1 /*
2 * Copyright (c) 2002, 2014, 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<java.awt.RenderingHints.Key, Object> 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 @SuppressWarnings("unchecked")
145 public static AATextInfo getAATextInfo(boolean lafCondition) {
146 SunToolkit.setAAFontSettingsCondition(lafCondition);
147 Toolkit tk = Toolkit.getDefaultToolkit();
148 Object map = tk.getDesktopProperty(SunToolkit.DESKTOPFONTHINTS);
149 if (map instanceof Map) {
150 return getAATextInfoFromMap((Map<java.awt.RenderingHints.Key, Object>)map);
151 } else {
152 return null;
153 }
154 }
155
156 Object aaHint;
157 Integer lcdContrastHint;
158 FontRenderContext frc;
159
160 /* These are rarely constructed objects, and only when a complete
161 * UI is being updated, so the cost of the tests here is minimal
162 * and saves tests elsewhere.
163 * We test that the values are ones we support/expect.
164 */
165 public AATextInfo(Object aaHint, Integer lcdContrastHint) {
166 if (aaHint == null) {
167 throw new InternalError("null not allowed here");
168 }
169 if (aaHint == VALUE_TEXT_ANTIALIAS_OFF ||
170 aaHint == VALUE_TEXT_ANTIALIAS_DEFAULT) {
171 throw new InternalError("AA must be on");
172 }
173 this.aaHint = aaHint;
174 this.lcdContrastHint = lcdContrastHint;
175 this.frc = new FontRenderContext(null, aaHint,
176 VALUE_FRACTIONALMETRICS_DEFAULT);
177 }
178 }
179
180 /**
181 * Key used in client properties used to indicate that the
182 * <code>ComponentUI</code> of the JComponent instance should be returned.
183 */
184 public static final Object COMPONENT_UI_PROPERTY_KEY =
185 new StringBuffer("ComponentUIPropertyKey");
186
187 /** Client Property key for the text maximal offsets for BasicMenuItemUI */
188 public static final StringUIClientPropertyKey BASICMENUITEMUI_MAX_TEXT_OFFSET =
189 new StringUIClientPropertyKey ("maxTextOffset");
190
191 // security stuff
192 private static Field inputEvent_CanAccessSystemClipboard_Field = null;
193 private static final String UntrustedClipboardAccess =
194 "UNTRUSTED_CLIPBOARD_ACCESS_KEY";
195
196 //all access to charsBuffer is to be synchronized on charsBufferLock
197 private static final int CHAR_BUFFER_SIZE = 100;
198 private static final Object charsBufferLock = new Object();
199 private static char[] charsBuffer = new char[CHAR_BUFFER_SIZE];
200
201 static {
202 fontCache = new LSBCacheEntry[CACHE_SIZE];
203 }
204
205 /**
206 * Fill the character buffer cache. Return the buffer length.
207 */
208 private static int syncCharsBuffer(String s) {
209 int length = s.length();
210 if ((charsBuffer == null) || (charsBuffer.length < length)) {
211 charsBuffer = s.toCharArray();
212 } else {
213 s.getChars(0, length, charsBuffer, 0);
214 }
215 return length;
216 }
217
218 /**
219 * checks whether TextLayout is required to handle characters.
220 *
221 * @param text characters to be tested
222 * @param start start
223 * @param limit limit
224 * @return <tt>true</tt> if TextLayout is required
225 * <tt>false</tt> if TextLayout is not required
226 */
227 public static final boolean isComplexLayout(char[] text, int start, int limit) {
228 return FontUtilities.isComplexText(text, start, limit);
229 }
230
231 //
232 // WARNING WARNING WARNING WARNING WARNING WARNING
233 // Many of the following methods are invoked from older API.
234 // As this older API was not passed a Component, a null Component may
235 // now be passsed in. For example, SwingUtilities.computeStringWidth
236 // is implemented to call SwingUtilities2.stringWidth, the
237 // SwingUtilities variant does not take a JComponent, as such
238 // SwingUtilities2.stringWidth can be passed a null Component.
