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                 // Give a proper message if category is empty
  94                 if ( $r == '' ) {
  95                         $r = wfMsgExt( 'category-empty', array( 'parse' ) );
  96                 }
  97
  98                 wfProfileOut( __METHOD__ );
  99                 return $r;
 100         }
 101
 102         function clearCategoryState() {
 103                 $this->articles = array();
 104                 $this->articles_start_char = array();
 105                 $this->children = array();
 106                 $this->children_start_char = array();
 107                 if( $this->showGallery ) {
 108                         $this->gallery = new ImageGallery();
 109                         $this->gallery->setParsing();
 110                 }
 111         }
 112
 113         function getSkin() {
 114                 if ( !$this->skin ) {
 115                         global $wgUser;
 116                         $this->skin = $wgUser->getSkin();
 117                 }
 118                 return $this->skin;
 119         }
 120
 121         /**
 122          * Add a subcategory to the internal lists
 123          */
 124         function addSubcategory( $title, $sortkey, $pageLength ) {
 125                 global $wgContLang;
 126                 // Subcategory; strip the 'Category' namespace from the link text.
 127                 $this->children[] = $this->getSkin()->makeKnownLinkObj(
 128                         $title, $wgContLang->convertHtml( $title->getText() ) );
 129
 130                 $this->children_start_char[] = $this->getSubcategorySortChar( $title, $sortkey );
 131         }
 132
 133         /**
 134         * Get the character to be used for sorting subcategories.
 135         * If there's a link from Category:A to Category:B, the sortkey of the resulting
 136         * entry in the categorylinks table is Category:A, not A, which it SHOULD be.
 137         * Workaround: If sortkey == "Category:".$title, than use $title for sorting,
 138         * else use sortkey...
 139         */
 140         function getSubcategorySortChar( $title, $sortkey ) {
 141                 global $wgContLang;
 142
 143                 if( $title->getPrefixedText() == $sortkey ) {
 144                         $firstChar = $wgContLang->firstChar( $title->getDBkey() );
 145                 } else {
 146                         $firstChar = $wgContLang->firstChar( $sortkey );
 147                 }
 148
 149                 return $wgContLang->convert( $firstChar );
 150         }
 151
 152         /**
 153          * Add a page in the image namespace
 154          */
 155         function addImage( Title $title, $sortkey, $pageLength, $isRedirect = false ) {
 156                 if ( $this->showGallery ) {
 157                         $image = new Image( $title );
 158                         if( $this->flip ) {
 159                                 $this->gallery->insert( $image );
 160                         } else {
 161                                 $this->gallery->add( $image );
 162                         }
 163                 } else {
 164                         $this->addPage( $title, $sortkey, $pageLength, $isRedirect );
 165                 }
 166         }
 167
 168         /**
 169          * Add a miscellaneous page
 170          */
 171         function addPage( $title, $sortkey, $pageLength, $isRedirect = false ) {
 172                 global $wgContLang;
 173                 $this->articles[] = $isRedirect
 174                         ? '<span class="redirect-in-category">' . $this->getSkin()->makeKnownLinkObj( $title ) . '</span>'
 175                         : $this->getSkin()->makeSizeLinkObj( $pageLength, $title );
 176                 $this->articles_start_char[] = $wgContLang->convert( $wgContLang->firstChar( $sortkey ) );
 177         }
 178
 179         function finaliseCategoryState() {
 180                 if( $this->flip ) {
 181                         $this->children            = array_reverse( $this->children );
 182                         $this->children_start_char = array_reverse( $this->children_start_char );
 183                         $this->articles            = array_reverse( $this->articles );
 184                         $this->articles_start_char = array_reverse( $this->articles_start_char );
 185                 }
 186         }
 187
 188         function doCategoryQuery() {
 189                 $dbr = wfGetDB( DB_SLAVE );
 190                 if( $this->from != '' ) {
 191                         $pageCondition = 'cl_sortkey >= ' . $dbr->addQuotes( $this->from );
 192                         $this->flip = false;
 193                 } elseif( $this->until != '' ) {
 194                         $pageCondition = 'cl_sortkey < ' . $dbr->addQuotes( $this->until );
 195                         $this->flip = true;
 196                 } else {
 197                         $pageCondition = '1 = 1';
 198                         $this->flip = false;
 199                 }
 200                 $res = $dbr->select(
 201                         array( 'page', 'categorylinks' ),
 202                         array( 'page_title', 'page_namespace', 'page_len', 'page_is_redirect', 'cl_sortkey' ),
 203                         array( $pageCondition,
 204                                'cl_from          =  page_id',
 205                                'cl_to'           => $this->title->getDBKey()),
 206                                #'page_is_redirect' => 0),
 207                         #+ $pageCondition,
 208                         __METHOD__,
 209                         array( 'ORDER BY' => $this->flip ? 'cl_sortkey DESC' : 'cl_sortkey',
 210                                'USE INDEX' => 'cl_sortkey',
 211                                'LIMIT'    => $this->limit + 1 ) );
 212
 213                 $count = 0;
 214                 $this->nextPage = null;
 215                 while( $x = $dbr->fetchObject ( $res ) ) {
 216                         if( ++$count > $this->limit ) {
 217                                 // We've reached the one extra which shows that there are
 218                                 // additional pages to be had. Stop here...
