1 /* 2 * Copyright (c) 2002, 2013, 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 sun.swing; 27 28 import java.security.*; 29 import java.lang.reflect.*; 30 import java.awt.*; 31 import static java.awt.RenderingHints.*; 32 import java.awt.event.*; 33 import java.awt.font.*; 34 import java.awt.geom.*; 35 import java.awt.print.PrinterGraphics; 36 import java.text.CharacterIterator; 37 import java.text.AttributedCharacterIterator; 38 import java.text.AttributedString; 39 40 import javax.swing.*; 41 import javax.swing.event.TreeModelEvent; 42 import javax.swing.text.Highlighter; 43 import javax.swing.text.JTextComponent; 44 import javax.swing.text.DefaultHighlighter; 45 import javax.swing.text.DefaultCaret; 46 import javax.swing.table.TableCellRenderer; 47 import javax.swing.table.TableColumnModel; 48 import javax.swing.tree.TreeModel; 49 import javax.swing.tree.TreePath; 50 51 import sun.swing.PrintColorUIResource; 52 import sun.swing.ImageIconUIResource; 53 import sun.print.ProxyPrintGraphics; 54 import sun.awt.*; 55 import sun.security.action.GetPropertyAction; 56 import java.io.*; 57 import java.util.*; 58 import sun.font.FontDesignMetrics; 59 import sun.font.FontUtilities; 60 import sun.java2d.SunGraphicsEnvironment; 61 62 import java.util.concurrent.Callable; 63 import java.util.concurrent.Future; 64 import java.util.concurrent.FutureTask; 65 66 /** 67 * A collection of utility methods for Swing. 68 * <p> 69 * <b>WARNING:</b> While this class is public, it should not be treated as 70 * public API and its API may change in incompatable ways between dot dot 71 * releases and even patch releases. You should not rely on this class even 72 * existing. 73 * 74 */ 75 public class SwingUtilities2 { 76 /** 77 * The <code>AppContext</code> key for our one <code>LAFState</code> 78 * instance. 79 */ 80 public static final Object LAF_STATE_KEY = 81 new StringBuffer("LookAndFeel State"); 82 83 // Maintain a cache of CACHE_SIZE fonts and the left side bearing 84 // of the characters falling into the range MIN_CHAR_INDEX to 85 // MAX_CHAR_INDEX. The values in fontCache are created as needed. 86 private static LSBCacheEntry[] fontCache; 87 // Windows defines 6 font desktop properties, we will therefore only 88 // cache the metrics for 6 fonts. 89 private static final int CACHE_SIZE = 6; 90 // nextIndex in fontCache to insert a font into. 91 private static int nextIndex; 92 // LSBCacheEntry used to search in fontCache to see if we already 93 // have an entry for a particular font 94 private static LSBCacheEntry searchKey; 95 96 // getLeftSideBearing will consult all characters that fall in the 97 // range MIN_CHAR_INDEX to MAX_CHAR_INDEX. 98 private static final int MIN_CHAR_INDEX = (int)'W'; 99 private static final int MAX_CHAR_INDEX = (int)'W' + 1; 100 101 public static final FontRenderContext DEFAULT_FRC = 102 new FontRenderContext(null, false, false); 103 104 /** 105 * A JComponent client property is used to determine text aa settings. 106 * To avoid having this property persist between look and feels changes 107 * the value of the property is set to null in JComponent.setUI 108 */ 109 public static final Object AA_TEXT_PROPERTY_KEY = 110 new StringBuffer("AATextInfoPropertyKey"); 111 112 /** 113 * Attribute key for the content elements. If it is set on an element, the 114 * element is considered to be a line break. 115 */ 116 public static final String IMPLIED_CR = "CR"; 117 118 /** 119 * Used to tell a text component, being used as an editor for table 120 * or tree, how many clicks it took to start editing. 121 */ 122 private static final StringBuilder SKIP_CLICK_COUNT = 123 new StringBuilder("skipClickCount"); 124 125 /* Presently this class assumes default fractional metrics. 126 * This may need to change to emulate future platform L&Fs. 127 */ 128 public static class AATextInfo { 129 130 private static AATextInfo getAATextInfoFromMap(Map hints) { 131 132 Object aaHint = hints.get(KEY_TEXT_ANTIALIASING); 133 Object contHint = hints.get(KEY_TEXT_LCD_CONTRAST); 134 135 if (aaHint == null || 136 aaHint == VALUE_TEXT_ANTIALIAS_OFF || 137 aaHint == VALUE_TEXT_ANTIALIAS_DEFAULT) { 138 return null; 139 } else { 140 return new AATextInfo(aaHint, (Integer)contHint); 141 } 142 } 143 144 public static AATextInfo getAATextInfo(boolean lafCondition) { 145 SunToolkit.setAAFontSettingsCondition(lafCondition); 146 Toolkit tk = Toolkit.getDefaultToolkit(); 147 Object map = tk.getDesktopProperty(SunToolkit.DESKTOPFONTHINTS); 148 if (map instanceof Map) { 149 return getAATextInfoFromMap((Map)map); 150 } else { 151 return null; 152 } 153 } 154 155 Object aaHint; 156 Integer lcdContrastHint; 157 FontRenderContext frc; 158 159 /* These are rarely constructed objects, and only when a complete 160 * UI is being updated, so the cost of the tests here is minimal 161 * and saves tests elsewhere. 162 * We test that the values are ones we support/expect. 163 */ 164 public AATextInfo(Object aaHint, Integer lcdContrastHint) { 165 if (aaHint == null) { 166 throw new InternalError("null not allowed here"); 167 } 168 if (aaHint == VALUE_TEXT_ANTIALIAS_OFF || 169 aaHint == VALUE_TEXT_ANTIALIAS_DEFAULT) { 170 throw new InternalError("AA must be on"); 171 } 172 this.aaHint = aaHint; 173 this.lcdContrastHint = lcdContrastHint; 174 this.frc = new FontRenderContext(null, aaHint, 175 VALUE_FRACTIONALMETRICS_DEFAULT); 176 } 177 } 178 179 /** 180 * Key used in client properties used to indicate that the 181 * <code>ComponentUI</code> of the JComponent instance should be returned. 182 */ 183 public static final Object COMPONENT_UI_PROPERTY_KEY = 184 new StringBuffer("ComponentUIPropertyKey"); 185 186 /** Client Property key for the text maximal offsets for BasicMenuItemUI */ 187 public static final StringUIClientPropertyKey BASICMENUITEMUI_MAX_TEXT_OFFSET = 188 new StringUIClientPropertyKey ("maxTextOffset"); 189 190 // security stuff 191 private static Field inputEvent_CanAccessSystemClipboard_Field = null; 192 private static final String UntrustedClipboardAccess = 193 "UNTRUSTED_CLIPBOARD_ACCESS_KEY"; 194 195 //all access to charsBuffer is to be synchronized on charsBufferLock 196 private static final int CHAR_BUFFER_SIZE = 100; 197 private static final Object charsBufferLock = new Object(); 198 private static char[] charsBuffer = new char[CHAR_BUFFER_SIZE]; 199 200 static { 201 fontCache = new LSBCacheEntry[CACHE_SIZE]; 202 } 203 204 /** 205 * Fill the character buffer cache. Return the buffer length. 206 */ 207 private static int syncCharsBuffer(String s) { 208 int length = s.length(); 209 if ((charsBuffer == null) || (charsBuffer.length < length)) { 210 charsBuffer = s.toCharArray(); 211 } else { 212 s.getChars(0, length, charsBuffer, 0); 213 } 214 return length; 215 } 216 217 /** 218 * checks whether TextLayout is required to handle characters. 219 * 220 * @param text characters to be tested 221 * @param start start 222 * @param limit limit 223 * @return <tt>true</tt> if TextLayout is required 224 * <tt>false</tt> if TextLayout is not required 225 */ 226 public static final boolean isComplexLayout(char[] text, int start, int limit) { 227 return FontUtilities.isComplexText(text, start, limit); 228 } 229 230 // 231 // WARNING WARNING WARNING WARNING WARNING WARNING 232 // Many of the following methods are invoked from older API. 233 // As this older API was not passed a Component, a null Component may 234 // now be passsed in. For example, SwingUtilities.computeStringWidth 235 // is implemented to call SwingUtilities2.stringWidth, the 236 // SwingUtilities variant does not take a JComponent, as such 237 // SwingUtilities2.stringWidth can be passed a null Component. 238 // In other words, if you add new functionality to these methods you 239 // need to gracefully handle null. 240 // 241 242 /** 243 * Returns whether or not text should be drawn antialiased. 244 * 245 * @param c JComponent to test. 246 * @return Whether or not text should be drawn antialiased for the 247 * specified component. 