325 lines
9.5 KiB
PHP
325 lines
9.5 KiB
PHP
<?php
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/**
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*
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* @addtogroup SpecialPage
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*/
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/**
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* Entry point
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* @param string $par An article name ??
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*/
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function wfSpecialWhatlinkshere($par = NULL) {
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global $wgRequest;
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$page = new WhatLinksHerePage( $wgRequest, $par );
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$page->execute();
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}
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/**
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* implements Special:Whatlinkshere
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* @addtogroup SpecialPage
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*/
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class WhatLinksHerePage {
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var $request, $par;
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var $limit, $from, $back, $target;
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var $selfTitle, $skin;
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private $namespace;
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function WhatLinksHerePage( &$request, $par = null ) {
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global $wgUser;
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$this->request =& $request;
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$this->skin = $wgUser->getSkin();
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$this->par = $par;
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}
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function execute() {
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global $wgOut;
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$this->limit = min( $this->request->getInt( 'limit', 50 ), 5000 );
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if ( $this->limit <= 0 ) {
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$this->limit = 50;
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}
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$this->from = $this->request->getInt( 'from' );
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$this->back = $this->request->getInt( 'back' );
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$targetString = isset($this->par) ? $this->par : $this->request->getVal( 'target' );
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if (is_null($targetString)) {
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$wgOut->showErrorPage( 'notargettitle', 'notargettext' );
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return;
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}
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$this->target = Title::newFromURL( $targetString );
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if( !$this->target ) {
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$wgOut->showErrorPage( 'notargettitle', 'notargettext' );
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return;
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}
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$this->selfTitle = Title::makeTitleSafe( NS_SPECIAL,
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'Whatlinkshere/' . $this->target->getPrefixedDBkey() );
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$wgOut->setPagetitle( $this->target->getPrefixedText() );
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$wgOut->setSubtitle( wfMsg( 'linklistsub' ) );
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$wgOut->addHTML( wfMsg( 'whatlinkshere-barrow' ) . ' ' .$this->skin->makeLinkObj($this->target, '', 'redirect=no' )."<br />\n");
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$this->showIndirectLinks( 0, $this->target, $this->limit, $this->from, $this->back );
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}
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/**
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* @param int $level Recursion level
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* @param Title $target Target title
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* @param int $limit Number of entries to display
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* @param Title $from Display from this article ID
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* @param Title $back Display from this article ID at backwards scrolling
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* @private
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*/
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function showIndirectLinks( $level, $target, $limit, $from = 0, $back = 0 ) {
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global $wgOut;
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$fname = 'WhatLinksHerePage::showIndirectLinks';
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$dbr = wfGetDB( DB_READ );
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$options = array();
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$ns = $this->request->getIntOrNull( 'namespace' );
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if ( isset( $ns ) ) {
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$options['namespace'] = $ns;
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$this->setNamespace( $options['namespace'] );
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} else {
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$options['namespace'] = '';
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}
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// Make the query
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$plConds = array(
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'page_id=pl_from',
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'pl_namespace' => $target->getNamespace(),
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'pl_title' => $target->getDBkey(),
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);
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$tlConds = array(
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'page_id=tl_from',
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'tl_namespace' => $target->getNamespace(),
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'tl_title' => $target->getDBkey(),
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);
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if ( $this->namespace !== null ){
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$plConds['page_namespace'] = (int)$this->namespace;
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$tlConds['page_namespace'] = (int)$this->namespace;
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}
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if ( $from ) {
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$from = (int)$from; // just in case
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$tlConds[] = "tl_from >= $from";
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$plConds[] = "pl_from >= $from";
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}
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// Read an extra row as an at-end check
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$queryLimit = $limit + 1;
