diff options
Diffstat (limited to 'includes/SpecialWhatlinkshere.php')
| -rw-r--r-- | includes/SpecialWhatlinkshere.php | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/includes/SpecialWhatlinkshere.php b/includes/SpecialWhatlinkshere.php new file mode 100644 index 00000000..cedf6049 --- /dev/null +++ b/includes/SpecialWhatlinkshere.php @@ -0,0 +1,277 @@ +<?php +/** + * + * @package MediaWiki + * @subpackage SpecialPage + */ + +/** + * Entry point + * @param string $par An article name ?? + */ +function wfSpecialWhatlinkshere($par = NULL) { + global $wgRequest; + $page = new WhatLinksHerePage( $wgRequest, $par ); + $page->execute(); +} + +class WhatLinksHerePage { + var $request, $par; + var $limit, $from, $dir, $target; + var $selfTitle, $skin; + + function WhatLinksHerePage( &$request, $par = null ) { + global $wgUser; + $this->request =& $request; + $this->skin =& $wgUser->getSkin(); + $this->par = $par; + } + + function execute() { + global $wgOut; + + $this->limit = min( $this->request->getInt( 'limit', 50 ), 5000 ); + if ( $this->limit <= 0 ) { + $this->limit = 50; + } + $this->from = $this->request->getInt( 'from' ); + $this->dir = $this->request->getText( 'dir', 'next' ); + if ( $this->dir != 'prev' ) { + $this->dir = 'next'; + } + + $targetString = isset($this->par) ? $this->par : $this->request->getVal( 'target' ); + + if (is_null($targetString)) { + $wgOut->showErrorPage( 'notargettitle', 'notargettext' ); + return; + } + + $this->target = Title::newFromURL( $targetString ); + if( !$this->target ) { + $wgOut->showErrorPage( 'notargettitle', 'notargettext' ); + return; + } + $this->selfTitle = Title::makeTitleSafe( NS_SPECIAL, + 'Whatlinkshere/' . $this->target->getPrefixedDBkey() ); + $wgOut->setPagetitle( $this->target->getPrefixedText() ); + $wgOut->setSubtitle( wfMsg( 'linklistsub' ) ); + + $isredir = ' (' . wfMsg( 'isredirect' ) . ")\n"; + + $wgOut->addHTML('< '.$this->skin->makeLinkObj($this->target, '', 'redirect=no' )."<br />\n"); + + $this->showIndirectLinks( 0, $this->target, $this->limit, $this->from, $this->dir ); + } + + /** + * @param int $level Recursion level + * @param Title $target Target title + * @param int $limit Number of entries to display + * @param Title $from Display from this article ID + * @param string $dir 'next' or 'prev', whether $fromTitle is the start or end of the list + * @private + */ + function showIndirectLinks( $level, $target, $limit, $from = 0, $dir = 'next' ) { + global $wgOut; + $fname = 'WhatLinksHerePage::showIndirectLinks'; + + $dbr =& wfGetDB( DB_READ ); + + extract( $dbr->tableNames( 'pagelinks', 'templatelinks', 'page' ) ); + + // Some extra validation + $from = intval( $from ); + if ( !$from && $dir == 'prev' ) { + // Before start? No make sense + $dir = 'next'; + } + + // Make the query + $plConds = array( + 'page_id=pl_from', + 'pl_namespace' => $target->getNamespace(), + 'pl_title' => $target->getDBkey(), + ); + + $tlConds = array( + 'page_id=tl_from', + 'tl_namespace' => $target->getNamespace(), + 'tl_title' => $target->getDBkey(), + ); + + if ( $from ) { + if ( 'prev' == $dir ) { + $offsetCond = "page_id < $from"; + $options = array( 'ORDER BY page_id DESC' ); + } else { + $offsetCond = "page_id >= $from"; + $options = array( 'ORDER BY page_id' ); + } + } else { + $offsetCond = false; + $options = array( 'ORDER BY page_id,is_template DESC' ); + } + // Read an extra row as an at-end check + $queryLimit = $limit + 1; + $options['LIMIT'] = $queryLimit; + if ( $offsetCond ) { + $tlConds[] = $offsetCond; + $plConds[] = $offsetCond; + } + $fields = array( 'page_id', 'page_namespace', 'page_title', 'page_is_redirect' ); + + $plRes = $dbr->select( array( 'pagelinks', 'page' ), $fields, + $plConds, $fname, $options ); + $tlRes = $dbr->select( array( 'templatelinks', 'page' ), $fields, + $tlConds, $fname, $options ); + + if ( !$dbr->numRows( $plRes ) && !