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9c5d4ca8d1
This aims to provide better context for translators and make it easier to determine that some strings contain hidden accessibility text and are not displayed in the UI. Props kebbet, mercime, pavelevap, ocean90, swissspidy, Chouby, jipmoors, afercia, desrosj, costdev, audrasjb, SergeyBiryukov. Fixes #29748. Built from https://develop.svn.wordpress.org/trunk@55276 git-svn-id: http://core.svn.wordpress.org/trunk@54809 1a063a9b-81f0-0310-95a4-ce76da25c4cd
340 lines
12 KiB
PHP
340 lines
12 KiB
PHP
<?php
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/**
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* Widget API: WP_Widget_Custom_HTML class
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*
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* @package WordPress
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* @subpackage Widgets
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* @since 4.8.1
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*/
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/**
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* Core class used to implement a Custom HTML widget.
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*
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* @since 4.8.1
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*
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* @see WP_Widget
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*/
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class WP_Widget_Custom_HTML extends WP_Widget {
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/**
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* Whether or not the widget has been registered yet.
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*
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* @since 4.9.0
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* @var bool
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*/
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protected $registered = false;
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/**
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* Default instance.
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*
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* @since 4.8.1
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* @var array
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*/
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protected $default_instance = array(
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'title' => '',
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'content' => '',
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);
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/**
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* Sets up a new Custom HTML widget instance.
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*
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* @since 4.8.1
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*/
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public function __construct() {
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$widget_ops = array(
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'classname' => 'widget_custom_html',
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'description' => __( 'Arbitrary HTML code.' ),
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'customize_selective_refresh' => true,
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'show_instance_in_rest' => true,
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);
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$control_ops = array(
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'width' => 400,
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'height' => 350,
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);
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parent::__construct( 'custom_html', __( 'Custom HTML' ), $widget_ops, $control_ops );
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}
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/**
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* Add hooks for enqueueing assets when registering all widget instances of this widget class.
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*
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* @since 4.9.0
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*
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* @param int $number Optional. The unique order number of this widget instance
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* compared to other instances of the same class. Default -1.
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*/
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public function _register_one( $number = -1 ) {
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parent::_register_one( $number );
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if ( $this->registered ) {
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return;
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}
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$this->registered = true;
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wp_add_inline_script( 'custom-html-widgets', sprintf( 'wp.customHtmlWidgets.idBases.push( %s );', wp_json_encode( $this->id_base ) ) );
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// Note that the widgets component in the customizer will also do
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// the 'admin_print_scripts-widgets.php' action in WP_Customize_Widgets::print_scripts().
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add_action( 'admin_print_scripts-widgets.php', array( $this, 'enqueue_admin_scripts' ) );
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// Note that the widgets component in the customizer will also do
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// the 'admin_footer-widgets.php' action in WP_Customize_Widgets::print_footer_scripts().
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add_action( 'admin_footer-widgets.php', array( 'WP_Widget_Custom_HTML', 'render_control_template_scripts' ) );
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// Note this action is used to ensure the help text is added to the end.
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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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* Filters 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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* Outputs the content for the current Custom HTML widget instance.
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*
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* @since 4.8.1
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*
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* @global WP_Post $post Global post object.
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*
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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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* @param array $instance Settings for the current Custom HTML widget instance.
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*/
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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, $instance );
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/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
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$title = apply_filters( 'widget_title', $instance['title'], $instance, $this->id_base );
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// Prepare instance data that looks like a normal Text widget.
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$simulated_text_widget_instance = array_merge(
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$instance,
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array(
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'text' => isset( $instance['content'] ) ? $instance['content'] : '',
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'filter' => false, // Because wpautop is not applied.
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'visual' => false, // Because it wasn't created in TinyMCE.
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)
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);
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unset( $simulated_text_widget_instance['content'] ); // Was moved to 'text' prop.
