1 <?php rcs_id('$Id: stdlib.php,v 1.53 2001-12-06 06:24:44 carstenklapp Exp $');
4 Standard functions for Wiki functionality
5 WikiURL($pagename, $args, $abs)
6 LinkWikiWord($wikiword, $linktext)
7 LinkExistingWikiWord($wikiword, $linktext)
8 LinkUnknownWikiWord($wikiword, $linktext)
9 LinkURL($url, $linktext)
11 LinkInterWikiLink($link, $linktext)
12 CookSpaces($pagearray)
13 class Stack (push(), pop(), cnt(), top())
14 UpdateRecentChanges($dbi, $pagename, $isnewpage)
15 ParseAndLink($bracketlink)
16 ExtractWikiPageLinks($content)
17 LinkRelatedPages($dbi, $pagename)
21 function DataURL($url) {
22 if (preg_match('@^(\w+:|/)@', $url))
24 return SERVER_URL . DATA_PATH . "/$url";
27 function WikiURL($pagename, $args = '', $get_abs_url = false) {
28 if (is_array($args)) {
30 foreach ($args as $key => $val) {
31 $enc_args[] = urlencode($key) . '=' . urlencode($val);
33 $args = join('&', $enc_args);
37 $url = $get_abs_url ? SERVER_URL . VIRTUAL_PATH . "/" : '';
38 $url .= rawurlencode($pagename);
43 $url = $get_abs_url ? SERVER_URL . SCRIPT_NAME : basename(SCRIPT_NAME);
44 $url .= "?pagename=" . rawurlencode($pagename);
52 define('NO_END_TAG_PAT',
53 '/^' . join('|', array('area', 'base', 'basefont',
56 'isindex', 'link', 'meta',
59 function StartTag($tag, $args = '')
64 while (list($key, $val) = each($args))
66 if (is_string($val) || is_numeric($val))
67 $s .= sprintf(' %s="%s"', $key, htmlspecialchars($val));
69 $s .= " $key=\"$key\"";
76 function Element($tag, $args = '', $content = '')
79 if (!is_array($args)) {
83 $html = StartTag($tag, $args);
84 if (preg_match(NO_END_TAG_PAT, $tag)) {
86 return preg_replace('/>$/', " />", $html);
89 $html .= "</$tag>";//FIXME: newline might not always be desired.
94 function QElement($tag, $args = '', $content = '')
97 return Element($tag, $args, htmlspecialchars($content));
100 return Element($tag, htmlspecialchars($content));
104 function LinkURL($url, $linktext='') {
105 // FIXME: Is this needed (or sufficient?)
106 if(ereg("[<>\"]", $url)) {
107 return Element('strong',
108 QElement('u', array('class' => 'baduri'),
109 'BAD URL -- remove all of <, >, "')); //"
112 if (empty($linktext)) {
120 if (!defined('USE_LINK_ICONS')) {
122 array('href' => $url, 'class' => $class),
125 //ideally the link image would be specified by a map file
126 //similar to the interwiki.map
127 $linkproto = substr($url, 0, strrpos($url, ":"));
130 $linkimg = "/images/mailto.png";
132 $linkimg = "/images/http.png";
134 $linkimg = "/images/https.png";
136 $linkimg = "/images/ftp.png";
138 $linkimg = "/images/http.png";
141 array('href' => $url, 'class' => $class),
142 Element('img', array('src' => DATA_PATH . $linkimg, 'alt' => $linkproto)) . $linktext);
146 function LinkWikiWord($wikiword, $linktext='') {
148 if ($dbi->isWikiPage($wikiword))
149 return LinkExistingWikiWord($wikiword, $linktext);
151 return LinkUnknownWikiWord($wikiword, $linktext);
155 function LinkExistingWikiWord($wikiword, $linktext='') {
156 if (empty($linktext)) {
157 $linktext = $wikiword;
158 if (defined("autosplit_wikiwords"))
159 $linktext=split_pagename($linktext);
163 $class = 'named-wiki';
165 return QElement('a', array('href' => WikiURL($wikiword),
170 function LinkUnknownWikiWord($wikiword, $linktext='') {
171 if (empty($linktext)) {
172 $linktext = $wikiword;
173 if (defined("autosplit_wikiwords"))
174 $linktext=split_pagename($linktext);
175 $class = 'wikiunknown';
178 $class = 'named-wikiunknown';
181 return Element('span', array('class' => $class),
183 array('href' => WikiURL($wikiword, array('action' => 'edit'))),
185 . Element('u', $linktext));
188 function LinkImage($url, $alt='[External Image]') {
189 // FIXME: Is this needed (or sufficient?)
