1 <?php rcs_id('$Id: CachedMarkup.php,v 1.5 2003-03-07 21:46:55 dairiki Exp $');
2 /* Copyright (C) 2002, Geoffrey T. Dairiki <dairiki@dairiki.org>
4 * This file is part of PhpWiki.
6 * PhpWiki is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * PhpWiki is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with PhpWiki; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 class CacheableMarkup extends XmlContent {
23 function CacheableMarkup($content, $basepage) {
24 $this->_basepage = $basepage;
26 $this->_content = array();
27 $this->_append($content);
29 $this->_content[] = $this->_buf;
34 if (function_exists('gzcompress'))
35 return gzcompress(serialize($this), 9);
36 return serialize($this);
38 // FIXME: probably should implement some sort of "compression"
39 // when no gzcompress is available.
42 function unpack($packed) {
46 if (function_exists('gzcompress')) {
47 // ZLIB format has a five bit checksum in it's header.
48 // Lets check for sanity.
49 if ((ord($packed[0]) * 256 + ord($packed[1])) % 31 == 0) {
51 return unserialize(gzuncompress($packed));
54 if (substr($packed,0,2) == "O:") {
55 // Looks like a serialized object
56 return unserialize($packed);
58 trigger_error("Can't unpack bad cached markup", E_USER_WARNING);
62 /** Get names of wikipages linked to.
65 * A list of wiki page names (strings).
67 function getWikiPageLinks() {
69 foreach ($this->_content as $link) {
70 if (! isa($link, 'Cached_WikiLink'))
72 if (($pagename = $link->getPagename($this->_basepage)))
73 $links[$pagename] = 1;
75 return array_keys($links);
80 * This is here to support the XML-RPC listLinks() method.
83 * Returns an array of hashes.
85 function getLinkInfo() {
87 foreach ($this->_content as $link) {
88 if (! isa($link, 'Cached_Link'))
90 $info = $link->getLinkInfo($this->_basepage);
91 $links[$info->href] = $info;
93 return array_values($links);
96 function _append($item) {
97 if (is_array($item)) {
98 foreach ($item as $subitem)
99 $this->_append($subitem);
101 elseif (!is_object($item)) {
102 $this->_buf .= $this->_quote((string) $item);
104 elseif (isa($item, 'Cached_DynamicContent')) {
106 $this->_content[] = $this->_buf;
109 $this->_content[] = $item;
111 elseif (isa($item, 'XmlElement')) {
112 if ($item->isEmpty()) {
113 $this->_buf .= $item->emptyTag();
116 $this->_buf .= $item->startTag();
117 foreach ($item->getContent() as $subitem)
118 $this->_append($subitem);
119 $this->_buf .= "</$item->_tag>";
121 if (!isset($this->_description) and $item->getTag() == 'p')
122 $this->_glean_description($item->asString());
124 if (!$item->isInlineElement())
127 elseif (isa($item, 'XmlContent')) {
128 foreach ($item->getContent() as $item)
129 $this->_append($item);
131 elseif (method_exists($item, 'asxml')) {
132 $this->_buf .= $item->asXML();
134 elseif (method_exists($item, 'asstring')) {
135 $this->_buf .= $this->_quote($item->asString());
138 $this->_buf .= sprintf("==Object(%s)==", get_class($item));
142 function _glean_description($text) {
143 static $two_sentences;
144 if (!$two_sentences) {
145 $two_sentences = pcre_fix_posix_classes("[.?!][\")]*\s+[\"(]*[[:upper:])]"
147 . "[.?!][\")]*\s*[\"(]*([[:upper:])]|$)");
150 if (!isset($this->_description) and preg_match("/$two_sentences/sx", $text))
151 $this->_description = preg_replace("/\s*\n\s*/", " ", trim($text));
155 * Guess a short description of the page.
159 * This algorithm was suggested on MeatballWiki by
160 * Alex Schroeder <kensanata@yahoo.com>.
162 * Use the first paragraph in the page which contains at least two
165 * @see http://www.usemod.com/cgi-bin/mb.pl?MeatballWikiSuggestions
169 function getDescription () {
170 return isset($this->_description) ? $this->_description : '';
175 $basepage = $this->_basepage;
177 foreach ($this->_content as $item) {
178 if (is_string($item)) {
181 elseif (is_subclass_of($item, 'cached_dynamiccontent')) {
182 $val = $item->expand($basepage);
183 $xml .= $val->asXML();
186 $xml .= $item->asXML();
192 function printXML () {
193 $basepage = $this->_basepage;
195 foreach ($this->_content as $item) {
196 if (is_string($item)) {
199 elseif (is_subclass_of($item, 'cached_dynamiccontent')) {
200 $val = $item->expand($basepage);
211 * The base class for all dynamic content.
213 * Dynamic content is anything that can change even when the original
214 * wiki-text from which it was parsed is unchanged.
