forked from jgraph/mxgraph
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathmxUtils.java
More file actions
executable file
·2466 lines (2175 loc) · 63.5 KB
/
mxUtils.java
File metadata and controls
executable file
·2466 lines (2175 loc) · 63.5 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/**
* $Id: mxUtils.java,v 1.137 2013/12/04 16:29:51 gaudenz Exp $
* Copyright (c) 2007-2012, JGraph Ltd
*/
package com.mxgraph.util;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.font.FontRenderContext;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.awt.image.ImageObserver;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Comparator;
import java.util.Formatter;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.SortedSet;
import java.util.Stack;
import java.util.TreeSet;
import javax.imageio.ImageIO;
import javax.swing.text.html.HTMLDocument;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import com.mxgraph.io.mxCodecRegistry;
import com.mxgraph.model.mxCellPath;
import com.mxgraph.model.mxICell;
import com.mxgraph.model.mxIGraphModel;
import com.mxgraph.view.mxCellState;
/**
* Contains various helper methods for use with mxGraph.
*/
public class mxUtils
{
/**
* True if the machine is a Mac.
*/
public static boolean IS_MAC = System.getProperty("os.name").toLowerCase()
.indexOf("mac") >= 0;
/**
* True if the machine is running a linux kernel.
*/
public static boolean IS_LINUX = System.getProperty("os.name").toLowerCase()
.indexOf("linux") >= 0;
/**
* Static Graphics used for Font Metrics.
*/
protected static transient Graphics fontGraphics;
// Creates a renderer for HTML markup (only possible in
// non-headless environment)
static
{
try
{
fontGraphics = new BufferedImage(1, 1, BufferedImage.TYPE_INT_RGB)
.getGraphics();
}
catch (Exception e)
{
// ignore
}
}
/**
* Returns the size for the given label. If isHtml is true then any HTML
* markup in the label is computed as HTML and all newlines inside the HTML
* body are converted into linebreaks.
*/
public static mxRectangle getLabelSize(String label,
Map<String, Object> style, boolean isHtml, double scale)
{
return getLabelSize(label, style, isHtml, scale, 0);
}
/**
* Returns the size for the given label. If isHtml is true then any HTML
* markup in the label is computed as HTML and all newlines inside the HTML
* body are converted into linebreaks.
*/
public static mxRectangle getLabelSize(String label,
Map<String, Object> style, boolean isHtml, double scale,
double htmlWrapWidth)
{
mxRectangle size;
if (isHtml)
{
size = getSizeForHtml(getBodyMarkup(label, true), style, scale,
htmlWrapWidth);
}
else
{
size = getSizeForString(label, getFont(style), scale);
}
return size;
}
/**
* Returns the body part of the given HTML markup.
*/
public static String getBodyMarkup(String markup, boolean replaceLinefeeds)
{
String lowerCase = markup.toLowerCase();
int bodyStart = lowerCase.indexOf("<body>");
if (bodyStart >= 0)
{
bodyStart += 7;
int bodyEnd = lowerCase.lastIndexOf("</body>");
if (bodyEnd > bodyStart)
{
markup = markup.substring(bodyStart, bodyEnd).trim();
}
}
if (replaceLinefeeds)
{
markup = markup.replaceAll("\n", "<br>");
}
return markup;
}
/**
* Returns the paint bounds for the given label.
*/
public static mxRectangle getLabelPaintBounds(String label,
Map<String, Object> style, boolean isHtml, mxPoint offset,
mxRectangle vertexBounds, double scale)
{
double wrapWidth = 0;
if (isHtml
&& vertexBounds != null
&& mxUtils.getString(style, mxConstants.STYLE_WHITE_SPACE,
"nowrap").equals("wrap"))
{
wrapWidth = vertexBounds.getWidth();
}
mxRectangle size = mxUtils.getLabelSize(label, style, isHtml, scale,
wrapWidth);
// Measures font with full scale and scales back
size.setWidth(size.getWidth() / scale);
size.setHeight(size.getHeight() / scale);
double x = offset.getX();
double y = offset.getY();
double width = 0;
double height = 0;
if (vertexBounds != null)
{
x += vertexBounds.getX();
y += vertexBounds.getY();
if (mxUtils.getString(style, mxConstants.STYLE_SHAPE, "").equals(
mxConstants.SHAPE_SWIMLANE))
{
// Limits the label to the swimlane title
boolean horizontal = mxUtils.isTrue(style,
mxConstants.STYLE_HORIZONTAL, true);
double start = mxUtils.getDouble(style,
mxConstants.STYLE_STARTSIZE,
mxConstants.DEFAULT_STARTSIZE)
* scale;
if (horizontal)
{
width += vertexBounds.getWidth();
height += start;
}
else
{
width += start;
height += vertexBounds.getHeight();
}
}
else
{
width += vertexBounds.getWidth();
height += vertexBounds.getHeight();
}
}
return mxUtils.getScaledLabelBounds(x, y, size, width, height, style,
scale);
}
/**
* Returns the bounds for a label for the given location and size, taking
* into account the alignment and spacing in the specified style, as well as
* the width and height of the rectangle that contains the label. (For edge
* labels this width and height is 0.) The scale is used to scale the given
* size and the spacings in the specified style.
