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<?php

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/**

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* Jetpack Compatibility File

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* See: https://jetpack.com/

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* @package automattic/jetpack

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if ( ! defined( 'ABSPATH' ) ) {

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exit( 0 );

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}

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/**

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* Add Jetpack theme supports for Twenty Nineteen.

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function twentynineteen_jetpack_setup() {

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/**

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* Add theme support for Infinite Scroll.

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add_theme_support(

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'infinite-scroll',

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array(

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'type' => 'click',

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'container' => 'main',

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'render' => 'twentynineteen_infinite_scroll_render',

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'footer' => 'page',

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)

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);

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}

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add_action( 'after_setup_theme', 'twentynineteen_jetpack_setup' );

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/**

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* Custom render function for Infinite Scroll.

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function twentynineteen_infinite_scroll_render() {

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while ( have_posts() ) {

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the_post();

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get_template_part( 'template-parts/content/content' );

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}

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}

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/**

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* Enqueue Jetpack compat styles for Twenty Nineteen.

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function twentynineteen_init_jetpack() {

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/**

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* Add our compat CSS file for Infinite Scroll and custom widget stylings and such.

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* Set the version equal to filemtime for development builds, and the JETPACK__VERSION for production

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* or skip it entirely for wpcom.

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if ( ! is_admin() ) {

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$version = false;

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if ( method_exists( 'Jetpack', 'is_development_version' ) ) {

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$version = Jetpack::is_development_version() ? filemtime( plugin_dir_path( __FILE__ ) . 'twentynineteen.css' ) : JETPACK__VERSION;

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}

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wp_enqueue_style( 'twentynineteen-jetpack', plugins_url( 'twentynineteen.css', __FILE__ ), array(), $version );

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wp_style_add_data( 'twentynineteen-jetpack', 'rtl', 'replace' );

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}

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}

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add_action( 'init', 'twentynineteen_init_jetpack' );

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/**

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* Alter gallery widget default width.

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function twentynineteen_gallery_widget_content_width() {

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return 390;

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}

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add_filter( 'gallery_widget_content_width', 'twentynineteen_gallery_widget_content_width' );

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/**

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* Adds custom classes to the array of body classes.

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* @param array $classes Classes for the body element.

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* @return array

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function twentynineteen_jetpack_body_classes( $classes ) {

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// Adds a class if we're in the Customizer.

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if ( is_customize_preview() ) :

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$classes[] = 'twentynineteen-customizer';

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endif;

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return $classes;

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}

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add_filter( 'body_class', 'twentynineteen_jetpack_body_classes' );

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/**

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* Load AMP theme specific hooks for infinite scroll.

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* @return void

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function amp_twentynineteen_infinite_scroll_render_hooks() {

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add_filter( 'jetpack_amp_infinite_footers', 'twentynineteen_amp_infinite_footers', 10, 2 );

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add_filter( 'jetpack_amp_infinite_output', 'twentynineteen_amp_infinite_output' );

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add_filter( 'jetpack_amp_infinite_older_posts', 'twentynineteen_amp_infinite_older_posts' );

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}

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/**

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* Get the theme specific footers.

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* @param array $footers The footers of the themes.

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* @param string $buffer Contents of the output buffer.

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* @return mixed

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function twentynineteen_amp_infinite_footers( $footers, $buffer ) {

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// Collect the footer wrapper.

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preg_match(

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'/<footer id="colophon".*/s',

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$buffer,

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$footer

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);

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$footers[] = reset( $footer );

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return $footers;

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}

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/**

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* Hide and remove various elements from next page load.

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* @param string $buffer Contents of the output buffer.

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* @return string

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function twentynineteen_amp_infinite_output( $buffer ) {

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// Hide site header on next page load.

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$buffer = preg_replace(

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'/id="masthead"/',

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'$0 next-page-hide',

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$buffer

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);

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// Hide pagination on next page load.

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$buffer = preg_replace(

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'/class=".*navigation pagination.*"/',

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'$0 next-page-hide hidden',

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$buffer

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);

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// Remove the footer as it will be added back to amp next page footer.

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$buffer = preg_replace(

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'/<footer id="colophon".*/s',

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'',

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$buffer

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);

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return $buffer;

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}

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/**

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* Filter the AMP infinite scroll older posts button

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* @return string

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function twentynineteen_amp_infinite_older_posts() {

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ob_start();

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<span>

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<?php esc_html_e( 'Older posts', 'jetpack' ); ?>

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</button>

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</a>

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</span>

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</div>

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<?php

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return ob_get_clean();

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}

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