includes/SpecialWhatlinkshere.php

   1 <?php
   2 /**
   3  *
   4  * @package MediaWiki
   5  * @subpackage SpecialPage
   6  */
   7
   8 /**
   9  * Entry point
  10  * @param string $par An article name ??
  11  */
  12 function wfSpecialWhatlinkshere($par = NULL) {
  13         global $wgUser, $wgOut, $wgRequest;
  14         $fname = 'wfSpecialWhatlinkshere';
  15
  16         $target = isset($par) ? $par : $wgRequest->getVal( 'target' );
  17         list( $limit, $offset ) = $wgRequest->getLimitOffset();
  18
  19         if (is_null($target)) {
  20                 $wgOut->errorpage( 'notargettitle', 'notargettext' );
  21                 return;
  22         }
  23
  24         $nt = Title::newFromURL( $target );
  25         if( !$nt ) {
  26                 $wgOut->errorpage( 'notargettitle', 'notargettext' );
  27                 return;
  28         }
  29         $wgOut->setPagetitle( $nt->getPrefixedText() );
  30         $wgOut->setSubtitle( wfMsg( 'linklistsub' ) );
  31
  32         $sk = $wgUser->getSkin();
  33         $isredir = ' (' . wfMsg( 'isredirect' ) . ")\n";
  34
  35         $wgOut->addHTML('&lt; '.$sk->makeKnownLinkObj($nt, '', 'redirect=no' )."<br />\n");
  36
  37         wfShowIndirectLinks( 0, $nt, $limit, $offset );
  38 }
  39
  40 /**
  41  * @param int   $level
  42  * @param Title $target
  43  * @param int   $limit
  44  * @param int   $offset
  45  * @access private
  46  */
  47 function wfShowIndirectLinks( $level, $target, $limit, $offset = 0 ) {
  48         global $wgOut, $wgUser;
  49         $fname = 'wfShowIndirectLinks';
  50
  51         $dbr =& wfGetDB( DB_READ );
  52
  53         // Read one extra row as an at-end check
  54         $queryLimit = $limit + 1;
  55         $limitSql = ( $level == 0 )
  56                 ? "$offset,$queryLimit"
  57                 : $queryLimit;
  58
  59         $res = $dbr->select( array( 'pagelinks', 'page' ),
  60                 array( 'page_id', 'page_namespace', 'page_title', 'page_is_redirect' ),
  61                 array(
  62                         'pl_from=page_id',
  63                         'pl_namespace' => $target->getNamespace(),
  64                         'pl_title'     => $target->getDbKey() ),
  65                 $fname,
  66                 array( 'LIMIT' => $limitSql ) );
  67
  68         if ( 0 == $dbr->numRows( $res ) ) {
  69                 if ( 0 == $level ) {
  70                         $wgOut->addWikiText( wfMsg( 'nolinkshere' ) );
  71                 }
  72                 return;
  73         }
  74         if ( 0 == $level ) {
  75                 $wgOut->addWikiText( wfMsg( 'linkshere' ) );
  76         }
  77         $sk = $wgUser->getSkin();
  78         $isredir = ' (' . wfMsg( 'isredirect' ) . ")\n";
  79
  80         if( $dbr->numRows( $res ) == 0 ) {
  81                 return;
  82         }
  83         $atend = ( $dbr->numRows( $res ) <= $limit );
  84
  85         if( $level == 0 ) {
  86                 $specialTitle = Title::makeTitle( NS_SPECIAL, 'Whatlinkshere' );
  87                 $prevnext = wfViewPrevNext( $offset, $limit, $specialTitle,
  88                         'target=' . urlencode( $target->getPrefixedDbKey() ),
  89                         $atend );
  90                 $wgOut->addHTML( $prevnext );
  91         }
  92
  93         $wgOut->addHTML( '<ul>' );
  94         $linksShown = 0;
  95         while ( $row = $dbr->fetchObject( $res ) ) {
  96                 if( ++$linksShown > $limit ) {
  97                         // Last row is for checks only; don't display it.
  98                         break;
  99                 }
 100
 101                 $nt = Title::makeTitle( $row->page_namespace, $row->page_title );
 102
 103                 if ( $row->page_is_redirect ) {
 104                         $extra = 'redirect=no';
 105                 } else {
 106                         $extra = '';
 107                 }
 108
 109                 $link = $sk->makeKnownLinkObj( $nt, '', $extra );
 110                 $wgOut->addHTML( '<li>'.$link );
 111
 112                 if ( $row->page_is_redirect ) {
 113                         $wgOut->addHTML( $isredir );
 114                         if ( $level < 2 ) {
 115                                 wfShowIndirectLinks( $level + 1, $nt, 500 );
 116                         }
 117                 }
 118                 $wgOut->addHTML( "</li>\n" );
 119         }
 120         $wgOut->addHTML( "</ul>\n" );
 121
 122         if( $level == 0 ) {
 123                 $wgOut->addHTML( $prevnext );
 124         }
 125 }
 126
 127 ?>