239 // In other words, if you add new functionality to these methods you
240 // need to gracefully handle null.
241 //
242
243 /**
244 * Returns whether or not text should be drawn antialiased.
245 *
246 * @param c JComponent to test.
247 * @return Whether or not text should be drawn antialiased for the
248 * specified component.
249 */
250 public static AATextInfo drawTextAntialiased(JComponent c) {
251 if (c != null) {
252 /* a non-null property implies some form of AA requested */
253 return (AATextInfo)c.getClientProperty(AA_TEXT_PROPERTY_KEY);
254 }
255 // No component, assume aa is off
256 return null;
257 }
258
259 /**
260 * Returns the left side bearing of the first character of string. The
261 * left side bearing is calculated from the passed in
262 * FontMetrics. If the passed in String is less than one
263 * character {@code 0} is returned.
264 *
265 * @param c JComponent that will display the string
266 * @param fm FontMetrics used to measure the String width
267 * @param string String to get the left side bearing for.
268 * @throws NullPointerException if {@code string} is {@code null}
269 *
270 * @return the left side bearing of the first character of string
271 * or {@code 0} if the string is empty
272 */
273 public static int getLeftSideBearing(JComponent c, FontMetrics fm,
274 String string) {
275 if ((string == null) || (string.length() == 0)) {
276 return 0;
277 }
278 return getLeftSideBearing(c, fm, string.charAt(0));
279 }
280
281 /**
282 * Returns the left side bearing of the first character of string. The
283 * left side bearing is calculated from the passed in FontMetrics.
284 *
285 * @param c JComponent that will display the string
286 * @param fm FontMetrics used to measure the String width
287 * @param firstChar Character to get the left side bearing for.
288 */
289 public static int getLeftSideBearing(JComponent c, FontMetrics fm,
290 char firstChar) {
291 int charIndex = (int) firstChar;
292 if (charIndex < MAX_CHAR_INDEX && charIndex >= MIN_CHAR_INDEX) {
293 byte[] lsbs = null;
294
295 FontRenderContext frc = getFontRenderContext(c, fm);
296 Font font = fm.getFont();
297 synchronized (SwingUtilities2.class) {
298 LSBCacheEntry entry = null;
299 if (searchKey == null) {
300 searchKey = new LSBCacheEntry(frc, font);
301 } else {
302 searchKey.reset(frc, font);
303 }
304 // See if we already have an entry for this pair
305 for (LSBCacheEntry cacheEntry : fontCache) {
306 if (searchKey.equals(cacheEntry)) {
307 entry = cacheEntry;
308 break;
309 }
310 }
311 if (entry == null) {
312 // No entry for this pair, add it.
313 entry = searchKey;
314 fontCache[nextIndex] = searchKey;
315 searchKey = null;
316 nextIndex = (nextIndex + 1) % CACHE_SIZE;
317 }
318 return entry.getLeftSideBearing(firstChar);
319 }
320 }
321 return 0;
322 }
323
324 /**
325 * Returns the FontMetrics for the current Font of the passed
326 * in Graphics. This method is used when a Graphics
327 * is available, typically when painting. If a Graphics is not
328 * available the JComponent method of the same name should be used.
329 * <p>
330 * Callers should pass in a non-null JComponent, the exception
331 * to this is if a JComponent is not readily available at the time of
332 * painting.
333 * <p>
334 * This does not necessarily return the FontMetrics from the
335 * Graphics.
336 *
337 * @param c JComponent requesting FontMetrics, may be null
338 * @param g Graphics Graphics
339 */
340 public static FontMetrics getFontMetrics(JComponent c, Graphics g) {
341 return getFontMetrics(c, g, g.getFont());
342 }
343
344
345 /**
346 * Returns the FontMetrics for the specified Font.
347 * This method is used when a Graphics is available, typically when
348 * painting. If a Graphics is not available the JComponent method of
349 * the same name should be used.
350 * <p>
351 * Callers should pass in a non-null JComonent, the exception
352 * to this is if a JComponent is not readily available at the time of
353 * painting.
