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<?php
/**
* Processes typography-related fields
* and generates the google-font link.
*
* Modified version from the Kirki framework for use with the Avada theme.
*
* @package Kirki
* @category Core
* @author Aristeides Stathopoulos
* @copyright Copyright (c) 2016, Aristeides Stathopoulos
* @license http://opensource.org/licenses/https://opensource.org/licenses/MIT
* @since 1.0
*/
// Do not allow directly accessing this file.
if ( ! defined( 'ABSPATH' ) ) {
exit( 'Direct script access denied.' );
}
if ( ! class_exists( 'Avada_Google_Fonts' ) ) {
/**
* Manages the way Google Fonts are enqueued.
*/
final class Avada_Google_Fonts {
/**
* The array of fonts
*
* @access private
* @var array
*/
private $fonts = array();
/**
* An array of all google fonts.
*
* @static
* @access private
* @var array
*/
private $google_fonts = array();
/**
* The array of subsets
*
* @access private
* @var array
*/
private $subsets = array();
/**
* The google link
*
* @access private
* @var string
*/
private $link = '';
/**
* The class constructor.
*/
public function __construct() {
// Populate the array of google fonts.
$this->google_fonts = $this->get_google_fonts();
// Enqueue link.
add_action( 'wp_enqueue_scripts', array( $this, 'enqueue' ), 105 );
}
/**
* Calls all the other necessary methods to populate and create the link.
*/
public function enqueue() {
// Go through our fields and populate $this->fonts.
$this->loop_fields();
// Goes through $this->fonts and adds or removes things as needed.
$this->process_fonts();
// Go through $this->fonts and populate $this->link.
$this->create_link();
// If $this->link is not empty then enqueue it.
if ( '' !== $this->link ) {
wp_enqueue_style( 'avada_google_fonts', $this->link, array(), null );
}
}
/**
* Goes through all our fields and then populates the $this->fonts property.
*/
private function loop_fields() {
$fields = array(
'footer_headings_typography',
'nav_typography',
'button_typography',
'body_typography',
'h1_typography',
'h2_typography',
'h3_typography',
'h4_typography',
'h5_typography',
'h6_typography',
);
foreach ( $fields as $field ) {
$this->generate_google_font( $field );
}
}
/**
* Processes the field.
*
* @param array $field The field arguments.
*/
private function generate_google_font( $field ) {
// Get the value.
$value = Avada()->settings->get( $field );
// If we don't have a font-family then we can skip this.
if ( ! isset( $value['font-family'] ) ) {
return;
}
// Convert font-weight to variant.
if ( isset( $value['font-weight'] ) && ( ! isset( $value['variant'] ) || empty( $value['variant'] ) ) ) {
$value['variant'] = $value['font-weight'];
}
// Set a default value for variants.
if ( ! isset( $value['variant'] ) ) {
$value['variant'] = 'regular';
}
// Convert "400" to "regular".
if ( '400' === $value['variant'] ) {
$value['variant'] = 'regular';
}
if ( isset( $value['subsets'] ) ) {
// Add the subset directly to the array of subsets in the Kirki_GoogleFonts_Manager object.
// Subsets must be applied to ALL fonts if possible.
if ( ! is_array( $value['subsets'] ) ) {
$this->subsets[] = $value['subsets'];
} else {
foreach ( $value['subsets'] as $subset ) {
$this->subsets[] = $subset;
}
}
}
// Add the requested google-font.
if ( ! isset( $this->fonts[ $value['font-family'] ] ) ) {
$this->fonts[ $value['font-family'] ] = array();
}
if ( ! in_array( $value['variant'], $this->fonts[ $value['font-family'] ], true ) ) {
$this->fonts[ $value['font-family'] ][] = $value['variant'];
}
}
/**
* Determines the validity of the selected font as well as its properties.
* This is vital to make sure that the google-font script that we'll generate later
* does not contain any invalid options.
*/
private function process_fonts() {
// Early exit if font-family is empty.
if ( empty( $this->fonts ) ) {
return;
}
$valid_subsets = array();
foreach ( $this->fonts as $font => $variants ) {
// Determine if this is indeed a google font or not.
// If it's not, then just remove it from the array.
if ( ! array_key_exists( $font, $this->google_fonts ) ) {
unset( $this->fonts[ $font ] );
continue;
}
// Get all valid font variants for this font.
$font_variants = array();
if ( isset( $this->google_fonts[ $font ]['variants'] ) ) {
$font_variants = $this->google_fonts[ $font ]['variants'];
}
foreach ( $variants as $variant ) {
// If this is not a valid variant for this font-family
// then unset it and move on to the next one.
if ( ! in_array( $variant, $font_variants, true ) ) {
$variant_key = array_search( $variant, $this->fonts[ $font ] );
unset( $this->fonts[ $font ][ $variant_key ] );
continue;
}
}
// Check if the selected subsets exist, even in one of the selected fonts.
// If they don't, then they have to be removed otherwise the link will fail.
if ( isset( $this->google_fonts[ $font ]['subsets'] ) ) {
foreach ( $this->subsets as $subset ) {
if ( in_array( $subset, $this->google_fonts[ $font ]['subsets'], true ) ) {
$valid_subsets[] = $subset;
}
}
}
}
$this->subsets = $valid_subsets;
}
/**
* Creates the google-fonts link.
*/
private function create_link() {
// If we don't have any fonts then we can exit.
if ( empty( $this->fonts ) ) {
return;
}
// Get font-family + subsets.
$link_fonts = array();
foreach ( $this->fonts as $font => $variants ) {
$variants = implode( ',', $variants );
$link_font = str_replace( ' ', '+', $font );
if ( ! empty( $variants ) ) {
$link_font .= ':' . $variants;
}
$link_fonts[] = $link_font;
}
if ( ! empty( $this->subsets ) ) {
$this->subsets = array_unique( $this->subsets );
}
$this->link = add_query_arg( array(
'family' => str_replace( '%2B', '+', urlencode( implode( '|', $link_fonts ) ) ),
'subset' => urlencode( implode( ',', $this->subsets ) ),
), 'https://fonts.googleapis.com/css' );
}
/**
* Return an array of all available Google Fonts.
*
* @return array All Google Fonts.
*/
private function get_google_fonts() {
if ( null === $this->google_fonts || empty( $this->google_fonts ) ) {
$fonts = include_once wp_normalize_path( Avada::$template_dir_path . '/includes/avadaredux/custom-fields/typography/googlefonts-array.php' );
$google_fonts = array();
if ( is_array( $fonts ) ) {
foreach ( $fonts['items'] as $font ) {
$google_fonts[ $font['family'] ] = array(
'label' => $font['family'],
'variants' => $font['variants'],
'subsets' => $font['subsets'],
'category' => $font['category'],
);
}
}
$this->google_fonts = $google_fonts;
}
return $this->google_fonts;
}
}
}