PagerTools.php

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<?php
 
namespace MediaWiki\Pager;
 
use IContextSource;
use MediaWiki\HookContainer\HookRunner;
use MediaWiki\Html\Html;
use MediaWiki\Linker\Linker;
use MediaWiki\Linker\LinkRenderer;
use MediaWiki\Page\PageIdentity;
use MediaWiki\Revision\RevisionRecord;
 
class PagerTools {
    private $preventClickjacking = false;
    private $tools = [];
 
    public function __construct(
        RevisionRecord $revRecord,
        ?RevisionRecord $previousRevRecord,
        bool $showRollbackLink,
        HookRunner $hookRunner,
        PageIdentity $title,
        IContextSource $context,
        LinkRenderer $linkRenderer
    ) {
        $tools = [];
        $authority = $context->getAuthority();
        # Rollback and undo links
        $userCanEditTitle = $authority->probablyCan( 'edit', $title );
        if ( $showRollbackLink && $userCanEditTitle ) {
            if ( $authority->probablyCan( 'rollback', $title ) ) {
                // Get a rollback link without the brackets
                $rollbackLink = Linker::generateRollback(
                    $revRecord,
                    $context,
                    [ 'noBrackets' ]
                );
                if ( $rollbackLink ) {
                    $this->preventClickjacking = true;
                    $tools[] = $rollbackLink;
                }
            }
        }
        if ( $userCanEditTitle && $previousRevRecord ) {
            if ( !$revRecord->isDeleted( RevisionRecord::DELETED_TEXT )
                && !$previousRevRecord->isDeleted( RevisionRecord::DELETED_TEXT )
            ) {
                # Create undo tooltip for the first (=latest) line only
                $undoTooltip = $showRollbackLink
                    ? [ 'title' => $context->msg( 'tooltip-undo' )->text() ]
                    : [];
                $undolink = $linkRenderer->makeKnownLink(
                    $title,
                    $context->msg( 'editundo' )->text(),
                    $undoTooltip,
                    [
                        'action' => 'edit',
                        'undoafter' => $previousRevRecord->getId(),
                        'undo' => $revRecord->getId()
                    ]
                );
                $tools[] = "<span class=\"mw-history-undo\">{$undolink}</span>";
            }
        }
        // Allow extension to add their own links here
        // FIXME previously this was only called on history; restore that and deprecate in favor
        //   of a more generic hook (See T326180)
        $hookRunner->onHistoryTools(
            $revRecord,
            $tools,
            $previousRevRecord,
            $authority->getUser()
        );
        $this->tools = $tools;
    }
 
    public function shouldPreventClickjacking() {
        return $this->preventClickjacking;
    }
 
    public function toHTML() {
        $tools = $this->tools;
        $s2 = '';
        if ( $tools ) {
            $s2 .= ' ' . Html::openElement( 'span', [ 'class' => 'mw-changeslist-links mw-pager-tools' ] );
            foreach ( $tools as $tool ) {
                $s2 .= Html::rawElement( 'span', [], $tool );
            }
            $s2 .= Html::closeElement( 'span' );
        }
        return $s2;
    }
}
 
class_alias( PagerTools::class, 'PagerTools' );