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Editing: button.php
<?php /** * Server-side rendering of the `core/button` block. * * @package WordPress */ /** * Renders the `core/button` block on the server, * * @since 6.6.0 * * @param array $attributes The block attributes. * @param string $content The block content. * * @return string The block content. */ function render_block_core_button( $attributes, $content ) { $p = new WP_HTML_Tag_Processor( $content ); /* * The button block can render an `<a>` or `<button>` and also has a * `<div>` wrapper. Find the a or button tag. */ $tag = null; while ( $p->next_tag() ) { $tag = $p->get_tag(); if ( 'A' === $tag || 'BUTTON' === $tag ) { break; } } /* * If this happens, the likelihood is there's no block content, * or the block has been modified by a plugin. */ if ( null === $tag ) { return $content; } // If the next token is the closing tag, the button is empty. $is_empty = true; while ( $p->next_token() && $tag !== $p->get_token_name() && $is_empty ) { if ( '#comment' !== $p->get_token_type() ) { /** * Anything else implies this is not empty. * This might include any text content (including a space), * inline images or other HTML. */ $is_empty = false; } } /* * When there's no text, render nothing for the block. * See https://github.com/WordPress/gutenberg/issues/17221 for the * reasoning behind this. */ if ( $is_empty ) { return ''; } $width = $attributes['style']['dimensions']['width'] ?? null; if ( $width ) { // Resolve preset references to their actual values. $resolved_width = $width; $is_preset = str_starts_with( $width, 'var:preset|dimension|' ); if ( $is_preset ) { $slug = substr( $width, strlen( 'var:preset|dimension|' ) ); $dimension_presets = wp_get_global_settings( array( 'dimensions', 'dimensionSizes' ), array( 'block_name' => 'core/button' ) ); // Search origins in priority order: custom > theme > default. if ( is_array( $dimension_presets ) ) { foreach ( array( 'custom', 'theme', 'default' ) as $origin ) { if ( empty( $dimension_presets[ $origin ] ) || ! is_array( $dimension_presets[ $origin ] ) ) { continue; } foreach ( $dimension_presets[ $origin ] as $preset ) { if ( isset( $preset['slug'] ) && $preset['slug'] === $slug ) { $resolved_width = $preset['size'] ?? $width; break 2; } } } } } $is_percentage = str_ends_with( $resolved_width, '%' ); $processor = new WP_HTML_Tag_Processor( $content ); // Target the outer wrapper div. if ( $processor->next_tag( array( 'class_name' => 'wp-block-button' ) ) ) { $processor->add_class( 'has-custom-width' ); $existing_style = $processor->get_attribute( 'style' ); $existing_style = is_string( $existing_style ) ? $existing_style : ''; if ( $is_percentage ) { $numeric_width = (float) $resolved_width; $processor->add_class( 'wp-block-button__width' ); // Maintain legacy class for the standard percentage widths. $legacy_widths = array( '25%' => 'wp-block-button__width-25', '50%' => 'wp-block-button__width-50', '75%' => 'wp-block-button__width-75', '100%' => 'wp-block-button__width-100', ); if ( isset( $legacy_widths[ $resolved_width ] ) ) { $processor->add_class( $legacy_widths[ $resolved_width ] ); } $width_style = "--wp--block-button--width: $numeric_width;"; $processor->set_attribute( 'style', $width_style . ( $existing_style ? ' ' . $existing_style : '' ) ); } else { $css_value = $is_preset ? 'var(--wp--preset--dimension--' . _wp_to_kebab_case( $slug ) . ')' : $width; $width_style = "width: $css_value;"; $processor->set_attribute( 'style', $width_style . ( $existing_style ? ' ' . $existing_style : '' ) ); } $content = $processor->get_updated_html(); } } return $content; } /** * Registers the `core/button` block on server. * * @since 6.6.0 */ function register_block_core_button() { register_block_type_from_metadata( __DIR__ . '/button', array( 'render_callback' => 'render_block_core_button', ) ); } add_action( 'init', 'register_block_core_button' );
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