| 1 |
<?php |
| 2 |
/** |
| 3 |
* Tweak the preview when rendered in an iframe |
| 4 |
*/ |
| 5 |
|
| 6 |
class Jetpack_Iframe_Embed { |
| 7 |
static function init() { |
| 8 |
if ( ! self::is_embedding_in_iframe() ) { |
| 9 |
return; |
| 10 |
} |
| 11 |
|
| 12 |
// Disable the admin bar |
| 13 |
if ( ! defined( 'IFRAME_REQUEST' ) ) { |
| 14 |
define( 'IFRAME_REQUEST', true ); |
| 15 |
} |
| 16 |
|
| 17 |
// Prevent canonical redirects |
| 18 |
remove_filter( 'template_redirect', 'redirect_canonical' ); |
| 19 |
|
| 20 |
add_action( 'wp_head', array( 'Jetpack_Iframe_Embed', 'noindex' ), 1 ); |
| 21 |
add_action( 'wp_head', array( 'Jetpack_Iframe_Embed', 'base_target_blank' ), 1 ); |
| 22 |
|
| 23 |
add_filter( 'shortcode_atts_video', array( 'Jetpack_Iframe_Embed', 'disable_autoplay' ) ); |
| 24 |
add_filter( 'shortcode_atts_audio', array( 'Jetpack_Iframe_Embed', 'disable_autoplay' ) ); |
| 25 |
|
| 26 |
if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) { |
| 27 |
wp_enqueue_script( 'jetpack-iframe-embed', WPMU_PLUGIN_URL . '/jetpack-iframe-embed/jetpack-iframe-embed.js', array( 'jquery' ) ); |
| 28 |
} else { |
| 29 |
$ver = sprintf( '%s-%s', gmdate( 'oW' ), defined( 'JETPACK__VERSION' ) ? JETPACK__VERSION : '' ); |
| 30 |
wp_enqueue_script( 'jetpack-iframe-embed', '//s0.wp.com/wp-content/mu-plugins/jetpack-iframe-embed/jetpack-iframe-embed.js', array( 'jquery' ), $ver ); |
| 31 |
} |
| 32 |
wp_localize_script( 'jetpack-iframe-embed', '_previewSite', array( 'siteURL' => get_site_url() ) ); |
| 33 |
} |
| 34 |
|
| 35 |
static function is_embedding_in_iframe() { |
| 36 |
return ( |
| 37 |
self::has_iframe_get_param() && ( |
| 38 |
self::has_preview_get_param() || |
| 39 |
self::has_preview_theme_preview_param() |
| 40 |
) |
| 41 |
); |
| 42 |
} |
| 43 |
|
| 44 |
private static function has_iframe_get_param() { |
| 45 |
return isset( $_GET['iframe'] ) && $_GET['iframe'] === 'true'; |
| 46 |
} |
| 47 |
|
| 48 |
private static function has_preview_get_param() { |
| 49 |
return isset( $_GET['preview'] ) && $_GET['preview'] === 'true'; |
| 50 |
} |
| 51 |
|
| 52 |
private static function has_preview_theme_preview_param() { |
| 53 |
return isset( $_GET['theme_preview'] ) && $_GET['theme_preview'] === 'true'; |
| 54 |
} |
| 55 |
|
| 56 |
/** |
| 57 |
* Disable `autoplay` shortcode attribute in context of an iframe |
| 58 |
* Added via `shortcode_atts_video` & `shortcode_atts_audio` in `init` |
| 59 |
* |
| 60 |
* @param array $atts The output array of shortcode attributes. |
| 61 |
* |
| 62 |
* @return array The output array of shortcode attributes. |
| 63 |
*/ |
| 64 |
static function disable_autoplay( $atts ) { |
| 65 |
return array_merge( $atts, array( 'autoplay' => false ) ); |
| 66 |
} |
| 67 |
|
| 68 |
/** |
| 69 |
* We don't want search engines to index iframe previews |
| 70 |
* Added via `wp_head` action in `init` |
| 71 |
*/ |
| 72 |
static function noindex() { |
| 73 |
echo '<meta name="robots" content="noindex,nofollow" />'; |
| 74 |
} |
| 75 |
|
| 76 |
/** |
| 77 |
* Make sure all links and forms open in a new window by default |
| 78 |
* (unless overridden on client-side by JS) |
| 79 |
* Added via `wp_head` action in `init` |
| 80 |
*/ |
| 81 |
static function base_target_blank() { |
| 82 |
echo '<base target="_blank" />'; |
| 83 |
} |
| 84 |
} |
| 85 |
|