248 */ 249 public static AATextInfo drawTextAntialiased(JComponent c) { 250 if (c != null) { 251 /* a non-null property implies some form of AA requested */ 252 return (AATextInfo)c.getClientProperty(AA_TEXT_PROPERTY_KEY); 253 } 254 // No component, assume aa is off 255 return null; 256 } 257 258 /** 259 * Returns the left side bearing of the first character of string. The 260 * left side bearing is calculated from the passed in 261 * FontMetrics. If the passed in String is less than one 262 * character {@code 0} is returned. 263 * 264 * @param c JComponent that will display the string 265 * @param fm FontMetrics used to measure the String width 266 * @param string String to get the left side bearing for. 267 * @throws NullPointerException if {@code string} is {@code null} 268 * 269 * @return the left side bearing of the first character of string 270 * or {@code 0} if the string is empty 271 */ 272 public static int getLeftSideBearing(JComponent c, FontMetrics fm, 273 String string) { 274 if ((string == null) || (string.length() == 0)) { 275 return 0; 276 } 277 return getLeftSideBearing(c, fm, string.charAt(0)); 278 } 279 280 /** 281 * Returns the left side bearing of the first character of string. The 282 * left side bearing is calculated from the passed in FontMetrics. 283 * 284 * @param c JComponent that will display the string 285 * @param fm FontMetrics used to measure the String width 286 * @param firstChar Character to get the left side bearing for. 287 */ 288 public static int getLeftSideBearing(JComponent c, FontMetrics fm, 289 char firstChar) { 290 int charIndex = (int) firstChar; 291 if (charIndex < MAX_CHAR_INDEX && charIndex >= MIN_CHAR_INDEX) { 292 byte[] lsbs = null; 293 294 FontRenderContext frc = getFontRenderContext(c, fm); 295 Font font = fm.getFont(); 296 synchronized (SwingUtilities2.class) { 297 LSBCacheEntry entry = null; 298 if (searchKey == null) { 299 searchKey = new LSBCacheEntry(frc, font); 300 } else { 301 searchKey.reset(frc, font); 302 } 303 // See if we already have an entry for this pair 304 for (LSBCacheEntry cacheEntry : fontCache) { 305 if (searchKey.equals(cacheEntry)) { 306 entry = cacheEntry; 307 break; 308 } 309 } 310 if (entry == null) { 311 // No entry for this pair, add it. 312 entry = searchKey; 313 fontCache[nextIndex] = searchKey; 314 searchKey = null; 315 nextIndex = (nextIndex + 1) % CACHE_SIZE; 316 } 317 return entry.getLeftSideBearing(firstChar); 318 } 319 } 320 return 0; 321 } 322 323 /** 324 * Returns the FontMetrics for the current Font of the passed 325 * in Graphics. This method is used when a Graphics 326 * is available, typically when painting. If a Graphics is not 327 * available the JComponent method of the same name should be used. 328 * <p> 329 * Callers should pass in a non-null JComponent, the exception 330 * to this is if a JComponent is not readily available at the time of 331 * painting. 332 * <p> 333 * This does not necessarily return the FontMetrics from the 334 * Graphics. 335 * 336 * @param c JComponent requesting FontMetrics, may be null 337 * @param g Graphics Graphics 338 */ 339 public static FontMetrics getFontMetrics(JComponent c, Graphics g) { 340 return getFontMetrics(c, g, g.getFont()); 341 } 342 343 344 /** 345 * Returns the FontMetrics for the specified Font. 346 * This method is used when a Graphics is available, typically when 347 * painting. If a Graphics is not available the JComponent method of 348 * the same name should be used. 349 * <p> 350 * Callers should pass in a non-null JComonent, the exception 351 * to this is if a JComponent is not readily available at the time of 352 * painting. 353 * <p> 354 * This does not necessarily return the FontMetrics from the 355 * Graphics. 356 * 357 * @param c JComponent requesting FontMetrics, may be null 358 * @param c Graphics Graphics 359 * @param font Font to get FontMetrics for 360 */ 361 public static FontMetrics getFontMetrics(JComponent c, Graphics g, 362 Font font) { 363 if (c != null) { 364 // Note: We assume that we're using the FontMetrics 365 // from the widget to layout out text, otherwise we can get 366 // mismatches when printing. 367 return c.getFontMetrics(font); 368 } 369 return Toolkit.getDefaultToolkit().getFontMetrics(font); 370 } 371 372 373 /** 374 * Returns the width of the passed in String. 375 * If the passed String is <code>null</code>, returns zero. 376 * 377 * @param c JComponent that will display the string, may be null 378 * @param fm FontMetrics used to measure the String width 379 * @param string String to get the width of 380 */ 381 public static int stringWidth(JComponent c, FontMetrics fm, String string){ 382 if (string == null || string.equals("")) { 383 return 0; 384 } 385 boolean needsTextLayout = ((c != null) && 386 (c.getClientProperty(TextAttribute.NUMERIC_SHAPING) != null)); 387 if (needsTextLayout) { 388 synchronized(charsBufferLock) { 389 int length = syncCharsBuffer(string); 390 needsTextLayout = isComplexLayout(charsBuffer, 0, length); 391 } 392 } 393 if (needsTextLayout) { 394 TextLayout layout = createTextLayout(c, string, 395 fm.getFont(), fm.getFontRenderContext()); 396 return (int) layout.getAdvance(); 397 } else { 398 return fm.stringWidth(string); 399 } 400 } 401 402 403 /** 404 * Clips the passed in String to the space provided. 405 * 406 * @param c JComponent that will display the string, may be null 407 * @param fm FontMetrics used to measure the String width 408 * @param string String to display 409 * @param availTextWidth Amount of space that the string can be drawn in 410 * @return Clipped string that can fit in the provided space. 411 */ 412 public static String clipStringIfNecessary(JComponent c, FontMetrics fm, 413 String string, 414 int availTextWidth) { 415 if ((string == null) || (string.equals(""))) { 416 return ""; 417 } 418 int textWidth = SwingUtilities2.stringWidth(c, fm, string); 419 if (textWidth > availTextWidth) { 420 return SwingUtilities2.clipString(c, fm, string, availTextWidth); 421 } 422 return string; 423 } 424 425 426 /** 427 * Clips the passed in String to the space provided. NOTE: this assumes 428 * the string does not fit in the available space. 429 * 430 * @param c JComponent that will display the string, may be null 431 * @param fm FontMetrics used to measure the String width 432 * @param string String to display 433 * @param availTextWidth Amount of space that the string can be drawn in 434 * @return Clipped string that can fit in the provided space. 435 */ 436 public static String clipString(JComponent c, FontMetrics fm, 437 String string, int availTextWidth) { 438 // c may be null here. 439 String clipString = "..."; 440 availTextWidth -= SwingUtilities2.stringWidth(c, fm, clipString); 441 if (availTextWidth <= 0) { 442 //can not fit any characters 443 return clipString; 444 } 445 446 boolean needsTextLayout; 447 synchronized (charsBufferLock) { 448 int stringLength = syncCharsBuffer(string); 449 needsTextLayout = 450 isComplexLayout(charsBuffer, 0, stringLength); 451 if (!needsTextLayout) { 452 int width = 0; 453 for (int nChars = 0; nChars < stringLength; nChars++) { 454 width += fm.charWidth(charsBuffer[nChars]); 455 if (width > availTextWidth) { 456 string = string.substring(0, nChars); 457 break; 458 } 459 } 460 } 461 } 462 if (needsTextLayout) { 463 FontRenderContext frc = getFontRenderContext(c, fm); 464 AttributedString aString = new AttributedString(string); 465 if (c != null) { 466 aString.addAttribute(TextAttribute.NUMERIC_SHAPING, 467 c.getClientProperty(TextAttribute.NUMERIC_SHAPING)); 468 } 469 LineBreakMeasurer measurer = 470 new LineBreakMeasurer(aString.getIterator(), frc); 471 int nChars = measurer.nextOffset(availTextWidth); 472 string = string.substring(0, nChars); 473 474 } 475 return string + clipString; 476 } 477 478 479 /** 480 * Draws the string at the specified location. 