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<?php
/**
* Webfonts API: Provider abstract class.
*
* Individual webfonts providers should extend this class and implement.
*
* @package WordPress
* @subpackage WebFonts
* @since 6.0.0
*/
if ( class_exists( 'WP_Webfonts_Provider' ) ) {
return;
}
/**
* Abstract class for Webfonts API providers.
*
* The starting point to building a webfont service provider.
*
* What is a Provider?
*
* A provider contains the know-how (business logic) for how to
* process its specific font service (i.e. local or remote)
* and how to generate the `@font-face` styles for its service.
*
* It receives a collection of webfonts from the Controller
* {@see WP_Webfonts_Provider::set_setfonts()}, and when requested
* {@see WP_Webfonts_Provider::get_css()}, it transforms them
* into styles (in a performant way for the provider service
* it manages).
*
* @since 6.0.0
*/
abstract class WP_Webfonts_Provider {
/**
* Webfonts to be processed.
*
* @since 6.0.0
*
* @var array[]
*/
protected $webfonts = array();
/**
* Sets this provider's webfonts property.
*
* The API's Controller passes this provider's webfonts
* for processing here in the provider.
*
* @since 6.0.0
*
* @param array[] $webfonts Registered webfonts.
*/
public function set_webfonts( array $webfonts ) {
$this->webfonts = $webfonts;
}
/**
* Gets the `@font-face` CSS for the provider's webfonts.
*
* This method is where the provider does it processing to build the
* needed `@font-face` CSS for all of its webfonts. Specifics of how
* this processing is done is contained in each provider.
*
* @since 6.0.0
*
* @return string The `@font-face` CSS.
*/
abstract public function get_css();
}
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