/
GraphViz.php
877 lines (762 loc) · 24.5 KB
/
GraphViz.php
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
<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* Image_GraphViz
*
* PHP version 4 and 5
*
* Copyright (c) 2001-2007, Dr. Volker Göbbels <vmg@arachnion.de> and
* Sebastian Bergmann <sb@sebastian-bergmann.de>. All rights reserved.
*
* LICENSE: This source file is subject to version 3.0 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_0.txt. If you did not receive a copy of
* the PHP License and are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately.
*
* @category Image
* @package GraphViz
* @author Dr. Volker Göbbels <vmg@arachnion.de>
* @author Sebastian Bergmann <sb@sebastian-bergmann.de>
* @author Karsten Dambekalns <k.dambekalns@fishfarm.de>
* @author Michael Lively Jr. <mlively@ft11.net>
* @author Philippe Jausions <Philippe.Jausions@11abacus.com>
* @copyright 2001-2007 Dr. Volker Göbbels <vmg@arachnion.de> and Sebastian Bergmann <sb@sebastian-bergmann.de>
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version CVS: $Id$
* @link http://pear.php.net/package/Image_GraphViz
* @link http://www.graphviz.org/
* @since File available since Release 0.1.0
*/
/**
* Required PEAR classes
*/
require_once 'System.php';
/**
* Interface to AT&T's GraphViz tools.
*
* The GraphViz class allows for the creation of and to work with directed
* and undirected graphs and their visualization with AT&T's GraphViz tools.
*
* <code>
* <?php
* require_once 'Image/GraphViz.php';
*
* $graph = new Image_GraphViz();
*
* $graph->addNode(
* 'Node1',
* array(
* 'URL' => 'http://link1',
* 'label' => 'This is a label',
* 'shape' => 'box'
* )
* );
*
* $graph->addNode(
* 'Node2',
* array(
* 'URL' => 'http://link2',
* 'fontsize' => '14'
* )
* );
*
* $graph->addNode(
* 'Node3',
* array(
* 'URL' => 'http://link3',
* 'fontsize' => '20'
* )
* );
*
* $graph->addEdge(
* array(
* 'Node1' => 'Node2'
* ),
* array(
* 'label' => 'Edge Label'
* )
* );
*
* $graph->addEdge(
* array(
* 'Node1' => 'Node2'
* ),
* array(
* 'color' => 'red'
* )
* );
*
* $graph->image();
* ?>
* </code>
*
* @category Image
* @package GraphViz
* @author Sebastian Bergmann <sb@sebastian-bergmann.de>
* @author Dr. Volker Göbbels <vmg@arachnion.de>
* @author Karsten Dambekalns <k.dambekalns@fishfarm.de>
* @author Michael Lively Jr. <mlively@ft11.net>
* @author Philippe Jausions <Philippe.Jausions@11abacus.com>
* @copyright 2001-2007 Dr. Volker Göbbels <vmg@arachnion.de> and Sebastian Bergmann <sb@sebastian-bergmann.de>
* @license http://www.php.net/license/3_0.txt The PHP License, Version 3.0
* @version Release: @package_version@
* @link http://pear.php.net/package/Image_GraphViz
* @link http://www.graphviz.org/
* @since Class available since Release 0.1
*/
class Image_GraphViz
{
/**
* Base path to GraphViz commands
*
* @var string
*/
var $binPath = '';
/**
* Path to GraphViz/dot command
*
* @var string
*/
var $dotCommand = 'dot';
/**
* Path to GraphViz/neato command
*
* @var string
*/
var $neatoCommand = 'neato';
/**
* Representation of the graph
*
* @var array
*/
var $graph = array('edgesFrom' => array(),
'nodes' => array(),
'attributes' => array(),
'directed' => true,
'clusters' => array(),
'name' => 'G',
'strict' => true,
);
/**
* Whether to return PEAR_Error instance on failures instead of FALSE
*
* @var boolean
* @access protected
*/
var $_returnFalseOnError = true;
/**
* Constructor.
*
* Setting the name of the Graph is useful for including multiple image
* maps on one page. If not set, the graph will be named 'G'.
