includes/CategoryPage.php

   1 <?php
   2 /**
   3  * Special handling for category description pages
   4  * Modelled after ImagePage.php
   5  *
   6  */
   7
   8 if( !defined( 'MEDIAWIKI' ) )
   9         die( 1 );
  10
  11 /**
  12  */
  13 class CategoryPage extends Article {
  14         function view() {
  15                 global $wgRequest, $wgUser;
  16
  17                 $diff = $wgRequest->getVal( 'diff' );
  18                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  19
  20                 if ( isset( $diff ) && $diffOnly )
  21                         return Article::view();
  22
  23                 if(!wfRunHooks('CategoryPageView', array(&$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         function closeShowCategory() {
  45                 global $wgOut, $wgRequest;
  46                 $from = $wgRequest->getVal( 'from' );
  47                 $until = $wgRequest->getVal( 'until' );
  48
  49                 $viewer = new CategoryViewer( $this->mTitle, $from, $until );
  50                 $wgOut->addHTML( $viewer->getHTML() );
  51         }
  52 }
  53
  54 class CategoryViewer {
  55         var $title, $limit, $from, $until,
  56                 $articles, $articles_start_char,
  57                 $children, $children_start_char,
  58                 $showGallery, $gallery,
  59                 $skin;
  60
  61         function __construct( $title, $from = '', $until = '' ) {
  62                 global $wgCategoryPagingLimit;
  63                 $this->title = $title;
  64                 $this->from = $from;
  65                 $this->until = $until;
  66                 $this->limit = $wgCategoryPagingLimit;
  67         }
  68
  69         /**
  70          * Format the category data list.
  71          *
  72          * @param string $from -- return only sort keys from this item on
  73          * @param string $until -- don't return keys after this point.
  74          * @return string HTML output
  75          * @private
  76          */
  77         function getHTML() {
  78                 global $wgOut, $wgCategoryMagicGallery, $wgCategoryPagingLimit;
  79                 wfProfileIn( __METHOD__ );
  80
  81                 $this->showGallery = $wgCategoryMagicGallery && !$wgOut->mNoGallery;
  82
  83                 $this->clearCategoryState();
  84                 $this->doCategoryQuery();
  85                 $this->finaliseCategoryState();
  86
  87                 $r = $this->getCategoryTop() .
  88                         $this->getSubcategorySection() .
  89                         $this->getPagesSection() .
  90                         $this->getImageSection() .
  91                         $this->getCategoryBottom();
  92
  93                 wfProfileOut( __METHOD__ );
  94                 return $r;
  95         }
  96
  97         function clearCategoryState() {
  98                 $this->articles = array();
  99                 $this->articles_start_char = array();
 100                 $this->children = array();
 101                 $this->children_start_char = array();
 102                 if( $this->showGallery ) {
 103                         $this->gallery = new ImageGallery();
 104                         $this->gallery->setParsing();
 105                 }
 106         }
 107
 108         function getSkin() {
 109                 if ( !$this->skin ) {
 110                         global $wgUser;
 111                         $this->skin = $wgUser->getSkin();
 112                 }
 113                 return $this->skin;
 114         }
 115
 116         /**
 117          * Add a subcategory to the internal lists
 118          */
 119         function addSubcategory( $title, $sortkey, $pageLength ) {
 120                 global $wgContLang;
 121                 // Subcategory; strip the 'Category' namespace from the link text.
 122                 $this->children[] = $this->getSkin()->makeKnownLinkObj(
 123                         $title, $wgContLang->convertHtml( $title->getText() ) );
 124
 125                 $this->children_start_char[] = $this->getSubcategorySortChar( $title, $sortkey );
 126         }
 127
 128         /**
 129         * Get the character to be used for sorting subcategories.
 130         * If there's a link from Category:A to Category:B, the sortkey of the resulting
 131         * entry in the categorylinks table is Category:A, not A, which it SHOULD be.
 132         * Workaround: If sortkey == "Category:".$title, than use $title for sorting,
 133         * else use sortkey...
