summaryrefslogtreecommitdiff
path: root/includes/CategoryViewer.php
blob: 3bb2bc9b1cb36b2e234f3f181a99baaf3f1b22cf (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
<?php
/**
 * List and paging of category members.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 */

class CategoryViewer extends ContextSource {
	var $limit, $from, $until,
		$articles, $articles_start_char,
		$children, $children_start_char,
		$showGallery, $imgsNoGalley,
		$imgsNoGallery_start_char,
		$imgsNoGallery;

	/**
	 * @var Array
	 */
	var $nextPage;

	/**
	 * @var Array
	 */
	var $flip;

	/**
	 * @var Title
	 */
	var $title;

	/**
	 * @var Collation
	 */
	var $collation;

	/**
	 * @var ImageGallery
	 */
	var $gallery;

	/**
	 * Category object for this page
	 * @var Category
	 */
	private $cat;

	/**
	 * The original query array, to be used in generating paging links.
	 * @var array
	 */
	private $query;

	/**
	 * Constructor
	 *
	 * @since 1.19 $context is a second, required parameter
	 * @param $title Title
	 * @param $context IContextSource
	 * @param $from String
	 * @param $until String
	 * @param $query Array
	 */
	function __construct( $title, IContextSource $context, $from = '', $until = '', $query = array() ) {
		global $wgCategoryPagingLimit;
		$this->title = $title;
		$this->setContext( $context );
		$this->from = $from;
		$this->until = $until;
		$this->limit = $wgCategoryPagingLimit;
		$this->cat = Category::newFromTitle( $title );
		$this->query = $query;
		$this->collation = Collation::singleton();
		unset( $this->query['title'] );
	}

	/**
	 * Format the category data list.
	 *
	 * @return string HTML output
	 */
	public function getHTML() {
		global $wgCategoryMagicGallery;
		wfProfileIn( __METHOD__ );

		$this->showGallery = $wgCategoryMagicGallery && !$this->getOutput()->mNoGallery;

		$this->clearCategoryState();
		$this->doCategoryQuery();
		$this->finaliseCategoryState();

		$r = $this->getSubcategorySection() .
			$this->getPagesSection() .
			$this->getImageSection();

		if ( $r == '' ) {
			// If there is no category content to display, only
			// show the top part of the navigation links.
			// @todo FIXME: Cannot be completely suppressed because it
			//        is unknown if 'until' or 'from' makes this
			//        give 0 results.
			$r = $r . $this->getCategoryTop();
		} else {
			$r = $this->getCategoryTop() .
				$r .
				$this->getCategoryBottom();
		}

		// Give a proper message if category is empty
		if ( $r == '' ) {
			$r = $this->msg( 'category-empty' )->parseAsBlock();
		}

		$lang = $this->getLanguage();
		$langAttribs = array( 'lang' => $lang->getCode(), 'dir' => $lang->getDir() );
		# put a div around the headings which are in the user language
		$r = Html::openElement( 'div', $langAttribs ) . $r . '</div>';

		wfProfileOut( __METHOD__ );
		return $r;
	}

	function clearCategoryState() {
		$this->articles = array();
		$this->articles_start_char = array();
		$this->children = array();
		$this->children_start_char = array();
		if ( $this->showGallery ) {
			$this->gallery = new ImageGallery();
			$this->gallery->setHideBadImages();
		} else {
			$this->imgsNoGallery = array();
			$this->imgsNoGallery_start_char = array();
		}
	}

	/**
	 * Add a subcategory to the internal lists, using a Category object
	 * @param $cat Category
	 * @param $sortkey
	 * @param $pageLength
	 */
	function addSubcategoryObject( Category $cat, $sortkey, $pageLength ) {
		// Subcategory; strip the 'Category' namespace from the link text.
		$title = $cat->getTitle();

		$link = Linker::link( $title, htmlspecialchars( $title->getText() ) );
		if ( $title->isRedirect() ) {
			// This didn't used to add redirect-in-category, but might
			// as well be consistent with the rest of the sections
			// on a category page.
			$link = '<span class="redirect-in-category">' . $link . '</span>';
		}
		$this->children[] = $link;

		$this->children_start_char[] =
			$this->getSubcategorySortChar( $cat->getTitle(), $sortkey );
	}

	/**
	 * Add a subcategory to the internal lists, using a title object
	 * @deprecated since 1.17 kept for compatibility, please use addSubcategoryObject instead
	 */
	function addSubcategory( Title $title, $sortkey, $pageLength ) {
		wfDeprecated( __METHOD__, '1.17' );
		$this->addSubcategoryObject( Category::newFromTitle( $title ), $sortkey, $pageLength );
	}

