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class.jetpack-iframe-embed.php
105 lines
| 1 | <?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName |
| 2 | /** |
| 3 | * Tweak a preview when rendered in an iframe. |
| 4 | * This is used when rendering iFrames in the Calypso app. |
| 5 | * |
| 6 | * This file is shared between WordPress.com and Jetpack. |
| 7 | * The canonical source is Jetpack and no WordPress.com-specific code should exist in this file. |
| 8 | * |
| 9 | * @package automattic/jetpack |
| 10 | */ |
| 11 | |
| 12 | /** |
| 13 | * Tweak a preview when rendered in an iframe. |
| 14 | */ |
| 15 | class Jetpack_Iframe_Embed { |
| 16 | /** |
| 17 | * Initialize class. |
| 18 | */ |
| 19 | public static function init() { |
| 20 | if ( ! self::is_embedding_in_iframe() ) { |
| 21 | return; |
| 22 | } |
| 23 | |
| 24 | // Disable the admin bar. |
| 25 | if ( ! defined( 'IFRAME_REQUEST' ) ) { |
| 26 | define( 'IFRAME_REQUEST', true ); |
| 27 | } |
| 28 | |
| 29 | // Prevent canonical redirects. |
| 30 | remove_filter( 'template_redirect', 'redirect_canonical' ); |
| 31 | |
| 32 | add_action( 'wp_head', array( 'Jetpack_Iframe_Embed', 'noindex' ), 1 ); |
| 33 | add_action( 'wp_head', array( 'Jetpack_Iframe_Embed', 'base_target_blank' ), 1 ); |
| 34 | |
| 35 | add_filter( 'shortcode_atts_video', array( 'Jetpack_Iframe_Embed', 'disable_autoplay' ) ); |
| 36 | add_filter( 'shortcode_atts_audio', array( 'Jetpack_Iframe_Embed', 'disable_autoplay' ) ); |
| 37 | |
| 38 | $ver = sprintf( '%s-%s', gmdate( 'oW' ), defined( 'JETPACK__VERSION' ) ? JETPACK__VERSION : '' ); |
| 39 | if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) { |
| 40 | wp_enqueue_script( |
| 41 | 'jetpack-iframe-embed', |
| 42 | '/wp-content/mu-plugins/jetpack-iframe-embed/jetpack-iframe-embed.js', |
| 43 | array( 'jquery' ), |
| 44 | $ver, |
| 45 | false |
| 46 | ); |
| 47 | } else { |
| 48 | wp_enqueue_script( |
| 49 | 'jetpack-iframe-embed', |
| 50 | '//s0.wp.com/wp-content/mu-plugins/jetpack-iframe-embed/jetpack-iframe-embed.js', |
| 51 | array( 'jquery' ), |
| 52 | $ver, |
| 53 | false |
| 54 | ); |
| 55 | } |
| 56 | wp_localize_script( 'jetpack-iframe-embed', '_previewSite', array( 'siteURL' => get_site_url() ) ); |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * Check that we are in an iFrame. |
| 61 | * |
| 62 | * @return bool |
| 63 | */ |
| 64 | private static function is_embedding_in_iframe() { |
| 65 | return ( |
| 66 | // phpcs:disable WordPress.Security.NonceVerification.Recommended -- No nonce needed, we're only checking for a specific screen view. |
| 67 | isset( $_GET['iframe'] ) && 'true' === $_GET['iframe'] |
| 68 | && ( |
| 69 | isset( $_GET['preview'] ) && 'true' === $_GET['preview'] |
| 70 | || isset( $_GET['theme_preview'] ) && 'true' === $_GET['theme_preview'] |
| 71 | ) |
| 72 | // phpcs:enable WordPress.Security.NonceVerification.Recommended |
| 73 | ); |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Disable `autoplay` shortcode attribute in context of an iframe |
| 78 | * Added via `shortcode_atts_video` & `shortcode_atts_audio` in `init` |
| 79 | * |
| 80 | * @param array $atts The output array of shortcode attributes. |
| 81 | * |
| 82 | * @return array The output array of shortcode attributes. |
| 83 | */ |
| 84 | public static function disable_autoplay( $atts ) { |
| 85 | return array_merge( $atts, array( 'autoplay' => false ) ); |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * We don't want search engines to index iframe previews |
| 90 | * Added via `wp_head` action in `init` |
| 91 | */ |
| 92 | public static function noindex() { |
| 93 | echo '<meta name="robots" content="noindex,nofollow" />'; |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Make sure all links and forms open in a new window by default |
| 98 | * (unless overridden on client-side by JS) |
| 99 | * Added via `wp_head` action in `init` |
| 100 | */ |
| 101 | public static function base_target_blank() { |
| 102 | echo '<base target="_blank" />'; |
| 103 | } |
| 104 | } |
| 105 |