<?php

namespace Artmark\Forms\Attributes;

use Artmark\Forms\Utils;

/**
 * Description of StyleAttribute
 *
 * @author Andrey Pokidov <pokidov@e-traffic.ru>
 */
trait StyleAttribute
{
    /**
     *
     * @var string
     */
    private $style = '';
    
    /**
     * HTML style attribute of the tag
     * @return string
     */
    public function style()
    {
        return $this->style;
    }
    
    /**
     * 
     * @return boolean
     */
    public function hasStyle()
    {
        return $this->style !== '';
    }
    
    /**
     * 
     * @param string $newStyle
     * @return $this
     */
    public function setStyle($newStyle)
    {
        self::checkStyle($newStyle);
        
        $this->style = Utils::cleanString($newStyle);
        
        return $this;
    }
    
    /**
     * 
     * @return $this
     */
    public function removeStyle()
    {
        $this->style = '';
        
        return $this;
    }
    
    protected function appendStyleAttribute(array & $attributes)
    {
        if ($this->hasStyle())
        {
            $attributes['style'] = $this->style;
        }
    }
    
    public static function checkStyle($style)
    {
        if (!self::isCorrectStyle($style)) {
            throw new AttributeException('Incorrect style value: `' . strval($style) . '`');
        }
    }
    
    public static function isCorrectStyle($style)
    {
        return is_string($style);
    }
}