|
1 <?php |
|
2 /** |
|
3 * Server-side rendering of the `core/gallery` block. |
|
4 * |
|
5 * @package WordPress |
|
6 */ |
|
7 |
|
8 /** |
|
9 * Handles backwards compatibility for Gallery Blocks, |
|
10 * whose images feature a `data-id` attribute. |
|
11 * |
|
12 * Now that the Gallery Block contains inner Image Blocks, |
|
13 * we add a custom `data-id` attribute before rendering the gallery |
|
14 * so that the Image Block can pick it up in its render_callback. |
|
15 * |
|
16 * @param array $parsed_block The block being rendered. |
|
17 * @return array The migrated block object. |
|
18 */ |
|
19 function block_core_gallery_data_id_backcompatibility( $parsed_block ) { |
|
20 if ( 'core/gallery' === $parsed_block['blockName'] ) { |
|
21 foreach ( $parsed_block['innerBlocks'] as $key => $inner_block ) { |
|
22 if ( 'core/image' === $inner_block['blockName'] ) { |
|
23 if ( ! isset( $parsed_block['innerBlocks'][ $key ]['attrs']['data-id'] ) && isset( $inner_block['attrs']['id'] ) ) { |
|
24 $parsed_block['innerBlocks'][ $key ]['attrs']['data-id'] = esc_attr( $inner_block['attrs']['id'] ); |
|
25 } |
|
26 } |
|
27 } |
|
28 } |
|
29 |
|
30 return $parsed_block; |
|
31 } |
|
32 |
|
33 add_filter( 'render_block_data', 'block_core_gallery_data_id_backcompatibility' ); |
|
34 |
|
35 /** |
|
36 * Adds a style tag for the --wp--style--unstable-gallery-gap var. |
|
37 * |
|
38 * The Gallery block needs to recalculate Image block width based on |
|
39 * the current gap setting in order to maintain the number of flex columns |
|
40 * so a css var is added to allow this. |
|
41 * |
|
42 * @param array $attributes Attributes of the block being rendered. |
|
43 * @param string $content Content of the block being rendered. |
|
44 * @return string The content of the block being rendered. |
|
45 */ |
|
46 function block_core_gallery_render( $attributes, $content ) { |
|
47 $gap = _wp_array_get( $attributes, array( 'style', 'spacing', 'blockGap' ) ); |
|
48 // Skip if gap value contains unsupported characters. |
|
49 // Regex for CSS value borrowed from `safecss_filter_attr`, and used here |
|
50 // because we only want to match against the value, not the CSS attribute. |
|
51 if ( is_array( $gap ) ) { |
|
52 foreach ( $gap as $key => $value ) { |
|
53 $gap[ $key ] = $value && preg_match( '%[\\\(&=}]|/\*%', $value ) ? null : $value; |
|
54 } |
|
55 } else { |
|
56 $gap = $gap && preg_match( '%[\\\(&=}]|/\*%', $gap ) ? null : $gap; |
|
57 } |
|
58 |
|
59 $class = wp_unique_id( 'wp-block-gallery-' ); |
|
60 $content = preg_replace( |
|
61 '/' . preg_quote( 'class="', '/' ) . '/', |
|
62 'class="' . $class . ' ', |
|
63 $content, |
|
64 1 |
|
65 ); |
|
66 |
|
67 // --gallery-block--gutter-size is deprecated. --wp--style--gallery-gap-default should be used by themes that want to set a default |
|
68 // gap on the gallery. |
|
69 $fallback_gap = 'var( --wp--style--gallery-gap-default, var( --gallery-block--gutter-size, var( --wp--style--block-gap, 0.5em ) ) )'; |
|
70 $gap_value = $gap ? $gap : $fallback_gap; |
|
71 $gap_column = $gap_value; |
|
72 |
|
73 if ( is_array( $gap_value ) ) { |
|
74 $gap_row = isset( $gap_value['top'] ) ? $gap_value['top'] : $fallback_gap; |
|
75 $gap_column = isset( $gap_value['left'] ) ? $gap_value['left'] : $fallback_gap; |
|
76 $gap_value = $gap_row === $gap_column ? $gap_row : $gap_row . ' ' . $gap_column; |
|
77 } |
|
78 |
|
79 // Set the CSS variable to the column value, and the `gap` property to the combined gap value. |
|
80 $style = '.' . $class . '{ --wp--style--unstable-gallery-gap: ' . $gap_column . '; gap: ' . $gap_value . '}'; |
|
81 |
|
82 // Ideally styles should be loaded in the head, but blocks may be parsed |
|
83 // after that, so loading in the footer for now. |
|
84 // See https://core.trac.wordpress.org/ticket/53494. |
|
85 add_action( |
|
86 'wp_footer', |
|
87 function () use ( $style ) { |
|
88 echo '<style> ' . $style . '</style>'; |
|
89 }, |
|
90 11 |
|
91 ); |
|
92 return $content; |
|
93 } |
|
94 /** |
|
95 * Registers the `core/gallery` block on server. |
|
96 */ |
|
97 function register_block_core_gallery() { |
|
98 register_block_type_from_metadata( |
|
99 __DIR__ . '/gallery', |
|
100 array( |
|
101 'render_callback' => 'block_core_gallery_render', |
|
102 ) |
|
103 ); |
|
104 } |
|
105 |
|
106 add_action( 'init', 'register_block_core_gallery' ); |