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 global $wgCategoryMagicGallery;
  13 if( $wgCategoryMagicGallery )
  14         /** */
  15         require_once('ImageGallery.php');
  16
  17 /**
  18  * @package MediaWiki
  19  */
  20 class CategoryPage extends Article {
  21
  22         function view() {
  23                 if(!wfRunHooks('CategoryPageView', array(&$this))) return;
  24
  25                 if ( NS_CATEGORY == $this->mTitle->getNamespace() ) {
  26                         $this->openShowCategory();
  27                 }
  28
  29                 Article::view();
  30
  31                 # If the article we've just shown is in the "Image" namespace,
  32                 # follow it with the history list and link list for the image
  33                 # it describes.
  34
  35                 if ( NS_CATEGORY == $this->mTitle->getNamespace() ) {
  36                         $this->closeShowCategory();
  37                 }
  38         }
  39
  40         function openShowCategory() {
  41                 # For overloading
  42         }
  43
  44         # generate a list of subcategories and pages for a category
  45         # depending on wfMsg("usenewcategorypage") it either calls the new
  46         # or the old code. The new code will not work properly for some
  47         # languages due to sorting issues, so they might want to turn it
  48         # off.
  49
  50         function closeShowCategory() {
  51                 global $wgOut, $wgRequest;
  52                 $pageConditions = array();
  53                 $from = $wgRequest->getVal( 'from' );
  54                 $until = $wgRequest->getVal( 'until' );
  55                 $wgOut->addHTML( $this->doCategoryMagic( $from, $until ) );
  56         }
  57
  58         /**
  59          * Format the category data list.
  60          *
  61          * @param string $from -- return only sort keys from this item on
  62          * @param string $until -- don't return keys after this point.
  63          * @return string HTML output
  64          * @access private
  65          */
  66         function doCategoryMagic( $from = '', $until = '' ) {
  67                 global $wgContLang,$wgUser, $wgCategoryMagicGallery;
  68                 $fname = 'CategoryPage::doCategoryMagic';
  69                 wfProfileIn( $fname );
  70
  71                 $articles = array();
  72                 $articles_start_char = array();
  73                 $children = array();
  74                 $children_start_char = array();
  75                 $data = array();
  76                 if( $wgCategoryMagicGallery ) {
  77                         $ig = new ImageGallery();
  78                 }
  79
  80                 $dbr =& wfGetDB( DB_SLAVE );
  81                 if( $from != '' ) {
  82                         $pageCondition = 'cl_sortkey >= ' . $dbr->addQuotes( $from );
  83                         $flip = false;
  84                 } elseif( $until != '' ) {
  85                         $pageCondition = 'cl_sortkey < ' . $dbr->addQuotes( $until );
  86                         $flip = true;
  87                 } else {
  88                         $pageCondition = '1';
  89                         $flip = false;
  90                 }
  91                 $limit = 200;
  92                 $res = $dbr->select(
  93                         array( 'page', 'categorylinks' ),
  94                         array( 'page_title', 'page_namespace', 'page_len', 'cl_sortkey' ),
  95                         array( $pageCondition,
  96                                'cl_from          =  page_id',
  97                                'cl_to'           => $this->mTitle->getDBKey()),
  98                                #'page_is_redirect' => 0),
  99                         #+ $pageCondition,
 100                         $fname,
 101                         array( 'ORDER BY' => $flip ? 'cl_sortkey DESC' : 'cl_sortkey',
 102                                'LIMIT'    => $limit + 1 ) );
 103
 104                 $sk =& $wgUser->getSkin();
 105                 $r = "<br style=\"clear:both;\"/>\n";
 106                 $count = 0;
 107                 $nextPage = null;
 108                 while( $x = $dbr->fetchObject ( $res ) ) {
 109                         if( ++$count > $limit ) {
 110                                 // We've reached the one extra which shows that there are
 111                                 // additional pages to be had. Stop here...
 112                                 $nextPage = $x->cl_sortkey;
 113                                 break;
 114                         }
 115
 116                         $title = Title::makeTitle( $x->page_namespace, $x->page_title );
 117
 118                         if( $title->getNamespace() == NS_CATEGORY ) {
 119                                 // Subcategory; strip the 'Category' namespace from the link text.