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// enforce join order, sometimes namespace selector may
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// trigger filesorts which are far less efficient than scanning many entries
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$options[] = 'STRAIGHT_JOIN';
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$options['LIMIT'] = $queryLimit;
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$fields = array( 'page_id', 'page_namespace', 'page_title', 'page_is_redirect' );
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$options['ORDER BY'] = 'pl_from';
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$plRes = $dbr->select( array( 'pagelinks', 'page' ), $fields,
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$plConds, $fname, $options );
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$options['ORDER BY'] = 'tl_from';
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$tlRes = $dbr->select( array( 'templatelinks', 'page' ), $fields,
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$tlConds, $fname, $options );
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if ( !$dbr->numRows( $plRes ) && !$dbr->numRows( $tlRes ) ) {
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if ( 0 == $level && !isset( $this->namespace ) ) {
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// really no links to here
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$wgOut->addWikiText( wfMsg( 'nolinkshere', $this->target->getPrefixedText() ) );
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} elseif ( 0 == $level && isset( $this->namespace ) ) {
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// no links from requested namespace to here
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$options = array(); // reinitialize for a further namespace search
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$options['namespace'] = $this->namespace;
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$options['target'] = $this->target->getPrefixedText();
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list( $options['limit'], $options['offset']) = wfCheckLimits();
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$wgOut->addHTML( $this->whatlinkshereForm( $options ) );
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$wgOut->addWikiText( wfMsg( 'nolinkshere-ns', $this->target->getPrefixedText() ) );
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}
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return;
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}
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$options = array();
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list( $options['limit'], $options['offset']) = wfCheckLimits();
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if ( ( $ns = $this->request->getVal( 'namespace', null ) ) !== null && $ns !== '' && ctype_digit($ns) ) {
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$options['namespace'] = intval( $ns );
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$this->setNamespace( $options['namespace'] );
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} else {
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$options['namespace'] = '';
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$this->setNamespace( null );
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}
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$options['offset'] = $this->request->getVal( 'offset' );
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/* Offset must be an integral. */
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if ( !strlen( $options['offset'] ) || !preg_match( '/^[0-9]+$/', $options['offset'] ) )
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$options['offset'] = '';
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$options['target'] = $this->target->getPrefixedDBkey();
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// Read the rows into an array and remove duplicates
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// templatelinks comes second so that the templatelinks row overwrites the
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// pagelinks row, so we get (inclusion) rather than nothing
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while ( $row = $dbr->fetchObject( $plRes ) ) {
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$row->is_template = 0;
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$rows[$row->page_id] = $row;
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}
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$dbr->freeResult( $plRes );
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while ( $row = $dbr->fetchObject( $tlRes ) ) {
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$row->is_template = 1;
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$rows[$row->page_id] = $row;
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}
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$dbr->freeResult( $tlRes );
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// Sort by key and then change the keys to 0-based indices
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ksort( $rows );
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$rows = array_values( $rows );
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$numRows = count( $rows );
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// Work out the start and end IDs, for prev/next links
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if ( $numRows > $limit ) {
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// More rows available after these ones
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// Get the ID from the last row in the result set
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$nextId = $rows[$limit]->page_id;
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// Remove undisplayed rows
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$rows = array_slice( $rows, 0, $limit );
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} else {
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// No more rows after
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$nextId = false;
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}
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$prevId = $from;
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if ( $level == 0 ) {
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$wgOut->addHTML( $this->whatlinkshereForm( $options ) );
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$wgOut->addWikiText( wfMsg( 'linkshere', $this->target->getPrefixedText() ) );
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}
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$isredir = wfMsg( 'isredirect' );
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$istemplate = wfMsg( 'istemplate' );
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if( $level == 0 ) {
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$prevnext = $this->getPrevNext( $limit, $prevId, $nextId, $options['namespace'] );
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$wgOut->addHTML( $prevnext );
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}
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$wgOut->addHTML( '<ul>' );
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foreach ( $rows as $row ) {
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$nt = Title::makeTitle( $row->page_namespace, $row->page_title );
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if ( $row->page_is_redirect ) {
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$extra = 'redirect=no';
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} else {
