1 <?php // rcs_id('$Id$');
3 * Copyright (C) 2002 Johannes Große
4 * Copyright (C) 2004,2007 Reini Urban
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 * You should set up the options in config/config.ini at Part seven:
25 * $ pear install http://pear.php.net/get/Cache
26 * This file belongs to WikiPluginCached.
29 require_once "lib/WikiPlugin.php";
30 // require_once "lib/plugincache-config.php"; // replaced by config.ini settings!
33 define('PLUGIN_CACHED_HTML', 0); // cached html (extensive calculation)
34 define('PLUGIN_CACHED_IMG_INLINE', 1); // gd images
35 define('PLUGIN_CACHED_MAP', 2); // area maps
36 define('PLUGIN_CACHED_SVG', 3); // special SVG/SVGZ object
37 define('PLUGIN_CACHED_SVG_PNG', 4); // special SVG/SVGZ object with PNG fallback
38 define('PLUGIN_CACHED_SWF', 5); // special SWF (flash) object
39 define('PLUGIN_CACHED_PDF', 6); // special PDF object (inlinable?)
40 define('PLUGIN_CACHED_PS', 7); // special PS object (inlinable?)
42 define('PLUGIN_CACHED_IMG_ONDEMAND', 64);// don't cache
43 define('PLUGIN_CACHED_STATIC', 128); // make it available via /uploads/, not via /getimg.php?id=
46 * An extension of the WikiPlugin class to allow image output and
48 * There are several abstract functions to be overloaded.
49 * Have a look at the example files
50 * <ul><li>plugin/TexToPng.php</li>
51 * <li>plugin/CacheTest.php (extremely simple example)</li>
52 * <li>plugin/RecentChangesCached.php</li>
53 * <li>plugin/VisualWiki.php</li>
54 * <li>plugin/Ploticus.php</li>
57 * @author Johannes Große, Reini Urban
59 class WikiPluginCached extends WikiPlugin
63 * Produces URL and id number from plugin arguments which later on,
64 * will allow to find a cached image or to reconstruct the complete
65 * plugin call to recreate the image.
67 * @param cache object the cache object used to store the images
68 * @param argarray array all parameters (including those set to
69 * default values) of the plugin call to be
72 * @return array(id,url)
74 * TODO: check if args is needed at all (on lost cache)
76 function genUrl($cache, $argarray) {
78 //$cacheparams = $GLOBALS['CacheParams'];
80 $plugincall = serialize( array(
81 'pluginname' => $this->getName(),
82 'arguments' => $argarray ) );
83 $id = $cache->generateId( $plugincall );
84 $plugincall_arg = rawurlencode($plugincall);
85 //$plugincall_arg = md5($plugincall);
86 // will not work if plugin has to recreate content and cache is lost
88 $url = DATA_PATH . '/getimg.php?';
89 if (($lastchar = substr($url,-1)) == '/') {
90 $url = substr($url, 0, -1);
92 if (strlen($plugincall_arg) > PLUGIN_CACHED_MAXARGLEN) {
93 // we can't send the data as URL so we just send the id
94 if (!$request->getSessionVar('imagecache'.$id)) {
95 $request->setSessionVar('imagecache'.$id, $plugincall);
97 $plugincall_arg = false; // not needed anymore
100 if ($lastchar == '?') {
101 // this indicates that a direct call of the image creation
102 // script is wished ($url is assumed to link to the script)
103 $url .= "id=$id" . ($plugincall_arg ? '&args='.$plugincall_arg : '');
105 // Not yet supported.
106 // We are supposed to use the indirect 404 ErrorDocument method
107 // ($url is assumed to be the url of the image in
108 // cache_dir and the image creation script is referred to in the
109 // ErrorDocument 404 directive.)
110 $url .= '/' . PLUGIN_CACHED_FILENAME_PREFIX . $id . '.img'
111 . ($plugincall_arg ? '?args='.$plugincall_arg : '');
113 if ($request->getArg("start_debug") and (DEBUG & _DEBUG_REMOTE))
114 $url .= "&start_debug=1";
115 return array($id, $url);
119 * Replaces the abstract run method of WikiPlugin to implement
120 * a cache check which can avoid redundant runs.
121 * <b>Do not override this method in a subclass. Instead you may
122 * rename your run method to getHtml, getImage or getMap.
123 * Have a close look on the arguments and required return values,
127 * @param dbi WikiDB database abstraction class
128 * @param argstr string plugin arguments in the call from PhpWiki
129 * @param request Request ???
130 * @param string basepage Pagename to use to interpret links [/relative] page names.
