endpoints as $index => $endpoint ) {
if ( amp_get_slug() === $endpoint[1] ) {
unset( $wp_rewrite->endpoints[ $index ] );
break;
}
}
flush_rewrite_rules();
}
/*
* Register AMP scripts regardless of whether AMP is enabled or it is the AMP endpoint
* for the sake of being able to use AMP components on non-AMP documents ("dirty AMP").
*/
add_action( 'wp_default_scripts', 'amp_register_default_scripts' );
// Ensure async and custom-element/custom-template attributes are present on script tags.
add_filter( 'script_loader_tag', 'amp_filter_script_loader_tag', PHP_INT_MAX, 2 );
/**
* Set up AMP.
*
* This function must be invoked through the 'after_setup_theme' action to allow
* the AMP setting to declare the post types support earlier than plugins/theme.
*
* @since 0.6
*/
function amp_after_setup_theme() {
amp_get_slug(); // Ensure AMP_QUERY_VAR is set.
if ( false === apply_filters( 'amp_is_enabled', true ) ) {
return;
}
add_action( 'init', 'amp_init', 0 ); // Must be 0 because widgets_init happens at init priority 1.
}
add_action( 'after_setup_theme', 'amp_after_setup_theme', 5 );
/**
* Init AMP.
*
* @since 0.1
*/
function amp_init() {
/**
* Triggers on init when AMP plugin is active.
*
* @since 0.3
*/
do_action( 'amp_init' );
load_plugin_textdomain( 'amp', false, plugin_basename( AMP__DIR__ ) . '/languages' );
add_rewrite_endpoint( amp_get_slug(), EP_PERMALINK );
AMP_Validation_Utils::init();
AMP_Theme_Support::init();
AMP_Post_Type_Support::add_post_type_support();
add_filter( 'request', 'amp_force_query_var_value' );
add_action( 'admin_init', 'AMP_Options_Manager::register_settings' );
add_action( 'wp_loaded', 'amp_post_meta_box' );
add_action( 'wp_loaded', 'amp_add_options_menu' );
add_action( 'parse_query', 'amp_correct_query_when_is_front_page' );
// Redirect the old url of amp page to the updated url.
add_filter( 'old_slug_redirect_url', 'amp_redirect_old_slug_to_new_url' );
if ( class_exists( 'Jetpack' ) && ! ( defined( 'IS_WPCOM' ) && IS_WPCOM ) ) {
require_once AMP__DIR__ . '/jetpack-helper.php';
}
// Add actions for legacy post templates.
add_action( 'wp', 'amp_maybe_add_actions' );
}
// Make sure the `amp` query var has an explicit value.
// Avoids issues when filtering the deprecated `query_string` hook.
function amp_force_query_var_value( $query_vars ) {
if ( isset( $query_vars[ amp_get_slug() ] ) && '' === $query_vars[ amp_get_slug() ] ) {
$query_vars[ amp_get_slug() ] = 1;
}
return $query_vars;
}
/**
* Conditionally add AMP actions or render the 'paired mode' template(s).
*
* If the request is for an AMP page and this is in 'canonical mode,' redirect to the non-AMP page.
* It won't need this plugin's template system, nor the frontend actions like the 'rel' link.
*
* @global WP_Query $wp_query
* @since 0.2
* @return void
*/
function amp_maybe_add_actions() {
// Short-circuit when theme supports AMP, as everything is handled by AMP_Theme_Support.
if ( current_theme_supports( 'amp' ) ) {
return;
}
// The remaining logic here is for paired mode running in themes that don't support AMP, the template system in AMP<=0.6.
global $wp_query;
if ( ! ( is_singular() || $wp_query->is_posts_page ) || is_feed() ) {
return;
}
$is_amp_endpoint = is_amp_endpoint();
/**
* Queried post object.
*
* @var WP_Post $post
*/
$post = get_queried_object();
if ( ! post_supports_amp( $post ) ) {
if ( $is_amp_endpoint ) {
wp_safe_redirect( get_permalink( $post->ID ), 302 ); // Temporary redirect because AMP may be supported in future.
exit;
}
return;
}
if ( $is_amp_endpoint ) {
amp_prepare_render();
} else {
amp_add_frontend_actions();
}
}
/**
* Fix up WP_Query for front page when amp query var is present.
*
* Normally the front page would not get served if a query var is present other than preview, page, paged, and cpage.
*
* @since 0.6
* @see WP_Query::parse_query()
* @link https://github.com/WordPress/wordpress-develop/blob/0baa8ae85c670d338e78e408f8d6e301c6410c86/src/wp-includes/class-wp-query.php#L951-L971
*
* @param WP_Query $query Query.
*/
function amp_correct_query_when_is_front_page( WP_Query $query ) {
$is_front_page_query = (
$query->is_main_query()
&&
$query->is_home()
&&
// Is AMP endpoint.
false !== $query->get( amp_get_slug(), false )
&&
// Is query not yet fixed uo up to be front page.
