1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
<?php
/**
* Server-side rendering of the `core/gallery` block.
*
* @package WordPress
*/
/**
* Handles backwards compatibility for Gallery Blocks,
* whose images feature a `data-id` attribute.
*
* Now that the Gallery Block contains inner Image Blocks,
* we add a custom `data-id` attribute before rendering the gallery
* so that the Image Block can pick it up in its render_callback.
*
* @since 5.9.0
*
* @param array $parsed_block The block being rendered.
* @return array The migrated block object.
*/
function block_core_gallery_data_id_backcompatibility( $parsed_block ) {
if ( 'core/gallery' === $parsed_block['blockName'] ) {
foreach ( $parsed_block['innerBlocks'] as $key => $inner_block ) {
if ( 'core/image' === $inner_block['blockName'] ) {
if ( ! isset( $parsed_block['innerBlocks'][ $key ]['attrs']['data-id'] ) && isset( $inner_block['attrs']['id'] ) ) {
$parsed_block['innerBlocks'][ $key ]['attrs']['data-id'] = esc_attr( $inner_block['attrs']['id'] );
}
}
}
}
return $parsed_block;
}
add_filter( 'render_block_data', 'block_core_gallery_data_id_backcompatibility' );
/**
* Renders the `core/gallery` block on the server.
*
* @since 6.0.0
*
* @param array $attributes Attributes of the block being rendered.
* @param string $content Content of the block being rendered.
* @return string The content of the block being rendered.
*/
function block_core_gallery_render( $attributes, $content ) {
// Adds a style tag for the --wp--style--unstable-gallery-gap var.
// The Gallery block needs to recalculate Image block width based on
// the current gap setting in order to maintain the number of flex columns
// so a css var is added to allow this.
$gap = $attributes['style']['spacing']['blockGap'] ?? null;
// Skip if gap value contains unsupported characters.
// Regex for CSS value borrowed from `safecss_filter_attr`, and used here
// because we only want to match against the value, not the CSS attribute.
if ( is_array( $gap ) ) {
foreach ( $gap as $key => $value ) {
// Make sure $value is a string to avoid PHP 8.1 deprecation error in preg_match() when the value is null.
$value = is_string( $value ) ? $value : '';
$value = $value && preg_match( '%[\\\(&=}]|/\*%', $value ) ? null : $value;
// Get spacing CSS variable from preset value if provided.
if ( is_string( $value ) && str_contains( $value, 'var:preset|spacing|' ) ) {
$index_to_splice = strrpos( $value, '|' ) + 1;
$slug = _wp_to_kebab_case( substr( $value, $index_to_splice ) );
$value = "var(--wp--preset--spacing--$slug)";
}
$gap[ $key ] = $value;
}
} else {
// Make sure $gap is a string to avoid PHP 8.1 deprecation error in preg_match() when the value is null.
$gap = is_string( $gap ) ? $gap : '';
$gap = $gap && preg_match( '%[\\\(&=}]|/\*%', $gap ) ? null : $gap;
// Get spacing CSS variable from preset value if provided.
if ( is_string( $gap ) && str_contains( $gap, 'var:preset|spacing|' ) ) {
$index_to_splice = strrpos( $gap, '|' ) + 1;
$slug = _wp_to_kebab_case( substr( $gap, $index_to_splice ) );
$gap = "var(--wp--preset--spacing--$slug)";
}
}
$unique_gallery_classname = wp_unique_id( 'wp-block-gallery-' );
$processed_content = new WP_HTML_Tag_Processor( $content );
$processed_content->next_tag();
$processed_content->add_class( $unique_gallery_classname );
// --gallery-block--gutter-size is deprecated. --wp--style--gallery-gap-default should be used by themes that want to set a default
// gap on the gallery.
$fallback_gap = 'var( --wp--style--gallery-gap-default, var( --gallery-block--gutter-size, var( --wp--style--block-gap, 0.5em ) ) )';
$gap_value = $gap ? $gap : $fallback_gap;
$gap_column = $gap_value;
if ( is_array( $gap_value ) ) {
$gap_row = isset( $gap_value['top'] ) ? $gap_value['top'] : $fallback_gap;
$gap_column = isset( $gap_value['left'] ) ? $gap_value['left'] : $fallback_gap;
$gap_value = $gap_row === $gap_column ? $gap_row : $gap_row . ' ' . $gap_column;
}
// The unstable gallery gap calculation requires a real value (such as `0px`) and not `0`.
if ( '0' === $gap_column ) {
$gap_column = '0px';
}
// Set the CSS variable to the column value, and the `gap` property to the combined gap value.
$gallery_styles = array(
array(
'selector' => ".wp-block-gallery.{$unique_gallery_classname}",
'declarations' => array(
'--wp--style--unstable-gallery-gap' => $gap_column,
'gap' => $gap_value,
),
),
);
wp_style_engine_get_stylesheet_from_css_rules(
$gallery_styles,
array(
'context' => 'block-supports',
)
);
// The WP_HTML_Tag_Processor class calls get_updated_html() internally
// when the instance is treated as a string, but here we explicitly
// convert it to a string.
$updated_content = $processed_content->get_updated_html();
/*
* Randomize the order of image blocks. Ideally we should shuffle
* the `$parsed_block['innerBlocks']` via the `render_block_data` hook.
* However, this hook doesn't apply inner block updates when blocks are
* nested.
* @todo In the future, if this hook supports updating innerBlocks in
* nested blocks, it should be refactored.
*
* @see: https://github.com/WordPress/gutenberg/pull/58733
*/
if ( empty( $attributes['randomOrder'] ) ) {
return $updated_content;
}
// This pattern matches figure elements with the `wp-block-image` class to
// avoid the gallery's wrapping `figure` element and extract images only.
$pattern = '/<figure[^>]*\bwp-block-image\b[^>]*>.*?<\/figure>/';
// Find all Image blocks.
preg_match_all( $pattern, $updated_content, $matches );
if ( ! $matches ) {
return $updated_content;
}
$image_blocks = $matches[0];
// Randomize the order of Image blocks.
shuffle( $image_blocks );
$i = 0;
$content = preg_replace_callback(
$pattern,
static function () use ( $image_blocks, &$i ) {
$new_image_block = $image_blocks[ $i ];
++$i;
return $new_image_block;
},
$updated_content
);
return $content;
}
/**
* Registers the `core/gallery` block on server.
*
* @since 5.9.0
*/
function register_block_core_gallery() {
register_block_type_from_metadata(
__DIR__ . '/gallery',
array(
'render_callback' => 'block_core_gallery_render',
)
);
}
add_action( 'init', 'register_block_core_gallery' );
|