 120                                 array_push( $children, $sk->makeKnownLinkObj( $title, $wgContLang->convertHtml( $title->getText() ) ) );
 121
 122                                 // If there's a link from Category:A to Category:B, the sortkey of the resulting
 123                                 // entry in the categorylinks table is Category:A, not A, which it SHOULD be.
 124                                 // Workaround: If sortkey == "Category:".$title, than use $title for sorting,
 125                                 // else use sortkey...
 126                                 $sortkey='';
 127                                 if( $title->getPrefixedText() == $x->cl_sortkey ) {
 128                                         $sortkey=$wgContLang->firstChar( $x->page_title );
 129                                 } else {
 130                                         $sortkey=$wgContLang->firstChar( $x->cl_sortkey );
 131                                 }
 132                                 array_push( $children_start_char, $wgContLang->convert( $sortkey ) ) ;
 133                         } elseif( $wgCategoryMagicGallery && $title->getNamespace() == NS_IMAGE ) {
 134                                 // Show thumbnails of categorized images, in a separate chunk
 135                                 if( $flip ) {
 136                                         $ig->insert( Image::newFromTitle( $title ) );
 137                                 } else {
 138                                         $ig->add( Image::newFromTitle( $title ) );
 139                                 }
 140                         } else {
 141                                 // Page in this category
 142                                 array_push( $articles, $sk->makeSizeLinkObj( $x->page_len, $title, $wgContLang->convert( $title->getPrefixedText() ) ) ) ;
 143                                 array_push( $articles_start_char, $wgContLang->convert( $wgContLang->firstChar( $x->cl_sortkey ) ) );
 144                         }
 145                 }
 146                 $dbr->freeResult( $res );
 147
 148                 if( $flip ) {
 149                         $children            = array_reverse( $children );
 150                         $children_start_char = array_reverse( $children_start_char );
 151                         $articles            = array_reverse( $articles );
 152                         $articles_start_char = array_reverse( $articles_start_char );
 153                 }
 154
 155                 if( $until != '' ) {
 156                         $r .= $this->pagingLinks( $this->mTitle, $nextPage, $until, $limit );
 157                 } elseif( $nextPage != '' || $from != '' ) {
 158                         $r .= $this->pagingLinks( $this->mTitle, $from, $nextPage, $limit );
 159                 }
 160
 161                 # Don't show subcategories section if there are none.
 162                 if( count( $children ) > 0 ) {
 163                         # Showing subcategories
 164                         $r .= '<h2>' . wfMsg( 'subcategories' ) . "</h2>\n";
 165                         $r .= $this->formatCount( $children, 'subcategorycount' );
 166                         $r .= $this->formatList( $children, $children_start_char );
 167                 }
 168
 169                 # Showing articles in this category
 170                 $ti = htmlspecialchars( $this->mTitle->getText() );
 171                 $r .= '<h2>' . wfMsg( 'category_header', $ti ) . "</h2>\n";
 172                 $r .= $this->formatCount( $articles, 'categoryarticlecount' );
 173                 $r .= $this->formatList( $articles, $articles_start_char );
 174
 175                 if( $wgCategoryMagicGallery && ! $ig->isEmpty() ) {
 176                         $r.= $ig->toHTML();
 177                 }
 178
 179                 wfProfileOut( $fname );
 180                 return $r;
 181         }
 182
 183         /**
 184          * @param array $articles
 185          * @param string $message
 186          * @return string
 187          * @access private
 188          */
 189         function formatCount( $articles, $message ) {
 190                 global $wgContLang;
 191                 $numart = count( $articles );
 192                 if( $numart == 1 ) {
 193                         # Slightly different message to avoid silly plural
 194                         $message .= '1';
 195                 }
 196                 return wfMsg( $message, $wgContLang->formatNum( $numart ) );
 197         }
 198         /**
 199          * Format a list of articles chunked by letter, either as a
 200          * bullet list or a columnar format, depending on the length.
 201          *
 202          * @param array $articles
 203          * @param array $articles_start_char
 204          * @param int   $cutoff
 205          * @return string
 206          * @access private
 207          */
 208         function formatList( $articles, $articles_start_char, $cutoff = 6 ) {
 209                 if ( count ( $articles ) > $cutoff ) {
 210                         return $this->columnList( $articles, $articles_start_char );
 211                 } elseif ( count($articles) > 0) {
 212                         // for short lists of articles in categories.
