| 1 |
<?php |
| 2 |
/** |
| 3 |
* Consolidator — the aggregate-and-replace engine. |
| 4 |
* |
| 5 |
* Instead of rewriting font URLs in place (which left protocol-relative URLs |
| 6 |
* behind, created @import chains, and produced malformed CSS), this runs ONE |
| 7 |
* pass that: |
| 8 |
* |
| 9 |
* 1. COLLECT — gather every Google/Bunny font source from <link> tags, |
| 10 |
* inline <style> (@import + remote @font-face), same-origin and |
| 11 |
* external CSS files, and JS web-font loaders. |
| 12 |
* 2. AGGREGATE— parse all sources into normalized variants, dedupe, and filter |
| 13 |
* by subset (inferred from unicode-range, comment-independent). |
| 14 |
* 3. HOST — download each unique woff2 once, register it, and build ONE |
| 15 |
* clean local stylesheet (correct font-display placement). |
| 16 |
* 4. APPLY — strip every original source and inject a single <link>. |
| 17 |
* |
| 18 |
* @package EasyFonts |
| 19 |
*/ |
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|
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namespace EasyFonts\Detect; |
| 22 |
|
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use EasyFonts\Fonts\Downloader; |
| 24 |
use EasyFonts\Fonts\Registry; |
| 25 |
use EasyFonts\Fonts\Storage; |
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use EasyFonts\Frontend\HtmlProcessor; |
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use EasyFonts\Parser\FontFaceParser; |
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use EasyFonts\Settings; |
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|
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defined( 'ABSPATH' ) || exit; |
| 31 |
|
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/** |
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* Detects, consolidates, and locally hosts web fonts. |
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*/ |
| 35 |
class Consolidator { |
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|
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/** |
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* @var FontFaceParser |
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*/ |
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private FontFaceParser $parser; |
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|
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/** |
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* @var Downloader |
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*/ |
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private Downloader $downloader; |
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|
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/** |
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* @var Storage |
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*/ |
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private Storage $storage; |
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|
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/** |
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* @var Registry |
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*/ |
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private Registry $registry; |
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|
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/** |
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* @var StylesheetFetcher |
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*/ |
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private StylesheetFetcher $fetcher; |
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|
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/** |
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* @var HtmlProcessor |
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*/ |
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private HtmlProcessor $html; |
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|
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/** |
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* Provider CSS URLs to fetch: url => provider. |
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* |
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* @var array<string,string> |
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*/ |
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private array $css_urls = array(); |
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|
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/** |
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* Raw remote @font-face CSS snippets found inline / in files: each [css, provider]. |
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* |
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* @var array<int,array{css:string,provider:string}> |
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*/ |
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private array $raw_blocks = array(); |
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|
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/** |
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* Exact <link> hrefs to physically remove. |
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* |
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* @var string[] |
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*/ |
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private array $remove_links = array(); |
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|
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/** |
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* Detector ids that contributed at least one source (for Auto-Config). |
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* |
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* @var array<string,bool> |
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*/ |
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private array $contributed = array(); |
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|
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/** |
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* Variants hosted this request (for fallbacks + usage logging). |
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* |
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* @var array<int,array{family:string,weight:string,style:string}> |
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*/ |
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private static array $touched = array(); |
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|
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/** |
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* Consolidated stylesheet URL produced by the most recent run ('' if none). |
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* |
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* @var string |
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*/ |