131 * @return string HTML output to be printed to browser
137 function run ($dbi, $argstr, &$request, $basepage) {
138 $cache = $this->newCache();
139 //$cacheparams = $GLOBALS['CacheParams'];
141 $sortedargs = $this->getArgs($argstr, $request);
142 if (is_array($sortedargs) )
144 $this->_args =& $sortedargs;
145 $this->_type = $this->getPluginType();
146 $this->_static = false;
147 if ($this->_type & PLUGIN_CACHED_STATIC
148 or $request->getArg('action') == 'pdf') // htmldoc doesn't grok subrequests
150 $this->_type = $this->_type & ~PLUGIN_CACHED_STATIC;
151 $this->_static = true;
154 // ---------- embed static image, no getimg.php? url -----------------
155 if (0 and $this->_static) {
156 //$content = $cache->get($id, 'imagecache');
158 if ($this->produceImage($content, $this, $dbi, $sortedargs, $request, 'html')) {
159 // save the image in uploads
160 return $this->embedImg($content['url'], $dbi, $sortedargs, $request);
162 // copy the cached image into uploads if older
167 list($id, $url) = $this->genUrl($cache, $sortedargs);
168 // ---------- don't check cache: html and img gen. -----------------
169 // override global PLUGIN_CACHED_USECACHE for a plugin
170 if ($this->getPluginType() & PLUGIN_CACHED_IMG_ONDEMAND) {
171 if ($this->_static and $this->produceImage($content, $this, $dbi, $sortedargs, $request, 'html'))
172 $url = $content['url'];
173 return $this->embedImg($url, $dbi, $sortedargs, $request);
177 $content = $cache->get($id, 'imagecache');
178 switch ($this->_type) {
179 case PLUGIN_CACHED_HTML:
180 if (!$content || !$content['html']) {
182 $content['html'] = $this->getHtml($dbi, $sortedargs, $request, $basepage);
183 if ($errortext = $this->getError()) {
184 $this->printError($errortext, 'html');
190 case PLUGIN_CACHED_IMG_INLINE:
191 if (PLUGIN_CACHED_USECACHE && (!$content || !$content['image'])) { // new
192 $do_save = $this->produceImage($content, $this, $dbi, $sortedargs, $request, 'html');
193 if ($this->_static) $url = $content['url'];
194 $content['html'] = $do_save ? $this->embedImg($url, $dbi, $sortedargs, $request) : false;
195 } elseif (!empty($content['url']) && $this->_static) { // already in cache
196 $content['html'] = $this->embedImg($content['url'], $dbi, $sortedargs, $request);
197 } elseif (!empty($content['image']) && $this->_static) { // copy from cache to upload
198 $do_save = $this->produceImage($content, $this, $dbi, $sortedargs, $request, 'html');
199 $url = $content['url'];
200 $content['html'] = $do_save ? $this->embedImg($url, $dbi, $sortedargs, $request) : false;
203 case PLUGIN_CACHED_MAP:
204 if (!$content || !$content['image'] || !$content['html'] ) {
205 $do_save = $this->produceImage($content, $this, $dbi, $sortedargs, $request, 'html');
206 if ($this->_static) $url = $content['url'];
207 $content['html'] = $do_save
208 ? $this->embedMap($id, $url, $content['html'], $dbi, $sortedargs, $request)
212 case PLUGIN_CACHED_SVG:
213 if (!$content || !$content['html'] ) {
214 $do_save = $this->produceImage($content, $this, $dbi, $sortedargs, $request, 'html');
215 if ($this->_static) $url = $content['url'];
216 $args = array(); //width+height => object args
217 if (!empty($sortedargs['width'])) $args['width'] = $sortedargs['width'];
218 if (!empty($sortedargs['height'])) $args['height'] = $sortedargs['height'];
219 $content['html'] = $do_save
220 ? $this->embedObject($url, 'image/svg+xml', $args,
221 HTML::embed(array_merge(
222 array('src'=>$url, 'type'=>'image/svg+xml'),
227 case PLUGIN_CACHED_SVG_PNG:
228 if (!$content || !$content['html'] ) {
229 $do_save_svg = $this->produceImage($content, $this, $dbi, $sortedargs, $request, 'html');
230 if ($this->_static) $url = $content['url'];
231 // hack alert! somehow we should know which argument will produce the secondary image (PNG)
233 $args[$this->pngArg()] = $content['imagetype']; // default type: PNG or GIF
234 $do_save = $this->produceImage($pngcontent, $this, $dbi, $args, $request, $content['imagetype']);
235 $args = array(); //width+height => object args
236 if (!empty($sortedargs['width'])) $args['width'] = $sortedargs['width'];
237 if (!empty($sortedargs['height'])) $args['height'] = $sortedargs['height'];
238 $content['html'] = $do_save_svg
239 ? $this->embedObject($url, 'image/svg+xml', $args,
240 $this->embedImg($pngcontent['url'], $dbi, $sortedargs, $request))
246 $content['args'] = md5($this->_pi);
247 $expire = $this->getExpire($dbi, $content['args'], $request);
248 $cache->save($id, $content, $expire, 'imagecache');
250 if ($content['html'])
251 return $content['html'];
256 /* --------------------- virtual or abstract functions ----------- */
259 * Sets the type of the plugin to html, image or map
263 * @return int determines the plugin to produce either html,
264 * an image or an image map; uses on of the
265 * following predefined values
267 * <li>PLUGIN_CACHED_HTML</li>
268 * <li>PLUGIN_CACHED_IMG_INLINE</li>
269 * <li>PLUGIN_CACHED_IMG_ONDEMAND</li>
270 * <li>PLUGIN_CACHED_MAP</li>
273 function getPluginType() {
274 return PLUGIN_CACHED_IMG_ONDEMAND;
278 * Creates an image handle from the given user arguments.
