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<?php
namespace SMW\Page;
use Article;
use SMW\DIWikiPage;
use SMW\Options;
use SMWOutputs as Outputs;
/**
* Abstract subclass of MediaWiki's Article that handles the common tasks of
* article pages for Concept and Property pages. This is mainly parameter
* handling and some very basic output control.
*
* @license GNU GPL v2+
* @since 3.0
*
* @author Nikolas Iwan
* @author Markus Krötzsch
* @author Jeroen De Dauw
*/
abstract class Page extends Article {
/**
* Limit for results per page.
*
* @var integer
*/
protected $limit;
/**
* Start string: print $limit results from here.
*
* @var string
*/
protected $from;
/**
* End string: print $limit results strictly before this article.
*
* @var string
*/
protected $until;
/**
* Cache for the current skin, obtained from $wgUser.
*
* @var Skin
*/
protected $skin;
/**
* @var Options
*/
private $options;
/**
* Overwrite Article::view to add additional HTML to the output.
*
* @see Article::view
*/
public function view() {
$outputPage = $this->getContext()->getOutput();
$outputPage->addModuleStyles( 'ext.smw.page.styles' );
if ( !$this->getOption( 'smwgSemanticsEnabled' ) ) {
$outputPage->setPageTitle( $this->getTitle()->getPrefixedText() );
$outputPage->addHTML( wfMessage( 'smw-semantics-not-enabled' )->text() );
return;
}
if ( ( $redirectTargetURL = $this->getRedirectTargetURL() ) !== false ) {
$outputPage->redirect( $redirectTargetURL );
}
$this->initParameters();
// Copied from CategoryPage
$user = $this->getContext()->getUser();
$request = $this->getContext()->getRequest();
$diff = $request->getVal( 'diff' );
$diffOnly = $request->getBool( 'diffonly', $user->getOption( 'diffonly' ) );
if ( !isset( $diff ) || !$diffOnly ) {
// MW 1.25+
if ( method_exists( $outputPage, 'setIndicators' ) && ( $indicators = $this->getTopIndicators() ) !== '' ) {
$outputPage->setIndicators( $indicators );
}
$outputPage->addHTML( $this->initHtml() );
$outputPage->addHTML( $this->beforeView() );
}
if ( $this->isLockedView() === false ) {
parent::view();
}
if ( !isset( $diff ) || !$diffOnly ) {
$this->showList();
}
$outputPage->addHTML( $this->afterHtml() );
}
/**
* @since 3.0
*
* @param string $key
*
* @return mixed
*/
public function getOption( $key ) {
if ( $this->options === null ) {
$this->options = new Options();
}
return $this->options->safeGet( $key, false );
}
/**
* @since 3.0
*
* @param string $key
* @param mixed $value
*/
public function setOption( $key, $value ) {
if ( $this->options === null ) {
$this->options = new Options();
}
return $this->options->set( $key, $value );
}
/**
* @since 3.0
*
* @return string|boolean
*/
protected function getRedirectTargetURL() {
return false;
}
/**
* @since 2.4
*
* @return string
*/
protected function getTopIndicators() {
return '';
}
/**
* @since 3.0
*
* @return string
*/
protected function initHtml() {
return $this->getIntroductoryText();
}
/**
* @since 2.4
*
* @return string
*/
protected function getIntroductoryText() {
return '';
}
/**
* @since 3.0
*
* @return boolean
*/
protected function isLockedView() {
return false;
}
/**
* Main method for adding all additional HTML to the output stream.
*/
protected function showList() {
$outputPage = $this->getContext()->getOutput();
$request = $this->getContext()->getRequest();
$this->from = $request->getVal( 'from', '' );
$this->until = $request->getVal( 'until', '' );
$outputPage->addHTML( $this->getHtml() );
Outputs::commitToOutputPage( $outputPage );
}
/**
* Initialise some parameters that might be changed by subclasses
* (e.g. $limit). Method can be overwritten in this case.
* If the method returns false, nothing will be printed besides
* the original article.
*
* @return true
*/
protected function initParameters() {
$this->limit = 20;
}
/**
* Returns HTML to be displayed before the article text.
*
* @return string
*/
protected function beforeView() {
return '';
}
/**
* Returns HTML to be displayed after the list display.
*
* @return string
*/
protected function afterHtml() {
return '';
}
/**
* Returns the HTML which is added to $wgOut after the article text.
*
* @return string
*/
protected abstract function getHtml();
/**
* Like Article's getTitle(), but returning a suitable SMWDIWikiPage.
*
* @since 1.6
*
* @return SMWDIWikiPage
*/
protected function getDataItem() {
return DIWikiPage::newFromTitle( $this->getTitle() );
}
}
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