 134         */
 135         function getSubcategorySortChar( $title, $sortkey ) {
 136                 global $wgContLang;
 137
 138                 if( $title->getPrefixedText() == $sortkey ) {
 139                         $firstChar = $wgContLang->firstChar( $title->getDBkey() );
 140                 } else {
 141                         $firstChar = $wgContLang->firstChar( $sortkey );
 142                 }
 143
 144                 return $wgContLang->convert( $firstChar );
 145         }
 146
 147         /**
 148          * Add a page in the image namespace
 149          */
 150         function addImage( $title, $sortkey, $pageLength ) {
 151                 if ( $this->showGallery ) {
 152                         $image = new Image( $title );
 153                         if( $this->flip ) {
 154                                 $this->gallery->insert( $image );
 155                         } else {
 156                                 $this->gallery->add( $image );
 157                         }
 158                 } else {
 159                         $this->addPage( $title, $sortkey, $pageLength );
 160                 }
 161         }
 162
 163         /**
 164          * Add a miscellaneous page
 165          */
 166         function addPage( $title, $sortkey, $pageLength ) {
 167                 global $wgContLang;
 168                 $this->articles[] = $this->getSkin()->makeSizeLinkObj(
 169                         $pageLength, $title, $wgContLang->convert( $title->getPrefixedText() )
 170                 );
 171                 $this->articles_start_char[] = $wgContLang->convert( $wgContLang->firstChar( $sortkey ) );
 172         }
 173
 174         function finaliseCategoryState() {
 175                 if( $this->flip ) {
 176                         $this->children            = array_reverse( $this->children );
 177                         $this->children_start_char = array_reverse( $this->children_start_char );
 178                         $this->articles            = array_reverse( $this->articles );
 179                         $this->articles_start_char = array_reverse( $this->articles_start_char );
 180                 }
 181         }
 182
 183         function doCategoryQuery() {
 184                 $dbr = wfGetDB( DB_SLAVE );
 185                 if( $this->from != '' ) {
 186                         $pageCondition = 'cl_sortkey >= ' . $dbr->addQuotes( $this->from );
 187                         $this->flip = false;
 188                 } elseif( $this->until != '' ) {
 189                         $pageCondition = 'cl_sortkey < ' . $dbr->addQuotes( $this->until );
 190                         $this->flip = true;
 191                 } else {
 192                         $pageCondition = '1 = 1';
 193                         $this->flip = false;
 194                 }
 195                 $res = $dbr->select(
 196                         array( 'page', 'categorylinks' ),
 197                         array( 'page_title', 'page_namespace', 'page_len', 'cl_sortkey' ),
 198                         array( $pageCondition,
 199                                'cl_from          =  page_id',
 200                                'cl_to'           => $this->title->getDBKey()),
 201                                #'page_is_redirect' => 0),
 202                         #+ $pageCondition,
 203                         __METHOD__,
 204                         array( 'ORDER BY' => $this->flip ? 'cl_sortkey DESC' : 'cl_sortkey',
 205                                'LIMIT'    => $this->limit + 1 ) );
 206
 207                 $count = 0;
 208                 $this->nextPage = null;
 209                 while( $x = $dbr->fetchObject ( $res ) ) {
 210                         if( ++$count > $this->limit ) {
 211                                 // We've reached the one extra which shows that there are
 212                                 // additional pages to be had. Stop here...
 213                                 $this->nextPage = $x->cl_sortkey;
 214                                 break;
 215                         }
 216
 217                         $title = Title::makeTitle( $x->page_namespace, $x->page_title );
 218
 219                         if( $title->getNamespace() == NS_CATEGORY ) {
 220                                 $this->addSubcategory( $title, $x->cl_sortkey, $x->page_len );
 221                         } elseif( $title->getNamespace() == NS_IMAGE ) {
 222                                 $this->addImage( $title, $x->cl_sortkey, $x->page_len );
 223                         } else {
 224                                 $this->addPage( $title, $x->cl_sortkey, $x->page_len );
 225                         }
 226                 }
 227                 $dbr->freeResult( $res );
 228         }
 229
 230         function getCategoryTop() {
 231                 $r = "<br style=\"clear:both;\"/>\n";
 232                 if( $this->until != '' ) {
 233                         $r .= $this->pagingLinks( $this->title, $this->nextPage, $this->until, $this->limit );
 234                 } elseif( $this->nextPage != '' || $this->from != '' ) {
 235                         $r .= $this->pagingLinks( $this->title, $this->from, $this->nextPage, $this->limit );
 236                 }
 237                 return $r;
 238         }
 239
 240         function getSubcategorySection() {
 241                 # Don't show subcategories section if there are none.