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/** This filter is documented in wp-includes/widgets/class-wp-widget-text.php */
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$content = apply_filters( 'widget_text', $instance['content'], $simulated_text_widget_instance, $this );
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// Adds 'noopener' relationship, without duplicating values, to all HTML A elements that have a target.
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$content = wp_targeted_link_rel( $content );
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/**
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* Filters the content of the Custom HTML widget.
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*
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* @since 4.8.1
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*
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* @param string $content The widget content.
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* @param array $instance Array of settings for the current widget.
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* @param WP_Widget_Custom_HTML $widget Current Custom HTML widget instance.
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*/
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$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( $this, '_filter_gallery_shortcode_attrs' ) );
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// Inject the Text widget's container class name alongside this widget's class name for theme styling compatibility.
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$args['before_widget'] = preg_replace( '/(?<=\sclass=["\'])/', 'widget_text ', $args['before_widget'] );
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echo $args['before_widget'];
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if ( ! empty( $title ) ) {
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echo $args['before_title'] . $title . $args['after_title'];
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}
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echo '<div class="textwidget custom-html-widget">'; // The textwidget class is for theme styling compatibility.
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echo $content;
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echo '</div>';
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echo $args['after_widget'];
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}
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/**
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* Handles updating settings for the current Custom HTML widget instance.
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*
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* @since 4.8.1
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*
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* @param array $new_instance New settings for this instance as input by the user via
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* WP_Widget::form().
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* @param array $old_instance Old settings for this instance.
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* @return array Settings to save or bool false to cancel saving.
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*/
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public function update( $new_instance, $old_instance ) {
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$instance = array_merge( $this->default_instance, $old_instance );
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$instance['title'] = sanitize_text_field( $new_instance['title'] );
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if ( current_user_can( 'unfiltered_html' ) ) {
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$instance['content'] = $new_instance['content'];
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} else {
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$instance['content'] = wp_kses_post( $new_instance['content'] );
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}
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return $instance;
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}
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/**
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* Loads the required scripts and styles for the widget control.
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*
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* @since 4.9.0
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*/
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public function enqueue_admin_scripts() {
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$settings = wp_enqueue_code_editor(
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array(
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'type' => 'text/html',
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'codemirror' => array(
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'indentUnit' => 2,
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'tabSize' => 2,
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),
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)
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);
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wp_enqueue_script( 'custom-html-widgets' );
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if ( empty( $settings ) ) {
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$settings = array(
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'disabled' => true,
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);
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}
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wp_add_inline_script( 'custom-html-widgets', sprintf( 'wp.customHtmlWidgets.init( %s );', wp_json_encode( $settings ) ), 'after' );
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$l10n = array(
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'errorNotice' => array(
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/* translators: %d: Error count. */
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'singular' => _n( 'There is %d error which must be fixed before you can save.', 'There are %d errors which must be fixed before you can save.', 1 ),
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/* translators: %d: Error count. */
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'plural' => _n( 'There is %d error which must be fixed before you can save.', 'There are %d errors which must be fixed before you can save.', 2 ),
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// @todo This is lacking, as some languages have a dedicated dual form. For proper handling of plurals in JS, see #20491.
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),
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);
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wp_add_inline_script( 'custom-html-widgets', sprintf( 'jQuery.extend( wp.customHtmlWidgets.l10n, %s );', wp_json_encode( $l10n ) ), 'after' );
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}
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/**
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* Outputs the Custom HTML widget settings form.
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*
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* @since 4.8.1
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* @since 4.9.0 The form contains only hidden sync inputs. For the control UI, see `WP_Widget_Custom_HTML::render_control_template_scripts()`.
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*
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* @see WP_Widget_Custom_HTML::render_control_template_scripts()
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*
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* @param array $instance Current instance.
