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<?php |
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/** |
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* Processes typography-related fields |
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* and generates the google-font link. |
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* |
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* @package Kirki |
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* @category Core |
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* @author Aristeides Stathopoulos |
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* @copyright Copyright (c) 2017, Aristeides Stathopoulos |
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* @license http://opensource.org/licenses/https://opensource.org/licenses/MIT |
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* @since 1.0 |
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*/ |
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/** |
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* Manages the way Google Fonts are enqueued. |
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*/ |
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final class Kirki_Fonts_Google { |
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/** |
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* The Kirki_Fonts_Google instance. |
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* We use the singleton pattern here to avoid loading the google-font array multiple times. |
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* This is mostly a performance tweak. |
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* |
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* @access private |
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* @var null|object |
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*/ |
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private static $instance = null; |
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/** |
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* If set to true, forces loading ALL variants. |
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* |
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* @static |
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* @access public |
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* @var bool |
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*/ |
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public static $force_load_all_variants = false; |
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/** |
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* If set to true, forces loading ALL subsets. |
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* |
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* @static |
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* @access public |
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* @var bool |
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*/ |
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public static $force_load_all_subsets = false; |
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/** |
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* The array of fonts |
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* |
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* @access public |
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* @var array |
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*/ |
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public $fonts = array(); |
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/** |
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* An array of all google fonts. |
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* |
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* @access private |
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* @var array |
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*/ |
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private $google_fonts = array(); |
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/** |
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* The array of subsets |
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* |
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* @access public |
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* @var array |
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*/ |
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public $subsets = array(); |
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/** |
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* The class constructor. |
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*/ |
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private function __construct() { |
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$config = apply_filters( 'kirki/config', array() ); |
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// If we have set $config['disable_google_fonts'] to true then do not proceed any further. |
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if ( isset( $config['disable_google_fonts'] ) && true === $config['disable_google_fonts'] ) { |
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return; |
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} |
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// Populate the array of google fonts. |
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$this->google_fonts = Kirki_Fonts::get_google_fonts(); |
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} |
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/** |
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* Get the one, true instance of this class. |
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* Prevents performance issues since this is only loaded once. |
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* |
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* @return object Kirki_Fonts_Google |
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*/ |
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public static function get_instance() { |
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if ( null === self::$instance ) { |
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self::$instance = new Kirki_Fonts_Google(); |
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} |
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return self::$instance; |
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} |
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/** |
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* Processes the arguments of a field |
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* determines if it's a typography field |
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* and if it is, then takes appropriate actions. |
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* |
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* @param array $args The field arguments. |
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*/ |
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public function generate_google_font( $args ) { |
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// Process typography fields. |
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if ( isset( $args['type'] ) && 'kirki-typography' === $args['type'] ) { |
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// Get the value. |
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$value = Kirki_Values::get_sanitized_field_value( $args ); |
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// If we don't have a font-family then we can skip this. |
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if ( ! isset( $value['font-family'] ) ) { |
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return; |
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} |
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// Add support for older formats of the typography control. |
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// We used to have font-weight instead of variant. |
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if ( isset( $value['font-weight'] ) && ( ! isset( $value['variant'] ) || empty( $value['variant'] ) ) ) { |
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$value['variant'] = $value['font-weight']; |
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} |
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// Set a default value for variants. |
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if ( ! isset( $value['variant'] ) ) { |
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$value['variant'] = 'regular'; |
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} |
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if ( isset( $value['subsets'] ) ) { |
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// Add the subset directly to the array of subsets in the Kirki_GoogleFonts_Manager object. |
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// Subsets must be applied to ALL fonts if possible. |
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if ( ! is_array( $value['subsets'] ) ) { |
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$this->subsets[] = $value['subsets']; |
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} else { |
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foreach ( $value['subsets'] as $subset ) { |
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$this->subsets[] = $subset; |
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} |
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} |
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} |
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// Add the requested google-font. |
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if ( ! isset( $this->fonts[ $value['font-family'] ] ) ) { |
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$this->fonts[ $value['font-family'] ] = array(); |
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} |
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if ( ! in_array( $value['variant'], $this->fonts[ $value['font-family'] ], true ) ) { |
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$this->fonts[ $value['font-family'] ][] = $value['variant']; |
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} |
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} else { |
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// Process non-typography fields. |
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if ( isset( $args['output'] ) && is_array( $args['output'] ) ) { |
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foreach ( $args['output'] as $output ) { |
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// If we don't have a typography-related output argument we can skip this. |
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if ( ! isset( $output['property'] ) || ! in_array( $output['property'], array( 'font-family', 'font-weight', 'font-subset', 'subset', 'subsets' ), true ) ) { |
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continue; |
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} |
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// Get the value. |
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$value = Kirki_Values::get_sanitized_field_value( $args ); |
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if ( 'font-family' === $output['property'] ) { |
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if ( ! array_key_exists( $value, $this->fonts ) ) { |
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$this->fonts[ $value ] = array(); |
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} |
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} elseif ( 'font-weight' === $output['property'] ) { |
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foreach ( $this->fonts as $font => $variants ) { |
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if ( ! in_array( $value, $variants, true ) ) { |
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$this->fonts[ $font ][] = $value; |
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} |
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} |
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} elseif ( 'font-subset' === $output['property'] || 'subset' === $output['property'] || 'subsets' === $output['property'] ) { |
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if ( ! is_array( $value ) ) { |
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if ( ! in_array( $value, $this->subsets, true ) ) { |
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$this->subsets[] = $value; |
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} |
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} else { |
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foreach ( $value as $subset ) { |
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if ( ! in_array( $subset, $this->subsets, true ) ) { |
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$this->subsets[] = $subset; |
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} |
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} |
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} |
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} |
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} |
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} // End if(). |
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} // End if(). |
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} |
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/** |
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* Determines the vbalidity of the selected font as well as its properties. |
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* This is vital to make sure that the google-font script that we'll generate later |
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* does not contain any invalid options. |
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*/ |
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public function process_fonts() { |
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// Early exit if font-family is empty. |
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if ( empty( $this->fonts ) ) { |
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return; |
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} |
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$valid_subsets = array(); |
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foreach ( $this->fonts as $font => $variants ) { |
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// Determine if this is indeed a google font or not. |
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// If it's not, then just remove it from the array. |
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if ( ! array_key_exists( $font, $this->google_fonts ) ) { |
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unset( $this->fonts[ $font ] ); |
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continue; |
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} |
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// Get all valid font variants for this font. |
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$font_variants = array(); |
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if ( isset( $this->google_fonts[ $font ]['variants'] ) ) { |
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$font_variants = $this->google_fonts[ $font ]['variants']; |
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} |
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foreach ( $variants as $variant ) { |
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// If this is not a valid variant for this font-family |
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// then unset it and move on to the next one. |
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if ( ! in_array( $variant, $font_variants, true ) ) { |
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$variant_key = array_search( $variant, $this->fonts[ $font ] ); |
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unset( $this->fonts[ $font ][ $variant_key ] ); |
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continue; |
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} |
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} |
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// Check if the selected subsets exist, even in one of the selected fonts. |
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// If they don't, then they have to be removed otherwise the link will fail. |
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if ( isset( $this->google_fonts[ $font ]['subsets'] ) ) { |
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foreach ( $this->subsets as $subset ) { |
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if ( in_array( $subset, $this->google_fonts[ $font ]['subsets'], true ) ) { |
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$valid_subsets[] = $subset; |
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} |
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} |
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} |
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} |
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$this->subsets = $valid_subsets; |
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} |
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} |
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aristath /
kirki