! $query->is_front_page()
&&
// Is showing pages on front.
'page' === get_option( 'show_on_front' )
&&
// Has page on front set.
get_option( 'page_on_front' )
&&
// See line in WP_Query::parse_query() at .
0 === count( array_diff( array_keys( wp_parse_args( $query->query ) ), array( amp_get_slug(), 'preview', 'page', 'paged', 'cpage' ) ) )
);
if ( $is_front_page_query ) {
$query->is_home = false;
$query->is_page = true;
$query->is_singular = true;
$query->set( 'page_id', get_option( 'page_on_front' ) );
}
}
/**
* Whether this is in 'canonical mode.'
*
* Themes can register support for this with `add_theme_support( 'amp' )`.
* Then, this will change the plugin from 'paired mode,' and it won't use its own templates.
* Nor output frontend markup like the 'rel' link. If the theme registers support for AMP with:
* `add_theme_support( 'amp', array( 'template_dir' => 'my-amp-templates' ) )`
* it will retain 'paired mode.
*
* @return boolean Whether this is in AMP 'canonical mode'.
*/
function amp_is_canonical() {
$support = get_theme_support( 'amp' );
if ( true === $support ) {
return true;
}
if ( is_array( $support ) ) {
$args = array_shift( $support );
if ( empty( $args['template_dir'] ) ) {
return true;
}
}
return false;
}
function amp_load_classes() {
_deprecated_function( __FUNCTION__, '0.6' );
}
function amp_add_frontend_actions() {
require_once AMP__DIR__ . '/includes/amp-frontend-actions.php';
}
function amp_add_post_template_actions() {
require_once AMP__DIR__ . '/includes/amp-post-template-actions.php';
require_once AMP__DIR__ . '/includes/amp-post-template-functions.php';
amp_post_template_init_hooks();
}
function amp_prepare_render() {
add_action( 'template_redirect', 'amp_render' );
}
/**
* Render AMP for queried post.
*
* @since 0.1
*/
function amp_render() {
// Note that queried object is used instead of the ID so that the_preview for the queried post can apply.
$post = get_queried_object();
if ( $post instanceof WP_Post ) {
amp_render_post( $post );
exit;
}
}
/**
* Render AMP post template.
*
* @since 0.5
* @param WP_Post|int $post Post.
* @global WP_Query $wp_query
*/
function amp_render_post( $post ) {
global $wp_query;
if ( ! ( $post instanceof WP_Post ) ) {
$post = get_post( $post );
if ( ! $post ) {
return;
}
}
$post_id = $post->ID;
/*
* If amp_render_post is called directly outside of the standard endpoint, is_amp_endpoint() will return false,
* which is not ideal for any code that expects to run in an AMP context.
* Let's force the value to be true while we render AMP.
*/
$was_set = isset( $wp_query->query_vars[ amp_get_slug() ] );
if ( ! $was_set ) {
$wp_query->query_vars[ amp_get_slug() ] = true;
}
// Prevent New Relic from causing invalid AMP responses due the NREUM script it injects after the meta charset.
if ( extension_loaded( 'newrelic' ) ) {
newrelic_disable_autorum();
}
/**
* Fires before rendering a post in AMP.
*
* @since 0.2
*
* @param int $post_id Post ID.
*/
do_action( 'pre_amp_render_post', $post_id );
amp_add_post_template_actions();
$template = new AMP_Post_Template( $post );
$template->load();
if ( ! $was_set ) {
unset( $wp_query->query_vars[ amp_get_slug() ] );
}
}
/**
* Bootstraps the AMP customizer.
*
* Uses the priority of 12 for the 'after_setup_theme' action.
* Many themes run `add_theme_support()` on the 'after_setup_theme' hook, at the default priority of 10.
* And that function's documentation suggests adding it to that action.
* So this enables themes to `add_theme_support( 'amp' )`.
* And `amp_init_customizer()` will be able to recognize theme support by calling `amp_is_canonical()`.
*
* @since 0.4
*/
function _amp_bootstrap_customizer() {
add_action( 'after_setup_theme', 'amp_init_customizer', 12 );
}
add_action( 'plugins_loaded', '_amp_bootstrap_customizer', 9 ); // Should be hooked before priority 10 on 'plugins_loaded' to properly unhook core panels.
/**
* Redirects the old AMP URL to the new AMP URL.
* If post slug is updated the amp page with old post slug will be redirected to the updated url.
*
* @param string $link New URL of the post.
*
* @return string $link URL to be redirected.
*/
function amp_redirect_old_slug_to_new_url( $link ) {
if ( is_amp_endpoint() ) {
$link = trailingslashit( trailingslashit( $link ) . amp_get_slug() );
}
return $link;
}