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<?php /** * Customize API: WP_Customize_Custom_CSS_Setting class * * This handles validation, sanitization and saving of the value. * * @package WordPress * @subpackage Customize * @since 4.7.0 */ /** * Custom Setting to handle WP Custom CSS. * * @since 4.7.0 * * @see WP_Customize_Setting */ final class WP_Customize_Custom_CSS_Setting extends WP_Customize_Setting { /** * The setting type. * * @since 4.7.0 * @var string */ public $type = 'custom_css'; /** * Setting Transport * * @since 4.7.0 * @var string */ public $transport = 'postMessage'; /** * Capability required to edit this setting. * * @since 4.7.0 * @var string */ public $capability = 'edit_css'; /** * Stylesheet * * @since 4.7.0 * @var string */ public $stylesheet = ''; /** * WP_Customize_Custom_CSS_Setting constructor. * * @since 4.7.0 * * @throws Exception If the setting ID does not match the pattern `custom_css[$stylesheet]`. * * @param WP_Customize_Manager $manager Customizer bootstrap instance. * @param string $id A specific ID of the setting. * Can be a theme mod or option name. * @param array $args Setting arguments. */ public function __construct( $manager, $id, $args = array() ) { parent::__construct( $manager, $id, $args ); if ( 'custom_css' !== $this->id_data['base'] ) { throw new Exception( 'Expected custom_css id_base.' ); } if ( 1 !== count( $this->id_data['keys'] ) || empty( $this->id_data['keys'][0] ) ) { throw new Exception( 'Expected single stylesheet key.' ); } $this->stylesheet = $this->id_data['keys'][0]; } /** * Add filter to preview post value. * * @since 4.7.9 * * @return bool False when preview short-circuits due no change needing to be previewed. */ public function preview() { if ( $this->is_previewed ) { return false; } $this->is_previewed = true; add_filter( 'wp_get_custom_css', array( $this, 'filter_previewed_wp_get_custom_css' ), 9, 2 ); return true; } /** * Filters `wp_get_custom_css` for applying the customized value. * * This is used in the preview when `wp_get_custom_css()` is called for rendering the styles. * * @since 4.7.0 * * @see wp_get_custom_css() * * @param string $css Original CSS. * @param string $stylesheet Current stylesheet. * @return string CSS. */ public function filter_previewed_wp_get_custom_css( $css, $stylesheet ) { if ( $stylesheet === $this->stylesheet ) { $customized_value = $this->post_value( null ); if ( ! is_null( $customized_value ) ) { $css = $customized_value; } } return $css; } /** * Fetch the value of the setting. Will return the previewed value when `preview()` is called. * * @since 4.7.0 * * @see WP_Customize_Setting::value() * * @return string */ public function value() { if ( $this->is_previewed ) { $post_value = $this->post_value( null ); if ( null !== $post_value ) { return $post_value; } } $id_base = $this->id_data['base']; $value = ''; $post = wp_get_custom_css_post( $this->stylesheet ); if ( $post ) { $value = $post->post_content; } if ( empty( $value ) ) { $value = $this->default; } /** This filter is documented in wp-includes/class-wp-customize-setting.php */ $value = apply_filters( "customize_value_{$id_base}", $value, $this ); return $value; } /** * Validate a received value for being valid CSS. * * Checks for imbalanced braces, brackets, and comments. * Notifications are rendered when the customizer state is saved. * * @since 4.7.0 * @since 4.9.0 Checking for balanced characters has been moved client-side via linting in code editor. * @since 5.9.0 Renamed `$css` to `$value` for PHP 8 named parameter support. * * @param string $value CSS to validate. * @return true|WP_Error True if the input was validated, otherwise WP_Error. */ public function validate( $value ) { // Restores the more descriptive, specific name for use within this method. $css = $value; $validity = new WP_Error(); if ( preg_match( '#</?\w+#', $css ) ) { $validity->add( 'illegal_markup', __( 'Markup is not allowed in CSS.' ) ); } if ( ! $validity->has_errors() ) { $validity = parent::validate( $css ); } return $validity; } /** * Store the CSS setting value in the custom_css custom post type for the stylesheet. * * @since 4.7.0 * @since 5.9.0 Renamed `$css` to `$value` for PHP 8 named parameter support. * * @param string $value CSS to update. * @return int|false The post ID or false if the value could not be saved. */ public function update( $value ) { // Restores the more descriptive, specific name for use within this method. $css = $value; if ( empty( $css ) ) { $css = ''; } $r = wp_update_custom_css_post( $css, array( 'stylesheet' => $this->stylesheet, ) ); if ( $r instanceof WP_Error ) { return false; } $post_id = $r->ID; // Cache post ID in theme mod for performance to avoid additional DB query. if ( $this->manager->get_stylesheet() === $this->stylesheet ) { set_theme_mod( 'custom_css_post_id', $post_id ); } return $post_id; } }
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