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<?php

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/**

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* Widget API: WP_Widget_Text class

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* @package WordPress

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* @subpackage Widgets

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* @since 4.4.0

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/**

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* Core class used to implement a Text widget.

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* @since 2.8.0

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* @see WP_Widget

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class WP_Widget_Text extends WP_Widget {

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/**

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* Whether or not the widget has been registered yet.

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* @since 4.8.1

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* @var bool

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protected $registered = false;

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/**

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* Sets up a new Text widget instance.

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* @since 2.8.0

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public function __construct() {

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$widget_ops = array(

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'classname' => 'widget_text',

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'description' => __( 'Arbitrary text.' ),

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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( 'text', __( 'Text' ), $widget_ops, $control_ops );

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}

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/**

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* Adds hooks for enqueueing assets when registering all widget instances of this widget class.

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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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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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if ( $this->is_preview() ) {

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add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_preview_scripts' ) );

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}

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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_Text', 'render_control_template_scripts' ) );

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}

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/**

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* Determines whether a given instance is legacy and should bypass using TinyMCE.

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* @since 4.8.1

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* @param array $instance {

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* Instance data.

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* @type string $text Content.

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* @type bool|string $filter Whether autop or content filters should apply.

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* @type bool $legacy Whether widget is in legacy mode.

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* }

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* @return bool Whether Text widget instance contains legacy data.

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public function is_legacy_instance( $instance ) {

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// Legacy mode when not in visual mode.

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if ( isset( $instance['visual'] ) ) {

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return ! $instance['visual'];

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}

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// Or, the widget has been added/updated in 4.8.0 then filter prop is 'content' and it is no longer legacy.

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if ( isset( $instance['filter'] ) && 'content' === $instance['filter'] ) {

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return false;

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}

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// If the text is empty, then nothing is preventing migration to TinyMCE.

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if ( empty( $instance['text'] ) ) {

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return false;

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}

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$wpautop = ! empty( $instance['filter'] );

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$has_line_breaks = ( str_contains( trim( $instance['text'] ), "\n" ) );

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// If auto-paragraphs are not enabled and there are line breaks, then ensure legacy mode.

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if ( ! $wpautop && $has_line_breaks ) {

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return true;

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}

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// If an HTML comment is present, assume legacy mode.

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if ( str_contains( $instance['text'], '<!--' ) ) {

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return true;

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}

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// In the rare case that DOMDocument is not available we cannot reliably sniff content and so we assume legacy.

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if ( ! class_exists( 'DOMDocument' ) ) {

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// @codeCoverageIgnoreStart

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return true;

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// @codeCoverageIgnoreEnd

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}

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$doc = new DOMDocument();

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// Suppress warnings generated by loadHTML.

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$errors = libxml_use_internal_errors( true );

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// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged

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@$doc->loadHTML(

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sprintf(

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'<!DOCTYPE html><html><head><meta charset="%s"></head><body>%s</body></html>',

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esc_attr( get_bloginfo( 'charset' ) ),

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$instance['text']

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)

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);

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libxml_use_internal_errors( $errors );

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$body = $doc->getElementsByTagName( 'body' )->item( 0 );

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// See $allowedposttags.

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$safe_elements_attributes = array(

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'strong' => array(),

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'em' => array(),

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'b' => array(),

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'i' => array(),

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'u' => array(),

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's' => array(),

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'ul' => array(),

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'ol' => array(),

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'li' => array(),

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'hr' => array(),

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'abbr' => array(),

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'acronym' => array(),

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'code' => array(),

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'dfn' => array(),

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'a' => array(

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'href' => true,

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'img' => array(

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'src' => true,

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'alt' => true,

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);

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$safe_empty_elements = array( 'img', 'hr', 'iframe' );

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foreach ( $body->getElementsByTagName( '*' ) as $element ) {

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/** @var DOMElement $element */

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$tag_name = strtolower( $element->nodeName );

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// If the element is not safe, then the instance is legacy.

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if ( ! isset( $safe_elements_attributes[ $tag_name ] ) ) {

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return true;

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}

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// If the element is not safely empty and it has empty contents, then legacy mode.

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if ( ! in_array( $tag_name, $safe_empty_elements, true ) && '' === trim( $element->textContent ) ) {

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return true;

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}

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// If an attribute is not recognized as safe, then the instance is legacy.

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foreach ( $element->attributes as $attribute ) {

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/** @var DOMAttr $attribute */

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$attribute_name = strtolower( $attribute->nodeName );

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if ( ! isset( $safe_elements_attributes[ $tag_name ][ $attribute_name ] ) ) {

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return true;

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}

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}

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}

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// Otherwise, the text contains no elements/attributes that TinyMCE could drop, and therefore the widget does not need legacy mode.

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return false;

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}

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/**

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* Filters gallery shortcode attributes.

