ActionMenu.php

<?php
/**
 * This class represents the action menu used to group actions.
 *
 * @author  Jan-Hendrik Willms <tleilax+studip@gmail.com>
 * @license GPL2 or any later version
 * @since   Stud.IP 3.5
 */
class ActionMenu
{
    const TEMPLATE_FILE_SINGLE   = 'shared/action-menu-single.php';
    const TEMPLATE_FILE_MULTIPLE = 'shared/action-menu.php';

    const RENDERING_MODE_ICONS = 'icons';
    const RENDERING_MODE_MENU = 'menu';

    /**
     * Returns an instance.
     *
     * @return ActionMenu
     */
    public static function get()
    {
        return new self();
    }

    private $actions = [];
    private $attributes = [];

    private $condition_all = null;
    private $condition     = true;

    /**
     * @var string $context The context for the action menu.
     */
    protected $context = '';

    /**
     * @var string|null $rendering_mode The forced rendering mode
     */
    protected $rendering_mode = null;

    /**
     * Private constructur.
     *
     * @see ActionMenu::get()
     */
    private function __construct()
    {
        $this->addCSSClass('action-menu');
    }

    /**
     * Set condition for the next added item. If condition is false,
     * the item will not be added.
     *
     * @param bool $state State of the condition
     * @return ActionMenu instance to allow chaining
     */
    public function condition($state)
    {
        $this->condition = (bool)$state;

        return $this;
    }

    /**
     * Set condition for all the next added items. If condition is false,
     * no items will be added.
     *