354 * <p>
355 * This does not necessarily return the FontMetrics from the
356 * Graphics.
357 *
358 * @param c JComponent requesting FontMetrics, may be null
359 * @param c Graphics Graphics
360 * @param font Font to get FontMetrics for
361 */
362 public static FontMetrics getFontMetrics(JComponent c, Graphics g,
363 Font font) {
364 if (c != null) {
365 // Note: We assume that we're using the FontMetrics
366 // from the widget to layout out text, otherwise we can get
367 // mismatches when printing.
368 return c.getFontMetrics(font);
369 }
370 return Toolkit.getDefaultToolkit().getFontMetrics(font);
371 }
372
373
374 /**
375 * Returns the width of the passed in String.
376 * If the passed String is <code>null</code>, returns zero.
377 *
378 * @param c JComponent that will display the string, may be null
379 * @param fm FontMetrics used to measure the String width
380 * @param string String to get the width of
381 */
382 public static int stringWidth(JComponent c, FontMetrics fm, String string){
383 if (string == null || string.equals("")) {
384 return 0;
385 }
386 boolean needsTextLayout = ((c != null) &&
387 (c.getClientProperty(TextAttribute.NUMERIC_SHAPING) != null));
388 if (needsTextLayout) {
389 synchronized(charsBufferLock) {
390 int length = syncCharsBuffer(string);
391 needsTextLayout = isComplexLayout(charsBuffer, 0, length);
392 }
393 }
394 if (needsTextLayout) {
395 TextLayout layout = createTextLayout(c, string,
396 fm.getFont(), fm.getFontRenderContext());
397 return (int) layout.getAdvance();
398 } else {
399 return fm.stringWidth(string);
400 }
401 }
402
403
404 /**
405 * Clips the passed in String to the space provided.
406 *
407 * @param c JComponent that will display the string, may be null
408 * @param fm FontMetrics used to measure the String width
409 * @param string String to display
410 * @param availTextWidth Amount of space that the string can be drawn in
411 * @return Clipped string that can fit in the provided space.
412 */
413 public static String clipStringIfNecessary(JComponent c, FontMetrics fm,
414 String string,
415 int availTextWidth) {
416 if ((string == null) || (string.equals(""))) {
417 return "";
418 }
419 int textWidth = SwingUtilities2.stringWidth(c, fm, string);
420 if (textWidth > availTextWidth) {
421 return SwingUtilities2.clipString(c, fm, string, availTextWidth);
422 }
423 return string;
424 }
425
426
427 /**
428 * Clips the passed in String to the space provided. NOTE: this assumes
429 * the string does not fit in the available space.
430 *
431 * @param c JComponent that will display the string, may be null
432 * @param fm FontMetrics used to measure the String width
433 * @param string String to display
434 * @param availTextWidth Amount of space that the string can be drawn in
435 * @return Clipped string that can fit in the provided space.
436 */
437 public static String clipString(JComponent c, FontMetrics fm,
438 String string, int availTextWidth) {
439 // c may be null here.
440 String clipString = "...";
441 availTextWidth -= SwingUtilities2.stringWidth(c, fm, clipString);
442 if (availTextWidth <= 0) {
443 //can not fit any characters
444 return clipString;
445 }
446
447 boolean needsTextLayout;
448 synchronized (charsBufferLock) {
449 int stringLength = syncCharsBuffer(string);
450 needsTextLayout =
451 isComplexLayout(charsBuffer, 0, stringLength);
452 if (!needsTextLayout) {
453 int width = 0;
454 for (int nChars = 0; nChars < stringLength; nChars++) {
455 width += fm.charWidth(charsBuffer[nChars]);
456 if (width > availTextWidth) {
457 string = string.substring(0, nChars);
458 break;
459 }
460 }
461 }
462 }
463 if (needsTextLayout) {
464 FontRenderContext frc = getFontRenderContext(c, fm);
465 AttributedString aString = new AttributedString(string);
466 if (c != null) {
467 aString.addAttribute(TextAttribute.NUMERIC_SHAPING,
468 c.getClientProperty(TextAttribute.NUMERIC_SHAPING));
469 }
470 LineBreakMeasurer measurer =
471 new LineBreakMeasurer(aString.getIterator(), frc);
472 int nChars = measurer.nextOffset(availTextWidth);
473 string = string.substring(0, nChars);
474
475 }
476 return string + clipString;
477 }
478
479
480 /**
481 * Draws the string at the specified location.
