--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/fonts/class-wp-font-utils.php Fri Sep 05 18:40:08 2025 +0200
@@ -0,0 +1,259 @@
+<?php
+/**
+ * Font Utils class.
+ *
+ * Provides utility functions for working with font families.
+ *
+ * @package WordPress
+ * @subpackage Fonts
+ * @since 6.5.0
+ */
+
+/**
+ * A class of utilities for working with the Font Library.
+ *
+ * These utilities may change or be removed in the future and are intended for internal use only.
+ *
+ * @since 6.5.0
+ * @access private
+ */
+class WP_Font_Utils {
+ /**
+ * Adds surrounding quotes to font family names that contain special characters.
+ *
+ * It follows the recommendations from the CSS Fonts Module Level 4.
+ * @link https://www.w3.org/TR/css-fonts-4/#font-family-prop
+ *
+ * @since 6.5.0
+ *
+ * @param string $item A font family name.
+ * @return string The font family name with surrounding quotes, if necessary.
+ */
+ private static function maybe_add_quotes( $item ) {
+ // Matches strings that are not exclusively alphabetic characters or hyphens, and do not exactly follow the pattern generic(alphabetic characters or hyphens).
+ $regex = '/^(?!generic\([a-zA-Z\-]+\)$)(?!^[a-zA-Z\-]+$).+/';
+ $item = trim( $item );
+ if ( preg_match( $regex, $item ) ) {
+ $item = trim( $item, "\"'" );
+ return '"' . $item . '"';
+ }
+ return $item;
+ }
+
+ /**
+ * Sanitizes and formats font family names.
+ *
+ * - Applies `sanitize_text_field`.
+ * - Adds surrounding quotes to names containing any characters that are not alphabetic or dashes.
+ *
+ * It follows the recommendations from the CSS Fonts Module Level 4.
+ * @link https://www.w3.org/TR/css-fonts-4/#font-family-prop
+ *
+ * @since 6.5.0
+ * @access private
+ *
+ * @see sanitize_text_field()
+ *
+ * @param string $font_family Font family name(s), comma-separated.
+ * @return string Sanitized and formatted font family name(s).
+ */
+ public static function sanitize_font_family( $font_family ) {
+ if ( ! $font_family ) {
+ return '';
+ }
+
+ $output = sanitize_text_field( $font_family );
+ $formatted_items = array();
+ if ( str_contains( $output, ',' ) ) {
+ $items = explode( ',', $output );
+ foreach ( $items as $item ) {
+ $formatted_item = self::maybe_add_quotes( $item );
+ if ( ! empty( $formatted_item ) ) {
+ $formatted_items[] = $formatted_item;
+ }
+ }
+ return implode( ', ', $formatted_items );
+ }
+ return self::maybe_add_quotes( $output );
+ }
+
+ /**
+ * Generates a slug from font face properties, e.g. `open sans;normal;400;100%;U+0-10FFFF`
+ *
+ * Used for comparison with other font faces in the same family, to prevent duplicates
+ * that would both match according the CSS font matching spec. Uses only simple case-insensitive
+ * matching for fontFamily and unicodeRange, so does not handle overlapping font-family lists or
+ * unicode ranges.
+ *
+ * @since 6.5.0
+ * @access private
+ *
+ * @link https://drafts.csswg.org/css-fonts/#font-style-matching
+ *
+ * @param array $settings {
+ * Font face settings.
+ *
+ * @type string $fontFamily Font family name.
+ * @type string $fontStyle Optional font style, defaults to 'normal'.
+ * @type string $fontWeight Optional font weight, defaults to 400.
+ * @type string $fontStretch Optional font stretch, defaults to '100%'.
+ * @type string $unicodeRange Optional unicode range, defaults to 'U+0-10FFFF'.
+ * }
+ * @return string Font face slug.
+ */
+ public static function get_font_face_slug( $settings ) {
+ $defaults = array(
+ 'fontFamily' => '',
+ 'fontStyle' => 'normal',
+ 'fontWeight' => '400',
+ 'fontStretch' => '100%',
+ 'unicodeRange' => 'U+0-10FFFF',
+ );
+ $settings = wp_parse_args( $settings, $defaults );
+ if ( function_exists( 'mb_strtolower' ) ) {
+ $font_family = mb_strtolower( $settings['fontFamily'] );
+ } else {
+ $font_family = strtolower( $settings['fontFamily'] );
+ }
+ $font_style = strtolower( $settings['fontStyle'] );
+ $font_weight = strtolower( $settings['fontWeight'] );
+ $font_stretch = strtolower( $settings['fontStretch'] );
+ $unicode_range = strtoupper( $settings['unicodeRange'] );
+
+ // Convert weight keywords to numeric strings.
+ $font_weight = str_replace( array( 'normal', 'bold' ), array( '400', '700' ), $font_weight );
+
+ // Convert stretch keywords to numeric strings.