	/**
	* Get the character to be used for sorting subcategories.
	* If there's a link from Category:A to Category:B, the sortkey of the resulting
	* entry in the categorylinks table is Category:A, not A, which it SHOULD be.
	* Workaround: If sortkey == "Category:".$title, than use $title for sorting,
	* else use sortkey...
	*
	* @param Title $title
	* @param string $sortkey The human-readable sortkey (before transforming to icu or whatever).
	 * @return string
	 */
	function getSubcategorySortChar( $title, $sortkey ) {
		global $wgContLang;

		if ( $title->getPrefixedText() == $sortkey ) {
			$word = $title->getDBkey();
		} else {
			$word = $sortkey;
		}

		$firstChar = $this->collation->getFirstLetter( $word );

		return $wgContLang->convert( $firstChar );
	}

	/**
	 * Add a page in the image namespace
	 * @param $title Title
	 * @param $sortkey
	 * @param $pageLength
	 * @param $isRedirect bool
	 */
	function addImage( Title $title, $sortkey, $pageLength, $isRedirect = false ) {
		global $wgContLang;
		if ( $this->showGallery ) {
			$flip = $this->flip['file'];
			if ( $flip ) {
				$this->gallery->insert( $title );
			} else {
				$this->gallery->add( $title );
			}
		} else {
			$link = Linker::link( $title );
			if ( $isRedirect ) {
				// This seems kind of pointless given 'mw-redirect' class,
				// but keeping for back-compatibility with user css.
				$link = '<span class="redirect-in-category">' . $link . '</span>';
			}
			$this->imgsNoGallery[] = $link;

			$this->imgsNoGallery_start_char[] = $wgContLang->convert(
				$this->collation->getFirstLetter( $sortkey ) );
		}
	}

	/**
	 * Add a miscellaneous page
	 * @param $title
	 * @param $sortkey
	 * @param $pageLength
	 * @param $isRedirect bool
	 */
	function addPage( $title, $sortkey, $pageLength, $isRedirect = false ) {
		global $wgContLang;

		$link = Linker::link( $title );
		if ( $isRedirect ) {
			// This seems kind of pointless given 'mw-redirect' class,
			// but keeping for back-compatiability with user css.
			$link = '<span class="redirect-in-category">' . $link . '</span>';
		}
		$this->articles[] = $link;

		$this->articles_start_char[] = $wgContLang->convert(
			$this->collation->getFirstLetter( $sortkey ) );
	}

	function finaliseCategoryState() {
		if ( $this->flip['subcat'] ) {
			$this->children            = array_reverse( $this->children );
			$this->children_start_char = array_reverse( $this->children_start_char );
		}
		if ( $this->flip['page'] ) {
			$this->articles            = array_reverse( $this->articles );
			$this->articles_start_char = array_reverse( $this->articles_start_char );
		}
		if ( !$this->showGallery && $this->flip['file'] ) {
			$this->imgsNoGallery            = array_reverse( $this->imgsNoGallery );
			$this->imgsNoGallery_start_char = array_reverse( $this->imgsNoGallery_start_char );
		}
	}

	function doCategoryQuery() {
		$dbr = wfGetDB( DB_SLAVE, 'category' );

		$this->nextPage = array(
			'page' => null,
			'subcat' => null,
			'file' => null,
		);
		$this->flip = array( 'page' => false, 'subcat' => false, 'file' => false );

		foreach ( array( 'page', 'subcat', 'file' ) as $type ) {
			# Get the sortkeys for start/end, if applicable.  Note that if
			# the collation in the database differs from the one
			# set in $wgCategoryCollation, pagination might go totally haywire.
			$extraConds = array( 'cl_type' => $type );
			if ( $this->from[$type] !== null ) {
				$extraConds[] = 'cl_sortkey >= '
					. $dbr->addQuotes( $this->collation->getSortKey( $this->from[$type] ) );
			} elseif ( $this->until[$type] !== null ) {
				$extraConds[] = 'cl_sortkey < '
					. $dbr->addQuotes( $this->collation->getSortKey( $this->until[$type] ) );
				$this->flip[$type] = true;
			}

