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 $title, $sortkey, $pageLength, $isRedirect = false ) {
 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, $isRedirect );
 160                 }
 161         }
 162
 163         /**
 164          * Add a miscellaneous page
 165          */
 166         function addPage( $title, $sortkey, $pageLength, $isRedirect = false ) {
 167                 global $wgContLang;
 168                 $link = $this->getSkin()->makeSizeLinkObj(
 169                         $pageLength, $title, $wgContLang->convert( $title->getPrefixedText() )
 170                 );
 171                 if ($isRedirect)
 172                         $link = '<span class="redirect-in-category">'.$link.'</span>';
 173                 $this->articles[] = $link;
 174                 $this->articles_start_char[] = $wgContLang->convert( $wgContLang->firstChar( $sortkey ) );
 175         }
 176
 177         function finaliseCategoryState() {
 178                 if( $this->flip ) {
 179                         $this->children            = array_reverse( $this->children );
 180                         $this->children_start_char = array_reverse( $this->children_start_char );
 181                         $this->articles            = array_reverse( $this->articles );
 182                         $this->articles_start_char = array_reverse( $this->articles_start_char );
 183                 }
 184         }
 185
 186         function doCategoryQuery() {
 187                 $dbr = wfGetDB( DB_SLAVE );
 188                 if( $this->from != '' ) {
 189                         $pageCondition = 'cl_sortkey >= ' . $dbr->addQuotes( $this->from );
 190                         $this->flip = false;
 191                 } elseif( $this->until != '' ) {
 192                         $pageCondition = 'cl_sortkey < ' . $dbr->addQuotes( $this->until );
 193                         $this->flip = true;
 194                 } else {
 195                         $pageCondition = '1 = 1';
 196                         $this->flip = false;
 197                 }
 198                 $res = $dbr->select(
 199                         array( 'page', 'categorylinks' ),
 200                         array( 'page_title', 'page_namespace', 'page_len', 'page_is_redirect', 'cl_sortkey' ),
 201                         array( $pageCondition,
 202                                'cl_from          =  page_id',
 203                                'cl_to'           => $this->title->getDBKey()),
 204                                #'page_is_redirect' => 0),
 205                         #+ $pageCondition,
 206                         __METHOD__,
 207                         array( 'ORDER BY' => $this->flip ? 'cl_sortkey DESC' : 'cl_sortkey',
 208                                'USE INDEX' => 'cl_sortkey',
 209                                'LIMIT'    => $this->limit + 1 ) );
 210
 211                 $count = 0;
 212                 $this->nextPage = null;
 213                 while( $x = $dbr->fetchObject ( $res ) ) {
 214                         if( ++$count > $this->limit ) {
 215                                 // We've reached the one extra which shows that there are
 216                                 // additional pages to be had. Stop here...
 217                                 $this->nextPage = $x->cl_sortkey;
 218                                 break;
 219                         }
 220
 221                         $title = Title::makeTitle( $x->page_namespace, $x->page_title );
 222
 223                         if( $title->getNamespace() == NS_CATEGORY ) {
 224                                 $this->addSubcategory( $title, $x->cl_sortkey, $x->page_len );
 225                         } elseif( $this->showGallery && $title->getNamespace() == NS_IMAGE ) {
 226                                 $this->addImage( $title, $x->cl_sortkey, $x->page_len, $x->page_is_redirect );
 227                         } else {
 228                                 $this->addPage( $title, $x->cl_sortkey, $x->page_len, $x->page_is_redirect );
 229                         }
 230                 }
 231                 $dbr->freeResult( $res );
 232         }
 233
 234         function getCategoryTop() {
 235                 $r = "<br style=\"clear:both;\"/>\n";
 236                 if( $this->until != '' ) {
 237                         $r .= $this->pagingLinks( $this->title, $this->nextPage, $this->until, $this->limit );
 238                 } elseif( $this->nextPage != '' || $this->from != '' ) {
 239                         $r .= $this->pagingLinks( $this->title, $this->from, $this->nextPage, $this->limit );
 240                 }
 241                 return $r;
 242         }
 243
 244         function getSubcategorySection() {
 245                 # Don't show subcategories section if there are none.
 246                 $r = '';
 247                 $c = count( $this->children );
 248                 if( $c > 0 ) {
 249                         # Showing subcategories
 250                         $r .= "<div id=\"mw-subcategories\">\n";
 251                         $r .= '<h2>' . wfMsg( 'subcategories' ) . "</h2>\n";
 252                         $r .= wfMsgExt( 'subcategorycount', array( 'parse' ), $c );
 253                         $r .= $this->formatList( $this->children, $this->children_start_char );
 254                         $r .= "\n</div>";
 255                 }
 256                 return $r;
 257         }
 258
 259         function getPagesSection() {
 260                 $ti = htmlspecialchars( $this->title->getText() );
 261                 # Don't show articles section if there are none.
 262                 $r = '';
 263                 $c = count( $this->articles );
 264                 if( $c > 0 ) {
 265                         $r = "<div id=\"mw-pages\">\n";
 266                         $r .= '<h2>' . wfMsg( 'category_header', $ti ) . "</h2>\n";
 267                         $r .= wfMsgExt( 'categoryarticlecount', array( 'parse' ), $c );
 268                         $r .= $this->formatList( $this->articles, $this->articles_start_char );
 269                         $r .= "\n</div>";
 270                 }
 271                 return $r;
 272         }
 273
 274         function getImageSection() {
 275                 if( $this->showGallery && ! $this->gallery->isEmpty() ) {
 276                         return "<div id=\"mw-category-media\">\n" .
 277                         '<h2>' . wfMsg( 'category-media-header', htmlspecialchars($this->title->getText()) ) . "</h2>\n" .
