#558: Content Types Output Style Attribute Removal

- Adding Converter to Remove `style` Attribute(s) from Page Builder

app/code/Magento/PageBuilder/Setup/Converters/PageBuilderStripStyles.php

@@ -0,0 +1,54 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+declare(strict_types = 1);
+
+namespace Magento\PageBuilder\Setup\Converters;
+
+use Magento\Framework\DB\DataConverter\DataConverterInterface;
+use Magento\PageBuilder\Model\Dom\Adapter\ElementInterface;
+use Magento\PageBuilder\Model\Dom\HtmlDocumentFactory;
+
+/**
+ * ...
+ */
+class PageBuilderStripStyles implements DataConverterInterface
+{
+    /**
+     * @var HtmlDocumentFactory
+     */
+    private $htmlDocumentFactory;
+
+    /**
+     * @param HtmlDocumentFactory $htmlDocumentFactory
+     */
+    public function __construct(HtmlDocumentFactory $htmlDocumentFactory)
+    {
+        $this->htmlDocumentFactory = $htmlDocumentFactory;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function convert($value)
+    {
+        $document = $this->htmlDocumentFactory->create(['document' => $value]);
+        $queryPageBuilderElements = $document->querySelectorAll('[style]'); // @todo: Match Types
+
+        /** @var ElementInterface $element */
+        foreach ($queryPageBuilderElements as $element) {
+            $style = $element->getAttribute('style');
+
+            if ($style) {
+                // @todo: Convert to Inline
+
+                $element->removeAttribute('style');
+            }
+        }
+
+        return $queryPageBuilderElements->count() > 0 ? $document->stripHtmlWrapperTags() : $value;
+    }
+}

app/code/Magento/PageBuilder/Setup/Patch/Data/UpgradePageBuilderStripStyles.php

@@ -0,0 +1,63 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+declare(strict_types = 1);
+
+namespace Magento\PageBuilder\Setup\Patch\Data;
+
+use Magento\Framework\DB\FieldDataConversionException;
+use Magento\Framework\Setup\Patch\DataPatchInterface;
+use Magento\PageBuilder\Setup\Converters\PageBuilderStripStyles;
+use Magento\PageBuilder\Setup\UpgradeContentHelper;
+
+/**
+ * ...
+ */
+class UpgradePageBuilderStripStyles implements DataPatchInterface
+{
+    /**
+     * @var UpgradeContentHelper
+     */
+    private $helper;
+
+    /**
+     * @param UpgradeContentHelper $helper
+     */
+    public function __construct(
+        UpgradeContentHelper $helper
+    ) {
+        $this->helper = $helper;
+    }
+
+    /**
+     * Upgrade
+     *
+     * @return void
+     * @throws FieldDataConversionException
+     */
+    public function apply()
+    {
+        $this->helper->upgrade([
+            PageBuilderStripStyles::class
+        ]);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getAliases()
+    {
+        return [];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public static function getDependencies()
+    {
+        return [];
+    }
+}