 242                 $r = '';
 243                 $c = count( $this->children );
 244                 if( $c > 0 ) {
 245                         # Showing subcategories
 246                         $r .= "<div id=\"mw-subcategories\">\n";
 247                         $r .= '<h2>' . wfMsg( 'subcategories' ) . "</h2>\n";
 248                         $r .= wfMsgExt( 'subcategorycount', array( 'parse' ), $c );
 249                         $r .= $this->formatList( $this->children, $this->children_start_char );
 250                         $r .= "\n</div>";
 251                 }
 252                 return $r;
 253         }
 254
 255         function getPagesSection() {
 256                 $ti = htmlspecialchars( $this->title->getText() );
 257                 # Don't show articles section if there are none.
 258                 $r = '';
 259                 $c = count( $this->articles );
 260                 if( $c > 0 ) {
 261                         $r = "<div id=\"mw-pages\">\n";
 262                         $r .= '<h2>' . wfMsg( 'category_header', $ti ) . "</h2>\n";
 263                         $r .= wfMsgExt( 'categoryarticlecount', array( 'parse' ), $c );
 264                         $r .= $this->formatList( $this->articles, $this->articles_start_char );
 265                         $r .= "\n</div>";
 266                 }
 267                 return $r;
 268         }
 269
 270         function getImageSection() {
 271                 if( $this->showGallery && ! $this->gallery->isEmpty() ) {
 272                         return "<div id=\"mw-category-media\">\n" .
 273                         '<h2>' . wfMsg( 'category-media-header', htmlspecialchars($this->title->getText()) ) . "</h2>\n" .
 274                         wfMsgExt( 'category-media-count', array( 'parse' ), $this->gallery->count() ) .
 275                         $this->gallery->toHTML() . "\n</div>";
 276                 } else {
 277                         return '';
 278                 }
 279         }
 280
 281         function getCategoryBottom() {
 282                 if( $this->until != '' ) {
 283                         return $this->pagingLinks( $this->title, $this->nextPage, $this->until, $this->limit );
 284                 } elseif( $this->nextPage != '' || $this->from != '' ) {
 285                         return $this->pagingLinks( $this->title, $this->from, $this->nextPage, $this->limit );
 286                 } else {
 287                         return '';
 288                 }
 289         }
 290
 291         /**
 292          * Format a list of articles chunked by letter, either as a
 293          * bullet list or a columnar format, depending on the length.
 294          *
 295          * @param array $articles
 296          * @param array $articles_start_char
 297          * @param int   $cutoff
 298          * @return string
 299          * @private
 300          */
 301         function formatList( $articles, $articles_start_char, $cutoff = 6 ) {
 302                 if ( count ( $articles ) > $cutoff ) {
 303                         return $this->columnList( $articles, $articles_start_char );
 304                 } elseif ( count($articles) > 0) {
 305                         // for short lists of articles in categories.
 306                         return $this->shortList( $articles, $articles_start_char );
 307                 }
 308                 return '';
 309         }
 310
 311         /**
 312          * Format a list of articles chunked by letter in a three-column
 313          * list, ordered vertically.