 219                                 $this->nextPage = $x->cl_sortkey;
 220                                 break;
 221                         }
 222
 223                         $title = Title::makeTitle( $x->page_namespace, $x->page_title );
 224
 225                         if( $title->getNamespace() == NS_CATEGORY ) {
 226                                 $this->addSubcategory( $title, $x->cl_sortkey, $x->page_len );
 227                         } elseif( $this->showGallery && $title->getNamespace() == NS_IMAGE ) {
 228                                 $this->addImage( $title, $x->cl_sortkey, $x->page_len, $x->page_is_redirect );
 229                         } else {
 230                                 $this->addPage( $title, $x->cl_sortkey, $x->page_len, $x->page_is_redirect );
 231                         }
 232                 }
 233                 $dbr->freeResult( $res );
 234         }
 235
 236         function getCategoryTop() {
 237                 $r = '';
 238                 if( $this->until != '' ) {
 239                         $r .= $this->pagingLinks( $this->title, $this->nextPage, $this->until, $this->limit );
 240                 } elseif( $this->nextPage != '' || $this->from != '' ) {
 241                         $r .= $this->pagingLinks( $this->title, $this->from, $this->nextPage, $this->limit );
 242                 }
 243                 return $r == ''
 244                         ? $r
 245                         : "<br style=\"clear:both;\"/>\n" . $r;
 246         }
 247
 248         function getSubcategorySection() {
 249                 # Don't show subcategories section if there are none.
 250                 $r = '';
 251                 $c = count( $this->children );
 252                 if( $c > 0 ) {
 253                         # Showing subcategories
 254                         $r .= "<div id=\"mw-subcategories\">\n";
 255                         $r .= '<h2>' . wfMsg( 'subcategories' ) . "</h2>\n";
 256                         $r .= wfMsgExt( 'subcategorycount', array( 'parse' ), $c );
 257                         $r .= $this->formatList( $this->children, $this->children_start_char );
 258                         $r .= "\n</div>";
 259                 }
 260                 return $r;
 261         }
 262
 263         function getPagesSection() {
 264                 $ti = htmlspecialchars( $this->title->getText() );
 265                 # Don't show articles section if there are none.
 266                 $r = '';
 267                 $c = count( $this->articles );
 268                 if( $c > 0 ) {
 269                         $r = "<div id=\"mw-pages\">\n";
 270                         $r .= '<h2>' . wfMsg( 'category_header', $ti ) . "</h2>\n";
 271                         $r .= wfMsgExt( 'categoryarticlecount', array( 'parse' ), $c );
 272                         $r .= $this->formatList( $this->articles, $this->articles_start_char );
 273                         $r .= "\n</div>";
 274                 }
 275                 return $r;
 276         }
 277
 278         function getImageSection() {
 279                 if( $this->showGallery && ! $this->gallery->isEmpty() ) {
 280                         return "<div id=\"mw-category-media\">\n" .
 281                         '<h2>' . wfMsg( 'category-media-header', htmlspecialchars($this->title->getText()) ) . "</h2>\n" .
 282                         wfMsgExt( 'category-media-count', array( 'parse' ), $this->gallery->count() ) .
 283                         $this->gallery->toHTML() . "\n</div>";
 284                 } else {
 285                         return '';
 286                 }
 287         }
 288
 289         function getCategoryBottom() {
 290                 if( $this->until != '' ) {
 291                         return $this->pagingLinks( $this->title, $this->nextPage, $this->until, $this->limit );
 292                 } elseif( $this->nextPage != '' || $this->from != '' ) {
 293                         return $this->pagingLinks( $this->title, $this->from, $this->nextPage, $this->limit );
 294                 } else {
 295                         return '';
 296                 }
 297         }
 298
 299         /**
 300          * Format a list of articles chunked by letter, either as a
 301          * bullet list or a columnar format, depending on the length.
 302          *
 303          * @param array $articles
 304          * @param array $articles_start_char
 305          * @param int   $cutoff
 306          * @return string
 307          * @private
 308          */
 309         function formatList( $articles, $articles_start_char, $cutoff = 6 ) {
 310                 if ( count ( $articles ) > $cutoff ) {
 311                         return $this->columnList( $articles, $articles_start_char );
 312                 } elseif ( count($articles) > 0) {
 313                         // for short lists of articles in categories.
