*
* @copyright (c) 2018, Incsub (http://incsub.com)
*/
if ( ! defined( 'WPINC' ) ) {
die;
}
/**
* Class WP_Smush_Auto_Resize
*/
class WP_Smush_Auto_Resize extends WP_Smush_Content {
/**
* Is auto detection enabled.
*
* @var bool
*/
private $can_auto_detect = false;
/**
* WP_Smush_Auto_Resize constructor.
*/
public function init() {
// Set auto resize flag.
add_action( 'wp', array( $this, 'init_flags' ) );
// Load js file that is required in public facing pages.
add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_resize_assets' ) );
// Set a flag to media library images.
add_action( 'smush_cdn_image_tag', array( $this, 'skip_image_resize_detection' ) );
// Generate markup for the template engine.
add_action( 'wp_footer', array( $this, 'generate_markup' ) );
}
/**
* Check if auto resize can be performed.
*
* Allow only if current user is admin and auto resize
* detection is enabled in settings.
*/
public function init_flags() {
// Only required for admin users.
if ( $this->settings->get( 'detection' ) && current_user_can( 'manage_options' ) ) {
$this->can_auto_detect = true;
}
}
/**
* Enqueque JS files required in public pages.
*
* Enque resize detection js and css files to public
* facing side of the site. Load only if auto detect
* is enabled.
*
* @return void
*/
public function enqueue_resize_assets() {
// Required only if auto detection is required.
if ( ! $this->can_auto_detect ) {
return;
}
// Required scripts for front end.
wp_enqueue_script(
'smush-resize-detection',
WP_SMUSH_URL . 'app/assets/js/smush-rd.min.js',
array( 'jquery' ),
WP_SMUSH_VERSION,
true
);
// Required styles for front end.
wp_enqueue_style(
'smush-resize-detection',
WP_SMUSH_URL . 'app/assets/css/smush-rd.min.css',
array(),
WP_SMUSH_VERSION
);
// Define ajaxurl var.
wp_localize_script(
'smush-resize-detection',
'wp_smush_resize_vars',
array(
'ajaxurl' => admin_url( 'admin-ajax.php' ),
'ajax_nonce' => wp_create_nonce( 'smush_resize_nonce' ),
// translators: %s - width, %s - height.
'large_image' => sprintf( __( 'This image is too large for its container. Adjust the image dimensions to %1$s x %2$spx for optimal results.', 'wp-smushit' ), 'width', 'height' ),
// translators: %s - width, %s - height.
'small_image' => sprintf( __( 'This image is too small for its container. Adjust the image dimensions to %1$s x %2$spx for optimal results.', 'wp-smushit' ), 'width', 'height' ),
)
);
}
/**
* Generate markup for the template engine.
*
* @since 2.9
*/
public function generate_markup() {
// Required only if auto detection is required.
if ( ! $this->can_auto_detect ) {
return;
}
?>
can_auto_detect ) {
return $image;
}
// CDN with auto resize need to be enabled.
if ( ! $this->settings->get( 'cdn' ) || ! $this->settings->get( 'auto_resize' ) ) {
return $image;
}
$this->add_attribute( $image, 'data-resize-detection', '0' );
return $image;
}
}