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<?php
/**
* @author : Jegtheme
*/
namespace JNews\Image;
/**
* Class JNews Image
*/
Class ImageLazyLoad implements ImageInterface {
/**
* @var ImageLazyLoad
*/
private static $instance;
private $expand_range = 700;
/**
* @return ImageLazyLoad
*/
public static function getInstance() {
if ( null === static::$instance ) {
static::$instance = new static();
}
return static::$instance;
}
/**
* @param $id
* @param $size
*
* @return string
*/
public function single_image_unwrap( $id, $size ) {
add_filter( 'wp_get_attachment_image_attributes', array( $this, 'lazy_load_image' ), 10, 2 );
$image_size = wp_get_attachment_image_src( $id, $size );
$image = get_post( $id );
$percentage = round( $image_size[2] / $image_size[1] * 100, 3 );
$thumbnail = "<div class=\"thumbnail-container animate-lazy\" style=\"padding-bottom:" . $percentage . "%\">";
$thumbnail .= wp_get_attachment_image( $id, $size );
$thumbnail .= "</div>";
if ( ! empty( $image->post_excerpt ) ) {
$thumbnail .= "<p class=\"wp-caption-text\">" . $image->post_excerpt . "</p>";
}
jnews_remove_filters( 'wp_get_attachment_image_attributes', array( $this, 'lazy_load_image' ), 10 );
return $thumbnail;
}
/**
* @param $id
* @param $size
*
* @return string
*/
public function image_thumbnail_unwrap( $id, $size ) {
add_filter( 'wp_get_attachment_image_attributes', array( $this, 'lazy_load_image' ), 10, 2 );
$post_thumbnail_id = get_post_thumbnail_id( $id );
$image_size = wp_get_attachment_image_src( $post_thumbnail_id, $size );
$image = get_post( $post_thumbnail_id );
$percentage = ! empty( $image_size[1] ) ? round( $image_size[2] / $image_size[1] * 100, 3 ) : '';
$thumbnail = "<div class=\"thumbnail-container animate-lazy\" style=\"padding-bottom:" . $percentage . "%\">";
$thumbnail .= get_the_post_thumbnail( $id, $size );
$thumbnail .= "</div>";
if ( ! empty( $image->post_excerpt ) ) {
$thumbnail .= "<p class=\"wp-caption-text\">" . $image->post_excerpt . "</p>";
}
jnews_remove_filters( 'wp_get_attachment_image_attributes', array( $this, 'lazy_load_image' ), 10 );
return $thumbnail;
}
/**
* @param $id
* @param $size
*
* @return string
*/
public function image_thumbnail( $id, $size ) {
$image_size = Image::getInstance()->get_image_size( $size );
add_filter( 'wp_get_attachment_image_attributes', array( $this, 'lazy_load_image' ), 10, 2 );
$additional_class = '';
if ( ! has_post_thumbnail( $id ) ) {
$additional_class = 'no_thumbnail';
}
$thumbnail = "<div class=\"thumbnail-container animate-lazy {$additional_class} size-{$image_size['dimension']} \">";
$thumbnail .= get_the_post_thumbnail( $id, $size );
$thumbnail .= "</div>";
jnews_remove_filters( 'wp_get_attachment_image_attributes', array( $this, 'lazy_load_image' ), 10 );
return $thumbnail;
}
/**
* @param $id
* @param $size
*
* @return string
*/
public function owl_single_image( $id, $size ) {
$image_size = Image::getInstance()->get_image_size( $size );
$thumbnail = "<div class=\"thumbnail-container size-{$image_size['dimension']} \">";
$thumbnail .= wp_get_attachment_image( $id, $size );
$thumbnail .= "</div>";
return $thumbnail;
}
/**
* @param $id
* @param $size
*
* @return string
*/
public function owl_lazy_single_image( $id, $size ) {
$image_size = Image::getInstance()->get_image_size( $size );
add_filter( 'wp_get_attachment_image_attributes', array( $this, 'owl_lazy_attr' ), 10, 2 );
$thumbnail = "<div class=\"thumbnail-container size-{$image_size['dimension']} \">";
$thumbnail .= wp_get_attachment_image( $id, $size );
$thumbnail .= "</div>";
jnews_remove_filters( 'wp_get_attachment_image_attributes', array( $this, 'owl_lazy_attr' ), 10 );
return $thumbnail;
}
/**
* @param $id
* @param $size
*
* @return string
*/
public function owl_lazy_image( $id, $size ) {
$image_size = Image::getInstance()->get_image_size( $size );
add_filter( 'wp_get_attachment_image_attributes', array( $this, 'owl_lazy_attr' ), 10, 2 );
$thumbnail = "<div class=\"thumbnail-container size-{$image_size['dimension']} \">";
$thumbnail .= get_the_post_thumbnail( $id, $size );
$thumbnail .= "</div>";
jnews_remove_filters( 'wp_get_attachment_image_attributes', array( $this, 'owl_lazy_attr' ), 10 );
return $thumbnail;
}
/**
* @param $img_src
* @param $img_title
* @param $img_size
*
* @return string
*/
public function single_image( $img_src, $img_title, $img_size ) {
$img_tag = "<img class='lazyload' src='" . apply_filters( 'jnews_empty_image', '' ) . "' data-expand='" . $this->expand_range . "' alt='{$img_title}' data-src='{$img_src}' title='{$img_title}'>";
if ( $img_size ) {
return "<div class='thumbnail-container animate-lazy size-{$img_size}'>{$img_tag}</div>";
} else {
return $img_tag;
}
}
/**
* @param $attr
* @param $image
*
* @return mixed
*/
public function lazy_load_image( $attr, $image ) {
$attr['class'] = $attr['class'] . ' lazyload';
$attr['data-src'] = $attr['src'];
$attr['data-srcset'] = isset( $attr['srcset'] ) ? $attr['srcset'] : '';
$attr['data-sizes'] = 'auto';
$attr['data-expand'] = $this->expand_range;
$attr['src'] = apply_filters( 'jnews_empty_image', '' );
if ( empty( $attr['alt'] ) && ! empty( $image->post_parent ) ) {
$attr['alt'] = wp_strip_all_tags( get_the_title( $image->post_parent ) );
}
// Need to fix issues on ajax request image not showing
if ( wp_doing_ajax() ) {
$attr['data-animate'] = 0;
}
if ( get_theme_mod( 'jnews_disable_image_srcset', false ) ) {
$attr['class'] = 'lazyload';
unset( $attr['data-srcset'] );
unset( $attr['sizes'] );
}
unset( $attr['srcset'] );
return $attr;
}
/**
* @param $attr
* @param $image
*
* @return mixed
*/
public function owl_lazy_attr( $attr, $image ) {
$attr['class'] = $attr['class'] . ' owl-lazy lazyload';
$attr['data-src'] = $attr['src'];
$attr['src'] = apply_filters( 'jnews_empty_image', '' );
if ( empty( $attr['alt'] ) && ! empty( $image->post_parent ) ) {
$attr['alt'] = wp_strip_all_tags( get_the_title( $image->post_parent ) );
}
if ( get_theme_mod( 'jnews_disable_image_srcset', false ) ) {
$attr['class'] = 'owl-lazy lazyload';
unset( $attr['sizes'] );
}
unset( $attr['srcset'] );
return $attr;
}
}