482 *
483 * @param c JComponent that will display the string, may be null
484 * @param g Graphics to draw the text to
485 * @param text String to display
486 * @param x X coordinate to draw the text at
487 * @param y Y coordinate to draw the text at
488 */
489 public static void drawString(JComponent c, Graphics g, String text,
490 int x, int y) {
491 // c may be null
492
493 // All non-editable widgets that draw strings call into this
494 // methods. By non-editable that means widgets like JLabel, JButton
495 // but NOT JTextComponents.
496 if ( text == null || text.length() <= 0 ) { //no need to paint empty strings
497 return;
498 }
499 if (isPrinting(g)) {
500 Graphics2D g2d = getGraphics2D(g);
501 if (g2d != null) {
502 /* The printed text must scale linearly with the UI.
503 * Calculate the width on screen, obtain a TextLayout with
504 * advances for the printer graphics FRC, and then justify
505 * it to fit in the screen width. This distributes the spacing
506 * more evenly than directly laying out to the screen advances.
507 */
508 String trimmedText = trimTrailingSpaces(text);
509 if (!trimmedText.isEmpty()) {
510 float screenWidth = (float) g2d.getFont().getStringBounds
511 (trimmedText, DEFAULT_FRC).getWidth();
512 TextLayout layout = createTextLayout(c, text, g2d.getFont(),
513 g2d.getFontRenderContext());
514
515 layout = layout.getJustifiedLayout(screenWidth);
516 /* Use alternate print color if specified */
517 Color col = g2d.getColor();
518 if (col instanceof PrintColorUIResource) {
519 g2d.setColor(((PrintColorUIResource)col).getPrintColor());
520 }
521
522 layout.draw(g2d, x, y);
523
524 g2d.setColor(col);
525 }
526
527 return;
528 }
529 }
530
531 // If we get here we're not printing
532 if (g instanceof Graphics2D) {
533 AATextInfo info = drawTextAntialiased(c);
534 Graphics2D g2 = (Graphics2D)g;
535
536 boolean needsTextLayout = ((c != null) &&
537 (c.getClientProperty(TextAttribute.NUMERIC_SHAPING) != null));
538
539 if (needsTextLayout) {
540 synchronized(charsBufferLock) {
541 int length = syncCharsBuffer(text);
542 needsTextLayout = isComplexLayout(charsBuffer, 0, length);
543 }
544 }
545
546 if (info != null) {
547 Object oldContrast = null;
548 Object oldAAValue = g2.getRenderingHint(KEY_TEXT_ANTIALIASING);
549 if (info.aaHint != oldAAValue) {
550 g2.setRenderingHint(KEY_TEXT_ANTIALIASING, info.aaHint);
551 } else {
552 oldAAValue = null;
553 }
554 if (info.lcdContrastHint != null) {
555 oldContrast = g2.getRenderingHint(KEY_TEXT_LCD_CONTRAST);
556 if (info.lcdContrastHint.equals(oldContrast)) {
557 oldContrast = null;
558 } else {
559 g2.setRenderingHint(KEY_TEXT_LCD_CONTRAST,
560 info.lcdContrastHint);
561 }
562 }
563
564 if (needsTextLayout) {
565 TextLayout layout = createTextLayout(c, text, g2.getFont(),
566 g2.getFontRenderContext());
567 layout.draw(g2, x, y);
568 } else {
569 g.drawString(text, x, y);
570 }
571
572 if (oldAAValue != null) {
573 g2.setRenderingHint(KEY_TEXT_ANTIALIASING, oldAAValue);
574 }
575 if (oldContrast != null) {
576 g2.setRenderingHint(KEY_TEXT_LCD_CONTRAST, oldContrast);
577 }
578
579 return;
580 }
581
582 if (needsTextLayout){
583 TextLayout layout = createTextLayout(c, text, g2.getFont(),
584 g2.getFontRenderContext());
585 layout.draw(g2, x, y);
586 return;
587 }
588 }
589
590 g.drawString(text, x, y);
591 }
592
593 /**
594 * Draws the string at the specified location underlining the specified
595 * character.