*/
public static mxRectangle getScaledLabelBounds(double x, double y,
mxRectangle size, double outerWidth, double outerHeight,
Map<String, Object> style, double scale)
{
double inset = mxConstants.LABEL_INSET * scale;
// Scales the size of the label
// FIXME: Correct rounded font size and not-rounded scale
double width = size.getWidth() * scale + 2 * inset;
double height = size.getHeight() * scale + 2 * inset;
// Gets the global spacing and orientation
boolean horizontal = isTrue(style, mxConstants.STYLE_HORIZONTAL, true);
int spacing = (int) (getInt(style, mxConstants.STYLE_SPACING) * scale);
// Gets the alignment settings
Object align = getString(style, mxConstants.STYLE_ALIGN,
mxConstants.ALIGN_CENTER);
Object valign = getString(style, mxConstants.STYLE_VERTICAL_ALIGN,
mxConstants.ALIGN_MIDDLE);
// Gets the vertical spacing
int top = (int) (getInt(style, mxConstants.STYLE_SPACING_TOP) * scale);
int bottom = (int) (getInt(style, mxConstants.STYLE_SPACING_BOTTOM) * scale);
// Gets the horizontal spacing
int left = (int) (getInt(style, mxConstants.STYLE_SPACING_LEFT) * scale);
int right = (int) (getInt(style, mxConstants.STYLE_SPACING_RIGHT) * scale);
// Applies the orientation to the spacings and dimension
if (!horizontal)
{
int tmp = top;
top = right;
right = bottom;
bottom = left;
left = tmp;
double tmp2 = width;
width = height;
height = tmp2;
}
// Computes the position of the label for the horizontal alignment
if ((horizontal && align.equals(mxConstants.ALIGN_CENTER))
|| (!horizontal && valign.equals(mxConstants.ALIGN_MIDDLE)))
{
x += (outerWidth - width) / 2 + left - right;
}
else if ((horizontal && align.equals(mxConstants.ALIGN_RIGHT))
|| (!horizontal && valign.equals(mxConstants.ALIGN_BOTTOM)))
{
x += outerWidth - width - spacing - right;
}
else
{
x += spacing + left;
}
// Computes the position of the label for the vertical alignment
if ((!horizontal && align.equals(mxConstants.ALIGN_CENTER))
|| (horizontal && valign.equals(mxConstants.ALIGN_MIDDLE)))
{
y += (outerHeight - height) / 2 + top - bottom;
}
else if ((!horizontal && align.equals(mxConstants.ALIGN_LEFT))
|| (horizontal && valign.equals(mxConstants.ALIGN_BOTTOM)))
{
y += outerHeight - height - spacing - bottom;
}
else
{
y += spacing + top;
}
return new mxRectangle(x, y, width, height);
}
/**
* Returns the font metrics of the static font graphics instance
* @param font The font whose metrics are to be returned
* @return the font metrics of the specified font
*/
public static FontMetrics getFontMetrics(Font font)
{
if (fontGraphics != null)
{
return fontGraphics.getFontMetrics(font);
}
return null;
}
/**
* Returns an <mxRectangle> with the size (width and height in pixels) of
* the given string.
*
* @param text
* String whose size should be returned.
* @param font
* Font to be used for the computation.