			$res = $dbr->select(
				array( 'page', 'categorylinks', 'category' ),
				array( 'page_id', 'page_title', 'page_namespace', 'page_len',
					'page_is_redirect', 'cl_sortkey', 'cat_id', 'cat_title',
					'cat_subcats', 'cat_pages', 'cat_files',
					'cl_sortkey_prefix', 'cl_collation' ),
				array_merge( array( 'cl_to' => $this->title->getDBkey() ),  $extraConds ),
				__METHOD__,
				array(
					'USE INDEX' => array( 'categorylinks' => 'cl_sortkey' ),
					'LIMIT' => $this->limit + 1,
					'ORDER BY' => $this->flip[$type] ? 'cl_sortkey DESC' : 'cl_sortkey',
				),
				array(
					'categorylinks'  => array( 'INNER JOIN', 'cl_from = page_id' ),
					'category' => array( 'LEFT JOIN', 'cat_title = page_title AND page_namespace = ' . NS_CATEGORY )
				)
			);

			$count = 0;
			foreach ( $res as $row ) {
				$title = Title::newFromRow( $row );
				if ( $row->cl_collation === '' ) {
					// Hack to make sure that while updating from 1.16 schema
					// and db is inconsistent, that the sky doesn't fall.
					// See r83544. Could perhaps be removed in a couple decades...
					$humanSortkey = $row->cl_sortkey;
				} else {
					$humanSortkey = $title->getCategorySortkey( $row->cl_sortkey_prefix );
				}

				if ( ++$count > $this->limit ) {
					# We've reached the one extra which shows that there
					# are additional pages to be had. Stop here...
					$this->nextPage[$type] = $humanSortkey;
					break;
				}

				if ( $title->getNamespace() == NS_CATEGORY ) {
					$cat = Category::newFromRow( $row, $title );
					$this->addSubcategoryObject( $cat, $humanSortkey, $row->page_len );
				} elseif ( $title->getNamespace() == NS_FILE ) {
					$this->addImage( $title, $humanSortkey, $row->page_len, $row->page_is_redirect );
				} else {
					$this->addPage( $title, $humanSortkey, $row->page_len, $row->page_is_redirect );
				}
			}
		}
	}

	/**
	 * @return string
	 */
	function getCategoryTop() {
		$r = $this->getCategoryBottom();
		return $r === ''
			? $r
			: "<br style=\"clear:both;\"/>\n" . $r;
	}

	/**
	 * @return string
	 */
	function getSubcategorySection() {
		# Don't show subcategories section if there are none.
		$r = '';
		$rescnt = count( $this->children );
		$dbcnt = $this->cat->getSubcatCount();
		$countmsg = $this->getCountMessage( $rescnt, $dbcnt, 'subcat' );

		if ( $rescnt > 0 ) {
			# Showing subcategories
			$r .= "<div id=\"mw-subcategories\">\n";
			$r .= '<h2>' . $this->msg( 'subcategories' )->text() . "</h2>\n";
			$r .= $countmsg;
			$r .= $this->getSectionPagingLinks( 'subcat' );
			$r .= $this->formatList( $this->children, $this->children_start_char );
			$r .= $this->getSectionPagingLinks( 'subcat' );
			$r .= "\n</div>";
		}
		return $r;
	}

	/**
	 * @return string
	 */
	function getPagesSection() {
		$ti = wfEscapeWikiText( $this->title->getText() );
		# Don't show articles section if there are none.
		$r = '';

		# @todo FIXME: Here and in the other two sections: we don't need to bother
		# with this rigamarole if the entire category contents fit on one page
		# and have already been retrieved.  We can just use $rescnt in that
		# case and save a query and some logic.
		$dbcnt = $this->cat->getPageCount() - $this->cat->getSubcatCount()
			- $this->cat->getFileCount();
		$rescnt = count( $this->articles );
		$countmsg = $this->getCountMessage( $rescnt, $dbcnt, 'article' );

		if ( $rescnt > 0 ) {
			$r = "<div id=\"mw-pages\">\n";
			$r .= '<h2>' . $this->msg( 'category_header', $ti )->text() . "</h2>\n";
			$r .= $countmsg;
			$r .= $this->getSectionPagingLinks( 'page' );
			$r .= $this->formatList( $this->articles, $this->articles_start_char );
			$r .= $this->getSectionPagingLinks( 'page' );
			$r .= "\n</div>";
		}
		return $r;
	}

	/**
	 * @return string
	 */
	function getImageSection() {
		$r = '';
		$rescnt = $this->showGallery ? $this->gallery->count() : count( $this->imgsNoGallery );
		if ( $rescnt > 0 ) {
			$dbcnt = $this->cat->getFileCount();
			$countmsg = $this->getCountMessage( $rescnt, $dbcnt, 'file' );