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private static string $stylesheet_url = ''; |
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|
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/** |
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* Cache-relative path of the consolidated stylesheet from the most recent |
| 111 |
* run ('' if none). Used by the output buffer to inline the CSS. |
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* |
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* @var string |
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*/ |
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private static string $stylesheet_file = ''; |
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|
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/** |
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* Fonts touched this request. |
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* |
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* @return array<int,array{family:string,weight:string,style:string}> |
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*/ |
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public static function touched(): array { |
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return self::$touched; |
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} |
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|
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/** |
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* Consolidated stylesheet URL from the most recent run. |
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* |
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* @return string |
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*/ |
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public static function stylesheet_url(): string { |
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return self::$stylesheet_url; |
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} |
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|
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/** |
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* Cache-relative path of the consolidated stylesheet from the most recent |
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* run ('' if none). |
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* |
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* @return string |
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*/ |
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public static function stylesheet_file(): string { |
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return self::$stylesheet_file; |
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} |
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|
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/** |
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* Constructor. |
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*/ |
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public function __construct() { |
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$this->parser = new FontFaceParser(); |
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$this->downloader = new Downloader(); |
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$this->storage = new Storage(); |
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$this->registry = new Registry(); |
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$this->fetcher = new StylesheetFetcher(); |
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$this->html = new HtmlProcessor(); |
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} |
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|
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/** |
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* Run the full consolidation pass over a document. |
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* |
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* @param string $html Full HTML. |
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* @param bool $force Reserved (probe mode); detection is identical. |
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* @return string |
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*/ |
| 164 |
public function run( string $html, bool $force = false ): string { |
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unset( $force ); |
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|
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self::$stylesheet_url = ''; |
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self::$stylesheet_file = ''; |
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|
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// 1. COLLECT (each step may rewrite the HTML — e.g. strip inline blocks). |
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$html = $this->collect_from_links( $html ); |
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$html = $this->collect_from_inline( $html ); |
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$html = $this->collect_from_webfont( $html ); |
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$this->collect_async_urls(); |
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|
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// Physically remove the provider <link> tags we flagged. |
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$html = $this->html->remove_stylesheet_links( $html, array_values( array_unique( $this->remove_links ) ) ); |
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|
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if ( empty( $this->css_urls ) && empty( $this->raw_blocks ) ) { |
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return $html; |
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} |
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|
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// 2. AGGREGATE. |
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$variants = $this->aggregate(); |
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|
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if ( empty( $variants ) ) { |
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return $html; |
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} |
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|
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// 3. HOST (register + build the consolidated stylesheet). |
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$file_url = $this->host( $variants ); |
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|
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if ( null === $file_url ) { |
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return $html; |
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} |
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|
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// Record for the output buffer, which injects preloads + the stylesheet |
