slider-blocks / includes / Assets / LoadFonts.php

LoadFonts.php in GutSlider – All in One Slider and Carousel Blocks for Gutenberg 2.13.0, at includes/Assets/LoadFonts.php

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1	<?php
2	declare( strict_types=1 );
3
4	namespace GutSlider\Assets;
5
6	if ( ! defined( 'ABSPATH' ) ) {
7	exit;
8	}
9
10	/**
11	* Handles loading of Google Fonts used in slider blocks.
12	*
13	* Collects font family attributes from rendered blocks and enqueues
14	* the corresponding Google Fonts stylesheets.
15	*
16	* @package GutSlider\Assets
17	* @since 3.0.0
18	*/
19	final class LoadFonts {
20
21	/**
22	* System fonts that do not need to be loaded from Google Fonts.
23	*
24	* @since 3.0.0
25	* @var array<int, string>
26	*/
27	private const SYSTEM_FONTS = array(
28	'Arial',
29	'Tahoma',
30	'Verdana',
31	'Helvetica',
32	'Times New Roman',
33	'Trebuchet MS',
34	'Georgia',
35	);
36
37	/**
38	* Collected font families from rendered blocks.
39	*
40	* @since 3.0.0
41	* @var array<int, string>
42	*/
43	private static array $all_fonts = array();
44
45	/**
46	* Constructor.
47	*
48	* Registers WordPress hooks for font loading.
49	*
50	* @since 3.0.0
51	*/
52	public function __construct() {
53	add_action( 'wp_enqueue_scripts', array( $this, 'fonts_loader' ), 10 );
54	add_action( 'admin_enqueue_scripts', array( $this, 'fonts_loader' ), 10 );
55	add_action( 'gutsliders_render_block', array( $this, 'font_generator' ) );
56	}
57
58	/**
59	* Extract font families from a rendered block's attributes.
60	*
61	* Scans block attributes for font family values and triggers
62	* the font loader to enqueue any new fonts found.
63	*
64	* @since 3.0.0
65	*
66	* @param array<string, mixed> $block The block data array.
67	* @return void
68	*/
69	public function font_generator( array $block ): void {
70	if ( isset( $block['attrs'] ) && is_array( $block['attrs'] ) ) {
71	$attributes = $block['attrs'];
72
73	foreach ( $attributes as $key => $value ) {
74	if ( ! empty( $value )
75	&& is_string( $value )
76	&& strpos( $key, 'gutsliders_' ) === 0
77	&& strpos( $key, 'FontFamily' ) !== false
78	) {
79	self::$all_fonts[] = sanitize_text_field( $value );
80	}
81	}
82
83	$this->fonts_loader();
84	}
85	}
86
87	/**
88	* Enqueue Google Fonts stylesheets for collected font families.
89	*
90	* Filters out system fonts and duplicates, then registers and
91	* enqueues individual Google Fonts CSS files.
92	*
93	* @since 3.0.0
94	*
95	* @return void
96	*/
97	public function fonts_loader(): void {
98	if ( ! is_array( self::$all_fonts ) \|\| count( self::$all_fonts ) === 0 ) {
99	return;
100	}
101
102	$fonts = array_filter( array_unique( self::$all_fonts ) );
103
104	if ( empty( $fonts ) ) {
105	return;
106	}
107
108	$gfonts_attr = ':100,200,300,400,500,600,700,800,900';
109
110	foreach ( $fonts as $font ) {
111	if ( in_array( $font, self::SYSTEM_FONTS, true ) \|\| empty( $font ) ) {
112	continue;
113	}
114
115	$font_family = str_replace( ' ', '+', trim( $font ) ) . $gfonts_attr;
116	$query_args = array( 'family' => $font_family );
117	$font_handle = 'gutsliders-font-' . sanitize_title( $font );
118
119	wp_register_style(
120	$font_handle,
121	add_query_arg( $query_args, '//fonts.googleapis.com/css' ),
122	array(),
123	GUTSLIDER_VERSION,
124	'all'
125	);
126
127	wp_enqueue_style( $font_handle );
128	}
129	}
130	}
131