+ $font_stretch_map = array(
+ 'ultra-condensed' => '50%',
+ 'extra-condensed' => '62.5%',
+ 'condensed' => '75%',
+ 'semi-condensed' => '87.5%',
+ 'normal' => '100%',
+ 'semi-expanded' => '112.5%',
+ 'expanded' => '125%',
+ 'extra-expanded' => '150%',
+ 'ultra-expanded' => '200%',
+ );
+ $font_stretch = str_replace( array_keys( $font_stretch_map ), array_values( $font_stretch_map ), $font_stretch );
+
+ $slug_elements = array( $font_family, $font_style, $font_weight, $font_stretch, $unicode_range );
+
+ $slug_elements = array_map(
+ function ( $elem ) {
+ // Remove quotes to normalize font-family names, and ';' to use as a separator.
+ $elem = trim( str_replace( array( '"', "'", ';' ), '', $elem ) );
+
+ // Normalize comma separated lists by removing whitespace in between items,
+ // but keep whitespace within items (e.g. "Open Sans" and "OpenSans" are different fonts).
+ // CSS spec for whitespace includes: U+000A LINE FEED, U+0009 CHARACTER TABULATION, or U+0020 SPACE,
+ // which by default are all matched by \s in PHP.
+ return preg_replace( '/,\s+/', ',', $elem );
+ },
+ $slug_elements
+ );
+
+ return sanitize_text_field( implode( ';', $slug_elements ) );
+ }
+
+ /**
+ * Sanitizes a tree of data using a schema.
+ *
+ * The schema structure should mirror the data tree. Each value provided in the
+ * schema should be a callable that will be applied to sanitize the corresponding
+ * value in the data tree. Keys that are in the data tree, but not present in the
+ * schema, will be removed in the sanitized data. Nested arrays are traversed recursively.
+ *
+ * @since 6.5.0
+ *
+ * @access private
+ *
+ * @param array $tree The data to sanitize.
+ * @param array $schema The schema used for sanitization.
+ * @return array The sanitized data.
+ */
+ public static function sanitize_from_schema( $tree, $schema ) {
+ if ( ! is_array( $tree ) || ! is_array( $schema ) ) {
+ return array();
+ }
+
+ foreach ( $tree as $key => $value ) {
+ // Remove keys not in the schema or with null/empty values.
+ if ( ! array_key_exists( $key, $schema ) ) {
+ unset( $tree[ $key ] );
+ continue;
+ }
+
+ $is_value_array = is_array( $value );
+ $is_schema_array = is_array( $schema[ $key ] ) && ! is_callable( $schema[ $key ] );
+
+ if ( $is_value_array && $is_schema_array ) {
+ if ( wp_is_numeric_array( $value ) ) {
+ // If indexed, process each item in the array.
+ foreach ( $value as $item_key => $item_value ) {
+ $tree[ $key ][ $item_key ] = isset( $schema[ $key ][0] ) && is_array( $schema[ $key ][0] )
+ ? self::sanitize_from_schema( $item_value, $schema[ $key ][0] )
+ : self::apply_sanitizer( $item_value, $schema[ $key ][0] );
+ }
+ } else {
+ // If it is an associative or indexed array, process as a single object.
+ $tree[ $key ] = self::sanitize_from_schema( $value, $schema[ $key ] );
+ }
+ } elseif ( ! $is_value_array && $is_schema_array ) {
+ // If the value is not an array but the schema is, remove the key.
+ unset( $tree[ $key ] );
+ } elseif ( ! $is_schema_array ) {
+ // If the schema is not an array, apply the sanitizer to the value.
+ $tree[ $key ] = self::apply_sanitizer( $value, $schema[ $key ] );
+ }
+
+ // Remove keys with null/empty values.
+ if ( empty( $tree[ $key ] ) ) {
+ unset( $tree[ $key ] );
+ }
+ }
+
+ return $tree;
+ }
+
+ /**
+ * Applies a sanitizer function to a value.
+ *
+ * @since 6.5.0
+ *
+ * @param mixed $value The value to sanitize.
+ * @param callable $sanitizer The sanitizer function to apply.
+ * @return mixed The sanitized value.
+ */
+ private static function apply_sanitizer( $value, $sanitizer ) {
+ if ( null === $sanitizer ) {
+ return $value;
+
+ }
+ return call_user_func( $sanitizer, $value );
+ }
+
+ /**
+ * Returns the expected mime-type values for font files, depending on PHP version.
+ *
+ * This is needed because font mime types vary by PHP version, so checking the PHP version
+ * is necessary until a list of valid mime-types for each file extension can be provided to
+ * the 'upload_mimes' filter.
+ *
+ * @since 6.5.0
+ *
+ * @access private
+ *
+ * @return string[] A collection of mime types keyed by file extension.
+ */
+ public static function get_allowed_font_mime_types() {
+ $php_7_ttf_mime_type = PHP_VERSION_ID >= 70300 ? 'application/font-sfnt' : 'application/x-font-ttf';
+
+ return array(
+ 'otf' => 'application/vnd.ms-opentype',
+ 'ttf' => PHP_VERSION_ID >= 70400 ? 'font/sfnt' : $php_7_ttf_mime_type,
+ 'woff' => PHP_VERSION_ID >= 80112 ? 'font/woff' : 'application/font-woff',
+ 'woff2' => PHP_VERSION_ID >= 80112 ? 'font/woff2' : 'application/font-woff2',
+ );
+ }
+}