190 // As long as the src in htmlspecialchars()ed I think it's safe.
191 if(ereg('[<>"]', $url)) {
192 return Element('strong',
193 QElement('u', array('class' => 'baduri'),
194 'BAD URL -- remove all of <, >, "'));
196 return Element('img', array('src' => $url, 'alt' => $alt));
199 // converts spaces to tabs
200 function CookSpaces($pagearray) {
201 return preg_replace("/ {3,8}/", "\t", $pagearray);
206 var $items = array();
209 function push($item) {
210 $this->items[$this->size] = $item;
216 if ($this->size == 0) {
217 return false; // stack is empty
220 return $this->items[$this->size];
229 return $this->items[$this->size - 1];
235 // end class definition
238 function MakeWikiForm ($pagename, $args, $class, $button_text = '')
240 $formargs['action'] = USE_PATH_INFO ? WikiURL($pagename) : SCRIPT_NAME;
241 $formargs['method'] = 'get';
242 $formargs['class'] = $class;
247 while (list($key, $val) = each($args))
249 $a = array('name' => $key, 'value' => $val, 'type' => 'hidden');
251 if (preg_match('/^ (\d*) \( (.*) \) ((upload)?) $/xi', $val, $m))
255 $a['size'] = $m[1] ? $m[1] : 30;
260 $formargs['enctype'] = 'multipart/form-data';
261 $contents .= Element('input',
262 array('name' => 'MAX_FILE_SIZE',
263 'value' => MAX_UPLOAD_SIZE,
264 'type' => 'hidden'));
265 $formargs['method'] = 'post';
269 $contents .= Element('input', $a);
272 $row = Element('td', $contents);
274 if (!empty($button_text)) {
275 $row .= Element('td', Element('input', array('type' => 'submit',
277 'value' => $button_text)));
280 return Element('form', $formargs,
281 Element('table', array('cellspacing' => 0, 'cellpadding' => 2, 'border' => 0),
282 Element('tr', $row)));
285 function SplitQueryArgs ($query_args = '')
287 $split_args = split('&', $query_args);
289 while (list($key, $val) = each($split_args))
290 if (preg_match('/^ ([^=]+) =? (.*) /x', $val, $m))
291 $args[$m[1]] = $m[2];
295 function LinkPhpwikiURL($url, $text = '') {
298 if (!preg_match('/^ phpwiki: ([^?]*) [?]? (.*) $/x', $url, $m))
299 return Element('strong',
300 QElement('u', array('class' => 'baduri'),
301 'BAD phpwiki: URL'));
303 $pagename = urldecode($m[1]);
306 if (empty($pagename) && preg_match('/^(diff|edit|links|info)=([^&]+)$/', $qargs, $m)) {
307 // Convert old style links (to not break diff links in RecentChanges).
308 $pagename = urldecode($m[2]);
309 $args = array("action" => $m[1]);
312 $args = SplitQueryArgs($qargs);
315 if (empty($pagename))
316 $pagename = $GLOBALS['pagename'];
318 if (isset($args['action']) && $args['action'] == 'browse')
319 unset($args['action']);
321 if (empty($args['action']))
323 else if (is_safe_action($args['action']))
324 $class = 'wikiaction';
326 if (empty($args['action']) || is_safe_action($args['action']))
327 $class = 'wikiaction';
329 // Don't allow administrative links on unlocked pages.
