<?php

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/**

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* Widget API: WP_Widget_Calendar class

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*

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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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/**

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* Core class used to implement the Calendar widget.

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*

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* @since 2.8.0

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*

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* @see WP_Widget

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*/

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class WP_Widget_Calendar extends WP_Widget {

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/**

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* Ensure that the ID attribute only appears in the markup once

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*

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* @since 4.4.0

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* @var int

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*/

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private static $instance = 0;

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/**

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* Sets up a new Calendar widget instance.

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*

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* @since 2.8.0

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*/

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public function __construct() {

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$widget_ops = array(

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'classname' => 'widget_calendar',

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'description' => __( 'A calendar of your site’s posts.' ),

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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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parent::__construct( 'calendar', __( 'Calendar' ), $widget_ops );

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}

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/**

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* Outputs the content for the current Calendar widget instance.

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*

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* @since 2.8.0

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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 The settings for the particular instance of the widget.

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*/

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public function widget( $args, $instance ) {

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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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echo $args['before_widget'];

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if ( $title ) {

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echo $args['before_title'] . $title . $args['after_title'];

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}

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if ( 0 === self::$instance ) {

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echo '<div id="calendar_wrap" class="calendar_wrap">';

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} else {

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echo '<div class="calendar_wrap">';

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}

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get_calendar();

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echo '</div>';

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echo $args['after_widget'];

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++self::$instance;

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}

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/**

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* Handles updating settings for the current Calendar widget instance.

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*

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* @since 2.8.0

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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 Updated settings to save.

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*/

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public function update( $new_instance, $old_instance ) {

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$instance = $old_instance;

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$instance['title'] = sanitize_text_field( $new_instance['title'] );

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return $instance;

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}

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/**

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* Outputs the settings form for the Calendar widget.

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*

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* @since 2.8.0

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*

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* @param array $instance Current settings.

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*/

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public function form( $instance ) {

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$instance = wp_parse_args( (array) $instance, array( 'title' => '' ) );

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?>

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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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}

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}

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