WordPressを読む　68-1 /blog/wp-includes/widgets.php 1

2014/12/04 2015/04/24

/blog/wp-includes/widgets.php1

WP_Widget::

<?php
/**
 * API for creating dynamic sidebar without hardcoding functionality into
 * themes. Includes both internal WordPress routines and theme use routines.
 *
 * This functionality was found in a plugin before WordPress 2.2 release which
 * included it in the core from that point on.
 *
 * @link http://codex.wordpress.org/Plugins/WordPress_Widgets WordPress Widgets
 * @link http://codex.wordpress.org/Plugins/WordPress_Widgets_Api Widgets API
 *
 * @package WordPress
 * @subpackage Widgets
 */

/**
 * This class must be extended for each widget and WP_Widget::widget(), WP_Widget::update()
 * and WP_Widget::form() need to be over-ridden.
 *
 * @package WordPress
 * @subpackage Widgets
 * @since 2.8.0
 */
class WP_Widget {

	public $id_base;			// Root id for all widgets of this type.
	public $name;				// Name for this widget type.
	public $widget_options;	// Option array passed to wp_register_sidebar_widget()
	public $control_options;	// Option array passed to wp_register_widget_control()

	public $number = false;	// Unique ID number of the current instance.
	public $id = false;		// Unique ID string of the current instance (id_base-number)
	public $updated = false;	// Set true when we update the data after a POST submit - makes sure we don't do it twice.

<?php

/**

* API for creating dynamic sidebar without hardcoding functionality into

* themes. Includes both internal WordPress routines and theme use routines.

* This functionality was found in a plugin before WordPress 2.2 release which

* included it in the core from that point on.

* @link http://codex.wordpress.org/Plugins/WordPress_Widgets WordPress Widgets

* @link http://codex.wordpress.org/Plugins/WordPress_Widgets_Api Widgets API

* @package WordPress

* @subpackage Widgets

/**

* This class must be extended for each widget and WP_Widget::widget(), WP_Widget::update()

* and WP_Widget::form() need to be over-ridden.

* @package WordPress

* @subpackage Widgets

* @since 2.8.0

class WP_Widget {

public $id_base; // Root id for all widgets of this type.

public $name; // Name for this widget type.

public $widget_options; // Option array passed to wp_register_sidebar_widget()

public $control_options; // Option array passed to wp_register_widget_control()

public $number = false; // Unique ID number of the current instance.

public $id = false; // Unique ID string of the current instance (id_base-number)

public $updated = false; // Set true when we update the data after a POST submit - makes sure we don't do it twice.

WP_Widget::widget()

	// Member functions that you must over-ride.
	/** Echo the widget content.
	 *
	 * Subclasses should over-ride this function to generate their widget code.
	 *
	 * @param array $args Display arguments including before_title, after_title, before_widget, and after_widget.
	 * @param array $instance The settings for the particular instance of the widget
	 */
	public function widget($args, $instance) {
		die('function WP_Widget::widget() must be over-ridden in a sub-class.');
	}

// Member functions that you must over-ride.

/** Echo the widget content.

* Subclasses should over-ride this function to generate their widget code.

* @param array $args Display arguments including before_title, after_title, before_widget, and after_widget.

* @param array $instance The settings for the particular instance of the widget

public function widget($args, $instance) {

die('function WP_Widget::widget() must be over-ridden in a sub-class.');

}

WP_Widget::update()

	/** Update a particular instance.
	 *
	 * This function should check that $new_instance is set correctly.
	 * The newly calculated value of $instance should be returned.
	 * If "false" is returned, the instance won't be saved/updated.
	 *
	 * @param array $new_instance New settings for this instance as input by the user via form()
	 * @param array $old_instance Old settings for this instance
	 * @return array Settings to save or bool false to cancel saving
	 */
	public function update($new_instance, $old_instance) {
		return $new_instance;
	}

/** Update a particular instance.

* This function should check that $new_instance is set correctly.

* The newly calculated value of $instance should be returned.

* If "false" is returned, the instance won't be saved/updated.

* @param array $new_instance New settings for this instance as input by the user via form()

* @param array $old_instance Old settings for this instance

* @return array Settings to save or bool false to cancel saving

public function update($new_instance, $old_instance) {

return $new_instance;

}

WP_Widget::form()

	/** Echo the settings update form
	 *
	 * @param array $instance Current settings
	 */
	public function form($instance) {
		echo '<p class="no-options-widget">' . __('There are no options for this widget.') . '</p>';
		return 'noform';
	}

/** Echo the settings update form

* @param array $instance Current settings

public function form($instance) {

echo '<p class="no-options-widget">' . __('There are no options for this widget.') . '</p>';

return 'noform';

}

WP_Widget::__construct()

	// Functions you'll need to call.

	/**
	 * PHP5 constructor
	 *
	 * @param string $id_base Optional Base ID for the widget, lower case,
	 * if left empty a portion of the widget's class name will be used. Has to be unique.
	 * @param string $name Name for the widget displayed on the configuration page.
	 * @param array $widget_options Optional Passed to wp_register_sidebar_widget()
	 *	 - description: shown on the configuration page
	 *	 - classname
	 * @param array $control_options Optional Passed to wp_register_widget_control()
	 *	 - width: required if more than 250px
	 *	 - height: currently not used but may be needed in the future
	 */
	public function __construct( $id_base, $name, $widget_options = array(), $control_options = array() ) {
		$this->id_base = empty($id_base) ? preg_replace( '/(wp_)?widget_/', '', strtolower(get_class($this)) ) : strtolower($id_base);
		$this->name = $name;
		$this->option_name = 'widget_' . $this->id_base;
		$this->widget_options = wp_parse_args( $widget_options, array('classname' => $this->option_name) );
		$this->control_options = wp_parse_args( $control_options, array('id_base' => $this->id_base) );
	}

// Functions you'll need to call.