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// + fallbacks together in the correct order. (We don't inject here so the |
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// preloads can be positioned ABOVE the stylesheet.) |
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self::$stylesheet_url = $file_url; |
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|
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foreach ( array_keys( $this->contributed ) as $id ) { |
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Settings::learn_detector( $id ); |
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} |
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|
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return $html; |
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} |
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|
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/* --------------------------------------------------------------------- * |
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* 1. COLLECT |
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* --------------------------------------------------------------------- */ |
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|
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/** |
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* Walk <link> tags: flag provider stylesheets for removal, and rewrite |
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* same-origin/external CSS files that hide provider fonts to cleaned copies. |
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* |
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* @param string $html HTML. |
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* @return string |
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*/ |
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private function collect_from_links( string $html ): string { |
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$result = $this->html->rewrite_stylesheet_links( |
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$html, |
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function ( $href ) { |
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$url = Providers::normalize_url( $href ); |
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|
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// Direct provider stylesheet → consolidated pipeline (removed + |
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// re-emitted as one clean local sheet). |
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if ( Providers::is_css_url( $url ) ) { |
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$this->add_css_url( $url, 'link' ); |
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$this->remove_links[] = $href; |
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return null; |
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} |
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|
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// A real CSS file (theme/plugin) that may hide provider fonts in |
| 235 |
// @import or @font-face rules. |
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if ( $this->fetcher->is_skippable( $url ) ) { |
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return null; |
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} |
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|
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$is_local = $this->fetcher->is_local( $url ); |
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$css = $is_local |
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? $this->fetcher->read_local( $url ) |
| 243 |
: $this->fetcher->read_external( $url, $this->downloader ); |
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|
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if ( null === $css || ! $this->mentions_provider( $css ) ) { |
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return null; |
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} |
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|
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$detector = $is_local ? 'local_css' : 'external_css'; |
| 250 |
|
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// Localise IN PLACE: download the provider fonts, rewrite their |
| 252 |
// @font-face src to local URLs, inline any provider @import (also |
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// localised). The rest of the file is preserved, so the sheet stays |
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// in its original cascade position — just self-hosted now. |
| 255 |
$localized = $this->localize_stylesheet( $css, $url ); |
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|
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if ( null === $localized ) { |
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return null; |
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} |
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|
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// Save the localised copy in a clean css/ folder (no doubled-hash |
| 262 |
// folder, which security scanners flag). |
| 263 |
$filename = 'css/ext-' . substr( hash( 'sha256', $url ), 0, 18 ) . '.css'; |
| 264 |
|
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if ( ! $this->storage->write( $filename, $localized ) ) { |
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return null; |
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} |
| 268 |
|
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$this->mark( $detector ); |
| 270 |
|
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return add_query_arg( 'ver', Settings::buster(), $this->storage->url( $filename ) ); |
| 272 |
} |
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); |
| 274 |
|
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return $result['html']; |
| 276 |
} |
| 277 |
|
| 278 |
/** |
| 279 |
* Walk inline <style> blocks: pull provider @import URLs and remote |
| 280 |
* @font-face blocks out, leaving the rest of the CSS (e.g. Font Awesome) |
| 281 |
* untouched. |
| 282 |
* |
| 283 |
* @param string $html HTML. |
| 284 |
* @return string |
| 285 |
*/ |
| 286 |
private function collect_from_inline( string $html ): string { |
| 287 |
$result = $this->html->rewrite_style_blocks( |
| 288 |
$html, |
| 289 |
function ( $css ) { |
| 290 |
$original = $css; |
| 291 |
|
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// Provider @import → collect + remove the statement. |
| 293 |
$css = (string) preg_replace_callback( |
| 294 |
'/@import\s+(?:url\(\s*)?[\'"]?([^\'")\s]+)[\'"]?\s*\)?\s*;?/i', |
| 295 |
function ( $m ) { |
| 296 |
$url = Providers::normalize_url( $m[1] ); |
| 297 |
|
| 298 |
if ( Providers::is_css_url( $url ) ) { |
| 299 |
$this->add_css_url( $url, 'inline' ); |
| 300 |
return ''; |
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} |
| 302 |
|
