1271 lines
38 KiB
PHP
1271 lines
38 KiB
PHP
<?php
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/**
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* API for creating dynamic sidebar without hardcoding functionality into
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* themes. Includes both internal WordPress routines and theme use routines.
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*
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* This functionality was found in a plugin before WordPress 2.2 release which
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* included it in the core from that point on.
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*
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* @link http://codex.wordpress.org/Plugins/WordPress_Widgets WordPress Widgets
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* @link http://codex.wordpress.org/Plugins/WordPress_Widgets_Api Widgets API
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*
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* @package WordPress
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* @subpackage Widgets
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*/
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/**
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* This class must be extended for each widget and WP_Widget::widget(), WP_Widget::update()
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* and WP_Widget::form() need to be over-ridden.
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*
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* @package WordPress
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* @subpackage Widgets
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* @since 2.8
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*/
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class WP_Widget {
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var $id_base; // Root id for all widgets of this type.
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var $name; // Name for this widget type.
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var $widget_options; // Option array passed to wp_register_sidebar_widget()
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var $control_options; // Option array passed to wp_register_widget_control()
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var $number = false; // Unique ID number of the current instance.
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var $id = false; // Unique ID string of the current instance (id_base-number)
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var $updated = false; // Set true when we update the data after a POST submit - makes sure we don't do it twice.
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// Member functions that you must over-ride.
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/** Echo the widget content.
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*
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* Subclasses should over-ride this function to generate their widget code.
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*
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* @param array $args Display arguments including before_title, after_title, before_widget, and after_widget.
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* @param array $instance The settings for the particular instance of the widget
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*/
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function widget($args, $instance) {
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die('function WP_Widget::widget() must be over-ridden in a sub-class.');
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}
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/** Update a particular instance.
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*
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* This function should check that $new_instance is set correctly.
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* The newly calculated value of $instance should be returned.
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* If "false" is returned, the instance won't be saved/updated.
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*
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* @param array $new_instance New settings for this instance as input by the user via form()
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* @param array $old_instance Old settings for this instance
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* @return array Settings to save or bool false to cancel saving
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*/
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function update($new_instance, $old_instance) {
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return $new_instance;
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}
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/** Echo the settings update form
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*
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* @param array $instance Current settings
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*/
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function form($instance) {
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echo '<p class="no-options-widget">' . __('There are no options for this widget.') . '</p>';
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return 'noform';
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}
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// Functions you'll need to call.
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/**
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* PHP4 constructor
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*/
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function WP_Widget( $id_base = false, $name, $widget_options = array(), $control_options = array() ) {
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WP_Widget::__construct( $id_base, $name, $widget_options, $control_options );
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}
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/**
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* PHP5 constructor
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*
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* @param string $id_base Optional Base ID for the widget, lower case,
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* if left empty a portion of the widget's class name will be used. Has to be unique.
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* @param string $name Name for the widget displayed on the configuration page.
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* @param array $widget_options Optional Passed to wp_register_sidebar_widget()
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* - description: shown on the configuration page
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* - classname
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* @param array $control_options Optional Passed to wp_register_widget_control()
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* - width: required if more than 250px
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* - height: currently not used but may be needed in the future
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*/
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function __construct( $id_base = false, $name, $widget_options = array(), $control_options = array() ) {
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$this->id_base = empty($id_base) ? preg_replace( '/(wp_)?widget_/', '', strtolower(get_class($this)) ) : strtolower($id_base);
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$this->name = $name;
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$this->option_name = 'widget_' . $this->id_base;
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$this->widget_options = wp_parse_args( $widget_options, array('classname' => $this->option_name) );
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$this->control_options = wp_parse_args( $control_options, array('id_base' => $this->id_base) );
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}
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/**
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* Constructs name attributes for use in form() fields
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*
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* This function should be used in form() methods to create name attributes for fields to be saved by update()
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*
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* @param string $field_name Field name
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* @return string Name attribute for $field_name
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*/
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function get_field_name($field_name) {
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return 'widget-' . $this->id_base . '[' . $this->number . '][' . $field_name . ']';
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}
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/**
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* Constructs id attributes for use in form() fields
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*
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* This function should be used in form() methods to create id attributes for fields to be saved by update()
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*
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* @param string $field_name Field name
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* @return string ID attribute for $field_name
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*/
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function get_field_id($field_name) {
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return 'widget-' . $this->id_base . '-' . $this->number . '-' . $field_name;
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}
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// Private Functions. Don't worry about these.
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function _register() {
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$settings = $this->get_settings();
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$empty = true;
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if ( is_array($settings) ) {
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foreach ( array_keys($settings) as $number ) {
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if ( is_numeric($number) ) {
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$this->_set($number);
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$this->_register_one($number);
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$empty = false;
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}
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}
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}
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if ( $empty ) {
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// If there are none, we register the widget's existence with a
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// generic template
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$this->_set(1);
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$this->_register_one();
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}
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}
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function _set($number) {
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$this->number = $number;
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$this->id = $this->id_base . '-' . $number;
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}
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function _get_display_callback() {
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return array($this, 'display_callback');
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}
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function _get_update_callback() {
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return array($this, 'update_callback');
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}
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function _get_form_callback() {
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return array($this, 'form_callback');
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}
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/** Generate the actual widget content.
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* Just finds the instance and calls widget().