/**

* PHP5 constructor

* @param string $id_base Optional Base ID for the widget, lower case,

* if left empty a portion of the widget's class name will be used. Has to be unique.

* @param string $name Name for the widget displayed on the configuration page.

* @param array $widget_options Optional Passed to wp_register_sidebar_widget()

* - description: shown on the configuration page

* - classname

* @param array $control_options Optional Passed to wp_register_widget_control()

* - width: required if more than 250px

* - height: currently not used but may be needed in the future

public function __construct( $id_base, $name, $widget_options = array(), $control_options = array() ) {

$this->id_base = empty($id_base) ? preg_replace( '/(wp_)?widget_/', '', strtolower(get_class($this)) ) : strtolower($id_base);

$this->name = $name;

$this->option_name = 'widget_' . $this->id_base;

$this->widget_options = wp_parse_args( $widget_options, array('classname' => $this->option_name) );

$this->control_options = wp_parse_args( $control_options, array('id_base' => $this->id_base) );

}

WP_Widget::WP_Widget()

	/**
	 * PHP4 constructor
	 */
	public function WP_Widget( $id_base, $name, $widget_options = array(), $control_options = array() ) {
		WP_Widget::__construct( $id_base, $name, $widget_options, $control_options );
	}

/**

* PHP4 constructor

public function WP_Widget( $id_base, $name, $widget_options = array(), $control_options = array() ) {

WP_Widget::__construct( $id_base, $name, $widget_options, $control_options );

}

WP_Widget::get_field_name()

	/**
	 * Constructs name attributes for use in form() fields
	 *
	 * This function should be used in form() methods to create name attributes for fields to be saved by update()
	 *
	 * @param string $field_name Field name
	 * @return string Name attribute for $field_name
	 */
	public function get_field_name($field_name) {
		return 'widget-' . $this->id_base . '[' . $this->number . '][' . $field_name . ']';
	}

/**

* Constructs name attributes for use in form() fields

* This function should be used in form() methods to create name attributes for fields to be saved by update()

* @param string $field_name Field name

* @return string Name attribute for $field_name

public function get_field_name($field_name) {

return 'widget-' . $this->id_base . '[' . $this->number . '][' . $field_name . ']';

}

WP_Widget::get_field_id()

	/**
	 * Constructs id attributes for use in form() fields
	 *
	 * This function should be used in form() methods to create id attributes for fields to be saved by update()
	 *
	 * @param string $field_name Field name
	 * @return string ID attribute for $field_name
	 */
	public function get_field_id($field_name) {
		return 'widget-' . $this->id_base . '-' . $this->number . '-' . $field_name;
	}

/**

* Constructs id attributes for use in form() fields

* This function should be used in form() methods to create id attributes for fields to be saved by update()

* @param string $field_name Field name

* @return string ID attribute for $field_name

public function get_field_id($field_name) {

return 'widget-' . $this->id_base . '-' . $this->number . '-' . $field_name;

}

WP_Widget::_register()

	// Private Functions. Don't worry about these.

	public function _register() {
		$settings = $this->get_settings();
		$empty = true;

		if ( is_array($settings) ) {
			foreach ( array_keys($settings) as $number ) {
				if ( is_numeric($number) ) {
					$this->_set($number);
					$this->_register_one($number);
					$empty = false;
				}
			}
		}

		if ( $empty ) {
			// If there are none, we register the widget's existence with a
			// generic template
			$this->_set(1);
			$this->_register_one();
		}
	}

// Private Functions. Don't worry about these.

public function _register() {

$settings = $this->get_settings();

$empty = true;

if ( is_array($settings) ) {

foreach ( array_keys($settings) as $number ) {

if ( is_numeric($number) ) {

$this->_set($number);

$this->_register_one($number);

$empty = false;

}

if ( $empty ) {

// If there are none, we register the widget's existence with a

// generic template

$this->_set(1);

$this->_register_one();

}

WP_Widget::_set()

	public function _set($number) {
		$this->number = $number;
		$this->id = $this->id_base . '-' . $number;
	}

public function _set($number) {

$this->number = $number;

$this->id = $this->id_base . '-' . $number;

}

WP_Widget::_get_display_callback()

	public function _get_display_callback() {
		return array($this, 'display_callback');
	}

public function _get_display_callback() {

return array($this, 'display_callback');

}

WP_Widget::_get_update_callback()

	public function _get_update_callback() {
		return array($this, 'update_callback');
	}

public function _get_update_callback() {

return array($this, 'update_callback');

}

WP_Widget::_get_form_callback()

	public function _get_form_callback() {
		return array($this, 'form_callback');
	}

public function _get_form_callback() {

return array($this, 'form_callback');

}

WP_Widget::is_preview()

	/**
	 * Determine if we're in the Customizer; if true, then the object cache gets
	 * suspended and widgets should check this to decide whether they should
	 * store anything persistently to the object cache, to transients, or
	 * anywhere else.
	 *
	 * @since 3.9.0
	 *
	 * @return bool True if Customizer is on, false if not.
	 */
	public function is_preview() {
		global $wp_customize;
		return ( isset( $wp_customize ) && $wp_customize->is_preview() ) ;
	}

/**

* Determine if we're in the Customizer; if true, then the object cache gets

* suspended and widgets should check this to decide whether they should

* store anything persistently to the object cache, to transients, or

* anywhere else.