*/
public static mxRectangle getSizeForString(String text, Font font,
double scale)
{
FontRenderContext frc = new FontRenderContext(null, false, false);
font = font.deriveFont((float) (font.getSize2D() * scale));
FontMetrics metrics = null;
if (fontGraphics != null)
{
metrics = fontGraphics.getFontMetrics(font);
}
double lineHeight = mxConstants.LINESPACING;
if (metrics != null)
{
lineHeight += metrics.getHeight();
}
else
{
lineHeight += font.getSize2D() * 1.27;
}
String[] lines = text.split("\n");
Rectangle2D boundingBox = null;
if (lines.length == 0)
{
boundingBox = font.getStringBounds("", frc);
}
else
{
for (int i = 0; i < lines.length; i++)
{
Rectangle2D bounds = font.getStringBounds(lines[i], frc);
if (boundingBox == null)
{
boundingBox = bounds;
}
else
{
boundingBox
.setFrame(
0,
0,
Math.max(boundingBox.getWidth(),
bounds.getWidth()),
boundingBox.getHeight() + lineHeight);
}
}
}
return new mxRectangle(boundingBox);
}
/**
* Returns the specified text in lines that fit within the specified
* width when the specified font metrics are applied to the text
* @param text the text to wrap
* @param metrics the font metrics to calculate the text size for
* @param width the width that the text must fit within
* @return the input text split in lines that fit the specified width
*/
public static String[] wordWrap(String text, FontMetrics metrics,
double width)
{
List<String> result = new ArrayList<String>();
// First split the processing into lines already delimited by
// newlines. We want the result to retain all newlines in position.
String[] lines = text.split("\n");
for (int i = 0; i < lines.length; i++)
{
int lineWidth = 0; // the display width of the current line
int charCount = 0; // keeps count of current position in the line
StringBuilder currentLine = new StringBuilder();
// Split the words of the current line by spaces and tabs
// The words are trimmed of tabs, space and newlines, therefore
String[] words = lines[i].split("\\s+");
// Need to a form a stack of the words in reverse order
// This is because if a word is split during the process
// the remainder of the word is added to the front of the
// stack and processed next
Stack<String> wordStack = new Stack<String>();
for (int j = words.length - 1; j >= 0; j--)
{
wordStack.push(words[j]);
}
while (!wordStack.isEmpty())
{
String word = wordStack.pop();
// Work out what whitespace exists before this word.
// and add the width of the whitespace to the calculation
int whitespaceCount = 0;
if (word.length() > 0)
{
// Concatenate any preceding whitespace to the
// word and calculate the number of characters of that
// whitespace
char firstWordLetter = word.charAt(0);
int letterIndex = lines[i].indexOf(firstWordLetter,
charCount);
String whitespace = lines[i].substring(charCount,
letterIndex);
whitespaceCount = whitespace.length();
word = whitespace.concat(word);
}
double wordLength;
// If the line width is zero, we are at the start of a newline
// We don't proceed preceeding whitespace in the width
// calculation
if (lineWidth > 0)
{
wordLength = metrics.stringWidth(word);
}
else
{
wordLength = metrics.stringWidth(word.trim());
}
// Does the width of line so far plus the width of the
// current word exceed the allowed width?
if (lineWidth + wordLength > width)
{
if (lineWidth > 0)
{
// There is already at least one word on this line
// and the current word takes the overall width over
// the allowed width. Because there is something on
// the line, complete the current line, reset the width
// counter, create a new line and put the current word
// back on the stack for processing in the next round
result.add(currentLine.toString());
currentLine = new StringBuilder();
wordStack.push(word.trim());
lineWidth = 0;
}
else if (mxConstants.SPLIT_WORDS)
{
// There are no words on the current line and the
// current word does not fit on it. Find the maximum
// number of characters of this word that just fit
// in the available width
word = word.trim();
for (int j = 1; j <= word.length(); j++)
{
wordLength = metrics.stringWidth(word.substring(0,
j));
if (lineWidth + wordLength > width)
{
// The last character took us over the allowed
// width, deducted it unless there is only one
// character, in which case we have to use it
// since we can't split it...
j = j > 1 ? j - 1 : j;
String chars = word.substring(0, j);
currentLine = currentLine.append(chars);
// Return the unprocessed part of the word
// to the stack
wordStack
.push(word.substring(j, word.length()));
result.add(currentLine.toString());
currentLine = new StringBuilder();
lineWidth = 0;
// Increment char counter allowing for white
// space in the original word
charCount = charCount + chars.length()
+ whitespaceCount;
break;
}
}
}
else
{
// There are no words on the current line, but
// we are not splitting.