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* Do NOT over-ride this function. */
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function display_callback( $args, $widget_args = 1 ) {
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if ( is_numeric($widget_args) )
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$widget_args = array( 'number' => $widget_args );
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$widget_args = wp_parse_args( $widget_args, array( 'number' => -1 ) );
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$this->_set( $widget_args['number'] );
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$instance = $this->get_settings();
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if ( array_key_exists( $this->number, $instance ) ) {
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$instance = $instance[$this->number];
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// filters the widget's settings, return false to stop displaying the widget
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$instance = apply_filters('widget_display_callback', $instance, $this, $args);
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if ( false !== $instance )
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$this->widget($args, $instance);
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}
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}
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/** Deal with changed settings.
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* Do NOT over-ride this function. */
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function update_callback( $widget_args = 1 ) {
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global $wp_registered_widgets;
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if ( is_numeric($widget_args) )
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$widget_args = array( 'number' => $widget_args );
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$widget_args = wp_parse_args( $widget_args, array( 'number' => -1 ) );
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$all_instances = $this->get_settings();
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// We need to update the data
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if ( $this->updated )
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return;
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$sidebars_widgets = wp_get_sidebars_widgets();
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if ( isset($_POST['delete_widget']) && $_POST['delete_widget'] ) {
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// Delete the settings for this instance of the widget
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if ( isset($_POST['the-widget-id']) )
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$del_id = $_POST['the-widget-id'];
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else
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return;
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if ( isset($wp_registered_widgets[$del_id]['params'][0]['number']) ) {
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$number = $wp_registered_widgets[$del_id]['params'][0]['number'];
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if ( $this->id_base . '-' . $number == $del_id )
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unset($all_instances[$number]);
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}
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} else {
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if ( isset($_POST['widget-' . $this->id_base]) && is_array($_POST['widget-' . $this->id_base]) ) {
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$settings = $_POST['widget-' . $this->id_base];
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} elseif ( isset($_POST['id_base']) && $_POST['id_base'] == $this->id_base ) {
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$num = $_POST['multi_number'] ? (int) $_POST['multi_number'] : (int) $_POST['widget_number'];
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$settings = array( $num => array() );
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} else {
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return;
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}
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foreach ( $settings as $number => $new_instance ) {
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$new_instance = stripslashes_deep($new_instance);
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$this->_set($number);
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$old_instance = isset($all_instances[$number]) ? $all_instances[$number] : array();
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$instance = $this->update($new_instance, $old_instance);
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// filters the widget's settings before saving, return false to cancel saving (keep the old settings if updating)
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$instance = apply_filters('widget_update_callback', $instance, $new_instance, $old_instance, $this);
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if ( false !== $instance )
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$all_instances[$number] = $instance;
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break; // run only once
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}
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}
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$this->save_settings($all_instances);
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$this->updated = true;
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}
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/** Generate the control form.
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* Do NOT over-ride this function. */
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function form_callback( $widget_args = 1 ) {
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if ( is_numeric($widget_args) )
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$widget_args = array( 'number' => $widget_args );
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$widget_args = wp_parse_args( $widget_args, array( 'number' => -1 ) );
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$all_instances = $this->get_settings();
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if ( -1 == $widget_args['number'] ) {
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// We echo out a form where 'number' can be set later
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$this->_set('__i__');
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$instance = array();
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} else {
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$this->_set($widget_args['number']);
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$instance = $all_instances[ $widget_args['number'] ];
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}
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// filters the widget admin form before displaying, return false to stop displaying it
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$instance = apply_filters('widget_form_callback', $instance, $this);
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$return = null;
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if ( false !== $instance ) {
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$return = $this->form($instance);
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// add extra fields in the widget form - be sure to set $return to null if you add any
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// if the widget has no form the text echoed from the default form method can be hidden using css
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do_action_ref_array( 'in_widget_form', array(&$this, &$return, $instance) );
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}
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return $return;
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}
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/** Helper function: Registers a single instance. */
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function _register_one($number = -1) {
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wp_register_sidebar_widget( $this->id, $this->name, $this->_get_display_callback(), $this->widget_options, array( 'number' => $number ) );
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_register_widget_update_callback( $this->id_base, $this->_get_update_callback(), $this->control_options, array( 'number' => -1 ) );
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_register_widget_form_callback( $this->id, $this->name, $this->_get_form_callback(), $this->control_options, array( 'number' => $number ) );
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}
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function save_settings($settings) {
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$settings['_multiwidget'] = 1;
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update_option( $this->option_name, $settings );
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}
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function get_settings() {
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$settings = get_option($this->option_name);
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if ( false === $settings && isset($this->alt_option_name) )
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$settings = get_option($this->alt_option_name);
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if ( !is_array($settings) )
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$settings = array();
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if ( !empty($settings) && !array_key_exists('_multiwidget', $settings) ) {
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// old format, convert if single widget
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$settings = wp_convert_widget_settings($this->id_base, $this->option_name, $settings);
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}
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unset($settings['_multiwidget'], $settings['__i__']);
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return $settings;
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}
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}
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/**
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* Singleton that registers and instantiates WP_Widget classes.
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*
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* @package WordPress
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* @subpackage Widgets
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* @since 2.8
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*/
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class WP_Widget_Factory {
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var $widgets = array();
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function WP_Widget_Factory() {
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add_action( 'widgets_init', array( $this, '_register_widgets' ), 100 );
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}
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function register($widget_class) {
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$this->widgets[$widget_class] = new $widget_class();
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}
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function unregister($widget_class) {
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if ( isset($this->widgets[$widget_class]) )
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unset($this->widgets[$widget_class]);
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}
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function _register_widgets() {
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global $wp_registered_widgets;
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$keys = array_keys($this->widgets);
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$registered = array_keys($wp_registered_widgets);
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$registered = array_map('_get_widget_id_base', $registered);
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foreach ( $keys as $key ) {
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// don't register new widget if old widget with the same id is already registered
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if ( in_array($this->widgets[$key]->id_base, $registered, true) ) {
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unset($this->widgets[$key]);
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continue;
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}
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$this->widgets[$key]->_register();
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}
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}
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}
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/* Global Variables */
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/** @ignore */
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global $wp_registered_sidebars, $wp_registered_widgets, $wp_registered_widget_controls, $wp_registered_widget_updates;
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/**
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* Stores the sidebars, since many themes can have more than one.
