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<?php
/**
* 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
*/
namespace MediaWiki\Pager;
use MediaWiki\Context\IContextSource;
use MediaWiki\Html\Html;
use MediaWiki\Linker\LinkRenderer;
use MediaWiki\Parser\ParserOutput;
use MediaWiki\Xml\XmlSelect;
use OOUI\ButtonGroupWidget;
use OOUI\ButtonWidget;
use stdClass;
/**
* Table-based display with a user-selectable sort order
*
* @stable to extend
* @ingroup Pager
*/
abstract class TablePager extends IndexPager {
/** @var string */
protected $mSort;
/** @var stdClass */
protected $mCurrentRow;
/**
* @stable to call
*
* @param IContextSource|null $context
* @param LinkRenderer|null $linkRenderer
*/
public function __construct( ?IContextSource $context = null, ?LinkRenderer $linkRenderer = null ) {
if ( $context ) {
$this->setContext( $context );
}
$this->mSort = $this->getRequest()->getText( 'sort' );
if ( !array_key_exists( $this->mSort, $this->getFieldNames() )
|| !$this->isFieldSortable( $this->mSort )
) {
$this->mSort = $this->getDefaultSort();
}
if ( $this->getRequest()->getBool( 'asc' ) ) {
$this->mDefaultDirection = IndexPager::DIR_ASCENDING;
} elseif ( $this->getRequest()->getBool( 'desc' ) ) {
$this->mDefaultDirection = IndexPager::DIR_DESCENDING;
} /* Else leave it at whatever the class default is */
// Parent constructor needs mSort set, so we call it last
parent::__construct( null, $linkRenderer );
}
/**
* Get the formatted result list.
*
* Calls getBody() and getModuleStyles() and builds a ParserOutput object. (This is a bit hacky
* but works well.)
*
* @since 1.24
* @return ParserOutput
*/
public function getBodyOutput() {
$body = parent::getBody();
$pout = new ParserOutput;
$pout->setRawText( $body );
return $pout;
}
/**
* Get the formatted result list, with navigation bars.
*
* Calls getBody(), getNavigationBar() and getModuleStyles() and
* builds a ParserOutput object. (This is a bit hacky but works well.)
*
* @since 1.24
* @return ParserOutput
*/
public function getFullOutput() {
$navigation = $this->getNavigationBar();
$body = parent::getBody();
$pout = new ParserOutput;
$pout->setRawText( $navigation . $body . $navigation );
$pout->addModuleStyles( $this->getModuleStyles() );
return $pout;
}
/**
* @stable to override
* @return string
*/
protected function getStartBody() {
$sortClass = $this->getSortHeaderClass();
$s = '';
$fields = $this->getFieldNames();
// Make table header
foreach ( $fields as $field => $name ) {
if ( strval( $name ) == '' ) {
$s .= Html::rawElement( 'th', [], "\u{00A0}" ) . "\n";
} elseif ( $this->isFieldSortable( $field ) ) {
$query = [ 'sort' => $field, 'limit' => $this->mLimit ];
$linkType = null;
$class = null;
if ( $this->mSort == $field ) {
// The table is sorted by this field already, make a link to sort in the other direction
// We don't actually know in which direction other fields will be sorted by default…
if ( $this->mDefaultDirection == IndexPager::DIR_DESCENDING ) {
$linkType = 'asc';
$class = "$sortClass mw-datatable-is-sorted mw-datatable-is-descending";
$query['asc'] = '1';
$query['desc'] = '';
} else {
$linkType = 'desc';
$class = "$sortClass mw-datatable-is-sorted mw-datatable-is-ascending";
$query['asc'] = '';
$query['desc'] = '1';
}
}
$link = $this->makeLink( htmlspecialchars( $name ), $query, $linkType );
$s .= Html::rawElement( 'th', [ 'class' => $class ], $link ) . "\n";
} else {
