5 * @package WordPress |
5 * @package WordPress |
6 * @since 5.8.0 |
6 * @since 5.8.0 |
7 */ |
7 */ |
8 |
8 |
9 /** |
9 /** |
10 * Render the elements stylesheet. |
10 * Get the elements class names. |
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11 * |
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12 * @since 6.0.0 |
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13 * @access private |
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14 * |
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15 * @param array $block Block object. |
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16 * @return string The unique class name. |
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17 */ |
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18 function wp_get_elements_class_name( $block ) { |
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19 return 'wp-elements-' . md5( serialize( $block ) ); |
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20 } |
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21 |
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22 /** |
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23 * Update the block content with elements class names. |
11 * |
24 * |
12 * @since 5.8.0 |
25 * @since 5.8.0 |
13 * @access private |
26 * @access private |
14 * |
27 * |
15 * @param string $block_content Rendered block content. |
28 * @param string $block_content Rendered block content. |
16 * @param array $block Block object. |
29 * @param array $block Block object. |
17 * @return string Filtered block content. |
30 * @return string Filtered block content. |
18 */ |
31 */ |
19 function wp_render_elements_support( $block_content, $block ) { |
32 function wp_render_elements_support( $block_content, $block ) { |
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33 if ( ! $block_content ) { |
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34 return $block_content; |
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35 } |
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36 |
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37 $block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] ); |
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38 $skip_link_color_serialization = wp_should_skip_block_supports_serialization( $block_type, 'color', 'link' ); |
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39 |
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40 if ( $skip_link_color_serialization ) { |
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41 return $block_content; |
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42 } |
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43 |
20 $link_color = null; |
44 $link_color = null; |
21 if ( ! empty( $block['attrs'] ) ) { |
45 if ( ! empty( $block['attrs'] ) ) { |
22 $link_color = _wp_array_get( $block['attrs'], array( 'style', 'elements', 'link', 'color', 'text' ), null ); |
46 $link_color = _wp_array_get( $block['attrs'], array( 'style', 'elements', 'link', 'color', 'text' ), null ); |
23 } |
47 } |
24 |
48 |
25 /* |
49 /* |
26 * For now we only care about link color. |
50 * For now we only care about link color. |
27 * This code in the future when we have a public API |
51 * This code in the future when we have a public API |
28 * should take advantage of WP_Theme_JSON::compute_style_properties |
52 * should take advantage of WP_Theme_JSON::compute_style_properties |
29 * and work for any element and style. |
53 * and work for any element and style. |
30 */ |
54 */ |
31 if ( null === $link_color ) { |
55 if ( null === $link_color ) { |
32 return $block_content; |
56 return $block_content; |
33 } |
57 } |
34 |
58 |
35 $class_name = 'wp-elements-' . uniqid(); |
59 $class_name = wp_get_elements_class_name( $block ); |
36 |
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37 if ( strpos( $link_color, 'var:preset|color|' ) !== false ) { |
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38 // Get the name from the string and add proper styles. |
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39 $index_to_splice = strrpos( $link_color, '|' ) + 1; |
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40 $link_color_name = substr( $link_color, $index_to_splice ); |
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41 $link_color = "var(--wp--preset--color--$link_color_name)"; |
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42 } |
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43 $link_color_declaration = esc_html( safecss_filter_attr( "color: $link_color" ) ); |
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44 |
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45 $style = "<style>.$class_name a{" . $link_color_declaration . " !important;}</style>\n"; |
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46 |
60 |
47 // Like the layout hook this assumes the hook only applies to blocks with a single wrapper. |
61 // Like the layout hook this assumes the hook only applies to blocks with a single wrapper. |
48 // Retrieve the opening tag of the first HTML element. |
62 // Retrieve the opening tag of the first HTML element. |
49 $html_element_matches = array(); |
63 $html_element_matches = array(); |
50 preg_match( '/<[^>]+>/', $block_content, $html_element_matches, PREG_OFFSET_CAPTURE ); |
64 preg_match( '/<[^>]+>/', $block_content, $html_element_matches, PREG_OFFSET_CAPTURE ); |
62 // If the first HTML element has no class attribute we should inject the attribute before the attribute at the end. |
76 // If the first HTML element has no class attribute we should inject the attribute before the attribute at the end. |
63 $first_element_offset = $html_element_matches[0][1]; |
77 $first_element_offset = $html_element_matches[0][1]; |
64 $content = substr_replace( $block_content, ' class="' . $class_name . '"', $first_element_offset + strlen( $first_element ) - 1, 0 ); |
78 $content = substr_replace( $block_content, ' class="' . $class_name . '"', $first_element_offset + strlen( $first_element ) - 1, 0 ); |
65 } |
79 } |
66 |
80 |
67 return $content . $style; |
81 return $content; |
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82 } |
68 |
83 |
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84 /** |
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85 * Render the elements stylesheet. |
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86 * |
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87 * In the case of nested blocks we want the parent element styles to be rendered before their descendants. |
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88 * This solves the issue of an element (e.g.: link color) being styled in both the parent and a descendant: |
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89 * we want the descendant style to take priority, and this is done by loading it after, in DOM order. |
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90 * |
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91 * @since 6.0.0 |
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92 * @access private |
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93 * |
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94 * @param string|null $pre_render The pre-rendered content. Default null. |
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95 * @param array $block The block being rendered. |
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96 * |
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97 * @return null |
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98 */ |
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99 function wp_render_elements_support_styles( $pre_render, $block ) { |
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100 $block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] ); |
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101 $skip_link_color_serialization = wp_should_skip_block_supports_serialization( $block_type, 'color', 'link' ); |
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102 if ( $skip_link_color_serialization ) { |
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103 return null; |
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104 } |
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105 |
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106 $link_color = null; |
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107 if ( ! empty( $block['attrs'] ) ) { |
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108 $link_color = _wp_array_get( $block['attrs'], array( 'style', 'elements', 'link', 'color', 'text' ), null ); |
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109 } |
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110 |
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111 /* |
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112 * For now we only care about link color. |
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113 * This code in the future when we have a public API |
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114 * should take advantage of WP_Theme_JSON::compute_style_properties |
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115 * and work for any element and style. |
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116 */ |
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117 if ( null === $link_color ) { |
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118 return null; |
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119 } |
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120 |
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121 $class_name = wp_get_elements_class_name( $block ); |
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122 |
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123 if ( strpos( $link_color, 'var:preset|color|' ) !== false ) { |
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124 // Get the name from the string and add proper styles. |
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125 $index_to_splice = strrpos( $link_color, '|' ) + 1; |
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126 $link_color_name = substr( $link_color, $index_to_splice ); |
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127 $link_color = "var(--wp--preset--color--$link_color_name)"; |
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128 } |
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129 $link_color_declaration = esc_html( safecss_filter_attr( "color: $link_color" ) ); |
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130 |
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131 $style = ".$class_name a{" . $link_color_declaration . ';}'; |
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132 |
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133 wp_enqueue_block_support_styles( $style ); |
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134 |
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135 return null; |
69 } |
136 } |
70 |
137 |
71 add_filter( 'render_block', 'wp_render_elements_support', 10, 2 ); |
138 add_filter( 'render_block', 'wp_render_elements_support', 10, 2 ); |
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139 add_filter( 'pre_render_block', 'wp_render_elements_support_styles', 10, 2 ); |