2 rcs_id('$Id: VisualWiki.php,v 1.19 2005-10-12 06:19:31 rurban Exp $');
4 Copyright (C) 2002 Johannes Große (Johannes Große)
6 This file is part of PhpWiki.
8 PhpWiki is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 PhpWiki is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with PhpWiki; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 * Produces graphical site map of PhpWiki
25 * Example for an image map creating plugin. It produces a graphical
26 * sitemap of PhpWiki by calling the <code>dot</code> commandline tool
27 * from graphviz (http://www.graphviz.org).
28 * @author Johannes Große
31 define('VISUALWIKI_ALLOWOPTIONS', true);
32 if (!defined('VISUALWIKI_ALLOWOPTIONS'))
33 define('VISUALWIKI_ALLOWOPTIONS', false);
35 require_once "lib/plugin/GraphViz.php";
37 class WikiPlugin_VisualWiki
38 extends WikiPlugin_GraphViz
41 * Sets plugin type to map production
43 function getPluginType() {
44 return ($GLOBALS['request']->getArg('debug')) ? PLUGIN_CACHED_IMG_ONDEMAND : PLUGIN_CACHED_MAP;
48 * Sets the plugin's name to VisualWiki. It can be called by
49 * <code><?plugin VisualWiki?></code>, now. This
50 * name must correspond to the filename and the class name.
56 function getVersion() {
57 return preg_replace("/[Revision: $]/", '',
58 "\$Revision: 1.19 $");
62 * Sets textual description.
64 function getDescription() {
65 return _("Visualizes the Wiki structure in a graph using the 'dot' commandline tool from graphviz.");
69 * Returns default arguments. This is put into a separate
70 * function to allow its usage by both <code>getDefaultArguments</code>
71 * and <code>checkArguments</code>
73 function defaultarguments() {
74 return array('imgtype' => 'png',
75 'width' => false, // was 5, scale it automatically
76 'height' => false, // was 7, scale it automatically
77 'colorby' => 'age', // sort by 'age' or 'revtime'
85 'neighbour_list' => '',
94 * Sets the default arguments. WikiPlugin also regards these as
95 * the allowed arguments. Since WikiPluginCached stores an image
96 * for each different set of parameters, there can be a lot of
97 * these (large) graphs if you allow different parameters.
98 * Set <code>VISUALWIKI_ALLOWOPTIONS</code> to <code>false</code>
99 * to allow no options to be set and use only the default parameters.
100 * This will need an disk space of about 20 Kbyte all the time.
102 function getDefaultArguments() {
103 if (VISUALWIKI_ALLOWOPTIONS)
104 return $this->defaultarguments();
110 * Substitutes each forbidden parameter value by the default value
111 * defined in <code>defaultarguments</code>.
113 function checkArguments(&$arg) {
115 $def = $this->defaultarguments();
116 if (($width < 3) || ($width > 15))
117 $arg['width'] = $def['width'];
118 if (($height < 3) || ($height > 20))
119 $arg['height'] = $def['height'];
120 if (($fontsize < 8) || ($fontsize > 24))
121 $arg['fontsize'] = $def['fontsize'];
122 if (!in_array($label, array('name', 'number')))
123 $arg['label'] = $def['label'];
125 if (!in_array($shape, array('ellipse', 'box', 'point', 'circle',
127 $arg['shape'] = $def['shape'];
128 if (!in_array($colorby, array('age', 'revtime')))
129 $arg['colorby'] = $def['colorby'];
130 if (!in_array($fillnodes, array('on', 'off')))
131 $arg['fillnodes'] = $def['fillnodes'];
132 if (($large_nb < 0) || ($large_nb > 50))
133 $arg['large_nb'] = $def['large_nb'];
134 if (($recent_nb < 0) || ($recent_nb > 50))
135 $arg['recent_nb'] = $def['recent_nb'];
136 if (($refined_nb < 0 ) || ( $refined_nb > 50))
137 $arg['refined_nb'] = $def['refined_nb'];
138 if (($backlink_nb < 0) || ($backlink_nb > 50))
139 $arg['backlink_nb'] = $def['backlink_nb'];
140 // ToDo: check if "ImageCreateFrom$imgtype"() exists.
141 if (!in_array($imgtype, $GLOBALS['PLUGIN_CACHED_IMGTYPES']))
142 $arg['imgtype'] = $def['imgtype'];
143 if (empty($fontname))
144 $arg['fontname'] = VISUALWIKIFONT;
148 * Checks options, creates help page if necessary, calls both
149 * database access and image map production functions.