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return $m[0]; |
| 304 |
}, |
| 305 |
$css |
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); |
| 307 |
|
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// Remote @font-face → collect raw block + remove it. |
| 309 |
$blocks = $this->parser->blocks( $css ); |
| 310 |
|
| 311 |
foreach ( $blocks as $block ) { |
| 312 |
if ( $this->parser->is_remote_origin( $block['full'] ) ) { |
| 313 |
$this->raw_blocks[] = array( |
| 314 |
'css' => $block['full'], |
| 315 |
'provider' => Providers::id_for( $block['full'] ), |
| 316 |
); |
| 317 |
$css = str_replace( $block['full'], '', $css ); |
| 318 |
$this->mark( 'inline' ); |
| 319 |
} |
| 320 |
} |
| 321 |
|
| 322 |
return $css === $original ? null : $css; |
| 323 |
} |
| 324 |
); |
| 325 |
|
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return $result['html']; |
| 327 |
} |
| 328 |
|
| 329 |
/** |
| 330 |
* Detect the JS Web Font Loader, convert its config to a provider CSS URL, |
| 331 |
* and neutralise the loader scripts. |
| 332 |
* |
| 333 |
* @param string $html HTML. |
| 334 |
* @return string |
| 335 |
*/ |
| 336 |
private function collect_from_webfont( string $html ): string { |
| 337 |
if ( false === stripos( $html, 'WebFont' ) && false === stripos( $html, 'webfont.js' ) ) { |
| 338 |
return $html; |
| 339 |
} |
| 340 |
|
| 341 |
// Match the Google config object in either authoring style: |
| 342 |
// WebFontConfig['google'] = { families: [...] } (bracket assignment) |
| 343 |
// ... google: { families: [...] } ... (object literal) |
| 344 |
// The object body has no nested braces (families uses [ ]), so [^{}] is safe. |
| 345 |
if ( ! preg_match( |
| 346 |
'/(?:WebFontConfig\s*\[\s*[\'"]google[\'"]\s*\]\s*=\s*|[\'"]?google[\'"]?\s*:\s*)(\{[^{}]*\})/is', |
| 347 |
$html, |
| 348 |
$m |
| 349 |
) ) { |
| 350 |
return $html; |
| 351 |
} |
| 352 |
|
| 353 |
// HTML-decode the captured object (&subset=latin → &subset=latin) |
| 354 |
// BEFORE parsing, or the entity breaks family/subset extraction. |
| 355 |
$block = html_entity_decode( $m[1], ENT_QUOTES | ENT_HTML5 ); |
| 356 |
|
| 357 |
if ( ! preg_match( '/families\s*:\s*\[(.*?)\]/is', $block, $fm ) ) { |
| 358 |
return $html; |
| 359 |
} |
| 360 |
|
| 361 |
$families = array(); |
| 362 |
$subsets = array(); |
| 363 |
|
| 364 |
if ( preg_match_all( '/[\'"]([^\'"]+)[\'"]/', $fm[1], $items ) ) { |
| 365 |
foreach ( $items[1] as $item ) { |
| 366 |
$parsed = $this->webfont_family_to_spec( $item ); |
| 367 |
|
| 368 |
if ( ! empty( $parsed['family'] ) ) { |
| 369 |
$families[] = $parsed; |
| 370 |
|
| 371 |
if ( '' !== $parsed['subset'] ) { |
| 372 |
$subsets = array_merge( $subsets, explode( ',', $parsed['subset'] ) ); |
| 373 |
} |
| 374 |
} |
| 375 |
} |
| 376 |
} |
| 377 |
|
| 378 |
if ( empty( $families ) ) { |
| 379 |
return $html; |
| 380 |
} |
| 381 |
|
| 382 |
// Build a modern Google CSS2 request. CSS2 is the endpoint the rest of the |
| 383 |
// pipeline is proven against (subset comments + unicode-ranges parse |
| 384 |
// cleanly), unlike the legacy v1 /css endpoint. Each family becomes a |
| 385 |
// `family=Name:ital,wght@…` parameter. Subsets from the config travel as a |
| 386 |
// global &subset= param; aggregate() merges in user-selected subsets too. |
| 387 |
$url = $this->build_css2_url( $families ); |
| 388 |
|
| 389 |
if ( '' === $url ) { |
| 390 |
return $html; |
| 391 |
} |
| 392 |
|
| 393 |
$subsets = array_values( array_unique( array_filter( $subsets ) ) ); |
| 394 |
|
| 395 |
if ( ! empty( $subsets ) ) { |
| 396 |
$url .= '&subset=' . implode( ',', $subsets ); |
| 397 |
} |
| 398 |
|
| 399 |
$this->add_css_url( $url, 'webfont' ); |
| 400 |
$this->mark( 'webfont' ); |
| 401 |
|
| 402 |
// Remove webfont.js loader scripts + the WebFontConfig block. |
| 403 |
$html = (string) preg_replace( '#<script\b[^>]*\bsrc=[\'"][^\'"]*webfont(?:\.min)?\.js[\'"][^>]*>\s*</script>#i', '', $html ); |
| 404 |
$html = (string) preg_replace( '#<script\b[^>]*>(?:(?!</script>).)*?WebFontConfig(?:(?!</script>).)*?</script>#is', '', $html ); |
| 405 |
|
| 406 |
return $html; |
| 407 |
} |
| 408 |
|
| 409 |
/** |
| 410 |
* Convert one Web Font Loader families[] entry into a structured spec: |
| 411 |
* { family: 'Open Sans', weights: ['400','700'], italics: ['400'], subset: '' } |
| 412 |
* |
| 413 |
* Handles plain names, weight lists, FVD notation ("n4"/"i7"), a trailing |
| 414 |
* "&subset=" / ":subset" segment, URL-encoded names ("%2C"), and skips font |
| 415 |
* stacks / generic families (e.g. "Tahoma,Geneva, sans-serif"). |
| 416 |
* |
| 417 |
* @param string $entry Raw families[] entry. |
| 418 |
* @return array{family:string,weights:string[],italics:string[],subset:string} |
| 419 |
*/ |
| 420 |
private function webfont_family_to_spec( string $entry ): array { |
| 421 |
$none = array( 'family' => '', 'weights' => array(), 'italics' => array(), 'subset' => '' ); |
| 422 |
$entry = html_entity_decode( trim( $entry ), ENT_QUOTES | ENT_HTML5 ); |
| 423 |
|
| 424 |
if ( '' === $entry ) { |
| 425 |
return $none; |
| 426 |
} |
| 427 |
|
| 428 |
// Pull off a &subset= / &subsets= query suffix and capture it. |
| 429 |
$subset = ''; |
| 430 |
|
| 431 |
if ( preg_match( '/[&?]subsets?=([a-z0-9,\-]+)/i', $entry, $sm ) ) { |
| 432 |
$subset = strtolower( $sm[1] ); |
| 433 |
} |
| 434 |
|
| 435 |
$entry = (string) preg_replace( '/[&?].*$/', '', $entry ); // drop the query part. |
| 436 |
|
| 437 |
$parts = explode( ':', $entry ); |
| 438 |
$family_raw = rawurldecode( trim( $parts[0] ) ); // %2C → ",". |
| 439 |
|
| 440 |
// Skip font stacks / generic families — not Google fonts. |
| 441 |
if ( false !== strpos( $family_raw, ',' ) ) { |
| 442 |
return $none; |
| 443 |
} |
| 444 |
|
| 445 |
$lc = strtolower( trim( $family_raw ) ); |
| 446 |
|
| 447 |
if ( in_array( $lc, array( 'sans-serif', 'serif', 'monospace', 'cursive', 'fantasy', 'system-ui', '-apple-system', 'blinkmacsystemfont', 'inherit', 'initial' ), true ) ) { |
| 448 |
return $none; |
| 449 |
} |
| 450 |
|
| 451 |
$family = trim( $family_raw ); |
| 452 |
|
| 453 |
if ( '' === $family ) { |
| 454 |
return $none; |
| 455 |
} |
| 456 |
|
| 457 |
// A third colon segment is a subset list in WebFont loader syntax. |
| 458 |
if ( isset( $parts[2] ) && '' !== trim( $parts[2] ) ) { |
| 459 |
$third = strtolower( trim( $parts[2] ) ); |
| 460 |
$subset = '' !== $subset ? $subset . ',' . $third : $third; |
| 461 |
} |
| 462 |
|
| 463 |
// Weights (second segment) → split into upright + italic numeric lists. |
| 464 |
$weights = array(); |
| 465 |
$italics = array(); |
| 466 |
|
| 467 |
if ( isset( $parts[1] ) && '' !== trim( $parts[1] ) ) { |
| 468 |
foreach ( explode( ',', $parts[1] ) as $token ) { |
| 469 |
$token = trim( $token ); |
| 470 |
|
| 471 |
if ( preg_match( '/^([nio])([1-9])$/i', $token, $fvd ) ) { |
| 472 |
$w = $fvd[2] . '00'; |
| 473 |
'i' === strtolower( $fvd[1] ) ? $italics[] = $w : $weights[] = $w; |
| 474 |
} elseif ( preg_match( '/^(\d{3})italic$/i', $token, $wm ) ) { |