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*
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* @global array $wp_registered_sidebars
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* @since 2.2.0
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*/
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$wp_registered_sidebars = array();
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/**
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* Stores the registered widgets.
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*
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* @global array $wp_registered_widgets
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* @since 2.2.0
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*/
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$wp_registered_widgets = array();
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/**
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* Stores the registered widget control (options).
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*
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* @global array $wp_registered_widget_controls
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* @since 2.2.0
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*/
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$wp_registered_widget_controls = array();
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$wp_registered_widget_updates = array();
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/**
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* Private
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*/
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$_wp_sidebars_widgets = array();
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/**
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* Private
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*/
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$GLOBALS['_wp_deprecated_widgets_callbacks'] = array(
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'wp_widget_pages',
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'wp_widget_pages_control',
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'wp_widget_calendar',
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'wp_widget_calendar_control',
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'wp_widget_archives',
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'wp_widget_archives_control',
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'wp_widget_links',
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'wp_widget_meta',
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'wp_widget_meta_control',
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'wp_widget_search',
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'wp_widget_recent_entries',
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'wp_widget_recent_entries_control',
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'wp_widget_tag_cloud',
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'wp_widget_tag_cloud_control',
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'wp_widget_categories',
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'wp_widget_categories_control',
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'wp_widget_text',
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'wp_widget_text_control',
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'wp_widget_rss',
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'wp_widget_rss_control',
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'wp_widget_recent_comments',
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'wp_widget_recent_comments_control'
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);
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/* Template tags & API functions */
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/**
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* Register a widget
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*
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* Registers a WP_Widget 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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* @see WP_Widget_Factory
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* @uses WP_Widget_Factory
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*
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* @param string $widget_class The name of a class that extends WP_Widget
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*/
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function register_widget($widget_class) {
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global $wp_widget_factory;
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$wp_widget_factory->register($widget_class);
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}
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/**
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* Unregister a widget
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*
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* Unregisters a WP_Widget widget. Useful for unregistering default widgets.
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* Run within a function hooked to the widgets_init action.
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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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* @see WP_Widget_Factory
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* @uses WP_Widget_Factory
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*
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* @param string $widget_class The name of a class that extends WP_Widget
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*/
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function unregister_widget($widget_class) {
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global $wp_widget_factory;
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$wp_widget_factory->unregister($widget_class);
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}
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/**
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* Creates multiple sidebars.
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*
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* If you wanted to quickly create multiple sidebars for a theme or internally.
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* This function will allow you to do so. If you don't pass the 'name' and/or
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* 'id' in $args, then they will be built for you.
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*
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* The default for the name is "Sidebar #", with '#' being replaced with the
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* number the sidebar is currently when greater than one. If first sidebar, the
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* name will be just "Sidebar". The default for id is "sidebar-" followed by the
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* number the sidebar creation is currently at. If the id is provided, and multiple
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* sidebars are being defined, the id will have "-2" appended, and so on.
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*
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* @since 2.2.0
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*
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* @see register_sidebar() The second parameter is documented by register_sidebar() and is the same here.
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* @uses parse_str() Converts a string to an array to be used in the rest of the function.
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* @uses register_sidebar() Sends single sidebar information [name, id] to this
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* function to handle building the sidebar.
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*
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* @param int $number Number of sidebars to create.
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* @param string|array $args Builds Sidebar based off of 'name' and 'id' values.
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*/
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function register_sidebars($number = 1, $args = array()) {
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global $wp_registered_sidebars;
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$number = (int) $number;
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if ( is_string($args) )
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parse_str($args, $args);
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for ( $i = 1; $i <= $number; $i++ ) {
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$_args = $args;
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if ( $number > 1 )
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$_args['name'] = isset($args['name']) ? sprintf($args['name'], $i) : sprintf(__('Sidebar %d'), $i);
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else
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$_args['name'] = isset($args['name']) ? $args['name'] : __('Sidebar');
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// Custom specified ID's are suffixed if they exist already.
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// Automatically generated sidebar names need to be suffixed regardless starting at -0
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if ( isset($args['id']) ) {
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$_args['id'] = $args['id'];
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$n = 2; // Start at -2 for conflicting custom ID's
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while ( isset($wp_registered_sidebars[$_args['id']]) )
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$_args['id'] = $args['id'] . '-' . $n++;
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} else {
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$n = count($wp_registered_sidebars);
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do {
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$_args['id'] = 'sidebar-' . ++$n;
|
|
} while ( isset($wp_registered_sidebars[$_args['id']]) );
|
|
}
|
|
register_sidebar($_args);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Builds the definition for a single sidebar and returns the ID.
|
|
*
|
|
* Accepts either a string or an array and then parses that against a set
|
|
* of default arguments for the new sidebar. WordPress will automatically
|
|
* generate a sidebar ID and name based on the current number of registered
|
|
* sidebars if those arguments are not included.
|
|
*
|
|
* When allowing for automatic generation of the name and ID parameters, keep
|
|
* in mind that the incrementor for your sidebar can change over time depending
|
|
* on what other plugins and themes are installed.
