DisplayTrait.php

<?php
/*
 * citeproc-php
 *
 * @link        http://github.com/seboettg/citeproc-php for the source repository
 * @copyright   Copyright (c) 2016 Sebastian Böttger.
 * @license     https://opensource.org/licenses/MIT
 */
 
namespace Seboettg\CiteProc\Styles;
 
use SimpleXMLElement;
 
trait DisplayTrait
{
 
    private static $allowedValues = [
        "block",
        "left-margin",
        "right-inline",
        "indent"
    ];
 
    private $display;
 
    public function initDisplayAttributes(SimpleXMLElement $node)
    {
        foreach ($node->attributes() as $attribute) {
            switch ($attribute->getName()) {
                case 'display':
                    $this->display = (string) $attribute;
                    return;
            }
        }
    }
 
    public function wrapDisplayBlock($text)
    {
        if (!in_array($this->display, self::$allowedValues)) {
            return $text;
        }
        $divStyle = "class=\"csl-".$this->display."\"";
        return "<div $divStyle>$text</div>";
    }
}