330 // FIXME: Ugh: don't like this...
332 $page = $dbi->getPage($GLOBALS['pagename']);
333 if (!$page->get('locked'))
334 return QElement('u', array('class' => 'wikiunsafe'),
335 gettext('Lock page to enable link'));
337 $class = 'wikiadmin';
340 // FIXME: ug, don't like this
341 if (preg_match('/=\d*\(/', $qargs))
342 return MakeWikiForm($pagename, $args, $class, $text);
344 $text = htmlspecialchars($text);
346 $text = QElement('span', array('class' => 'rawurl'), $url);
348 return Element('a', array('href' => WikiURL($pagename, $args),
353 function ParseAndLink($bracketlink) {
354 global $dbi, $AllowedProtocols, $InlineImages;
355 global $InterWikiLinkRegexp;
357 // $bracketlink will start and end with brackets; in between
358 // will be either a page name, a URL or both separated by a pipe.
360 // strip brackets and leading space
361 preg_match("/(\[\s*)(.+?)(\s*\])/", $bracketlink, $match);
362 // match the contents
363 preg_match("/([^|]+)(\|)?([^|]+)?/", $match[2], $matches);
365 if (isset($matches[3])) {
366 // named link of the form "[some link name | http://blippy.com/]"
367 $URL = trim($matches[3]);
368 $linkname = trim($matches[1]);
371 // unnamed link of the form "[http://blippy.com/] or [wiki page]"
372 $URL = trim($matches[1]);
374 $linktype = 'simple';
377 if ($dbi->isWikiPage($URL)) {
378 $link['type'] = "wiki-$linktype";
379 $link['link'] = LinkExistingWikiWord($URL, $linkname);
380 } elseif (preg_match("#^($AllowedProtocols):#", $URL)) {
381 // if it's an image, embed it; otherwise, it's a regular link
382 if (preg_match("/($InlineImages)$/i", $URL)) {
383 $link['type'] = "image-$linktype";
384 $link['link'] = LinkImage($URL, $linkname);
386 $link['type'] = "url-$linktype";
387 $link['link'] = LinkURL($URL, $linkname);
390 $link['link'] = LinkURL($URL, $linkname);
394 } elseif (preg_match("#^phpwiki:(.*)#", $URL, $match)) {
395 $link['type'] = "url-wiki-$linktype";
396 $link['link'] = LinkPhpwikiURL($URL, $linkname);
397 } elseif (preg_match("#^\d+$#", $URL)) {
398 $link['type'] = "footnote-$linktype";
399 $link['link'] = $URL;
400 } elseif (function_exists('LinkInterWikiLink') &&
401 preg_match("#^$InterWikiLinkRegexp:#", $URL)) {
402 $link['type'] = "interwiki-$linktype";
403 $link['link'] = LinkInterWikiLink($URL, $linkname);
405 $link['type'] = "wiki-unknown-$linktype";
406 $link['link'] = LinkUnknownWikiWord($URL, $linkname);
413 function ExtractWikiPageLinks($content)
415 global $WikiNameRegexp;
417 if (is_string($content))
418 $content = explode("\n", $content);
420 $wikilinks = array();
421 foreach ($content as $line) {
422 // remove plugin code
423 $line = preg_replace('/<\?plugin\s+\w.*?\?>/', '', $line);
424 // remove escaped '['
425 $line = str_replace('[[', ' ', $line);
427 // bracket links (only type wiki-* is of interest)
428 $numBracketLinks = preg_match_all("/\[\s*([^\]|]+\|)?\s*(.+?)\s*\]/", $line, $brktlinks);
429 for ($i = 0; $i < $numBracketLinks; $i++) {
430 $link = ParseAndLink($brktlinks[0][$i]);
431 if (preg_match("#^wiki#", $link['type']))
432 $wikilinks[$brktlinks[2][$i]] = 1;
434 $brktlink = preg_quote($brktlinks[0][$i]);
435 $line = preg_replace("|$brktlink|", '', $line);
438 // BumpyText old-style wiki links
439 if (preg_match_all("/!?$WikiNameRegexp/", $line, $link)) {
440 for ($i = 0; isset($link[0][$i]); $i++) {
441 if($link[0][$i][0] <> '!')
