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Diffstat (limited to 'wp-includes/widgets/class-wp-widget-rss.php')
| -rw-r--r-- | wp-includes/widgets/class-wp-widget-rss.php | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/wp-includes/widgets/class-wp-widget-rss.php b/wp-includes/widgets/class-wp-widget-rss.php new file mode 100644 index 0000000..a4a1b19 --- /dev/null +++ b/wp-includes/widgets/class-wp-widget-rss.php @@ -0,0 +1,185 @@ +<?php +/** + * Widget API: WP_Widget_RSS class + * + * @package WordPress + * @subpackage Widgets + * @since 4.4.0 + */ + +/** + * Core class used to implement a RSS widget. + * + * @since 2.8.0 + * + * @see WP_Widget + */ +class WP_Widget_RSS extends WP_Widget { + + /** + * Sets up a new RSS widget instance. + * + * @since 2.8.0 + */ + public function __construct() { + $widget_ops = array( + 'description' => __( 'Entries from any RSS or Atom feed.' ), + 'customize_selective_refresh' => true, + 'show_instance_in_rest' => true, + + ); + $control_ops = array( + 'width' => 400, + 'height' => 200, + ); + parent::__construct( 'rss', __( 'RSS' ), $widget_ops, $control_ops ); + } + + /** + * Outputs the content for the current RSS widget instance. + * + * @since 2.8.0 + * + * @param array $args Display arguments including 'before_title', 'after_title', + * 'before_widget', and 'after_widget'. + * @param array $instance Settings for the current RSS widget instance. + */ + public function widget( $args, $instance ) { + if ( isset( $instance['error'] ) && $instance['error'] ) { + return; + } + + $url = ! empty( $instance['url'] ) ? $instance['url'] : ''; + while ( ! empty( $url ) && stristr( $url, 'http' ) !== $url ) { + $url = substr( $url, 1 ); + } + + if ( empty( $url ) ) { + return; + } + + // Self-URL destruction sequence. + if ( in_array( untrailingslashit( $url ), array( site_url(), home_url() ), true ) ) { + return; + } + + $rss = fetch_feed( $url ); + $title = $instance['title']; + $desc = ''; + $link = ''; + + if ( ! is_wp_error( $rss ) ) { + $desc = esc_attr( strip_tags( html_entity_decode( $rss->get_description(), ENT_QUOTES, get_option( 'blog_charset' ) ) ) ); + if ( empty( $title ) ) { + $title = strip_tags( $rss->get_title() ); + } + $link = strip_tags( $rss->get_permalink() ); + while ( ! empty( $link ) && stristr( $link, 'http' ) !== $link ) { + $link = substr( $link, 1 ); + } + } + + if ( empty( $title ) ) { + $title = ! empty( $desc ) ? $desc : __( 'Unknown Feed' ); + } + + /** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */ + $title = apply_filters( 'widget_title', $title, $instance, $this->id_base ); + + if ( $title ) { + $feed_link = ''; + $feed_url = strip_tags( $url ); + $feed_icon = includes_url( 'images/rss.png' ); + $feed_link = sprintf( + '<a class="rsswidget rss-widget-feed" href="%1$s"><img class="rss-widget-icon" style="border:0" width="14" height="14" src="%2$s" alt="%3$s"%4$s /></a> ', + esc_url( $feed_url ), + esc_url( $feed_icon ), + esc_attr__( 'RSS' ), + ( wp_lazy_loading_enabled( 'img', 'rss_widget_feed_icon' ) ? ' loading="lazy"' : '' ) + ); + + /** + * Filters the classic RSS widget's feed icon link. + * + * Themes can remove the icon link by using `add_filter( 'rss_widget_feed_link', '__return_empty_string' );`. + * + * @since 5.9.0 + * + * @param string|false $feed_link HTML for link to RSS feed. + * @param array $instance Array of settings for the current widget. + */ + $feed_link = apply_filters( 'rss_widget_feed_link', $feed_link, $instance ); + + $title = $feed_link . '<a class="rsswidget rss-widget-title" href="' . esc_url( $link ) . '">' . esc_html( $title ) . '</a>'; + } + + echo $args['before_widget']; + if ( $title ) { + echo $args['before_title'] . $title . $args['after_title']; + } + + $format = current_theme_supports( 'html5', 'navigation-widgets' ) ? 'html5' : 'xhtml'; + + /** This filter is documented in wp-includes/widgets/class-wp-nav-menu-widget.php */ + $format = apply_filters( 'navigation_widgets_format', $format ); + + if ( 'html5' === $format ) { + // The title may be filtered: Strip out HTML and make sure the aria-label is never empty. + $title = trim( strip_tags( $title ) ); + $aria_label = $title ? $title : __( 'RSS Feed' ); + echo '<nav aria-label="' . esc_attr( $aria_label ) . '">'; + } + + wp_widget_rss_output( $rss, $instance ); + + if ( 'html5' === $format ) { + echo '</nav>'; + } + + echo $args['after_widget']; + + if ( ! is_wp_error( $rss ) ) { + $rss->__destruct(); + } + unset( $rss ); + } + + /** + * Handles updating settings for the current RSS widget instance. + * + * @since 2.8.0 + * + * @param array $new_instance New settings for this instance as input by the user via + * WP_Widget::form(). + * @param array $old_instance Old settings for this instance. + * @return array Updated settings to save. + */ + public function update( $new_instance, $old_instance ) { + $testurl = ( isset( $new_instance['url'] ) && ( ! isset( $old_instance['url'] ) || ( $new_instance['url'] !== $old_instance['url'] ) ) ); + return wp_widget_rss_process( $new_instance, $testurl ); + } + + /** + * Outputs the settings form for the RSS widget. + * + * @since 2.8.0 + * + * @param array $instance Current settings. + */ + public function form( $instance ) { + if ( empty( $instance ) ) { + $instance = array( + 'title' => '', + 'url' => '', + 'items' => 10, + 'error' => false, + 'show_summary' => 0, + 'show_author' => 0, + 'show_date' => 0, + ); + } + $instance['number'] = $this->number; + + wp_widget_rss_form( $instance ); + } +} |