CallableColumn.php

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<?php
namespace Elgg\Views\TableColumn;

use Elgg\Views\TableColumn;

class CallableColumn implements TableColumn {

    private $heading;

    private $renderer;

    public function __construct(callable $renderer, $heading) {
        $this->renderer = $renderer;
        $this->heading = $heading;
    }

    public function renderHeading() {
        return $this->heading;
    }

    public function renderCell($item, $type, $item_vars) {
        return call_user_func($this->renderer, $item, $type, $item_vars);
    }
}