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<?php |
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/** |
| 3 |
* Consolidator — the aggregate-and-replace engine. |
| 4 |
* |
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* 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: |
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* |
| 9 |
* 1. COLLECT — gather every Google/Bunny font source from <link> tags, |
| 10 |
* inline <style> (@import + remote @font-face), same-origin and |
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* external CSS files, and JS web-font loaders. |
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* 2. AGGREGATE— parse all sources into normalized variants, dedupe, and filter |
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* by subset (inferred from unicode-range, comment-independent). |
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* 3. HOST — download each unique woff2 once, register it, and build ONE |
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* clean local stylesheet (correct font-display placement). |
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* 4. APPLY — strip every original source and inject a single <link>. |
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* |
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* @package EasyFonts |
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*/ |
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|
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namespace EasyFonts\Detect; |
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|
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use EasyFonts\Fonts\Downloader; |
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use EasyFonts\Fonts\Registry; |
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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; |
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|
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/** |
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* Detects, consolidates, and locally hosts web fonts. |
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*/ |
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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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* Set true when an enabled variant the page needs is NOT yet cached and we |
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* couldn't download it on this request (visitor render = downloads disabled, |
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* or warm-budget exhausted). When true, run() leaves the page untouched and |
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* signals a background warm so the cache fills off the render path. |
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* |
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* @var bool |
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*/ |
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private bool $missing = false; |
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|
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/** |
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* Number of local/external stylesheets rewritten in place to cleaned copies |
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* this request (independent of the consolidated provider stylesheet). |
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* |
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* @var int |
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*/ |
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private int $local_rewrites = 0; |
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|
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/** |
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* Font binaries downloaded so far this request (warm-budget counter). |
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* |
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* @var int |
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*/ |
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private int $dl_count = 0; |
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|
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/** |
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* Monotonic start time of the first download this request (warm budget). |
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* |
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* @var float |
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*/ |
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private float $dl_started = 0.0; |
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|
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/** |
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* Lowercased families the beacon has CONFIRMED as loaded-but-never-rendered |
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* on the current route — the only families page scoping drops. A font that |
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* hasn't been measured yet (newly declared, just added/replaced) is NOT in |
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* here, so it always loads until a beacon has judged it. See set_page_scope(). |
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* |
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* @var array<string,bool> |
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*/ |
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private array $scope_out = array(); |
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|
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/** |
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* Whether the current route has been measured by a beacon. When false we |
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* never scope (the scope-out set is empty anyway); kept so the page-scope |
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* feature can be filtered off wholesale. |
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* |
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* @var bool |
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*/ |
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private bool $route_measured = false; |
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|
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/** |
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* Provide the per-route scope-out set before run(). A declared font whose |
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* family is listed here is left out of THIS page's stylesheet (the beacon |
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* measured it loaded but it never rendered here). The font stays registered |
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* and is still hosted for the routes that use it. |
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* |
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* @param array<string,bool> $scope_out Lowercased family => true. |
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* @param bool $measured Route has beacon data. |
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* @return void |
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*/ |
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public function set_page_scope( array $scope_out, bool $measured ): void { |
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$this->scope_out = $scope_out; |
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$this->route_measured = $measured; |
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} |
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|
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/** |
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* True when the most recent run found enabled fonts that aren't cached yet |
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* and downloads were disabled (visitor render) — i.e. a background warm is |
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* needed. Read by the output buffer to spawn a non-blocking loopback. |
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* |
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* @var bool |
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*/ |
