1 | <?php |
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2 | /** |
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3 | * Adds the Webfont Loader to load fonts asyncronously. |
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4 | * |
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5 | * @package Kirki |
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6 | * @category Core |
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7 | * @author Aristeides Stathopoulos |
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8 | * @copyright Copyright (c) 2017, Aristeides Stathopoulos |
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9 | * @license https://opensource.org/licenses/MIT |
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10 | * @since 3.0 |
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11 | */ |
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12 | |||
13 | /** |
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14 | * Manages the way Google Fonts are enqueued. |
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15 | */ |
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16 | final class Kirki_Modules_Webfonts_Async { |
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17 | |||
18 | /** |
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19 | * The config ID. |
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20 | * |
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21 | * @access protected |
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22 | * @since 3.0.0 |
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23 | * @var string |
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24 | */ |
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25 | protected $config_id; |
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26 | |||
27 | /** |
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28 | * The Kirki_Modules_Webfonts object. |
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29 | * |
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30 | * @access protected |
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31 | * @since 3.0.0 |
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32 | * @var object |
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33 | */ |
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34 | protected $webfonts; |
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35 | |||
36 | /** |
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37 | * The Kirki_Fonts_Google object. |
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38 | * |
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39 | * @access protected |
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40 | * @since 3.0.0 |
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41 | * @var object |
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42 | */ |
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43 | protected $googlefonts; |
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44 | |||
45 | /** |
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46 | * Fonts to load. |
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47 | * |
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48 | * @access protected |
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49 | * @since 3.0.26 |
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50 | * @var array |
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51 | */ |
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52 | protected $fonts_to_load = array(); |
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53 | |||
54 | /** |
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55 | * Constructor. |
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56 | * |
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57 | * @access public |
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58 | * @since 3.0 |
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59 | * @param string $config_id The config-ID. |
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60 | * @param object $webfonts The Kirki_Modules_Webfonts object. |
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61 | * @param object $googlefonts The Kirki_Fonts_Google object. |
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62 | * @param array $args Extra args we want to pass. |
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63 | */ |
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64 | public function __construct( $config_id, $webfonts, $googlefonts, $args = array() ) { |
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65 | $this->config_id = $config_id; |
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66 | $this->webfonts = $webfonts; |
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67 | $this->googlefonts = $googlefonts; |
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68 | |||
69 | add_action( 'wp_head', array( $this, 'webfont_loader' ) ); |
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70 | add_action( 'wp_head', array( $this, 'webfont_loader_script' ), 30 ); |
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71 | |||
72 | // Add these in the dashboard to support editor-styles. |
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73 | add_action( 'admin_enqueue_scripts', array( $this, 'webfont_loader' ) ); |
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74 | add_action( 'admin_enqueue_scripts', array( $this, 'webfont_loader_script' ), 30 ); |
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75 | |||
76 | add_filter( 'wp_resource_hints', array( $this, 'resource_hints' ), 10, 2 ); |
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77 | } |
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78 | |||
79 | /** |
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80 | * Add preconnect for Google Fonts. |
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81 | * |
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82 | * @access public |
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83 | * @param array $urls URLs to print for resource hints. |
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84 | * @param string $relation_type The relation type the URLs are printed. |
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85 | * @return array $urls URLs to print for resource hints. |
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86 | */ |
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87 | public function resource_hints( $urls, $relation_type ) { |
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88 | $fonts_to_load = $this->googlefonts->fonts; |
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89 | |||
90 | if ( ! empty( $fonts_to_load ) && 'preconnect' === $relation_type ) { |
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91 | $urls[] = array( |
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92 | 'href' => 'https://fonts.gstatic.com', |
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93 | 'crossorigin', |
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94 | ); |
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95 | } |
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96 | return $urls; |
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97 | } |
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98 | |||
99 | /** |
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100 | * Webfont Loader for Google Fonts. |
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101 | * |
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102 | * @access public |
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103 | * @since 3.0.0 |
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104 | */ |
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105 | public function webfont_loader() { |
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106 | |||
107 | // Go through our fields and populate $this->fonts. |
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108 | $this->webfonts->loop_fields( $this->config_id ); |
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109 | |||
110 | $this->googlefonts->fonts = apply_filters( 'kirki_enqueue_google_fonts', $this->googlefonts->fonts ); |
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111 | |||
112 | // Goes through $this->fonts and adds or removes things as needed. |
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113 | $this->googlefonts->process_fonts(); |
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114 | |||
115 | foreach ( $this->googlefonts->fonts as $font => $weights ) { |
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116 | foreach ( $weights as $key => $value ) { |
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117 | if ( 'italic' === $value ) { |
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118 | $weights[ $key ] = '400i'; |
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119 | } else { |
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120 | $weights[ $key ] = str_replace( array( 'regular', 'bold', 'italic' ), array( '400', '', 'i' ), $value ); |
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121 | } |
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122 | } |
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123 | $this->fonts_to_load[] = $font . ':' . join( ',', $weights ) . ':cyrillic,cyrillic-ext,devanagari,greek,greek-ext,khmer,latin,latin-ext,vietnamese,hebrew,arabic,bengali,gujarati,tamil,telugu,thai'; |
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124 | } |
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125 | if ( ! empty( $this->fonts_to_load ) ) { |
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126 | Kirki_Modules_Webfont_Loader::$load = true; |
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127 | } |
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128 | } |
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129 | |||
130 | /** |
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131 | * Webfont Loader script for Google Fonts. |
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132 | * |
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133 | * @access public |
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134 | * @since 3.0.0 |
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135 | */ |
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136 | public function webfont_loader_script() { |
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137 | if ( ! empty( $this->fonts_to_load ) ) { |
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138 | wp_add_inline_script( |
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139 | 'webfont-loader', |
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140 | 'WebFont.load({google:{families:[\'' . join( '\', \'', $this->fonts_to_load ) . '\']}});', |
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141 | 'after' |
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142 | ); |
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143 | } |
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144 | } |
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145 | } |
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146 |
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