279 * This method is only called if the return value of
280 * <code>getPluginType</code> is set to
281 * PLUGIN_CACHED_IMG_INLINE or PLUGIN_CACHED_IMG_ONDEMAND.
283 * @access protected pure virtual
284 * @param dbi WikiDB database abstraction class
285 * @param argarray array complete (!) arguments to produce
286 * image. It is not necessary to call
287 * WikiPlugin->getArgs anymore.
288 * @param request Request ???
289 * @return imagehandle image handle if successful
290 * false if an error occured
292 function getImage($dbi,$argarray,$request) {
293 trigger_error('WikiPluginCached::getImage: pure virtual function in file '
294 . __FILE__ . ' line ' . __LINE__, E_USER_ERROR);
299 * Sets the life time of a cache entry in seconds.
300 * Expired entries are not used anymore.
301 * During a garbage collection each expired entry is
302 * removed. If removing all expired entries is not
303 * sufficient, the expire time is ignored and removing
304 * is determined by the last "touch" of the entry.
306 * @access protected virtual
307 * @param dbi WikiDB database abstraction class
308 * @param argarray array complete (!) arguments. It is
309 * not necessary to call
310 * WikiPlugin->getArgs anymore.
311 * @param request Request ???
312 * @return string format: '+seconds'
315 function getExpire($dbi,$argarray,$request) {
316 return '0'; // persist forever
320 * Decides the image type of an image output.
321 * Always used unless plugin type is PLUGIN_CACHED_HTML.
323 * @access protected virtual
324 * @param dbi WikiDB database abstraction class
325 * @param argarray array complete (!) arguments. It is
326 * not necessary to call
327 * WikiPlugin->getArgs anymore.
328 * @param request Request ???
329 * @return string 'png', 'jpeg' or 'gif'
331 function getImageType(&$dbi, $argarray, &$request) {
332 if (in_array($argarray['imgtype'], preg_split('/\s*:\s*/', PLUGIN_CACHED_IMGTYPES)))
333 return $argarray['imgtype'];
339 * Produces the alt text for an image.
340 * <code> <img src=... alt="getAlt(...)"> </code>
342 * @access protected virtual
343 * @param dbi WikiDB database abstraction class
344 * @param argarray array complete (!) arguments. It is
345 * not necessary to call
346 * WikiPlugin->getArgs anymore.
347 * @param request Request ???
348 * @return string "alt" description of the image
350 function getAlt($dbi,$argarray,$request) {
351 return '<?plugin '.$this->getName().' '.$this->glueArgs($argarray).'?>';
355 * Creates HTML output to be cached.
356 * This method is only called if the plugin_type is set to
357 * PLUGIN_CACHED_HTML.
359 * @access protected pure virtual
360 * @param dbi WikiDB database abstraction class
361 * @param argarray array complete (!) arguments to produce
362 * image. It is not necessary to call
363 * WikiPlugin->getArgs anymore.
364 * @param request Request ???
365 * @param string $basepage Pagename to use to interpret links [/relative] page names.
366 * @return string html to be printed in place of the plugin command
367 * false if an error occured
369 function getHtml($dbi, $argarray, $request, $basepage) {
370 trigger_error('WikiPluginCached::getHtml: pure virtual function in file '
371 . __FILE__ . ' line ' . __LINE__, E_USER_ERROR);
375 * Creates HTML output to be cached.