			$r .= "<div id=\"mw-category-media\">\n";
			$r .= '<h2>' . $this->msg( 'category-media-header', wfEscapeWikiText( $this->title->getText() ) )->text() . "</h2>\n";
			$r .= $countmsg;
			$r .= $this->getSectionPagingLinks( 'file' );
			if ( $this->showGallery ) {
				$r .= $this->gallery->toHTML();
			} else {
				$r .= $this->formatList( $this->imgsNoGallery, $this->imgsNoGallery_start_char );
			}
			$r .= $this->getSectionPagingLinks( 'file' );
			$r .= "\n</div>";
		}
		return $r;
	}

	/**
	 * Get the paging links for a section (subcats/pages/files), to go at the top and bottom
	 * of the output.
	 *
	 * @param $type String: 'page', 'subcat', or 'file'
	 * @return String: HTML output, possibly empty if there are no other pages
	 */
	private function getSectionPagingLinks( $type ) {
		if ( $this->until[$type] !== null ) {
			return $this->pagingLinks( $this->nextPage[$type], $this->until[$type], $type );
		} elseif ( $this->nextPage[$type] !== null || $this->from[$type] !== null ) {
			return $this->pagingLinks( $this->from[$type], $this->nextPage[$type], $type );
		} else {
			return '';
		}
	}

	/**
	 * @return string
	 */
	function getCategoryBottom() {
		return '';
	}

	/**
	 * Format a list of articles chunked by letter, either as a
	 * bullet list or a columnar format, depending on the length.
	 *
	 * @param $articles Array
	 * @param $articles_start_char Array
	 * @param $cutoff Int
	 * @return String
	 * @private
	 */
	function formatList( $articles, $articles_start_char, $cutoff = 6 ) {
		$list = '';
		if ( count ( $articles ) > $cutoff ) {
			$list = self::columnList( $articles, $articles_start_char );
		} elseif ( count( $articles ) > 0 ) {
			// for short lists of articles in categories.
			$list = self::shortList( $articles, $articles_start_char );
		}

		$pageLang = $this->title->getPageLanguage();
		$attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
			'class' => 'mw-content-'.$pageLang->getDir() );
		$list = Html::rawElement( 'div', $attribs, $list );

		return $list;
	}

	/**
	 * Format a list of articles chunked by letter in a three-column
	 * list, ordered vertically.
	 *
	 * TODO: Take the headers into account when creating columns, so they're
	 * more visually equal.
	 *
	 * More distant TODO: Scrap this and use CSS columns, whenever IE finally
	 * supports those.
	 *
	 * @param $articles Array
	 * @param $articles_start_char Array
	 * @return String
	 * @private
	 */
	static function columnList( $articles, $articles_start_char ) {
		$columns = array_combine( $articles, $articles_start_char );
		# Split into three columns
		$columns = array_chunk( $columns, ceil( count( $columns ) / 3 ), true /* preserve keys */ );

		$ret = '<table style="width: 100%;"><tr style="vertical-align: top;">';
		$prevchar = null;

		foreach ( $columns as $column ) {
			$ret .= '<td style="width: 33.3%;">';
			$colContents = array();

			# Kind of like array_flip() here, but we keep duplicates in an
			# array instead of dropping them.
			foreach ( $column as $article => $char ) {
				if ( !isset( $colContents[$char] ) ) {
					$colContents[$char] = array();
				}
				$colContents[$char][] = $article;
			}

			$first = true;
			foreach ( $colContents as $char => $articles ) {
				$ret .= '<h3>' . htmlspecialchars( $char );
				if ( $first && $char === $prevchar ) {
					# We're continuing a previous chunk at the top of a new
					# column, so add " cont." after the letter.
					$ret .= ' ' . wfMessage( 'listingcontinuesabbrev' )->escaped();
				}
				$ret .= "</h3>\n";

				$ret .= '<ul><li>';
				$ret .= implode( "</li>\n<li>", $articles );
				$ret .= '</li></ul>';

				$first = false;
				$prevchar = $char;
			}

			$ret .= "</td>\n";
		}

		$ret .= '</tr></table>';
		return $ret;
	}

	/**
	 * Format a list of articles chunked by letter in a bullet list.
	 * @param $articles Array
	 * @param $articles_start_char Array
	 * @return String
	 * @private
	 */
	static function shortList( $articles, $articles_start_char ) {
		$r = '<h3>' . htmlspecialchars( $articles_start_char[0] ) . "</h3>\n";
		$r .= '<ul><li>' . $articles[0] . '</li>';
		for ( $index = 1; $index < count( $articles ); $index++ ) {
			if ( $articles_start_char[$index] != $articles_start_char[$index - 1] ) {
				$r .= "</ul><h3>" . htmlspecialchars( $articles_start_char[$index] ) . "</h3>\n<ul>";
			}