* @since 3.9.0

* @return bool True if Customizer is on, false if not.

public function is_preview() {

global $wp_customize;

return ( isset( $wp_customize ) && $wp_customize->is_preview() ) ;

}

WP_Widget::display_callback()

	/** Generate the actual widget content.
	 *	Just finds the instance and calls widget().
	 *	Do NOT over-ride this function. */
	public function display_callback( $args, $widget_args = 1 ) {
		if ( is_numeric($widget_args) )
			$widget_args = array( 'number' => $widget_args );

		$widget_args = wp_parse_args( $widget_args, array( 'number' => -1 ) );
		$this->_set( $widget_args['number'] );
		$instance = $this->get_settings();

		if ( array_key_exists( $this->number, $instance ) ) {
			$instance = $instance[$this->number];

			/**
			 * Filter the settings for a particular widget instance.
			 *
			 * Returning false will effectively short-circuit display of the widget.
			 *
			 * @since 2.8.0
			 *
			 * @param array     $instance The current widget instance's settings.
			 * @param WP_Widget $this     The current widget instance.
			 * @param array     $args     An array of default widget arguments.
			 */
			$instance = apply_filters( 'widget_display_callback', $instance, $this, $args );

			if ( false === $instance ) {
				return;
			}

			$was_cache_addition_suspended = wp_suspend_cache_addition();
			if ( $this->is_preview() && ! $was_cache_addition_suspended ) {
				wp_suspend_cache_addition( true );
			}

			$this->widget( $args, $instance );

			if ( $this->is_preview() ) {
				wp_suspend_cache_addition( $was_cache_addition_suspended );
			}
		}
	}

/** Generate the actual widget content.

* Just finds the instance and calls widget().

* Do NOT over-ride this function. */

public function display_callback( $args, $widget_args = 1 ) {

if ( is_numeric($widget_args) )

$widget_args = array( 'number' => $widget_args );

$widget_args = wp_parse_args( $widget_args, array( 'number' => -1 ) );

$this->_set( $widget_args['number'] );

$instance = $this->get_settings();

if ( array_key_exists( $this->number, $instance ) ) {

$instance = $instance[$this->number];

/**

* Filter the settings for a particular widget instance.

* Returning false will effectively short-circuit display of the widget.

* @since 2.8.0

* @param array $instance The current widget instance's settings.

* @param WP_Widget $this The current widget instance.

* @param array $args An array of default widget arguments.

$instance = apply_filters( 'widget_display_callback', $instance, $this, $args );

if ( false === $instance ) {

return;

}

$was_cache_addition_suspended = wp_suspend_cache_addition();

if ( $this->is_preview() && ! $was_cache_addition_suspended ) {

wp_suspend_cache_addition( true );

}

$this->widget( $args, $instance );

if ( $this->is_preview() ) {

wp_suspend_cache_addition( $was_cache_addition_suspended );

}

WP_Widget::update_callback()

	/**
	 * Deal with changed settings.
	 *
	 * Do NOT over-ride this function.
	 *
	 * @param mixed $deprecated Not used.
	 */
	public function update_callback( $deprecated = 1 ) {
		global $wp_registered_widgets;

		$all_instances = $this->get_settings();

		// We need to update the data
		if ( $this->updated )
			return;

		if ( isset($_POST['delete_widget']) && $_POST['delete_widget'] ) {
			// Delete the settings for this instance of the widget
			if ( isset($_POST['the-widget-id']) )
				$del_id = $_POST['the-widget-id'];
			else
				return;

			if ( isset($wp_registered_widgets[$del_id]['params'][0]['number']) ) {
				$number = $wp_registered_widgets[$del_id]['params'][0]['number'];

				if ( $this->id_base . '-' . $number == $del_id )
					unset($all_instances[$number]);
			}
		} else {
			if ( isset($_POST['widget-' . $this->id_base]) && is_array($_POST['widget-' . $this->id_base]) ) {
				$settings = $_POST['widget-' . $this->id_base];
			} elseif ( isset($_POST['id_base']) && $_POST['id_base'] == $this->id_base ) {
				$num = $_POST['multi_number'] ? (int) $_POST['multi_number'] : (int) $_POST['widget_number'];
				$settings = array( $num => array() );
			} else {
				return;
			}

			foreach ( $settings as $number => $new_instance ) {
				$new_instance = stripslashes_deep($new_instance);
				$this->_set($number);

				$old_instance = isset($all_instances[$number]) ? $all_instances[$number] : array();

				$was_cache_addition_suspended = wp_suspend_cache_addition();
				if ( $this->is_preview() && ! $was_cache_addition_suspended ) {
					wp_suspend_cache_addition( true );
				}

				$instance = $this->update( $new_instance, $old_instance );

				if ( $this->is_preview() ) {
					wp_suspend_cache_addition( $was_cache_addition_suspended );
				}

				/**
				 * Filter a widget's settings before saving.
				 *
				 * Returning false will effectively short-circuit the widget's ability
				 * to update settings.
				 *
				 * @since 2.8.0
				 *
				 * @param array     $instance     The current widget instance's settings.
				 * @param array     $new_instance Array of new widget settings.
				 * @param array     $old_instance Array of old widget settings.
				 * @param WP_Widget $this         The current widget instance.
				 */
				$instance = apply_filters( 'widget_update_callback', $instance, $new_instance, $old_instance, $this );
				if ( false !== $instance ) {
					$all_instances[$number] = $instance;
				}

				break; // run only once
			}
		}

		$this->save_settings($all_instances);
		$this->updated = true;
	}

/**

* Deal with changed settings.