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private static bool $needs_warm = false; |
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|
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/** |
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* True when the most recent run actually committed a localization (a |
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* consolidated stylesheet and/or an in-place local stylesheet rewrite). The |
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* output buffer uses this to decide whether to inject head markup / strip |
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* resource hints. |
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* |
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* @var bool |
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*/ |
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private static bool $localized = false; |
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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 |
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* 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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* Does the current page need a background cache-warm? True when an enabled |
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* font isn't cached yet and downloads were disabled for this (visitor) |
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* render. |
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* |
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* @return bool |
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*/ |
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public static function needs_warm(): bool { |
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return self::$needs_warm; |
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} |
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|
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/** |
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* Did the most recent run commit a localization (so the output buffer should |
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* inject preloads/fallbacks and strip provider hints)? |
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* |
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* @return bool |
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*/ |
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public static function localized(): bool { |
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return self::$localized; |
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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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* Transactional + fail-safe: detection/rewriting happens on a working copy. |
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* The rewritten page is only returned ("committed") when EVERY enabled font |
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* it needs is already served locally. If any needed font isn't cached yet and |
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* downloads are disabled for this request (a normal visitor render never |
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* downloads — that's what used to stall and white-screen the site), the |
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* ORIGINAL page is returned unchanged (so the original Google Fonts keep |
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* working — no FOUC, no missing text) and a background warm is flagged. |
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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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*/ |
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public function run( string $html, bool $force = false ): string { |
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unset( $force ); |
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|
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$original = $html; |
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|
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self::$stylesheet_url = ''; |
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self::$stylesheet_file = ''; |
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self::$needs_warm = false; |
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self::$localized = false; |
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$this->missing = false; |
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$this->local_rewrites = 0; |
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|
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// 1. COLLECT (each step may rewrite the working HTML — e.g. strip inline |
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// blocks, or rewrite a theme stylesheet to a cleaned local copy). We |
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// keep the untouched $original to fall back to. |
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$working = $this->collect_from_links( $html ); |
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$working = $this->collect_from_inline( $working ); |
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$working = $this->collect_from_webfont( $working ); |
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$this->collect_async_urls(); |
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|
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// Backstop: nothing in collection may ever blank the document. If a step |
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// somehow emptied a non-empty page, discard the working copy entirely. |
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if ( '' === $working && '' !== $original ) { |
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return $original; |
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} |
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|
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$has_provider = ! empty( $this->css_urls ) || ! empty( $this->raw_blocks ); |
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|
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// Nothing font-related found at all → return the page untouched. |
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if ( ! $has_provider && 0 === $this->local_rewrites ) { |
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return $original; |
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} |
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|
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// 2. AGGREGATE + 3. HOST the consolidated (provider <link> / inline) set. |
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// Downloads only happen here when allowed (admin/CLI/warm); on a |
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// visitor render the missing flag is set instead. |
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$file_url = null; |
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|
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if ( $has_provider ) { |
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$variants = $this->aggregate(); |
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|
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if ( ! empty( $variants ) ) { |
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$file_url = $this->host( $variants ); |
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} |
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} |
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|
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// If ANY enabled font the page needs isn't served locally yet, don't touch |
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// the page — keep the originals working and warm the cache in background. |
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if ( $this->missing ) { |
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return $this->bail( $original ); |
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} |
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|
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// Nothing actually localized (no consolidated sheet built and no local |
