style.php

См. документацию.

<?php
 
namespace Bitrix\Landing\Node;
 
use Bitrix\Landing\Block;
use Bitrix\Main\Web\DOM\Node;
use Bitrix\Main\Web\DOM\StyleInliner;
 
class Style
{
    public static function getStyle(Block $block, string $selector): array
    {
        $data = [];
        $resultList = self::getNodesBySelector($block, $selector);
 
        foreach ($resultList as $pos => $res)
        {
            if ($res->getNodeType() === $res::ELEMENT_NODE)
            {
                $classList = trim($res->getAttribute('class'));
                if ($classList)
                {
                    $data['classList'][$pos] = $classList;
                }
 
                $styles = StyleInliner::getStyle($res);
                $stylesPrepared = [];
                foreach ($styles as $key => $style)
                {
                    if ($style && $key !== 'background-image')
                    {
                        $stylesPrepared[$key] = $style;
                    }
                    if ($key === 'background-image' && $style === '')
                    {
                        $stylesPrepared[$key] = $style;
                    }
                }
                if (!empty($stylesPrepared))
                {
                    $data['style'][$pos] = $stylesPrepared;
 
                }
            }
        }
 
        return $data;
    }

    public static function getNodesBySelector(Block $block, string $selector): array
    {
        $doc = $block->getDom();
 
        // prepare wrapper
        $wrapper = '#' . $block->getAnchor($block->getId());
        if ($selector === '#wrapper')
        {
            $selector = '#block' . $block->getId();
        }
 
        // nodes for get
        if ($selector === $wrapper)
        {
            $wrapperNode = [];
            foreach ($doc->getChildNodesArray() as $node)
            {
                if ($node->getNodeType() === Node::ELEMENT_NODE)
                {
                    $wrapperNode[] = $node;
                    break;
                }
            }
 
            return $wrapperNode;
        }
 
        return $doc->querySelectorAll($selector);
    }
}