* Do NOT over-ride this function.

* @param mixed $deprecated Not used.

public function update_callback( $deprecated = 1 ) {

global $wp_registered_widgets;

$all_instances = $this->get_settings();

// We need to update the data

if ( $this->updated )

return;

if ( isset($_POST['delete_widget']) && $_POST['delete_widget'] ) {

// Delete the settings for this instance of the widget

if ( isset($_POST['the-widget-id']) )

$del_id = $_POST['the-widget-id'];

else

return;

if ( isset($wp_registered_widgets[$del_id]['params'][0]['number']) ) {

$number = $wp_registered_widgets[$del_id]['params'][0]['number'];

if ( $this->id_base . '-' . $number == $del_id )

unset($all_instances[$number]);

}

} else {

if ( isset($_POST['widget-' . $this->id_base]) && is_array($_POST['widget-' . $this->id_base]) ) {

$settings = $_POST['widget-' . $this->id_base];

} elseif ( isset($_POST['id_base']) && $_POST['id_base'] == $this->id_base ) {

$num = $_POST['multi_number'] ? (int) $_POST['multi_number'] : (int) $_POST['widget_number'];

$settings = array( $num => array() );

} else {

return;

}

foreach ( $settings as $number => $new_instance ) {

$new_instance = stripslashes_deep($new_instance);

$this->_set($number);

$old_instance = isset($all_instances[$number]) ? $all_instances[$number] : array();

$was_cache_addition_suspended = wp_suspend_cache_addition();

if ( $this->is_preview() && ! $was_cache_addition_suspended ) {

wp_suspend_cache_addition( true );

}

$instance = $this->update( $new_instance, $old_instance );

if ( $this->is_preview() ) {

wp_suspend_cache_addition( $was_cache_addition_suspended );

}

/**

* Filter a widget's settings before saving.

* Returning false will effectively short-circuit the widget's ability

* to update settings.

* @since 2.8.0

* @param array $instance The current widget instance's settings.

* @param array $new_instance Array of new widget settings.

* @param array $old_instance Array of old widget settings.

* @param WP_Widget $this The current widget instance.

$instance = apply_filters( 'widget_update_callback', $instance, $new_instance, $old_instance, $this );

if ( false !== $instance ) {

$all_instances[$number] = $instance;

}

break; // run only once

}

$this->save_settings($all_instances);

$this->updated = true;

}

WP_Widget::form_callback()

	/**
	 * Generate the control form.
	 *
	 * Do NOT over-ride this function.
	 */
	public function form_callback( $widget_args = 1 ) {
		if ( is_numeric($widget_args) )
			$widget_args = array( 'number' => $widget_args );

		$widget_args = wp_parse_args( $widget_args, array( 'number' => -1 ) );
		$all_instances = $this->get_settings();

		if ( -1 == $widget_args['number'] ) {
			// We echo out a form where 'number' can be set later
			$this->_set('__i__');
			$instance = array();
		} else {
			$this->_set($widget_args['number']);
			$instance = $all_instances[ $widget_args['number'] ];
		}

		/**
		 * Filter the widget instance's settings before displaying the control form.
		 *
		 * Returning false effectively short-circuits display of the control form.
		 *
		 * @since 2.8.0
		 *
		 * @param array     $instance The current widget instance's settings.
		 * @param WP_Widget $this     The current widget instance.
		 */
		$instance = apply_filters( 'widget_form_callback', $instance, $this );

		$return = null;
		if ( false !== $instance ) {
			$return = $this->form($instance);

			/**
			 * Fires at the end of the widget control form.
			 *
			 * Use this hook to add extra fields to the widget form. The hook
			 * is only fired if the value passed to the 'widget_form_callback'
			 * hook is not false.
			 *
			 * Note: If the widget has no form, the text echoed from the default
			 * form method can be hidden using CSS.
			 *
			 * @since 2.8.0
			 *
			 * @param WP_Widget $this     The widget instance, passed by reference.
			 * @param null      $return   Return null if new fields are added.
			 * @param array     $instance An array of the widget's settings.
			 */
			do_action_ref_array( 'in_widget_form', array( &$this, &$return, $instance ) );
		}
		return $return;
	}

/**

* Generate the control form.

* Do NOT over-ride this function.

public function form_callback( $widget_args = 1 ) {

if ( is_numeric($widget_args) )

$widget_args = array( 'number' => $widget_args );

$widget_args = wp_parse_args( $widget_args, array( 'number' => -1 ) );

$all_instances = $this->get_settings();

if ( -1 == $widget_args['number'] ) {

// We echo out a form where 'number' can be set later

$this->_set('__i__');

$instance = array();

} else {

$this->_set($widget_args['number']);

$instance = $all_instances[ $widget_args['number'] ];

}

/**

* Filter the widget instance's settings before displaying the control form.