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// stylesheet rewritten) → return the page untouched. |
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if ( null === $file_url && 0 === $this->local_rewrites ) { |
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return $this->bail( $original ); |
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} |
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|
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// Everything needed is hosted locally. Physically remove the provider |
| 337 |
// <link> tags we flagged — but only when we built a consolidated |
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// replacement for them (otherwise leave them, so we never drop fonts). |
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if ( null !== $file_url ) { |
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$working = $this->html->remove_stylesheet_links( $working, array_values( array_unique( $this->remove_links ) ) ); |
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self::$stylesheet_url = $file_url; |
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} |
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|
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self::$localized = true; |
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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 $working; |
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} |
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|
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/** |
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* Abort the rewrite: clear any partial output state and return the page |
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* exactly as it came in. If fonts are missing only because downloads were |
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* disabled (visitor render), flag a background warm. |
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* |
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* @param string $original Untouched HTML. |
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* @return string |
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*/ |
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private function bail( string $original ): string { |
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self::$stylesheet_url = ''; |
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self::$stylesheet_file = ''; |
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self::$touched = array(); |
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|
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if ( $this->missing && ! Downloader::fonts_allowed() ) { |
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self::$needs_warm = true; |
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} |
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|
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return $original; |
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} |
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|
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/** |
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* Warm-download budget: bounds how much a single warm (probe) request will |
| 375 |
* fetch, so it can't run long enough to hit max_execution_time. Anything left |
| 376 |
* over is fetched by the next warm. Always true when downloads are disabled |
| 377 |
* (the caller handles that case via the missing flag). |
| 378 |
* |
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* @return bool |
| 380 |
*/ |
| 381 |
private function within_budget(): bool { |
| 382 |
if ( 0.0 === $this->dl_started ) { |
| 383 |
$this->dl_started = microtime( true ); |
| 384 |
} |
| 385 |
|
| 386 |
/** |
| 387 |
* Max font binaries to download in a single warm request. |
| 388 |
* |
| 389 |
* @param int $max |
| 390 |
*/ |
| 391 |
$max_n = (int) apply_filters( 'easyfonts_warm_max_downloads', 25 ); |
| 392 |
|
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/** |
| 394 |
* Max wall-clock seconds to spend downloading in a single warm request. |
| 395 |
* |
| 396 |
* @param float $max |
| 397 |
*/ |
| 398 |
$max_s = (float) apply_filters( 'easyfonts_warm_max_seconds', 25.0 ); |
| 399 |
|
| 400 |
if ( $this->dl_count >= $max_n ) { |
| 401 |
return false; |
| 402 |
} |
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|
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return ( microtime( true ) - $this->dl_started ) < $max_s; |
| 405 |
} |
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|
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/* --------------------------------------------------------------------- * |
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* 1. COLLECT |
| 409 |
* --------------------------------------------------------------------- */ |
| 410 |
|
| 411 |
/** |
| 412 |
* Walk <link> tags: flag provider stylesheets for removal, and rewrite |
| 413 |
* same-origin/external CSS files that hide provider fonts to cleaned copies. |
| 414 |
* |
| 415 |
* @param string $html HTML. |
| 416 |
* @return string |
| 417 |
*/ |
| 418 |
private function collect_from_links( string $html ): string { |
| 419 |
$result = $this->html->rewrite_stylesheet_links( |
| 420 |
$html, |
| 421 |
function ( $href ) { |
| 422 |
$url = Providers::normalize_url( $href ); |
| 423 |
|
| 424 |
// Direct provider stylesheet → consolidated pipeline (removed + |
| 425 |
// re-emitted as one clean local sheet). |
| 426 |
if ( Providers::is_css_url( $url ) ) { |
| 427 |
$this->add_css_url( $url, 'link' ); |
| 428 |
$this->remove_links[] = $href; |
| 429 |
return null; |
| 430 |
} |
| 431 |
|
| 432 |
// A real CSS file (theme/plugin) that may hide provider fonts in |
| 433 |
// @import or @font-face rules. |
| 434 |
if ( $this->fetcher->is_skippable( $url ) ) { |
| 435 |
return null; |
| 436 |
} |
| 437 |
|
| 438 |
$is_local = $this->fetcher->is_local( $url ); |
| 439 |
$css = $is_local |
| 440 |
? $this->fetcher->read_local( $url ) |
| 441 |
: $this->fetcher->read_external( $url, $this->downloader ); |
| 442 |
|
| 443 |
if ( null === $css || ! $this->mentions_provider( $css ) ) { |
| 444 |
return null; |
| 445 |
} |
| 446 |
|
| 447 |
$detector = $is_local ? 'local_css' : 'external_css'; |
| 448 |
|
| 449 |
// Localise IN PLACE: download the provider fonts, rewrite their |
| 450 |
// @font-face src to local URLs, inline any provider @import (also |
| 451 |
// localised). The rest of the file is preserved, so the sheet stays |
| 452 |
// in its original cascade position — just self-hosted now. |
| 453 |
$localized = $this->localize_stylesheet( $css, $url ); |
| 454 |
|
| 455 |
if ( null === $localized ) { |
| 456 |
return null; |
| 457 |
} |
| 458 |
|
| 459 |
// Save the localised copy in a clean css/ folder (no doubled-hash |
| 460 |
// folder, which security scanners flag). |
| 461 |
$filename = 'css/ext-' . substr( hash( 'sha256', $url ), 0, 18 ) . '.css'; |
| 462 |
|
| 463 |
if ( ! $this->storage->write( $filename, $localized ) ) { |
| 464 |
return null; |
| 465 |
} |
| 466 |
|
| 467 |
$this->mark( $detector ); |
| 468 |
$this->local_rewrites++; |
| 469 |
|
| 470 |
return add_query_arg( 'ver', Settings::buster(), $this->storage->url( $filename ) ); |
| 471 |
} |
| 472 |
); |
| 473 |
|
| 474 |
return $result['html']; |
| 475 |
} |
| 476 |
|
| 477 |
/** |
| 478 |
* Walk inline <style> blocks: pull provider @import URLs and remote |
| 479 |
* @font-face blocks out, leaving the rest of the CSS (e.g. Font Awesome) |
| 480 |
* untouched. |
| 481 |
* |
| 482 |
* @param string $html HTML. |
| 483 |
* @return string |
| 484 |
*/ |
| 485 |
private function collect_from_inline( string $html ): string { |
| 486 |
$result = $this->html->rewrite_style_blocks( |
| 487 |
$html, |
| 488 |
function ( $css ) { |
| 489 |
$original = $css; |
| 490 |
|
| 491 |
// Provider @import → collect + remove the statement. |
| 492 |
$replaced = preg_replace_callback( |
| 493 |
'/@import\s+(?:url\(\s*)?[\'"]?([^\'")\s]+)[\'"]?\s*\)?\s*;?/i', |
| 494 |
function ( $m ) { |
| 495 |
$url = Providers::normalize_url( $m[1] ); |
| 496 |
|
| 497 |
if ( Providers::is_css_url( $url ) ) { |
| 498 |
$this->add_css_url( $url, 'inline' ); |
| 499 |
return ''; |
| 500 |
} |
| 501 |
|
| 502 |
return $m[0]; |
| 503 |
}, |
| 504 |
$css |
| 505 |
); |
| 506 |
