function do_embed_lazy($html = '')
{
if (is_exit() || empty($html)) {
return $html;
}
$patern_ifr = '/<\\s*iframe\\s+(?<attr>[^>]*)/i';
if (preg_match($patern_ifr, $html, $ifr)) {
$attr_arr = parse_attr($ifr['attr']);
if (!$attr_arr || empty($attr_arr['src']) || LAZY_PLACEHOLDER === $attr_arr['src'] || !empty($attr_arr['data-src'])) {
return $html;
}
if (array_key_exists('class', $attr_arr)) {
$attr_arr['class'] = do_class($attr_arr['class']);
} else {
$attr_arr['class'] = LAZY_CLASS;
}
$attr_arr['data-src'] = $attr_arr['src'];
$attr_arr['src'] = LAZY_PLACEHOLDER;
$html = str_replace($ifr['attr'], trim(attributes_to_string($attr_arr)), $html);
get_assets();
}
return $html;
}
function get_picture_tag($image_id, $default_size, array $responsive_sizes = null, array $options = [])
{
// short-cirtcuit for animated gifs
if (!empty($options['animated-gifs'])) {
if (\get_post_mime_type($image_id) === 'image/gif') {
$default_size = 'full';
$responsive_sizes = null;
}
}
$default_size = (array) $default_size;
// get image url
$default_url = get_image_url($image_id, $default_size[0]);
// exit early
if (!$default_url) {
return '';
}
// data string
$data_string = '';
$data = [];
if (!empty($options['data_size'])) {
$img_src = get_image_source($image_id, $default_size[0]);
if (!empty($img_src[0]) && !empty($img_src[1]) && !empty($img_src[2])) {
$data['width'] = $img_src[1];
$data['height'] = $img_src[2];
}
}
$data_string = attributes_to_string($data, 'data-');
// form the picture tag
$result = '<picture';
if (!empty($options['class'])) {
$result .= ' class="' . implode(' ', (array) $options['class']) . '"';
}
$result .= $data_string;
$result .= '>';
if (!empty($responsive_sizes)) {
foreach ($responsive_sizes as $r) {
if (empty($r['image'])) {
$r['image'] = $image_id;
}
$size = (array) $r['size'];
$result .= '<source srcset="' . get_image_url($r['image'], $size[0]);
if (count($size) > 1) {
$result .= ', ' . get_image_url($r['image'], $size[1]) . ' 2x"';
}
$result .= ' media="(' . trim(trim($r['rule'], ')'), '(') . ')">';
}
}
// default image
if (count($default_size) > 1) {
$result .= '<img srcset="' . $default_url . ', ' . get_image_url($image_id, $default_size[1]) . ' 2x"';
} else {
$result .= '<img src="' . $default_url . '"';
}
//the alt
if (empty($options['no_alt'])) {
$result .= ' alt="' . esc_attr(get_image_alt($image_id, true)) . '"';
}
$result .= '>';
// close picture tag
$result .= '</picture>';
return $result;
}