 213                         return $this->shortList( $articles, $articles_start_char );
 214                 }
 215                 return '';
 216         }
 217
 218         /**
 219          * Format a list of articles chunked by letter in a three-column
 220          * list, ordered vertically.
 221          *
 222          * @param array $articles
 223          * @param array $articles_start_char
 224          * @return string
 225          * @access private
 226          */
 227         function columnList( $articles, $articles_start_char ) {
 228                 // divide list into three equal chunks
 229                 $chunk = (int) (count ( $articles ) / 3);
 230
 231                 // get and display header
 232                 $r = '<table width="100%"><tr valign="top">';
 233
 234                 $prev_start_char = 'none';
 235
 236                 // loop through the chunks
 237                 for($startChunk = 0, $endChunk = $chunk, $chunkIndex = 0;
 238                         $chunkIndex < 3;
 239                         $chunkIndex++, $startChunk = $endChunk, $endChunk += $chunk + 1)
 240                 {
 241                         $r .= "<td>\n";
 242                         $atColumnTop = true;
 243
 244                         // output all articles in category
 245                         for ($index = $startChunk ;
 246                                 $index < $endChunk && $index < count($articles);
 247                                 $index++ )
 248                         {
 249                                 // check for change of starting letter or begining of chunk
 250                                 if ( ($index == $startChunk) ||
 251                                          ($articles_start_char[$index] != $articles_start_char[$index - 1]) )
 252
 253                                 {
 254                                         if( $atColumnTop ) {
 255                                                 $atColumnTop = false;
 256                                         } else {
 257                                                 $r .= "</ul>\n";
 258                                         }
 259                                         $cont_msg = "";
 260                                         if ( $articles_start_char[$index] == $prev_start_char )
 261                                                 $cont_msg = wfMsg('listingcontinuesabbrev');
 262                                         $r .= "<h3>{$articles_start_char[$index]}$cont_msg</h3>\n<ul>";
 263                                         $prev_start_char = $articles_start_char[$index];
 264                                 }
 265
 266                                 $r .= "<li>{$articles[$index]}</li>";
 267                         }
 268                         if( !$atColumnTop ) {
 269                                 $r .= "</ul>\n";
 270                         }
 271                         $r .= "</td>\n";
 272
 273
 274                 }
 275                 $r .= '</tr></table>';
 276                 return $r;
 277         }
 278
 279         /**
 280          * Format a list of articles chunked by letter in a bullet list.
 281          * @param array $articles
 282          * @param array $articles_start_char
 283          * @return string
 284          * @access private
 285          */
 286         function shortList( $articles, $articles_start_char ) {
 287                 $r = '<h3>'.$articles_start_char[0]."</h3>\n";
 288                 $r .= '<ul><li>'.$articles[0].'</li>';
 289                 for ($index = 1; $index < count($articles); $index++ )
 290                 {
 291                         if ($articles_start_char[$index] != $articles_start_char[$index - 1])
 292                         {
 293                                 $r .= "</ul><h3>{$articles_start_char[$index]}</h3>\n<ul>";
 294                         }
 295
 296                         $r .= "<li>{$articles[$index]}</li>";
 297                 }
 298                 $r .= '</ul>';
 299                 return $r;
 300         }
 301
 302         /**
 303          * @param Title  $title
 304          * @param string $first
 305          * @param string $last
 306          * @param int    $limit
 307          * @param array  $query - additional query options to pass
 308          * @return string
 309          * @access private
 310          */
 311         function pagingLinks( $title, $first, $last, $limit, $query = array() ) {
 312                 global $wgUser, $wgLang;
 313                 $sk =& $wgUser->getSkin();
 314                 $limitText = $wgLang->formatNum( $limit );
 315
 316                 $prevLink = htmlspecialchars( wfMsg( 'prevn', $limitText ) );
 317                 if( $first != '' ) {
 318                         $prevLink = $sk->makeLinkObj( $title, $prevLink,
 319                                 wfArrayToCGI( $query + array( 'until' => $first ) ) );
 320                 }
 321                 $nextLink = htmlspecialchars( wfMsg( 'nextn', $limitText ) );
 322                 if( $last != '' ) {
 323                         $nextLink = $sk->makeLinkObj( $title, $nextLink,
 324                                 wfArrayToCGI( $query + array( 'from' => $last ) ) );
 325                 }
 326
 327                 return "($prevLink) ($nextLink)";
 328         }
 329 }
 330
 331
 332 ?>