word = word.trim();
result.add(word);
currentLine = new StringBuilder();
lineWidth = 0;
// Increment char counter allowing for white
// space in the original word
charCount = word.length() + whitespaceCount;
}
}
else
{
// The current word does not take the total line width
// over the allowed width. Append the word, removing
// preceeding whitespace if it is the first word in the
// line.
if (lineWidth > 0)
{
currentLine = currentLine.append(word);
}
else
{
currentLine = currentLine.append(word.trim());
}
lineWidth += wordLength;
charCount += word.length();
}
}
result.add(currentLine.toString());
}
return result.toArray(new String[result.size()]);
}
/**
* Returns an mxRectangle with the size (width and height in pixels) of the
* given HTML markup.
*
* @param markup
* HTML markup whose size should be returned.
*/
public static mxRectangle getSizeForHtml(String markup,
Map<String, Object> style, double scale, double wrapWidth)
{
mxLightweightLabel textRenderer = mxLightweightLabel
.getSharedInstance();
if (textRenderer != null)
{
// First run measures size with no wrapping
textRenderer.setText(createHtmlDocument(style, markup));
Dimension size = textRenderer.getPreferredSize();
// Second run measures size with wrapping if required.
// Note that this is only required because max-width
// is not supported and we can't get the width of an
// inner HTML element (or is this possible?).
if (wrapWidth > 0)
{
textRenderer.setText(createHtmlDocument(
style,
markup,
1,
(int) Math.ceil(wrapWidth - mxConstants.LABEL_INSET * scale)));
Dimension size2 = textRenderer.getPreferredSize();
// Uses wrapped text size if any text was actually wrapped
if (size2.width < size.width)
{
size = size2;
}
}
return new mxRectangle(0, 0, size.width * scale, size.height
* scale);
}
else
{
return getSizeForString(markup, getFont(style), scale);
}
}
/**
* Function: arcToCurves
*
* Converts the given arc to a series of curves.
*/
public static double[] arcToCurves(double x0, double y0, double r1,
double r2, double angle, double largeArcFlag, double sweepFlag,
double x, double y)
{
x -= x0;
y -= y0;
if (r1 == 0 || r2 == 0)
{
return new double[0];
}
double fS = sweepFlag;
double psai = angle;
r1 = Math.abs(r1);
r2 = Math.abs(r2);
double ctx = -x / 2;
double cty = -y / 2;
double cpsi = Math.cos(psai * Math.PI / 180);
double spsi = Math.sin(psai * Math.PI / 180);
double rxd = cpsi * ctx + spsi * cty;
double ryd = -1 * spsi * ctx + cpsi * cty;
double rxdd = rxd * rxd;
double rydd = ryd * ryd;
double r1x = r1 * r1;
double r2y = r2 * r2;
double lamda = rxdd / r1x + rydd / r2y;
double sds;
if (lamda > 1)
{
r1 = Math.sqrt(lamda) * r1;
r2 = Math.sqrt(lamda) * r2;
sds = 0;
}
else
{
double seif = 1;
if (largeArcFlag == fS)
{
seif = -1;
}
sds = seif
* Math.sqrt((r1x * r2y - r1x * rydd - r2y * rxdd)
/ (r1x * rydd + r2y * rxdd));
}
double txd = sds * r1 * ryd / r2;
double tyd = -1 * sds * r2 * rxd / r1;
double tx = cpsi * txd - spsi * tyd + x / 2;
double ty = spsi * txd + cpsi * tyd + y / 2;
double rad = Math.atan2((ryd - tyd) / r2, (rxd - txd) / r1)
- Math.atan2(0, 1);
double s1 = (rad >= 0) ? rad : 2 * Math.PI + rad;
rad = Math.atan2((-ryd - tyd) / r2, (-rxd - txd) / r1)
- Math.atan2((ryd - tyd) / r2, (rxd - txd) / r1);
double dr = (rad >= 0) ? rad : 2 * Math.PI + rad;
if (fS == 0 && dr > 0)
{
dr -= 2 * Math.PI;
}
else if (fS != 0 && dr < 0)
{
dr += 2 * Math.PI;
}
double sse = dr * 2 / Math.PI;