$dbr->numRows( $tlRes ) ) { + if ( 0 == $level ) { + $wgOut->addWikiText( wfMsg( 'nolinkshere' ) ); + } + return; + } + + // Read the rows into an array and remove duplicates + // templatelinks comes second so that the templatelinks row overwrites the + // pagelinks row, so we get (inclusion) rather than nothing + while ( $row = $dbr->fetchObject( $plRes ) ) { + $row->is_template = 0; + $rows[$row->page_id] = $row; + } + $dbr->freeResult( $plRes ); + while ( $row = $dbr->fetchObject( $tlRes ) ) { + $row->is_template = 1; + $rows[$row->page_id] = $row; + } + $dbr->freeResult( $tlRes ); + + // Sort by key and then change the keys to 0-based indices + ksort( $rows ); + $rows = array_values( $rows ); + + $numRows = count( $rows ); + + // Work out the start and end IDs, for prev/next links + if ( $dir == 'prev' ) { + // Descending order + if ( $numRows > $limit ) { + // More rows available before these ones + // Get the ID from the next row past the end of the displayed set + $prevId = $rows[$limit]->page_id; + // Remove undisplayed rows + $rows = array_slice( $rows, 0, $limit ); + } else { + // No more rows available before + $prevId = 0; + } + // Assume that the ID specified in $from exists, so there must be another page + $nextId = $from; + + // Reverse order ready for display + $rows = array_reverse( $rows ); + } else { + // Ascending + if ( $numRows > $limit ) { + // More rows available after these ones + // Get the ID from the last row in the result set + $nextId = $rows[$limit]->page_id; + // Remove undisplayed rows + $rows = array_slice( $rows, 0, $limit ); + } else { + // No more rows after + $nextId = false; + } + $prevId = $from; + } + + if ( 0 == $level ) { + $wgOut->addWikiText( wfMsg( 'linkshere' ) ); + } + $isredir = wfMsg( 'isredirect' ); + $istemplate = wfMsg( 'istemplate' ); + + if( $level == 0 ) { + $prevnext = $this->getPrevNext( $limit, $prevId, $nextId ); + $wgOut->addHTML( $prevnext ); + } + + $wgOut->addHTML( '<ul>' ); + foreach ( $rows as $row ) { + $nt = Title::makeTitle( $row->page_namespace, $row->page_title ); + + if ( $row->page_is_redirect ) { + $extra = 'redirect=no'; + } else { + $extra = ''; + } + + $link = $this->skin->makeKnownLinkObj( $nt, '', $extra ); + $wgOut->addHTML( '<li>'.$link ); + + // Display properties (redirect or template) + $props = array(); + if ( $row->page_is_redirect ) { + $props[] = $isredir; + } + if ( $row->is_template ) { + $props[] = $istemplate; + } + if ( count( $props ) ) { + // FIXME? Cultural assumption, hard-coded punctuation + $wgOut->addHTML( ' (' . implode( ', ', $props ) . ') ' ); + } + + if ( $row->page_is_redirect ) { + if ( $level < 2 ) { + $this->showIndirectLinks( $level + 1, $nt, 500 ); + } + } + $wgOut->addHTML( "</li>\n" ); + } + $wgOut->addHTML( "</ul>\n" ); + + if( $level == 0 ) { + $wgOut->addHTML( $prevnext ); + } + } + + function makeSelfLink( $text, $query ) { + return $this->skin->makeKnownLinkObj( $this->selfTitle, $text, $query ); + } + + function getPrevNext( $limit, $prevId, $nextId ) { + global $wgLang; + $fmtLimit = $wgLang->formatNum( $limit ); + $prev = wfMsg( 'prevn', $fmtLimit ); + $next = wfMsg( 'nextn', $fmtLimit ); + + if ( 0 != $prevId ) { + $prevLink = $this->makeSelfLink( $prev, "limit={$limit}&from={$prevId}&dir=prev" ); + } else { + $prevLink = $prev; + } + if ( 0 != $nextId ) { + $nextLink = $this->makeSelfLink( $next, "limit={$limit}&from={$nextId}" ); + } else { + $nextLink = $next; + } + $nums = $this->numLink( 20, $prevId ) . ' | ' . + $this->numLink( 50, $prevId ) . ' | ' . + $this->numLink( 100, $prevId ) . ' | ' . + $this->numLink( 250, $prevId ) . ' | ' . + $this->numLink( 500, $prevId ); + + return wfMsg( 'viewprevnext', $prevLink, $nextLink, $nums ); + } + + function numLink( $limit, $from ) { + global $wgLang; + $query = "limit={$limit}&from={$from}"; + $fmtLimit = $wgLang->formatNum( $limit ); + return $this->makeSelfLink( $fmtLimit, $query ); + } +} + +?> |