$css = is_string( $replaced ) ? $replaced : $original; |
| 507 |
|
| 508 |
// Remote @font-face → collect raw block + remove it. |
| 509 |
$blocks = $this->parser->blocks( $css ); |
| 510 |
|
| 511 |
foreach ( $blocks as $block ) { |
| 512 |
if ( $this->parser->is_remote_origin( $block['full'] ) ) { |
| 513 |
$this->raw_blocks[] = array( |
| 514 |
'css' => $block['full'], |
| 515 |
'provider' => Providers::id_for( $block['full'] ), |
| 516 |
); |
| 517 |
$css = str_replace( $block['full'], '', $css ); |
| 518 |
$this->mark( 'inline' ); |
| 519 |
} |
| 520 |
} |
| 521 |
|
| 522 |
return $css === $original ? null : $css; |
| 523 |
} |
| 524 |
); |
| 525 |
|
| 526 |
return $result['html']; |
| 527 |
} |
| 528 |
|
| 529 |
/** |
| 530 |
* Detect the JS Web Font Loader, convert its config to a provider CSS URL, |
| 531 |
* and neutralise the loader scripts. |
| 532 |
* |
| 533 |
* @param string $html HTML. |
| 534 |
* @return string |
| 535 |
*/ |
| 536 |
private function collect_from_webfont( string $html ): string { |
| 537 |
if ( false === stripos( $html, 'WebFont' ) && false === stripos( $html, 'webfont.js' ) ) { |
| 538 |
return $html; |
| 539 |
} |
| 540 |
|
| 541 |
// Match the Google config object in either authoring style: |
| 542 |
// WebFontConfig['google'] = { families: [...] } (bracket assignment) |
| 543 |
// ... google: { families: [...] } ... (object literal) |
| 544 |
// The object body has no nested braces (families uses [ ]), so [^{}] is safe. |
| 545 |
if ( ! preg_match( |
| 546 |
'/(?:WebFontConfig\s*\[\s*[\'"]google[\'"]\s*\]\s*=\s*|[\'"]?google[\'"]?\s*:\s*)(\{[^{}]*\})/is', |
| 547 |
$html, |
| 548 |
$m |
| 549 |
) ) { |
| 550 |
return $html; |
| 551 |
} |
| 552 |
|
| 553 |
// HTML-decode the captured object (&subset=latin → &subset=latin) |
| 554 |
// BEFORE parsing, or the entity breaks family/subset extraction. |
| 555 |
$block = html_entity_decode( $m[1], ENT_QUOTES | ENT_HTML5 ); |
| 556 |
|
| 557 |
if ( ! preg_match( '/families\s*:\s*\[(.*?)\]/is', $block, $fm ) ) { |
| 558 |
return $html; |
| 559 |
} |
| 560 |
|
| 561 |
$families = array(); |
| 562 |
$subsets = array(); |
| 563 |
|
| 564 |
if ( preg_match_all( '/[\'"]([^\'"]+)[\'"]/', $fm[1], $items ) ) { |
| 565 |
foreach ( $items[1] as $item ) { |
| 566 |
$parsed = $this->webfont_family_to_spec( $item ); |
| 567 |
|
| 568 |
if ( ! empty( $parsed['family'] ) ) { |
| 569 |
$families[] = $parsed; |
| 570 |
|
| 571 |
if ( '' !== $parsed['subset'] ) { |
| 572 |
$subsets = array_merge( $subsets, explode( ',', $parsed['subset'] ) ); |
| 573 |
} |
| 574 |
} |
| 575 |
} |
| 576 |
} |
| 577 |
|
| 578 |
if ( empty( $families ) ) { |
| 579 |
return $html; |
| 580 |
} |
| 581 |
|
| 582 |
// Build a modern Google CSS2 request. CSS2 is the endpoint the rest of the |
| 583 |
// pipeline is proven against (subset comments + unicode-ranges parse |
| 584 |
// cleanly), unlike the legacy v1 /css endpoint. Each family becomes a |
| 585 |
// `family=Name:ital,wght@…` parameter. Subsets from the config travel as a |
| 586 |
// global &subset= param; aggregate() merges in user-selected subsets too. |
| 587 |
$url = $this->build_css2_url( $families ); |
| 588 |
|
| 589 |
if ( '' === $url ) { |
| 590 |
return $html; |
| 591 |
} |
| 592 |
|
| 593 |
$subsets = array_values( array_unique( array_filter( $subsets ) ) ); |
| 594 |
|
| 595 |
if ( ! empty( $subsets ) ) { |
| 596 |
$url .= '&subset=' . implode( ',', $subsets ); |
| 597 |
} |
| 598 |
|
| 599 |
$this->add_css_url( $url, 'webfont' ); |
| 600 |
$this->mark( 'webfont' ); |
| 601 |
|
| 602 |
// Remove webfont.js loader scripts + the WebFontConfig block. The src |
| 603 |
// pattern uses bounded character classes (safe); null-guard it anyway so a |
| 604 |
// PCRE failure can never blank the page. The WebFontConfig block is removed |
| 605 |
// by a linear scan instead of a tempered-dot regex — that regex hit the |
| 606 |
// PCRE2 JIT stack limit on ordinary inline scripts and blanked the page. |
| 607 |
$stripped = preg_replace( '#<script\b[^>]*\bsrc=[\'"][^\'"]*webfont(?:\.min)?\.js[\'"][^>]*>\s*</script>#i', '', $html ); |
| 608 |
$html = is_string( $stripped ) ? $stripped : $html; |
| 609 |
$html = $this->remove_script_block_containing( $html, 'WebFontConfig' ); |
| 610 |
|
| 611 |
return $html; |
| 612 |
} |
| 613 |
|
| 614 |
/** |
| 615 |
* Remove any <script>…</script> block whose contents contain $needle, using a |
| 616 |
* linear strpos scan (no regex → no catastrophic backtracking / JIT crash). |
| 617 |
* |
| 618 |
* @param string $html HTML. |
| 619 |
* @param string $needle Marker that must appear inside the script. |
| 620 |
* @return string |
| 621 |
*/ |
| 622 |
private function remove_script_block_containing( string $html, string $needle ): string { |
| 623 |
$offset = 0; |
| 624 |
|
| 625 |
while ( true ) { |
| 626 |
$pos = stripos( $html, $needle, $offset ); |
| 627 |
|
| 628 |
if ( false === $pos ) { |
| 629 |
break; |
| 630 |
} |
| 631 |
|
| 632 |
$start = strripos( substr( $html, 0, $pos ), '<script' ); |
| 633 |
$gt = false === $start ? false : strpos( $html, '>', $start ); |
| 634 |
$end = stripos( $html, '</script>', $pos ); |
| 635 |
|
| 636 |
// Marker isn't inside a clean <script>…</script> wrapper → skip past it. |
| 637 |
if ( false === $start || false === $gt || false === $end || $gt > $pos ) { |
| 638 |
$offset = $pos + strlen( $needle ); |
| 639 |
continue; |
| 640 |
} |
| 641 |
|
| 642 |
$html = substr( $html, 0, $start ) . substr( $html, $end + 9 ); |
| 643 |
$offset = $start; |
| 644 |
} |
| 645 |
|
| 646 |
return $html; |
| 647 |
} |
| 648 |
|
| 649 |
/** |
| 650 |
* Convert one Web Font Loader families[] entry into a structured spec: |
| 651 |
* { family: 'Open Sans', weights: ['400','700'], italics: ['400'], subset: '' } |
| 652 |
* |
| 653 |
* Handles plain names, weight lists, FVD notation ("n4"/"i7"), a trailing |
| 654 |
* "&subset=" / ":subset" segment, URL-encoded names ("%2C"), and skips font |
| 655 |
* stacks / generic families (e.g. "Tahoma,Geneva, sans-serif"). |
| 656 |
* |
| 657 |
* @param string $entry Raw families[] entry. |
| 658 |
* @return array{family:string,weights:string[],italics:string[],subset:string} |
| 659 |
*/ |
| 660 |
private function webfont_family_to_spec( string $entry ): array { |
| 661 |
$none = array( 'family' => '', 'weights' => array(), 'italics' => array(), 'subset' => '' ); |
| 662 |
$entry = html_entity_decode( trim( $entry ), ENT_QUOTES | ENT_HTML5 ); |
| 663 |
|
| 664 |
if ( '' === $entry ) { |
| 665 |
return $none; |
| 666 |
} |
| 667 |
|
| 668 |
// Pull off a &subset= / &subsets= query suffix and capture it. |
| 669 |
$subset = ''; |
| 670 |
|
| 671 |
if ( preg_match( '/[&?]subsets?=([a-z0-9,\-]+)/i', $entry, $sm ) ) { |
| 672 |
$subset = strtolower( $sm[1] ); |
| 673 |
} |
| 674 |
|
| 675 |
$entry = (string) preg_replace( '/[&?].*$/', '', $entry ); // drop the query part. |
| 676 |
|
| 677 |
$parts = explode( ':', $entry ); |
| 678 |
$family_raw = rawurldecode( trim( $parts[0] ) ); // %2C → ",". |
| 679 |
|
| 680 |
// Skip font stacks / generic families — not Google fonts. |
| 681 |
if ( false !== strpos( $family_raw, ',' ) ) { |
| 682 |
return $none; |
| 683 |
} |
| 684 |
|
| 685 |
$lc = strtolower( trim( $family_raw ) ); |
| 686 |
|
| 687 |
if ( in_array( $lc, array( 'sans-serif', 'serif', 'monospace', 'cursive', 'fantasy', 'system-ui', '-apple-system', 'blinkmacsystemfont', 'inherit', 'initial' ), true ) ) { |
| 688 |
return $none; |
| 689 |
} |
| 690 |
|
| 691 |
$family = trim( $family_raw ); |
| 692 |
|
| 693 |
if ( '' === $family ) { |
| 694 |
return $none; |
| 695 |
} |
| 696 |
|
| 697 |
// A third colon segment is a subset list in WebFont loader syntax. |
| 698 |
if ( isset( $parts[2] ) && '' !== trim( $parts[2] ) ) { |
| 699 |
$third = strtolower( trim( $parts[2] ) ); |
| 700 |
$subset = '' !== $subset ? $subset . ',' . $third : $third; |
| 701 |
} |
| 702 |
|
| 703 |
// Weights (second segment) → split into upright + italic numeric lists. |
| 704 |
$weights = array(); |
| 705 |
$italics = array(); |
| 706 |
|
| 707 |
if ( isset( $parts[1] ) && '' !== trim( $parts[1] ) ) { |
| 708 |
foreach ( explode( ',', $parts[1] ) as $token ) { |
| 709 |
$token = trim( $token ); |
| 710 |
|
| 711 |
if ( preg_match( '/^([nio])([1-9])$/i', $token, $fvd ) ) { |
| 712 |
$w = $fvd[2] . '00'; |
| 713 |
'i' === strtolower( $fvd[1] ) ? $italics[] = $w : $weights[] = $w; |
| 714 |
} elseif ( preg_match( '/^(\d{3})italic$/i', $token, $wm ) ) { |