150 * @return array($map,$html)
152 function getMap($dbi, $argarray, $request) {
153 if (!VISUALWIKI_ALLOWOPTIONS)
154 $argarray = $this->defaultarguments();
155 $this->checkArguments($argarray);
156 $request->setArg('debug',$argarray['debug']);
157 //extract($argarray);
158 if ($argarray['help'])
159 return array($this->helpImage(), ' '); // FIXME
160 $this->createColors();
161 $this->extract_wikipages($dbi, $argarray);
162 /* ($dbi, $large, $recent, $refined, $backlink,
163 $neighbour, $excludelist, $includelist, $color); */
164 return $this->invokeDot($argarray);
165 /* => ($width, $height, $color, $shape, $text); */
169 // ------------------------------------------------------------------------------------------
172 * Returns an image containing a usage description of the plugin.
173 * @return string image handle
175 function helpImage() {
176 $def = $this->defaultarguments();
177 $other_imgtypes = $GLOBALS['PLUGIN_CACHED_IMGTYPES'];
178 unset ($other_imgtypes[$def['imgtype']]);
180 '<?plugin '.$this->getName() .
181 ' img' => ' = "' . $def['imgtype'] . "(default)|" . join('|',$GLOBALS['PLUGIN_CACHED_IMGTYPES']).'"',
182 'width' => ' = "width in inches"',
183 'height' => ' = "height in inches"',
184 'fontname' => ' = "font family"',
185 'fontsize' => ' = "fontsize in points"',
186 'colorby' => ' = "age|revtime|none"',
187 'fillnodes' => ' = "on|off"',
188 'shape' => ' = "ellipse(default)|box|circle|point"',
189 'label' => ' = "name|number"',
190 'large_nb' => ' = "number of largest pages to be selected"',
191 'recent_nb' => ' = "number of youngest pages"',
192 'refined_nb' => ' = "#pages with smallest time between revisions"',
193 'backlink_nb' => ' = "number of pages with most backlinks"',
194 'neighbour_list' => ' = "find pages linked from and to these pages"',
195 'exclude_list' => ' = "colon separated list of pages to be excluded"',
196 'include_list' => ' = "colon separated list" ?>'
199 foreach($helparr as $alignright => $alignleft) {
200 $length = max($length, strlen($alignright));
203 foreach($helparr as $alignright => $alignleft) {
204 $helptext .= substr(' '
205 . $alignright, -$length).$alignleft."\n";
207 return $this->text2img($helptext, 4, array(1, 0, 0),
208 array(255, 255, 255));
213 * Selects the first (smallest or biggest) WikiPages in
216 * @param number integer number of page names to be found
217 * @param category string attribute of the pages which is used
219 * @param minimum boolean true finds smallest, false finds biggest
220 * @return array list of page names found to be the best
222 function findbest($number, $category, $minimum ) {
223 // select the $number best in the category '$category'
224 $pages = &$this->pages;
225 $names = &$this->names;
229 foreach($names as $name) {
232 $selected[$name] = $pages[$name][$category];
234 //echo "<pre>$category "; var_dump($selected); "</pre>";
235 $compareto = $minimum ? 0x79999999 : -0x79999999;
238 foreach ($names as $name) {
242 if (($crit = $pages[$name][$category]) < $compareto) {
243 $selected[$name] = $crit;
244 asort($selected, SORT_NUMERIC);
245 array_pop($selected);
246 $compareto = end($selected);
248 } elseif (($crit = $pages[$name][$category]) > $compareto) {
249 $selected[$name] = $crit;
250 arsort($selected, SORT_NUMERIC);
251 array_pop($selected);
252 $compareto = end($selected);
255 //echo "<pre>$category "; var_dump($selected); "</pre>";
257 return array_keys($selected);
262 * Extracts a subset of all pages from the wiki and find their
263 * connections to other pages. Also collects some page features
264 * like size, age, revision number which are used to find the
265 * most attractive pages.
267 * @param dbi WikiDB database handle to access all Wiki pages
268 * @param LARGE integer number of largest pages which should
270 * @param RECENT integer number of the youngest pages to be included
271 * @param REFINED integer number of the pages with shortes revision
273 * @param BACKLINK integer number of the pages with most backlinks
274 * @param EXCLUDELIST string colon ':' separated list of page names which
275 * should not be displayed (like PhpWiki, for
277 * @param INCLUDELIST string colon separated list of pages which are
278 * always included (for example your own
280 * @param COLOR string 'age', 'revtime' or 'none'; Selects which
281 * page feature is used to determine the
282 * filling color of the nodes in the graph.