216 class Cached_DynamicContent {
218 function cache(&$cache) {
222 function expand($basepage) {
223 trigger_error("Pure virtual", E_USER_ERROR);
227 class XmlRpc_LinkInfo {
228 function XmlRpc_LinkInfo($page, $type, $href) {
235 class Cached_Link extends Cached_DynamicContent {
237 function isInlineElement() {
241 /** Get link info (for XML-RPC support)
243 * This is here to support the XML-RPC listLinks method.
244 * (See http://www.ecyrd.com/JSPWiki/Wiki.jsp?page=WikiRPCInterface)
246 function getLinkInfo($basepage) {
247 return new XmlRpc_LinkInfo($this->_getName($basepage),
249 $this->_getURL($basepage));
252 function _getURL($basepage) {
257 class Cached_WikiLink extends Cached_Link {
259 function Cached_WikiLink ($page, $label = false, $anchor = false) {
260 $this->_page = $page;
262 $this->_anchor = $anchor;
263 if ($label and $label != $page)
264 $this->_label = $label;
267 function _getType() {
271 function getPagename($basepage) {
272 $page = new WikiPageName($this->_page, $basepage);
276 function _getName($basepage) {
277 return $this->getPagename($basepage);
280 function _getURL($basepage) {
281 return WikiURL($this->getPagename($basepage), false, 'abs_url');
284 function expand($basepage) {
285 $label = isset($this->_label) ? $this->_label : false;
286 $anchor = isset($this->_anchor) ? (string)$this->_anchor : '';
287 $page = new WikiPageName($this->_page, $basepage, $anchor);
288 return WikiLink($page, 'auto', $label);
291 function asString() {
292 if (isset($this->_label))
293 return $this->_label;
298 class Cached_WikiLinkIfKnown extends Cached_WikiLink
300 function Cached_WikiLinkIfKnown ($moniker) {
301 $this->_page = $moniker;
304 function expand($basepage) {
305 return WikiLink($this->_page, 'if_known');
309 class Cached_PhpwikiURL extends Cached_DynamicContent
311 function Cached_PhpwikiURL ($url, $label) {
314 $this->_label = $label;
317 function isInlineElement() {
321 function expand($basepage) {
322 $label = isset($this->_label) ? $this->_label : false;
323 return LinkPhpwikiURL($this->_url, $label, $basepage);
326 function asString() {
327 if (isset($this->_label))
328 return $this->_label;
333 class Cached_ExternalLink extends Cached_Link {
335 function Cached_ExternalLink($url, $label=false) {
337 if ($label && $label != $url)
338 $this->_label = $label;
341 function _getType() {
345 function _getName($basepage) {
346 $label = isset($this->_label) ? $this->_label : false;
347 return ($label and is_string($label)) ? $label : $this->_url;
350 function expand($basepage) {
351 $label = isset($this->_label) ? $this->_label : false;
352 return LinkURL($this->_url, $label);
355 function asString() {
356 if (isset($this->_label))
357 return $this->_label;
362 class Cached_InterwikiLink extends Cached_ExternalLink {
364 function Cached_InterwikiLink($link, $label=false) {
365 $this->_link = $link;
367 $this->_label = $label;
370 function _getName($basepage) {
371 $label = isset($this->_label) ? $this->_label : false;
372 return ($label and is_string($label)) ? $label : $link;
375 function _getURL($basepage) {
376 $link = $this->expand($basepage);
377 return $link->getAttr('href');
380 function expand($basepage) {
381 include_once('lib/interwiki.php');
382 $intermap = InterWikiMap::GetMap($GLOBALS['request']);
383 $label = isset($this->_label) ? $this->_label : false;
384 return $intermap->link($this->_link, $label);
387 function asString() {
388 if (isset($this->_label))
389 return $this->_label;
396 class Cached_PluginInvocation extends Cached_DynamicContent {
397 function Cached_PluginInvocation ($pi) {
401 function setTightness($top, $bottom) {
402 $this->_tightenable = 0;
403 if ($top) $this->_tightenable |= 1;
404 if ($bottom) $this->_tightenable |= 2;
407 function isInlineElement() {
411 function expand($basepage) {
412 static $loader = false;
415 include_once('lib/WikiPlugin.php');
416 $loader = new WikiPluginLoader;
419 $xml = HTML::div(array('class' => 'plugin'),
420 $loader->expandPI($this->_pi, $GLOBALS['request'], $basepage));
422 if (isset($this->_tightenable)) {
423 $xml->setInClass('tightenable');
424 $xml->setInClass('top', ($this->_tightenable & 1) != 0);
425 $xml->setInClass('bottom', ($this->_tightenable & 2) != 0);
431 function asString() {
436 // (c-file-style: "gnu")
441 // c-hanging-comment-ender-p: nil
442 // indent-tabs-mode: nil