481 * 482 * @param c JComponent that will display the string, may be null 483 * @param g Graphics to draw the text to 484 * @param text String to display 485 * @param x X coordinate to draw the text at 486 * @param y Y coordinate to draw the text at 487 */ 488 public static void drawString(JComponent c, Graphics g, String text, 489 int x, int y) { 490 // c may be null 491 492 // All non-editable widgets that draw strings call into this 493 // methods. By non-editable that means widgets like JLabel, JButton 494 // but NOT JTextComponents. 495 if ( text == null || text.length() <= 0 ) { //no need to paint empty strings 496 return; 497 } 498 if (isPrinting(g)) { 499 Graphics2D g2d = getGraphics2D(g); 500 if (g2d != null) { 501 /* The printed text must scale linearly with the UI. 502 * Calculate the width on screen, obtain a TextLayout with 503 * advances for the printer graphics FRC, and then justify 504 * it to fit in the screen width. This distributes the spacing 505 * more evenly than directly laying out to the screen advances. 506 */ 507 String trimmedText = trimTrailingSpaces(text); 508 if (!trimmedText.isEmpty()) { 509 float screenWidth = (float) g2d.getFont().getStringBounds 510 (trimmedText, DEFAULT_FRC).getWidth(); 511 TextLayout layout = createTextLayout(c, text, g2d.getFont(), 512 g2d.getFontRenderContext()); 513 514 layout = layout.getJustifiedLayout(screenWidth); 515 /* Use alternate print color if specified */ 516 Color col = g2d.getColor(); 517 if (col instanceof PrintColorUIResource) { 518 g2d.setColor(((PrintColorUIResource)col).getPrintColor()); 519 } 520 521 layout.draw(g2d, x, y); 522 523 g2d.setColor(col); 524 } 525 526 return; 527 } 528 } 529 530 // If we get here we're not printing 531 if (g instanceof Graphics2D) { 532 AATextInfo info = drawTextAntialiased(c); 533 Graphics2D g2 = (Graphics2D)g; 534 535 boolean needsTextLayout = ((c != null) && 536 (c.getClientProperty(TextAttribute.NUMERIC_SHAPING) != null)); 537 538 if (needsTextLayout) { 539 synchronized(charsBufferLock) { 540 int length = syncCharsBuffer(text); 541 needsTextLayout = isComplexLayout(charsBuffer, 0, length); 542 } 543 } 544 545 if (info != null) { 546 Object oldContrast = null; 547 Object oldAAValue = g2.getRenderingHint(KEY_TEXT_ANTIALIASING); 548 if (info.aaHint != oldAAValue) { 549 g2.setRenderingHint(KEY_TEXT_ANTIALIASING, info.aaHint); 550 } else { 551 oldAAValue = null; 552 } 553 if (info.lcdContrastHint != null) { 554 oldContrast = g2.getRenderingHint(KEY_TEXT_LCD_CONTRAST); 555 if (info.lcdContrastHint.equals(oldContrast)) { 556 oldContrast = null; 557 } else { 558 g2.setRenderingHint(KEY_TEXT_LCD_CONTRAST, 559 info.lcdContrastHint); 560 } 561 } 562 563 if (needsTextLayout) { 564 TextLayout layout = createTextLayout(c, text, g2.getFont(), 565 g2.getFontRenderContext()); 566 layout.draw(g2, x, y); 567 } else { 568 g.drawString(text, x, y); 569 } 570 571 if (oldAAValue != null) { 572 g2.setRenderingHint(KEY_TEXT_ANTIALIASING, oldAAValue); 573 } 574 if (oldContrast != null) { 575 g2.setRenderingHint(KEY_TEXT_LCD_CONTRAST, oldContrast); 576 } 577 578 return; 579 } 580 581 if (needsTextLayout){ 582 TextLayout layout = createTextLayout(c, text, g2.getFont(), 583 g2.getFontRenderContext()); 584 layout.draw(g2, x, y); 585 return; 586 } 587 } 588 589 g.drawString(text, x, y); 590 } 591 592 /** 593 * Draws the string at the specified location underlining the specified 594 * character. 595 * 596 * @param c JComponent that will display the string, may be null 597 * @param g Graphics to draw the text to 598 * @param text String to display 599 * @param underlinedIndex Index of a character in the string to underline 600 * @param x X coordinate to draw the text at 601 * @param y Y coordinate to draw the text at 602 */ 603 public static void drawStringUnderlineCharAt(JComponent c,Graphics g, 604 String text, int underlinedIndex, int x,int y) { 605 if (text == null || text.length() <= 0) { 606 return; 607 } 608 SwingUtilities2.drawString(c, g, text, x, y); 609 int textLength = text.length(); 610 if (underlinedIndex >= 0 && underlinedIndex < textLength ) { 611 int underlineRectY = y; 612 int underlineRectHeight = 1; 613 int underlineRectX = 0; 614 int underlineRectWidth = 0; 615 boolean isPrinting = isPrinting(g); 616 boolean needsTextLayout = isPrinting; 617 if (!needsTextLayout) { 618 synchronized (charsBufferLock) { 619 syncCharsBuffer(text); 620 needsTextLayout = 621 isComplexLayout(charsBuffer, 0, textLength); 622 } 623 } 624 if (!needsTextLayout) { 625 FontMetrics fm = g.getFontMetrics(); 626 underlineRectX = x + 627 SwingUtilities2.stringWidth(c,fm, 628 text.substring(0,underlinedIndex)); 629 underlineRectWidth = fm.charWidth(text. 630 charAt(underlinedIndex)); 631 } else { 632 Graphics2D g2d = getGraphics2D(g); 633 if (g2d != null) { 634 TextLayout layout = 635 createTextLayout(c, text, g2d.getFont(), 636 g2d.getFontRenderContext()); 637 if (isPrinting) { 638 float screenWidth = (float)g2d.getFont(). 639 getStringBounds(text, DEFAULT_FRC).getWidth(); 640 layout = layout.getJustifiedLayout(screenWidth); 641 } 642 TextHitInfo leading = 643 TextHitInfo.leading(underlinedIndex); 644 TextHitInfo trailing = 645 TextHitInfo.trailing(underlinedIndex); 646 Shape shape = 647 layout.getVisualHighlightShape(leading, trailing); 648 Rectangle rect = shape.getBounds(); 649 underlineRectX = x + rect.x; 650 underlineRectWidth = rect.width; 651 } 652 } 653 g.fillRect(underlineRectX, underlineRectY + 1, 654 underlineRectWidth, underlineRectHeight); 655 } 656 } 657 658 659 /** 660 * A variation of locationToIndex() which only returns an index if the 661 * Point is within the actual bounds of a list item (not just in the cell) 662 * and if the JList has the "List.isFileList" client property set. 663 * Otherwise, this method returns -1. 664 * This is used to make WindowsL&F JFileChooser act like native dialogs. 665 */ 666 public static int loc2IndexFileList(JList list, Point point) { 667 int index = list.locationToIndex(point); 668 if (index != -1) { 669 Object bySize = list.getClientProperty("List.isFileList"); 670 if (bySize instanceof Boolean && ((Boolean)bySize).booleanValue() && 671 !pointIsInActualBounds(list, index, point)) { 672 index = -1; 673 } 674 } 675 return index; 676 } 677 678 679 /** 680 * Returns true if the given point is within the actual bounds of the 681 * JList item at index (not just inside the cell). 682 */ 683 private static boolean pointIsInActualBounds(JList list, int index, 684 Point point) { 685 ListCellRenderer renderer = list.getCellRenderer(); 686 ListModel dataModel = list.getModel(); 687 Object value = dataModel.getElementAt(index); 688 Component item = renderer.getListCellRendererComponent(list, 689 value, index, false, false); 690 Dimension itemSize = item.getPreferredSize(); 691 Rectangle cellBounds = list.getCellBounds(index, index); 692 if (!item.getComponentOrientation().isLeftToRight()) { 693 cellBounds.x += (cellBounds.width - itemSize.width); 694 } 695 cellBounds.width = itemSize.width; 696 697 return cellBounds.contains(point); 698 } 699 700 701 /** 702 * Returns true if the given point is outside the preferredSize of the 703 * item at the given row of the table. (Column must be 0). 704 * Does not check the "Table.isFileList" property. That should be checked 705 * before calling this method. 706 * This is used to make WindowsL&F JFileChooser act like native dialogs. 707 */ 708 public static boolean pointOutsidePrefSize(JTable table, int row, int column, Point p) { 709 if (table.convertColumnIndexToModel(column) != 0 || row == -1) { 710 return true; 711 } 712 TableCellRenderer tcr = table.getCellRenderer(row, column); 713 Object value = table.getValueAt(row, column); 714 Component cell = tcr.getTableCellRendererComponent(table, value, false, 715 false, row, column); 716 Dimension itemSize = cell.getPreferredSize(); 717 Rectangle cellBounds = table.getCellRect(row, column, false); 718 cellBounds.width = itemSize.width; 719 cellBounds.height = itemSize.height; 720 721 // See if coords are inside 722 // ASSUME: mouse x,y will never be < cell's x,y 723 assert (p.x >= cellBounds.x && p.y >= cellBounds.y); 724 return p.x > cellBounds.x + cellBounds.width || 725 p.y > cellBounds.y + cellBounds.height; 726 } 727 728 /** 729 * Set the lead and anchor without affecting selection. 