includes/PageHistory.php

   1 <?php
   2 /**
   3  * Page history
   4  *
   5  * Split off from Article.php and Skin.php, 2003-12-22
   6  * @package MediaWiki
   7  */
   8
   9 /**
  10  * @todo document
  11  * @package MediaWiki
  12  */
  13 class PageHistory {
  14         var $mArticle, $mTitle, $mSkin;
  15         var $lastline, $lastdate;
  16         var $linesonpage;
  17         function PageHistory( $article ) {
  18                 $this->mArticle =& $article;
  19                 $this->mTitle =& $article->mTitle;
  20         }
  21
  22         # This shares a lot of issues (and code) with Recent Changes
  23
  24         function history() {
  25                 global $wgUser, $wgOut, $wgLang;
  26
  27                 # If page hasn't changed, client can cache this
  28
  29                 if( $wgOut->checkLastModified( $this->mArticle->getTimestamp() ) ){
  30                         # Client cache fresh and headers sent, nothing more to do.
  31                         return;
  32                 }
  33                 $fname = 'PageHistory::history';
  34                 wfProfileIn( $fname );
  35
  36                 $wgOut->setPageTitle( $this->mTitle->getPRefixedText() );
  37                 $wgOut->setSubtitle( wfMsg( 'revhistory' ) );
  38                 $wgOut->setArticleFlag( false );
  39                 $wgOut->setArticleRelated( true );
  40                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
  41
  42                 if( $this->mTitle->getArticleID() == 0 ) {
  43                         $wgOut->addHTML( wfMsg( 'nohistory' ) );
  44                         wfProfileOut( $fname );
  45                         return;
  46                 }
  47
  48                 list( $limit, $offset ) = wfCheckLimits();
  49
  50                 /* We have to draw the latest revision from 'cur' */
  51                 $rawlimit = $limit;
  52                 $rawoffset = $offset - 1;
  53                 if( 0 == $offset ) {
  54                         $rawlimit--;
  55                         $rawoffset = 0;
  56                 }
  57                 /* Check one extra row to see whether we need to show 'next' and diff links */
  58                 $limitplus = $rawlimit + 1;
  59
  60                 $namespace = $this->mTitle->getNamespace();
  61                 $title = $this->mTitle->getText();
  62
  63                 $db =& wfGetDB( DB_SLAVE );
  64                 $use_index = $db->useIndexClause( 'name_title_timestamp' );
  65                 $oldtable = $db->tableName( 'old' );
  66
  67                 $sql = "SELECT old_id,old_user," .
  68                   "old_comment,old_user_text,old_timestamp,old_minor_edit ".
  69                   "FROM $oldtable $use_index " .
  70                   "WHERE old_namespace={$namespace} AND " .
  71                   "old_title='" . $db->strencode( $this->mTitle->getDBkey() ) . "' " .
  72                   "ORDER BY inverse_timestamp".$db->limitResult($limitplus,$rawoffset);
  73                 $res = $db->query( $sql, $fname );
  74
  75                 $revs = $db->numRows( $res );
  76
  77                 if( $revs < $limitplus ) // the sql above tries to fetch one extra
  78                         $this->linesonpage = $revs;
  79                 else
  80                         $this->linesonpage = $revs - 1;
  81
  82                 $atend = ($revs < $limitplus);
  83
  84                 $this->mSkin = $wgUser->getSkin();
  85                 $numbar = wfViewPrevNext(
  86                         $offset, $limit,
  87                         $this->mTitle->getPrefixedText(),
  88                         'action=history', $atend );
  89                 $s = $numbar;
  90                 if($this->linesonpage > 0) {
  91                         $submitpart1 = '<input class="historysubmit" type="submit" accesskey="'.wfMsg('accesskey-compareselectedversions').
