<?php

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/**

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* Spacing block support flag.

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*

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* For backwards compatibility, this remains separate to the dimensions.php

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* block support despite both belonging under a single panel in the editor.

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*

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* @package WordPress

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* @since 5.8.0

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*/

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/**

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* Registers the style block attribute for block types that support it.

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*

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* @since 5.8.0

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* @access private

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*

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* @param WP_Block_Type $block_type Block Type.

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*/

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function wp_register_spacing_support( $block_type ) {

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$has_spacing_support = block_has_support( $block_type, 'spacing', false );

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// Setup attributes and styles within that if needed.

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if ( ! $block_type->attributes ) {

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$block_type->attributes = array();

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}

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if ( $has_spacing_support && ! array_key_exists( 'style', $block_type->attributes ) ) {

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$block_type->attributes['style'] = array(

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'type' => 'object',

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);

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}

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}

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/**

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* Adds CSS classes for block spacing to the incoming attributes array.

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* This will be applied to the block markup in the front-end.

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*

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* @since 5.8.0

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* @since 6.1.0 Implemented the style engine to generate CSS and classnames.

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* @access private

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*

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* @param WP_Block_Type $block_type Block Type.

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* @param array $block_attributes Block attributes.

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* @return array Block spacing CSS classes and inline styles.

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*/

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function wp_apply_spacing_support( $block_type, $block_attributes ) {

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if ( wp_should_skip_block_supports_serialization( $block_type, 'spacing' ) ) {

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return array();

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}

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$attributes = array();

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$has_padding_support = block_has_support( $block_type, array( 'spacing', 'padding' ), false );

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$has_margin_support = block_has_support( $block_type, array( 'spacing', 'margin' ), false );

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$block_styles = isset( $block_attributes['style'] ) ? $block_attributes['style'] : null;

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if ( ! $block_styles ) {

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return $attributes;

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}

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$skip_padding = wp_should_skip_block_supports_serialization( $block_type, 'spacing', 'padding' );

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$skip_margin = wp_should_skip_block_supports_serialization( $block_type, 'spacing', 'margin' );

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$spacing_block_styles = array(

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'padding' => null,

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'margin' => null,

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);

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if ( $has_padding_support && ! $skip_padding ) {

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$spacing_block_styles['padding'] = isset( $block_styles['spacing']['padding'] ) ? $block_styles['spacing']['padding'] : null;

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}

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if ( $has_margin_support && ! $skip_margin ) {

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$spacing_block_styles['margin'] = isset( $block_styles['spacing']['margin'] ) ? $block_styles['spacing']['margin'] : null;

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}

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$styles = wp_style_engine_get_styles( array( 'spacing' => $spacing_block_styles ) );

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if ( ! empty( $styles['css'] ) ) {

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$attributes['style'] = $styles['css'];

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}

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return $attributes;

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}

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// Register the block support.

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WP_Block_Supports::get_instance()->register(

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'spacing',

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array(

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'register_attribute' => 'wp_register_spacing_support',

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'apply' => 'wp_apply_spacing_support',

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)

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);

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