376 * This method is only called if the plugin_type is set to
377 * PLUGIN_CACHED_HTML.
379 * @access protected pure virtual
380 * @param dbi WikiDB database abstraction class
381 * @param argarray array complete (!) arguments to produce
382 * image. It is not necessary to call
383 * WikiPlugin->getArgs anymore.
384 * @param request Request ???
385 * @return array(html,handle) html for the map interior (to be specific,
386 * only <area;> tags defining hot spots)
387 * handle is an imagehandle to the corresponding
389 * array(false,false) if an error occured
391 function getMap($dbi, $argarray, $request) {
392 trigger_error('WikiPluginCached::getHtml: pure virtual function in file '
393 . __FILE__ . ' line ' . __LINE__, E_USER_ERROR);
396 /* --------------------- produce Html ----------------------------- */
399 * Creates an HTML map hyperlinked to the image specified
400 * by url and containing the hotspots given by map.
403 * @param id string unique id for the plugin call
404 * @param url string url pointing to the image part of the map
405 * @param map string <area> tags defining active
407 * @param dbi WikiDB database abstraction class
408 * @param argarray array complete (!) arguments to produce
409 * image. It is not necessary to call
410 * WikiPlugin->getArgs anymore.
411 * @param request Request ???
412 * @return string html output
414 function embedMap($id,$url,$map,&$dbi,$argarray,&$request) {
415 // id is not unique if the same map is produced twice
416 $key = substr($id,0,8).substr(microtime(),0,6);
417 return HTML(HTML::map(array( 'name' => $key ), $map ),
420 // 'alt' => htmlspecialchars($this->getAlt($dbi,$argarray,$request))
421 'usemap' => '#'.$key ))
426 * Creates an HTML <img> tag hyperlinking to the specified
427 * url and produces an alternative text for non-graphical
431 * @param url string url pointing to the image part of the map
432 * @param map string <area> tags defining active
434 * @param dbi WikiDB database abstraction class
435 * @param argarray array complete (!) arguments to produce
436 * image. It is not necessary to call
437 * WikiPlugin->getArgs anymore.
438 * @param request Request ???
439 * @return string html output
441 function embedImg($url, $dbi, $argarray, $request) {
442 return HTML::img( array(
444 'alt' => htmlspecialchars($this->getAlt($dbi, $argarray, $request)) ) );
449 <object type="audio/x-wav" standby="Loading Audio" data="example.wav">
450 <param name="src" value="example.wav" valuetype="data"></param>
451 <param name="autostart" value="false" valuetype="data"></param>
452 <param name="controls" value="ControlPanel" valuetype="data"></param>
453 <a href="example.wav">Example Audio File</a>
455 * See http://www.protocol7.com/svg-wiki/?EmbedingSvgInHTML
456 <object data="sample.svgz" type="image/svg+xml"
457 width="400" height="300">
458 <embed src="sample.svgz" type="image/svg+xml"
459 width="400" height="300" />
460 <p>Alternate Content like <img src="" /></p>
463 // how to handle alternate images? always provide alternate static images?
464 function embedObject($url, $type, $args = false, $params = false) {
465 if (!$args) $args = array();
466 $object = HTML::object(array_merge($args, array('src' => $url, 'type' => $type)));
468 $object->pushContent($params);
473 // --------------------------------------------------------------------------
474 // ---------------------- static member functions ---------------------------
475 // --------------------------------------------------------------------------
478 * Creates one static PEAR Cache object and returns copies afterwards.
479 * FIXME: There should be references returned
481 * @access static protected
482 * @return Cache copy of the cache object
484 function newCache() {
487 if (!is_object($staticcache)) {
488 if (!class_exists('Cache')) {
489 // uuh, pear not in include_path! should print a warning.
490 // search some possible pear paths.
491 $pearFinder = new PearFileFinder;
492 if ($lib = $pearFinder->findFile('Cache.php', 'missing_ok'))
494 else // fall back to our own copy
495 require_once('lib/pear/Cache.php');
497 $cacheparams = array();
498 foreach (explode(':','database:cache_dir:filename_prefix:highwater:lowwater'
499 .':maxlifetime:maxarglen:usecache:force_syncmap') as $key) {
500 $cacheparams[$key] = constant('PLUGIN_CACHED_'.strtoupper($key));
502 $cacheparams['imgtypes'] = preg_split('/\s*:\s*/', PLUGIN_CACHED_IMGTYPES);
503 $staticcache = new Cache(PLUGIN_CACHED_DATABASE, $cacheparams);
504 $staticcache->gc_maxlifetime = PLUGIN_CACHED_MAXLIFETIME;
506 if (! PLUGIN_CACHED_USECACHE ) {
507 $staticcache->setCaching(false);
510 return $staticcache; // FIXME: use references ?