| 715 |
$italics[] = $wm[1]; |
| 716 |
} elseif ( preg_match( '/^\d{3}$/', $token ) ) { |
| 717 |
$weights[] = $token; |
| 718 |
} elseif ( 'bold' === strtolower( $token ) ) { |
| 719 |
$weights[] = '700'; |
| 720 |
} elseif ( in_array( strtolower( $token ), array( 'regular', 'normal' ), true ) ) { |
| 721 |
$weights[] = '400'; |
| 722 |
} elseif ( 'italic' === strtolower( $token ) ) { |
| 723 |
$italics[] = '400'; |
| 724 |
} |
| 725 |
} |
| 726 |
} |
| 727 |
|
| 728 |
// Default to a single upright 400 if no weight was specified. |
| 729 |
if ( empty( $weights ) && empty( $italics ) ) { |
| 730 |
$weights[] = '400'; |
| 731 |
} |
| 732 |
|
| 733 |
return array( |
| 734 |
'family' => $family, |
| 735 |
'weights' => array_values( array_unique( $weights ) ), |
| 736 |
'italics' => array_values( array_unique( $italics ) ), |
| 737 |
'subset' => $subset, |
| 738 |
); |
| 739 |
} |
| 740 |
|
| 741 |
/** |
| 742 |
* Build a single Google CSS2 URL from structured family specs. |
| 743 |
* |
| 744 |
* Produces e.g. |
| 745 |
* https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,400;0,700;1,400&family=Roboto:wght@400&display=swap |
| 746 |
* |
| 747 |
* @param array<int,array{family:string,weights:string[],italics:string[],subset:string}> $families Specs. |
| 748 |
* @return string CSS2 URL, or '' if no families. |
| 749 |
*/ |
| 750 |
private function build_css2_url( array $families ): string { |
| 751 |
$params = array(); |
| 752 |
|
| 753 |
foreach ( $families as $spec ) { |
| 754 |
$name = str_replace( ' ', '+', $spec['family'] ); |
| 755 |
|
| 756 |
if ( '' === $name ) { |
| 757 |
continue; |
| 758 |
} |
| 759 |
|
| 760 |
$uprights = $spec['weights']; |
| 761 |
$italics = $spec['italics']; |
| 762 |
|
| 763 |
if ( ! empty( $italics ) ) { |
| 764 |
// Mixed axis: must list every tuple as ital,wght and sort ascending. |
| 765 |
$tuples = array(); |
| 766 |
|
| 767 |
foreach ( $uprights as $w ) { |
| 768 |
$tuples[] = '0,' . $w; |
| 769 |
} |
| 770 |
|
| 771 |
foreach ( $italics as $w ) { |
| 772 |
$tuples[] = '1,' . $w; |
| 773 |
} |
| 774 |
|
| 775 |
sort( $tuples ); // CSS2 requires ascending tuple order. |
| 776 |
$params[] = $name . ':ital,wght@' . implode( ';', $tuples ); |
| 777 |
} else { |
| 778 |
// Upright only. |
| 779 |
$ws = $uprights; |
| 780 |
sort( $ws, SORT_STRING ); |
| 781 |
$params[] = $name . ':wght@' . implode( ';', $ws ); |
| 782 |
} |
| 783 |
} |
| 784 |
|
| 785 |
if ( empty( $params ) ) { |
| 786 |
return ''; |
| 787 |
} |
| 788 |
|
| 789 |
$display = (string) Settings::get( 'font_display', 'swap' ); |
| 790 |
|
| 791 |
return 'https://fonts.googleapis.com/css2?family=' . implode( '&family=', $params ) . '&display=' . $display; |
| 792 |
} |
| 793 |
|
| 794 |
/** |
| 795 |
* Fold in Google/Bunny CSS URLs that were injected by JavaScript at runtime |
| 796 |
* and reported by async-blocker.js (stored via REST /async-fonts). These |
| 797 |
* never appear in the server-rendered HTML, so this is how arbitrary |
| 798 |
* JS-loaded fonts get self-hosted — closing the one detection gap versus a |
| 799 |
* pure output-buffer scanner. |
| 800 |
* |
| 801 |
* @return void |
| 802 |
*/ |
| 803 |
private function collect_async_urls(): void { |
| 804 |
if ( ! Settings::get( 'async_blocker', 0 ) ) { |
| 805 |
return; |
| 806 |
} |
| 807 |
|
| 808 |
$urls = (array) get_option( 'easyfonts_async_urls', array() ); |
| 809 |
|
| 810 |
foreach ( $urls as $url ) { |
| 811 |
$url = Providers::normalize_url( (string) $url ); |
| 812 |
|
| 813 |
if ( Providers::is_css_url( $url ) ) { |
| 814 |
$this->add_css_url( $url, 'async' ); |
| 815 |
} |
| 816 |
} |
| 817 |
} |
| 818 |
|
| 819 |
/** |
| 820 |
* Parse every collected source into normalized, deduped, subset-filtered |
| 821 |
* variants. |
| 822 |
* |
| 823 |
* @return array<string,array<string,mixed>> Keyed by variant_key. |
| 824 |
*/ |
| 825 |
private function aggregate(): array { |
| 826 |
$variants = array(); |
| 827 |
$subsets = $this->effective_subsets(); |
| 828 |
|
| 829 |
// Provider CSS URLs → fetch + parse. Google v1 URLs are augmented so the |
| 830 |
// API actually returns the non-latin subsets the user enabled. |
| 831 |
foreach ( $this->css_urls as $url => $provider ) { |
| 832 |
$css = $this->downloader->fetch_css( $this->augment_v1_subsets( $url, $subsets ) ); |
| 833 |
|
| 834 |
if ( null === $css ) { |
| 835 |
continue; |
| 836 |
} |
| 837 |
|
| 838 |
$this->collect_variants( $css, $provider, $subsets, $variants, $url ); |
| 839 |
} |
| 840 |
|
| 841 |
// Raw inline @font-face snippets → parse directly. |
| 842 |
foreach ( $this->raw_blocks as $block ) { |
| 843 |
$this->collect_variants( $block['css'], $block['provider'], $subsets, $variants, '' ); |
| 844 |
} |
| 845 |
|
| 846 |
return $variants; |
| 847 |
} |
| 848 |
|
| 849 |
/** |
| 850 |
* Parse CSS into variants and merge them into the accumulator. |
| 851 |
* |
| 852 |
* @param string $css CSS. |
| 853 |
* @param string $provider Provider id. |
| 854 |
* @param string[] $subsets Allowed subsets. |
| 855 |
* @param array<string,array<string,mixed>> $variants Accumulator (by ref). |
| 856 |
* @param string $source Source URL (for provenance). |
| 857 |
*/ |
| 858 |
private function collect_variants( string $css, string $provider, array $subsets, array &$variants, string $source ): void { |
| 859 |
$blocks = $this->parser->blocks( $css ); |
| 860 |
$variable_map = $this->parser->variable_families( $blocks ); |
| 861 |
|
| 862 |
foreach ( $blocks as $block ) { |
| 863 |
$props = $this->parser->properties( $block['body'] ); |
| 864 |
$family = $props['family']; |
| 865 |
$src = $props['src']; |
| 866 |
|
| 867 |
if ( '' === $family || '' === $src ) { |
| 868 |
continue; |
| 869 |
} |
| 870 |
|
| 871 |
$src = Providers::normalize_url( $src, $source ); |
| 872 |
|
| 873 |
// Subset: prefer the Google /* comment */, else infer from range. |
| 874 |
$subset = isset( $block['lead'] ) ? $this->clean_subset( $block['lead'] ) : ''; |
| 875 |
|
| 876 |
if ( '' === $subset ) { |
| 877 |
$subset = FontFaceParser::subset_from_unicode_range( $props['unicode_range'] ); |
| 878 |
} |
| 879 |
|
| 880 |
// Filter by the EFFECTIVE subset set (user selection + latin baseline, |
| 881 |
// computed by the caller). latin/latin-ext are always kept, so enabling |
| 882 |
// an extra script (e.g. cyrillic) never drops a latin-only font. Unknown |
| 883 |
// subset ('') is always kept (we can't tell what it is). |
| 884 |
if ( '' !== $subset && ! in_array( $subset, $subsets, true ) ) { |
| 885 |
continue; |
| 886 |
} |
| 887 |
|
| 888 |
$is_variable = isset( $variable_map[ strtolower( $family ) ] ) |
| 889 |
|| (bool) preg_match( '/\d+\s+\d+/', $props['weight'] ); |
| 890 |
|
| 891 |
$subset_key = '' !== $subset ? $subset : 'latin'; |
| 892 |
$key = Registry::variant_key( $family, $props['weight'], $props['style'], $subset_key ); |
| 893 |
|
| 894 |
// First write wins; identical variants from multiple sources collapse. |
| 895 |
if ( isset( $variants[ $key ] ) ) { |
| 896 |
continue; |
| 897 |
} |
| 898 |
|
| 899 |
$variants[ $key ] = array( |
| 900 |
'family' => $family, |
| 901 |
'weight' => $props['weight'], |
| 902 |
'style' => $props['style'], |
| 903 |
'subset' => $subset_key, |
| 904 |
'src' => $src, |
| 905 |
'unicode_range' => $props['unicode_range'], |
| 906 |
'is_variable' => $is_variable, |
| 907 |
'provider' => $provider, |
| 908 |
'source' => $source, |
| 909 |
); |
| 910 |
} |
| 911 |
} |
| 912 |
|
| 913 |
/* --------------------------------------------------------------------- * |
| 914 |
* 3. HOST |
| 915 |
* --------------------------------------------------------------------- */ |
| 916 |
|
| 917 |
/** |
| 918 |
* Register every variant and write one consolidated stylesheet. The file is |
| 919 |
* keyed by the variant set + display + subsets, so pages sharing fonts share |
| 920 |
* the file. |
| 921 |
* |
| 922 |
* Registration runs for EVERY variant on every request (idempotent upsert), |
| 923 |
* even when the consolidated file already exists — so the hosted-fonts list |
| 924 |
* can't drift out of sync with what's actually served. Font binaries are |
| 925 |
* downloaded only when missing. Metric extraction is deliberately NOT done |
| 926 |
* here; it runs off the page-render path (see MetricsBackfill). |
| 927 |
* |
| 928 |
* @param array<string,array<string,mixed>> $variants Variants by key. |
| 929 |
