* Add filter to a3 lazy load to add skip class no-lazyload

* Add filter to rocket_async_css_process_responsive_image to add no-lazyload class if we are processing a slider
* Add filter to do_shortcode_tag to add no-lazyload to all class attributes in the slider

Author: pcfreak30

lib/Rocket/Async/CSS/Integration/RevolutionSlider.php

@@ -28,6 +28,9 @@ public function init() {
 			add_filter( 'rocket_async_css_lazy_load_responsive_image', [ $this, 'check_image' ], 10, 4 );
 			add_action( 'revslider_modify_core_settings', [ $this, 'in_slider' ] );
 			add_filter( 'revslider_add_js_delay', [ $this, 'out_slider' ], 10, 2 );
+			add_filter( 'a3_lazy_load_skip_images_classes', [ $this, 'skip_class' ] );
+			add_filter( 'rocket_async_css_process_responsive_image', [ $this, 'block_image' ] );
+			add_filter( 'do_shortcode_tag', [ $this, 'post_process_shortcode' ], 10, 2 );
 		}
 	}
 
@@ -75,4 +78,32 @@ public function out_slider( $value ) {
 
 		return $value;
 	}
-}
+
+	public function skip_class( $classes ) {
+		$classes   = array_map( 'trim', explode( ',', $classes ) );
+		$classes[] = 'no-lazyload';
+		$classes   = array_unique( array_filter( $classes ) );
+		$classes   = implode( ',', $classes );
+		return $classes;
+	}
+
+	public function block_image( $value ) {
+		if ( $this->in_slider ) {
+			if ( false === strpos( $value, 'no-lazyload' ) ) {
+				$value = str_replace( 'class="', 'class="no-lazyload ', $value );
+				$value = str_replace( "class='", "class='no-lazyload ", $value );
+			}
+		}
+		return $value;
+	}
+
+	public function post_process_shortcode( $value, $tag ) {
+		if ( 'rev_slider' === $tag ) {
+			if ( false === strpos( $value, 'no-lazyload' ) ) {
+				$value = str_replace( 'class="', 'class="no-lazyload ', $value );
+				$value = str_replace( "class='", "class='no-lazyload ", $value );
+			}
+		}
+		return $value;
+	}
+}