includes/CategoryPage.php

   1 <?php
   2 /**
   3  * Special handling for category description pages
   4  * Modelled after ImagePage.php
   5  *
   6  * @package MediaWiki
   7  */
   8
   9 if( !defined( 'MEDIAWIKI' ) )
  10         die();
  11
  12 if( $wgCategoryMagicGallery )
  13         /** */
  14         require_once('ImageGallery.php');
  15
  16 /**
  17  * @package MediaWiki
  18  */
  19 class CategoryPage extends Article {
  20
  21         function view() {
  22                 if(!wfRunHooks('CategoryPageView', array(&$this))) return;
  23
  24                 if ( NS_CATEGORY == $this->mTitle->getNamespace() ) {
  25                         $this->openShowCategory();
  26                 }
  27
  28                 Article::view();
  29
  30                 # If the article we've just shown is in the "Image" namespace,
  31                 # follow it with the history list and link list for the image
  32                 # it describes.
  33
  34                 if ( NS_CATEGORY == $this->mTitle->getNamespace() ) {
  35                         $this->closeShowCategory();
  36                 }
  37         }
  38
  39         function openShowCategory() {
  40                 # For overloading
  41         }
  42
  43         # generate a list of subcategories and pages for a category
  44         # depending on wfMsg("usenewcategorypage") it either calls the new
  45         # or the old code. The new code will not work properly for some
  46         # languages due to sorting issues, so they might want to turn it
  47         # off.
  48
  49         function closeShowCategory() {
  50                 global $wgOut, $wgRequest;
  51                 $pageConditions = array();
  52                 $from = $wgRequest->getVal( 'from' );
  53                 $until = $wgRequest->getVal( 'until' );
  54                 $wgOut->addHTML( $this->doCategoryMagic( $from, $until ) );
  55         }
  56
  57         /**
  58          * Format the category data list.
  59          *
  60          * @param string $from -- return only sort keys from this item on
  61          * @param string $until -- don't return keys after this point.
  62          * @return string HTML output
  63          * @access private
  64          */
  65         function doCategoryMagic( $from = '', $until = '' ) {
  66                 global $wgContLang,$wgUser, $wgCategoryMagicGallery;
  67                 $fname = 'CategoryPage::doCategoryMagic';
  68                 wfProfileIn( $fname );
  69
  70                 $articles = array();
  71                 $articles_start_char = array();
  72                 $children = array();
  73                 $children_start_char = array();
  74                 $data = array();
  75                 if( $wgCategoryMagicGallery ) {
  76                         $ig = new ImageGallery();
  77                 }
  78
  79                 $dbr =& wfGetDB( DB_SLAVE );
  80                 if( $from != '' ) {
  81                         $pageCondition = 'cl_sortkey >= ' . $dbr->addQuotes( $from );
  82                         $flip = false;
  83                 } elseif( $until != '' ) {
  84                         $pageCondition = 'cl_sortkey < ' . $dbr->addQuotes( $until );
  85                         $flip = true;
  86                 } else {
  87                         $pageCondition = '1';
  88                         $flip = false;
  89                 }
  90                 $limit = 200;
  91                 $res = $dbr->select(
  92                         array( 'page', 'categorylinks' ),
  93                         array( 'page_title', 'page_namespace', 'cl_sortkey' ),
  94                         array( $pageCondition,
  95                                'cl_from          =  page_id',
  96                                'cl_to'           => $this->mTitle->getDBKey()),
  97                                #'page_is_redirect' => 0),
  98                         #+ $pageCondition,
  99                         $fname,
 100                         array( 'ORDER BY' => $flip ? 'cl_sortkey DESC' : 'cl_sortkey',
 101                                'LIMIT'    => $limit + 1 ) );
 102
 103                 $sk =& $wgUser->getSkin();
 104                 $r = "<br style=\"clear:both;\"/>\n";
 105                 $count = 0;
 106                 $nextPage = null;
 107                 while( $x = $dbr->fetchObject ( $res ) ) {
 108                         if( ++$count > $limit ) {
 109                                 // We've reached the one extra which shows that there are
 110                                 // additional pages to be had. Stop here...
 111                                 $nextPage = $x->cl_sortkey;
 112                                 break;
 113                         }
 114
 115                         $title = Title::makeTitle( $x->page_namespace, $x->page_title );
 116
 117                         if( $title->getNamespace() == NS_CATEGORY ) {
 118                                 // Subcategory; strip the 'Category' namespace from the link text.