*
* @param boolean $directed Directed (TRUE) or undirected (FALSE) graph.
* Note: You MUST pass a boolean, and not just
* an expression that evaluates to TRUE or
* FALSE (i.e. NULL, empty string, 0 will NOT
* work)
* @param array $attributes Attributes of the graph
* @param string $name Name of the Graph
* @param boolean $strict Whether to collapse multiple edges between
* same nodes
* @param boolean $returnError Set to TRUE to return PEAR_Error instances
* on failures instead of FALSE
*
* @access public
*/
function Image_GraphViz($directed = true, $attributes = array(),
$name = 'G', $strict = true, $returnError = false)
{
$this->setDirected($directed);
$this->setAttributes($attributes);
$this->graph['name'] = $name;
$this->graph['strict'] = (boolean)$strict;
$this->_returnFalseOnError = !$returnError;
}
/**
* Outputs image of the graph in a given format
*
* This methods send HTTP headers
*
* @param string $format Format of the output image. This may be one
* of the formats supported by GraphViz.
* @param string $command "dot" or "neato"
*
* @return boolean TRUE on success, FALSE or PEAR_Error otherwise
* @access public
*/
function image($format = 'svg', $command = null)
{
$file = $this->saveParsedGraph();
if (!$file || PEAR::isError($file)) {
return $file;
}
$outputfile = $file . '.' . $format;
$rendered = $this->renderDotFile($file, $outputfile, $format,
$command);
if ($rendered !== true) {
return $rendered;
}
$sendContentLengthHeader = true;
switch (strtolower($format)) {
case 'gif':
case 'png':
case 'bmp':
case 'jpeg':
case 'tiff':
header('Content-Type: image/' . $format);
break;
case 'tif':
header('Content-Type: image/tiff');
break;
case 'jpg':
header('Content-Type: image/jpeg');
break;
case 'ico':
header('Content-Type: image/x-icon');
break;
case 'wbmp':
header('Content-Type: image/vnd.wap.wbmp');
break;
case 'pdf':
header('Content-Type: application/pdf');
break;
case 'mif':
header('Content-Type: application/vnd.mif');
break;
case 'vrml':
header('Content-Type: application/x-vrml');
break;
case 'svg':
header('Content-Type: image/svg+xml');
break;
case 'plain':
case 'plain-ext':
header('Content-Type: text/plain');
break;
default:
header('Content-Type: application/octet-stream');
$sendContentLengthHeader = false;
}
if ($sendContentLengthHeader) {
header('Content-Length: ' . filesize($outputfile));
}
$return = true;
if (readfile($outputfile) === false) {
$return = false;
}
@unlink($outputfile);
return $return;
}
/**
* Returns image (data) of the graph in a given format.
*
* @param string $format Format of the output image. This may be one
* of the formats supported by GraphViz.
* @param string $command "dot" or "neato"
*
* @return string The image (data) created by GraphViz, FALSE or PEAR_Error
* on error
* @access public
* @since Method available since Release 1.1.0
*/
function fetch($format = 'svg', $command = null)
{
$file = $this->saveParsedGraph();
if (!$file || PEAR::isError($file)) {
return $file;
}
$outputfile = $file . '.' . $format;
$rendered = $this->renderDotFile($file, $outputfile, $format,
$command);
if ($rendered !== true) {
return $rendered;
}
@unlink($file);
$fp = fopen($outputfile, 'rb');
if (!$fp) {
if ($this->_returnFalseOnError) {
return false;
}
$error = PEAR::raiseError('Could not read rendered file');
return $error;
}
$data = fread($fp, filesize($outputfile));
fclose($fp);
@unlink($outputfile);
return $data;
}
/**
* Renders a given dot file into a given format.
*
* @param string $dotfile The absolute path of the dot file to use.
* @param string $outputfile The absolute path of the file to save to.
* @param string $format Format of the output image. This may be one
* of the formats supported by GraphViz.
* @param string $command "dot" or "neato"
*
* @return boolean TRUE if the file was saved, FALSE or PEAR_Error
* otherwise.