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$extra = '';
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}
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$link = $this->skin->makeKnownLinkObj( $nt, '', $extra );
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$wgOut->addHTML( '<li>'.$link );
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// Display properties (redirect or template)
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$props = array();
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if ( $row->page_is_redirect ) {
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$props[] = $isredir;
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}
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if ( $row->is_template ) {
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$props[] = $istemplate;
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}
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if ( count( $props ) ) {
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// FIXME? Cultural assumption, hard-coded punctuation
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$wgOut->addHTML( ' (' . implode( ', ', $props ) . ') ' );
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}
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//add whatlinkshere link
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$whatlink = $this->skin->makeKnownLinkObj(
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SpecialPage::getTitleFor( 'Whatlinkshere', $nt->getPrefixedDBkey() ),
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wfMsgHtml( 'whatlinkshere-links' ) );
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$wgOut->addHTML(" ($whatlink)" );
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if ( $row->page_is_redirect ) {
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if ( $level < 2 ) {
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$this->showIndirectLinks( $level + 1, $nt, 500 );
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}
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}
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$wgOut->addHTML( "</li>\n" );
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}
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$wgOut->addHTML( "</ul>\n" );
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if( $level == 0 ) {
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$wgOut->addHTML( $prevnext );
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}
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}
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function makeSelfLink( $text, $query ) {
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return $this->skin->makeKnownLinkObj( $this->selfTitle, $text, $query );
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}
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function getPrevNext( $limit, $prevId, $nextId ) {
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global $wgLang;
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$fmtLimit = $wgLang->formatNum( $limit );
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$prev = wfMsgExt( 'whatlinkshere-prev', array( 'parsemag', 'escape' ), $fmtLimit );
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$next = wfMsgExt( 'whatlinkshere-next', array( 'parsemag', 'escape' ), $fmtLimit );
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$nsText = '';
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if( is_int($this->namespace) ) {
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$nsText = "&namespace={$this->namespace}";
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}
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if ( 0 != $prevId ) {
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$prevLink = $this->makeSelfLink( $prev, "limit={$limit}&from={$this->back}{$nsText}" );
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} else {
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$prevLink = $prev;
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}
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if ( 0 != $nextId ) {
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$nextLink = $this->makeSelfLink( $next, "limit={$limit}&from={$nextId}&back={$prevId}{$nsText}" );
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} else {
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$nextLink = $next;
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}
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$nums = $this->numLink( 20, $prevId ) . ' | ' .
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$this->numLink( 50, $prevId ) . ' | ' .
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$this->numLink( 100, $prevId ) . ' | ' .
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$this->numLink( 250, $prevId ) . ' | ' .
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$this->numLink( 500, $prevId );
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return wfMsg( 'viewprevnext', $prevLink, $nextLink, $nums );
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}
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function numLink( $limit, $from, $ns = null ) {
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global $wgLang;
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$query = "limit={$limit}&from={$from}";
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if( is_int($this->namespace) ) { $query .= "&namespace={$this->namespace}";}
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$fmtLimit = $wgLang->formatNum( $limit );
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return $this->makeSelfLink( $fmtLimit, $query );
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}
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function whatlinkshereForm( $options ) {
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global $wgScript, $wgTitle;
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$options['title'] = $wgTitle->getPrefixedText();
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$f = Xml::openElement( 'form', array( 'method' => 'get', 'action' => "$wgScript" ) ) .
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'<fieldset>' .
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Xml::element( 'legend', array(), wfMsg( 'whatlinkshere' ) );
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foreach ( $options as $name => $value ) {
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if( $name === 'namespace') continue;
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$f .= "\t" . Xml::hidden( $name, $value ). "\n";
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}
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$f .= Xml::label( wfMsg( 'namespace' ), 'namespace' ) . ' ' .
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Xml::namespaceSelector( $options['namespace'], '' ) .
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Xml::submitButton( wfMsg( 'allpagessubmit' ) ) .
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'</fieldset>' .
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Xml::closeElement( 'form' ) . "\n";
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return $f;
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}
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/** Set the namespace we are filtering on */
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private function setNamespace( $ns ) {
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$this->namespace = $ns;
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}
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}
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?>
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