* @return string|null Local stylesheet URL (cache-busted), or null. |
| 930 |
*/ |
| 931 |
private function host( array $variants ): ?string { |
| 932 |
$display = (string) Settings::get( 'font_display', 'swap' ); |
| 933 |
$subsets = implode( ',', (array) Settings::get( 'subsets', array() ) ); |
| 934 |
|
| 935 |
$disabled = $this->registry->disabled_keys(); |
| 936 |
|
| 937 |
// Page scoping: when the route has been measured, drop only the fonts a |
| 938 |
// beacon CONFIRMED are loaded-but-unused here (e.g. a theme enqueues a |
| 939 |
// global Google-fonts set, but a font only renders on one template). |
| 940 |
// Matched at the family level and beacon-confirmed, so a newly declared |
| 941 |
// font is never dropped before it's been judged, and the decision can't |
| 942 |
// oscillate (it's based on the page's authorial font-family, which holds |
| 943 |
// even after the font is scoped out). |
| 944 |
// - family is a confirmed scope-out -> skip on this page |
| 945 |
// - family in the safelist -> always include |
| 946 |
// - everything else (used, or new/unjudged) -> include |
| 947 |
$scope = $this->route_measured |
| 948 |
&& (bool) apply_filters( 'easyfonts_page_scope_fonts', true ); |
| 949 |
|
| 950 |
$force = array(); |
| 951 |
|
| 952 |
foreach ( (array) apply_filters( 'easyfonts_force_families', array() ) as $f ) { |
| 953 |
$force[ strtolower( (string) $f ) ] = true; |
| 954 |
} |
| 955 |
|
| 956 |
// Decide, per detected variant, whether it is EMITTED on this page. |
| 957 |
// Skipped variants are still registered below so they stay visible and |
| 958 |
// re-enableable, and are still hosted by the routes that use them. |
| 959 |
$emit = array(); |
| 960 |
|
| 961 |
foreach ( $variants as $key => $v ) { |
| 962 |
if ( isset( $disabled[ $key ] ) ) { |
| 963 |
continue; |
| 964 |
} |
| 965 |
|
| 966 |
if ( $scope ) { |
| 967 |
$fam = strtolower( (string) $v['family'] ); |
| 968 |
|
| 969 |
if ( isset( $this->scope_out[ $fam ] ) && ! isset( $force[ $fam ] ) ) { |
| 970 |
continue; |
| 971 |
} |
| 972 |
} |
| 973 |
|
| 974 |
$emit[ $key ] = true; |
| 975 |
} |
| 976 |
|
| 977 |
// Cache key = the EMITTED set (+ display + subsets). Two pages that emit |
| 978 |
// the same faces share one file; a page whose enabled set differs gets |
| 979 |
// its own. If the keyed file already exists we never rewrite it — |
| 980 |
// identical sets are deduped on disk, so we don't burn IO/CPU |
| 981 |
// regenerating the same stylesheet. |
| 982 |
$emit_keys = array_keys( $emit ); |
| 983 |
sort( $emit_keys ); |
| 984 |
$hash = substr( hash( 'sha256', implode( '|', $emit_keys ) . '|' . $display . '|' . $subsets ), 0, 20 ); |
| 985 |
|
| 986 |
// Consolidated stylesheet lives in a readable `css/` folder. Font |
| 987 |
// binaries live under `fonts/{family}/…` so identical variants are |
| 988 |
// shared across stylesheets. |
| 989 |
$file = 'css/' . $hash . '.css'; |
| 990 |
$file_exists = $this->storage->exists( $file ); |
| 991 |
|
| 992 |
// M-3: one batched read of the rows we already have for every detected |
| 993 |
// variant, so registration costs a single SELECT instead of one per |
| 994 |
// variant. We then only write rows that are new or whose font file |
| 995 |
// changed — on a warm-cache render that means zero writes. |
| 996 |
$known = $this->registry->existing_map( array_keys( $variants ) ); |
| 997 |
|
| 998 |
$css = "/**\n * Auto Generated by EasyFonts\n * @url: https://fluxpress.io\n */\n"; |
| 999 |
$hosted = 0; |
| 1000 |
|
| 1001 |
foreach ( $variants as $key => $v ) { |
| 1002 |
$is_emitted = isset( $emit[ $key ] ); |
| 1003 |
|
| 1004 |
$basename = $this->basename_for( $v ); |
| 1005 |
$font_file = $this->locate_font( $basename ); |
| 1006 |
$size = $font_file ? $this->storage->size( $font_file ) : 0; |
| 1007 |
|
| 1008 |
// Only EMITTED variants are required to be hosted on this page. A |
| 1009 |
// disabled or unloaded variant is never downloaded and never blocks |
| 1010 |
// the page (it isn't needed here); it may still be downloaded later |
| 1011 |
// by a route that actually renders it (font binaries are shared). |
| 1012 |
if ( $is_emitted && null === $font_file ) { |
| 1013 |
if ( ! Downloader::fonts_allowed() || ! $this->within_budget() ) { |
| 1014 |
$this->missing = true; |
| 1015 |
continue; |
| 1016 |
} |
| 1017 |
|
| 1018 |
$download = $this->downloader->fetch_font( $v['src'], $basename, $this->storage ); |
| 1019 |
|
| 1020 |
if ( null === $download ) { |
| 1021 |
// Genuine fetch failure — treat as missing so we don't strip |
| 1022 |
// the original source and leave the page without this font. |
| 1023 |
$this->missing = true; |
| 1024 |
continue; |
| 1025 |
} |
| 1026 |
|
| 1027 |
$this->dl_count++; |
| 1028 |
$font_file = $download['file']; |
| 1029 |
$size = $download['size']; |
| 1030 |
} |
| 1031 |
|
| 1032 |
// Register the variant, but skip the write when we already have it |
| 1033 |
// with the same font file (the common warm-cache case) — keeps the |
| 1034 |
// hosted-fonts list in sync without N queries on the hot path. |
| 1035 |
$current = $known[ $key ] ?? null; |
| 1036 |
|
| 1037 |
if ( null === $current || (string) $current !== (string) $font_file ) { |
| 1038 |
$this->registry->upsert( |
| 1039 |
array( |
| 1040 |
'family' => $v['family'], |
| 1041 |
'weight' => $v['weight'], |
| 1042 |
'style' => $v['style'], |
| 1043 |
'subset' => $v['subset'], |
| 1044 |
'is_variable' => $v['is_variable'], |
| 1045 |
'provider' => $v['provider'], |
| 1046 |
'css_file' => $file, |
| 1047 |
'font_file' => (string) $font_file, |
| 1048 |
'file_size' => $size, |
| 1049 |
'source_url' => $v['source'], |
| 1050 |
) |
| 1051 |
); |
| 1052 |
} |
| 1053 |
|
| 1054 |
if ( ! $is_emitted || null === $font_file ) { |
| 1055 |
continue; |
| 1056 |
} |
| 1057 |
|
| 1058 |
$local_url = add_query_arg( 'ver', Settings::buster(), $this->storage->url( $font_file ) ); |
| 1059 |
$css .= $this->build_face_rule( $v, $local_url, $display ); |
| 1060 |
|
| 1061 |
self::$touched[] = array( |
| 1062 |
'family' => $v['family'], |
| 1063 |
'weight' => $v['weight'], |
| 1064 |
'style' => $v['style'], |
| 1065 |
); |
| 1066 |
|
| 1067 |
$hosted++; |
| 1068 |
} |
| 1069 |
|
| 1070 |
if ( 0 === $hosted ) { |
| 1071 |
return null; |
| 1072 |
} |
| 1073 |
|
| 1074 |
// Deterministic content for a given emit set: only write when the keyed |
| 1075 |
// file doesn't already exist. |
| 1076 |
if ( ! $file_exists ) { |
| 1077 |
if ( ! $this->storage->write( $file, $css ) ) { |
| 1078 |
return null; |
| 1079 |
} |
| 1080 |
} |
| 1081 |
|
| 1082 |
self::$stylesheet_file = $file; |
| 1083 |
|
| 1084 |
return add_query_arg( 'ver', Settings::buster(), $this->storage->url( $file ) ); |
| 1085 |
} |
| 1086 |
|
| 1087 |
/** |
| 1088 |
* Find an already-downloaded font file for a basename (any known extension). |
| 1089 |
* |
| 1090 |
* @param string $basename Cache-relative basename (no extension). |
| 1091 |
* @return string|null Cache-relative filename, or null if none. |
| 1092 |
*/ |
| 1093 |
private function locate_font( string $basename ): ?string { |
| 1094 |
foreach ( array( 'woff2', 'woff', 'ttf', 'otf' ) as $ext ) { |
| 1095 |
$candidate = $basename . '.' . $ext; |
| 1096 |
|
| 1097 |
if ( $this->storage->exists( $candidate ) ) { |
| 1098 |
return $candidate; |
| 1099 |
} |
| 1100 |
} |
| 1101 |
|
| 1102 |
return null; |
| 1103 |
} |
| 1104 |
|
| 1105 |
/** |
| 1106 |
* Build one clean @font-face rule (correct property order + placement). |
| 1107 |
* |
| 1108 |
* @param array<string,mixed> $v Variant. |
| 1109 |
* @param string $local_url Local font URL. |
| 1110 |
* @param string $display font-display value. |
| 1111 |
* @return string |
| 1112 |
*/ |
| 1113 |
private function build_face_rule( array $v, string $local_url, string $display ): string { |
| 1114 |
$ext = strtolower( (string) pathinfo( (string) wp_parse_url( $local_url, PHP_URL_PATH ), PATHINFO_EXTENSION ) ); |
| 1115 |
$format = 'woff' === $ext ? 'woff' : ( 'ttf' === $ext ? 'truetype' : ( 'otf' === $ext ? 'opentype' : 'woff2' ) ); |
| 1116 |
|
| 1117 |
// Harden every interpolated value against CSS-context breakout. Family / |
| 1118 |
// weight / style / unicode-range originate from parsed @font-face bodies |
| 1119 |
// and font URLs, which an author could craft; stripping CSS structural |
| 1120 |
// characters stops a malicious value from escaping its declaration (and, |
| 1121 |
