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<?php
/**
* Tweak the preview when rendered in an iframe
*/
class Jetpack_Iframe_Embed {
static function init() {
if ( ! self::is_embedding_in_iframe() ) {
return;
}
// Disable the admin bar
if ( ! defined( 'IFRAME_REQUEST' ) ) {
define( 'IFRAME_REQUEST', true );
}
// Prevent canonical redirects
remove_filter( 'template_redirect', 'redirect_canonical' );
add_action( 'wp_head', array( 'Jetpack_Iframe_Embed', 'noindex' ), 1 );
add_action( 'wp_head', array( 'Jetpack_Iframe_Embed', 'base_target_blank' ), 1 );
add_filter( 'shortcode_atts_video', array( 'Jetpack_Iframe_Embed', 'disable_autoplay' ) );
add_filter( 'shortcode_atts_audio', array( 'Jetpack_Iframe_Embed', 'disable_autoplay' ) );
if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
wp_enqueue_script( 'jetpack-iframe-embed', WPMU_PLUGIN_URL . '/jetpack-iframe-embed/jetpack-iframe-embed.js', array( 'jquery' ) );
} else {
$ver = sprintf( '%s-%s', gmdate( 'oW' ), defined( 'JETPACK__VERSION' ) ? JETPACK__VERSION : '' );
wp_enqueue_script( 'jetpack-iframe-embed', '//s0.wp.com/wp-content/mu-plugins/jetpack-iframe-embed/jetpack-iframe-embed.js', array( 'jquery' ), $ver );
}
wp_localize_script( 'jetpack-iframe-embed', '_previewSite', array( 'siteURL' => get_site_url() ) );
}
static function is_embedding_in_iframe() {
return (
self::has_iframe_get_param() && (
self::has_preview_get_param() ||
self::has_preview_theme_preview_param()
)
);
}
private static function has_iframe_get_param() {
return isset( $_GET['iframe'] ) && $_GET['iframe'] === 'true';
}
private static function has_preview_get_param() {
return isset( $_GET['preview'] ) && $_GET['preview'] === 'true';
}
private static function has_preview_theme_preview_param() {
return isset( $_GET['theme_preview'] ) && $_GET['theme_preview'] === 'true';
}
/**
* Disable `autoplay` shortcode attribute in context of an iframe
* Added via `shortcode_atts_video` & `shortcode_atts_audio` in `init`
*
* @param array $atts The output array of shortcode attributes.
*
* @return array The output array of shortcode attributes.
*/
static function disable_autoplay( $atts ) {
return array_merge( $atts, array( 'autoplay' => false ) );
}
/**
* We don't want search engines to index iframe previews
* Added via `wp_head` action in `init`
*/
static function noindex() {
echo '<meta name="robots" content="noindex,nofollow" />';
}
/**
* Make sure all links and forms open in a new window by default
* (unless overridden on client-side by JS)
* Added via `wp_head` action in `init`
*/
static function base_target_blank() {
echo '<base target="_blank" />';
}
}
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