|
|
*
|
|
* If theme support for 'widgets' has not yet been added when this function is
|
|
* called, it will be automatically enabled through the use of add_theme_support()
|
|
*
|
|
* Arguments passed as a string should be separated by '&':
|
|
*
|
|
* e.g. 'name=Sidebar&id=my_prefix_sidebar'
|
|
*
|
|
* The same arguments passed as an array:
|
|
*
|
|
* array(
|
|
* 'name' => 'Sidebar',
|
|
* 'id' => 'my_prefix_sidebar',
|
|
* )
|
|
*
|
|
* Arguments:
|
|
* name - The name or title of the sidebar displayed in the admin dashboard.
|
|
* id - The unique identifier by which the sidebar will be called.
|
|
* before_widget - HTML content that will be prepended to each widget's HTML output
|
|
* when assigned to this sidebar.
|
|
* after_widget - HTML content that will be appended to each widget's HTML output
|
|
* when assigned to this sidebar.
|
|
* before_title - HTML content that will be prepended to the sidebar title when displayed.
|
|
* after_title - HTML content that will be appended to the sidebar title when displayed.
|
|
*
|
|
* @since 2.2.0
|
|
* @uses $wp_registered_sidebars Stores the new sidebar in this array by sidebar ID.
|
|
* @uses add_theme_support() to ensure widget support has been added.
|
|
*
|
|
* @param string|array $args Arguments for the sidebar being registered.
|
|
* @return string Sidebar ID added to $wp_registered_sidebars global.
|
|
*/
|
|
function register_sidebar($args = array()) {
|
|
global $wp_registered_sidebars;
|
|
|
|
$i = count($wp_registered_sidebars) + 1;
|
|
|
|
$defaults = array(
|
|
'name' => sprintf(__('Sidebar %d'), $i ),
|
|
'id' => "sidebar-$i",
|
|
'description' => '',
|
|
'class' => '',
|
|
'before_widget' => '<li id="%1$s" class="widget %2$s">',
|
|
'after_widget' => "</li>\n",
|
|
'before_title' => '<h2 class="widgettitle">',
|
|
'after_title' => "</h2>\n",
|
|
);
|
|
|
|
$sidebar = wp_parse_args( $args, $defaults );
|
|
|
|
$wp_registered_sidebars[$sidebar['id']] = $sidebar;
|
|
|
|
add_theme_support('widgets');
|
|
|
|
do_action( 'register_sidebar', $sidebar );
|
|
|
|
return $sidebar['id'];
|
|
}
|
|
|
|
/**
|
|
* Removes a sidebar from the list.
|
|
*
|
|
* @since 2.2.0
|
|
*
|
|
* @uses $wp_registered_sidebars Stores the new sidebar in this array by sidebar ID.
|
|
*
|
|
* @param string $name The ID of the sidebar when it was added.
|
|
*/
|
|
function unregister_sidebar( $name ) {
|
|
global $wp_registered_sidebars;
|
|
|
|
if ( isset( $wp_registered_sidebars[$name] ) )
|
|
unset( $wp_registered_sidebars[$name] );
|
|
}
|
|
|
|
/**
|
|
* Register widget for use in sidebars.
|
|
*
|
|
* The default widget option is 'classname' that can be override.
|
|
*
|
|
* The function can also be used to unregister widgets when $output_callback
|
|
* parameter is an empty string.
|
|
*
|
|
* @since 2.2.0
|
|
*
|
|
* @uses $wp_registered_widgets Uses stored registered widgets.
|
|
* @uses $wp_register_widget_defaults Retrieves widget defaults.
|
|
*
|
|
* @param int|string $id Widget ID.
|
|
* @param string $name Widget display title.
|
|
* @param callback $output_callback Run when widget is called.
|
|
* @param array|string $options Optional. Widget Options.
|
|
* @param mixed $params,... Widget parameters to add to widget.
|
|
* @return null Will return if $output_callback is empty after removing widget.
|
|
*/
|
|
function wp_register_sidebar_widget($id, $name, $output_callback, $options = array()) {
|
|
global $wp_registered_widgets, $wp_registered_widget_controls, $wp_registered_widget_updates, $_wp_deprecated_widgets_callbacks;
|
|
|
|
$id = strtolower($id);
|
|
|
|
if ( empty($output_callback) ) {
|
|
unset($wp_registered_widgets[$id]);
|
|
return;
|
|
}
|
|
|
|
$id_base = _get_widget_id_base($id);
|
|
if ( in_array($output_callback, $_wp_deprecated_widgets_callbacks, true) && !is_callable($output_callback) ) {
|
|
if ( isset($wp_registered_widget_controls[$id]) )
|
|
unset($wp_registered_widget_controls[$id]);
|
|
|
|
if ( isset($wp_registered_widget_updates[$id_base]) )
|
|
unset($wp_registered_widget_updates[$id_base]);
|
|
|
|
return;
|
|
}
|
|
|
|
$defaults = array('classname' => $output_callback);
|
|
$options = wp_parse_args($options, $defaults);
|
|
$widget = array(
|
|
'name' => $name,
|
|
'id' => $id,
|
|
'callback' => $output_callback,
|
|
'params' => array_slice(func_get_args(), 4)
|
|
);
|
|
$widget = array_merge($widget, $options);
|
|
|
|
if ( is_callable($output_callback) && ( !isset($wp_registered_widgets[$id]) || did_action( 'widgets_init' ) ) ) {
|
|
do_action( 'wp_register_sidebar_widget', $widget );
|
|
$wp_registered_widgets[$id] = $widget;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Retrieve description for widget.
|
|
*
|
|
* When registering widgets, the options can also include 'description' that
|
|
* describes the widget for display on the widget administration panel or
|
|
* in the theme.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @param int|string $id Widget ID.
|
|
* @return string Widget description, if available. Null on failure to retrieve description.
