title = $title;
$this->setContext( $context );
$this->from = $from;
$this->until = $until;
$this->limit = $context->getConfig()->get( 'CategoryPagingLimit' );
$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() {
wfProfileIn( __METHOD__ );
$this->showGallery = $this->getConfig()->get( 'CategoryMagicGallery' )
&& !$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 . '';
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 ) {
// Note that null for mode is taken to mean use default.
$mode = $this->getRequest()->getVal( 'gallerymode', null );
try {
$this->gallery = ImageGalleryBase::factory( $mode, $this->getContext() );
} catch ( MWException $e ) {
// User specified something invalid, fallback to default.
$this->gallery = ImageGalleryBase::factory( false, $this->getContext() );
}
$this->gallery->setHideBadImages();
} else {
$this->imgsNoGallery = array();
$this->imgsNoGallery_start_char = array();
}
}
/**
* Add a subcategory to the internal lists, using a Category object
* @param Category $cat
* @param string $sortkey
* @param int $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 = '' . $link . '';
}
$this->children[] = $link;
$this->children_start_char[] =
$this->getSubcategorySortChar( $cat->getTitle(), $sortkey );
}
/**
* Get the character to be used for sorting subcategories.
* If there's a link from Category:A to Category:B, the sortkey of the resulting
* entry in the categorylinks table is Category:A, not A, which it SHOULD be.
* Workaround: If sortkey == "Category:".$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 string $sortkey
* @param int $pageLength
* @param bool $isRedirect
*/
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 = '' . $link . '';
}
$this->imgsNoGallery[] = $link;
$this->imgsNoGallery_start_char[] = $wgContLang->convert(
$this->collation->getFirstLetter( $sortkey ) );
}
}
/**
* Add a miscellaneous page
* @param Title $title
* @param string $sortkey
* @param int $pageLength
* @param bool $isRedirect
*/
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-compatibility with user css.
$link = '' . $link . '';
}
$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->prevPage = 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 ( isset( $this->from[$type] ) && $this->from[$type] !== null ) {
$extraConds[] = 'cl_sortkey >= '
. $dbr->addQuotes( $this->collation->getSortKey( $this->from[$type] ) );
} elseif ( isset( $this->until[$type] ) && $this->until[$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', array(
'cat_title = page_title',
'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 ( $count == $this->limit ) {
$this->prevPage[$type] = $humanSortkey;
}
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
: "
\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 .= "\n";
$r .= '
' . $this->msg( 'subcategories' )->text() . "
\n";
$r .= $countmsg;
$r .= $this->getSectionPagingLinks( 'subcat' );
$r .= $this->formatList( $this->children, $this->children_start_char );
$r .= $this->getSectionPagingLinks( 'subcat' );
$r .= "\n";
}
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 rigmarole 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 = "\n";
$r .= '
' . $this->msg( 'category_header', $ti )->text() . "
\n";
$r .= $countmsg;
$r .= $this->getSectionPagingLinks( 'page' );
$r .= $this->formatList( $this->articles, $this->articles_start_char );
$r .= $this->getSectionPagingLinks( 'page' );
$r .= "\n";
}
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 .= "\n";
$r .= '
' .
$this->msg(
'category-media-header',
wfEscapeWikiText( $this->title->getText() )
)->text() .
"
\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";
}
return $r;
}
/**
* Get the paging links for a section (subcats/pages/files), to go at the top and bottom
* of the output.
*
* @param string $type 'page', 'subcat', or 'file'
* @return string HTML output, possibly empty if there are no other pages
*/
private function getSectionPagingLinks( $type ) {
if ( isset( $this->until[$type] ) && $this->until[$type] !== null ) {
// The new value for the until parameter should be pointing to the first
// result displayed on the page which is the second last result retrieved
// from the database.The next link should have a from parameter pointing
// to the until parameter of the current page.
if ( $this->nextPage[$type] !== null ) {
return $this->pagingLinks( $this->prevPage[$type], $this->until[$type], $type );
} else {
// If the nextPage variable is null, it means that we have reached the first page
// and therefore the previous link should be disabled.
return $this->pagingLinks( null, $this->until[$type], $type );
}
} elseif ( $this->nextPage[$type] !== null
|| ( isset( $this->from[$type] ) && $this->from[$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 array $articles
* @param array $articles_start_char
* @param int $cutoff
* @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 array $articles
* @param string[] $articles_start_char
* @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 = '';
$prevchar = null;
foreach ( $columns as $column ) {
$ret .= '';
$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 ) {
# Change space to non-breaking space to keep headers aligned
$h3char = $char === ' ' ? ' ' : htmlspecialchars( $char );
$ret .= '' . $h3char;
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 .= "\n";
$ret .= '- ';
$ret .= implode( "
\n- ", $articles );
$ret .= '
';
$first = false;
$prevchar = $char;
}
$ret .= " | \n";
}
$ret .= '
';
return $ret;
}
/**
* Format a list of articles chunked by letter in a bullet list.
* @param array $articles
* @param string[] $articles_start_char
* @return string
* @private
*/
static function shortList( $articles, $articles_start_char ) {
$r = '' . htmlspecialchars( $articles_start_char[0] ) . "
\n";
$r .= '- ' . $articles[0] . '
';
$articleCount = count( $articles );
for ( $index = 1; $index < $articleCount; $index++ ) {
if ( $articles_start_char[$index] != $articles_start_char[$index - 1] ) {
$r .= "
" . htmlspecialchars( $articles_start_char[$index] ) . "
\n";
}
$r .= "- {$articles[$index]}
";
}
$r .= '
';
return $r;
}
/**
* Create paging links, as a helper method to getSectionPagingLinks().
*
* @param string $first The 'until' parameter for the generated URL
* @param string $last The 'from' parameter for the generated URL
* @param string $type 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
* @throws MWException
* @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.
*
* @param int $rescnt The number of items returned by our database query.
* @param int $dbcnt The number of items according to the category table.
* @param string $type '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 ( ( isset( $this->from[$pagingType] ) && $this->from[$pagingType] !== null ) ||
( isset( $this->until[$pagingType] ) && $this->until[$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;
$category = $this->cat;
wfGetDB( DB_MASTER )->onTransactionIdle( function () use ( $category ) {
$category->refreshCounts();
} );
} else {
// Case 3: hopeless. Don't give a total count at all.
// Messages: category-subcat-count-limited, category-article-count-limited,
// category-file-count-limited
return $this->msg( "category-$type-count-limited" )->numParams( $rescnt )->parseAsBlock();
}
// Messages: category-subcat-count, category-article-count, category-file-count
return $this->msg( "category-$type-count" )->numParams( $rescnt, $totalcnt )->parseAsBlock();
}
}