WordPress enhancements

cssllc-enhancements.php

<?php
/**
 * Description: WordPress enhancements from CSSLLC.
 * Author URI: https://develop.calebstauffer.com
 * Author: Caleb Stauffer
 * Plugin URI: https://gist.github.com/crstauf/68b4d37ebdc0423d2275bce49527a2f4
 */

/**
 * Action: wp_enqueue_scripts
 *
 * - prevent emoji scripts and styles
 */
add_action( 'wp_enqueue_scripts', function() {
	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' );
} );

/**
 * Filter: body_class
 *
 * - add post thumbnail classes
 *
 * @param array $classes
 * @uses has_post_thumbnail()
 * @uses get_post_thumbnail_id()
 * @return array
 */
add_filter( 'body_class', function( $classes ) {
	if ( has_post_thumbnail() ) {
		$classes[] = 'has-post-thumbnail';
		$classes[] = 'post-thumbnail-' . get_post_thumbnail_id();
	}
	
	return $classes;
} );

/**
 * Filter: post_class
 *
 * - add post thumbnail id class
 *
 * @param array $classes
 * @param array $class
 * @param int $post_id
 * @uses has_post_thumbnail()
 * @uses get_post_thumbnail_id()
 * @return array
 */
add_filter( 'post_class', function( $classes, $class, $post_id ) {
	if ( has_post_thumbnail( $post_id ) )
		$classes[] = 'post-thumbnail-' . get_post_thumbnail_id( $post_id );
		
	return $classes;
}, 10, 3 );

/**
 * Action: wp_print_footer_scripts
 *
 * - add "Empty Link" badge to empty links
 */
add_action( 'wp_print_footer_scripts', function() {
	if ( !current_user_can( 'edit_post', get_queried_object_id() ) )
		return;
	?>
	
	<style type="text/css">
		html { counter-reset: empty-links; }
		
		a[href=""],
		a[href="#"],
		a[href*="google.com"],
		a[href*="javascript"] {
			position: relative;
			counter-increment: empty-links;
		}

		a[href=""]::before,
		a[href="#"]::before,
		a[href*="google.com"]::before,
		a[href*="javascript"]::before {
			content: 'Empty link';
			position: absolute;
			left: 0;
			top: 0;
			z-index: 2;
			padding: 8px 15px;
			background-color: #f00;
			transform: rotate( -20deg ) translate( -10%, -10% );
			text-transform: uppercase;
			font-family: sans-serif;
			pointer-events: none;
			white-space: nowrap;
			letter-spacing: 2px;
			font-weight: 600;
			font-size: 9px !important;
			color: #FFF;
			opacity: 1;

			-webkit-transition: opacity 0.2s;
			        transition: opacity 0.2s;

			-webkit-box-shadow: 2px 2px 5px 0px rgba( 0, 0, 0, 0.5 );
			   -moz-box-shadow: 2px 2px 5px 0px rgba( 0, 0, 0, 0.5 );
			        box-shadow: 2px 2px 5px 0px rgba( 0, 0, 0, 0.5 );
		}

			a[href=""]:hover::before,
			a[href="#"]:hover::before,
			a[href*="google.com"]:hover::before,
			a[href*="javascript"]:hover::before {
				opacity: 0;
			}
	</style>
	
	<?php
} );