$s .= Html::element( 'th', [], $name ) . "\n";
}
}
$ret = Html::openElement( 'table', [
'class' => $this->getTableClass() ]
);
$ret .= Html::rawElement( 'thead', [], Html::rawElement( 'tr', [], "\n" . $s . "\n" ) );
$ret .= Html::openElement( 'tbody' ) . "\n";
return $ret;
}
/**
* @stable to override
* @return string
*/
protected function getEndBody() {
return "</tbody></table>\n";
}
/**
* @return string
*/
protected function getEmptyBody() {
$colspan = count( $this->getFieldNames() );
$msgEmpty = $this->msg( 'table_pager_empty' )->text();
return Html::rawElement( 'tr', [],
Html::element( 'td', [ 'colspan' => $colspan ], $msgEmpty ) );
}
/**
* @stable to override
* @param stdClass $row
* @return string HTML
*/
public function formatRow( $row ) {
$this->mCurrentRow = $row; // In case formatValue etc need to know
$s = Html::openElement( 'tr', $this->getRowAttrs( $row ) ) . "\n";
$fieldNames = $this->getFieldNames();
foreach ( $fieldNames as $field => $name ) {
$value = $row->$field ?? null;
$formatted = strval( $this->formatValue( $field, $value ) );
if ( $formatted == '' ) {
$formatted = "\u{00A0}";
}
$s .= Html::rawElement( 'td', $this->getCellAttrs( $field, $value ), $formatted ) . "\n";
}
$s .= Html::closeElement( 'tr' ) . "\n";
return $s;
}
/**
* Get a class name to be applied to the given row.
*
* @stable to override
*
* @param stdClass $row The database result row
* @return string
*/
protected function getRowClass( $row ) {
return '';
}
/**
* Get attributes to be applied to the given row.
*
* @stable to override
*
* @param stdClass $row The database result row
* @return array Array of attribute => value
*/
protected function getRowAttrs( $row ) {
return [ 'class' => $this->getRowClass( $row ) ];
}
/**
* @return stdClass
*/
protected function getCurrentRow() {
return $this->mCurrentRow;
}
/**
* Get any extra attributes to be applied to the given cell. Don't
* take this as an excuse to hardcode styles; use classes and
* CSS instead. Row context is available in $this->mCurrentRow
*
* @stable to override
*
* @param string $field The column
* @param string $value The cell contents
* @return array Array of attr => value
*/
protected function getCellAttrs( $field, $value ) {
return [ 'class' => 'TablePager_col_' . $field ];
}
/**
* @inheritDoc
* @stable to override
*/
public function getIndexField() {
return $this->mSort;
}
/**
* TablePager relies on `mw-datatable` for styling, see T214208
*
* @stable to override
* @return string
*/
protected function getTableClass() {
return 'mw-datatable';
}
/**
* @stable to override
* @return string
*/
protected function getNavClass() {
return 'TablePager_nav';
}
/**
* @stable to override
* @return string
*/
protected function getSortHeaderClass() {
return 'TablePager_sort';
}
/**
* A navigation bar with images
*
* @stable to override
* @return string HTML
*/
public function getNavigationBar() {
if ( !$this->isNavigationBarShown() ) {
return '';
}
$this->getOutput()->enableOOUI();
$types = [ 'first', 'prev', 'next', 'last' ];
$queries = $this->getPagingQueries();
$buttons = [];
$title = $this->getTitle();
foreach ( $types as $type ) {
$buttons[] = new ButtonWidget( [
// Messages used here:
// * table_pager_first
// * table_pager_prev
// * table_pager_next
// * table_pager_last
'classes' => [ 'TablePager-button-' . $type ],
'flags' => [ 'progressive' ],
'framed' => false,
'label' => $this->msg( 'table_pager_' . $type )->text(),
'href' => $queries[ $type ] ?