514 * Determines whether a needed image type may is available
515 * from the GD library and gives an alternative otherwise.
517 * @access public static
518 * @param wish string one of 'png', 'gif', 'jpeg', 'jpg'
519 * @return string the image type to be used ('png', 'gif', 'jpeg')
520 * 'html' in case of an error
523 function decideImgType($wish) {
524 if ($wish=='html') return $wish;
525 if ($wish=='jpg') { $wish = 'jpeg'; }
527 $supportedtypes = array();
528 // Todo: swf, pdf, ...
535 /* // these do work but not with the ImageType bitmask
541 if (function_exists('ImageTypes')) {
542 $presenttypes = ImageTypes();
543 foreach ($imagetypes as $imgtype => $bitmask)
544 if ( $presenttypes && $bitmask )
545 array_push($supportedtypes, $imgtype);
547 foreach ($imagetypes as $imgtype => $bitmask)
548 if (function_exists("Image".$imgtype))
549 array_push($supportedtypes, $imgtype);
551 if (in_array($wish, $supportedtypes))
553 elseif (!empty($supportedtypes))
554 return reset($supportedtypes);
562 * Writes an image into a file or to the browser.
563 * Note that there is no check if the image can
566 * @access public static
567 * @param imgtype string 'png', 'gif' or 'jpeg'
568 * @param imghandle string image handle containing the image
569 * @param imgfile string file name of the image to be produced
571 * @see decideImageType
573 function writeImage($imgtype, $imghandle, $imgfile=false) {
574 if ($imgtype != 'html') {
575 $func = "Image" . strtoupper($imgtype);
577 $func($imghandle,$imgfile);
586 * Sends HTTP Header for some predefined file types.
587 * There is no parameter check.
589 * @access public static
590 * @param doctype string 'gif', 'png', 'jpeg', 'html'
593 function writeHeader($doctype) {
594 static $IMAGEHEADER = array(
595 'gif' => 'Content-type: image/gif',
596 'png' => 'Content-type: image/png',
597 'jpeg' => 'Content-type: image/jpeg',
598 'xbm' => 'Content-type: image/xbm',
599 'xpm' => 'Content-type: image/xpm',
600 'gd' => 'Content-type: image/gd',
601 'gd2' => 'Content-type: image/gd2',
602 'wbmp' => 'Content-type: image/vnd.wap.wbmp', // wireless bitmaps for PDA's and such.
603 'html' => 'Content-type: text/html' );
604 // Todo: swf, pdf, svg, svgz
605 Header($IMAGEHEADER[$doctype]);
610 * Converts argument array to a string of format option="value".
611 * This should only be used for displaying plugin options for
612 * the quoting of arguments is not safe, yet.
614 * @access public static
615 * @param argarray array contains all arguments to be converted
616 * @return string concated arguments
618 function glueArgs($argarray) {
619 if (!empty($argarray)) {
621 while (list($key,$value)=each($argarray)) {
622 $argstr .= $key. '=' . '"' . $value . '" ';
623 // FIXME: How are values quoted? Can a value contain '"'?
624 // TODO: rawurlencode(value)
626 return substr($argstr, 0, strlen($argstr)-1);
631 // ---------------------- FetchImageFromCache ------------------------------
634 * Extracts the cache entry id from the url and the plugin call
635 * parameters if available.
637 * @access private static
638 * @param id string return value. Image is stored under this id.
639 * @param plugincall string return value. Only returned if present in url.
640 * Contains all parameters to reconstruct
642 * @param cache Cache PEAR Cache object
643 * @param request Request ???
644 * @param errorformat string format which should be used to
645 * output errors ('html', 'png', 'gif', 'jpeg')
646 * @return boolean false if an error occurs, true otherwise.
647 * Param id and param plugincall are
648 * also return values.
650 function checkCall1(&$id, &$plugincall, $cache, $request, $errorformat) {
651 $id = $request->getArg('id');
652 $plugincall = rawurldecode($request->getArg('args'));
656 // This should never happen, so do not gettextify.
657 $errortext = "Neither 'args' nor 'id' given. Cannot proceed without parameters.";
658 $this->printError($errorformat, $errortext);
661 $id = $cache->generateId( $plugincall );
669 * Extracts the parameters necessary to reconstruct the plugin
670 * call needed to produce the requested image.