 278                         wfMsgExt( 'category-media-count', array( 'parse' ), $this->gallery->count() ) .
 279                         $this->gallery->toHTML() . "\n</div>";
 280                 } else {
 281                         return '';
 282                 }
 283         }
 284
 285         function getCategoryBottom() {
 286                 if( $this->until != '' ) {
 287                         return $this->pagingLinks( $this->title, $this->nextPage, $this->until, $this->limit );
 288                 } elseif( $this->nextPage != '' || $this->from != '' ) {
 289                         return $this->pagingLinks( $this->title, $this->from, $this->nextPage, $this->limit );
 290                 } else {
 291                         return '';
 292                 }
 293         }
 294
 295         /**
 296          * Format a list of articles chunked by letter, either as a
 297          * bullet list or a columnar format, depending on the length.
 298          *
 299          * @param array $articles
 300          * @param array $articles_start_char
 301          * @param int   $cutoff
 302          * @return string
 303          * @private
 304          */
 305         function formatList( $articles, $articles_start_char, $cutoff = 6 ) {
 306                 if ( count ( $articles ) > $cutoff ) {
 307                         return $this->columnList( $articles, $articles_start_char );
 308                 } elseif ( count($articles) > 0) {
 309                         // for short lists of articles in categories.
 310                         return $this->shortList( $articles, $articles_start_char );
 311                 }
 312                 return '';
 313         }
 314
 315         /**
 316          * Format a list of articles chunked by letter in a three-column
 317          * list, ordered vertically.
 318          *
 319          * @param array $articles
 320          * @param array $articles_start_char
 321          * @return string
 322          * @private
 323          */
 324         function columnList( $articles, $articles_start_char ) {
 325                 // divide list into three equal chunks
 326                 $chunk = (int) (count ( $articles ) / 3);
 327
 328                 // get and display header
 329                 $r = '<table width="100%"><tr valign="top">';
 330
 331                 $prev_start_char = 'none';
 332
 333                 // loop through the chunks
 334                 for($startChunk = 0, $endChunk = $chunk, $chunkIndex = 0;
 335                         $chunkIndex < 3;
 336                         $chunkIndex++, $startChunk = $endChunk, $endChunk += $chunk + 1)
 337                 {
 338                         $r .= "<td>\n";
 339                         $atColumnTop = true;
 340
 341                         // output all articles in category
 342                         for ($index = $startChunk ;
 343                                 $index < $endChunk && $index < count($articles);
 344                                 $index++ )
 345                         {
 346                                 // check for change of starting letter or begining of chunk
 347                                 if ( ($index == $startChunk) ||
 348                                          ($articles_start_char[$index] != $articles_start_char[$index - 1]) )
 349
 350                                 {
 351                                         if( $atColumnTop ) {
 352                                                 $atColumnTop = false;
 353                                         } else {
 354                                                 $r .= "</ul>\n";
 355                                         }
 356                                         $cont_msg = "";
 357                                         if ( $articles_start_char[$index] == $prev_start_char )
 358                                                 $cont_msg = wfMsgHtml('listingcontinuesabbrev');
 359                                         $r .= "<h3>" . htmlspecialchars( $articles_start_char[$index] ) . "$cont_msg</h3>\n<ul>";
 360                                         $prev_start_char = $articles_start_char[$index];
 361                                 }
 362
 363                                 $r .= "<li>{$articles[$index]}</li>";
 364                         }
 365                         if( !$atColumnTop ) {
 366                                 $r .= "</ul>\n";
 367                         }
 368                         $r .= "</td>\n";
 369
 370
 371                 }
 372                 $r .= '</tr></table>';
 373                 return $r;
 374         }
 375
 376         /**
 377          * Format a list of articles chunked by letter in a bullet list.
 378          * @param array $articles
 379          * @param array $articles_start_char
 380          * @return string
 381          * @private
 382          */
 383         function shortList( $articles, $articles_start_char ) {
 384                 $r = '<h3>' . htmlspecialchars( $articles_start_char[0] ) . "</h3>\n";
 385                 $r .= '<ul><li>'.$articles[0].'</li>';
 386                 for ($index = 1; $index < count($articles); $index++ )
 387                 {
 388                         if ($articles_start_char[$index] != $articles_start_char[$index - 1])
 389                         {
 390                                 $r .= "</ul><h3>" . htmlspecialchars( $articles_start_char[$index] ) . "</h3>\n<ul>";
 391                         }
 392
 393                         $r .= "<li>{$articles[$index]}</li>";
 394                 }
 395                 $r .= '</ul>';
 396                 return $r;
 397         }
 398
 399         /**
 400          * @param Title  $title
 401          * @param string $first
 402          * @param string $last
 403          * @param int    $limit
 404          * @param array  $query - additional query options to pass
 405          * @return string
 406          * @private
 407          */
 408         function pagingLinks( $title, $first, $last, $limit, $query = array() ) {
 409                 global $wgUser, $wgLang;
 410                 $sk = $this->getSkin();
 411                 $limitText = $wgLang->formatNum( $limit );
 412
 413                 $prevLink = htmlspecialchars( wfMsg( 'prevn', $limitText ) );
 414                 if( $first != '' ) {
 415                         $prevLink = $sk->makeLinkObj( $title, $prevLink,
 416                                 wfArrayToCGI( $query + array( 'until' => $first ) ) );
 417                 }
 418                 $nextLink = htmlspecialchars( wfMsg( 'nextn', $limitText ) );
 419                 if( $last != '' ) {
 420                         $nextLink = $sk->makeLinkObj( $title, $nextLink,
 421                                 wfArrayToCGI( $query + array( 'from' => $last ) ) );
 422                 }
 423
 424                 return "($prevLink) ($nextLink)";
 425         }
 426 }
 427
 428
 429