| 475 |
$italics[] = $wm[1]; |
| 476 |
} elseif ( preg_match( '/^\d{3}$/', $token ) ) { |
| 477 |
$weights[] = $token; |
| 478 |
} elseif ( 'bold' === strtolower( $token ) ) { |
| 479 |
$weights[] = '700'; |
| 480 |
} elseif ( in_array( strtolower( $token ), array( 'regular', 'normal' ), true ) ) { |
| 481 |
$weights[] = '400'; |
| 482 |
} elseif ( 'italic' === strtolower( $token ) ) { |
| 483 |
$italics[] = '400'; |
| 484 |
} |
| 485 |
} |
| 486 |
} |
| 487 |
|
| 488 |
// Default to a single upright 400 if no weight was specified. |
| 489 |
if ( empty( $weights ) && empty( $italics ) ) { |
| 490 |
$weights[] = '400'; |
| 491 |
} |
| 492 |
|
| 493 |
return array( |
| 494 |
'family' => $family, |
| 495 |
'weights' => array_values( array_unique( $weights ) ), |
| 496 |
'italics' => array_values( array_unique( $italics ) ), |
| 497 |
'subset' => $subset, |
| 498 |
); |
| 499 |
} |
| 500 |
|
| 501 |
/** |
| 502 |
* Build a single Google CSS2 URL from structured family specs. |
| 503 |
* |
| 504 |
* Produces e.g. |
| 505 |
* https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,400;0,700;1,400&family=Roboto:wght@400&display=swap |
| 506 |
* |
| 507 |
* @param array<int,array{family:string,weights:string[],italics:string[],subset:string}> $families Specs. |
| 508 |
* @return string CSS2 URL, or '' if no families. |
| 509 |
*/ |
| 510 |
private function build_css2_url( array $families ): string { |
| 511 |
$params = array(); |
| 512 |
|
| 513 |
foreach ( $families as $spec ) { |
| 514 |
$name = str_replace( ' ', '+', $spec['family'] ); |
| 515 |
|
| 516 |
if ( '' === $name ) { |
| 517 |
continue; |
| 518 |
} |
| 519 |
|
| 520 |
$uprights = $spec['weights']; |
| 521 |
$italics = $spec['italics']; |
| 522 |
|
| 523 |
if ( ! empty( $italics ) ) { |
| 524 |
// Mixed axis: must list every tuple as ital,wght and sort ascending. |
| 525 |
$tuples = array(); |
| 526 |
|
| 527 |
foreach ( $uprights as $w ) { |
| 528 |
$tuples[] = '0,' . $w; |
| 529 |
} |
| 530 |
|
| 531 |
foreach ( $italics as $w ) { |
| 532 |
$tuples[] = '1,' . $w; |
| 533 |
} |
| 534 |
|
| 535 |
sort( $tuples ); // CSS2 requires ascending tuple order. |
| 536 |
$params[] = $name . ':ital,wght@' . implode( ';', $tuples ); |
| 537 |
} else { |
| 538 |
// Upright only. |
| 539 |
$ws = $uprights; |
| 540 |
sort( $ws, SORT_STRING ); |
| 541 |
$params[] = $name . ':wght@' . implode( ';', $ws ); |
| 542 |
} |
| 543 |
} |
| 544 |
|
| 545 |
if ( empty( $params ) ) { |
| 546 |
return ''; |
| 547 |
} |
| 548 |
|
| 549 |
$display = (string) Settings::get( 'font_display', 'swap' ); |
| 550 |
|
| 551 |
return 'https://fonts.googleapis.com/css2?family=' . implode( '&family=', $params ) . '&display=' . $display; |
| 552 |
} |
| 553 |
|
| 554 |
/** |
| 555 |
* Fold in Google/Bunny CSS URLs that were injected by JavaScript at runtime |
| 556 |
* and reported by async-blocker.js (stored via REST /async-fonts). These |
| 557 |
* never appear in the server-rendered HTML, so this is how arbitrary |
| 558 |
* JS-loaded fonts get self-hosted — closing the one detection gap versus a |
| 559 |
* pure output-buffer scanner. |
| 560 |
* |
| 561 |
* @return void |
| 562 |
*/ |
| 563 |
private function collect_async_urls(): void { |
| 564 |
if ( ! Settings::get( 'async_blocker', 0 ) ) { |
| 565 |
return; |
| 566 |
} |
| 567 |
|
| 568 |
$urls = (array) get_option( 'easyfonts_async_urls', array() ); |
| 569 |
|
| 570 |
foreach ( $urls as $url ) { |
| 571 |
$url = Providers::normalize_url( (string) $url ); |
| 572 |
|
| 573 |
if ( Providers::is_css_url( $url ) ) { |
| 574 |
$this->add_css_url( $url, 'async' ); |
| 575 |
} |
| 576 |
} |
| 577 |
} |
| 578 |
|
| 579 |
/** |
| 580 |
* Parse every collected source into normalized, deduped, subset-filtered |
| 581 |
* variants. |
| 582 |
* |
| 583 |
* @return array<string,array<string,mixed>> Keyed by variant_key. |
| 584 |
*/ |
| 585 |
private function aggregate(): array { |
| 586 |
$variants = array(); |
| 587 |
$subsets = $this->effective_subsets(); |
| 588 |
|
| 589 |
// Provider CSS URLs → fetch + parse. Google v1 URLs are augmented so the |
| 590 |
// API actually returns the non-latin subsets the user enabled. |
| 591 |
foreach ( $this->css_urls as $url => $provider ) { |
| 592 |
$css = $this->downloader->fetch_css( $this->augment_v1_subsets( $url, $subsets ) ); |
| 593 |
|
| 594 |
if ( null === $css ) { |
| 595 |
continue; |
| 596 |
} |
| 597 |
|
| 598 |
$this->collect_variants( $css, $provider, $subsets, $variants, $url ); |
| 599 |
} |
| 600 |
|
| 601 |
// Raw inline @font-face snippets → parse directly. |
| 602 |
foreach ( $this->raw_blocks as $block ) { |
| 603 |
$this->collect_variants( $block['css'], $block['provider'], $subsets, $variants, '' ); |
| 604 |
} |
| 605 |
|
| 606 |
return $variants; |
| 607 |
} |
| 608 |
|
| 609 |
/** |
| 610 |
* Parse CSS into variants and merge them into the accumulator. |
| 611 |
* |
| 612 |
* @param string $css CSS. |
| 613 |
* @param string $provider Provider id. |
| 614 |
* @param string[] $subsets Allowed subsets. |
| 615 |
* @param array<string,array<string,mixed>> $variants Accumulator (by ref). |
| 616 |
* @param string $source Source URL (for provenance). |
| 617 |
*/ |
| 618 |
private function collect_variants( string $css, string $provider, array $subsets, array &$variants, string $source ): void { |
| 619 |
$blocks = $this->parser->blocks( $css ); |
| 620 |
$variable_map = $this->parser->variable_families( $blocks ); |
| 621 |
|
| 622 |
foreach ( $blocks as $block ) { |
| 623 |
$props = $this->parser->properties( $block['body'] ); |
| 624 |
$family = $props['family']; |
| 625 |
$src = $props['src']; |
| 626 |
|
| 627 |
if ( '' === $family || '' === $src ) { |
| 628 |
continue; |
| 629 |
} |
| 630 |
|
| 631 |
$src = Providers::normalize_url( $src, $source ); |
| 632 |
|
| 633 |
// Subset: prefer the Google /* comment */, else infer from range. |
| 634 |
$subset = isset( $block['lead'] ) ? $this->clean_subset( $block['lead'] ) : ''; |
| 635 |
|
| 636 |
if ( '' === $subset ) { |
| 637 |
$subset = FontFaceParser::subset_from_unicode_range( $props['unicode_range'] ); |
| 638 |
} |
| 639 |
|
| 640 |
// Filter by the EFFECTIVE subset set (user selection + latin baseline, |
| 641 |
// computed by the caller). latin/latin-ext are always kept, so enabling |
| 642 |
// an extra script (e.g. cyrillic) never drops a latin-only font. Unknown |
| 643 |
// subset ('') is always kept (we can't tell what it is). |
| 644 |
if ( '' !== $subset && ! in_array( $subset, $subsets, true ) ) { |
| 645 |
continue; |
| 646 |
} |
| 647 |
|
| 648 |
$is_variable = isset( $variable_map[ strtolower( $family ) ] ) |
| 649 |
|| (bool) preg_match( '/\d+\s+\d+/', $props['weight'] ); |
| 650 |
|
| 651 |
$subset_key = '' !== $subset ? $subset : 'latin'; |
| 652 |
$key = Registry::variant_key( $family, $props['weight'], $props['style'], $subset_key ); |
| 653 |
|
| 654 |
// First write wins; identical variants from multiple sources collapse. |
| 655 |
if ( isset( $variants[ $key ] ) ) { |
| 656 |
continue; |
| 657 |
} |
| 658 |