596 *
597 * @param c JComponent that will display the string, may be null
598 * @param g Graphics to draw the text to
599 * @param text String to display
600 * @param underlinedIndex Index of a character in the string to underline
601 * @param x X coordinate to draw the text at
602 * @param y Y coordinate to draw the text at
603 */
604 public static void drawStringUnderlineCharAt(JComponent c,Graphics g,
605 String text, int underlinedIndex, int x,int y) {
606 if (text == null || text.length() <= 0) {
607 return;
608 }
609 SwingUtilities2.drawString(c, g, text, x, y);
610 int textLength = text.length();
611 if (underlinedIndex >= 0 && underlinedIndex < textLength ) {
612 int underlineRectY = y;
613 int underlineRectHeight = 1;
614 int underlineRectX = 0;
615 int underlineRectWidth = 0;
616 boolean isPrinting = isPrinting(g);
617 boolean needsTextLayout = isPrinting;
618 if (!needsTextLayout) {
619 synchronized (charsBufferLock) {
620 syncCharsBuffer(text);
621 needsTextLayout =
622 isComplexLayout(charsBuffer, 0, textLength);
623 }
624 }
625 if (!needsTextLayout) {
626 FontMetrics fm = g.getFontMetrics();
627 underlineRectX = x +
628 SwingUtilities2.stringWidth(c,fm,
629 text.substring(0,underlinedIndex));
630 underlineRectWidth = fm.charWidth(text.
631 charAt(underlinedIndex));
632 } else {
633 Graphics2D g2d = getGraphics2D(g);
634 if (g2d != null) {
635 TextLayout layout =
636 createTextLayout(c, text, g2d.getFont(),
637 g2d.getFontRenderContext());
638 if (isPrinting) {
639 float screenWidth = (float)g2d.getFont().
640 getStringBounds(text, DEFAULT_FRC).getWidth();
641 layout = layout.getJustifiedLayout(screenWidth);
642 }
643 TextHitInfo leading =
644 TextHitInfo.leading(underlinedIndex);
645 TextHitInfo trailing =
646 TextHitInfo.trailing(underlinedIndex);
647 Shape shape =
648 layout.getVisualHighlightShape(leading, trailing);
649 Rectangle rect = shape.getBounds();
650 underlineRectX = x + rect.x;
651 underlineRectWidth = rect.width;
652 }
653 }
654 g.fillRect(underlineRectX, underlineRectY + 1,
655 underlineRectWidth, underlineRectHeight);
656 }
657 }
658
659
660 /**
661 * A variation of locationToIndex() which only returns an index if the
662 * Point is within the actual bounds of a list item (not just in the cell)
663 * and if the JList has the "List.isFileList" client property set.
664 * Otherwise, this method returns -1.
665 * This is used to make WindowsL&F JFileChooser act like native dialogs.
666 */
667 public static int loc2IndexFileList(JList<?> list, Point point) {
668 int index = list.locationToIndex(point);
669 if (index != -1) {
670 Object bySize = list.getClientProperty("List.isFileList");
671 if (bySize instanceof Boolean && ((Boolean)bySize).booleanValue() &&
672 !pointIsInActualBounds(list, index, point)) {
673 index = -1;
674 }
675 }
676 return index;
677 }
678
679
680 /**
681 * Returns true if the given point is within the actual bounds of the
682 * JList item at index (not just inside the cell).
683 */
684 private static <T> boolean pointIsInActualBounds(JList<T> list, int index,
685 Point point) {
686 ListCellRenderer<? super T> renderer = list.getCellRenderer();
687 T value = list.getModel().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 }