155 lines
4.2 KiB
PHP
155 lines
4.2 KiB
PHP
<?php
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/**
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* WP_Font_Face_Resolver class.
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*
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* @package WordPress
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* @subpackage Fonts
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* @since 6.4.0
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*/
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/**
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* The Font Face Resolver abstracts the processing of different data sources
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* (such as theme.json) for processing within the Font Face.
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*
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* This class is for internal core usage and is not supposed to be used by
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* extenders (plugins and/or themes).
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*
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* @access private
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*/
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class WP_Font_Face_Resolver {
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/**
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* Gets fonts defined in theme.json.
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*
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* @since 6.4.0
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*
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* @return array Returns the font-families, each with their font-face variations.
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*/
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public static function get_fonts_from_theme_json() {
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$settings = wp_get_global_settings();
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// Bail out early if there are no font settings.
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if ( empty( $settings['typography']['fontFamilies'] ) ) {
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return array();
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}
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return static::parse_settings( $settings );
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}
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/**
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* Parse theme.json settings to extract font definitions with variations grouped by font-family.
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*
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* @since 6.4.0
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*
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* @param array $settings Font settings to parse.
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* @return array Returns an array of fonts, grouped by font-family.
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*/
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private static function parse_settings( array $settings ) {
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$fonts = array();
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foreach ( $settings['typography']['fontFamilies'] as $font_families ) {
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foreach ( $font_families as $definition ) {
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// Skip if font-family "name" is not defined.
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if ( empty( $definition['name'] ) ) {
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continue;
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}
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// Skip if "fontFace" is not defined, meaning there are no variations.
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if ( empty( $definition['fontFace'] ) ) {
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continue;
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}
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$font_family = $definition['name'];
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// Prepare the fonts array structure for this font-family.
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if ( ! array_key_exists( $font_family, $fonts ) ) {
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$fonts[ $font_family ] = array();
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}
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$fonts[ $font_family ] = static::convert_font_face_properties( $definition['fontFace'], $font_family );
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}
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}
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return $fonts;
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}
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/**
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* Converts font-face properties from theme.json format.
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*
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* @since 6.4.0
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*
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* @param array $font_face_definition The font-face definitions to convert.
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* @param string $font_family_property The value to store in the font-face font-family property.
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* @return array Converted font-face properties.
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*/
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private static function convert_font_face_properties( array $font_face_definition, $font_family_property ) {
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$converted_font_faces = array();
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foreach ( $font_face_definition as $font_face ) {
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// Add the font-family property to the font-face.
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$font_face['font-family'] = $font_family_property;
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// Converts the "file:./" src placeholder into a theme font file URI.
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if ( ! empty( $font_face['src'] ) ) {
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$font_face['src'] = static::to_theme_file_uri( (array) $font_face['src'] );
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}
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// Convert camelCase properties into kebab-case.
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$font_face = static::to_kebab_case( $font_face );
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$converted_font_faces[] = $font_face;
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}
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return $converted_font_faces;
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}
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/**
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* Converts each 'file:./' placeholder into a URI to the font file in the theme.
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*
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* The 'file:./' is specified in the theme's `theme.json` as a placeholder to be
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* replaced with the URI to the font file's location in the theme. When a "src"
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* beings with this placeholder, it is replaced, converting the src into a URI.
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*
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* @since 6.4.0
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*
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* @param array $src An array of font file sources to process.
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* @return array An array of font file src URI(s).
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*/
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private static function to_theme_file_uri( array $src ) {
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$placeholder = 'file:./';
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foreach ( $src as $src_key => $src_url ) {
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// Skip if the src doesn't start with the placeholder, as there's nothing to replace.
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if ( ! str_starts_with( $src_url, $placeholder ) ) {
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continue;
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}
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$src_file = str_replace( $placeholder, '', $src_url );
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$src[ $src_key ] = get_theme_file_uri( $src_file );
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}
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return $src;
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}
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/**
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* Converts all first dimension keys into kebab-case.
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*
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* @since 6.4.0
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*
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* @param array $data The array to process.
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* @return array Data with first dimension keys converted into kebab-case.
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*/
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private static function to_kebab_case( array $data ) {
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foreach ( $data as $key => $value ) {
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$kebab_case = _wp_to_kebab_case( $key );
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$data[ $kebab_case ] = $value;
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if ( $kebab_case !== $key ) {
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unset( $data[ $key ] );
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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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