* Returning false effectively short-circuits display of the control form.

* @since 2.8.0

* @param array $instance The current widget instance's settings.

* @param WP_Widget $this The current widget instance.

$instance = apply_filters( 'widget_form_callback', $instance, $this );

$return = null;

if ( false !== $instance ) {

$return = $this->form($instance);

/**

* Fires at the end of the widget control form.

* Use this hook to add extra fields to the widget form. The hook

* is only fired if the value passed to the 'widget_form_callback'

* hook is not false.

* Note: If the widget has no form, the text echoed from the default

* form method can be hidden using CSS.

* @since 2.8.0

* @param WP_Widget $this The widget instance, passed by reference.

* @param null $return Return null if new fields are added.

* @param array $instance An array of the widget's settings.

do_action_ref_array( 'in_widget_form', array( &$this, &$return, $instance ) );

}

return $return;

}

WP_Widget::_register_one()

	/** Helper function: Registers a single instance. */
	public function _register_one($number = -1) {
		wp_register_sidebar_widget(	$this->id, $this->name,	$this->_get_display_callback(), $this->widget_options, array( 'number' => $number ) );
		_register_widget_update_callback( $this->id_base, $this->_get_update_callback(), $this->control_options, array( 'number' => -1 ) );
		_register_widget_form_callback(	$this->id, $this->name,	$this->_get_form_callback(), $this->control_options, array( 'number' => $number ) );
	}

/** Helper function: Registers a single instance. */

public function _register_one($number = -1) {

wp_register_sidebar_widget( $this->id, $this->name, $this->_get_display_callback(), $this->widget_options, array( 'number' => $number ) );

_register_widget_update_callback( $this->id_base, $this->_get_update_callback(), $this->control_options, array( 'number' => -1 ) );

_register_widget_form_callback( $this->id, $this->name, $this->_get_form_callback(), $this->control_options, array( 'number' => $number ) );

}

WP_Widget::save_settings()

	public function save_settings($settings) {
		$settings['_multiwidget'] = 1;
		update_option( $this->option_name, $settings );
	}

public function save_settings($settings) {

$settings['_multiwidget'] = 1;

update_option( $this->option_name, $settings );

}

WP_Widget::get_settings()

	public function get_settings() {
		$settings = get_option($this->option_name);

		if ( false === $settings && isset($this->alt_option_name) )
			$settings = get_option($this->alt_option_name);

		if ( !is_array($settings) )
			$settings = array();

		if ( !empty($settings) && !array_key_exists('_multiwidget', $settings) ) {
			// old format, convert if single widget
			$settings = wp_convert_widget_settings($this->id_base, $this->option_name, $settings);
		}

		unset($settings['_multiwidget'], $settings['__i__']);
		return $settings;
	}
}

public function get_settings() {

$settings = get_option($this->option_name);

if ( false === $settings && isset($this->alt_option_name) )

$settings = get_option($this->alt_option_name);

if ( !is_array($settings) )

$settings = array();

if ( !empty($settings) && !array_key_exists('_multiwidget', $settings) ) {

// old format, convert if single widget

$settings = wp_convert_widget_settings($this->id_base, $this->option_name, $settings);

}

unset($settings['_multiwidget'], $settings['__i__']);

return $settings;

}

WP_Widget::クラス終了

WP_Widget_Factory::

/**
 * Singleton that registers and instantiates WP_Widget classes.
 *
 * @package WordPress
 * @subpackage Widgets
 * @since 2.8.0
 */
class WP_Widget_Factory {
	public $widgets = array();

/**

* Singleton that registers and instantiates WP_Widget classes.

* @package WordPress

* @subpackage Widgets

* @since 2.8.0

class WP_Widget_Factory {

public $widgets = array();

WP_Widget_Factory::WP_Widget_Factory()

	public function WP_Widget_Factory() {
		add_action( 'widgets_init', array( $this, '_register_widgets' ), 100 );
	}

public function WP_Widget_Factory() {

add_action( 'widgets_init', array( $this, '_register_widgets' ), 100 );

}

WP_Widget_Factory::register()

	public function register($widget_class) {
		$this->widgets[$widget_class] = new $widget_class();
	}

public function register($widget_class) {

$this->widgets[$widget_class] = new $widget_class();

}

WP_Widget_Factory::unregister()

	public function unregister($widget_class) {
		if ( isset($this->widgets[$widget_class]) )
			unset($this->widgets[$widget_class]);
	}

public function unregister($widget_class) {

if ( isset($this->widgets[$widget_class]) )

unset($this->widgets[$widget_class]);

}

WP_Widget_Factory::_register_widgets()

	public function _register_widgets() {
		global $wp_registered_widgets;
		$keys = array_keys($this->widgets);
		$registered = array_keys($wp_registered_widgets);
		$registered = array_map('_get_widget_id_base', $registered);

		foreach ( $keys as $key ) {
			// don't register new widget if old widget with the same id is already registered
			if ( in_array($this->widgets[$key]->id_base, $registered, true) ) {
				unset($this->widgets[$key]);
				continue;
			}

			$this->widgets[$key]->_register();
		}
	}
}

public function _register_widgets() {

global $wp_registered_widgets;

$keys = array_keys($this->widgets);

$registered = array_keys($wp_registered_widgets);