* @access public
*/
function renderDotFile($dotfile, $outputfile, $format = 'svg',
$command = null)
{
if (!file_exists($dotfile)) {
if ($this->_returnFalseOnError) {
return false;
}
$error = PEAR::raiseError('Could not find dot file');
return $error;
}
$oldmtime = file_exists($outputfile) ? filemtime($outputfile) : 0;
switch ($command) {
case 'dot':
case 'neato':
break;
default:
$command = $this->graph['directed'] ? 'dot' : 'neato';
}
$command_orig = $command;
$command = $this->binPath.(($command == 'dot') ? $this->dotCommand
: $this->neatoCommand);
$command .= ' -T'.escapeshellarg($format)
.' -o'.escapeshellarg($outputfile)
.' '.escapeshellarg($dotfile)
.' 2>&1';
exec($command, $msg, $return_val);
clearstatcache();
if (file_exists($outputfile) && filemtime($outputfile) > $oldmtime
&& $return_val == 0) {
return true;
} elseif ($this->_returnFalseOnError) {
return false;
}
$error = PEAR::raiseError($command_orig.' command failed: '
.implode("\n", $msg));
return $error;
}
/**
* Adds a cluster to the graph.
*
* @param string $id ID.
* @param array $title Title.
* @param array $attributes Attributes of the cluster.
*
* @return void
* @access public
*/
function addCluster($id, $title, $attributes = array())
{
$this->graph['clusters'][$id]['title'] = $title;
$this->graph['clusters'][$id]['attributes'] = $attributes;
}
/**
* Adds a note to the graph.
*
* @param string $name Name of the node.
* @param array $attributes Attributes of the node.
* @param string $group Group of the node.
*
* @return void
* @access public
*/
function addNode($name, $attributes = array(), $group = 'default')
{
$this->graph['nodes'][$group][$name] = $attributes;
}
/**
* Removes a node from the graph.
*
* This method doesn't remove edges associated with the node.
*
* @param string $name Name of the node to be removed.
* @param string $group Group of the node.
*
* @return void
* @access public
*/
function removeNode($name, $group = 'default')
{
if (isset($this->graph['nodes'][$group][$name])) {
unset($this->graph['nodes'][$group][$name]);
}
}
/**
* Adds an edge to the graph.
*
* Examples:
* <code>
* $g->addEdge(array('node1' => 'node2'));
* $attr = array(
* 'label' => '+1',
* 'style' => 'dashed',
* );
* $g->addEdge(array('node3' => 'node4'), $attr);
*
* // With port specification
* $g->addEdge(array('node5' => 'node6'), $attr, array('node6' => 'portA'));
* $g->addEdge(array('node7' => 'node8'), null, array('node7' => 'portC',
* 'node8' => 'portD'));
* </code>
*
* @param array $edge Start => End node of the edge.
* @param array $attributes Attributes of the edge.
* @param array $ports Start node => port, End node => port
*
* @return integer an edge ID that can be used with {@link removeEdge()}
* @access public
*/
function addEdge($edge, $attributes = array(), $ports = array())
{
if (!is_array($edge)) {
return;
}
$from = key($edge);
$to = $edge[$from];
$info = array();
if (is_array($ports)) {
if (array_key_exists($from, $ports)) {
$info['portFrom'] = $ports[$from];
}
if (array_key_exists($to, $ports)) {
$info['portTo'] = $ports[$to];
}
}
if (is_array($attributes)) {
$info['attributes'] = $attributes;
}
if (!empty($this->graph['strict'])) {
if (!isset($this->graph['edgesFrom'][$from][$to][0])) {
$this->graph['edgesFrom'][$from][$to][0] = $info;
} else {
$this->graph['edgesFrom'][$from][$to][0] = array_merge($this->graph['edgesFrom'][$from][$to][0], $info);
}
} else {
$this->graph['edgesFrom'][$from][$to][] = $info;
}
return count($this->graph['edgesFrom'][$from][$to]) - 1;
}
/**
* Removes an edge from the graph.
*
* @param array $edge Start and End node of the edge to be removed.