 119                                 array_push( $children, $sk->makeKnownLinkObj( $title, $title->getText() ) );
 120
 121                                 // If there's a link from Category:A to Category:B, the sortkey of the resulting
 122                                 // entry in the categorylinks table is Category:A, not A, which it SHOULD be.
 123                                 // Workaround: If sortkey == "Category:".$title, than use $title for sorting,
 124                                 // else use sortkey...
 125                                 if( $title->getPrefixedText() == $x->cl_sortkey ) {
 126                                         array_push( $children_start_char, $wgContLang->firstChar( $x->page_title ) );
 127                                 } else {
 128                                         array_push( $children_start_char, $wgContLang->firstChar( $x->cl_sortkey ) ) ;
 129                                 }
 130                         } elseif( $wgCategoryMagicGallery && $title->getNamespace() == NS_IMAGE ) {
 131                                 // Show thumbnails of categorized images, in a separate chunk
 132                                 if( $flip ) {
 133                                         $ig->insert( Image::newFromTitle( $title ) );
 134                                 } else {
 135                                         $ig->add( Image::newFromTitle( $title ) );
 136                                 }
 137                         } else {
 138                                 // Page in this category
 139                                 array_push( $articles, $sk->makeKnownLinkObj( $title ) ) ;
 140                                 array_push( $articles_start_char, $wgContLang->firstChar( $x->cl_sortkey ) ) ;
 141                         }
 142                 }
 143                 $dbr->freeResult( $res );
 144
 145                 if( $flip ) {
 146                         $children            = array_reverse( $children );
 147                         $children_start_char = array_reverse( $children_start_char );
 148                         $articles            = array_reverse( $articles );
 149                         $articles_start_char = array_reverse( $articles_start_char );
 150                 }
 151
 152                 if( $until != '' ) {
 153                         $r .= $this->pagingLinks( $this->mTitle, $nextPage, $until, $limit );
 154                 } elseif( $nextPage != '' || $from != '' ) {
 155                         $r .= $this->pagingLinks( $this->mTitle, $from, $nextPage, $limit );
 156                 }
 157
 158                 # Don't show subcategories section if there are none.
 159                 if( count( $children ) > 0 ) {
 160                         # Showing subcategories
 161                         $r .= '<h2>' . wfMsg( 'subcategories' ) . "</h2>\n";
 162                         $r .= $this->formatCount( $children, 'subcategorycount' );
 163                         $r .= $this->formatList( $children, $children_start_char );
 164                 }
 165
 166                 # Showing articles in this category
 167                 $ti = htmlspecialchars( $this->mTitle->getText() );
 168                 $r .= '<h2>' . wfMsg( 'category_header', $ti ) . "</h2>\n";
 169                 $r .= $this->formatCount( $articles, 'categoryarticlecount' );
 170                 $r .= $this->formatList( $articles, $articles_start_char );
 171
 172                 if( $wgCategoryMagicGallery && ! $ig->isEmpty() ) {
 173                         $r.= $ig->toHTML();
 174                 }
 175
 176                 wfProfileOut( $fname );
 177                 return $r;
 178         }
 179
 180         /**
 181          * @param array $articles
 182          * @param string $message
 183          * @return string
 184          * @access private
 185          */
 186         function formatCount( $articles, $message ) {
 187                 global $wgContLang;
 188                 $numart = count( $articles );
 189                 if( $numart == 1 ) {
 190                         # Slightly different message to avoid silly plural
 191                         $message .= '1';
 192                 }
 193                 return wfMsg( $message, $wgContLang->formatNum( $numart ) );
 194         }
 195         /**
 196          * Format a list of articles chunked by letter, either as a
 197          * bullet list or a columnar format, depending on the length.
 198          *
 199          * @param array $articles
 200          * @param array $articles_start_char
 201          * @param int   $cutoff
 202          * @return string
 203          * @access private
 204          */
 205         function formatList( $articles, $articles_start_char, $cutoff = 6 ) {
 206                 if ( count ( $articles ) > $cutoff ) {
 207                         return $this->columnList( $articles, $articles_start_char );
 208                 } elseif ( count($articles) > 0) {
 209                         // for short lists of articles in categories.