|
|
*/
|
|
function wp_widget_description( $id ) {
|
|
if ( !is_scalar($id) )
|
|
return;
|
|
|
|
global $wp_registered_widgets;
|
|
|
|
if ( isset($wp_registered_widgets[$id]['description']) )
|
|
return esc_html( $wp_registered_widgets[$id]['description'] );
|
|
}
|
|
|
|
/**
|
|
* Retrieve description for a sidebar.
|
|
*
|
|
* When registering sidebars a 'description' parameter can be included that
|
|
* describes the sidebar for display on the widget administration panel.
|
|
*
|
|
* @since 2.9.0
|
|
*
|
|
* @param int|string $id sidebar ID.
|
|
* @return string Sidebar description, if available. Null on failure to retrieve description.
|
|
*/
|
|
function wp_sidebar_description( $id ) {
|
|
if ( !is_scalar($id) )
|
|
return;
|
|
|
|
global $wp_registered_sidebars;
|
|
|
|
if ( isset($wp_registered_sidebars[$id]['description']) )
|
|
return esc_html( $wp_registered_sidebars[$id]['description'] );
|
|
}
|
|
|
|
/**
|
|
* Remove widget from sidebar.
|
|
*
|
|
* @since 2.2.0
|
|
*
|
|
* @param int|string $id Widget ID.
|
|
*/
|
|
function wp_unregister_sidebar_widget($id) {
|
|
do_action( 'wp_unregister_sidebar_widget', $id );
|
|
|
|
wp_register_sidebar_widget($id, '', '');
|
|
wp_unregister_widget_control($id);
|
|
}
|
|
|
|
/**
|
|
* Registers widget control callback for customizing options.
|
|
*
|
|
* The options contains the 'height', 'width', and 'id_base' keys. The 'height'
|
|
* option is never used. The 'width' option is the width of the fully expanded
|
|
* control form, but try hard to use the default width. The 'id_base' is for
|
|
* multi-widgets (widgets which allow multiple instances such as the text
|
|
* widget), an id_base must be provided. The widget id will end up looking like
|
|
* {$id_base}-{$unique_number}.
|
|
*
|
|
* @since 2.2.0
|
|
*
|
|
* @param int|string $id Sidebar ID.
|
|
* @param string $name Sidebar display name.
|
|
* @param callback $control_callback Run when sidebar is displayed.
|
|
* @param array|string $options Optional. Widget options. See above long description.
|
|
* @param mixed $params,... Optional. Additional parameters to add to widget.
|
|
*/
|
|
function wp_register_widget_control($id, $name, $control_callback, $options = array()) {
|
|
global $wp_registered_widget_controls, $wp_registered_widget_updates, $wp_registered_widgets, $_wp_deprecated_widgets_callbacks;
|
|
|
|
$id = strtolower($id);
|
|
$id_base = _get_widget_id_base($id);
|
|
|
|
if ( empty($control_callback) ) {
|
|
unset($wp_registered_widget_controls[$id]);
|
|
unset($wp_registered_widget_updates[$id_base]);
|
|
return;
|
|
}
|
|
|
|
if ( in_array($control_callback, $_wp_deprecated_widgets_callbacks, true) && !is_callable($control_callback) ) {
|
|
if ( isset($wp_registered_widgets[$id]) )
|
|
unset($wp_registered_widgets[$id]);
|
|
|
|
return;
|
|
}
|
|
|
|
if ( isset($wp_registered_widget_controls[$id]) && !did_action( 'widgets_init' ) )
|
|
return;
|
|
|
|
$defaults = array('width' => 250, 'height' => 200 ); // height is never used
|
|
$options = wp_parse_args($options, $defaults);
|
|
$options['width'] = (int) $options['width'];
|
|
$options['height'] = (int) $options['height'];
|
|
|
|
$widget = array(
|
|
'name' => $name,
|
|
'id' => $id,
|
|
'callback' => $control_callback,
|
|
'params' => array_slice(func_get_args(), 4)
|
|
);
|
|
$widget = array_merge($widget, $options);
|
|
|
|
$wp_registered_widget_controls[$id] = $widget;
|
|
|
|
if ( isset($wp_registered_widget_updates[$id_base]) )
|
|
return;
|
|
|
|
if ( isset($widget['params'][0]['number']) )
|
|
$widget['params'][0]['number'] = -1;
|
|
|
|
unset($widget['width'], $widget['height'], $widget['name'], $widget['id']);
|
|
$wp_registered_widget_updates[$id_base] = $widget;
|
|
}
|
|
|
|
function _register_widget_update_callback($id_base, $update_callback, $options = array()) {
|
|
global $wp_registered_widget_updates;
|
|
|
|
if ( isset($wp_registered_widget_updates[$id_base]) ) {
|
|
if ( empty($update_callback) )
|
|
unset($wp_registered_widget_updates[$id_base]);
|
|
return;
|
|
}
|
|
|
|
$widget = array(
|
|
'callback' => $update_callback,
|
|
'params' => array_slice(func_get_args(), 3)
|
|
);
|
|
|
|
$widget = array_merge($widget, $options);
|
|
$wp_registered_widget_updates[$id_base] = $widget;
|
|
}
|
|
|
|
function _register_widget_form_callback($id, $name, $form_callback, $options = array()) {
|
|
global $wp_registered_widget_controls;
|
|
|
|
$id = strtolower($id);
|
|
|
|
if ( empty($form_callback) ) {
|
|
unset($wp_registered_widget_controls[$id]);
|
|
return;
|
|
}
|
|
|
|
if ( isset($wp_registered_widget_controls[$id]) && !did_action( 'widgets_init' ) )
|
|
return;
|
|
|
|
$defaults = array('width' => 250, 'height' => 200 );
|
|
$options = wp_parse_args($options, $defaults);
|
|
$options['width'] = (int) $options['width'];
|
|
$options['height'] = (int) $options['height'];
|
|
|
|
$widget = array(
|
|
'name' => $name,
|
|
'id' => $id,
|
|
'callback' => $form_callback,
|
|
'params' => array_slice(func_get_args(), 4)
|
|
);
|
|
$widget = array_merge($widget, $options);
|
|
|
|
$wp_registered_widget_controls[$id] = $widget;
|
|
}
|
|
|
|
/**
|
|
* Remove control callback for widget.