$title->getLinkURL( $queries[ $type ] + $this->getDefaultQuery() ) :
null,
'icon' => $type === 'prev' ? 'previous' : $type,
'disabled' => $queries[ $type ] === false
] );
}
return new ButtonGroupWidget( [
'classes' => [ $this->getNavClass() ],
'items' => $buttons,
] );
}
/**
* @inheritDoc
*/
public function getModuleStyles() {
return array_merge(
parent::getModuleStyles(), [ 'oojs-ui.styles.icons-movement' ]
);
}
/**
* Get a "<select>" element which has options for each of the allowed limits
*
* @param string[] $attribs Extra attributes to set
* @return string HTML fragment
*/
public function getLimitSelect( array $attribs = [] ): string {
$select = new XmlSelect( 'limit', false, $this->mLimit );
$select->addOptions( $this->getLimitSelectList() );
foreach ( $attribs as $name => $value ) {
$select->setAttribute( $name, $value );
}
return $select->getHTML();
}
/**
* Get a list of items to show in a "<select>" element of limits.
* This can be passed directly to XmlSelect::addOptions().
*
* @since 1.22
* @return array
*/
public function getLimitSelectList() {
# Add the current limit from the query string
# to avoid that the limit is lost after clicking Go next time
if ( !in_array( $this->mLimit, $this->mLimitsShown ) ) {
$this->mLimitsShown[] = $this->mLimit;
sort( $this->mLimitsShown );
}
$ret = [];
foreach ( $this->mLimitsShown as $key => $value ) {
# The pair is either $index => $limit, in which case the $value
# will be numeric, or $limit => $text, in which case the $value
# will be a string.
if ( is_int( $value ) ) {
$limit = $value;
$text = $this->getLanguage()->formatNum( $limit );
} else {
$limit = $key;
$text = $value;
}
$ret[$text] = $limit;
}
return $ret;
}
/**
* Get \<input type="hidden"\> elements for use in a method="get" form.
* Resubmits all defined elements of the query string, except for a
* exclusion list, passed in the $noResubmit parameter.
* Also array values are discarded for security reasons (per WebRequest::getVal)
*
* @param array $noResubmit Parameters from the request query which should not be resubmitted
* @return string HTML fragment
*/
public function getHiddenFields( $noResubmit = [] ) {
$noResubmit = (array)$noResubmit;
$query = $this->getRequest()->getQueryValues();
foreach ( $noResubmit as $name ) {
unset( $query[$name] );
}
$s = '';
foreach ( $query as $name => $value ) {
if ( is_array( $value ) ) {
// Per WebRequest::getVal: Array values are discarded for security reasons.
continue;
}
$s .= Html::hidden( $name, $value ) . "\n";
}
return $s;
}
/**
* Get a form containing a limit selection dropdown
*
* @return string HTML fragment
*/
public function getLimitForm() {
return Html::rawElement(
'form',
[
'method' => 'get',
'action' => wfScript(),
],
"\n" . $this->getLimitDropdown()
) . "\n";
}
/**
* Gets a limit selection dropdown
*
* @return string
*/
private function getLimitDropdown() {
# Make the select with some explanatory text
$msgSubmit = $this->msg( 'table_pager_limit_submit' )->escaped();
return $this->msg( 'table_pager_limit' )
->rawParams( $this->getLimitSelect() )->escaped() .
"\n<input type=\"submit\" value=\"$msgSubmit\"/>\n" .
$this->getHiddenFields( [ 'limit' ] );
}
/**
* Return true if the named field should be sortable by the UI, false
* otherwise
*
* @param string $field
* @return bool
*/
abstract protected function isFieldSortable( $field );
/**
* Format a table cell. The return value should be HTML, but use an empty
* string not   for empty cells. Do not include the <td> and </td>.
*
* The current result row is available as $this->mCurrentRow, in case you
* need more context.
*
* @param string $name The database field name
* @param string|null $value The value retrieved from the database, or null if
* the row doesn't contain this field
*/
abstract public function formatValue( $name, $value );
/**
* The database field name used as a default sort order.
*
* Note that this field will only be sorted on if isFieldSortable returns
* true for this field. If not (e.g. paginating on multiple columns), this
* should return empty string, and getIndexField should be overridden.
*
* @return string
*/
abstract public function getDefaultSort();
/**
* An array mapping database field names to a textual description of the
* field name, for use in the table header. The description should be plain
* text, it will be HTML-escaped later.
*
* @return string[]
*/
abstract protected function getFieldNames();
}
/** @deprecated class alias since 1.41 */
class_alias( TablePager::class, 'TablePager' );