|
| 659 |
$variants[ $key ] = array( |
| 660 |
'family' => $family, |
| 661 |
'weight' => $props['weight'], |
| 662 |
'style' => $props['style'], |
| 663 |
'subset' => $subset_key, |
| 664 |
'src' => $src, |
| 665 |
'unicode_range' => $props['unicode_range'], |
| 666 |
'is_variable' => $is_variable, |
| 667 |
'provider' => $provider, |
| 668 |
'source' => $source, |
| 669 |
); |
| 670 |
} |
| 671 |
} |
| 672 |
|
| 673 |
/* --------------------------------------------------------------------- * |
| 674 |
* 3. HOST |
| 675 |
* --------------------------------------------------------------------- */ |
| 676 |
|
| 677 |
/** |
| 678 |
* Register every variant and write one consolidated stylesheet. The file is |
| 679 |
* keyed by the variant set + display + subsets, so pages sharing fonts share |
| 680 |
* the file. |
| 681 |
* |
| 682 |
* Registration runs for EVERY variant on every request (idempotent upsert), |
| 683 |
* even when the consolidated file already exists — so the hosted-fonts list |
| 684 |
* can't drift out of sync with what's actually served. Font binaries are |
| 685 |
* downloaded only when missing. Metric extraction is deliberately NOT done |
| 686 |
* here; it runs off the page-render path (see MetricsBackfill). |
| 687 |
* |
| 688 |
* @param array<string,array<string,mixed>> $variants Variants by key. |
| 689 |
* @return string|null Local stylesheet URL (cache-busted), or null. |
| 690 |
*/ |
| 691 |
private function host( array $variants ): ?string { |
| 692 |
$keys = array_keys( $variants ); |
| 693 |
sort( $keys ); |
| 694 |
|
| 695 |
$display = (string) Settings::get( 'font_display', 'swap' ); |
| 696 |
$subsets = implode( ',', (array) Settings::get( 'subsets', array() ) ); |
| 697 |
|
| 698 |
$disabled = $this->registry->disabled_keys(); |
| 699 |
|
| 700 |
// Fold the disabled set into the cache key so enabling/disabling a |
| 701 |
// variant yields a different stylesheet filename (no stale CSS served). |
| 702 |
$disabled_sig = implode( ',', array_keys( array_intersect_key( array_flip( $keys ), $disabled ) ) ); |
| 703 |
$hash = substr( hash( 'sha256', implode( '|', $keys ) . '|' . $display . '|' . $subsets . '|x:' . $disabled_sig ), 0, 20 ); |
| 704 |
|
| 705 |
// Consolidated stylesheet lives in a readable `css/` folder (no doubled |
| 706 |
// hash folder, which security scanners flag). Font binaries live under |
| 707 |
// `fonts/{family}/…` so identical variants are shared across stylesheets. |
| 708 |
$file = 'css/' . $hash . '.css'; |
| 709 |
$file_exists = $this->storage->exists( $file ); |
| 710 |
|
| 711 |
$css = "/**\n * Auto Generated by EasyFonts\n * @url: https://fluxpress.io\n */\n"; |
| 712 |
$hosted = 0; |
| 713 |
|
| 714 |
foreach ( $variants as $key => $v ) { |
| 715 |
// User-disabled variant: keep it registered (so it shows in the |
| 716 |
// "unused/disabled" list to re-enable) but don't download, don't add |
| 717 |
// to the stylesheet, and don't preload. |
| 718 |
$is_disabled = isset( $disabled[ $key ] ); |
| 719 |
|
| 720 |
$basename = $this->basename_for( $v ); |
| 721 |
$font_file = $this->locate_font( $basename ); |
| 722 |
$size = $font_file ? $this->storage->size( $font_file ) : 0; |
| 723 |
|
| 724 |
if ( ! $is_disabled && null === $font_file ) { |
| 725 |
$download = $this->downloader->fetch_font( $v['src'], $basename, $this->storage ); |
| 726 |
|
| 727 |
if ( null === $download ) { |
| 728 |
continue; |
| 729 |
} |
| 730 |
|
| 731 |
$font_file = $download['file']; |
| 732 |
$size = $download['size']; |
| 733 |
} |
| 734 |
|
| 735 |
$this->registry->upsert( |
| 736 |
array( |
| 737 |
'family' => $v['family'], |
| 738 |
'weight' => $v['weight'], |
| 739 |
'style' => $v['style'], |
| 740 |
'subset' => $v['subset'], |
| 741 |
'is_variable' => $v['is_variable'], |
| 742 |
'provider' => $v['provider'], |
| 743 |
'css_file' => $file, |
| 744 |
'font_file' => (string) $font_file, |
| 745 |
'file_size' => $size, |
| 746 |
'source_url' => $v['source'], |
| 747 |
) |
| 748 |
); |
| 749 |
|
| 750 |
if ( $is_disabled || null === $font_file ) { |
| 751 |
continue; |
| 752 |
} |
| 753 |
|
| 754 |
$local_url = add_query_arg( 'ver', Settings::buster(), $this->storage->url( $font_file ) ); |
| 755 |
$css .= $this->build_face_rule( $v, $local_url, $display ); |
| 756 |
|
| 757 |
self::$touched[] = array( |
| 758 |
'family' => $v['family'], |
| 759 |
'weight' => $v['weight'], |
| 760 |
'style' => $v['style'], |
| 761 |
); |
| 762 |
|
| 763 |
$hosted++; |
| 764 |
} |
| 765 |
|
| 766 |
if ( 0 === $hosted ) { |
| 767 |
return null; |
| 768 |
} |
| 769 |
|
| 770 |
// Rewrite the stylesheet whenever the enabled set might have changed |
| 771 |
// (cheap; keyed file means content is deterministic for a given set). |
| 772 |
if ( ! $file_exists ) { |
| 773 |
if ( ! $this->storage->write( $file, $css ) ) { |
| 774 |
return null; |
| 775 |
} |
| 776 |
} |
| 777 |
|
| 778 |
self::$stylesheet_file = $file; |
| 779 |
|
| 780 |
return add_query_arg( 'ver', Settings::buster(), $this->storage->url( $file ) ); |
| 781 |
} |
| 782 |
|
| 783 |
/** |
| 784 |
* Find an already-downloaded font file for a basename (any known extension). |
| 785 |
* |
| 786 |
* @param string $basename Cache-relative basename (no extension). |
| 787 |
* @return string|null Cache-relative filename, or null if none. |
| 788 |
*/ |
| 789 |
private function locate_font( string $basename ): ?string { |
| 790 |
foreach ( array( 'woff2', 'woff', 'ttf', 'otf' ) as $ext ) { |
| 791 |
$candidate = $basename . '.' . $ext; |
| 792 |
|
| 793 |
if ( $this->storage->exists( $candidate ) ) { |
| 794 |
return $candidate; |
| 795 |
} |
| 796 |
} |
| 797 |
|
| 798 |
return null; |
| 799 |
} |
| 800 |
|
| 801 |
/** |
| 802 |
* Build one clean @font-face rule (correct property order + placement). |
| 803 |
* |
| 804 |
* @param array<string,mixed> $v Variant. |
| 805 |
* @param string $local_url Local font URL. |
| 806 |
* @param string $display font-display value. |
| 807 |
* @return string |
| 808 |
*/ |
| 809 |
private function build_face_rule( array $v, string $local_url, string $display ): string { |
| 810 |
$ext = strtolower( (string) pathinfo( (string) wp_parse_url( $local_url, PHP_URL_PATH ), PATHINFO_EXTENSION ) ); |
| 811 |
$format = 'woff' === $ext ? 'woff' : ( 'ttf' === $ext ? 'truetype' : ( 'otf' === $ext ? 'opentype' : 'woff2' ) ); |
| 812 |
|
| 813 |
$lines = array(); |
| 814 |
$lines[] = '@font-face {'; |
| 815 |
$lines[] = " font-family: '" . str_replace( "'", '', $v['family'] ) . "';"; |
| 816 |
$lines[] = ' font-style: ' . $v['style'] . ';'; |
| 817 |
$lines[] = ' font-weight: ' . $v['weight'] . ';'; |
| 818 |
|
| 819 |
if ( '' !== $display && 'auto' !== $display ) { |
| 820 |
$lines[] = ' font-display: ' . $display . ';'; |
| 821 |
} |
| 822 |
|
| 823 |
$lines[] = " src: url('" . esc_url_raw( $local_url ) . "') format('" . $format . "');"; |
| 824 |
|
| 825 |
if ( '' !== $v['unicode_range'] ) { |
| 826 |
$lines[] = ' unicode-range: ' . $v['unicode_range'] . ';'; |
| 827 |
} |
| 828 |
|
| 829 |
$lines[] = "}\n"; |
