wp-includes/class-wp-theme-json.php:3176Merges new incoming data.
$incomingWP_Theme_JSON public function merge( $incoming ) { $incoming_data = $incoming->get_raw_data(); $this->theme_json = array_replace_recursive( $this->theme_json, $incoming_data ); /* * Recompute all the spacing sizes based on the new hierarchy of data. In the constructor * spacingScale and spacingSizes are both keyed by origin and VALID_ORIGINS is ordered, so * we can allow partial spacingScale data to inherit missing data from earlier layers when * computing the spacing sizes. * * This happens before the presets are merged to ensure that default spacing sizes can be * removed from the theme origin if $prevent_override is true. */ $flattened_spacing_scale = array(); foreach ( static::VALID_ORIGINS as $origin ) { $scale_path = array( 'settings', 'spacing', 'spacingScale', $origin ); // Apply the base spacing scale to the current layer. $base_spacing_scale = _wp_array_get( $this->theme_json, $scale_path, array() ); $flattened_spacing_scale = array_replace( $flattened_spacing_scale, $base_spacing_scale ); $spacing_scale = _wp_array_get( $incoming_data, $scale_path, null ); if ( ! isset( $spacing_scale ) ) { continue; } // Allow partial scale settings by merging with lower layers. $flattened_spacing_scale = array_replace( $flattened_spacing_scale, $spacing_scale ); // Generate and merge the scales for this layer. $sizes_path = array( 'settings', 'spacing', 'spacingSizes', $origin ); $spacing_sizes = _wp_array_get( $incoming_data, $sizes_path, array() ); $spacing_scale_sizes = static::compute_spacing_sizes( $flattened_spacing_scale ); $merged_spacing_sizes = static::merge_spacing_sizes( $spacing_scale_sizes, $spacing_sizes ); _wp_array_set( $incoming_data, $sizes_path, $merged_spacing_sizes ); } /* * The array_replace_recursive algorithm merges at the leaf level, * but we don't want leaf arrays to be merged, so we overwrite it. * * For leaf values that are sequential arrays it will use the numeric indexes for replacement. * We rather replace the existing with the incoming value, if it exists. * This is the case of spacing.units. * * For leaf values that are associative arrays it will merge them as expected. * This is also not the behavior we want for the current associative arrays (presets). * We rather replace the existing with the incoming value, if it exists. * This happens, for example, when we merge data from theme.json upon existing * theme supports or when we merge anything coming from the same source twice. * This is the case of color.palette, color.gradients, color.duotone, * typography.fontSizes, or typography.fontFamilies. * * Additionally, for some preset types, we also want to make sure the * values they introduce don't conflict with default values. We do so * by checking the incoming slugs for theme presets and compare them * with the equivalent default presets: if a slug is present as a default * we remove it from the theme presets. */ $nodes = static::get_setting_nodes( $incoming_data ); $slugs_global = static::get_default_slugs( $this->theme_json, array( 'settings' ) ); foreach ( $nodes as $node ) { // Replace the spacing.units. $path = $node['path']; $path[] = 'spacing'; $path[] = 'units'; $content = _wp_array_get( $incoming_data, $path, null ); if ( isset( $content ) ) { _wp_array_set( $this->theme_json, $path, $content ); } // Replace the presets. foreach ( static::PRESETS_METADATA as $preset_metadata ) { $prevent_override = $preset_metadata['prevent_override']; if ( is_array( $prevent_override ) ) { $global_path = array_merge( array( 'settings' ), $prevent_override ); $global_value = _wp_array_get( $this->theme_json, $global_path, null );Introduced in 5.8.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-theme-json.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.