672 * @access static private
673 * @param plugincall string reference to serialized array containing both
674 * name and parameters of the plugin call
675 * @param request Request ???
676 * @return boolean false if an error occurs, true otherwise.
679 function checkCall2(&$plugincall, $request) {
680 // if plugincall wasn't sent by URL, it must have been
681 // stored in a session var instead and we can retreive it from there
683 if (!$plugincall=$request->getSessionVar('imagecache'.$id)) {
684 // I think this is the only error which may occur
685 // without having written bad code. So gettextify it.
686 $errortext = sprintf(
687 gettext ("There is no image creation data available to id '%s'. Please reload referring page." ),
689 $this->printError($errorformat, $errortext);
693 $plugincall = unserialize($plugincall);
699 * Creates an image or image map depending on the plugin type.
700 * @access static private
701 * @param content array reference to created array which overwrite the keys
702 * 'image', 'imagetype' and possibly 'html'
703 * @param plugin WikiPluginCached plugin which is called to create image or map
704 * @param dbi WikiDB handle to database
705 * @param argarray array Contains all arguments needed by plugin
706 * @param request Request ????
707 * @param errorformat string outputs errors in 'png', 'gif', 'jpg' or 'html'
708 * @return boolean error status; true=ok; false=error
710 function produceImage(&$content, $plugin, $dbi, $argarray, $request, $errorformat) {
711 $plugin->resetError();
712 $content['html'] = $imagehandle = false;
713 if ($plugin->getPluginType() == PLUGIN_CACHED_MAP ) {
714 list($imagehandle,$content['html']) = $plugin->getMap($dbi, $argarray, $request);
716 $imagehandle = $plugin->getImage($dbi, $argarray, $request);
719 $content['imagetype']
720 = $this->decideImgType($plugin->getImageType($dbi, $argarray, $request));
721 $errortext = $plugin->getError();
723 if (!$imagehandle||$errortext) {
725 $errortext = "'<?plugin ".$plugin->getName(). ' '
726 . $this->glueArgs($argarray)." ?>' returned no image, "
727 . " although no error was reported.";
729 $this->printError($errorformat, $errortext);
733 // image handle -> image data
734 if (!empty($this->_static)) {
735 $ext = "." . $content['imagetype'];
736 if (is_string($imagehandle) and file_exists($imagehandle)) {
737 if (preg_match("/.(\w+)$/",$imagehandle,$m)) {
741 $tmpfile = tempnam(getUploadFilePath(), PLUGIN_CACHED_FILENAME_PREFIX . $ext);
742 if (!strstr(basename($tmpfile), $ext)) {
746 $tmpfile = getUploadFilePath() . basename($tmpfile);
747 if (is_string($imagehandle) and file_exists($imagehandle)) {
748 rename($imagehandle, $tmpfile);
751 $tmpfile = $this->tempnam();
753 if (is_resource($imagehandle)) {
754 $this->writeImage($content['imagetype'], $imagehandle, $tmpfile);
755 ImageDestroy($imagehandle);
757 } elseif (is_string($imagehandle)) {
758 $content['file'] = getUploadFilePath() . basename($tmpfile);
759 $content['url'] = getUploadDataPath() . basename($tmpfile);
762 if (file_exists($tmpfile)) {
763 $fp = fopen($tmpfile,'rb');
764 $content['image'] = fread($fp, filesize($tmpfile));
766 if (!empty($this->_static)) {
767 // on static it is in "uploads/" but in wikicached also
768 $content['file'] = $tmpfile;
769 $content['url'] = getUploadDataPath() . basename($tmpfile);
773 if ($content['image'])
779 function staticUrl ($tmpfile) {
780 $content['file'] = $tmpfile;
781 $content['url'] = getUploadDataPath() . basename($tmpfile);
785 function tempnam($prefix = "") {
786 if (preg_match("/^(.+)\.(\w{2,4})$/", $prefix, $m)) {
790 $ext = isWindows()? ".tmp" : "";
792 $temp = tempnam(isWindows() ? str_replace('/', "\\", PLUGIN_CACHED_CACHE_DIR)
793 : PLUGIN_CACHED_CACHE_DIR,
794 $prefix ? $prefix : PLUGIN_CACHED_FILENAME_PREFIX);
796 if ($ext != ".tmp") unlink($temp);
797 $temp = preg_replace("/\.tmp$/", $ext, $temp);
805 * Main function for obtaining images from cache or generating on-the-fly
806 * from parameters sent by url or session vars.
808 * @access static public
809 * @param dbi WikiDB handle to database
810 * @param request Request ???
