Widgets: Set global `$post` to current queried object instead of nullifying when `is_singular()` while applying filters (and shortcodes) in Text widget and (via plugin) Custom HTML widget.
Also prevent `[gallery]` shortcode from dumping out every attachment on the site when a containing Text widget is shown on an archive template. Props westonruter, bobbingwide, joemcgill for testing. See #10457. Fixes #42548, #42547 for trunk. Built from https://develop.svn.wordpress.org/trunk@42185 git-svn-id: http://core.svn.wordpress.org/trunk@42015 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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@ -4,7 +4,7 @@
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*
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*
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* @global string $wp_version
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* @global string $wp_version
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*/
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*/
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$wp_version = '5.0-alpha-42183';
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$wp_version = '5.0-alpha-42185';
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/**
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/**
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* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
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* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
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@ -80,16 +80,49 @@ class WP_Widget_Custom_HTML extends WP_Widget {
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add_action( 'admin_head-widgets.php', array( 'WP_Widget_Custom_HTML', 'add_help_text' ) );
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add_action( 'admin_head-widgets.php', array( 'WP_Widget_Custom_HTML', 'add_help_text' ) );
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}
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}
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/**
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* Filter gallery shortcode attributes.
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*
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* Prevents all of a site's attachments from being shown in a gallery displayed on a
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* non-singular template where a $post context is not available.
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*
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* @since 4.9.0
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*
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* @param array $attrs Attributes.
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* @return array Attributes.
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*/
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public function _filter_gallery_shortcode_attrs( $attrs ) {
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if ( ! is_singular() && empty( $attrs['id'] ) && empty( $attrs['include'] ) ) {
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$attrs['id'] = -1;
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}
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return $attrs;
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}
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/**
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/**
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* Outputs the content for the current Custom HTML widget instance.
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* Outputs the content for the current Custom HTML widget instance.
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*
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*
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* @since 4.8.1
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* @since 4.8.1
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*
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*
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* @global WP_Post $post
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* @param array $args Display arguments including 'before_title', 'after_title',
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* @param array $args Display arguments including 'before_title', 'after_title',
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* 'before_widget', and 'after_widget'.
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* 'before_widget', and 'after_widget'.
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* @param array $instance Settings for the current Custom HTML widget instance.
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* @param array $instance Settings for the current Custom HTML widget instance.
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*/
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*/
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public function widget( $args, $instance ) {
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public function widget( $args, $instance ) {
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global $post;
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// Override global $post so filters (and shortcodes) apply in a consistent context.
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$original_post = $post;
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if ( is_singular() ) {
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// Make sure post is always the queried object on singular queries (not from another sub-query that failed to clean up the global $post).
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$post = get_queried_object();
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} else {
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// Nullify the $post global during widget rendering to prevent shortcodes from running with the unexpected context on archive queries.
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$post = null;
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}
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// Prevent dumping out all attachments from the media library.
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add_filter( 'shortcode_atts_gallery', array( $this, '_filter_gallery_shortcode_attrs' ) );
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$instance = array_merge( $this->default_instance, $instance );
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$instance = array_merge( $this->default_instance, $instance );
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@ -118,6 +151,10 @@ class WP_Widget_Custom_HTML extends WP_Widget {
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*/
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*/
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$content = apply_filters( 'widget_custom_html_content', $content, $instance, $this );
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$content = apply_filters( 'widget_custom_html_content', $content, $instance, $this );
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// Restore post global.
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$post = $original_post;
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remove_filter( 'shortcode_atts_gallery', array( $this, '_filter_gallery_shortcode_attrs' ) );
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// Inject the Text widget's container class name alongside this widget's class name for theme styling compatibility.
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// Inject the Text widget's container class name alongside this widget's class name for theme styling compatibility.
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$args['before_widget'] = preg_replace( '/(?<=\sclass=["\'])/', 'widget_text ', $args['before_widget'] );
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$args['before_widget'] = preg_replace( '/(?<=\sclass=["\'])/', 'widget_text ', $args['before_widget'] );
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@ -178,6 +178,24 @@ class WP_Widget_Text extends WP_Widget {
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return false;
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return false;
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}
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}
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/**
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* Filter gallery shortcode attributes.
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*
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* Prevents all of a site's attachments from being shown in a gallery displayed on a
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* non-singular template where a $post context is not available.
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*
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* @since 4.9.0
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*
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* @param array $attrs Attributes.
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* @return array Attributes.
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*/
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public function _filter_gallery_shortcode_attrs( $attrs ) {
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if ( ! is_singular() && empty( $attrs['id'] ) && empty( $attrs['include'] ) ) {
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$attrs['id'] = -1;
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}
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return $attrs;
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}
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/**
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/**
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* Outputs the content for the current Text widget instance.
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* Outputs the content for the current Text widget instance.
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*
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*
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@ -221,13 +239,19 @@ class WP_Widget_Text extends WP_Widget {
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remove_filter( 'widget_text', 'do_shortcode', $widget_text_do_shortcode_priority );
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remove_filter( 'widget_text', 'do_shortcode', $widget_text_do_shortcode_priority );
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}
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}
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// Nullify the $post global during widget rendering to prevent shortcodes from running with the unexpected context.
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// Override global $post so filters (and shortcodes) apply in a consistent context.
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$suspended_post = null;
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$original_post = $post;
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if ( isset( $post ) ) {
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if ( is_singular() ) {
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$suspended_post = $post;
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// Make sure post is always the queried object on singular queries (not from another sub-query that failed to clean up the global $post).
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$post = get_queried_object();
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} else {
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// Nullify the $post global during widget rendering to prevent shortcodes from running with the unexpected context on archive queries.
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$post = null;
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$post = null;
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}
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}
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// Prevent dumping out all attachments from the media library.
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add_filter( 'shortcode_atts_gallery', array( $this, '_filter_gallery_shortcode_attrs' ) );
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/**
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/**
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* Filters the content of the Text widget.
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* Filters the content of the Text widget.
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*
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*
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@ -278,9 +302,8 @@ class WP_Widget_Text extends WP_Widget {
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}
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}
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// Restore post global.
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// Restore post global.
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if ( isset( $suspended_post ) ) {
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$post = $original_post;
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$post = $suspended_post;
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remove_filter( 'shortcode_atts_gallery', array( $this, '_filter_gallery_shortcode_attrs' ) );
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}
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// Undo suspension of legacy plugin-supplied shortcode handling.
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// Undo suspension of legacy plugin-supplied shortcode handling.
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if ( $should_suspend_legacy_shortcode_support ) {
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if ( $should_suspend_legacy_shortcode_support ) {
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