| 830 |
|
| 831 |
return implode( "\n", $lines ); |
| 832 |
} |
| 833 |
|
| 834 |
/** |
| 835 |
* Deterministic, human-readable font path for a variant, grouped by family. |
| 836 |
* Variable fonts drop the weight. Returns a cache-relative basename (no ext). |
| 837 |
* |
| 838 |
* e.g. fonts/open-sans/open-sans-normal-latin-400 |
| 839 |
* |
| 840 |
* @param array<string,mixed> $v Variant. |
| 841 |
* @return string |
| 842 |
*/ |
| 843 |
private function basename_for( array $v ): string { |
| 844 |
$slug = $this->slug( $v['family'] ); |
| 845 |
$parts = array( $slug, $v['style'], $v['subset'] ); |
| 846 |
|
| 847 |
if ( empty( $v['is_variable'] ) ) { |
| 848 |
$parts[] = $this->slug( $v['weight'] ); |
| 849 |
} |
| 850 |
|
| 851 |
return 'fonts/' . $slug . '/' . implode( '-', array_filter( $parts ) ); |
| 852 |
} |
| 853 |
|
| 854 |
/** |
| 855 |
* Filesystem-safe slug (lowercase alphanumerics + hyphens). |
| 856 |
* |
| 857 |
* @param string $text Text. |
| 858 |
* @return string |
| 859 |
*/ |
| 860 |
private function slug( string $text ): string { |
| 861 |
$text = strtolower( trim( $text ) ); |
| 862 |
$text = preg_replace( '/[^a-z0-9]+/', '-', $text ); |
| 863 |
|
| 864 |
return trim( (string) $text, '-' ); |
| 865 |
} |
| 866 |
|
| 867 |
/* --------------------------------------------------------------------- * |
| 868 |
* Helpers |
| 869 |
* --------------------------------------------------------------------- */ |
| 870 |
|
| 871 |
/** |
| 872 |
* Localise a theme/plugin stylesheet IN PLACE: download provider fonts and |
| 873 |
* rewrite their @font-face src to local URLs, and inline any provider |
| 874 |
* @import (also localised). Everything else is preserved so the sheet keeps |
| 875 |
* its cascade position. Returns the localised CSS, or null if it contained |
| 876 |
* no provider fonts. |
| 877 |
* |
| 878 |
* @param string $css CSS contents. |
| 879 |
* @param string $base_url The file's own URL (for absolutising). |
| 880 |
* @return string|null |
| 881 |
*/ |
| 882 |
private function localize_stylesheet( string $css, string $base_url ): ?string { |
| 883 |
$found = false; |
| 884 |
$effective = $this->effective_subsets(); |
| 885 |
$out = $this->absolutize_urls( $css, $base_url ); |
| 886 |
|
| 887 |
// 1. Provider @import → fetch that CSS, localise its faces, inline it. |
| 888 |
$out = (string) preg_replace_callback( |
| 889 |
'/@import\s+(?:url\(\s*)?[\'"]?([^\'")\s]+)[\'"]?\s*\)?\s*;?/i', |
| 890 |
function ( $m ) use ( &$found, $effective ) { |
| 891 |
$url = Providers::normalize_url( $m[1] ); |
| 892 |
|
| 893 |
if ( ! Providers::is_css_url( $url ) ) { |
| 894 |
return $m[0]; |
| 895 |
} |
| 896 |
|
| 897 |
$imported = $this->downloader->fetch_css( $this->augment_v1_subsets( $url, $effective ) ); |
| 898 |
|
| 899 |
if ( null === $imported ) { |
| 900 |
return ''; // Drop a dead/blocked provider import. |
| 901 |
} |
| 902 |
|
| 903 |
$found = true; |
| 904 |
|
| 905 |
return $this->localize_faces_in_css( $imported, $url ); |
| 906 |
}, |
| 907 |
$out |
| 908 |
); |
| 909 |
|
| 910 |
// 2. Provider @font-face already in the file → localise src in place. |
| 911 |
$out = $this->localize_faces_in_css( $out, $base_url, $found ); |
| 912 |
|
| 913 |
return $found ? $out : null; |
| 914 |
} |
| 915 |
|
| 916 |
/** |
| 917 |
* Rewrite every remote provider @font-face in a CSS string to a locally |
| 918 |
* hosted copy: download the binary, register the variant (honouring the |
| 919 |
* user's enable/disable + subset choices), and replace the block with a |
| 920 |
* clean local @font-face. Non-provider faces are left untouched. |
| 921 |
* |
| 922 |
* @param string $css CSS string. |
| 923 |
* @param string $source Source URL (for provenance + absolutising). |
| 924 |
* @param bool $found Set true if any provider face was localised (by ref). |
| 925 |
* @return string |
| 926 |
*/ |
| 927 |
private function localize_faces_in_css( string $css, string $source, bool &$found = false ): string { |
| 928 |
$blocks = $this->parser->blocks( $css ); |
| 929 |
|
| 930 |
if ( empty( $blocks ) ) { |
| 931 |
return $css; |
| 932 |
} |
| 933 |
|
| 934 |
$variable_map = $this->parser->variable_families( $blocks ); |
| 935 |
$disabled = $this->registry->disabled_keys(); |
| 936 |
$display = (string) Settings::get( 'font_display', 'swap' ); |
| 937 |
$effective = $this->effective_subsets(); |
| 938 |
|
| 939 |
foreach ( $blocks as $block ) { |
| 940 |
if ( ! $this->parser->is_remote_origin( $block['full'] ) ) { |
| 941 |
continue; |
| 942 |
} |
| 943 |
|
| 944 |
$props = $this->parser->properties( $block['body'] ); |
| 945 |
$family = $props['family']; |
| 946 |
$src = $props['src']; |
| 947 |
|
| 948 |
if ( '' === $family || '' === $src ) { |
| 949 |
continue; |
| 950 |
} |
| 951 |
|
| 952 |
$src = Providers::normalize_url( $src, $source ); |
| 953 |
$subset = isset( $block['lead'] ) ? $this->clean_subset( $block['lead'] ) : ''; |
| 954 |
|
| 955 |
if ( '' === $subset ) { |
| 956 |
$subset = FontFaceParser::subset_from_unicode_range( $props['unicode_range'] ); |
| 957 |
} |
| 958 |
|
| 959 |
// Subset filter (baseline-inclusive). Drop an unselected, non-baseline |
| 960 |
// subset face from the sheet entirely. |
| 961 |
if ( '' !== $subset && ! in_array( $subset, $effective, true ) ) { |
| 962 |
$css = $this->str_replace_once( $block['full'], '', $css ); |
| 963 |
continue; |
| 964 |
} |
| 965 |
|
| 966 |
$subset_key = '' !== $subset ? $subset : 'latin'; |
| 967 |
$is_variable = isset( $variable_map[ strtolower( $family ) ] ) |
| 968 |
|| (bool) preg_match( '/\d+\s+\d+/', $props['weight'] ); |
| 969 |
|
| 970 |
$variant = array( |
| 971 |
'family' => $family, |
| 972 |
'weight' => $props['weight'], |
| 973 |
'style' => $props['style'], |
| 974 |
'subset' => $subset_key, |
| 975 |
'unicode_range' => $props['unicode_range'], |
| 976 |
'is_variable' => $is_variable, |
| 977 |
'provider' => Providers::id_for( $src ), |
| 978 |
'source' => $source, |
| 979 |
); |
| 980 |
|
| 981 |
$key = Registry::variant_key( $family, $props['weight'], $props['style'], $subset_key ); |
| 982 |
|
| 983 |
// Disabled variant → register (so it shows in the admin to re-enable) |
| 984 |
// but remove the face so it doesn't load. |
| 985 |
if ( isset( $disabled[ $key ] ) ) { |
| 986 |
$this->register_variant( $variant, '', 0 ); |
| 987 |
$css = $this->str_replace_once( $block['full'], '', $css ); |
| 988 |
$found = true; |
| 989 |
continue; |
| 990 |
} |
| 991 |
|
| 992 |
$basename = $this->basename_for( $variant ); |
| 993 |
$font_file = $this->locate_font( $basename ); |
| 994 |
$size = $font_file ? $this->storage->size( $font_file ) : 0; |
| 995 |
|
| 996 |
if ( null === $font_file ) { |
| 997 |
$dl = $this->downloader->fetch_font( $src, $basename, $this->storage ); |
| 998 |
|
| 999 |
if ( null === $dl ) { |
| 1000 |
continue; // Leave the original src if the download fails. |
| 1001 |
} |
| 1002 |
|
| 1003 |
$font_file = $dl['file']; |
| 1004 |
$size = $dl['size']; |
| 1005 |
} |
| 1006 |
|
| 1007 |
