104 lines
3.1 KiB
PHP
104 lines
3.1 KiB
PHP
<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
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/**
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* Tweak a preview when rendered in an iframe.
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* This is used when rendering iFrames in the Calypso app.
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*
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* This file is shared between WordPress.com and Jetpack.
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* The canonical source is Jetpack and no WordPress.com-specific code should exist in this file.
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*
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* @package automattic/jetpack
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*/
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/**
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* Tweak a preview when rendered in an iframe.
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*/
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class Jetpack_Iframe_Embed {
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/**
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* Initialize class.
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*/
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public static function init() {
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if ( ! self::is_embedding_in_iframe() ) {
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return;
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}
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// Disable the admin bar.
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if ( ! defined( 'IFRAME_REQUEST' ) ) {
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define( 'IFRAME_REQUEST', true );
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}
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// Prevent canonical redirects.
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remove_filter( 'template_redirect', 'redirect_canonical' );
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add_action( 'wp_head', array( 'Jetpack_Iframe_Embed', 'noindex' ), 1 );
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add_action( 'wp_head', array( 'Jetpack_Iframe_Embed', 'base_target_blank' ), 1 );
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add_filter( 'shortcode_atts_video', array( 'Jetpack_Iframe_Embed', 'disable_autoplay' ) );
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add_filter( 'shortcode_atts_audio', array( 'Jetpack_Iframe_Embed', 'disable_autoplay' ) );
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$ver = sprintf( '%s-%s', gmdate( 'oW' ), defined( 'JETPACK__VERSION' ) ? JETPACK__VERSION : '' );
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if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
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wp_enqueue_script(
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'jetpack-iframe-embed',
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'/wp-content/mu-plugins/jetpack-iframe-embed/jetpack-iframe-embed.js',
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array( 'jquery' ),
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$ver,
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false
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);
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} else {
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wp_enqueue_script(
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'jetpack-iframe-embed',
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'//s0.wp.com/wp-content/mu-plugins/jetpack-iframe-embed/jetpack-iframe-embed.js',
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array( 'jquery' ),
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$ver,
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false
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);
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}
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wp_localize_script( 'jetpack-iframe-embed', '_previewSite', array( 'siteURL' => get_site_url() ) );
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}
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/**
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* Check that we are in an iFrame.
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*
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* @return bool
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*/
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private static function is_embedding_in_iframe() {
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return (
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// phpcs:disable WordPress.Security.NonceVerification.Recommended -- No nonce needed, we're only checking for a specific screen view.
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isset( $_GET['iframe'] ) && 'true' === $_GET['iframe']
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&& (
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isset( $_GET['preview'] ) && 'true' === $_GET['preview']
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|| isset( $_GET['theme_preview'] ) && 'true' === $_GET['theme_preview']
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)
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// phpcs:enable WordPress.Security.NonceVerification.Recommended
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);
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}
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/**
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* Disable `autoplay` shortcode attribute in context of an iframe
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* Added via `shortcode_atts_video` & `shortcode_atts_audio` in `init`
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*
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* @param array $atts The output array of shortcode attributes.
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*
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* @return array The output array of shortcode attributes.
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*/
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public static function disable_autoplay( $atts ) {
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return array_merge( $atts, array( 'autoplay' => false ) );
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}
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/**
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* We don't want search engines to index iframe previews
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* Added via `wp_head` action in `init`
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*/
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public static function noindex() {
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echo '<meta name="robots" content="noindex,nofollow" />';
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}
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/**
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* Make sure all links and forms open in a new window by default
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* (unless overridden on client-side by JS)
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* Added via `wp_head` action in `init`
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*/
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public static function base_target_blank() {
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echo '<base target="_blank" />';
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}
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}
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