| 1 |
<?php |
| 2 |
/** |
| 3 |
* Smart preload. |
| 4 |
* |
| 5 |
* Emits <link rel="preload"> for the font variants the user has marked to |
| 6 |
* preload (Fonts screen → per-variant Preload toggle). Results are deduped by |
| 7 |
* file and capped, and the output buffer positions them ABOVE the consolidated |
| 8 |
* stylesheet so the browser starts fetching them as early as possible. |
| 9 |
* |
| 10 |
* When "smart preload" is enabled, the beacon auto-marks above-the-fold variants |
| 11 |
* as preloaded after a real visit (see RestApi::beacon), so this populates with |
| 12 |
* sensible defaults that the user can then refine. |
| 13 |
* |
| 14 |
* @package EasyFonts |
| 15 |
*/ |
| 16 |
|
| 17 |
namespace EasyFonts\Frontend; |
| 18 |
|
| 19 |
use EasyFonts\Fonts\Registry; |
| 20 |
use EasyFonts\Fonts\Storage; |
| 21 |
use EasyFonts\Settings; |
| 22 |
|
| 23 |
defined( 'ABSPATH' ) || exit; |
| 24 |
|
| 25 |
/** |
| 26 |
* Builds deduped preload link markup. |
| 27 |
*/ |
| 28 |
class SmartPreload { |
| 29 |
|
| 30 |
/** |
| 31 |
* @var Registry |
| 32 |
*/ |
| 33 |
private Registry $registry; |
| 34 |
|
| 35 |
/** |
| 36 |
* @var Storage |
| 37 |
*/ |
| 38 |
private Storage $storage; |
| 39 |
|
| 40 |
/** |
| 41 |
* Constructor. |
| 42 |
*/ |
| 43 |
public function __construct() { |
| 44 |
$this->registry = new Registry(); |
| 45 |
$this->storage = new Storage(); |
| 46 |
} |
| 47 |
|
| 48 |
/** |
| 49 |
* Build preload markup for the current request. |
| 50 |
* |
| 51 |
* @return string |
| 52 |
*/ |
| 53 |
public function build(): string { |
| 54 |
if ( ! Settings::get( 'smart_preload', 1 ) ) { |
| 55 |
return ''; |
| 56 |
} |
| 57 |
|
| 58 |
$targets = $this->registry->preload_targets(); |
| 59 |
|
| 60 |
if ( empty( $targets ) ) { |
| 61 |
return ''; |
| 62 |
} |
| 63 |
|
| 64 |
$links = ''; |
| 65 |
$seen = array(); |
| 66 |
$count = 0; |
| 67 |
|
| 68 |
foreach ( $targets as $t ) { |
| 69 |
if ( $count >= 6 ) { |
| 70 |
break; // Hard cap — preloading too much hurts more than it helps. |
| 71 |
} |
| 72 |
|
| 73 |
$file = $t['file']; |
| 74 |
|
| 75 |
if ( '' === $file || isset( $seen[ $file ] ) || ! $this->storage->exists( $file ) ) { |
| 76 |
continue; |
| 77 |
} |
| 78 |
|
| 79 |
$seen[ $file ] = true; |
| 80 |
|
| 81 |
$url = add_query_arg( 'ver', Settings::buster(), $this->storage->url( $file ) ); |
| 82 |
$links .= sprintf( |
| 83 |
'<link rel="preload" href="%s" as="font" type="%s" crossorigin>' . "\n", |
| 84 |
esc_url( $url ), |
| 85 |
esc_attr( $this->mime_for( $file ) ) |
| 86 |
); |
| 87 |
$count++; |
| 88 |
} |
| 89 |
|
| 90 |
return $links; |
| 91 |
} |
| 92 |
|
| 93 |
/** |
| 94 |
* MIME for a font file. |
| 95 |
* |
| 96 |
* @param string $file Filename. |
| 97 |
* @return string |
| 98 |
*/ |
| 99 |
private function mime_for( string $file ): string { |
| 100 |
$ext = strtolower( (string) pathinfo( $file, PATHINFO_EXTENSION ) ); |
| 101 |
|
| 102 |
$map = array( |
| 103 |
'woff2' => 'font/woff2', |
| 104 |
'woff' => 'font/woff', |
| 105 |
'ttf' => 'font/ttf', |
| 106 |
'otf' => 'font/otf', |
| 107 |
); |
| 108 |
|
| 109 |
return $map[ $ext ] ?? 'font/woff2'; |
| 110 |
} |
| 111 |
} |
| 112 |
|
