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<?php
// Font settings deprecation message
require get_template_directory() . '/inc/customizer/wp-customize-fonts.php';
// Font Migration
require get_template_directory() . '/inc/fonts/custom-font-migration.php';
add_action( 'init', 'enqueue_global_styles_fonts', 100 );
add_action( 'admin_init', 'enqueue_fse_font_styles' );
add_filter( 'pre_render_block', 'enqueue_block_fonts', 10, 2 );
add_filter( 'jetpack_google_fonts_list', 'blockbase_filter_jetpack_google_fonts_list' );
$blockbase_enqueued_font_slugs = array();
/**
* Get the CSS containing font_face values for a given slug
*
* @return string String of CSS
*/
function get_style_css( $slug ) {
$font_face_file = get_template_directory() . '/assets/fonts/' . $slug . '/font-face.css';
if ( ! file_exists( $font_face_file ) ) {
return '';
}
$contents = file_get_contents( $font_face_file );
return str_replace( 'src: url(./', 'src: url(' . get_template_directory_uri() . '/assets/fonts/' . $slug . '/', $contents );
}
/**
* Collect fonts set in Global Styles settings.
*
* @return array Font faces from Global Styles settings.
*/
function collect_fonts_from_global_styles() {
// NOTE: We have to use gutenberg_get_global_styles() here due to the potential changes to Global Styles on page load happening in font migration.
// Since core users don't have anything to migrate we can use core get_styles
if ( function_exists( 'gutenberg_get_global_styles' ) ) {
$global_styles = gutenberg_get_global_styles();
} else {
$global_styles = wp_get_global_styles();
}
$found_webfonts = array();
// Look for fonts in block presets...
if ( isset( $global_styles['blocks'] ) ) {
foreach ( $global_styles['blocks'] as $setting ) {
$font_slug = extract_font_slug_from_setting( $setting );
if ( $font_slug ) {
$found_webfonts[] = $font_slug;
}
}
}
// Look for fonts in HTML element presets...
if ( isset( $global_styles['elements'] ) ) {
foreach ( $global_styles['elements'] as $setting ) {
// die(json_encode($global_styles));
// NOTE: It seems that the Global Styles assignment of fonts writes the font family string rather than the
// global styles shorthand that is assigned to the body. This should be confirmed and reported if it isn't already.
$font_slug = extract_font_slug_from_setting( $setting );
if ( $font_slug ) {
$found_webfonts[] = $font_slug;
}
}
}
// Check if a global typography setting was defined.
$font_slug = extract_font_slug_from_setting( $global_styles );
if ( $font_slug ) {
$found_webfonts[] = $font_slug;
}
return array_unique( $found_webfonts );
}
/**
* Extract the font family slug from a settings array.
*
* @param array $setting The settings object.
*
* @return string|null
*/
function extract_font_slug_from_setting( $setting ) {
if ( ! isset( $setting['typography']['fontFamily'] ) ) {
return null;
}
$font_family = $setting['typography']['fontFamily'];
// Full string: var(--wp--preset--font-family--slug).
// We do not care about the origin of the font, only its slug.
preg_match( '/font-family--(?P<slug>.+)\)$/', $font_family, $matches );
if ( isset( $matches['slug'] ) ) {
return $matches['slug'];
}
// Full string: var:preset|font-family|slug
// We do not care about the origin of the font, only its slug.
preg_match( '/font-family\|(?P<slug>.+)$/', $font_family, $matches );
if ( isset( $matches['slug'] ) ) {
return $matches['slug'];
}
return $font_family;
}
/**
* Build a list of all font slugs provided by Blockbase from theme.json
*
* @return array Collection of all font slugs defined in the theme.json file
*/
function collect_fonts_from_blockbase() {
$fonts = array();
$parent_theme_json_data = json_decode( file_get_contents( get_template_directory() . '/theme.json' ), true );
$font_families = $parent_theme_json_data['settings']['typography']['fontFamilies'];
foreach ( $font_families as $font ) {
// Only pick it up if we're claiming it as ours to manage
if ( array_key_exists( 'provider', $font ) && 'blockbase-fonts' === $font['provider'] ) {
$fonts[] = $font;
}
}
return $fonts;
}
/**
* Enqeue all of the fonts used in global styles settings.
*
* @return void
*/
function enqueue_global_styles_fonts() {
global $blockbase_enqueued_font_slugs;
$font_slugs = array();
$font_css = '';
if ( is_admin() ) {
$font_families = collect_fonts_from_blockbase();
foreach ( $font_families as $font_family ) {
$font_slugs[] = $font_family['slug'];
}
} else {
$font_slugs = collect_fonts_from_global_styles();
}
$blockbase_enqueued_font_slugs = $font_slugs;
foreach ( $font_slugs as $font_slug ) {
$font_css .= get_style_css( $font_slug );
}
// Bail out if there are no styles to enqueue.
if ( '' === $font_css ) {
return;
}
// Enqueue the stylesheet.
wp_register_style( 'blockbase_font_faces', '' );
wp_enqueue_style( 'blockbase_font_faces' );
// Add the styles to the stylesheet.
wp_add_inline_style( 'blockbase_font_faces', $font_css );
}
/**
* Enqueue all of the fonts provided by Blockbase for FSE use
*/
function enqueue_fse_font_styles( $fonts ) {
$fonts = collect_fonts_from_blockbase();
$font_css = '';
foreach ( $fonts as $font ) {
$font_css .= get_style_css( $font['slug'] );
}
wp_enqueue_style( 'wp-block-library' );
wp_add_inline_style( 'wp-block-library', $font_css );
}
/**
* Add fonts that have been assigned via CSS
*/
function enqueue_block_fonts( $content, $parsed_block ) {
global $blockbase_enqueued_font_slugs;
if ( ! is_admin() && isset( $parsed_block['attrs']['fontFamily'] ) ) {
$font_slug = $parsed_block['attrs']['fontFamily'];
if ( ! in_array( $font_slug, $blockbase_enqueued_font_slugs, true ) ) {
$font_css = get_style_css( $font_slug );
if ( $font_css ) {
$blockbase_enqueued_font_slugs[] = $font_slug;
wp_add_inline_style( 'blockbase_font_faces', $font_css );
}
}
}
return $content;
}
/**
* Jetpack may attempt to register fonts for the Google Font Provider.
* This filters out all of the fonts Blockbase has already registered.
*/
function blockbase_filter_jetpack_google_fonts_list( $jetpack_fonts ) {
$theme_fonts = collect_fonts_from_blockbase();
$theme_font_families = array_column( $theme_fonts, 'name' );
$filtered_list = array();
// If the Jetpack font isn't in theme already, let Jetpack register it
foreach ( $jetpack_fonts as $jetpack_font_family ) {
if ( ! in_array( $jetpack_font_family, $theme_font_families, true ) ) {
$filtered_list[] = $jetpack_font_family;
}
}
return $filtered_list;
}