVENT_MASK) != 0 && 2093 event.id >= ContainerEvent.CONTAINER_FIRST && 2094 event.id <= ContainerEvent.CONTAINER_LAST) 2095 || ((eventBit = eventMask & AWTEvent.FOCUS_EVENT_MASK) != 0 && 2096 event.id >= FocusEvent.FOCUS_FIRST && 2097 event.id <= FocusEvent.FOCUS_LAST) 2098 || ((eventBit = eventMask & AWTEvent.KEY_EVENT_MASK) != 0 && 2099 event.id >= KeyEvent.KEY_FIRST && 2100 event.id <= KeyEvent.KEY_LAST) 2101 || ((eventBit = eventMask & AWTEvent.MOUSE_WHEEL_EVENT_MASK) != 0 && 2102 event.id == MouseEvent.MOUSE_WHEEL) 2103 || ((eventBit = eventMask & AWTEvent.MOUSE_MOTION_EVENT_MASK) != 0 && 2104 (event.id == MouseEvent.MOUSE_MOVED || 2105 event.id == MouseEvent.MOUSE_DRAGGED)) 2106 || ((eventBit = eventMask & AWTEvent.MOUSE_EVENT_MASK) != 0 && 2107 event.id != MouseEvent.MOUSE_MOVED && 2108 event.id != MouseEvent.MOUSE_DRAGGED && 2109 event.id != MouseEvent.MOUSE_WHEEL && 2110 event.id >= MouseEvent.MOUSE_FIRST && 2111 event.id <= MouseEvent.MOUSE_LAST) 2112 || ((eventBit = eventMask & AWTEvent.WINDOW_EVENT_MASK) != 0 && 2113 (event.id >= WindowEvent.WINDOW_FIRST && 2114 event.id <= WindowEvent.WINDOW_LAST)) 2115 || ((eventBit = eventMask & AWTEvent.ACTION_EVENT_MASK) != 0 && 2116 event.id >= ActionEvent.ACTION_FIRST && 2117 event.id <= ActionEvent.ACTION_LAST) 2118 || ((eventBit = eventMask & AWTEvent.ADJUSTMENT_EVENT_MASK) != 0 && 2119 event.id >= AdjustmentEvent.ADJUSTMENT_FIRST && 2120 event.id <= AdjustmentEvent.ADJUSTMENT_LAST) 2121 || ((eventBit = eventMask & AWTEvent.ITEM_EVENT_MASK) != 0 && 2122 event.id >= ItemEvent.ITEM_FIRST && 2123 event.id <= ItemEvent.ITEM_LAST) 2124 || ((eventBit = eventMask & AWTEvent.TEXT_EVENT_MASK) != 0 && 2125 event.id >= TextEvent.TEXT_FIRST && 2126 event.id <= TextEvent.TEXT_LAST) 2127 || ((eventBit = eventMask & AWTEvent.INPUT_METHOD_EVENT_MASK) != 0 && 2128 event.id >= InputMethodEvent.INPUT_METHOD_FIRST && 2129 event.id <= InputMethodEvent.INPUT_METHOD_LAST) 2130 || ((eventBit = eventMask & AWTEvent.PAINT_EVENT_MASK) != 0 && 2131 event.id >= PaintEvent.PAINT_FIRST && 2132 event.id <= PaintEvent.PAINT_LAST) 2133 || ((eventBit = eventMask & AWTEvent.INVOCATION_EVENT_MASK) != 0 && 2134 event.id >= InvocationEvent.INVOCATION_FIRST && 2135 event.id <= InvocationEvent.INVOCATION_LAST) 2136 || ((eventBit = eventMask & AWTEvent.HIERARCHY_EVENT_MASK) != 0 && 2137 event.id == HierarchyEvent.HIERARCHY_CHANGED) 2138 || ((eventBit = eventMask & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) != 0 && 2139 (event.id == HierarchyEvent.ANCESTOR_MOVED || 2140 event.id == HierarchyEvent.ANCESTOR_RESIZED)) 2141 || ((eventBit = eventMask & AWTEvent.WINDOW_STATE_EVENT_MASK) != 0 && 2142 event.id == WindowEvent.WINDOW_STATE_CHANGED) 2143 || ((eventBit = eventMask & AWTEvent.WINDOW_FOCUS_EVENT_MASK) != 0 && 2144 (event.id == WindowEvent.WINDOW_GAINED_FOCUS || 2145 event.id == WindowEvent.WINDOW_LOST_FOCUS)) 2146 || ((eventBit = eventMask & sun.awt.SunToolkit.GRAB_EVENT_MASK) != 0 && 2147 (event instanceof sun.awt.UngrabEvent))) { 2148 // Get the index of the call count for this event type. 2149 // Instead of using Math.log(...) we will calculate it with 2150 // bit shifts. That's what previous implementation looked like: 2151 // 2152 // int ci = (int) (Math.log(eventBit)/Math.log(2)); 2153 int ci = 0; 2154 for (long eMask = eventBit; eMask != 0; eMask >>>= 1, ci++) { 2155 } 2156 ci--; 2157 // Call the listener as many times as it was added for this 2158 // event type. 2159 for (int i=0; i<calls[ci]; i++) { 2160 listener.eventDispatched(event); 2161 } 2162 } 2163 } 2164 } 2165 2166 /** 2167 * Returns a map of visual attributes for the abstract level description 2168 * of the given input method highlight, or null if no mapping is found. 