811 * @param errorformat string outputs errors in 'png', 'gif', 'jpeg' or 'html'
813 function fetchImageFromCache($dbi, $request, $errorformat='png') {
814 $cache = $this->newCache();
815 $errorformat = $this->decideImgType($errorformat);
817 if (!$this->checkCall1($id, $plugincall, $cache, $request, $errorformat)) return false;
819 $content = $cache->get($id, 'imagecache');
821 if (!empty($content['image'])) {
822 $this->writeHeader($content['imagetype']);
823 print $content['image'];
826 if (!empty($content['html'])) {
827 print $content['html'];
831 if (!empty($content['file']) && !empty($content['url']) && file_exists($content['file'])) {
832 print $this->embedImg($content['url'], $dbi, array(), $request);
836 // re-produce image. At first, we need the plugincall parameters.
837 // Cached args with matching id override given args to shorten getimg.php?id=md5
838 if (!empty($content['args']))
839 $plugincall['arguments'] = $content['args'];
840 if (!$this->checkCall2($plugincall, $request)) return false;
842 $pluginname = $plugincall['pluginname'];
843 $argarray = $plugincall['arguments'];
845 $loader = new WikiPluginLoader;
846 $plugin = $loader->getPlugin($pluginname);
848 // cache empty, but image maps have to be created _inline_
849 // so ask user to reload wiki page instead
850 if (($plugin->getPluginType() & PLUGIN_CACHED_MAP) && PLUGIN_CACHED_FORCE_SYNCMAP) {
851 $errortext = _("Image map expired. Reload wiki page to recreate its html part.");
852 $this->printError($errorformat, $errortext);
855 if (!$this->produceImage($content, $plugin, $dbi, $argarray,
856 $request, $errorformat))
859 $expire = $plugin->getExpire($dbi, $argarray, $request);
861 if ($content['image']) {
862 $cache->save($id, $content, $expire, 'imagecache');
863 $this->writeHeader($content['imagetype']);
864 print $content['image'];
868 $errortext = "Could not create image file from imagehandle.";
869 $this->printError($errorformat, $errortext);
871 } // FetchImageFromCache
873 // -------------------- error handling ----------------------------
876 * Resets buffer containing all error messages. This is allways
877 * done before invoking any abstract creation routines like
878 * <code>getImage</code>.
883 function resetError() {
884 $this->_errortext = '';
888 * Returns all accumulated error messages.
891 * @return string error messages printed with <code>complain</code>.
893 function getError() {
894 return $this->_errortext;
898 * Collects the error messages in a string for later output
899 * by WikiPluginCached. This should be used for any errors
900 * that occur during data (html,image,map) creation.
903 * @param addtext string errormessage to be printed (separate
904 * multiple lines with '\n')
907 function complain($addtext) {
908 $this->_errortext .= $addtext;
912 * Outputs the error as image if possible or as html text
913 * if wished or html header has already been sent.
915 * @access static protected
916 * @param imgtype string 'png', 'gif', 'jpeg' or 'html'
917 * @param errortext string guess what?
920 function printError($imgtype, $errortext) {
921 $imgtype = $this->decideImgType($imgtype);
923 $talkedallready = ob_get_contents() || headers_sent();
924 if (($imgtype=='html') || $talkedallready) {
925 if (is_object($errortext))
926 $errortext = $errortext->asXml();
927 trigger_error($errortext, E_USER_WARNING);
929 $red = array(255,0,0);
930 $grey = array(221,221,221);
931 if (is_object($errortext))
932 $errortext = $errortext->asString();
933 $im = $this->text2img($errortext, 2, $red, $grey);
935 trigger_error($errortext, E_USER_WARNING);
938 $this->writeHeader($imgtype);
939 $this->writeImage($imgtype, $im);
946 * Basic text to image converter for error handling which allows
947 * multiple line output.
948 * It will only output the first 25 lines of 80 characters. Both
949 * values may be smaller if the chosen font is to big for there
950 * is further restriction to 600 pixel in width and 350 in height.
952 * @access static public
953 * @param txt string multi line text to be converted
954 * @param fontnr integer number (1-5) telling gd which internal font to use;
955 * I recommend font 2 for errors and 4 for help texts.