442 $wikilinks[$link[0][$i]] = 1;
446 return array_keys($wikilinks);
449 function LinkRelatedPages($dbi, $pagename)
451 // currently not supported everywhere
452 if(!function_exists('GetWikiPageLinks'))
455 //FIXME: fix or toss?
456 $links = GetWikiPageLinks($dbi, $pagename);
458 $txt = QElement('strong',
459 sprintf (gettext ("%d best incoming links:"), NUM_RELATED_PAGES));
460 for($i = 0; $i < NUM_RELATED_PAGES; $i++) {
461 if(isset($links['in'][$i])) {
462 list($name, $score) = $links['in'][$i];
463 $txt .= LinkExistingWikiWord($name) . " ($score), ";
467 $txt .= "\n" . Element('br');
468 $txt .= Element('strong',
469 sprintf (gettext ("%d best outgoing links:"), NUM_RELATED_PAGES));
470 for($i = 0; $i < NUM_RELATED_PAGES; $i++) {
471 if(isset($links['out'][$i])) {
472 list($name, $score) = $links['out'][$i];
473 if($dbi->isWikiPage($name))
474 $txt .= LinkExistingWikiWord($name) . " ($score), ";
478 $txt .= "\n" . Element('br');
479 $txt .= Element('strong',
480 sprintf (gettext ("%d most popular nearby:"), NUM_RELATED_PAGES));
481 for($i = 0; $i < NUM_RELATED_PAGES; $i++) {
482 if(isset($links['popular'][$i])) {
483 list($name, $score) = $links['popular'][$i];
484 $txt .= LinkExistingWikiWord($name) . " ($score), ";
493 * Split WikiWords in page names.
495 * It has been deemed useful to split WikiWords (into "Wiki Words")
496 * in places like page titles. This is rumored to help search engines
499 * @param $page string The page name.
501 * @return string The split name.
503 function split_pagename ($page) {
505 if (preg_match("/\s/", $page))
506 return $page; // Already split --- don't split any more.
508 // FIXME: this algorithm is Anglo-centric.
511 // This mess splits between a lower-case letter followed by either an upper-case
512 // or a numeral; except that it wont split the prefixes 'Mc', 'De', or 'Di' off
514 $RE[] = '/([[:lower:]])((?<!Mc|De|Di)[[:upper:]]|\d)/';
515 // This the single-letter words 'I' and 'A' from any following capitalized words.
516 $RE[] = '/(?: |^)([AI])([[:upper:]])/';
517 // Split numerals from following letters.
518 $RE[] = '/(\d)([[:alpha:]])/';
520 foreach ($RE as $key => $val)
521 $RE[$key] = pcre_fix_posix_classes($val);
524 foreach ($RE as $regexp)
525 $page = preg_replace($regexp, '\\1 \\2', $page);
529 function NoSuchRevision ($page, $version) {
530 $html = Element('p', QElement('strong', gettext("Bad Version"))) . "\n";
531 $html .= QElement('p',
532 sprintf(gettext("I'm sorry. Version %d of %s is not in my database."),
533 $version, $page->getName())) . "\n";
535 include_once('lib/Template.php');
536 echo GeneratePage('MESSAGE', $html, gettext("Bad Version"));
541 // (c-file-style: "gnu")
546 // c-hanging-comment-ender-p: nil
547 // indent-tabs-mode: nil