  92                         '" title="'.wfMsg('tooltip-compareselectedversions').'" value="'.wfMsg('compareselectedversions').'"';
  93                         $this->submitbuttonhtml1 = $submitpart1 . ' />';
  94                         $this->submitbuttonhtml2 = $submitpart1 . ' id="historysubmit" />';
  95                 }
  96                 $s .= $this->beginHistoryList();
  97                 $counter = 1;
  98                 if( $offset == 0 ){
  99                         $this->linesonpage++;
 100                         $s .= $this->historyLine(
 101                                 $this->mArticle->getTimestamp(),
 102                                 $this->mArticle->getUser(),
 103                                 $this->mArticle->getUserText(), $namespace,
 104                                 $title, 0, $this->mArticle->getComment(),
 105                                 ( $this->mArticle->getMinorEdit() > 0 ),
 106                                 $counter++
 107                         );
 108                 }
 109                 while ( $line = $db->fetchObject( $res ) ) {
 110                         $s .= $this->historyLine(
 111                                 $line->old_timestamp, $line->old_user,
 112                                 $line->old_user_text, $namespace,
 113                                 $title, $line->old_id,
 114                                 $line->old_comment, ( $line->old_minor_edit > 0 ),
 115                                 $counter++
 116                         );
 117                 }
 118                 $s .= $this->endHistoryList( !$atend );
 119                 $s .= $numbar;
 120                 $wgOut->addHTML( $s );
 121                 wfProfileOut( $fname );
 122         }
 123
 124         function beginHistoryList() {
 125                 global $wgTitle;
 126                 $this->lastdate = $this->lastline = '';
 127                 $s = '<p>' . wfMsg( 'histlegend' ) . '</p>';
 128                 $s .= '<form action="' . $wgTitle->escapeLocalURL( '-' ) . '" method="get">';
 129                 $prefixedkey = htmlspecialchars($wgTitle->getPrefixedDbKey());
 130                 $s .= "<input type='hidden' name='title' value=\"{$prefixedkey}\" />\n";
 131                 $s .= !empty($this->submitbuttonhtml1) ? $this->submitbuttonhtml1."\n":'';
 132                 $s .= '<ul id="pagehistory">';
 133                 return $s;
 134         }
 135
 136         function endHistoryList( $skip = false ) {
 137                 $last = wfMsg( 'last' );
 138
 139                 $s = $skip ? '' : preg_replace( "/!OLDID![0-9]+!/", $last, $this->lastline );
 140                 $s .= '</ul>';
 141                 $s .= !empty($this->submitbuttonhtml2) ? $this->submitbuttonhtml2 : '';
 142                 $s .= '</form>';
 143                 return $s;
 144         }
 145
 146         function historyLine( $ts, $u, $ut, $ns, $ttl, $oid, $c, $isminor, $counter = '' ) {
 147                 global $wgLang, $wgContLang;
 148
 149                 static $message;
 150                 if( !isset( $message ) ) {
 151                         foreach( explode( ' ', 'cur last selectolderversionfordiff selectnewerversionfordiff minoreditletter' ) as $msg ) {
 152                                 $message[$msg] = wfMsg( $msg );
 153                         }
 154                 }
 155
 156                 if ( $oid && $this->lastline ) {
 157                         $ret = preg_replace( "/!OLDID!([0-9]+)!/", $this->mSkin->makeKnownLinkObj(
 158                           $this->mTitle, $message['last'], "diff=\\1&oldid={$oid}",'' ,'' ,' tabindex="'.$counter.'"' ), $this->lastline );
 159                 } else {
 160                         $ret = '';
 161                 }
 162                 $dt = $wgLang->timeanddate( $ts, true );
 163
 164                 if ( $oid ) {
 165                         $q = 'oldid='.$oid;
 166                 } else {
 167                         $q = '';
 168                 }
 169                 $link = $this->mSkin->makeKnownLinkObj( $this->mTitle, $dt, $q );
 170
 171                 if ( 0 == $u ) {
 172                         $contribsPage =& Title::makeTitle( NS_SPECIAL, 'Contributions' );
 173                         $ul = $this->mSkin->makeKnownLinkObj( $contribsPage,
 174                                 htmlspecialchars( $ut ), 'target=' . urlencode( $ut ) );
 175                 } else {
 176                         $userPage =& Title::makeTitle( NS_USER, $ut );
 177                         $ul = $this->mSkin->makeLinkObj( $userPage , htmlspecialchars( $ut ) );
 178                 }
 179
 180                 $s = '<li>';
 181                 if ( $oid ) {
 182                         $curlink = $this->mSkin->makeKnownLinkObj( $this->mTitle, $message['cur'],
 183                           'diff=0&oldid='.$oid );
 184                 } else {
 185                         $curlink = $message['cur'];
 186                 }
 187                 $arbitrary = '';
 188                 if( $this->linesonpage > 1) {
 189                         # XXX: move title texts to javascript
 190                         $checkmark = '';
 191                         if ( !$oid ) {
 192                                 $arbitrary = '<input type="radio" style="visibility:hidden" name="oldid" value="'.$oid.'" title="'.$message['selectolderversionfordiff'].'" />';
 193                                 $checkmark = ' checked="checked"';
 194                         } else {
 195                                 if( $counter == 2 ) $checkmark = ' checked="checked"';
 196                                 $arbitrary = '<input type="radio" name="oldid" value="'.$oid.'" title="'.$message['selectolderversionfordiff'].'"'.$checkmark.' />';
 197                                 $checkmark = '';
 198                         }
 199                         $arbitrary .= '<input type="radio" name="diff" value="'.$oid.'" title="'.$message['selectnewerversionfordiff'].'"'.$checkmark.' />';
 200                 }
 201                 $s .= "({$curlink}) (!OLDID!{$oid}!) $arbitrary {$link} <span class='user'>{$ul}</span>";
 202                 $s .= $isminor ? ' <span class="minor">'.$message['minoreditletter'].'</span>': '' ;
 203
 204
 205                 if ( '' != $c && '*' != $c ) {
 206                         $c = $this->mSkin->formatcomment( $c, $this->mTitle );
 207                         $s .= " <em>($c)</em>";
 208                 }
 209                 $s .= '</li>';
 210
 211                 $this->lastline = $s;
 212                 return $ret;
 213         }
 214
 215 }
 216
 217 ?>