956 * @param textcol array text color as a list of the rgb components; array(red,green,blue)
957 * @param bgcol array background color; array(red,green,blue)
958 * @return string image handle for gd routines
960 function text2img($txt,$fontnr,$textcol,$bgcol) {
961 // basic (!) output for error handling
964 if ($fontnr<1 || $fontnr>5) {
967 if (!is_array($textcol) || !is_array($bgcol)) {
968 $textcol = array(0,0,0);
969 $bgcol = array(255,255,255);
971 foreach( array_merge($textcol,$bgcol) as $component) {
972 if ($component<0 || $component > 255) {
973 $textcol = array(0,0,0);
974 $bgcol = array(255,255,255);
979 // prepare Parameters
981 // set maximum values
988 if (function_exists('ImageFontWidth')) {
989 $charx = ImageFontWidth($fontnr);
990 $chary = ImageFontHeight($fontnr);
992 $charx = 10; $chary = 10;
995 $marginy = floor($chary/2);
997 $IMAGESIZE['cols'] = min($IMAGESIZE['cols'], floor(($IMAGESIZE['width'] - 2*$marginx )/$charx));
998 $IMAGESIZE['rows'] = min($IMAGESIZE['rows'], floor(($IMAGESIZE['height'] - 2*$marginy )/$chary));
1004 $len = strlen($txt);
1005 $npos = strpos($txt, "\n");
1007 if ($npos===false) {
1008 $breaklen = min($IMAGESIZE['cols'],$len);
1010 $breaklen = min($npos+1, $IMAGESIZE['cols']);
1012 $lines[$y] = chop(substr($txt, 0, $breaklen));
1013 $wx = max($wx,strlen($lines[$y++]));
1014 $txt = substr($txt, $breaklen);
1015 } while ($txt && ($y < $IMAGESIZE['rows']));
1017 // recalculate image size
1018 $IMAGESIZE['rows'] = $y;
1019 $IMAGESIZE['cols'] = $wx;
1021 $IMAGESIZE['width'] = $IMAGESIZE['cols'] * $charx + 2*$marginx;
1022 $IMAGESIZE['height'] = $IMAGESIZE['rows'] * $chary + 2*$marginy;
1024 // create blank image
1025 $im = @ImageCreate($IMAGESIZE['width'],$IMAGESIZE['height']);
1027 $col = ImageColorAllocate($im, $textcol[0], $textcol[1], $textcol[2]);
1028 $bg = ImageColorAllocate($im, $bgcol[0], $bgcol[1], $bgcol[2]);
1030 ImageFilledRectangle($im, 0, 0, $IMAGESIZE['width']-1, $IMAGESIZE['height']-1, $bg);
1033 foreach($lines as $nr => $textstr) {
1034 ImageString( $im, $fontnr, $marginx, $marginy+$nr*$chary,
1040 function newFilterThroughCmd($input, $commandLine) {
1041 $descriptorspec = array(
1042 0 => array("pipe", "r"), // stdin is a pipe that the child will read from
1043 1 => array("pipe", "w"), // stdout is a pipe that the child will write to
1044 2 => array("pipe", "w"), // stdout is a pipe that the child will write to
1047 $process = proc_open("$commandLine", $descriptorspec, $pipes);
1048 if (is_resource($process)) {
1049 // $pipes now looks like this:
1050 // 0 => writeable handle connected to child stdin
1051 // 1 => readable handle connected to child stdout
1052 // 2 => readable handle connected to child stderr
1053 fwrite($pipes[0], $input);
1056 while(!feof($pipes[1])) {
1057 $buf .= fgets($pipes[1], 1024);
1061 while(!feof($pipes[2])) {
1062 $stderr .= fgets($pipes[2], 1024);
1065 // It is important that you close any pipes before calling
1066 // proc_close in order to avoid a deadlock
1067 $return_value = proc_close($process);
1068 if (empty($buf)) printXML($this->error($stderr));
1073 // run "echo $source | $commandLine" and return result
1074 function filterThroughCmd($source, $commandLine) {
1075 return $this->newFilterThroughCmd($source, $commandLine);
1079 * Execute system command and wait until the outfile $until exists.
1081 * @param cmd string command to be invoked
1082 * @param until string expected output filename
1083 * @return boolean error status; true=ok; false=error
1085 function execute($cmd, $until = false) {
1086 // cmd must redirect stderr to stdout though!
1087 $errstr = exec($cmd); //, $outarr, $returnval); // normally 127
1088 //$errstr = join('',$outarr);
1089 $ok = empty($errstr);
1091 trigger_error("\n".$cmd." failed: $errstr", E_USER_WARNING);
1092 } elseif ($GLOBALS['request']->getArg('debug'))
1093 trigger_error("\n".$cmd.": success\n", E_USER_NOTICE);
1097 while (!file_exists($until) and $loop > 0) {
1106 return file_exists($until);
1115 // c-basic-offset: 4
1116 // c-hanging-comment-ender-p: nil
1117 // indent-tabs-mode: nil