285 function extract_wikipages($dbi, $argarray) {
286 // $LARGE, $RECENT, $REFINED, $BACKLINK, $NEIGHBOUR,
287 // $EXCLUDELIST, $INCLUDELIST,$COLOR
291 // FIXME: gettextify?
292 $exclude_list = $exclude_list ? explode(':', $exclude_list) : array();
293 $include_list = $include_list ? explode(':', $include_list) : array();
294 $neighbour_list = $neighbour_list ? explode(':', $neighbour_list) : array();
296 // remove INCLUDED from EXCLUDED, includes override excludes.
297 if ($exclude_list and $include_list) {
298 $diff = array_diff($exclude_list, $include_list);
300 $exclude_list = $diff;
304 $allpages = $dbi->getAllPages(false, false, false, $exclude_list);
305 $pages = &$this->pages;
307 while ($page = $allpages->next()) {
308 $name = $page->getName();
310 // skip excluded pages
311 if (in_array($name, $exclude_list)) {
316 // false = get links from actual page
317 // true = get links to actual page ("backlinks")
318 $backlinks = $page->getLinks(true);
320 $bconnection = array();
321 while ($blink = $backlinks->next()) {
322 array_push($bconnection, $blink->getName());
327 // include all neighbours of pages listed in $NEIGHBOUR
328 if (in_array($name, $neighbour_list)) {
329 $ln = $page->getLinks(false);
331 while ($link = $ln->next()) {
332 array_push($con, $link->getName());
334 $include_list = array_merge($include_list, $bconnection, $con);
341 $rev = $page->getCurrentRevision();
343 $pages[$name] = array(
344 'age' => $now - $rev->get('mtime'),
345 'revnr' => $rev->getVersion(),
347 'backlink_nb' => count($bconnection),
348 'backlinks' => $bconnection,
349 'size' => 1000 // FIXME
351 $pages[$name]['revtime'] = $pages[$name]['age'] / ($pages[$name]['revnr']);
357 $this->names = array_keys($pages);
359 $countpages = count($pages);
361 // now select each page matching to given parameters
362 $all_selected = array_unique(array_merge(
363 $this->findbest($recent_nb, 'age', true),
364 $this->findbest($refined_nb, 'revtime', true),
365 $x = $this->findbest($backlink_nb, 'backlink_nb', false),
366 // $this->findbest($large_nb, 'size', false),
369 foreach($all_selected as $name)
370 if (isset($pages[$name]))
371 $newpages[$name] = $pages[$name];
374 $this->pages = $newpages;
375 $pages = &$this->pages;
376 $this->names = array_keys($pages);
378 unset($all_selected);
380 $countpages = count($pages);
382 // remove dead links and collect links
384 while( list($name, $page) = each($pages) ) {
385 if (is_array($page['backlinks'])) {
386 reset($page['backlinks']);
387 while ( list($index, $link) = each( $page['backlinks'] ) ) {
388 if ( !isset($pages[$link]) || $link == $name ) {
389 unset($pages[$name]['backlinks'][$index]);
391 array_push($pages[$link]['links'],$name);
392 //array_push($this->everylink, array($link,$name));
398 if ($colorby == 'none')
400 list($oldestname) = $this->findbest(1, $colorby, false);
401 $this->oldest = $pages[$oldestname][$colorby];
402 foreach($this->names as $name)
403 $pages[$name]['color'] = $this->getColor($pages[$name][$colorby] / $this->oldest);
407 * Creates the text file description of the graph needed to invoke
410 * @param filename string name of the dot file to be created
411 * @param width float width of the output graph in inches
412 * @param height float height of the graph in inches
413 * @param colorby string color sceme beeing used ('age', 'revtime',
415 * @param shape string node shape; 'ellipse', 'box', 'circle', 'point'
416 * @param label string 'name': label by name,
417 * 'number': label by unique number
418 * @return boolean error status; true=ok; false=error
420 function createDotFile($filename, $argarray) {
422 if (!$fp = fopen($filename, 'w'))
425 $fillstring = ($fillnodes == 'on') ? 'style=filled,' : '';
428 $names = &$this->names;
