<?php
add_action( 'wp_enqueue_scripts', 'my_theme_enqueue_styles' );
function my_theme_enqueue_styles() {
 
    $parent_style = 'twentynineteen-style';
    
    wp_register_style( 'jquery-ui-style', 
        get_stylesheet_directory_uri() . '/css/jquery-ui.min.css', false, 0.1 ); 
    wp_enqueue_style( 'jquery-ui-style' );      
    wp_register_script( 'jqery-ui-script', 
        get_stylesheet_directory_uri() . '/js/jquery-ui.min.js', array('jquery'), false, true );
    wp_enqueue_script( 'jqery-ui-script' ); 
    wp_enqueue_style( $parent_style, get_template_directory_uri() . '/style.css' );
    wp_enqueue_style( 'twentynineteen-child-style',
        get_stylesheet_directory_uri() . '/css/style.css',
        array( $parent_style ),
        wp_get_theme()->get('Version')
    );
}

/**
 * Disable the emoji's
 * from https://wordpress.org/plugins/disable-emojis/
 */
function disable_emojis() {
    remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
    remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
    remove_action( 'wp_print_styles', 'print_emoji_styles' );
    remove_action( 'admin_print_styles', 'print_emoji_styles' );
    remove_filter( 'the_content_feed', 'wp_staticize_emoji' );
    remove_filter( 'comment_text_rss', 'wp_staticize_emoji' );
    remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );
    add_filter( 'tiny_mce_plugins', 'disable_emojis_tinymce' );
    add_filter( 'wp_resource_hints', 'disable_emojis_remove_dns_prefetch', 10, 2 );
}
add_action( 'init', 'disable_emojis' );

/**
 * Filter function used to remove the tinymce emoji plugin.
 * 
 * @param    array  $plugins  
 * @return   array  Difference betwen the two arrays
 */
function disable_emojis_tinymce( $plugins ) {
    if ( is_array( $plugins ) ) {
        return array_diff( $plugins, array( 'wpemoji' ) );
    } else {
        return array();
    }
}


/**
 * Remove emoji CDN hostname from DNS prefetching hints.
 *
 * @param  array  $urls          URLs to print for resource hints.
 * @param  string $relation_type The relation type the URLs are printed for.
 * @return array                 Difference betwen the two arrays.
 */
function disable_emojis_remove_dns_prefetch( $urls, $relation_type ) {

    if ( 'dns-prefetch' == $relation_type ) {

        // Strip out any URLs referencing the WordPress.org emoji location
        $emoji_svg_url_bit = 'https://s.w.org/images/core/emoji/';
        foreach ( $urls as $key => $url ) {
            if ( strpos( $url, $emoji_svg_url_bit ) !== false ) {
                unset( $urls[$key] );
            }
        }

    }

    return $urls;
}