$registered = array_map('_get_widget_id_base', $registered);

foreach ( $keys as $key ) {

// don't register new widget if old widget with the same id is already registered

if ( in_array($this->widgets[$key]->id_base, $registered, true) ) {

unset($this->widgets[$key]);

continue;

}

$this->widgets[$key]->_register();

}

WP_Widget_Factory::クラス定義終了

- Wordpress

WordPressを読む　71 /blog/wp-includes/admin-bar.php

<?php
/**
 * Admin Bar
 *
 * This code handles the building and rendering of the press bar.
 */

/**
 * Instantiate the admin bar object and set it up as a global for access elsewhere.
 *
 * UNHOOKING THIS FUNCTION WILL NOT PROPERLY REMOVE THE ADMIN BAR.
 * For that, use show_admin_bar(false) or the 'show_admin_bar' filter.
 *
 * @since 3.1.0
 * @access private
 * @return bool Whether the admin bar was successfully initialized.
 */
function _wp_admin_bar_init() {
	global $wp_admin_bar;

	if ( ! is_admin_bar_showing() )
		return false;

	/* Load the admin bar class code ready for instantiation */
	require( ABSPATH . WPINC . '/class-wp-admin-bar.php' );

	/* Instantiate the admin bar */

	/**
	 * Filter the admin bar class to instantiate.
	 *
	 * @since 3.1.0
	 *
	 * @param string $wp_admin_bar_class Admin bar class to use. Default 'WP_Admin_Bar'.
	 */
	$admin_bar_class = apply_filters( 'wp_admin_bar_class', 'WP_Admin_Bar' );
	if ( class_exists( $admin_bar_class ) )
		$wp_admin_bar = new $admin_bar_class;
	else
		return false;

	$wp_admin_bar->initialize();
	$wp_admin_bar->add_menus();

	return true;
}
// Don't remove. Wrong way to disable.
add_action( 'template_redirect', '_wp_admin_bar_init', 0 );
add_action( 'admin_init', '_wp_admin_bar_init' );

/**
 * Render the admin bar to the page based on the $wp_admin_bar->menu member var.
 * This is called very late on the footer actions so that it will render after anything else being
 * added to the footer.
 *
 * It includes the action "admin_bar_menu" which should be used to hook in and
 * add new menus to the admin bar. That way you can be sure that you are adding at most optimal point,
 * right before the admin bar is rendered. This also gives you access to the $post global, among others.
 *
 * @since 3.1.0
 */
function wp_admin_bar_render() {
	global $wp_admin_bar;

	if ( ! is_admin_bar_showing() || ! is_object( $wp_admin_bar ) )
		return false;

	/**
	 * Load all necessary admin bar items.
	 *
	 * This is the hook used to add, remove, or manipulate admin bar items.
	 *
	 * @since 3.1.0
	 *
	 * @param WP_Admin_Bar $wp_admin_bar WP_Admin_Bar instance, passed by reference
	 */
	do_action_ref_array( 'admin_bar_menu', array( &$wp_admin_bar ) );

	/**
	 * Fires before the admin bar is rendered.
	 *
	 * @since 3.1.0
	 */
	do_action( 'wp_before_admin_bar_render' );

	$wp_admin_bar->render();

	/**
	 * Fires after the admin bar is rendered.
	 *
	 * @since 3.1.0
	 */
	do_action( 'wp_after_admin_bar_render' );
}
add_action( 'wp_footer', 'wp_admin_bar_render', 1000 );
add_action( 'in_admin_header', 'wp_admin_bar_render', 0 );

/**
 * Add the WordPress logo menu.
 *
 * @since 3.3.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_wp_menu( $wp_admin_bar ) {
	$wp_admin_bar->add_menu( array(
		'id'    => 'wp-logo',
		'title' => '<span class="ab-icon"></span>',
		'href'  => self_admin_url( 'about.php' ),
		'meta'  => array(
			'title' => __('About WordPress'),
		),
	) );

	if ( is_user_logged_in() ) {
		// Add "About WordPress" link
		$wp_admin_bar->add_menu( array(
			'parent' => 'wp-logo',
			'id'     => 'about',
			'title'  => __('About WordPress'),
			'href'  => self_admin_url( 'about.php' ),
		) );
	}

	// Add WordPress.org link
	$wp_admin_bar->add_menu( array(
		'parent'    => 'wp-logo-external',
		'id'        => 'wporg',
		'title'     => __('WordPress.org'),
		'href'      => __('https://wordpress.org/'),
	) );

	// Add codex link
	$wp_admin_bar->add_menu( array(
		'parent'    => 'wp-logo-external',
		'id'        => 'documentation',
		'title'     => __('Documentation'),
		'href'      => __('http://codex.wordpress.org/'),
	) );

	// Add forums link
	$wp_admin_bar->add_menu( array(
		'parent'    => 'wp-logo-external',
		'id'        => 'support-forums',
		'title'     => __('Support Forums'),
		'href'      => __('https://wordpress.org/support/'),
	) );

	// Add feedback link
	$wp_admin_bar->add_menu( array(
		'parent'    => 'wp-logo-external',
		'id'        => 'feedback',
		'title'     => __('Feedback'),
		'href'      => __('https://wordpress.org/support/forum/requests-and-feedback'),
	) );
}