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*/
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public function form( $instance ) {
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$instance = wp_parse_args( (array) $instance, $this->default_instance );
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?>
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<input id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" class="title sync-input" type="hidden" value="<?php echo esc_attr( $instance['title'] ); ?>" />
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<textarea id="<?php echo $this->get_field_id( 'content' ); ?>" name="<?php echo $this->get_field_name( 'content' ); ?>" class="content sync-input" hidden><?php echo esc_textarea( $instance['content'] ); ?></textarea>
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<?php
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}
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/**
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* Render form template scripts.
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*
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* @since 4.9.0
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*/
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public static function render_control_template_scripts() {
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?>
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<script type="text/html" id="tmpl-widget-custom-html-control-fields">
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<# var elementIdPrefix = 'el' + String( Math.random() ).replace( /\D/g, '' ) + '_' #>
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<p>
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<label for="{{ elementIdPrefix }}title"><?php esc_html_e( 'Title:' ); ?></label>
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<input id="{{ elementIdPrefix }}title" type="text" class="widefat title">
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</p>
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<p>
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<label for="{{ elementIdPrefix }}content" id="{{ elementIdPrefix }}content-label"><?php esc_html_e( 'Content:' ); ?></label>
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<textarea id="{{ elementIdPrefix }}content" class="widefat code content" rows="16" cols="20"></textarea>
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</p>
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<?php if ( ! current_user_can( 'unfiltered_html' ) ) : ?>
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<?php
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$probably_unsafe_html = array( 'script', 'iframe', 'form', 'input', 'style' );
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$allowed_html = wp_kses_allowed_html( 'post' );
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$disallowed_html = array_diff( $probably_unsafe_html, array_keys( $allowed_html ) );
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?>
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<?php if ( ! empty( $disallowed_html ) ) : ?>
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<# if ( data.codeEditorDisabled ) { #>
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<p>
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<?php _e( 'Some HTML tags are not permitted, including:' ); ?>
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<code><?php echo implode( '</code>, <code>', $disallowed_html ); ?></code>
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</p>
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<# } #>
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<?php endif; ?>
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<?php endif; ?>
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<div class="code-editor-error-container"></div>
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</script>
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<?php
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}
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/**
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* Add help text to widgets admin screen.
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*
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* @since 4.9.0
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*/
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public static function add_help_text() {
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$screen = get_current_screen();
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$content = '<p>';
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$content .= __( 'Use the Custom HTML widget to add arbitrary HTML code to your widget areas.' );
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$content .= '</p>';
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if ( 'false' !== wp_get_current_user()->syntax_highlighting ) {
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$content .= '<p>';
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$content .= sprintf(
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/* translators: 1: Link to user profile, 2: Additional link attributes, 3: Accessibility text. */
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__( 'The edit field automatically highlights code syntax. You can disable this in your <a href="%1$s" %2$s>user profile%3$s</a> to work in plain text mode.' ),
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esc_url( get_edit_profile_url() ),
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'class="external-link" target="_blank"',
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sprintf(
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'<span class="screen-reader-text"> %s</span>',
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/* translators: Hidden accessibility text. */
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__( '(opens in a new tab)' )
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)
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);
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$content .= '</p>';
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$content .= '<p id="editor-keyboard-trap-help-1">' . __( 'When using a keyboard to navigate:' ) . '</p>';
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$content .= '<ul>';
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$content .= '<li id="editor-keyboard-trap-help-2">' . __( 'In the editing area, the Tab key enters a tab character.' ) . '</li>';
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$content .= '<li id="editor-keyboard-trap-help-3">' . __( 'To move away from this area, press the Esc key followed by the Tab key.' ) . '</li>';
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$content .= '<li id="editor-keyboard-trap-help-4">' . __( 'Screen reader users: when in forms mode, you may need to press the Esc key twice.' ) . '</li>';
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$content .= '</ul>';
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}
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$screen->add_help_tab(
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array(
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'id' => 'custom_html_widget',
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'title' => __( 'Custom HTML Widget' ),
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'content' => $content,
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)
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);
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}
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}
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