730 */ 731 public static void setLeadAnchorWithoutSelection(ListSelectionModel model, 732 int lead, int anchor) { 733 if (anchor == -1) { 734 anchor = lead; 735 } 736 if (lead == -1) { 737 model.setAnchorSelectionIndex(-1); 738 model.setLeadSelectionIndex(-1); 739 } else { 740 if (model.isSelectedIndex(lead)) { 741 model.addSelectionInterval(lead, lead); 742 } else { 743 model.removeSelectionInterval(lead, lead); 744 } 745 model.setAnchorSelectionIndex(anchor); 746 } 747 } 748 749 /** 750 * Ignore mouse events if the component is null, not enabled, the event 751 * is not associated with the left mouse button, or the event has been 752 * consumed. 753 */ 754 public static boolean shouldIgnore(MouseEvent me, JComponent c) { 755 return c == null || !c.isEnabled() 756 || !SwingUtilities.isLeftMouseButton(me) 757 || me.isConsumed(); 758 } 759 760 /** 761 * Request focus on the given component if it doesn't already have it 762 * and <code>isRequestFocusEnabled()</code> returns true. 763 */ 764 public static void adjustFocus(JComponent c) { 765 if (!c.hasFocus() && c.isRequestFocusEnabled()) { 766 c.requestFocus(); 767 } 768 } 769 770 /** 771 * The following draw functions have the same semantic as the 772 * Graphics methods with the same names. 773 * 774 * this is used for printing 775 */ 776 public static int drawChars(JComponent c, Graphics g, 777 char[] data, 778 int offset, 779 int length, 780 int x, 781 int y) { 782 if ( length <= 0 ) { //no need to paint empty strings 783 return x; 784 } 785 int nextX = x + getFontMetrics(c, g).charsWidth(data, offset, length); 786 if (isPrinting(g)) { 787 Graphics2D g2d = getGraphics2D(g); 788 if (g2d != null) { 789 FontRenderContext deviceFontRenderContext = g2d. 790 getFontRenderContext(); 791 FontRenderContext frc = getFontRenderContext(c); 792 if (frc != null && 793 !isFontRenderContextPrintCompatible 794 (deviceFontRenderContext, frc)) { 795 796 String text = new String(data, offset, length); 797 TextLayout layout = new TextLayout(text, g2d.getFont(), 798 deviceFontRenderContext); 799 String trimmedText = trimTrailingSpaces(text); 800 if (!trimmedText.isEmpty()) { 801 float screenWidth = (float)g2d.getFont(). 802 getStringBounds(trimmedText, frc).getWidth(); 803 layout = layout.getJustifiedLayout(screenWidth); 804 805 /* Use alternate print color if specified */ 806 Color col = g2d.getColor(); 807 if (col instanceof PrintColorUIResource) { 808 g2d.setColor(((PrintColorUIResource)col).getPrintColor()); 809 } 810 811 layout.draw(g2d,x,y); 812 813 g2d.setColor(col); 814 } 815 816 return nextX; 817 } 818 } 819 } 820 // Assume we're not printing if we get here, or that we are invoked 821 // via Swing text printing which is laid out for the printer. 822 AATextInfo info = drawTextAntialiased(c); 823 if (info != null && (g instanceof Graphics2D)) { 824 Graphics2D g2 = (Graphics2D)g; 825 826 Object oldContrast = null; 827 Object oldAAValue = g2.getRenderingHint(KEY_TEXT_ANTIALIASING); 828 if (info.aaHint != null && info.aaHint != oldAAValue) { 829 g2.setRenderingHint(KEY_TEXT_ANTIALIASING, info.aaHint); 830 } else { 831 oldAAValue = null; 832 } 833 if (info.lcdContrastHint != null) { 834 oldContrast = g2.getRenderingHint(KEY_TEXT_LCD_CONTRAST); 835 if (info.lcdContrastHint.equals(oldContrast)) { 836 oldContrast = null; 837 } else { 838 g2.setRenderingHint(KEY_TEXT_LCD_CONTRAST, 839 info.lcdContrastHint); 840 } 841 } 842 843 g.drawChars(data, offset, length, x, y); 844 845 if (oldAAValue != null) { 846 g2.setRenderingHint(KEY_TEXT_ANTIALIASING, oldAAValue); 847 } 848 if (oldContrast != null) { 849 g2.setRenderingHint(KEY_TEXT_LCD_CONTRAST, oldContrast); 850 } 851 } 852 else { 853 g.drawChars(data, offset, length, x, y); 854 } 855 return nextX; 856 } 857 858 /* 859 * see documentation for drawChars 860 * returns the advance 861 */ 862 public static float drawString(JComponent c, Graphics g, 863 AttributedCharacterIterator iterator, 864 int x, 865 int y) { 866 867 float retVal; 868 boolean isPrinting = isPrinting(g); 869 Color col = g.getColor(); 870 871 if (isPrinting) { 872 /* Use alternate print color if specified */ 873 if (col instanceof PrintColorUIResource) { 874 g.setColor(((PrintColorUIResource)col).getPrintColor()); 875 } 876 } 877 878 Graphics2D g2d = getGraphics2D(g); 879 if (g2d == null) { 880 g.drawString(iterator,x,y); //for the cases where advance 881 //matters it should not happen 882 retVal = x; 883 884 } else { 885 FontRenderContext frc; 886 if (isPrinting) { 887 frc = getFontRenderContext(c); 888 if (frc.isAntiAliased() || frc.usesFractionalMetrics()) { 889 frc = new FontRenderContext(frc.getTransform(), false, false); 890 } 891 } else if ((frc = getFRCProperty(c)) != null) { 892 /* frc = frc; ! */ 893 } else { 894 frc = g2d.getFontRenderContext(); 895 } 896 TextLayout layout; 897 if (isPrinting) { 898 FontRenderContext deviceFRC = g2d.getFontRenderContext(); 899 if (!isFontRenderContextPrintCompatible(frc, deviceFRC)) { 900 layout = new TextLayout(iterator, deviceFRC); 901 AttributedCharacterIterator trimmedIt = 902 getTrimmedTrailingSpacesIterator(iterator); 903 if (trimmedIt != null) { 904 float screenWidth = new TextLayout(trimmedIt, frc). 905 getAdvance(); 906 layout = layout.getJustifiedLayout(screenWidth); 907 } 908 } else { 909 layout = new TextLayout(iterator, frc); 910 } 911 } else { 912 layout = new TextLayout(iterator, frc); 913 } 914 layout.draw(g2d, x, y); 915 retVal = layout.getAdvance(); 916 } 917 918 if (isPrinting) { 919 g.setColor(col); 920 } 921 922 return retVal; 923 } 924 925 private static TextLayout createTextLayout(JComponent c, String s, 926 Font f, FontRenderContext frc) { 927 Object shaper = (c == null ? 928 null : c.getClientProperty(TextAttribute.NUMERIC_SHAPING)); 929 if (shaper == null) { 930 return new TextLayout(s, f, frc); 931 } else { 932 Map<TextAttribute, Object> a = new HashMap<TextAttribute, Object>(); 933 a.put(TextAttribute.FONT, f); 934 a.put(TextAttribute.NUMERIC_SHAPING, shaper); 935 return new TextLayout(s, a, frc); 936 } 937 } 938 939 /* 940 * Checks if two given FontRenderContexts are compatible for printing. 941 * We can't just use equals as we want to exclude from the comparison : 942 * + whether AA is set as irrelevant for printing and shouldn't affect 943 * printed metrics anyway 944 * + any translation component in the transform of either FRC, as it 945 * does not affect metrics. 946 * Compatible means no special handling needed for text painting 947 */ 948 private static boolean 949 isFontRenderContextPrintCompatible(FontRenderContext frc1, 950 FontRenderContext frc2) { 951 952 if (frc1 == frc2) { 953 return true; 954 } 955 956 if (frc1 == null || frc2 == null) { // not supposed to happen 957 return false; 958 } 959 960 if (frc1.getFractionalMetricsHint() != 961 frc2.getFractionalMetricsHint()) { 962 return false; 963 } 964 965 /* If both are identity, return true */ 966 if (!frc1.isTransformed() && !frc2.isTransformed()) { 967 return true; 968 } 969 970 /* That's the end of the cheap tests, need to get and compare 971 * the transform matrices. We don't care about the translation 972 * components, so return true if they are otherwise identical. 973 */ 974 double[] mat1 = new double[4]; 975 double[] mat2 = new double[4]; 976 frc1.getTransform().getMatrix(mat1); 977 frc2.getTransform().getMatrix(mat2); 978 return 979 mat1[0] == mat2[0] && 980 mat1[1] == mat2[1] && 981 mat1[2] == mat2[2] && 982 mat1[3] == mat2[3]; 983 } 984 985 /* 986 * Tries it best to get Graphics2D out of the given Graphics 987 * returns null if can not derive it. 988 */ 989 public static Graphics2D getGraphics2D(Graphics g) { 990 if (g instanceof Graphics2D) { 991 return (Graphics2D) g; 992 } else if (g instanceof ProxyPrintGraphics) { 993 return (Graphics2D)(((ProxyPrintGraphics)g).getGraphics()); 994 } else { 995 return null; 996 } 997 } 998 999 /* 1000 * Returns FontRenderContext associated with Component. 