|
|
*
|
|
* @since 2.2.0
|
|
* @uses wp_register_widget_control() Unregisters by using empty callback.
|
|
*
|
|
* @param int|string $id Widget ID.
|
|
*/
|
|
function wp_unregister_widget_control($id) {
|
|
return wp_register_widget_control($id, '', '');
|
|
}
|
|
|
|
/**
|
|
* Display dynamic sidebar.
|
|
*
|
|
* By default it displays the default sidebar or 'sidebar-1'. The 'sidebar-1' is
|
|
* not named by the theme, the actual name is '1', but 'sidebar-' is added to
|
|
* the registered sidebars for the name. If you named your sidebar 'after-post',
|
|
* then the parameter $index will still be 'after-post', but the lookup will be
|
|
* for 'sidebar-after-post'.
|
|
*
|
|
* It is confusing for the $index parameter, but just know that it should just
|
|
* work. When you register the sidebar in the theme, you will use the same name
|
|
* for this function or "Pay no heed to the man behind the curtain." Just accept
|
|
* it as an oddity of WordPress sidebar register and display.
|
|
*
|
|
* @since 2.2.0
|
|
*
|
|
* @param int|string $index Optional, default is 1. Name or ID of dynamic sidebar.
|
|
* @return bool True, if widget sidebar was found and called. False if not found or not called.
|
|
*/
|
|
function dynamic_sidebar($index = 1) {
|
|
global $wp_registered_sidebars, $wp_registered_widgets;
|
|
|
|
if ( is_int($index) ) {
|
|
$index = "sidebar-$index";
|
|
} else {
|
|
$index = sanitize_title($index);
|
|
foreach ( (array) $wp_registered_sidebars as $key => $value ) {
|
|
if ( sanitize_title($value['name']) == $index ) {
|
|
$index = $key;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
$sidebars_widgets = wp_get_sidebars_widgets();
|
|
if ( empty( $sidebars_widgets ) )
|
|
return false;
|
|
|
|
if ( empty($wp_registered_sidebars[$index]) || !array_key_exists($index, $sidebars_widgets) || !is_array($sidebars_widgets[$index]) || empty($sidebars_widgets[$index]) )
|
|
return false;
|
|
|
|
$sidebar = $wp_registered_sidebars[$index];
|
|
|
|
$did_one = false;
|
|
foreach ( (array) $sidebars_widgets[$index] as $id ) {
|
|
|
|
if ( !isset($wp_registered_widgets[$id]) ) continue;
|
|
|
|
$params = array_merge(
|
|
array( array_merge( $sidebar, array('widget_id' => $id, 'widget_name' => $wp_registered_widgets[$id]['name']) ) ),
|
|
(array) $wp_registered_widgets[$id]['params']
|
|
);
|
|
|
|
// Substitute HTML id and class attributes into before_widget
|
|
$classname_ = '';
|
|
foreach ( (array) $wp_registered_widgets[$id]['classname'] as $cn ) {
|
|
if ( is_string($cn) )
|
|
$classname_ .= '_' . $cn;
|
|
elseif ( is_object($cn) )
|
|
$classname_ .= '_' . get_class($cn);
|
|
}
|
|
$classname_ = ltrim($classname_, '_');
|
|
$params[0]['before_widget'] = sprintf($params[0]['before_widget'], $id, $classname_);
|
|
|
|
$params = apply_filters( 'dynamic_sidebar_params', $params );
|
|
|
|
$callback = $wp_registered_widgets[$id]['callback'];
|
|
|
|
do_action( 'dynamic_sidebar', $wp_registered_widgets[$id] );
|
|
|
|
if ( is_callable($callback) ) {
|
|
call_user_func_array($callback, $params);
|
|
$did_one = true;
|
|
}
|
|
}
|
|
|
|
return $did_one;
|
|
}
|
|
|
|
/**
|
|
* Whether widget is displayed on the front-end.
|
|
*
|
|
* Either $callback or $id_base can be used
|
|
* $id_base is the first argument when extending WP_Widget class
|
|
* Without the optional $widget_id parameter, returns the ID of the first sidebar
|
|
* in which the first instance of the widget with the given callback or $id_base is found.
|
|
* With the $widget_id parameter, returns the ID of the sidebar where
|
|
* the widget with that callback/$id_base AND that ID is found.
|
|
*
|
|
* NOTE: $widget_id and $id_base are the same for single widgets. To be effective
|
|
* this function has to run after widgets have initialized, at action 'init' or later.
|
|
*
|
|
* @since 2.2.0
|
|
*
|
|
* @param string $callback Optional, Widget callback to check.
|
|
* @param int $widget_id Optional, but needed for checking. Widget ID.
|
|
* @param string $id_base Optional, the base ID of a widget created by extending WP_Widget.
|
|
* @param bool $skip_inactive Optional, whether to check in 'wp_inactive_widgets'.
|
|
* @return mixed false if widget is not active or id of sidebar in which the widget is active.