// when the sheet is inlined, from breaking out of <style>). Legitimate |
| 1122 |
// values — "Open Sans", "100 900", "oblique 10deg", "U+0000-00FF" — are |
| 1123 |
// unaffected, so nothing is lost. |
| 1124 |
$family = self::css_token( (string) $v['family'] ); |
| 1125 |
$style = self::css_token( (string) $v['style'] ); |
| 1126 |
$weight = self::css_token( (string) $v['weight'] ); |
| 1127 |
$urange = self::css_token( (string) $v['unicode_range'] ); |
| 1128 |
|
| 1129 |
$lines = array(); |
| 1130 |
$lines[] = '@font-face {'; |
| 1131 |
$lines[] = " font-family: '" . $family . "';"; |
| 1132 |
$lines[] = ' font-style: ' . ( '' !== $style ? $style : 'normal' ) . ';'; |
| 1133 |
$lines[] = ' font-weight: ' . ( '' !== $weight ? $weight : '400' ) . ';'; |
| 1134 |
|
| 1135 |
if ( '' !== $display && 'auto' !== $display ) { |
| 1136 |
$lines[] = ' font-display: ' . self::css_token( $display ) . ';'; |
| 1137 |
} |
| 1138 |
|
| 1139 |
$lines[] = " src: url('" . esc_url_raw( $local_url ) . "') format('" . $format . "');"; |
| 1140 |
|
| 1141 |
if ( '' !== $urange ) { |
| 1142 |
$lines[] = ' unicode-range: ' . $urange . ';'; |
| 1143 |
} |
| 1144 |
|
| 1145 |
$lines[] = "}\n"; |
| 1146 |
|
| 1147 |
return implode( "\n", $lines ); |
| 1148 |
} |
| 1149 |
|
| 1150 |
/** |
| 1151 |
* Strip characters that could break out of a CSS string or declaration (or, |
| 1152 |
* for an inlined sheet, out of the <style> element). Removes quotes, braces, |
| 1153 |
* semicolons, angle brackets, backslashes, comment delimiters and newlines. |
| 1154 |
* Real font-family / weight / style / unicode-range values never contain |
| 1155 |
* these, so this is purely defensive and lossless for legitimate input. |
| 1156 |
* |
| 1157 |
* @param string $value Raw value. |
| 1158 |
* @return string |
| 1159 |
*/ |
| 1160 |
private static function css_token( string $value ): string { |
| 1161 |
return trim( |
| 1162 |
str_replace( |
| 1163 |
array( "'", '"', ';', '{', '}', '<', '>', '\\', '/*', '*/', "\r", "\n", "\t" ), |
| 1164 |
'', |
| 1165 |
$value |
| 1166 |
) |
| 1167 |
); |
| 1168 |
} |
| 1169 |
|
| 1170 |
/** |
| 1171 |
* Deterministic, human-readable font path for a variant, grouped by family. |
| 1172 |
* Variable fonts drop the weight. Returns a cache-relative basename (no ext). |
| 1173 |
* |
| 1174 |
* e.g. fonts/open-sans/open-sans-normal-latin-400 |
| 1175 |
* |
| 1176 |
* @param array<string,mixed> $v Variant. |
| 1177 |
* @return string |
| 1178 |
*/ |
| 1179 |
private function basename_for( array $v ): string { |
| 1180 |
$slug = $this->slug( $v['family'] ); |
| 1181 |
$parts = array( $slug, $v['style'], $v['subset'] ); |
| 1182 |
|
| 1183 |
if ( empty( $v['is_variable'] ) ) { |
| 1184 |
$parts[] = $this->slug( $v['weight'] ); |
| 1185 |
} |
| 1186 |
|
| 1187 |
return 'fonts/' . $slug . '/' . implode( '-', array_filter( $parts ) ); |
| 1188 |
} |
| 1189 |
|
| 1190 |
/** |
| 1191 |
* Filesystem-safe slug (lowercase alphanumerics + hyphens). |
| 1192 |
* |
| 1193 |
* @param string $text Text. |
| 1194 |
* @return string |
| 1195 |
*/ |
| 1196 |
private function slug( string $text ): string { |
| 1197 |
$text = strtolower( trim( $text ) ); |
| 1198 |
$text = preg_replace( '/[^a-z0-9]+/', '-', $text ); |
| 1199 |
|
| 1200 |
return trim( (string) $text, '-' ); |
| 1201 |
} |
| 1202 |
|
| 1203 |
/* --------------------------------------------------------------------- * |
| 1204 |
* Helpers |
| 1205 |
* --------------------------------------------------------------------- */ |
| 1206 |
|
| 1207 |
/** |
| 1208 |
* Localise a theme/plugin stylesheet IN PLACE: download provider fonts and |
| 1209 |
* rewrite their @font-face src to local URLs, and inline any provider |
| 1210 |
* @import (also localised). Everything else is preserved so the sheet keeps |
| 1211 |
* its cascade position. Returns the localised CSS, or null if it contained |
| 1212 |
* no provider fonts. |
| 1213 |
* |
| 1214 |
* @param string $css CSS contents. |
| 1215 |
* @param string $base_url The file's own URL (for absolutising). |
| 1216 |
* @return string|null |
| 1217 |
*/ |
| 1218 |
private function localize_stylesheet( string $css, string $base_url ): ?string { |
| 1219 |
$found = false; |
| 1220 |
$effective = $this->effective_subsets(); |
| 1221 |
$out = $this->absolutize_urls( $css, $base_url ); |
| 1222 |
|
| 1223 |
// 1. Provider @import → fetch that CSS, localise its faces, inline it. |
| 1224 |
$imported_out = preg_replace_callback( |
| 1225 |
'/@import\s+(?:url\(\s*)?[\'"]?([^\'")\s]+)[\'"]?\s*\)?\s*;?/i', |
| 1226 |
function ( $m ) use ( &$found, $effective ) { |
| 1227 |
$url = Providers::normalize_url( $m[1] ); |
| 1228 |
|
| 1229 |
if ( ! Providers::is_css_url( $url ) ) { |
| 1230 |
return $m[0]; |
| 1231 |
} |
| 1232 |
|
| 1233 |
$imported = $this->downloader->fetch_css( $this->augment_v1_subsets( $url, $effective ) ); |
| 1234 |
|
| 1235 |
if ( null === $imported ) { |
| 1236 |
return ''; // Drop a dead/blocked provider import. |
| 1237 |
} |
| 1238 |
|
| 1239 |
$found = true; |
| 1240 |
|
| 1241 |
return $this->localize_faces_in_css( $imported, $url ); |
| 1242 |
}, |
| 1243 |
$out |
| 1244 |
); |
| 1245 |
$out = is_string( $imported_out ) ? $imported_out : $out; |
| 1246 |
|
| 1247 |
// 2. Provider @font-face already in the file → localise src in place. |
| 1248 |
$out = $this->localize_faces_in_css( $out, $base_url, $found ); |
| 1249 |
|
| 1250 |
return $found ? $out : null; |
| 1251 |
} |
| 1252 |
|
| 1253 |
/** |
| 1254 |
* Rewrite every remote provider @font-face in a CSS string to a locally |
| 1255 |
* hosted copy: download the binary, register the variant (honouring the |
| 1256 |
* user's enable/disable + subset choices), and replace the block with a |
| 1257 |
* clean local @font-face. Non-provider faces are left untouched. |
| 1258 |
* |
| 1259 |
* @param string $css CSS string. |
| 1260 |
* @param string $source Source URL (for provenance + absolutising). |
| 1261 |
* @param bool $found Set true if any provider face was localised (by ref). |
| 1262 |
* @return string |
| 1263 |
*/ |
| 1264 |
private function localize_faces_in_css( string $css, string $source, bool &$found = false ): string { |
| 1265 |
$blocks = $this->parser->blocks( $css ); |
| 1266 |
|
| 1267 |
if ( empty( $blocks ) ) { |
| 1268 |
return $css; |
| 1269 |
} |
| 1270 |
|
| 1271 |
$variable_map = $this->parser->variable_families( $blocks ); |
| 1272 |
$disabled = $this->registry->disabled_keys(); |
| 1273 |
$display = (string) Settings::get( 'font_display', 'swap' ); |
| 1274 |
$effective = $this->effective_subsets(); |
| 1275 |
|
| 1276 |
foreach ( $blocks as $block ) { |
| 1277 |
if ( ! $this->parser->is_remote_origin( $block['full'] ) ) { |
| 1278 |
continue; |
| 1279 |
} |
| 1280 |
|
| 1281 |
$props = $this->parser->properties( $block['body'] ); |
| 1282 |
$family = $props['family']; |
| 1283 |
$src = $props['src']; |
| 1284 |
|
| 1285 |
if ( '' === $family || '' === $src ) { |
| 1286 |
continue; |
| 1287 |
} |
| 1288 |
|
| 1289 |
$src = Providers::normalize_url( $src, $source ); |
| 1290 |
$subset = isset( $block['lead'] ) ? $this->clean_subset( $block['lead'] ) : ''; |
| 1291 |
|
| 1292 |
if ( '' === $subset ) { |
| 1293 |
$subset = FontFaceParser::subset_from_unicode_range( $props['unicode_range'] ); |
| 1294 |
} |
| 1295 |
|
| 1296 |
// Subset filter (baseline-inclusive). Drop an unselected, non-baseline |
| 1297 |
// subset face from the sheet entirely. |
| 1298 |
if ( '' !== $subset && ! in_array( $subset, $effective, true ) ) { |
| 1299 |
$css = $this->str_replace_once( $block['full'], '', $css ); |
| 1300 |
continue; |
| 1301 |
} |
| 1302 |
|
| 1303 |
$subset_key = '' !== $subset ? $subset : 'latin'; |
| 1304 |
$is_variable = isset( $variable_map[ strtolower( $family ) ] ) |
| 1305 |
|| (bool) preg_match( '/\d+\s+\d+/', $props['weight'] ); |
| 1306 |
|
| 1307 |
$variant = array( |
| 1308 |
'family' => $family, |
| 1309 |
'weight' => $props['weight'], |
| 1310 |
'style' => $props['style'], |
| 1311 |
'subset' => $subset_key, |
| 1312 |
'unicode_range' => $props['unicode_range'], |
| 1313 |
'is_variable' => $is_variable, |
| 1314 |
'provider' => Providers::id_for( $src ), |
| 1315 |
'source' => $source, |
| 1316 |
); |
| 1317 |
|
| 1318 |
$key = Registry::variant_key( $family, $props['weight'], $props['style'], $subset_key ); |
| 1319 |
|
| 1320 |
// Disabled variant → register (so it shows in the admin to re-enable) |