 210                         return $this->shortList( $articles, $articles_start_char );
 211                 }
 212                 return '';
 213         }
 214
 215         /**
 216          * Format a list of articles chunked by letter in a three-column
 217          * list, ordered vertically.
 218          *
 219          * @param array $articles
 220          * @param array $articles_start_char
 221          * @return string
 222          * @access private
 223          */
 224         function columnList( $articles, $articles_start_char ) {
 225                 // divide list into three equal chunks
 226                 $chunk = (int) (count ( $articles ) / 3);
 227
 228                 // get and display header
 229                 $r = '<table width="100%"><tr valign="top">';
 230
 231                 $prev_start_char = 'none';
 232
 233                 // loop through the chunks
 234                 for($startChunk = 0, $endChunk = $chunk, $chunkIndex = 0;
 235                         $chunkIndex < 3;
 236                         $chunkIndex++, $startChunk = $endChunk, $endChunk += $chunk + 1)
 237                 {
 238                         $r .= "<td>\n";
 239                         $atColumnTop = true;
 240
 241                         // output all articles in category
 242                         for ($index = $startChunk ;
 243                                 $index < $endChunk && $index < count($articles);
 244                                 $index++ )
 245                         {
 246                                 // check for change of starting letter or begining of chunk
 247                                 if ( ($index == $startChunk) ||
 248                                          ($articles_start_char[$index] != $articles_start_char[$index - 1]) )
 249
 250                                 {
 251                                         if( $atColumnTop ) {
 252                                                 $atColumnTop = false;
 253                                         } else {
 254                                                 $r .= "</ul>\n";
 255                                         }
 256                                         $cont_msg = "";
 257                                         if ( $articles_start_char[$index] == $prev_start_char )
 258                                                 $cont_msg = wfMsg('listingcontinuesabbrev');
 259                                         $r .= "<h3>{$articles_start_char[$index]}$cont_msg</h3>\n<ul>";
 260                                         $prev_start_char = $articles_start_char[$index];
 261                                 }
 262
 263                                 $r .= "<li>{$articles[$index]}</li>";
 264                         }
 265                         if( !$atColumnTop ) {
 266                                 $r .= "</ul>\n";
 267                         }
 268                         $r .= "</td>\n";
 269
 270
 271                 }
 272                 $r .= '</tr></table>';
 273                 return $r;
 274         }
 275
 276         /**
 277          * Format a list of articles chunked by letter in a bullet list.
 278          * @param array $articles
 279          * @param array $articles_start_char
 280          * @return string
 281          * @access private
 282          */
 283         function shortList( $articles, $articles_start_char ) {
 284                 $r = '<h3>'.$articles_start_char[0]."</h3>\n";
 285                 $r .= '<ul><li>'.$articles[0].'</li>';
 286                 for ($index = 1; $index < count($articles); $index++ )
 287                 {
 288                         if ($articles_start_char[$index] != $articles_start_char[$index - 1])
 289                         {
 290                                 $r .= "</ul><h3>{$articles_start_char[$index]}</h3>\n<ul>";
 291                         }
 292
 293                         $r .= "<li>{$articles[$index]}</li>";
 294                 }
 295                 $r .= '</ul>';
 296                 return $r;
 297         }
 298
 299         /**
 300          * @param Title  $title
 301          * @param string $first
 302          * @param string $last
 303          * @param int    $limit
 304          * @param array  $query - additional query options to pass
 305          * @return string
 306          * @access private
 307          */
 308         function pagingLinks( $title, $first, $last, $limit, $query = array() ) {
 309                 global $wgUser, $wgLang;
 310                 $sk =& $wgUser->getSkin();
 311                 $limitText = $wgLang->formatNum( $limit );
 312
 313                 $prevLink = htmlspecialchars( wfMsg( 'prevn', $limitText ) );
 314                 if( $first != '' ) {
 315                         $prevLink = $sk->makeLinkObj( $title, $prevLink,
 316                                 wfArrayToCGI( $query + array( 'until' => $first ) ) );
 317                 }
 318                 $nextLink = htmlspecialchars( wfMsg( 'nextn', $limitText ) );
 319                 if( $last != '' ) {
 320                         $nextLink = $sk->makeLinkObj( $title, $nextLink,
 321                                 wfArrayToCGI( $query + array( 'from' => $last ) ) );
 322                 }
 323
 324                 return "($prevLink) ($nextLink)";
 325         }
 326 }
 327
 328
 329 ?>