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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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* @since 4.9.0

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* @param array $attrs Attributes.

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* @return array Attributes.

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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 Text widget instance.

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* @since 2.8.0

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* @global WP_Post $post Global post object.

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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 Text widget instance.

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public function widget( $args, $instance ) {

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global $post;

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$title = ! empty( $instance['title'] ) ? $instance['title'] : '';

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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', $title, $instance, $this->id_base );

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$text = ! empty( $instance['text'] ) ? $instance['text'] : '';

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$is_visual_text_widget = ( ! empty( $instance['visual'] ) && ! empty( $instance['filter'] ) );

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// In 4.8.0 only, visual Text widgets get filter=content, without visual prop; upgrade instance props just-in-time.

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if ( ! $is_visual_text_widget ) {

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$is_visual_text_widget = ( isset( $instance['filter'] ) && 'content' === $instance['filter'] );

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}

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if ( $is_visual_text_widget ) {

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$instance['filter'] = true;

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$instance['visual'] = true;

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}

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* Suspend legacy plugin-supplied do_shortcode() for 'widget_text' filter for the visual Text widget to prevent

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* shortcodes being processed twice. Now do_shortcode() is added to the 'widget_text_content' filter in core itself

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* and it applies after wpautop() to prevent corrupting HTML output added by the shortcode. When do_shortcode() is

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* added to 'widget_text_content' then do_shortcode() will be manually called when in legacy mode as well.

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$widget_text_do_shortcode_priority = has_filter( 'widget_text', 'do_shortcode' );

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$should_suspend_legacy_shortcode_support = ( $is_visual_text_widget && false !== $widget_text_do_shortcode_priority );

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if ( $should_suspend_legacy_shortcode_support ) {

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remove_filter( 'widget_text', 'do_shortcode', $widget_text_do_shortcode_priority );

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}

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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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/**

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* Filters the content of the Text widget.

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* @since 2.3.0

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* @since 4.4.0 Added the `$widget` parameter.

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* @since 4.8.1 The `$widget` param may now be a `WP_Widget_Custom_HTML` object in addition to a `WP_Widget_Text` object.

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* @param string $text The widget content.

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* @param array $instance Array of settings for the current widget.

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* @param WP_Widget_Text|WP_Widget_Custom_HTML $widget Current text or HTML widget instance.

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$text = apply_filters( 'widget_text', $text, $instance, $this );

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if ( $is_visual_text_widget ) {

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/**

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* Filters the content of the Text widget to apply changes expected from the visual (TinyMCE) editor.

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* By default a subset of the_content filters are applied, including wpautop and wptexturize.

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* @since 4.8.0

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* @param string $text The widget content.

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* @param array $instance Array of settings for the current widget.

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* @param WP_Widget_Text $widget Current Text widget instance.

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$text = apply_filters( 'widget_text_content', $text, $instance, $this );

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} else {

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// Now in legacy mode, add paragraphs and line breaks when checkbox is checked.

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if ( ! empty( $instance['filter'] ) ) {

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$text = wpautop( $text );

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}

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* Manually do shortcodes on the content when the core-added filter is present. It is added by default

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* in core by adding do_shortcode() to the 'widget_text_content' filter to apply after wpautop().

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* Since the legacy Text widget runs wpautop() after 'widget_text' filters are applied, the widget in

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* legacy mode here manually applies do_shortcode() on the content unless the default

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* core filter for 'widget_text_content' has been removed, or if do_shortcode() has already

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* been applied via a plugin adding do_shortcode() to 'widget_text' filters.

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if ( has_filter( 'widget_text_content', 'do_shortcode' ) && ! $widget_text_do_shortcode_priority ) {

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if ( ! empty( $instance['filter'] ) ) {

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$text = shortcode_unautop( $text );

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}

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$text = do_shortcode( $text );

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}

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}

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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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// Undo suspension of legacy plugin-supplied shortcode handling.

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if ( $should_suspend_legacy_shortcode_support ) {

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add_filter( 'widget_text', 'do_shortcode', $widget_text_do_shortcode_priority );

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}

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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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$text = preg_replace_callback( '#<(video|iframe|object|embed)\s[^>]*>#i', array( $this, 'inject_video_max_width_style' ), $text );

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<?php

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echo $args['after_widget'];

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}

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/**

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* Injects max-width and removes height for videos too constrained to fit inside sidebars on frontend.

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* @since 4.9.0

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* @see WP_Widget_Media_Video::inject_video_max_width_style()

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* @param array $matches Pattern matches from preg_replace_callback.

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* @return string HTML Output.

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public function inject_video_max_width_style( $matches ) {

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$html = $matches[0];

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$html = preg_replace( '/\sheight="\d+"/', '', $html );

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$html = preg_replace( '/\swidth="\d+"/', '', $html );

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$html = preg_replace( '/(?<=width:)\s*\d+px(?=;?)/', '100%', $html );

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return $html;

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}

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/**

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* Handles updating settings for the current Text widget instance.