|
|
*/
|
|
function is_active_widget($callback = false, $widget_id = false, $id_base = false, $skip_inactive = true) {
|
|
global $wp_registered_widgets;
|
|
|
|
$sidebars_widgets = wp_get_sidebars_widgets();
|
|
|
|
if ( is_array($sidebars_widgets) ) {
|
|
foreach ( $sidebars_widgets as $sidebar => $widgets ) {
|
|
if ( $skip_inactive && 'wp_inactive_widgets' == $sidebar )
|
|
continue;
|
|
|
|
if ( is_array($widgets) ) {
|
|
foreach ( $widgets as $widget ) {
|
|
if ( ( $callback && isset($wp_registered_widgets[$widget]['callback']) && $wp_registered_widgets[$widget]['callback'] == $callback ) || ( $id_base && _get_widget_id_base($widget) == $id_base ) ) {
|
|
if ( !$widget_id || $widget_id == $wp_registered_widgets[$widget]['id'] )
|
|
return $sidebar;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Whether the dynamic sidebar is enabled and used by theme.
|
|
*
|
|
* @since 2.2.0
|
|
*
|
|
* @return bool True, if using widgets. False, if not using widgets.
|
|
*/
|
|
function is_dynamic_sidebar() {
|
|
global $wp_registered_widgets, $wp_registered_sidebars;
|
|
$sidebars_widgets = get_option('sidebars_widgets');
|
|
foreach ( (array) $wp_registered_sidebars as $index => $sidebar ) {
|
|
if ( count($sidebars_widgets[$index]) ) {
|
|
foreach ( (array) $sidebars_widgets[$index] as $widget )
|
|
if ( array_key_exists($widget, $wp_registered_widgets) )
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Whether a sidebar is in use.
|
|
*
|
|
* @since 2.8
|
|
*
|
|
* @param mixed $index Sidebar name, id or number to check.
|
|
* @return bool true if the sidebar is in use, false otherwise.
|
|
*/
|
|
function is_active_sidebar( $index ) {
|
|
$index = ( is_int($index) ) ? "sidebar-$index" : sanitize_title($index);
|
|
$sidebars_widgets = wp_get_sidebars_widgets();
|
|
if ( !empty($sidebars_widgets[$index]) )
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/* Internal Functions */
|
|
|
|
/**
|
|
* Retrieve full list of sidebars and their widgets.
|
|
*
|
|
* Will upgrade sidebar widget list, if needed. Will also save updated list, if
|
|
* needed.
|
|
*
|
|
* @since 2.2.0
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* @access private
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*
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* @param bool $deprecated Not used (deprecated).
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* @return array Upgraded list of widgets to version 3 array format when called from the admin.
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*/
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function wp_get_sidebars_widgets($deprecated = true) {
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if ( $deprecated !== true )
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_deprecated_argument( __FUNCTION__, '2.8.1' );
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global $wp_registered_widgets, $_wp_sidebars_widgets, $sidebars_widgets;
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// If loading from front page, consult $_wp_sidebars_widgets rather than options
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// to see if wp_convert_widget_settings() has made manipulations in memory.
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if ( !is_admin() ) {
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if ( empty($_wp_sidebars_widgets) )
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$_wp_sidebars_widgets = get_option('sidebars_widgets', array());
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$sidebars_widgets = $_wp_sidebars_widgets;
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} else {
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$sidebars_widgets = get_option('sidebars_widgets', array());
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}
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if ( is_array( $sidebars_widgets ) && isset($sidebars_widgets['array_version']) )
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unset($sidebars_widgets['array_version']);
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$sidebars_widgets = apply_filters('sidebars_widgets', $sidebars_widgets);
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return $sidebars_widgets;
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}
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/**
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* Set the sidebar widget option to update sidebars.
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*
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* @since 2.2.0
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* @access private
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*
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* @param array $sidebars_widgets Sidebar widgets and their settings.
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*/
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function wp_set_sidebars_widgets( $sidebars_widgets ) {
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if ( !isset( $sidebars_widgets['array_version'] ) )
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$sidebars_widgets['array_version'] = 3;
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update_option( 'sidebars_widgets', $sidebars_widgets );
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}
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/**
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* Retrieve default registered sidebars list.
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*
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* @since 2.2.0
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* @access private
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*
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* @return array
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*/
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function wp_get_widget_defaults() {
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global $wp_registered_sidebars;
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$defaults = array();
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foreach ( (array) $wp_registered_sidebars as $index => $sidebar )
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$defaults[$index] = array();
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return $defaults;
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}
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/**
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* Convert the widget settings from single to multi-widget format.
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*
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* @since 2.8.0
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*
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* @return array
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*/
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function wp_convert_widget_settings($base_name, $option_name, $settings) {
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// This test may need expanding.