1001 * FontRenderContext from Component.getFontMetrics is associated 1002 * with the component. 1003 * 1004 * Uses Component.getFontMetrics to get the FontRenderContext from. 1005 * see JComponent.getFontMetrics and TextLayoutStrategy.java 1006 */ 1007 public static FontRenderContext getFontRenderContext(Component c) { 1008 assert c != null; 1009 if (c == null) { 1010 return DEFAULT_FRC; 1011 } else { 1012 return c.getFontMetrics(c.getFont()).getFontRenderContext(); 1013 } 1014 } 1015 1016 /** 1017 * A convenience method to get FontRenderContext. 1018 * Returns the FontRenderContext for the passed in FontMetrics or 1019 * for the passed in Component if FontMetrics is null 1020 */ 1021 private static FontRenderContext getFontRenderContext(Component c, FontMetrics fm) { 1022 assert fm != null || c!= null; 1023 return (fm != null) ? fm.getFontRenderContext() 1024 : getFontRenderContext(c); 1025 } 1026 1027 /* 1028 * This method is to be used only for JComponent.getFontMetrics. 1029 * In all other places to get FontMetrics we need to use 1030 * JComponent.getFontMetrics. 1031 * 1032 */ 1033 public static FontMetrics getFontMetrics(JComponent c, Font font) { 1034 FontRenderContext frc = getFRCProperty(c); 1035 if (frc == null) { 1036 frc = DEFAULT_FRC; 1037 } 1038 return FontDesignMetrics.getMetrics(font, frc); 1039 } 1040 1041 1042 /* Get any FontRenderContext associated with a JComponent 1043 * - may return null 1044 */ 1045 private static FontRenderContext getFRCProperty(JComponent c) { 1046 if (c != null) { 1047 AATextInfo info = 1048 (AATextInfo)c.getClientProperty(AA_TEXT_PROPERTY_KEY); 1049 if (info != null) { 1050 return info.frc; 1051 } 1052 } 1053 return null; 1054 } 1055 1056 /* 1057 * returns true if the Graphics is print Graphics 1058 * false otherwise 1059 */ 1060 static boolean isPrinting(Graphics g) { 1061 return (g instanceof PrinterGraphics || g instanceof PrintGraphics); 1062 } 1063 1064 private static String trimTrailingSpaces(String s) { 1065 int i = s.length() - 1; 1066 while(i >= 0 && Character.isWhitespace(s.charAt(i))) { 1067 i--; 1068 } 1069 return s.substring(0, i + 1); 1070 } 1071 1072 private static AttributedCharacterIterator getTrimmedTrailingSpacesIterator 1073 (AttributedCharacterIterator iterator) { 1074 int curIdx = iterator.getIndex(); 1075 1076 char c = iterator.last(); 1077 while(c != CharacterIterator.DONE && Character.isWhitespace(c)) { 1078 c = iterator.previous(); 1079 } 1080 1081 if (c != CharacterIterator.DONE) { 1082 int endIdx = iterator.getIndex(); 1083 1084 if (endIdx == iterator.getEndIndex() - 1) { 1085 iterator.setIndex(curIdx); 1086 return iterator; 1087 } else { 1088 AttributedString trimmedText = new AttributedString(iterator, 1089 iterator.getBeginIndex(), endIdx + 1); 1090 return trimmedText.getIterator(); 1091 } 1092 } else { 1093 return null; 1094 } 1095 } 1096 1097 /** 1098 * Determines whether the SelectedTextColor should be used for painting text 1099 * foreground for the specified highlight. 1100 * 1101 * Returns true only if the highlight painter for the specified highlight 1102 * is the swing painter (whether inner class of javax.swing.text.DefaultHighlighter 1103 * or com.sun.java.swing.plaf.windows.WindowsTextUI) and its background color 1104 * is null or equals to the selection color of the text component. 1105 * 1106 * This is a hack for fixing both bugs 4761990 and 5003294 1107 */ 1108 public static boolean useSelectedTextColor(Highlighter.Highlight h, JTextComponent c) { 1109 Highlighter.HighlightPainter painter = h.getPainter(); 1110 String painterClass = painter.getClass().getName(); 1111 if (painterClass.indexOf("javax.swing.text.DefaultHighlighter") != 0 && 1112 painterClass.indexOf("com.sun.java.swing.plaf.windows.WindowsTextUI") != 0) { 1113 return false; 1114 } 1115 try { 1116 DefaultHighlighter.DefaultHighlightPainter defPainter = 1117 (DefaultHighlighter.DefaultHighlightPainter) painter; 1118 if (defPainter.getColor() != null && 1119 !defPainter.getColor().equals(c.getSelectionColor())) { 1120 return false; 1121 } 1122 } catch (ClassCastException e) { 1123 return false; 1124 } 1125 return true; 1126 } 1127 1128 /** 1129 * LSBCacheEntry is used to cache the left side bearing (lsb) for 1130 * a particular <code>Font</code> and <code>FontRenderContext</code>. 1131 * This only caches characters that fall in the range 1132 * <code>MIN_CHAR_INDEX</code> to <code>MAX_CHAR_INDEX</code>. 1133 */ 1134 private static class LSBCacheEntry { 1135 // Used to indicate a particular entry in lsb has not been set. 1136 private static final byte UNSET = Byte.MAX_VALUE; 1137 // Used in creating a GlyphVector to get the lsb 1138 private static final char[] oneChar = new char[1]; 1139 1140 private byte[] lsbCache; 1141 private Font font; 1142 private FontRenderContext frc; 1143 1144 1145 public LSBCacheEntry(FontRenderContext frc, Font font) { 1146 lsbCache = new byte[MAX_CHAR_INDEX - MIN_CHAR_INDEX]; 1147 reset(frc, font); 1148 1149 } 1150 1151 public void reset(FontRenderContext frc, Font font) { 1152 this.font = font; 1153 this.frc = frc; 1154 for (int counter = lsbCache.length - 1; counter >= 0; counter--) { 1155 lsbCache[counter] = UNSET; 1156 } 1157 } 1158 1159 public int getLeftSideBearing(char aChar) { 1160 int index = aChar - MIN_CHAR_INDEX; 1161 assert (index >= 0 && index < (MAX_CHAR_INDEX - MIN_CHAR_INDEX)); 1162 byte lsb = lsbCache[index]; 1163 if (lsb == UNSET) { 1164 oneChar[0] = aChar; 1165 GlyphVector gv = font.createGlyphVector(frc, oneChar); 1166 lsb = (byte) gv.getGlyphPixelBounds(0, frc, 0f, 0f).x; 1167 if (lsb < 0) { 1168 /* HRGB/HBGR LCD glyph images will always have a pixel 1169 * on the left used in colour fringe reduction. 1170 * Text rendering positions this correctly but here 1171 * we are using the glyph image to adjust that position 1172 * so must account for it. 1173 */ 1174 Object aaHint = frc.getAntiAliasingHint(); 1175 if (aaHint == VALUE_TEXT_ANTIALIAS_LCD_HRGB || 1176 aaHint == VALUE_TEXT_ANTIALIAS_LCD_HBGR) { 1177 lsb++; 1178 } 1179 } 1180 lsbCache[index] = lsb; 1181 } 1182 return lsb; 1183 1184 1185 } 1186 1187 public boolean equals(Object entry) { 1188 if (entry == this) { 1189 return true; 1190 } 1191 if (!(entry instanceof LSBCacheEntry)) { 1192 return false; 1193 } 1194 LSBCacheEntry oEntry = (LSBCacheEntry) entry; 1195 return (font.equals(oEntry.font) && 1196 frc.equals(oEntry.frc)); 1197 } 1198 1199 public int hashCode() { 1200 int result = 17; 1201 if (font != null) { 1202 result = 37 * result + font.hashCode(); 1203 } 1204 if (frc != null) { 1205 result = 37 * result + frc.hashCode(); 1206 } 1207 return result; 1208 } 1209 } 1210 1211 /* 1212 * here goes the fix for 4856343 [Problem with applet interaction 1213 * with system selection clipboard] 1214 * 1215 * NOTE. In case isTrustedContext() no checking 1216 * are to be performed 1217 */ 1218 1219 /** 1220 * checks the security permissions for accessing system clipboard 1221 * 1222 * for untrusted context (see isTrustedContext) checks the 1223 * permissions for the current event being handled 1224 * 1225 */ 1226 public static boolean canAccessSystemClipboard() { 1227 boolean canAccess = false; 1228 if (!GraphicsEnvironment.isHeadless()) { 1229 SecurityManager sm = System.getSecurityManager(); 1230 if (sm == null) { 1231 canAccess = true; 1232 } else { 1233 try { 1234 sm.checkPermission(AWTPermissions.ACCESS_CLIPBOARD_PERMISSION); 1235 canAccess = true; 1236 } catch (SecurityException e) { 1237 } 1238 if (canAccess && ! isTrustedContext()) { 1239 canAccess = canCurrentEventAccessSystemClipboard(true); 1240 } 1241 } 1242 } 1243 return canAccess; 1244 } 1245 /** 1246 * Returns true if EventQueue.getCurrentEvent() has the permissions to 1247 * access the system clipboard 1248 */ 1249 public static boolean canCurrentEventAccessSystemClipboard() { 1250 return isTrustedContext() 1251 || canCurrentEventAccessSystemClipboard(false); 1252 } 1253 1254 /** 1255 * Returns true if the given event has permissions to access the 1256 * system clipboard 1257 * 1258 * @param e AWTEvent to check 1259 */ 1260 public static boolean canEventAccessSystemClipboard(AWTEvent e) { 1261 return isTrustedContext() 1262 || canEventAccessSystemClipboard(e, false); 1263 } 1264 1265 /** 1266 * returns canAccessSystemClipboard field from InputEvent 1267 * 1268 * @param ie InputEvent to get the field from 1269 */ 1270 private static synchronized boolean inputEvent_canAccessSystemClipboard(InputEvent ie) { 1271 if (inputEvent_CanAccessSystemClipboard_Field == null) { 1272 inputEvent_CanAccessSystemClipboard_Field = 1273 AccessController.doPrivileged( 1274 new java.security.PrivilegedAction<Field>() { 1275 public Field run() { 1276 try { 1277 Field field = InputEvent.class. 