 314          *
 315          * @param array $articles
 316          * @param array $articles_start_char
 317          * @return string
 318          * @private
 319          */
 320         function columnList( $articles, $articles_start_char ) {
 321                 // divide list into three equal chunks
 322                 $chunk = (int) (count ( $articles ) / 3);
 323
 324                 // get and display header
 325                 $r = '<table width="100%"><tr valign="top">';
 326
 327                 $prev_start_char = 'none';
 328
 329                 // loop through the chunks
 330                 for($startChunk = 0, $endChunk = $chunk, $chunkIndex = 0;
 331                         $chunkIndex < 3;
 332                         $chunkIndex++, $startChunk = $endChunk, $endChunk += $chunk + 1)
 333                 {
 334                         $r .= "<td>\n";
 335                         $atColumnTop = true;
 336
 337                         // output all articles in category
 338                         for ($index = $startChunk ;
 339                                 $index < $endChunk && $index < count($articles);
 340                                 $index++ )
 341                         {
 342                                 // check for change of starting letter or begining of chunk
 343                                 if ( ($index == $startChunk) ||
 344                                          ($articles_start_char[$index] != $articles_start_char[$index - 1]) )
 345
 346                                 {
 347                                         if( $atColumnTop ) {
 348                                                 $atColumnTop = false;
 349                                         } else {
 350                                                 $r .= "</ul>\n";
 351                                         }
 352                                         $cont_msg = "";
 353                                         if ( $articles_start_char[$index] == $prev_start_char )
 354                                                 $cont_msg = wfMsgHtml('listingcontinuesabbrev');
 355                                         $r .= "<h3>" . htmlspecialchars( $articles_start_char[$index] ) . "$cont_msg</h3>\n<ul>";
 356                                         $prev_start_char = $articles_start_char[$index];
 357                                 }
 358
 359                                 $r .= "<li>{$articles[$index]}</li>";
 360                         }
 361                         if( !$atColumnTop ) {
 362                                 $r .= "</ul>\n";
 363                         }
 364                         $r .= "</td>\n";
 365
 366
 367                 }
 368                 $r .= '</tr></table>';
 369                 return $r;
 370         }
 371
 372         /**
 373          * Format a list of articles chunked by letter in a bullet list.
 374          * @param array $articles
 375          * @param array $articles_start_char
 376          * @return string
 377          * @private
 378          */
 379         function shortList( $articles, $articles_start_char ) {
 380                 $r = '<h3>' . htmlspecialchars( $articles_start_char[0] ) . "</h3>\n";
 381                 $r .= '<ul><li>'.$articles[0].'</li>';
 382                 for ($index = 1; $index < count($articles); $index++ )
 383                 {
 384                         if ($articles_start_char[$index] != $articles_start_char[$index - 1])
 385                         {
 386                                 $r .= "</ul><h3>" . htmlspecialchars( $articles_start_char[$index] ) . "</h3>\n<ul>";
 387                         }
 388
 389                         $r .= "<li>{$articles[$index]}</li>";
 390                 }
 391                 $r .= '</ul>';
 392                 return $r;
 393         }
 394
 395         /**
 396          * @param Title  $title
 397          * @param string $first
 398          * @param string $last
 399          * @param int    $limit
 400          * @param array  $query - additional query options to pass
 401          * @return string
 402          * @private
 403          */
 404         function pagingLinks( $title, $first, $last, $limit, $query = array() ) {
 405                 global $wgUser, $wgLang;
 406                 $sk = $this->getSkin();
 407                 $limitText = $wgLang->formatNum( $limit );
 408
 409                 $prevLink = htmlspecialchars( wfMsg( 'prevn', $limitText ) );
 410                 if( $first != '' ) {
 411                         $prevLink = $sk->makeLinkObj( $title, $prevLink,
 412                                 wfArrayToCGI( $query + array( 'until' => $first ) ) );
 413                 }
 414                 $nextLink = htmlspecialchars( wfMsg( 'nextn', $limitText ) );
 415                 if( $last != '' ) {
 416                         $nextLink = $sk->makeLinkObj( $title, $nextLink,
 417                                 wfArrayToCGI( $query + array( 'from' => $last ) ) );
 418                 }
 419
 420                 return "($prevLink) ($nextLink)";
 421         }
 422 }
 423
 424
 425 ?>