int seg = (int) Math.ceil(sse < 0 ? -1 * sse : sse);
double segr = dr / seg;
double t = 8 / 3 * Math.sin(segr / 4) * Math.sin(segr / 4)
/ Math.sin(segr / 2);
double cpsir1 = cpsi * r1;
double cpsir2 = cpsi * r2;
double spsir1 = spsi * r1;
double spsir2 = spsi * r2;
double mc = Math.cos(s1);
double ms = Math.sin(s1);
double x2 = -t * (cpsir1 * ms + spsir2 * mc);
double y2 = -t * (spsir1 * ms - cpsir2 * mc);
double x3 = 0;
double y3 = 0;
double[] result = new double[seg * 6];
for (int n = 0; n < seg; ++n)
{
s1 += segr;
mc = Math.cos(s1);
ms = Math.sin(s1);
x3 = cpsir1 * mc - spsir2 * ms + tx;
y3 = spsir1 * mc + cpsir2 * ms + ty;
double dx = -t * (cpsir1 * ms + spsir2 * mc);
double dy = -t * (spsir1 * ms - cpsir2 * mc);
// CurveTo updates x0, y0 so need to restore it
int index = n * 6;
result[index] = x2 + x0;
result[index + 1] = y2 + y0;
result[index + 2] = x3 - dx + x0;
result[index + 3] = y3 - dy + y0;
result[index + 4] = x3 + x0;
result[index + 5] = y3 + y0;
x2 = x3 + dx;
y2 = y3 + dy;
}
return result;
}
/**
* Returns the bounding box for the rotated rectangle.
*/
public static mxRectangle getBoundingBox(mxRectangle rect, double rotation)
{
mxRectangle result = null;
if (rect != null && rotation != 0)
{
double rad = Math.toRadians(rotation);
double cos = Math.cos(rad);
double sin = Math.sin(rad);
mxPoint cx = new mxPoint(rect.getX() + rect.getWidth() / 2,
rect.getY() + rect.getHeight() / 2);
mxPoint p1 = new mxPoint(rect.getX(), rect.getY());
mxPoint p2 = new mxPoint(rect.getX() + rect.getWidth(), rect.getY());
mxPoint p3 = new mxPoint(p2.getX(), rect.getY() + rect.getHeight());
mxPoint p4 = new mxPoint(rect.getX(), p3.getY());
p1 = getRotatedPoint(p1, cos, sin, cx);
p2 = getRotatedPoint(p2, cos, sin, cx);
p3 = getRotatedPoint(p3, cos, sin, cx);
p4 = getRotatedPoint(p4, cos, sin, cx);
Rectangle tmp = new Rectangle((int) p1.getX(), (int) p1.getY(), 0,
0);
tmp.add(p2.getPoint());
tmp.add(p3.getPoint());
tmp.add(p4.getPoint());
result = new mxRectangle(tmp);
}
else if (rect != null)
{
result = (mxRectangle) rect.clone();
}
return result;
}
/**
* Find the first character matching the input character in the given
* string where the character has no letter preceding it.
*
* @param text the string to test for the presence of the input character
* @param inputChar the test character
* @param fromIndex the index position of the string to start from
* @return the position of the first character matching the input character
* in the given string where the character has no letter preceding it.
*/
public static int firstCharAt(String text, int inputChar, int fromIndex)
{
int result = 0;
while (result >= 0)
{
result = text.indexOf(inputChar, fromIndex);
if (result == 0)
{
return result;
}
else if (result > 0)
{
// Check there is a whitespace or symbol before the hit character
if (Character.isLetter(text.codePointAt(result - 1)))
{
// The pre-increment is used in if and else branches.
if (++fromIndex >= text.length())
{
return -1;
}
else
{
// Test again from next candidate character
// This isn't the first letter of this word
result = text.indexOf(inputChar, fromIndex);
}
}
else
{
return result;
}
}
}
return result;
}
/**
* Rotates the given point by the given cos and sin.
*/
public static mxPoint getRotatedPoint(mxPoint pt, double cos, double sin)
{
return getRotatedPoint(pt, cos, sin, new mxPoint());
}
/**
* Finds the index of the nearest segment on the given cell state for the
* specified coordinate pair.