			$r .= "<li>{$articles[$index]}</li>";
		}
		$r .= '</ul>';
		return $r;
	}

	/**
	 * Create paging links, as a helper method to getSectionPagingLinks().
	 *
	 * @param $first String The 'until' parameter for the generated URL
	 * @param $last String The 'from' parameter for the genererated URL
	 * @param $type String A prefix for parameters, 'page' or 'subcat' or
	 *     'file'
	 * @return String HTML
	 */
	private function pagingLinks( $first, $last, $type = '' ) {
		$prevLink = $this->msg( 'prevn' )->numParams( $this->limit )->escaped();

		if ( $first != '' ) {
			$prevQuery = $this->query;
			$prevQuery["{$type}until"] = $first;
			unset( $prevQuery["{$type}from"] );
			$prevLink = Linker::linkKnown(
				$this->addFragmentToTitle( $this->title, $type ),
				$prevLink,
				array(),
				$prevQuery
			);
		}

		$nextLink = $this->msg( 'nextn' )->numParams( $this->limit )->escaped();

		if ( $last != '' ) {
			$lastQuery = $this->query;
			$lastQuery["{$type}from"] = $last;
			unset( $lastQuery["{$type}until"] );
			$nextLink = Linker::linkKnown(
				$this->addFragmentToTitle( $this->title, $type ),
				$nextLink,
				array(),
				$lastQuery
			);
		}

		return $this->msg('categoryviewer-pagedlinks')->rawParams($prevLink, $nextLink)->escaped();
	}

	/**
	 * Takes a title, and adds the fragment identifier that
	 * corresponds to the correct segment of the category.
	 *
	 * @param Title $title: The title (usually $this->title)
	 * @param String $section: Which section
	 * @return Title
	 */
	private function addFragmentToTitle( $title, $section ) {
		switch ( $section ) {
			case 'page':
				$fragment = 'mw-pages';
				break;
			case 'subcat':
				$fragment = 'mw-subcategories';
				break;
			case 'file':
				$fragment = 'mw-category-media';
				break;
			default:
				throw new MWException( __METHOD__ .
					" Invalid section $section." );
		}

		return Title::makeTitle( $title->getNamespace(),
			$title->getDBkey(), $fragment );
	}
	/**
	 * What to do if the category table conflicts with the number of results
	 * returned?  This function says what. Each type is considered independently
	 * of the other types.
	 *
	 * Note for grepping: uses the messages category-article-count,
	 * category-article-count-limited, category-subcat-count,
	 * category-subcat-count-limited, category-file-count,
	 * category-file-count-limited.
	 *
	 * @param $rescnt Int: The number of items returned by our database query.
	 * @param $dbcnt Int: The number of items according to the category table.
	 * @param $type String: 'subcat', 'article', or 'file'
	 * @return String: A message giving the number of items, to output to HTML.
	 */
	private function getCountMessage( $rescnt, $dbcnt, $type ) {
		# There are three cases:
		#   1) The category table figure seems sane.  It might be wrong, but
		#      we can't do anything about it if we don't recalculate it on ev-
		#      ery category view.
		#   2) The category table figure isn't sane, like it's smaller than the
		#      number of actual results, *but* the number of results is less
		#      than $this->limit and there's no offset.  In this case we still
		#      know the right figure.
		#   3) We have no idea.

		# Check if there's a "from" or "until" for anything

		// This is a little ugly, but we seem to use different names
		// for the paging types then for the messages.
		if ( $type === 'article' ) {
			$pagingType = 'page';
		} else {
			$pagingType = $type;
		}

		$fromOrUntil = false;
		if ( $this->from[$pagingType] !== null || $this->until[$pagingType] !== null ) {
			$fromOrUntil = true;
		}

		if ( $dbcnt == $rescnt || ( ( $rescnt == $this->limit || $fromOrUntil )
			&& $dbcnt > $rescnt ) ) {
			# Case 1: seems sane.
			$totalcnt = $dbcnt;
		} elseif ( $rescnt < $this->limit && !$fromOrUntil ) {
			# Case 2: not sane, but salvageable.  Use the number of results.
			# Since there are fewer than 200, we can also take this opportunity
			# to refresh the incorrect category table entry -- which should be
			# quick due to the small number of entries.
			$totalcnt = $rescnt;
			$this->cat->refreshCounts();
		} else {
			# Case 3: hopeless.  Don't give a total count at all.
			return $this->msg( "category-$type-count-limited" )->numParams( $rescnt )->parseAsBlock();
		}
		return $this->msg( "category-$type-count" )->numParams( $rescnt, $totalcnt )->parseAsBlock();
	}
}