2169 * The style field of the input method highlight is ignored. The map 2170 * returned is unmodifiable. 2171 * @param highlight input method highlight 2172 * @return style attribute map, or {@code null} 2173 * @exception HeadlessException if 2174 * {@code GraphicsEnvironment.isHeadless} returns true 2175 * @see java.awt.GraphicsEnvironment#isHeadless 2176 * @since 1.3 2177 */ 2178 public abstract Map<java.awt.font.TextAttribute,?> 2179 mapInputMethodHighlight(InputMethodHighlight highlight) 2180 throws HeadlessException; 2181 2182 private static PropertyChangeSupport createPropertyChangeSupport(Toolkit toolkit) { 2183 if (toolkit instanceof SunToolkit || toolkit instanceof HeadlessToolkit) { 2184 return new DesktopPropertyChangeSupport(toolkit); 2185 } else { 2186 return new PropertyChangeSupport(toolkit); 2187 } 2188 } 2189 2190 @SuppressWarnings("serial") 2191 private static class DesktopPropertyChangeSupport extends PropertyChangeSupport { 2192 2193 private static final StringBuilder PROP_CHANGE_SUPPORT_KEY = 2194 new StringBuilder("desktop property change support key"); 2195 private final Object source; 2196 2197 public DesktopPropertyChangeSupport(Object sourceBean) { 2198 super(sourceBean); 2199 source = sourceBean; 2200 } 2201 2202 @Override 2203 public synchronized void addPropertyChangeListener( 2204 String propertyName, 2205 PropertyChangeListener listener) 2206 { 2207 PropertyChangeSupport pcs = (PropertyChangeSupport) 2208 AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY); 2209 if (null == pcs) { 2210 pcs = new PropertyChangeSupport(source); 2211 AppContext.getAppContext().put(PROP_CHANGE_SUPPORT_KEY, pcs); 2212 } 2213 pcs.addPropertyChangeListener(propertyName, listener); 2214 } 2215 2216 @Override 2217 public synchronized void removePropertyChangeListener( 2218 String propertyName, 2219 PropertyChangeListener listener) 2220 { 2221 PropertyChangeSupport pcs = (PropertyChangeSupport) 2222 AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY); 2223 if (null != pcs) { 2224 pcs.removePropertyChangeListener(propertyName, listener); 2225 } 2226 } 2227 2228 @Override 2229 public synchronized PropertyChangeListener[] getPropertyChangeListeners() 2230 { 2231 PropertyChangeSupport pcs = (PropertyChangeSupport) 2232 AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY); 2233 if (null != pcs) { 2234 return pcs.getPropertyChangeListeners(); 2235 } else { 2236 return new PropertyChangeListener[0]; 2237 } 2238 } 2239 2240 @Override 2241 public synchronized PropertyChangeListener[] getPropertyChangeListeners(String propertyName) 2242 { 2243 PropertyChangeSupport pcs = (PropertyChangeSupport) 2244 AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY); 2245 if (null != pcs) { 2246 return pcs.getPropertyChangeListeners(propertyName); 2247 } else { 2248 return new PropertyChangeListener[0]; 2249 } 2250 } 2251 2252 @Override 2253 public synchronized void addPropertyChangeListener(PropertyChangeListener listener) { 2254 PropertyChangeSupport pcs = (PropertyChangeSupport) 2255 AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY); 2256 if (null == pcs) { 2257 pcs = new PropertyChangeSupport(source); 2258 AppContext.getAppContext().put(PROP_CHANGE_SUPPORT_KEY, pcs); 2259 } 2260 pcs.addPropertyChangeListener(listener); 2261 } 2262 2263 @Override 2264 public synchronized void removePropertyChangeListener(PropertyChangeListener listener) { 2265 PropertyChangeSupport pcs = (PropertyChangeSupport) 2266 AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY); 2267 if (null != pcs) { 2268 pcs.removePropertyChangeListener(listener); 2269 } 2270 } 2271 2272 /* 2273 * we do expect that all other fireXXX() methods of java.beans.PropertyChangeSupport 2274 * use this method. If this will be changed we will need to change this class. 2275 */ 2276 @Override 2277 public void firePropertyChange(final PropertyChangeEvent evt) { 2278 Object oldValue = evt.getOldValue(); 2279 Object newValue = evt.getNewValue(); 2280 String propertyName = evt.getPropertyName(); 2281 if (oldValue != null && newValue != null && oldValue.equals(newValue)) { 2282 return; 2283 } 2284 Runnable updater = new Runnable() { 2285 public void run() { 2286 PropertyChangeSupport pcs = (PropertyChangeSupport) 2287 AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY); 2288 if (null != pcs) { 2289 pcs.firePropertyChange(evt); 2290 } 2291 } 2292 }; 2293 final AppContext currentAppContext = AppContext.getAppContext(); 2294 for (AppContext appContext : AppContext.getAppContexts()) { 2295 if (null == appContext || appContext.isDisposed()) { 2296 continue; 2297 } 2298 if (currentAppContext == appContext) { 2299 updater.run(); 2300 } else { 2301 final PeerEvent e = new PeerEvent(source, updater, PeerEvent.ULTIMATE_PRIORITY_EVENT); 2302 SunToolkit.postEvent(appContext, e); 2303 } 2304 } 2305 } 2306 } 2307 2308 /** 2309 * Reports whether events from extra mouse buttons are allowed to be processed and posted into 2310 * {@code EventQueue}. 2311 * <br> 2312 * To change the returned value it is necessary to set the {@code sun.awt.enableExtraMouseButtons} 2313 * property before the {@code Toolkit} class initialization. This setting could be done on the application 2314 * startup by the following command: 2315 * <pre> 2316 * java -Dsun.awt.enableExtraMouseButtons=false Application 2317 * </pre> 2318 * Alternatively, the property could be set in the application by using the following code: 2319 * <pre> 2320 * System.setProperty("sun.awt.enableExtraMouseButtons", "true"); 2321 * </pre> 2322 * before the {@code Toolkit} class initialization. 2323 * If not set by the time of the {@code Toolkit} class initialization, this property will be 2324 * initialized with {@code true}. 2325 * Changing this value after the {@code Toolkit} class initialization will have no effect. 2326 * 2327 * @exception HeadlessException if GraphicsEnvironment.isHeadless() returns true 2328 * @return {@code true} if events from extra mouse buttons are allowed to be processed and posted; 2329 * {@code false} otherwise 2330 * @see System#getProperty(String propertyName) 2331 * @see System#setProperty(String propertyName, String value) 2332 * @see java.awt.EventQueue 2333 * @since 1.7 2334 */ 2335 public boolean areExtraMouseButtonsEnabled() throws HeadlessException { 2336 GraphicsEnvironment.checkHeadless(); 2337 2338 return Toolkit.getDefaultToolkit().areExtraMouseButtonsEnabled(); 2339 } 2340 }