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<?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', ); } }

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