$local_url = add_query_arg( 'ver', Settings::buster(), $this->storage->url( $font_file ) ); |
| 1008 |
|
| 1009 |
$this->register_variant( $variant, $font_file, $size ); |
| 1010 |
|
| 1011 |
$css = $this->str_replace_once( $block['full'], rtrim( $this->build_face_rule( $variant, $local_url, $display ) ), $css ); |
| 1012 |
|
| 1013 |
self::$touched[] = array( |
| 1014 |
'family' => $family, |
| 1015 |
'weight' => $props['weight'], |
| 1016 |
'style' => $props['style'], |
| 1017 |
); |
| 1018 |
|
| 1019 |
$found = true; |
| 1020 |
} |
| 1021 |
|
| 1022 |
return $css; |
| 1023 |
} |
| 1024 |
|
| 1025 |
/** |
| 1026 |
* Register (idempotent upsert) one variant. |
| 1027 |
* |
| 1028 |
* @param array<string,mixed> $v Variant. |
| 1029 |
* @param string $font_file Cache-relative font file ('' if disabled/none). |
| 1030 |
* @param int $size File size in bytes. |
| 1031 |
* @return void |
| 1032 |
*/ |
| 1033 |
private function register_variant( array $v, string $font_file, int $size = 0 ): void { |
| 1034 |
$this->registry->upsert( |
| 1035 |
array( |
| 1036 |
'family' => $v['family'], |
| 1037 |
'weight' => $v['weight'], |
| 1038 |
'style' => $v['style'], |
| 1039 |
'subset' => $v['subset'], |
| 1040 |
'is_variable' => $v['is_variable'], |
| 1041 |
'provider' => $v['provider'], |
| 1042 |
'css_file' => '', |
| 1043 |
'font_file' => $font_file, |
| 1044 |
'file_size' => $size, |
| 1045 |
'source_url' => $v['source'] ?? '', |
| 1046 |
) |
| 1047 |
); |
| 1048 |
} |
| 1049 |
|
| 1050 |
/** |
| 1051 |
* Replace only the first occurrence of a substring. |
| 1052 |
* |
| 1053 |
* @param string $needle Needle. |
| 1054 |
* @param string $replacement Replacement. |
| 1055 |
* @param string $haystack Haystack. |
| 1056 |
* @return string |
| 1057 |
*/ |
| 1058 |
private function str_replace_once( string $needle, string $replacement, string $haystack ): string { |
| 1059 |
$pos = strpos( $haystack, $needle ); |
| 1060 |
|
| 1061 |
if ( false === $pos ) { |
| 1062 |
return $haystack; |
| 1063 |
} |
| 1064 |
|
| 1065 |
return substr_replace( $haystack, $replacement, $pos, strlen( $needle ) ); |
| 1066 |
} |
| 1067 |
|
| 1068 |
/** |
| 1069 |
* Effective subset set: exactly what the user selected. Latin is no longer |
| 1070 |
* force-included — users may deselect it. As a safety net, if the selection |
| 1071 |
* is completely empty we fall back to latin so a site is never left without |
| 1072 |
* any matching faces (which would drop every identifiable-subset font). |
| 1073 |
* |
| 1074 |
* @return string[] |
| 1075 |
*/ |
| 1076 |
private function effective_subsets(): array { |
| 1077 |
$selected = array_values( array_filter( array_map( 'strval', (array) Settings::get( 'subsets', array( 'latin' ) ) ) ) ); |
| 1078 |
|
| 1079 |
if ( empty( $selected ) ) { |
| 1080 |
return array( 'latin' ); |
| 1081 |
} |
| 1082 |
|
| 1083 |
return array_values( array_unique( $selected ) ); |
| 1084 |
} |
| 1085 |
|
| 1086 |
/** |
| 1087 |
* Append/merge a global &subset= param onto a Google CSS v1 request so the |
| 1088 |
* API returns the requested scripts. Non-v1 URLs are returned unchanged. |
| 1089 |
* |
| 1090 |
* @param string $url URL. |
| 1091 |
* @param string[] $subsets Subsets to ensure are requested. |
| 1092 |
* @return string |
| 1093 |
*/ |
| 1094 |
private function augment_v1_subsets( string $url, array $subsets ): string { |
| 1095 |
// Only Google v1 (/css?) honours the global subset param; v2 (/css2) and |
| 1096 |
// other providers control subsets differently. |
| 1097 |
if ( false === strpos( $url, 'fonts.googleapis.com/css' ) || false !== strpos( $url, '/css2' ) ) { |
| 1098 |
return $url; |
| 1099 |
} |
| 1100 |
|
| 1101 |
$existing = array(); |
| 1102 |
|
| 1103 |
if ( preg_match( '/[?&]subset=([^&]+)/i', $url, $m ) ) { |
| 1104 |
$existing = explode( ',', strtolower( $m[1] ) ); |
| 1105 |
} |
| 1106 |
|
| 1107 |
$merged = array_values( array_unique( array_filter( array_merge( $existing, $subsets ) ) ) ); |
| 1108 |
|
| 1109 |
// Strip any existing subset param, then re-append the merged list. |
| 1110 |
$url = (string) preg_replace( '/([?&])subset=[^&]*/i', '$1', $url ); |
| 1111 |
$url = rtrim( $url, '?&' ); |
| 1112 |
$sep = false === strpos( $url, '?' ) ? '?' : '&'; |
| 1113 |
|
| 1114 |
return $url . $sep . 'subset=' . implode( ',', $merged ); |
| 1115 |
} |
| 1116 |
|
| 1117 |
/** |
| 1118 |
* Absolutize relative url() references against a base URL so a cleaned copy |
| 1119 |
* served from /uploads/easyfonts/ still resolves theme assets correctly. |
| 1120 |
* |
| 1121 |
* @param string $css CSS. |
| 1122 |
* @param string $base_url Base URL of the original file. |
| 1123 |
* @return string |
| 1124 |
*/ |
| 1125 |
private function absolutize_urls( string $css, string $base_url ): string { |
| 1126 |
return (string) preg_replace_callback( |
| 1127 |
'/url\(\s*([\'"]?)([^\'")]+)\1\s*\)/i', |
| 1128 |
function ( $m ) use ( $base_url ) { |
| 1129 |
$url = trim( $m[2] ); |
| 1130 |
|
| 1131 |
if ( '' === $url |
| 1132 |
|| 0 === strpos( $url, 'data:' ) |
| 1133 |
|| 0 === strpos( $url, '//' ) |
| 1134 |
|| 0 === strpos( $url, '/' ) |
| 1135 |
|| preg_match( '#^https?://#i', $url ) ) { |
| 1136 |
return $m[0]; |
| 1137 |
} |
| 1138 |
|
| 1139 |
return "url('" . Providers::normalize_url( $url, $base_url ) . "')"; |
| 1140 |
}, |
| 1141 |
$css |
| 1142 |
); |
| 1143 |
} |
| 1144 |
|
| 1145 |
/** |
| 1146 |
* Normalize a subset comment token (e.g. "latin", "[0]" → ''). |
| 1147 |
* |
| 1148 |
* @param string $lead Raw comment text. |
| 1149 |
* @return string |
| 1150 |
*/ |
| 1151 |
private function clean_subset( string $lead ): string { |
| 1152 |
$lead = strtolower( trim( $lead ) ); |
| 1153 |
|
| 1154 |
return preg_match( '/^[a-z]+(?:-[a-z]+)?$/', $lead ) ? $lead : ''; |
| 1155 |
} |
| 1156 |
|
| 1157 |
/** |
| 1158 |
* Does this CSS reference any provider host? (cheap pre-filter) |
| 1159 |
* |
| 1160 |
* @param string $css CSS. |
| 1161 |
* @return bool |
| 1162 |
*/ |
| 1163 |
private function mentions_provider( string $css ): bool { |
| 1164 |
foreach ( Providers::hint_hosts() as $host ) { |
| 1165 |
if ( false !== strpos( $css, $host ) ) { |
| 1166 |
return true; |
| 1167 |
} |
| 1168 |
} |
| 1169 |
|
| 1170 |
return false; |
| 1171 |
} |
| 1172 |
|
| 1173 |
/** |
| 1174 |
* Register a provider CSS URL to fetch. |
| 1175 |
* |
| 1176 |
* @param string $url Normalized URL. |
| 1177 |
* @param string $detector Detector id ('' if from a nested source). |
| 1178 |
*/ |
| 1179 |
private function add_css_url( string $url, string $detector ): void { |
| 1180 |
$this->css_urls[ $url ] = Providers::id_for( $url ); |
| 1181 |
|
| 1182 |
if ( '' !== $detector ) { |
| 1183 |
$this->mark( $detector ); |
| 1184 |
} |
| 1185 |
} |
| 1186 |
|
| 1187 |
/** |
| 1188 |
* Flag a detector as having contributed. |
| 1189 |
* |
| 1190 |
* @param string $detector Detector id. |
| 1191 |
*/ |
| 1192 |
private function mark( string $detector ): void { |
| 1193 |
$this->contributed[ $detector ] = true; |
| 1194 |
} |
| 1195 |
} |
| 1196 |
|
