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Use od_finish_template_optimization action to insert video lazy-load script #1922

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Use od_finish_template_optimization action to insert video lazy-load script #1922

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25 changes: 18 additions & 7 deletions plugins/image-prioritizer/class-image-prioritizer-video-tag-visitor.php
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Original file line number Diff line number Diff line change
Expand Up @@ -31,12 +31,12 @@ final class Image_Prioritizer_Video_Tag_Visitor extends Image_Prioritizer_Tag_Vi
const LAZY_VIDEO_CLASS_NAME = 'od-lazy-video';

/**
* Whether the lazy-loading script was added to the body.
* Count of lazy-loaded videos on the page.
*
* @since 0.2.0
* @var bool
* @since n.e.x.t
* @var int
*/
protected $added_lazy_script = false;
protected $lazy_loaded_video_count = 0;

/**
* Visits a tag.
Expand Down Expand Up @@ -240,9 +240,20 @@ private function lazy_load_videos( ?string $poster, OD_Tag_Visitor_Context $cont
$processor->add_class( self::LAZY_VIDEO_CLASS_NAME );
}

if ( ! $this->added_lazy_script ) {
$processor->append_body_html( wp_get_inline_script_tag( image_prioritizer_get_video_lazy_load_script(), array( 'type' => 'module' ) ) );
$this->added_lazy_script = true;
++$this->lazy_loaded_video_count;
}

/**
* Inserts lazy-load script if needed.
*
* @since n.e.x.t
*
* @param OD_Template_Optimization_Context $context Template optimization context.
*/
public function insert_lazy_load_script_if_needed( OD_Template_Optimization_Context $context ): void {
if ( $this->lazy_loaded_video_count > 0 ) {
$script = wp_get_inline_script_tag( image_prioritizer_get_video_lazy_load_script(), array( 'type' => 'module' ) );
$context->append_body_html( $script );
}
}
}
1 change: 1 addition & 0 deletions plugins/image-prioritizer/helper.php
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Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,7 @@ function image_prioritizer_register_tag_visitors( OD_Tag_Visitor_Registry $regis

$video_visitor = new Image_Prioritizer_Video_Tag_Visitor();
$registry->register( 'image-prioritizer/video', $video_visitor );
add_action( 'od_finish_template_optimization', array( $video_visitor, 'insert_lazy_load_script_if_needed' ) );
}

/**
Expand Down