 314                         return $this->shortList( $articles, $articles_start_char );
 315                 }
 316                 return '';
 317         }
 318
 319         /**
 320          * Format a list of articles chunked by letter in a three-column
 321          * list, ordered vertically.
 322          *
 323          * @param array $articles
 324          * @param array $articles_start_char
 325          * @return string
 326          * @private
 327          */
 328         function columnList( $articles, $articles_start_char ) {
 329                 // divide list into three equal chunks
 330                 $chunk = (int) (count ( $articles ) / 3);
 331
 332                 // get and display header
 333                 $r = '<table width="100%"><tr valign="top">';
 334
 335                 $prev_start_char = 'none';
 336
 337                 // loop through the chunks
 338                 for($startChunk = 0, $endChunk = $chunk, $chunkIndex = 0;
 339                         $chunkIndex < 3;
 340                         $chunkIndex++, $startChunk = $endChunk, $endChunk += $chunk + 1)
 341                 {
 342                         $r .= "<td>\n";
 343                         $atColumnTop = true;
 344
 345                         // output all articles in category
 346                         for ($index = $startChunk ;
 347                                 $index < $endChunk && $index < count($articles);
 348                                 $index++ )
 349                         {
 350                                 // check for change of starting letter or begining of chunk
 351                                 if ( ($index == $startChunk) ||
 352                                          ($articles_start_char[$index] != $articles_start_char[$index - 1]) )
 353
 354                                 {
 355                                         if( $atColumnTop ) {
 356                                                 $atColumnTop = false;
 357                                         } else {
 358                                                 $r .= "</ul>\n";
 359                                         }
 360                                         $cont_msg = "";
 361                                         if ( $articles_start_char[$index] == $prev_start_char )
 362                                                 $cont_msg = ' ' . wfMsgHtml( 'listingcontinuesabbrev' );
 363                                         $r .= "<h3>" . htmlspecialchars( $articles_start_char[$index] ) . "$cont_msg</h3>\n<ul>";
 364                                         $prev_start_char = $articles_start_char[$index];
 365                                 }
 366
 367                                 $r .= "<li>{$articles[$index]}</li>";
 368                         }
 369                         if( !$atColumnTop ) {
 370                                 $r .= "</ul>\n";
 371                         }
 372                         $r .= "</td>\n";
 373
 374
 375                 }
 376                 $r .= '</tr></table>';
 377                 return $r;
 378         }
 379
 380         /**
 381          * Format a list of articles chunked by letter in a bullet list.
 382          * @param array $articles
 383          * @param array $articles_start_char
 384          * @return string
 385          * @private
 386          */
 387         function shortList( $articles, $articles_start_char ) {
 388                 $r = '<h3>' . htmlspecialchars( $articles_start_char[0] ) . "</h3>\n";
 389                 $r .= '<ul><li>'.$articles[0].'</li>';
 390                 for ($index = 1; $index < count($articles); $index++ )
 391                 {
 392                         if ($articles_start_char[$index] != $articles_start_char[$index - 1])
 393                         {
 394                                 $r .= "</ul><h3>" . htmlspecialchars( $articles_start_char[$index] ) . "</h3>\n<ul>";
 395                         }
 396
 397                         $r .= "<li>{$articles[$index]}</li>";
 398                 }
 399                 $r .= '</ul>';
 400                 return $r;
 401         }
 402
 403         /**
 404          * @param Title  $title
 405          * @param string $first
 406          * @param string $last
 407          * @param int    $limit
 408          * @param array  $query - additional query options to pass
 409          * @return string
 410          * @private
 411          */
 412         function pagingLinks( $title, $first, $last, $limit, $query = array() ) {
 413                 global $wgUser, $wgLang;
 414                 $sk = $this->getSkin();
 415                 $limitText = $wgLang->formatNum( $limit );
 416
 417                 $prevLink = htmlspecialchars( wfMsg( 'prevn', $limitText ) );
 418                 if( $first != '' ) {
 419                         $prevLink = $sk->makeLinkObj( $title, $prevLink,
 420                                 wfArrayToCGI( $query + array( 'until' => $first ) ) );
 421                 }
 422                 $nextLink = htmlspecialchars( wfMsg( 'nextn', $limitText ) );
 423                 if( $last != '' ) {
 424                         $nextLink = $sk->makeLinkObj( $title, $nextLink,
 425                                 wfArrayToCGI( $query + array( 'from' => $last ) ) );
 426                 }
 427
 428                 return "($prevLink) ($nextLink)";
 429         }
 430 }
 431
 432
 433