*/
public static int findNearestSegment(mxCellState state, double x, double y)
{
int index = -1;
if (state.getAbsolutePointCount() > 0)
{
mxPoint last = state.getAbsolutePoint(0);
double min = Double.MAX_VALUE;
for (int i = 1; i < state.getAbsolutePointCount(); i++)
{
mxPoint current = state.getAbsolutePoint(i);
double dist = new Line2D.Double(last.x, last.y, current.x,
current.y).ptSegDistSq(x, y);
if (dist < min)
{
min = dist;
index = i - 1;
}
last = current;
}
}
return index;
}
/**
* Rotates the given point by the given cos and sin.
*/
public static mxPoint getRotatedPoint(mxPoint pt, double cos, double sin,
mxPoint c)
{
double x = pt.getX() - c.getX();
double y = pt.getY() - c.getY();
double x1 = x * cos - y * sin;
double y1 = y * cos + x * sin;
return new mxPoint(x1 + c.getX(), y1 + c.getY());
}
/**
* Returns an integer mask of the port constraints of the given map
* @param terminal the cached cell state of the cell to determine the
* port constraints for
* @param edge the edge connected to the constrained terminal
* @param source whether or not the edge specified is connected to the
* terminal specified at its source end
* @return the mask of port constraint directions
*/
public static int getPortConstraints(mxCellState terminal,
mxCellState edge, boolean source)
{
return getPortConstraints(terminal, edge, source,
mxConstants.DIRECTION_MASK_ALL);
}
/**
* Returns an integer mask of the port constraints of the given map
* @param terminal the cached cell state of the cell to determine the
* port constraints for
* @param edge the edge connected to the constrained terminal
* @param source whether or not the edge specified is connected to the
* terminal specified at its source end
* @param defaultValue Default value to return if the key is undefined.
* @return the mask of port constraint directions
*/
public static int getPortConstraints(mxCellState terminal,
mxCellState edge, boolean source, int defaultValue)
{
Object value = terminal.getStyle().get(
mxConstants.STYLE_PORT_CONSTRAINT);
if (value == null)
{
return defaultValue;
}
else
{
String directions = value.toString();
int returnValue = mxConstants.DIRECTION_MASK_NONE;
if (directions.indexOf(mxConstants.DIRECTION_NORTH) >= 0)
{
returnValue |= mxConstants.DIRECTION_MASK_NORTH;
}
if (directions.indexOf(mxConstants.DIRECTION_WEST) >= 0)
{
returnValue |= mxConstants.DIRECTION_MASK_WEST;
}
if (directions.indexOf(mxConstants.DIRECTION_SOUTH) >= 0)
{
returnValue |= mxConstants.DIRECTION_MASK_SOUTH;
}
if (directions.indexOf(mxConstants.DIRECTION_EAST) >= 0)
{
returnValue |= mxConstants.DIRECTION_MASK_EAST;
}
return returnValue;
}
}
public static int reversePortConstraints(int constraint)
{
int result = 0;
result = (constraint & mxConstants.DIRECTION_MASK_WEST) << 3;
result |= (constraint & mxConstants.DIRECTION_MASK_NORTH) << 1;
result |= (constraint & mxConstants.DIRECTION_MASK_SOUTH) >> 1;
result |= (constraint & mxConstants.DIRECTION_MASK_EAST) >> 3;
return result;
}
/**
* Draws the image inside the clip bounds to the given graphics object.
*/
public static void drawImageClip(Graphics g, BufferedImage image,
ImageObserver observer)
{
Rectangle clip = g.getClipBounds();
if (clip != null)
{
int w = image.getWidth();
int h = image.getHeight();
int x = Math.max(0, Math.min(clip.x, w));
int y = Math.max(0, Math.min(clip.y, h));
w = Math.min(clip.width, w - x);
h = Math.min(clip.height, h - y);
if (w > 0 && h > 0)
{
// TODO: Support for normal images using fast subimage copies
g.drawImage(image.getSubimage(x, y, w, h), clip.x, clip.y,
observer);
}
}
else
{
g.drawImage(image, 0, 0, observer);
}
}
/**
*
*/
public static void fillClippedRect(Graphics g, int x, int y, int width,
int height)
{
Rectangle bg = new Rectangle(x, y, width, height);
try
{
if (g.getClipBounds() != null)
{
bg = bg.intersection(g.getClipBounds());
}
}
catch (Exception e)
{
// FIXME: Getting clipbounds sometimes throws an NPE
}
g.fillRect(bg.x, bg.y, bg.width, bg.height);
}