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<?php |
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|
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namespace MasterAddons\Modules\Utilities; |
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|
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use \Elementor\Controls_Manager; |
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|
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/** |
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* Author Name: Liton Arefin |
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* Author URL: https://jeweltheme.com |
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* Date: 1/2/20 |
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*/ |
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|
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if (!defined('ABSPATH')) { |
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exit; |
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} // Exit if accessed directly. |
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|
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class CustomCss |
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{ |
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|
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/* |
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* Instance of this class |
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*/ |
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private static $instance = null; |
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|
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|
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public function __construct() |
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{ |
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// Add new controls to advanced tab globally |
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add_action("elementor/element/after_section_end", array($this, 'jltma_add_section_custom_css_controls'), 25, 3); |
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|
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// Render the custom CSS |
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add_action('elementor/element/parse_css', array($this, 'jltma_add_post_css'), 10, 2); |
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|
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// Security: sanitize Custom CSS on save. The control is registered only for |
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// edit_posts users, but Elementor saves can be crafted directly via admin-ajax |
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// (elementor_ajax), so the stored value must be cleaned of tag-breakout vectors |
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// (e.g. "</style><script>") before it is persisted and later added to the |
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// (possibly inline) stylesheet. |
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add_filter('elementor/document/save/data', array($this, 'jltma_sanitize_custom_css_on_save'), 10, 2); |
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} |
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|
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/** |
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* Sanitize the 'custom_css' element settings in the data being saved. |
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* |
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* @param array $data Document data ('settings' + 'elements'). |
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* @param mixed $document Elementor document instance. |
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* @return array |
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*/ |
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public function jltma_sanitize_custom_css_on_save($data, $document) |
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{ |
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if (isset($data['settings']['custom_css'])) { |
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$data['settings']['custom_css'] = $this->jltma_sanitize_css($data['settings']['custom_css']); |
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} |
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|
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if (!empty($data['elements']) && is_array($data['elements'])) { |
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$data['elements'] = $this->jltma_sanitize_element_custom_css($data['elements']); |
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} |
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|
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return $data; |
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} |
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|
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/** |
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* Recursively sanitize the 'custom_css' setting in element data. |
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* |
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* @param array $elements |
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* @return array |
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*/ |
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private function jltma_sanitize_element_custom_css($elements) |
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{ |
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foreach ($elements as &$element) { |
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if (isset($element['settings']['custom_css'])) { |
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$element['settings']['custom_css'] = $this->jltma_sanitize_css($element['settings']['custom_css']); |
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} |
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if (!empty($element['elements']) && is_array($element['elements'])) { |
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$element['elements'] = $this->jltma_sanitize_element_custom_css($element['elements']); |
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} |
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} |
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unset($element); |
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|
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return $elements; |
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} |
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|
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/** |
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* Strip tag-breakout and active vectors from a CSS string. Valid CSS never needs |
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* HTML tags, PHP tags, expression(), @import or javascript:/behavior: — removing |
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* them prevents breaking out of an inline <style> block (XSS) while leaving normal |
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* declarations intact. |
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* |
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* @param string $css |
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* @return string |
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*/ |
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private function jltma_sanitize_css($css) |
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{ |
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if (!is_string($css) || '' === $css) { |
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return ''; |
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} |
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|
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$css = str_replace(chr(0), '', $css); |
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|
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// PHP tags. |
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$css = preg_replace('/<\?php/i', '', $css); |
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$css = str_replace(array('<?=', '<?', '?>'), '', $css); |
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|
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// Any HTML tag (kills </style>/<script> breakout). |
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$css = preg_replace('#</?[a-z!][^>]*>#i', '', $css); |
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|
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// Dangerous CSS constructs. |
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$css = preg_replace('/expression\s*\(/i', '', $css); |
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$css = preg_replace('/(javascript|vbscript)\s*:/i', '', $css); |
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$css = preg_replace('/behavior\s*:/i', '', $css); |
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$css = preg_replace('/@import\b/i', '', $css); |
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|
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return $css; |
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} |
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|
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|
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|
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public function jltma_add_section_custom_css_controls($widget, $section_id, $args) |
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{ |
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|
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if ('section_custom_css_pro' !== $section_id) { |
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return; |
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} |
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|
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// Skip when Elementor Pro is active — Pro provides its own Custom CSS |
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if (defined('ELEMENTOR_PRO_VERSION')) { |
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return; |
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} |
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|
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if (!current_user_can('edit_posts')) { |
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return; |
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} |
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|
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$widget->start_controls_section( |
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'jltma_custom_css_section', |
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array( |
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'label' => __(' Custom CSS', 'master-addons') . JLTMA_EXTENSION_BADGE, |
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'tab' => Controls_Manager::TAB_ADVANCED |
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) |
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); |
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|
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$widget->add_control( |
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'custom_css', |
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array( |
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'type' => Controls_Manager::CODE, |
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'label' => __('Custom CSS', 'master-addons'), |
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'label_block' => true, |
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'language' => 'css' |
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) |
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); |
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ob_start(); ?> |
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<pre> |
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Examples: |
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// To target main element |
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selector { color: red; } |
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// For child element |
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selector .child-element{ margin: 10px; } |
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</pre> |
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<?php |
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$output = ob_get_clean(); |
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|
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$widget->add_control( |
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'custom_css_description', |
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array( |
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'raw' => __('Use "selector" keyword to target wrapper element.', 'master-addons') . $output, |
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'type' => Controls_Manager::RAW_HTML, |
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'content_classes' => 'elementor-descriptor', |
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'separator' => 'none' |
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) |
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); |
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|
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$widget->end_controls_section(); |
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|
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} |
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|
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|
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|
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public function jltma_add_post_css($post_css, $element) |
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{ |
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if (defined('ELEMENTOR_PRO_VERSION')) { |
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return; |
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} |
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|
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$element_settings = $element->get_settings(); |
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|
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if (empty($element_settings['custom_css'])) { |
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return; |
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} |
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|
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$css = trim($element_settings['custom_css']); |
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|
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// Defense in depth: strip tag-breakout/active vectors before adding the CSS to |
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// the (possibly inline) stylesheet — covers values saved before this fix. |
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$css = $this->jltma_sanitize_css($css); |
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|
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if (empty($css)) { |
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return; |
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} |
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|
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// Replace 'selector' keyword with the element's unique selector |
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$css = str_replace('selector', $post_css->get_element_unique_selector($element), $css); |
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|
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// Add a css comment for debugging |
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$css = sprintf( |
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'/* Start custom CSS for %s, class: %s */ %s /* End custom CSS */', |
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$element->get_name(), |
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$element->get_unique_selector(), |
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$css |
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); |
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|
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$post_css->get_stylesheet()->add_raw_css($css); |
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} |
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|
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|
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|
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public static function get_instance() |
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{ |
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if (!self::$instance) { |
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self::$instance = new self; |
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} |
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return self::$instance; |
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} |
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} |
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|
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CustomCss::get_instance(); |
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|