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* @since 2.8.0

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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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public function update( $new_instance, $old_instance ) {

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$new_instance = wp_parse_args(

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$new_instance,

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array(

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'title' => '',

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'text' => '',

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'filter' => false, // For back-compat.

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'visual' => null, // Must be explicitly defined.

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)

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);

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$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['text'] = $new_instance['text'];

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} else {

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$instance['text'] = wp_kses_post( $new_instance['text'] );

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}

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$instance['filter'] = ! empty( $new_instance['filter'] );

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// Upgrade 4.8.0 format.

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if ( isset( $old_instance['filter'] ) && 'content' === $old_instance['filter'] ) {

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$instance['visual'] = true;

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}

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if ( 'content' === $new_instance['filter'] ) {

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$instance['visual'] = true;

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}

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if ( isset( $new_instance['visual'] ) ) {

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$instance['visual'] = ! empty( $new_instance['visual'] );

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}

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// Filter is always true in visual mode.

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if ( ! empty( $instance['visual'] ) ) {

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$instance['filter'] = true;

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}

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return $instance;

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}

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/**

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* Enqueues preview scripts.

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* These scripts normally are enqueued just-in-time when a playlist shortcode is used.

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* However, in the customizer, a playlist shortcode may be used in a text widget and

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* dynamically added via selective refresh, so it is important to unconditionally enqueue them.

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* @since 4.9.3

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public function enqueue_preview_scripts() {

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require_once dirname( __DIR__ ) . '/media.php';

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wp_playlist_scripts( 'audio' );

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wp_playlist_scripts( 'video' );

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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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* @since 4.8.0

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public function enqueue_admin_scripts() {

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wp_enqueue_editor();

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wp_enqueue_media();

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wp_enqueue_script( 'text-widgets' );

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wp_add_inline_script( 'text-widgets', sprintf( 'wp.textWidgets.idBases.push( %s );', wp_json_encode( $this->id_base ) ) );

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wp_add_inline_script( 'text-widgets', 'wp.textWidgets.init();', 'after' );

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}

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/**

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* Outputs the Text widget settings form.

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* @since 2.8.0

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* @since 4.8.0 Form only contains hidden inputs which are synced with JS template.

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* @since 4.8.1 Restored original form to be displayed when in legacy mode.

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* @see WP_Widget_Text::render_control_template_scripts()

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* @see _WP_Editors::editor()

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* @param array $instance Current settings.

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public function form( $instance ) {

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$instance = wp_parse_args(

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(array) $instance,

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array(

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'title' => '',

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'text' => '',

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)

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);

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<?php if ( ! $this->is_legacy_instance( $instance ) ) : ?>

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<?php

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if ( user_can_richedit() ) {

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add_filter( 'the_editor_content', 'format_for_editor', 10, 2 );

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$default_editor = 'tinymce';

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} else {

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$default_editor = 'html';

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}

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/** This filter is documented in wp-includes/class-wp-editor.php */

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$text = apply_filters( 'the_editor_content', $instance['text'], $default_editor );

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// Reset filter addition.

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if ( user_can_richedit() ) {

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remove_filter( 'the_editor_content', 'format_for_editor' );

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}

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// Prevent premature closing of textarea in case format_for_editor() didn't apply or the_editor_content filter did a wrong thing.

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$escaped_text = preg_replace( '#</textarea#i', '</textarea', $text );

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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( 'text' ); ?>" name="<?php echo $this->get_field_name( 'text' ); ?>" class="text sync-input" hidden><?php echo $escaped_text; ?></textarea>

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<input id="<?php echo $this->get_field_id( 'filter' ); ?>" name="<?php echo $this->get_field_name( 'filter' ); ?>" class="filter sync-input" type="hidden" value="on">

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<input id="<?php echo $this->get_field_id( 'visual' ); ?>" name="<?php echo $this->get_field_name( 'visual' ); ?>" class="visual sync-input" type="hidden" value="on">

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<?php else : ?>

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<input id="<?php echo $this->get_field_id( 'visual' ); ?>" name="<?php echo $this->get_field_name( 'visual' ); ?>" class="visual" type="hidden" value="">

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<p>

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<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:' ); ?></label>

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<input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo esc_attr( $instance['title'] ); ?>" />

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</p>

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<?php

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if ( ! isset( $instance['visual'] ) ) {

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$widget_info_message = __( 'This widget may contain code that may work better in the “Custom HTML” widget. How about trying that widget instead?' );

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} else {

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$widget_info_message = __( 'This widget may have contained code that may work better in the “Custom HTML” widget. If you have not yet, how about trying that widget instead?' );

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}

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