| 1321 |
// but remove the face so it doesn't load. |
| 1322 |
if ( isset( $disabled[ $key ] ) ) { |
| 1323 |
$this->register_variant( $variant, '', 0 ); |
| 1324 |
$css = $this->str_replace_once( $block['full'], '', $css ); |
| 1325 |
$found = true; |
| 1326 |
continue; |
| 1327 |
} |
| 1328 |
|
| 1329 |
$basename = $this->basename_for( $variant ); |
| 1330 |
$font_file = $this->locate_font( $basename ); |
| 1331 |
$size = $font_file ? $this->storage->size( $font_file ) : 0; |
| 1332 |
|
| 1333 |
if ( null === $font_file ) { |
| 1334 |
// As in host(): never download on a visitor render, and honour the |
| 1335 |
// warm budget. Mark missing and leave the original @font-face src |
| 1336 |
// in place so the font keeps loading from the provider until warm. |
| 1337 |
if ( ! Downloader::fonts_allowed() || ! $this->within_budget() ) { |
| 1338 |
$this->missing = true; |
| 1339 |
continue; |
| 1340 |
} |
| 1341 |
|
| 1342 |
$dl = $this->downloader->fetch_font( $src, $basename, $this->storage ); |
| 1343 |
|
| 1344 |
if ( null === $dl ) { |
| 1345 |
$this->missing = true; |
| 1346 |
continue; // Leave the original src if the download fails. |
| 1347 |
} |
| 1348 |
|
| 1349 |
$this->dl_count++; |
| 1350 |
$font_file = $dl['file']; |
| 1351 |
$size = $dl['size']; |
| 1352 |
} |
| 1353 |
|
| 1354 |
$local_url = add_query_arg( 'ver', Settings::buster(), $this->storage->url( $font_file ) ); |
| 1355 |
|
| 1356 |
$this->register_variant( $variant, $font_file, $size ); |
| 1357 |
|
| 1358 |
$css = $this->str_replace_once( $block['full'], rtrim( $this->build_face_rule( $variant, $local_url, $display ) ), $css ); |
| 1359 |
|
| 1360 |
self::$touched[] = array( |
| 1361 |
'family' => $family, |
| 1362 |
'weight' => $props['weight'], |
| 1363 |
'style' => $props['style'], |
| 1364 |
); |
| 1365 |
|
| 1366 |
$found = true; |
| 1367 |
} |
| 1368 |
|
| 1369 |
return $css; |
| 1370 |
} |
| 1371 |
|
| 1372 |
/** |
| 1373 |
* Register (idempotent upsert) one variant. |
| 1374 |
* |
| 1375 |
* @param array<string,mixed> $v Variant. |
| 1376 |
* @param string $font_file Cache-relative font file ('' if disabled/none). |
| 1377 |
* @param int $size File size in bytes. |
| 1378 |
* @return void |
| 1379 |
*/ |
| 1380 |
private function register_variant( array $v, string $font_file, int $size = 0 ): void { |
| 1381 |
$this->registry->upsert( |
| 1382 |
array( |
| 1383 |
'family' => $v['family'], |
| 1384 |
'weight' => $v['weight'], |
| 1385 |
'style' => $v['style'], |
| 1386 |
'subset' => $v['subset'], |
| 1387 |
'is_variable' => $v['is_variable'], |
| 1388 |
'provider' => $v['provider'], |
| 1389 |
'css_file' => '', |
| 1390 |
'font_file' => $font_file, |
| 1391 |
'file_size' => $size, |
| 1392 |
'source_url' => $v['source'] ?? '', |
| 1393 |
) |
| 1394 |
); |
| 1395 |
} |
| 1396 |
|
| 1397 |
/** |
| 1398 |
* Replace only the first occurrence of a substring. |
| 1399 |
* |
| 1400 |
* @param string $needle Needle. |
| 1401 |
* @param string $replacement Replacement. |
| 1402 |
* @param string $haystack Haystack. |
| 1403 |
* @return string |
| 1404 |
*/ |
| 1405 |
private function str_replace_once( string $needle, string $replacement, string $haystack ): string { |
| 1406 |
$pos = strpos( $haystack, $needle ); |
| 1407 |
|
| 1408 |
if ( false === $pos ) { |
| 1409 |
return $haystack; |
| 1410 |
} |
| 1411 |
|
| 1412 |
return substr_replace( $haystack, $replacement, $pos, strlen( $needle ) ); |
| 1413 |
} |
| 1414 |
|
| 1415 |
/** |
| 1416 |
* Effective subset set: exactly what the user selected. Latin is no longer |
| 1417 |
* force-included — users may deselect it. As a safety net, if the selection |
| 1418 |
* is completely empty we fall back to latin so a site is never left without |
| 1419 |
* any matching faces (which would drop every identifiable-subset font). |
| 1420 |
* |
| 1421 |
* @return string[] |
| 1422 |
*/ |
| 1423 |
private function effective_subsets(): array { |
| 1424 |
$selected = array_values( array_filter( array_map( 'strval', (array) Settings::get( 'subsets', array( 'latin' ) ) ) ) ); |
| 1425 |
|
| 1426 |
if ( empty( $selected ) ) { |
| 1427 |
return array( 'latin' ); |
| 1428 |
} |
| 1429 |
|
| 1430 |
return array_values( array_unique( $selected ) ); |
| 1431 |
} |
| 1432 |
|
| 1433 |
/** |
| 1434 |
* Append/merge a global &subset= param onto a Google CSS v1 request so the |
| 1435 |
* API returns the requested scripts. Non-v1 URLs are returned unchanged. |
| 1436 |
* |
| 1437 |
* @param string $url URL. |
| 1438 |
* @param string[] $subsets Subsets to ensure are requested. |
| 1439 |
* @return string |
| 1440 |
*/ |
| 1441 |
private function augment_v1_subsets( string $url, array $subsets ): string { |
| 1442 |
// Only Google v1 (/css?) honours the global subset param; v2 (/css2) and |
| 1443 |
// other providers control subsets differently. |
| 1444 |
if ( false === strpos( $url, 'fonts.googleapis.com/css' ) || false !== strpos( $url, '/css2' ) ) { |
| 1445 |
return $url; |
| 1446 |
} |
| 1447 |
|
| 1448 |
$existing = array(); |
| 1449 |
|
| 1450 |
if ( preg_match( '/[?&]subset=([^&]+)/i', $url, $m ) ) { |
| 1451 |
$existing = explode( ',', strtolower( $m[1] ) ); |
| 1452 |
} |
| 1453 |
|
| 1454 |
$merged = array_values( array_unique( array_filter( array_merge( $existing, $subsets ) ) ) ); |
| 1455 |
|
| 1456 |
// Strip any existing subset param, then re-append the merged list. |
| 1457 |
$url = (string) preg_replace( '/([?&])subset=[^&]*/i', '$1', $url ); |
| 1458 |
$url = rtrim( $url, '?&' ); |
| 1459 |
$sep = false === strpos( $url, '?' ) ? '?' : '&'; |
| 1460 |
|
| 1461 |
return $url . $sep . 'subset=' . implode( ',', $merged ); |
| 1462 |
} |
| 1463 |
|
| 1464 |
/** |
| 1465 |
* Absolutize relative url() references against a base URL so a cleaned copy |
| 1466 |
* served from /uploads/easyfonts/ still resolves theme assets correctly. |
| 1467 |
* |
| 1468 |
* @param string $css CSS. |
| 1469 |
* @param string $base_url Base URL of the original file. |
| 1470 |
* @return string |
| 1471 |
*/ |
| 1472 |
private function absolutize_urls( string $css, string $base_url ): string { |
| 1473 |
$out = preg_replace_callback( |
| 1474 |
'/url\(\s*([\'"]?)([^\'")]+)\1\s*\)/i', |
| 1475 |
function ( $m ) use ( $base_url ) { |
| 1476 |
$url = trim( $m[2] ); |
| 1477 |
|
| 1478 |
if ( '' === $url |
| 1479 |
|| 0 === strpos( $url, 'data:' ) |
| 1480 |
|| 0 === strpos( $url, '//' ) |
| 1481 |
|| 0 === strpos( $url, '/' ) |
| 1482 |
|| preg_match( '#^https?://#i', $url ) ) { |
| 1483 |
return $m[0]; |
| 1484 |
} |
| 1485 |
|
| 1486 |
return "url('" . Providers::normalize_url( $url, $base_url ) . "')"; |
| 1487 |
}, |
| 1488 |
$css |
| 1489 |
); |
| 1490 |
|
| 1491 |
return is_string( $out ) ? $out : $css; |
| 1492 |
} |
| 1493 |
|
| 1494 |
/** |
| 1495 |
* Normalize a subset comment token (e.g. "latin", "[0]" → ''). |
| 1496 |
* |
| 1497 |
* @param string $lead Raw comment text. |
| 1498 |
* @return string |
| 1499 |
*/ |
| 1500 |
private function clean_subset( string $lead ): string { |
| 1501 |
$lead = strtolower( trim( $lead ) ); |
| 1502 |
|
| 1503 |
return preg_match( '/^[a-z]+(?:-[a-z]+)?$/', $lead ) ? $lead : ''; |
| 1504 |
} |
| 1505 |
|
| 1506 |
/** |
| 1507 |
* Does this CSS reference any provider host? (cheap pre-filter) |
| 1508 |
* |
| 1509 |
* @param string $css CSS. |
| 1510 |
* @return bool |
| 1511 |
*/ |
| 1512 |
private function mentions_provider( string $css ): bool { |
| 1513 |
foreach ( Providers::hint_hosts() as $host ) { |
| 1514 |
if ( false !== strpos( $css, $host ) ) { |
| 1515 |
return true; |
| 1516 |
} |
| 1517 |
} |
| 1518 |
|
| 1519 |
return false; |
| 1520 |
} |
| 1521 |
|
| 1522 |
/** |
| 1523 |
* Register a provider CSS URL to fetch. |
| 1524 |
* |
| 1525 |
* @param string $url Normalized URL. |
| 1526 |
* @param string $detector Detector id ('' if from a nested source). |
| 1527 |
*/ |
| 1528 |
private function add_css_url( string $url, string $detector ): void { |
| 1529 |
$this->css_urls[ $url ] = Providers::id_for( $url ); |
| 1530 |
|
| 1531 |
if ( '' !== $detector ) { |
| 1532 |
$this->mark( $detector ); |
| 1533 |
} |
| 1534 |
} |
| 1535 |
|
| 1536 |
/** |
| 1537 |
* Flag a detector as having contributed. |
| 1538 |
* |
| 1539 |
* @param string $detector Detector id. |
| 1540 |
*/ |
| 1541 |
private function mark( string $detector ): void { |
| 1542 |
$this->contributed[ $detector ] = true; |
| 1543 |
} |
| 1544 |
} |
| 1545 |
|