1278 getDeclaredField("canAccessSystemClipboard"); 1279 field.setAccessible(true); 1280 return field; 1281 } catch (SecurityException e) { 1282 } catch (NoSuchFieldException e) { 1283 } 1284 return null; 1285 } 1286 }); 1287 } 1288 if (inputEvent_CanAccessSystemClipboard_Field == null) { 1289 return false; 1290 } 1291 boolean ret = false; 1292 try { 1293 ret = inputEvent_CanAccessSystemClipboard_Field. 1294 getBoolean(ie); 1295 } catch(IllegalAccessException e) { 1296 } 1297 return ret; 1298 } 1299 1300 /** 1301 * Returns true if the given event is corrent gesture for 1302 * accessing clipboard 1303 * 1304 * @param ie InputEvent to check 1305 */ 1306 1307 private static boolean isAccessClipboardGesture(InputEvent ie) { 1308 boolean allowedGesture = false; 1309 if (ie instanceof KeyEvent) { //we can validate only keyboard gestures 1310 KeyEvent ke = (KeyEvent)ie; 1311 int keyCode = ke.getKeyCode(); 1312 int keyModifiers = ke.getModifiers(); 1313 switch(keyCode) { 1314 case KeyEvent.VK_C: 1315 case KeyEvent.VK_V: 1316 case KeyEvent.VK_X: 1317 allowedGesture = (keyModifiers == InputEvent.CTRL_MASK); 1318 break; 1319 case KeyEvent.VK_INSERT: 1320 allowedGesture = (keyModifiers == InputEvent.CTRL_MASK || 1321 keyModifiers == InputEvent.SHIFT_MASK); 1322 break; 1323 case KeyEvent.VK_COPY: 1324 case KeyEvent.VK_PASTE: 1325 case KeyEvent.VK_CUT: 1326 allowedGesture = true; 1327 break; 1328 case KeyEvent.VK_DELETE: 1329 allowedGesture = ( keyModifiers == InputEvent.SHIFT_MASK); 1330 break; 1331 } 1332 } 1333 return allowedGesture; 1334 } 1335 1336 /** 1337 * Returns true if e has the permissions to 1338 * access the system clipboard and if it is allowed gesture (if 1339 * checkGesture is true) 1340 * 1341 * @param e AWTEvent to check 1342 * @param checkGesture boolean 1343 */ 1344 private static boolean canEventAccessSystemClipboard(AWTEvent e, 1345 boolean checkGesture) { 1346 if (EventQueue.isDispatchThread()) { 1347 /* 1348 * Checking event permissions makes sense only for event 1349 * dispathing thread 1350 */ 1351 if (e instanceof InputEvent 1352 && (! checkGesture || isAccessClipboardGesture((InputEvent)e))) { 1353 return inputEvent_canAccessSystemClipboard((InputEvent)e); 1354 } else { 1355 return false; 1356 } 1357 } else { 1358 return true; 1359 } 1360 } 1361 1362 /** 1363 * Utility method that throws SecurityException if SecurityManager is set 1364 * and modifiers are not public 1365 * 1366 * @param modifiers a set of modifiers 1367 */ 1368 public static void checkAccess(int modifiers) { 1369 if (System.getSecurityManager() != null 1370 && !Modifier.isPublic(modifiers)) { 1371 throw new SecurityException("Resource is not accessible"); 1372 } 1373 } 1374 1375 /** 1376 * Returns true if EventQueue.getCurrentEvent() has the permissions to 1377 * access the system clipboard and if it is allowed gesture (if 1378 * checkGesture true) 1379 * 1380 * @param checkGesture boolean 1381 */ 1382 private static boolean canCurrentEventAccessSystemClipboard(boolean 1383 checkGesture) { 1384 AWTEvent event = EventQueue.getCurrentEvent(); 1385 return canEventAccessSystemClipboard(event, checkGesture); 1386 } 1387 1388 /** 1389 * see RFE 5012841 [Per AppContect security permissions] for the 1390 * details 1391 * 1392 */ 1393 private static boolean isTrustedContext() { 1394 return (System.getSecurityManager() == null) 1395 || (AppContext.getAppContext(). 1396 get(UntrustedClipboardAccess) == null); 1397 } 1398 1399 public static String displayPropertiesToCSS(Font font, Color fg) { 1400 StringBuffer rule = new StringBuffer("body {"); 1401 if (font != null) { 1402 rule.append(" font-family: "); 1403 rule.append(font.getFamily()); 1404 rule.append(" ; "); 1405 rule.append(" font-size: "); 1406 rule.append(font.getSize()); 1407 rule.append("pt ;"); 1408 if (font.isBold()) { 1409 rule.append(" font-weight: 700 ; "); 1410 } 1411 if (font.isItalic()) { 1412 rule.append(" font-style: italic ; "); 1413 } 1414 } 1415 if (fg != null) { 1416 rule.append(" color: #"); 1417 if (fg.getRed() < 16) { 1418 rule.append('0'); 1419 } 1420 rule.append(Integer.toHexString(fg.getRed())); 1421 if (fg.getGreen() < 16) { 1422 rule.append('0'); 1423 } 1424 rule.append(Integer.toHexString(fg.getGreen())); 1425 if (fg.getBlue() < 16) { 1426 rule.append('0'); 1427 } 1428 rule.append(Integer.toHexString(fg.getBlue())); 1429 rule.append(" ; "); 1430 } 1431 rule.append(" }"); 1432 return rule.toString(); 1433 } 1434 1435 /** 1436 * Utility method that creates a <code>UIDefaults.LazyValue</code> that 1437 * creates an <code>ImageIcon</code> <code>UIResource</code> for the 1438 * specified image file name. The image is loaded using 1439 * <code>getResourceAsStream</code>, starting with a call to that method 1440 * on the base class parameter. If it cannot be found, searching will 1441 * continue through the base class' inheritance hierarchy, up to and 1442 * including <code>rootClass</code>. 1443 * 1444 * @param baseClass the first class to use in searching for the resource 1445 * @param rootClass an ancestor of <code>baseClass</code> to finish the 1446 * search at 1447 * @param imageFile the name of the file to be found 1448 * @return a lazy value that creates the <code>ImageIcon</code> 1449 * <code>UIResource</code> for the image, 1450 * or null if it cannot be found 1451 */ 1452 public static Object makeIcon(final Class<?> baseClass, 1453 final Class<?> rootClass, 1454 final String imageFile) { 1455 1456 return new UIDefaults.LazyValue() { 1457 public Object createValue(UIDefaults table) { 1458 /* Copy resource into a byte array. This is 1459 * necessary because several browsers consider 1460 * Class.getResource a security risk because it 1461 * can be used to load additional classes. 1462 * Class.getResourceAsStream just returns raw 1463 * bytes, which we can convert to an image. 1464 */ 1465 byte[] buffer = 1466 java.security.AccessController.doPrivileged( 1467 new java.security.PrivilegedAction<byte[]>() { 1468 public byte[] run() { 1469 try { 1470 InputStream resource = null; 1471 Class<?