/**
 * Add the sidebar toggle button.
 *
 * @since 3.8.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_sidebar_toggle( $wp_admin_bar ) {
	if ( is_admin() ) {
		$wp_admin_bar->add_menu( array(
			'id'    => 'menu-toggle',
			'title' => '<span class="ab-icon"></span><span class="screen-reader-text">' . __( 'Menu' ) . '</span>',
			'href'  => '#',
		) );
	}
}

/**
 * Add the "My Account" item.
 *
 * @since 3.3.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_my_account_item( $wp_admin_bar ) {
	$user_id      = get_current_user_id();
	$current_user = wp_get_current_user();
	$profile_url  = get_edit_profile_url( $user_id );

	if ( ! $user_id )
		return;

	$avatar = get_avatar( $user_id, 26 );
	$howdy  = sprintf( __('Howdy, %1$s'), $current_user->display_name );
	$class  = empty( $avatar ) ? '' : 'with-avatar';

	$wp_admin_bar->add_menu( array(
		'id'        => 'my-account',
		'parent'    => 'top-secondary',
		'title'     => $howdy . $avatar,
		'href'      => $profile_url,
		'meta'      => array(
			'class'     => $class,
			'title'     => __('My Account'),
		),
	) );
}

/**
 * Add the "My Account" submenu items.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_my_account_menu( $wp_admin_bar ) {
	$user_id      = get_current_user_id();
	$current_user = wp_get_current_user();
	$profile_url  = get_edit_profile_url( $user_id );

	if ( ! $user_id )
		return;

	$wp_admin_bar->add_group( array(
		'parent' => 'my-account',
		'id'     => 'user-actions',
	) );

	$user_info  = get_avatar( $user_id, 64 );
	$user_info .= "<span class='display-name'>{$current_user->display_name}</span>";

	if ( $current_user->display_name !== $current_user->user_login )
		$user_info .= "<span class='username'>{$current_user->user_login}</span>";

	$wp_admin_bar->add_menu( array(
		'parent' => 'user-actions',
		'id'     => 'user-info',
		'title'  => $user_info,
		'href'   => $profile_url,
		'meta'   => array(
			'tabindex' => -1,
		),
	) );
	$wp_admin_bar->add_menu( array(
		'parent' => 'user-actions',
		'id'     => 'edit-profile',
		'title'  => __( 'Edit My Profile' ),
		'href' => $profile_url,
	) );
	$wp_admin_bar->add_menu( array(
		'parent' => 'user-actions',
		'id'     => 'logout',
		'title'  => __( 'Log Out' ),
		'href'   => wp_logout_url(),
	) );
}

/**
 * Add the "Site Name" menu.
 *
 * @since 3.3.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_site_menu( $wp_admin_bar ) {
	// Don't show for logged out users.
	if ( ! is_user_logged_in() )
		return;

	// Show only when the user is a member of this site, or they're a super admin.
	if ( ! is_user_member_of_blog() && ! is_super_admin() )
		return;

	$blogname = get_bloginfo('name');

	if ( empty( $blogname ) )
		$blogname = preg_replace( '#^(https?://)?(www.)?#', '', get_home_url() );

	if ( is_network_admin() ) {
		$blogname = sprintf( __('Network Admin: %s'), esc_html( get_current_site()->site_name ) );
	} elseif ( is_user_admin() ) {
		$blogname = sprintf( __('Global Dashboard: %s'), esc_html( get_current_site()->site_name ) );
	}

	$title = wp_html_excerpt( $blogname, 40, '&hellip;' );

	$wp_admin_bar->add_menu( array(
		'id'    => 'site-name',
		'title' => $title,
		'href'  => is_admin() ? home_url( '/' ) : admin_url(),
	) );

	// Create submenu items.

	if ( is_admin() ) {
		// Add an option to visit the site.
		$wp_admin_bar->add_menu( array(
			'parent' => 'site-name',
			'id'     => 'view-site',
			'title'  => __( 'Visit Site' ),
			'href'   => home_url( '/' ),
		) );

		if ( is_blog_admin() && is_multisite() && current_user_can( 'manage_sites' ) ) {
			$wp_admin_bar->add_menu( array(
				'parent' => 'site-name',
				'id'     => 'edit-site',
				'title'  => __( 'Edit Site' ),
				'href'   => network_admin_url( 'site-info.php?id=' . get_current_blog_id() ),
			) );
		}

	} else {
		// We're on the front end, link to the Dashboard.
		$wp_admin_bar->add_menu( array(
			'parent' => 'site-name',
			'id'     => 'dashboard',
			'title'  => __( 'Dashboard' ),
			'href'   => admin_url(),
		) );

		// Add the appearance submenu items.
		wp_admin_bar_appearance_menu( $wp_admin_bar );
	}
}

/**
 * Add the "My Sites/[Site Name]" menu and all submenus.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_my_sites_menu( $wp_admin_bar ) {
	// Don't show for logged out users or single site mode.
	if ( ! is_user_logged_in() || ! is_multisite() )
		return;

	// Show only when the user has at least one site, or they're a super admin.
	if ( count( $wp_admin_bar->user->blogs ) < 1 && ! is_super_admin() )
		return;

	$wp_admin_bar->add_menu( array(
		'id'    => 'my-sites',
		'title' => __( 'My Sites' ),
		'href'  => admin_url( 'my-sites.php' ),
	) );

	if ( is_super_admin() ) {
		$wp_admin_bar->add_group( array(
			'parent' => 'my-sites',
			'id'     => 'my-sites-super-admin',
		) );