* @param integer $id specific edge ID (only usefull when multiple edges
* exist between the same 2 nodes)
*
* @return void
* @access public
*/
function removeEdge($edge, $id = null)
{
if (!is_array($edge)) {
return;
}
$from = key($edge);
$to = $edge[$from];
if (!is_null($id)) {
if (isset($this->graph['edgesFrom'][$from][$to][$id])) {
unset($this->graph['edgesFrom'][$from][$to][$id]);
if (count($this->graph['edgesFrom'][$from][$to]) == 0) {
unset($this->graph['edgesFrom'][$from][$to]);
}
}
} elseif (isset($this->graph['edgesFrom'][$from][$to])) {
unset($this->graph['edgesFrom'][$from][$to]);
}
}
/**
* Adds attributes to the graph.
*
* @param array $attributes Attributes to be added to the graph.
*
* @return void
* @access public
*/
function addAttributes($attributes)
{
if (is_array($attributes)) {
$this->graph['attributes'] = array_merge($this->graph['attributes'], $attributes);
}
}
/**
* Sets attributes of the graph.
*
* @param array $attributes Attributes to be set for the graph.
*
* @return void
* @access public
*/
function setAttributes($attributes)
{
if (is_array($attributes)) {
$this->graph['attributes'] = $attributes;
}
}
/**
* Escapes an (attribute) array
*
* Detects if an attribute is <html>, contains double-quotes, etc...
*
* @param array $input input to escape
*
* @return array input escaped
* @access protected
*/
function _escapeArray($input)
{
$output = array();
foreach ((array)$input as $k => $v) {
switch ($k) {
case 'label':
case 'headlabel':
case 'taillabel':
$v = $this->_escape($v, true);
break;
default:
$v = $this->_escape($v);
$k = $this->_escape($k);
}
$output[$k] = $v;
}
return $output;
}
/**
* Returns a safe "ID" in DOT syntax
*
* @param string $input string to use as "ID"
* @param boolean $html whether to attempt detecting HTML-like content
*
* @return string
* @access protected
*/
function _escape($input, $html = false)
{
switch (strtolower($input)) {
case 'node':
case 'edge':
case 'graph':
case 'digraph':
case 'subgraph':
case 'strict':
return '"'.$input.'"';
}
if (is_bool($input)) {
return ($input) ? 'true' : 'false';
}
if ($html && (strpos($input, '</') !== false
|| strpos($input, '/>') !== false)) {
return '<'.$input.'>';
}
if (preg_match('/^([a-z_][a-z_0-9]*|-?(\.[0-9]+|[0-9]+(\.[0-9]*)?))$/i',
$input)) {
return $input;
}
return '"'.str_replace(array("\r\n", "\n", "\r", '"'),
array('\n', '\n', '\n', '\"'), $input).'"';
}
/**
* Sets directed/undirected flag for the graph.
*
* Note: You MUST pass a boolean, and not just an expression that evaluates
* to TRUE or FALSE (i.e. NULL, empty string, 0 will not work)
*
* @param boolean $directed Directed (TRUE) or undirected (FALSE) graph.
*
* @return void
* @access public
*/
function setDirected($directed)
{
if (is_bool($directed)) {
$this->graph['directed'] = $directed;
}
}
/**
* Loads a graph from a file in Image_GraphViz format
*
* @param string $file File to load graph from.
*
* @return void
* @access public
*/
function load($file)
{
if ($serializedGraph = implode('', @file($file))) {
$g = unserialize($serializedGraph);
if (!is_array($g)) {
return;
}
// Convert old storage format to new one
$defaults = array('edgesFrom' => array(),
'nodes' => array(),
'attributes' => array(),
'directed' => true,
'clusters' => array(),
'name' => 'G',
'strict' => true,
);
$this->graph = array_merge($defaults, $g);
if (isset($this->graph['edges'])) {
foreach ($this->graph['edges'] as $id => $nodes) {
$attr = (isset($this->graph['edgeAttributes'][$id]))
? $this->graph['edgeAttributes'][$id]
: array();
$this->addEdge($nodes, $attr);
}
unset($this->graph['edges']);
unset($this->graph['edgeAttributes']);
}
}
}
/**
* Save graph to file in Image_GraphViz format
*
* This saves the serialized version of the instance, not the
* rendered graph.
*
* @param string $file File to save the graph to.