> srchClass = baseClass; 1472 1473 while (srchClass != null) { 1474 resource = srchClass.getResourceAsStream(imageFile); 1475 1476 if (resource != null || srchClass == rootClass) { 1477 break; 1478 } 1479 1480 srchClass = srchClass.getSuperclass(); 1481 } 1482 1483 if (resource == null) { 1484 return null; 1485 } 1486 1487 BufferedInputStream in = 1488 new BufferedInputStream(resource); 1489 ByteArrayOutputStream out = 1490 new ByteArrayOutputStream(1024); 1491 byte[] buffer = new byte[1024]; 1492 int n; 1493 while ((n = in.read(buffer)) > 0) { 1494 out.write(buffer, 0, n); 1495 } 1496 in.close(); 1497 out.flush(); 1498 return out.toByteArray(); 1499 } catch (IOException ioe) { 1500 System.err.println(ioe.toString()); 1501 } 1502 return null; 1503 } 1504 }); 1505 1506 if (buffer == null) { 1507 return null; 1508 } 1509 if (buffer.length == 0) { 1510 System.err.println("warning: " + imageFile + 1511 " is zero-length"); 1512 return null; 1513 } 1514 1515 return new ImageIconUIResource(buffer); 1516 } 1517 }; 1518 } 1519 1520 /* Used to help decide if AA text rendering should be used, so 1521 * this local display test should be additionally qualified 1522 * against whether we have XRender support on both ends of the wire, 1523 * as with that support remote performance may be good enough to turn 1524 * on by default. An additional complication there is XRender does not 1525 * appear capable of performing gamma correction needed for LCD text. 1526 */ 1527 public static boolean isLocalDisplay() { 1528 boolean isLocal; 1529 GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); 1530 if (ge instanceof SunGraphicsEnvironment) { 1531 isLocal = ((SunGraphicsEnvironment) ge).isDisplayLocal(); 1532 } else { 1533 isLocal = true; 1534 } 1535 return isLocal; 1536 } 1537 1538 /** 1539 * Returns an integer from the defaults table. If <code>key</code> does 1540 * not map to a valid <code>Integer</code>, or can not be convered from 1541 * a <code>String</code> to an integer, the value 0 is returned. 1542 * 1543 * @param key an <code>Object</code> specifying the int. 1544 * @return the int 1545 */ 1546 public static int getUIDefaultsInt(Object key) { 1547 return getUIDefaultsInt(key, 0); 1548 } 1549 1550 /** 1551 * Returns an integer from the defaults table that is appropriate 1552 * for the given locale. If <code>key</code> does not map to a valid 1553 * <code>Integer</code>, or can not be convered from a <code>String</code> 1554 * to an integer, the value 0 is returned. 1555 * 1556 * @param key an <code>Object</code> specifying the int. Returned value 1557 * is 0 if <code>key</code> is not available, 1558 * @param l the <code>Locale</code> for which the int is desired 1559 * @return the int 1560 */ 1561 public static int getUIDefaultsInt(Object key, Locale l) { 1562 return getUIDefaultsInt(key, l, 0); 1563 } 1564 1565 /** 1566 * Returns an integer from the defaults table. If <code>key</code> does 1567 * not map to a valid <code>Integer</code>, or can not be convered from 1568 * a <code>String</code> to an integer, <code>default</code> is 1569 * returned. 1570 * 1571 * @param key an <code>Object</code> specifying the int. Returned value 1572 * is 0 if <code>key</code> is not available, 1573 * @param defaultValue Returned value if <code>key</code> is not available, 1574 * or is not an Integer 1575 * @return the int 1576 */ 1577 public static int getUIDefaultsInt(Object key, int defaultValue) { 1578 return getUIDefaultsInt(key, null, defaultValue); 1579 } 1580 1581 /** 1582 * Returns an integer from the defaults table that is appropriate 1583 * for the given locale. If <code>key</code> does not map to a valid 1584 * <code>Integer</code>, or can not be convered from a <code>String</code> 1585 * to an integer, <code>default</code> is returned. 1586 * 1587 * @param key an <code>Object</code> specifying the int. Returned value 1588 * is 0 if <code>key</code> is not available, 1589 * @param l the <code>Locale</code> for which the int is desired 1590 * @param defaultValue Returned value if <code>key</code> is not available, 1591 * or is not an Integer 1592 * @return the int 1593 */ 1594 public static int getUIDefaultsInt(Object key, Locale l, int defaultValue) { 1595 Object value = UIManager.get(key, l); 1596 1597 if (value instanceof Integer) { 1598 return ((Integer)value).intValue(); 1599 } 1600 if (value instanceof String) { 1601 try { 1602 return Integer.parseInt((String)value); 1603 } catch (NumberFormatException nfe) {} 1604 } 1605 return defaultValue; 1606 } 1607 1608 // At this point we need this method here. But we assume that there 1609 // will be a common method for this purpose in the future releases. 1610 public static Component compositeRequestFocus(Component component) { 1611 if (component instanceof Container) { 1612 Container container = (Container)component; 1613 if (container.isFocusCycleRoot()) { 1614 FocusTraversalPolicy policy = container.getFocusTraversalPolicy(); 1615 Component comp = policy.getDefaultComponent(container); 1616 if (comp!=null) { 1617 comp.requestFocus(); 1618 return comp; 1619 } 1620 } 1621 Container rootAncestor = container.getFocusCycleRootAncestor(); 1622 if (rootAncestor!=null) { 1623 FocusTraversalPolicy policy = rootAncestor.getFocusTraversalPolicy(); 1624 Component comp = policy.getComponentAfter(rootAncestor, container); 1625 1626 if (comp!=null && SwingUtilities.isDescendingFrom(comp, container)) { 1627 comp.requestFocus(); 1628 return comp; 1629 } 1630 } 1631 } 1632 if (component.isFocusable()) { 1633 component.requestFocus(); 1634 return component; 1635 } 1636 return null; 1637 } 1638 1639 /** 1640 * Change focus to the visible component in {@code JTabbedPane}. 1641 * This is not a general-purpose method and is here only to permit 1642 * sharing code. 1643 */ 1644 public static boolean tabbedPaneChangeFocusTo(Component comp) { 1645 if (comp != null) { 1646 if (comp.isFocusTraversable()) { 1647 SwingUtilities2.compositeRequestFocus(comp); 1648 return true; 1649 } else if (comp instanceof JComponent 1650 && ((JComponent)comp).requestDefaultFocus()) { 1651 1652 return true; 1653 } 1654 } 1655 1656 return false; 1657 } 1658 1659 /** 1660 * Submits a value-returning task for execution on the EDT and 1661 * returns a Future representing the pending results of the task. 1662 * 1663 * @param task the task to submit 1664 * @return a Future representing pending completion of the task 1665 * @throws NullPointerException if the task is null 1666 */ 1667 public static <V> Future<V> submit(Callable<V> task) { 1668 if (task == null) { 1669 throw new NullPointerException(); 1670 } 1671 FutureTask<V> future = new FutureTask<V>(task); 1672 execute(future); 1673 return future; 1674 } 1675 1676 /** 1677 * Submits a Runnable task for execution on the EDT and returns a 1678 * Future representing that task. 1679 * 1680 * @param task the task to submit 1681 * @param result the result to return upon successful completion 1682 * @return a Future representing pending completion of the task, 1683 * and whose <tt>get()</tt> method will return the given 1684 * result value upon completion 1685 * @throws NullPointerException if the task is null 1686 */ 1687 public static <V> Future<V> submit(Runnable task, V result) { 1688 if (task == null) { 1689 throw new NullPointerException(); 1690 } 1691 FutureTask<V> future = new FutureTask<V>(task, result); 1692 execute(future); 1693 return future; 1694 } 1695 1696 /** 1697 * Sends a Runnable to the EDT for the execution. 1698 */ 1699 private static void execute(Runnable command) { 1700 SwingUtilities.invokeLater(command); 1701 } 1702 1703 /** 1704 * Sets the {@code SKIP_CLICK_COUNT} client property on the component 1705 * if it is an instance of {@code JTextComponent} with a 1706 * {@code DefaultCaret}. This property, used for text components acting 1707 * as editors in a table or tree, tells {@code DefaultCaret} how many 1708 * clicks to skip before starting selection. 1709 */ 1710 public static void setSkipClickCount(Component comp, int count) { 1711 if (comp instanceof JTextComponent 1712 && ((JTextComponent) comp).getCaret() instanceof DefaultCaret) { 1713 1714 ((JTextComponent) comp).putClientProperty(SKIP_CLICK_COUNT, count); 1715 } 1716 } 1717 1718 /** 1719 * Return the MouseEvent's click count, possibly reduced by the value of 1720 * the component's {@code SKIP_CLICK_COUNT} client property. Clears 1721 * the {@code SKIP_CLICK_COUNT} property if the mouse event's click count 1722 * is 1. In order for clearing of the property to work correctly, there 1723 * must be a mousePressed implementation on the caller with this 1724 * call as the first line. 1725 */ 1726 public static int getAdjustedClickCount(JTextComponent comp, MouseEvent e) { 1727 int cc = e.getClickCount(); 1728 1729 if (cc == 1) { 1730 comp.putClientProperty(SKIP_CLICK_COUNT, null); 1731 } else { 1732 Integer sub = (Integer) comp.getClientProperty(SKIP_CLICK_COUNT); 1733 if (sub != null) { 1734 return cc - sub; 1735 } 1736 } 1737 1738 return cc; 1739 } 1740 1741 /** 1742 * Used by the {@code liesIn} method to return which section 1743 * the point lies in. 1744 * 1745 * @see #liesIn 1746 */ 1747 public enum Section { 1748 1749 /** The leading section */ 1750 LEADING, 1751 1752 /** The middle section */ 1753 MIDDLE, 1754 1755 /** The trailing section */ 1756 TRAILING 1757 } 1758 1759 /** 1760 * This method divides a rectangle into two or three sections along 1761 * the specified axis and determines which section the given point 1762 * lies in on that axis; used by drag and drop when calculating drop 1763 * locations. 