429 $pages = &$this->pages;
431 $nametonumber = array_flip($names);
433 $dot = "digraph VisualWiki {\n" // }
434 . (!empty($fontpath) ? " fontpath=\"$fontpath\"\n" : "");
435 if ($width and $height)
436 $dot .= " size=\"$width,$height\";\n ";
441 $dot .= "edge [arrowhead=none];\nnode [shape=$shape,fontname=$fontname,width=0.15,height=0.15,fontsize=$fontsize];\n";
444 $dot .= "node [shape=$shape,fontname=$fontname,width=0.4,height=0.4,fontsize=$fontsize];\n";
447 $dot .= "node [shape=$shape,fontname=$fontname,width=0.25,height=0.25,fontsize=$fontsize];\n";
450 $dot .= "node [fontname=$fontname,shape=$shape,fontsize=$fontsize];\n" ;
454 foreach ($names as $name) {
456 $url = rawurlencode($name);
457 // patch to allow Page/SubPage
458 $url = str_replace(urlencode(SUBPAGE_SEPARATOR), SUBPAGE_SEPARATOR, $url);
459 $nodename = ($label != 'name' ? $nametonumber[$name] + 1 : $name);
461 $dot .= " \"$nodename\" [URL=\"$url\"";
462 if ($colorby != 'none') {
463 $col = $pages[$name]['color'];
464 $dot .= sprintf(',%scolor="#%02X%02X%02X"', $fillstring,
465 $col[0], $col[1], $col[2]);
469 if (!empty($pages[$name]['links'])) {
471 if ($label != 'name')
472 foreach($pages[$name]['links'] as $linkname)
473 $linkarray[] = $nametonumber[$linkname] + 1;
475 $linkarray = $pages[$name]['links'];
476 $linkstring = join('"; "', $linkarray );
478 $c = count($pages[$name]['links']);
479 $dot .= " \"$nodename\" -> "
486 if ($colorby != 'none') {
487 $dot .= "\n subgraph cluster_legend {\n"
488 . " node[fontname=$fontname,shape=box,width=0.4,height=0.4,fontsize=$fontsize];\n"
489 . " fillcolor=lightgrey;\n"
491 . " fontname=$fontname;\n"
492 . " fontsize=$fontsize;\n"
493 . " label=\"".gettext("Legend")."\";\n";
494 $oldest= ceil($this->oldest / (24 * 3600));
497 for($i = 0; $i < $max; $i++) {
498 $time = floor($i / $max * $oldest);
499 $name = '"' . $time .' '. _("days") .'"';
500 $col = $this->getColor($i/$max);
501 $dot .= sprintf(' %s [%scolor="#%02X%02X%02X"];',
502 $name, $fillstring, $col[0], $col[1], $col[2])
506 $dot .= ' '. join(' -> ', $legend)
512 $this->source = $dot;
514 $ok = fwrite($fp, $dot);
515 $ok = fclose($fp) && $ok; // close anyway
522 * static workaround on broken Cache or broken dot executable,
523 * called only if debug=static.
526 * @param url string url pointing to the image part of the map
527 * @param map string <area> tags defining active
529 * @param dbi WikiDB database abstraction class
530 * @param argarray array complete (!) arguments to produce
531 * image. It is not necessary to call
532 * WikiPlugin->getArgs anymore.
533 * @param request Request ???
534 * @return string html output
536 function embedImg($url,&$dbi,$argarray,&$request) {
537 if (!VISUALWIKI_ALLOWOPTIONS)
538 $argarray = $this->defaultarguments();
539 $this->checkArguments($argarray);
540 //extract($argarray);
541 if ($argarray['help'])
542 return array($this->helpImage(), ' '); // FIXME
543 $this->createColors();
544 $this->extract_wikipages($dbi, $argarray);
545 list($imagehandle, $content['html']) = $this->invokeDot($argarray);
546 // write to uploads and produce static url
547 $file_dir = defined('PHPWIKI_DIR') ?
548 PHPWIKI_DIR . "/uploads" : "uploads";
549 $upload_dir = SERVER_URL . ((substr(DATA_PATH,0,1)=='/') ? '' : "/") . DATA_PATH . '/uploads/';
550 $tmpfile = tempnam($file_dir,"VisualWiki").".".$argarray['imgtype'];
551 WikiPluginCached::writeImage($argarray['imgtype'], $imagehandle, $tmpfile);
552 ImageDestroy($imagehandle);
553 return WikiPluginCached::embedMap(1,$upload_dir.basename($tmpfile),$content['html'],
554 $dbi,$argarray,$request);
558 * Prepares some rainbow colors for the nodes of the graph
559 * and stores them in an array which may be accessed with
560 * <code>getColor</code>.