*
* @return string File the graph was saved to, FALSE or PEAR_Error on
* failure.
* @access public
*/
function save($file = '')
{
$serializedGraph = serialize($this->graph);
if (empty($file)) {
$file = System::mktemp('graph_');
}
if ($fp = @fopen($file, 'wb')) {
@fputs($fp, $serializedGraph);
@fclose($fp);
return $file;
}
if ($this->_returnFalseOnError) {
return false;
}
$error = PEAR::raiseError('Could not save serialized graph instance');
return $error;
}
/**
* Parses the graph into GraphViz markup.
*
* @return string GraphViz markup
* @access public
*/
function parse()
{
$parsedGraph = (empty($this->graph['strict'])) ? '' : 'strict ';
$parsedGraph .= (empty($this->graph['directed'])) ? 'graph ' : 'digraph ';
$parsedGraph .= $this->_escape($this->graph['name'])." {\n";
$indent = ' ';
$attr = $this->_escapeArray($this->graph['attributes']);
foreach ($attr as $key => $value) {
$parsedGraph .= $indent.$key.'='.$value.";\n";
}
foreach ($this->graph['nodes'] as $group => $nodes) {
if ($group != 'default') {
$parsedGraph .= $indent.'subgraph '.$this->_escape($group)." {\n";
$indent .= ' ';
if (isset($this->graph['clusters'][$group])) {
$cluster = $this->graph['clusters'][$group];
$attr = $this->_escapeArray($cluster['attributes']);
foreach ($attr as $key => $value) {
$attr[] = $key.'='.$value;
}
if (strlen($cluster['title'])) {
$attr[] = 'label='
.$this->_escape($cluster['title'], true);
}
if ($attr) {
$parsedGraph .= $indent.'graph [ '.implode(',', $attr)
." ];\n";
}
}
}
foreach ($nodes as $node => $attributes) {
$parsedGraph .= $indent.$this->_escape($node);
$attributeList = array();
foreach ($this->_escapeArray($attributes) as $key => $value) {
$attributeList[] = $key.'='.$value;
}
if (!empty($attributeList)) {
$parsedGraph .= ' [ '.implode(',', $attributeList).' ]';
}
$parsedGraph .= ";\n";
}
if ($group != 'default') {
$indent = substr($indent, 0, -4);
$parsedGraph .= $indent."}\n";
}
}
if (!empty($this->graph['directed'])) {
$separator = ' -> ';
} else {
$separator = ' -- ';
}
foreach ($this->graph['edgesFrom'] as $from => $toNodes) {
$from = $this->_escape($from);
foreach ($toNodes as $to => $edges) {
$to = $this->_escape($to);
foreach ($edges as $info) {
$f = $from;
$t = $to;
if (array_key_exists('portFrom', $info)) {
$f .= ':'.$this->_escape($info['portFrom']);
}
if (array_key_exists('portTo', $info)) {
$t .= ':'.$this->_escape($info['portTo']);
}
$parsedGraph .= $indent.$f.$separator.$t;
if (!empty($info['attributes'])) {
$attributeList = array();
foreach ($this->_escapeArray($info['attributes']) as $key => $value) {
$attributeList[] = $key.'='.$value;
}
$parsedGraph .= ' [ '.implode(',', $attributeList).' ]';
}
$parsedGraph .= ";\n";
}
}
}
return $parsedGraph . "}\n";
}
/**
* Saves GraphViz markup to file (in DOT language)
*
* @param string $file File to write the GraphViz markup to.
*
* @return string File to which the GraphViz markup was written, FALSE or
* or PEAR_Error on failure.
* @access public
*/
function saveParsedGraph($file = '')
{
$parsedGraph = $this->parse();
if (!empty($parsedGraph)) {
if (empty($file)) {
$file = System::mktemp('graph_');
}
if ($fp = @fopen($file, 'wb')) {
@fputs($fp, $parsedGraph);
@fclose($fp);
return $file;
}
}
if ($this->_returnFalseOnError) {
return false;
}
$error = PEAR::raiseError('Could not save graph');
return $error;
}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* c-hanging-comment-ender-p: nil
* End:
*/
?>