1764 * <p> 1765 * For two sections, the rectangle is divided equally and the method 1766 * returns whether the point lies in {@code Section.LEADING} or 1767 * {@code Section.TRAILING}. For horizontal divisions, the calculation 1768 * respects component orientation. 1769 * <p> 1770 * For three sections, if the rectangle is greater than or equal to 1771 * 30 pixels in length along the axis, the calculation gives 10 pixels 1772 * to each of the leading and trailing sections and the remainder to the 1773 * middle. For smaller sizes, the rectangle is divided equally into three 1774 * sections. 1775 * <p> 1776 * Note: This method assumes that the point is within the bounds of 1777 * the given rectangle on the specified axis. However, in cases where 1778 * it isn't, the results still have meaning: {@code Section.MIDDLE} 1779 * remains the same, {@code Section.LEADING} indicates that the point 1780 * is in or somewhere before the leading section, and 1781 * {@code Section.TRAILING} indicates that the point is in or somewhere 1782 * after the trailing section. 1783 * 1784 * @param rect the rectangle 1785 * @param p the point the check 1786 * @param horizontal {@code true} to use the horizontal axis, 1787 * or {@code false} for the vertical axis 1788 * @param ltr {@code true} for left to right orientation, 1789 * or {@code false} for right to left orientation; 1790 * only used for horizontal calculations 1791 * @param three {@code true} for three sections, 1792 * or {@code false} for two 1793 * 1794 * @return the {@code Section} where the point lies 1795 * 1796 * @throws NullPointerException if {@code rect} or {@code p} are 1797 * {@code null} 1798 */ 1799 private static Section liesIn(Rectangle rect, Point p, boolean horizontal, 1800 boolean ltr, boolean three) { 1801 1802 /* beginning of the rectangle on the axis */ 1803 int p0; 1804 1805 /* point on the axis we're interested in */ 1806 int pComp; 1807 1808 /* length of the rectangle on the axis */ 1809 int length; 1810 1811 /* value of ltr if horizontal, else true */ 1812 boolean forward; 1813 1814 if (horizontal) { 1815 p0 = rect.x; 1816 pComp = p.x; 1817 length = rect.width; 1818 forward = ltr; 1819 } else { 1820 p0 = rect.y; 1821 pComp = p.y; 1822 length = rect.height; 1823 forward = true; 1824 } 1825 1826 if (three) { 1827 int boundary = (length >= 30) ? 10 : length / 3; 1828 1829 if (pComp < p0 + boundary) { 1830 return forward ? Section.LEADING : Section.TRAILING; 1831 } else if (pComp >= p0 + length - boundary) { 1832 return forward ? Section.TRAILING : Section.LEADING; 1833 } 1834 1835 return Section.MIDDLE; 1836 } else { 1837 int middle = p0 + length / 2; 1838 if (forward) { 1839 return pComp >= middle ? Section.TRAILING : Section.LEADING; 1840 } else { 1841 return pComp < middle ? Section.TRAILING : Section.LEADING; 1842 } 1843 } 1844 } 1845 1846 /** 1847 * This method divides a rectangle into two or three sections along 1848 * the horizontal axis and determines which section the given point 1849 * lies in; used by drag and drop when calculating drop locations. 1850 * <p> 1851 * See the documentation for {@link #liesIn} for more information 1852 * on how the section is calculated. 1853 * 1854 * @param rect the rectangle 1855 * @param p the point the check 1856 * @param ltr {@code true} for left to right orientation, 1857 * or {@code false} for right to left orientation 1858 * @param three {@code true} for three sections, 1859 * or {@code false} for two 1860 * 1861 * @return the {@code Section} where the point lies 1862 * 1863 * @throws NullPointerException if {@code rect} or {@code p} are 1864 * {@code null} 1865 */ 1866 public static Section liesInHorizontal(Rectangle rect, Point p, 1867 boolean ltr, boolean three) { 1868 return liesIn(rect, p, true, ltr, three); 1869 } 1870 1871 /** 1872 * This method divides a rectangle into two or three sections along 1873 * the vertical axis and determines which section the given point 1874 * lies in; used by drag and drop when calculating drop locations. 1875 * <p> 1876 * See the documentation for {@link #liesIn} for more information 1877 * on how the section is calculated. 1878 * 1879 * @param rect the rectangle 1880 * @param p the point the check 1881 * @param three {@code true} for three sections, 1882 * or {@code false} for two 1883 * 1884 * @return the {@code Section} where the point lies 1885 * 1886 * @throws NullPointerException if {@code rect} or {@code p} are 1887 * {@code null} 1888 */ 1889 public static Section liesInVertical(Rectangle rect, Point p, 1890 boolean three) { 1891 return liesIn(rect, p, false, false, three); 1892 } 1893 1894 /** 1895 * Maps the index of the column in the view at 1896 * {@code viewColumnIndex} to the index of the column 1897 * in the table model. Returns the index of the corresponding 1898 * column in the model. If {@code viewColumnIndex} 1899 * is less than zero, returns {@code viewColumnIndex}. 1900 * 1901 * @param cm the table model 1902 * @param viewColumnIndex the index of the column in the view 1903 * @return the index of the corresponding column in the model 1904 * 1905 * @see JTable#convertColumnIndexToModel(int) 1906 * @see javax.swing.plaf.basic.BasicTableHeaderUI 1907 */ 1908 public static int convertColumnIndexToModel(TableColumnModel cm, 1909 int viewColumnIndex) { 1910 if (viewColumnIndex < 0) { 1911 return viewColumnIndex; 1912 } 1913 return cm.getColumn(viewColumnIndex).getModelIndex(); 1914 } 1915 1916 /** 1917 * Maps the index of the column in the {@code cm} at 1918 * {@code modelColumnIndex} to the index of the column 1919 * in the view. Returns the index of the 1920 * corresponding column in the view; returns {@code -1} if this column 1921 * is not being displayed. If {@code modelColumnIndex} is less than zero, 1922 * returns {@code modelColumnIndex}. 1923 * 1924 * @param cm the table model 1925 * @param modelColumnIndex the index of the column in the model 1926 * @return the index of the corresponding column in the view 1927 * 1928 * @see JTable#convertColumnIndexToView(int) 1929 * @see javax.swing.plaf.basic.BasicTableHeaderUI 1930 */ 1931 public static int convertColumnIndexToView(TableColumnModel cm, 1932 int modelColumnIndex) { 1933 if (modelColumnIndex < 0) { 1934 return modelColumnIndex; 1935 } 1936 for (int column = 0; column < cm.getColumnCount(); column++) { 1937 if (cm.getColumn(column).getModelIndex() == modelColumnIndex) { 1938 return column; 1939 } 1940 } 1941 return -1; 1942 } 1943 1944 public static int getSystemMnemonicKeyMask() { 1945 Toolkit toolkit = Toolkit.getDefaultToolkit(); 1946 if (toolkit instanceof SunToolkit) { 1947 return ((SunToolkit) toolkit).getFocusAcceleratorKeyMask(); 1948 } 1949 return InputEvent.ALT_MASK; 1950 } 1951 1952 /** 1953 * Returns the {@link TreePath} that identifies the changed nodes. 1954 * 1955 * @param event changes in a tree model 1956 * @param model corresponing tree model 1957 * @return the path to the changed nodes 1958 */ 1959 public static TreePath getTreePath(TreeModelEvent event, TreeModel model) { 1960 TreePath path = event.getTreePath(); 1961 if ((path == null) && (model != null)) { 1962 Object root = model.getRoot(); 1963 if (root != null) { 1964 path = new TreePath(root); 1965 } 1966 } 1967 return path; 1968 } 1969 }