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<?php

function wp_register_alignment_support($block_type)
{
    $has_align_support = false;
    if (property_exists($block_type, 'supports')) {
        $has_align_support = _wp_array_get($block_type->supports, array('align'), false);
    }
    if ($has_align_support) {
        if (!$block_type->attributes) {
            $block_type->attributes = array();
        }
        if (!array_key_exists('align', $block_type->attributes)) {
            $block_type->attributes['align'] = array('type' => 'string', 'enum' => array('left', 'center', 'right', 'wide', 'full', ''));
        }
    }
}
function wp_apply_alignment_support($block_type, $block_attributes)
{
    $attributes = array();
    $has_align_support = false;
    if (property_exists($block_type, 'supports')) {
        $has_align_support = _wp_array_get($block_type->supports, array('align'), false);
    }
    if ($has_align_support) {
        $has_block_alignment = array_key_exists('align', $block_attributes);
        if ($has_block_alignment) {
            $attributes['class'] = sprintf('align%s', $block_attributes['align']);
        }
    }
    return $attributes;
}
WP_Block_Supports::get_instance()->register('align', array('register_attribute' => 'wp_register_alignment_support', 'apply' => 'wp_apply_alignment_support'));