module.php
97 lines
| 1 | <?php |
| 2 | namespace Elementor\Modules\LazyLoad; |
| 3 | |
| 4 | use Elementor\Core\Base\Module as BaseModule; |
| 5 | use Elementor\Plugin; |
| 6 | |
| 7 | if ( ! defined( 'ABSPATH' ) ) { |
| 8 | exit; // Exit if accessed directly |
| 9 | } |
| 10 | |
| 11 | class Module extends BaseModule { |
| 12 | |
| 13 | public function get_name() { |
| 14 | return 'lazyload'; |
| 15 | } |
| 16 | |
| 17 | public function __construct() { |
| 18 | parent::__construct(); |
| 19 | |
| 20 | add_action( 'init', [ $this, 'init' ] ); |
| 21 | } |
| 22 | |
| 23 | public function init() { |
| 24 | if ( ! $this->is_lazy_load_background_images_enabled() ) { |
| 25 | return; |
| 26 | } |
| 27 | |
| 28 | add_action( 'wp_head', function() { |
| 29 | if ( ! $this->should_lazyload() ) { |
| 30 | return; |
| 31 | } |
| 32 | ?> |
| 33 | <style> |
| 34 | .e-con.e-parent:nth-of-type(n+4):not(.e-lazyloaded):not(.e-no-lazyload), |
| 35 | .e-con.e-parent:nth-of-type(n+4):not(.e-lazyloaded):not(.e-no-lazyload) * { |
| 36 | background-image: none !important; |
| 37 | } |
| 38 | @media screen and (max-height: 1024px) { |
| 39 | .e-con.e-parent:nth-of-type(n+3):not(.e-lazyloaded):not(.e-no-lazyload), |
| 40 | .e-con.e-parent:nth-of-type(n+3):not(.e-lazyloaded):not(.e-no-lazyload) * { |
| 41 | background-image: none !important; |
| 42 | } |
| 43 | } |
| 44 | @media screen and (max-height: 640px) { |
| 45 | .e-con.e-parent:nth-of-type(n+2):not(.e-lazyloaded):not(.e-no-lazyload), |
| 46 | .e-con.e-parent:nth-of-type(n+2):not(.e-lazyloaded):not(.e-no-lazyload) * { |
| 47 | background-image: none !important; |
| 48 | } |
| 49 | } |
| 50 | </style> |
| 51 | <?php |
| 52 | } ); |
| 53 | |
| 54 | add_action( 'wp_footer', function() { |
| 55 | if ( ! $this->should_lazyload() ) { |
| 56 | return; |
| 57 | } |
| 58 | ?> |
| 59 | <script type='text/javascript'> |
| 60 | const lazyloadRunObserver = () => { |
| 61 | const lazyloadBackgrounds = document.querySelectorAll( `.e-con.e-parent:not(.e-lazyloaded)` ); |
| 62 | const lazyloadBackgroundObserver = new IntersectionObserver( ( entries ) => { |
| 63 | entries.forEach( ( entry ) => { |
| 64 | if ( entry.isIntersecting ) { |
| 65 | let lazyloadBackground = entry.target; |
| 66 | if( lazyloadBackground ) { |
| 67 | lazyloadBackground.classList.add( 'e-lazyloaded' ); |
| 68 | } |
| 69 | lazyloadBackgroundObserver.unobserve( entry.target ); |
| 70 | } |
| 71 | }); |
| 72 | }, { rootMargin: '200px 0px 200px 0px' } ); |
| 73 | lazyloadBackgrounds.forEach( ( lazyloadBackground ) => { |
| 74 | lazyloadBackgroundObserver.observe( lazyloadBackground ); |
| 75 | } ); |
| 76 | }; |
| 77 | const events = [ |
| 78 | 'DOMContentLoaded', |
| 79 | 'elementor/lazyload/observe', |
| 80 | ]; |
| 81 | events.forEach( ( event ) => { |
| 82 | document.addEventListener( event, lazyloadRunObserver ); |
| 83 | } ); |
| 84 | </script> |
| 85 | <?php |
| 86 | } ); |
| 87 | } |
| 88 | |
| 89 | private function should_lazyload() { |
| 90 | return ! is_admin() && ! Plugin::$instance->preview->is_preview_mode() && ! Plugin::$instance->editor->is_edit_mode(); |
| 91 | } |
| 92 | |
| 93 | private static function is_lazy_load_background_images_enabled(): bool { |
| 94 | return '1' === get_option( 'elementor_lazy_load_background_images', '1' ); |
| 95 | } |
| 96 | } |
| 97 |