*/ // must be run within Dokuwiki if(!defined('DOKU_INC')) die(); if (!defined('DOKU_LF')) define('DOKU_LF', "\n"); if (!defined('DOKU_TAB')) define('DOKU_TAB', "\t"); if (!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/'); require_once(DOKU_PLUGIN.'syntax.php'); class syntax_plugin_cloud extends DokuWiki_Syntax_Plugin { function getInfo() { return array( 'author' => 'Gina Häußge, Michael Klier, Esther Brunner', 'email' => 'dokuwiki@chimeric.de', 'date' => '2008-07-10', 'name' => 'Cloud Plugin', 'desc' => 'displays the most used words in a word cloud', 'url' => 'http://wiki.splitbrain.org/plugin:cloud', ); } function getType() { return 'substition'; } function getPType() { return 'block'; } function getSort() { return 98; } function connectTo($mode) { $this->Lexer->addSpecialPattern('~~\w*?CLOUD.*?~~', $mode, 'plugin_cloud'); } function handle($match, $state, $pos, &$handler) { $match = substr($match, 2, -2); // strip markup if (substr($match, 0, 3) == 'TAG') $type = 'tag'; else $type = 'word'; list($junk, $num) = explode(':', $match, 2); if (!is_numeric($num)) $num = 50; $wordexprs = explode(' ', $match); $excludes = array(); foreach ($wordexprs as $wordexpr) { $matches = array(); if (preg_match('/-(.*)$/', $wordexpr, &$matches)) { $excludes[] = $matches[1]; } } return array($type, $num, $excludes); } function render($mode, &$renderer, $data) { global $conf; list($type, $num, $excludes) = $data; if ($mode == 'xhtml') { if ($type == 'tag') { // we need the tag helper plugin if (plugin_isdisabled('tag') || (!$tag = plugin_load('helper', 'tag'))) { msg('The Tag Plugin must be installed to display tag clouds.', -1); return false; } $cloud = $this->_getTagCloud($num, $min, $max, $tag, $excludes); } else { $cloud = $this->_getWordCloud($num, $min, $max, $excludes); } if (!is_array($cloud) || empty($cloud)) return false; $delta = ($max-$min)/16; // prevent caching to ensure the included pages are always fresh $renderer->info['cache'] = false; // and render the cloud $renderer->doc .= '

'.DOKU_LF; foreach ($cloud as $word => $size) { if ($size < $min+round($delta)) $class = 'cloud1'; elseif ($size < $min+round(2*$delta)) $class = 'cloud2'; elseif ($size < $min+round(4*$delta)) $class = 'cloud3'; elseif ($size < $min+round(8*$delta)) $class = 'cloud4'; else $class = 'cloud5'; if ($type == 'tag') { $id = $word; resolve_pageID($tag->namespace, $id, $exists); if($exists) { $link = wl($id); } else { $link = wl($id, array('do'=>'showtag', 'tag'=>noNS($id))); } $title = $id; $class .= ($exists ? '_tag1' : '_tag2'); } else { if($conf['userewrite'] == 2) { $link = wl($word, array('do'=>'search', 'id'=>$word)); $title = $size; } else { $link = wl($word, 'do=search'); $title = $size; } } $renderer->doc .= DOKU_TAB.''.$word.''.DOKU_LF; } $renderer->doc .= '

'.DOKU_LF; return true; } return false; } /** * Returns the sorted word cloud array */ function _getWordCloud($num, &$min, &$max, $excludes) { global $conf; $stopwords = $excludes; // load stopwords $swfile = DOKU_INC.'inc/lang/'.$conf['lang'].'/stopwords.txt'; if (@file_exists($swfile)) $stopwords = array_merge($stopwords, file($swfile)); // load extra local stopwords $swfile = DOKU_CONF.'stopwords.txt'; if (@file_exists($swfile)) $stopwords = array_merge($stopwords, file($swfile)); $cloud = array(); if (@file_exists($conf['indexdir'].'/page.idx')) { // new word-lenght based index require_once(DOKU_INC.'inc/indexer.php'); $n = 2; // minimum word length $lengths = idx_indexLengths($n); foreach ($lengths as $len) { $idx = idx_getIndex('i', $len); $word_idx = idx_getIndex('w', $len); $this->_addWordsToCloud($cloud, $idx, $word_idx, $stopwords); } } else { // old index $idx = file($conf['cachedir'].'/index.idx'); $word_idx = file($conf['cachedir'].'/word.idx'); $this->_addWordsToCloud($cloud, $idx, $word_idx, $stopwords); } return $this->_sortCloud($cloud, $num, $min, $max); } /** * Adds all words in given index as $word => $freq to $cloud array */ function _addWordsToCloud(&$cloud, $idx, $word_idx, &$stopwords) { $wcount = count($word_idx); // collect the frequency of the words for ($i = 0; $i < $wcount; $i++) { $key = trim($word_idx[$i]); if (!is_int(array_search("$key\n", $stopwords)) && (!in_array($key,$stopwords))) { $value = explode(':', $idx[$i]); if (!trim($value[0])) continue; $cloud[$key] = count($value); } } } /** * Returns the sorted tag cloud array */ function _getTagCloud($num, &$min, &$max, &$tag, $excludes) { $cloud = array(); foreach ($tag->topic_idx as $key => $value) { if (!is_array($value) || empty($value) || (!trim($value[0])) || in_array($key,$excludes) ) continue; $cloud[$key] = count($value); } return $this->_sortCloud($cloud, $num, $min, $max); } /** * Sorts and slices the cloud */ function _sortCloud($cloud, $num, &$min, &$max) { // sort by frequency, then alphabetically arsort($cloud); $cloud = array_chunk($cloud, $num, true); $max = current($cloud[0]); $min = end($cloud[0]); ksort($cloud[0]); return $cloud[0]; } } // vim:ts=4:sw=4:et:enc=utf-8: