<?php

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/**

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* Align block support flag.

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*

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* @package WordPress

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*/

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/**

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

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*

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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_alignment_support( $block_type ) {

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$has_align_support = false;

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if ( property_exists( $block_type, 'supports' ) ) {

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$has_align_support = _wp_array_get( $block_type->supports, array( 'align' ), false );

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}

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if ( $has_align_support ) {

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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 ( ! array_key_exists( 'align', $block_type->attributes ) ) {

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

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'type' => 'string',

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'enum' => array( 'left', 'center', 'right', 'wide', 'full', '' ),

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);

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}

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}

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}

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/**

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* Add CSS classes for block alignment 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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* @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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*

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

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*/

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function wp_apply_alignment_support( $block_type, $block_attributes ) {

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$attributes = array();

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$has_align_support = false;

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if ( property_exists( $block_type, 'supports' ) ) {

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$has_align_support = _wp_array_get( $block_type->supports, array( 'align' ), false );

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}

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if ( $has_align_support ) {

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$has_block_alignment = array_key_exists( 'align', $block_attributes );

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if ( $has_block_alignment ) {

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$attributes['class'] = sprintf( 'align%s', $block_attributes['align'] );

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}

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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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'align',

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array(

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'register_attribute' => 'wp_register_alignment_support',

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'apply' => 'wp_apply_alignment_support',

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)

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);

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