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$single = $changed = false;
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if ( empty($settings) ) {
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$single = true;
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} else {
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foreach ( array_keys($settings) as $number ) {
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if ( 'number' == $number )
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continue;
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if ( !is_numeric($number) ) {
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$single = true;
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break;
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}
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}
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}
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if ( $single ) {
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$settings = array( 2 => $settings );
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// If loading from the front page, update sidebar in memory but don't save to options
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if ( is_admin() ) {
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$sidebars_widgets = get_option('sidebars_widgets');
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} else {
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if ( empty($GLOBALS['_wp_sidebars_widgets']) )
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$GLOBALS['_wp_sidebars_widgets'] = get_option('sidebars_widgets', array());
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$sidebars_widgets = &$GLOBALS['_wp_sidebars_widgets'];
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}
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foreach ( (array) $sidebars_widgets as $index => $sidebar ) {
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if ( is_array($sidebar) ) {
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foreach ( $sidebar as $i => $name ) {
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if ( $base_name == $name ) {
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$sidebars_widgets[$index][$i] = "$name-2";
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$changed = true;
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break 2;
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}
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}
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}
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}
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if ( is_admin() && $changed )
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update_option('sidebars_widgets', $sidebars_widgets);
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}
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$settings['_multiwidget'] = 1;
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if ( is_admin() )
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update_option( $option_name, $settings );
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return $settings;
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}
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/**
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* Output an arbitrary widget as a template tag
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*
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* @since 2.8
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*
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* @param string $widget the widget's PHP class name (see default-widgets.php)
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* @param array $instance the widget's instance settings
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* @param array $args the widget's sidebar args
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* @return void
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**/
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function the_widget($widget, $instance = array(), $args = array()) {
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global $wp_widget_factory;
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$widget_obj = $wp_widget_factory->widgets[$widget];
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if ( !is_a($widget_obj, 'WP_Widget') )
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return;
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$before_widget = sprintf('<div class="widget %s">', $widget_obj->widget_options['classname'] );
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$default_args = array( 'before_widget' => $before_widget, 'after_widget' => "</div>", 'before_title' => '<h2 class="widgettitle">', 'after_title' => '</h2>' );
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$args = wp_parse_args($args, $default_args);
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$instance = wp_parse_args($instance);
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do_action( 'the_widget', $widget, $instance, $args );
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$widget_obj->_set(-1);
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$widget_obj->widget($args, $instance);
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}
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/**
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* Private
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*/
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function _get_widget_id_base($id) {
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return preg_replace( '/-[0-9]+$/', '', $id );
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}
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/**
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* Handle sidebars config after theme change
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*
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* @access private
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* @since 3.3.0
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*/
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function _wp_sidebars_changed() {
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global $sidebars_widgets;
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if ( ! is_array( $sidebars_widgets ) )
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$sidebars_widgets = wp_get_sidebars_widgets();
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retrieve_widgets(true);
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}
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// look for "lost" widgets, this has to run at least on each theme change
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function retrieve_widgets($theme_changed = false) {
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global $wp_registered_widget_updates, $wp_registered_sidebars, $sidebars_widgets, $wp_registered_widgets;
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$registered_sidebar_keys = array_keys( $wp_registered_sidebars );
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$orphaned = 0;
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$old_sidebars_widgets = get_theme_mod( 'sidebars_widgets' );
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if ( is_array( $old_sidebars_widgets ) ) {
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// time() that sidebars were stored is in $old_sidebars_widgets['time']
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$_sidebars_widgets = $old_sidebars_widgets['data'];
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remove_theme_mod( 'sidebars_widgets' );
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foreach ( $_sidebars_widgets as $sidebar => $widgets ) {
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if ( 'wp_inactive_widgets' == $sidebar || 'orphaned_widgets' == substr( $sidebar, 0, 16 ) )
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continue;
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if ( !in_array( $sidebar, $registered_sidebar_keys ) ) {
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$_sidebars_widgets['orphaned_widgets_' . ++$orphaned] = $widgets;
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unset( $_sidebars_widgets[$sidebar] );
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}
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}
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} else {
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if ( empty( $sidebars_widgets ) )
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return;
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unset( $sidebars_widgets['array_version'] );
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$old = array_keys($sidebars_widgets);
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sort($old);
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sort($registered_sidebar_keys);
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if ( $old == $registered_sidebar_keys )
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return;
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$_sidebars_widgets = array(
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'wp_inactive_widgets' => !empty( $sidebars_widgets['wp_inactive_widgets'] ) ? $sidebars_widgets['wp_inactive_widgets'] : array()
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);
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unset( $sidebars_widgets['wp_inactive_widgets'] );
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foreach ( $wp_registered_sidebars as $id => $settings ) {
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if ( $theme_changed ) {
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$_sidebars_widgets[$id] = array_shift( $sidebars_widgets );
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} else {
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// no theme change, grab only sidebars that are currently registered
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if ( isset( $sidebars_widgets[$id] ) ) {
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$_sidebars_widgets[$id] = $sidebars_widgets[$id];
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unset( $sidebars_widgets[$id] );
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}
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}
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}
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foreach ( $sidebars_widgets as $val ) {
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if ( is_array($val) && ! empty( $val ) )
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$_sidebars_widgets['orphaned_widgets_' . ++$orphaned] = $val;
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}
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}
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// discard invalid, theme-specific widgets from sidebars
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$shown_widgets = array();
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foreach ( $_sidebars_widgets as $sidebar => $widgets ) {
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if ( !is_array($widgets) )
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continue;
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$_widgets = array();
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foreach ( $widgets as $widget ) {
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if ( isset($wp_registered_widgets[$widget]) )
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$_widgets[] = $widget;
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}
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$_sidebars_widgets[$sidebar] = $_widgets;
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$shown_widgets = array_merge($shown_widgets, $_widgets);
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}
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$sidebars_widgets = $_sidebars_widgets;
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unset($_sidebars_widgets, $_widgets);
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// find hidden/lost multi-widget instances
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$lost_widgets = array();
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foreach ( $wp_registered_widgets as $key => $val ) {
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if ( in_array($key, $shown_widgets, true) )
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continue;
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$number = preg_replace('/.+?-([0-9]+)$/', '$1', $key);
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if ( 2 > (int) $number )
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continue;
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$lost_widgets[] = $key;
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}
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$sidebars_widgets['wp_inactive_widgets'] = array_merge($lost_widgets, (array) $sidebars_widgets['wp_inactive_widgets']);
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wp_set_sidebars_widgets($sidebars_widgets);
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return $sidebars_widgets;
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}
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