562 function createColors() {
563 $predefcolors = array(
564 array('red' => 255, 'green' => 0, 'blue' => 0),
565 array('red' => 255, 'green' => 255, 'blue' => 0),
566 array('red' => 0, 'green' => 255, 'blue' => 0),
567 array('red' => 0, 'green' => 255, 'blue' => 255),
568 array('red' => 0, 'green' => 0, 'blue' => 255),
569 array('red' => 100, 'green' => 100, 'blue' => 100)
573 $numberofcolors = count($predefcolors) * $steps;
576 foreach($predefcolors as $color) {
582 for ($i = 0; $i < $steps; $i++)
583 $this->ColorTab[++$promille / $numberofcolors * 1000] = array(
584 floor(interpolate( $oldcolor['red'], $color['red'], $i/$steps )),
585 floor(interpolate( $oldcolor['green'], $color['green'], $i/$steps )),
586 floor(interpolate( $oldcolor['blue'], $color['blue'], $i/$steps ))
590 //echo"<pre>"; var_dump($this->ColorTab); echo "</pre>";
594 * Translates a value from 0.0 to 1.0 into rainbow color.
595 * red -> orange -> green -> blue -> gray
597 * @param promille float value between 0.0 and 1.0
598 * @return array(red,green,blue)
600 function getColor($promille) {
601 foreach( $this->ColorTab as $pro => $col ) {
602 if ($promille*1000 < $pro)
605 $lastcol = end($this->ColorTab);
611 * Linear interpolates a value between two point a and b
613 * @return float interpolated value
615 function interpolate($a, $b, $pos) {
616 return $a + ($b - $a) * $pos;
619 // $Log: not supported by cvs2svn $
620 // Revision 1.18 2004/12/17 16:49:52 rurban
621 // avoid Invalid username message on Sign In button click
623 // Revision 1.17 2004/10/14 19:19:34 rurban
624 // loadsave: check if the dumped file will be accessible from outside.
625 // and some other minor fixes. (cvsclient native not yet ready)
627 // Revision 1.16 2004/10/12 15:34:47 rurban
628 // redirect stderr to display the failing msg
630 // Revision 1.15 2004/09/08 13:38:00 rurban
631 // improve loadfile stability by using markup=2 as default for undefined markup-style.
632 // use more refs for huge objects.
633 // fix debug=static issue in WikiPluginCached
635 // Revision 1.14 2004/09/07 13:26:31 rurban
636 // new WikiPluginCached option debug=static and some more sf.net defaults for VisualWiki
638 // Revision 1.13 2004/09/06 12:13:00 rurban
639 // provide sf.net default dotbin
641 // Revision 1.12 2004/09/06 12:08:50 rurban
642 // memory_limit on unix workaround
643 // VisualWiki: default autosize image
645 // Revision 1.11 2004/09/06 10:10:27 rurban
646 // fixed syntax error
648 // Revision 1.10 2004/06/19 10:06:38 rurban
649 // Moved lib/plugincache-config.php to config/*.ini
650 // use PLUGIN_CACHED_* constants instead of global $CacheParams
652 // Revision 1.9 2004/06/03 09:40:57 rurban
653 // WikiPluginCache improvements
655 // Revision 1.8 2004/01/26 09:18:00 rurban
656 // * changed stored pref representation as before.
657 // the array of objects is 1) bigger and 2)
658 // less portable. If we would import packed pref
659 // objects and the object definition was changed, PHP would fail.
660 // This doesn't happen with an simple array of non-default values.
661 // * use $prefs->retrieve and $prefs->store methods, where retrieve
662 // understands the interim format of array of objects also.
663 // * simplified $prefs->get() and fixed $prefs->set()
664 // * added $user->_userid and class '_WikiUser' portability functions
665 // * fixed $user object ->_level upgrading, mostly using sessions.
666 // this fixes yesterdays problems with loosing authorization level.
667 // * fixed WikiUserNew::checkPass to return the _level
668 // * fixed WikiUserNew::isSignedIn
669 // * added explodePageList to class PageList, support sortby arg
670 // * fixed UserPreferences for WikiUserNew
671 // * fixed WikiPlugin for empty defaults array
672 // * UnfoldSubpages: added pagename arg, renamed pages arg,
673 // removed sort arg, support sortby arg
675 // Revision 1.7 2003/03/03 13:57:31 carstenklapp
676 // Added fontpath (see PhpWiki:VisualWiki), tries to be smart about which OS.
677 // (This plugin still doesn't work for me on OS X, but at least image files
678 // are actually being created now in '/tmp/cache'.)
680 // Revision 1.6 2003/01/18 22:11:45 carstenklapp
682 // Reformatting & tabs to spaces;
683 // Added copyleft, getVersion, getDescription, rcs_id.
690 // c-hanging-comment-ender-p: nil
691 // indent-tabs-mode: nil