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<?php
/**
* Integration with Envira Gallery
*
* @since 3.3.0
* @package Smush\Core\Integrations
*/
namespace Smush\Core\Integrations;
use Smush\Core\Modules\CDN;
use Smush\Core\Modules\Helpers\Parser;
use Smush\Core\Settings;
if ( ! defined( 'WPINC' ) ) {
die;
}
/**
* Class Envira
*/
class Envira {
/**
* CDN module instance.
*
* @var CDN $cdn
*/
private $cdn;
/**
* Envira constructor.
*
* @since 3.3.0
*
* @param CDN $cdn CDN module.
*/
public function __construct( CDN $cdn ) {
if ( is_admin() ) {
return;
}
$settings = Settings::get_instance();
if ( $settings->get( 'lazy_load' ) ) {
add_filter( 'smush_skip_image_from_lazy_load', array( $this, 'skip_lazy_load' ), 10, 3 );
add_filter( 'envira_gallery_indexable_images', array( $this, 'add_no_lazyload_class' ) );
}
if ( $settings->get( 'cdn' ) ) {
$this->cdn = $cdn;
add_filter( 'smush_cdn_image_tag', array( $this, 'replace_cdn_links' ) );
}
}
/**
* Do not lazy load images from Envira Gallery.
*
* @since 3.3.0
*
* @param bool $lazy_load Should skip? Default: false.
* @param string $src Image url.
* @param string $img Image.
*
* @return bool
*/
public function skip_lazy_load( $lazy_load, $src, $img ) {
$classes = Parser::get_attribute( $img, 'class' );
return false !== strpos( $classes, 'envira-lazy' );
}
/**
* Replace images from data-envira-src and data-envira-srcset with CDN links.
*
* @since 3.3.0
*
* @param string $img Image.
*
* @return string
*/
public function replace_cdn_links( $img ) {
$image_src = Parser::get_attribute( $img, 'data-envira-src' );
if ( $image_src ) {
// Store the original source to be used later on.
$original_src = $image_src;
// Replace the data-envira-src of the image with CDN link.
$image_src = $this->convert_url_to_cdn( $image_src );
if ( $image_src ) {
$img = preg_replace( '#(data-envira-src=["|\'])' . $original_src . '(["|\'])#i', '\1' . $image_src . '\2', $img, 1 );
}
}
$image_srcset = Parser::get_attribute( $img, 'data-envira-srcset' );
if ( $image_srcset ) {
// Do not add our own srcset attributes.
add_filter( 'smush_skip_adding_srcset', '__return_true' );
// Store the original source to be used later on.
$original_src = $image_srcset;
$replace = false;
$images = Parser::get_links_from_content( $image_srcset );
if ( isset( $images[0] ) && is_array( $images[0] ) ) {
foreach ( $images[0] as $image ) {
// Replace the data-envira-srcset of the image with CDN link.
$image_src = $this->convert_url_to_cdn( $image );
if ( $image_src ) {
$replace = true;
$image_srcset = preg_replace( '#' . $image . '#i', '\1' . $image_src . '\2', $image_srcset, 1 );
}
}
}
if ( $replace ) {
$img = preg_replace( '#(data-envira-srcset=["|\'])' . $original_src . '(["|\'])#i', '\1' . $image_srcset . '\2', $img, 1 );
}
}
return $img;
}
/**
* Galleries in Envira will use a noscript tag with images. Smush can't filter the DOM tree, so we will add
* a no-lazyload class to every image.
*
* @since 3.5.0
*
* @param string $images String of img tags that will go inside nocscript element.
*
* @return string
*/
public function add_no_lazyload_class( $images ) {
$parsed = ( new Parser() )->get_images_from_content( $images );
if ( empty( $parsed ) ) {
return $images;
}
foreach ( $parsed[0] as $image ) {
$original = $image;
$class = Parser::get_attribute( $image, 'class' );
if ( ! $class ) {
Parser::add_attribute( $image, 'class', 'no-lazyload' );
} else {
Parser::add_attribute( $image, 'class', $class . ' no-lazyload' );
}
$images = str_replace( $original, $image, $images );
}
return $images;
}
/**
* Convert URL to CDN link.
*
* @since 3.3.0
*
* @param string $url Image URL.
*
* @return bool|string
*/
private function convert_url_to_cdn( $url ) {
if ( ! $this->cdn->is_supported_path( $url ) ) {
return false;
}
return $this->cdn->generate_cdn_url( $url );
}
}
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