		$wp_admin_bar->add_menu( array(
			'parent' => 'my-sites-super-admin',
			'id'     => 'network-admin',
			'title'  => __('Network Admin'),
			'href'   => network_admin_url(),
		) );

		$wp_admin_bar->add_menu( array(
			'parent' => 'network-admin',
			'id'     => 'network-admin-d',
			'title'  => __( 'Dashboard' ),
			'href'   => network_admin_url(),
		) );
		$wp_admin_bar->add_menu( array(
			'parent' => 'network-admin',
			'id'     => 'network-admin-s',
			'title'  => __( 'Sites' ),
			'href'   => network_admin_url( 'sites.php' ),
		) );
		$wp_admin_bar->add_menu( array(
			'parent' => 'network-admin',
			'id'     => 'network-admin-u',
			'title'  => __( 'Users' ),
			'href'   => network_admin_url( 'users.php' ),
		) );
		$wp_admin_bar->add_menu( array(
			'parent' => 'network-admin',
			'id'     => 'network-admin-t',
			'title'  => __( 'Themes' ),
			'href'   => network_admin_url( 'themes.php' ),
		) );
		$wp_admin_bar->add_menu( array(
			'parent' => 'network-admin',
			'id'     => 'network-admin-p',
			'title'  => __( 'Plugins' ),
			'href'   => network_admin_url( 'plugins.php' ),
		) );
	}

	// Add site links
	$wp_admin_bar->add_group( array(
		'parent' => 'my-sites',
		'id'     => 'my-sites-list',
		'meta'   => array(
			'class' => is_super_admin() ? 'ab-sub-secondary' : '',
		),
	) );

	foreach ( (array) $wp_admin_bar->user->blogs as $blog ) {
		switch_to_blog( $blog->userblog_id );

		$blavatar = '<div class="blavatar"></div>';

		$blogname = empty( $blog->blogname ) ? $blog->domain : $blog->blogname;
		$menu_id  = 'blog-' . $blog->userblog_id;

		$wp_admin_bar->add_menu( array(
			'parent'    => 'my-sites-list',
			'id'        => $menu_id,
			'title'     => $blavatar . $blogname,
			'href'      => admin_url(),
		) );

		$wp_admin_bar->add_menu( array(
			'parent' => $menu_id,
			'id'     => $menu_id . '-d',
			'title'  => __( 'Dashboard' ),
			'href'   => admin_url(),
		) );

		if ( current_user_can( get_post_type_object( 'post' )->cap->create_posts ) ) {
			$wp_admin_bar->add_menu( array(
				'parent' => $menu_id,
				'id'     => $menu_id . '-n',
				'title'  => __( 'New Post' ),
				'href'   => admin_url( 'post-new.php' ),
			) );
		}

		if ( current_user_can( 'edit_posts' ) ) {
			$wp_admin_bar->add_menu( array(
				'parent' => $menu_id,
				'id'     => $menu_id . '-c',
				'title'  => __( 'Manage Comments' ),
				'href'   => admin_url( 'edit-comments.php' ),
			) );
		}

		$wp_admin_bar->add_menu( array(
			'parent' => $menu_id,
			'id'     => $menu_id . '-v',
			'title'  => __( 'Visit Site' ),
			'href'   => home_url( '/' ),
		) );

		restore_current_blog();
	}
}

/**
 * Provide a shortlink.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_shortlink_menu( $wp_admin_bar ) {
	$short = wp_get_shortlink( 0, 'query' );
	$id = 'get-shortlink';

	if ( empty( $short ) )
		return;

	$html = '<input class="shortlink-input" type="text" readonly="readonly" value="' . esc_attr( $short ) . '" />';

	$wp_admin_bar->add_menu( array(
		'id' => $id,
		'title' => __( 'Shortlink' ),
		'href' => $short,
		'meta' => array( 'html' => $html ),
	) );
}

/**
 * Provide an edit link for posts and terms.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_edit_menu( $wp_admin_bar ) {
	global $tag, $wp_the_query;

	if ( is_admin() ) {
		$current_screen = get_current_screen();
		$post = get_post();

		if ( 'post' == $current_screen->base
			&& 'add' != $current_screen->action
			&& ( $post_type_object = get_post_type_object( $post->post_type ) )
			&& current_user_can( 'read_post', $post->ID )
			&& ( $post_type_object->public )
			&& ( $post_type_object->show_in_admin_bar ) )
		{
			if( 'draft' == $post->post_status ) {
				$preview_link = set_url_scheme( get_permalink( $post->ID ) );
				/** This filter is documented in wp-admin/includes/meta-boxes.php */
				$preview_link = apply_filters( 'preview_post_link', add_query_arg( 'preview', 'true', $preview_link ), $post );
				$wp_admin_bar->add_menu( array(
					'id' => 'preview',
					'title' => $post_type_object->labels->view_item,
					'href' => esc_url( $preview_link ),
					'meta' => array( 'target' => 'wp-preview-' . $post->ID ),
				) );
			} else {
				$wp_admin_bar->add_menu( array(
					'id' => 'view',
					'title' => $post_type_object->labels->view_item,
					'href' => get_permalink( $post->ID )
				) );
			}
		} elseif ( 'edit-tags' == $current_screen->base
			&& isset( $tag ) && is_object( $tag )
			&& ( $tax = get_taxonomy( $tag->taxonomy ) )
			&& $tax->public )
		{
			$wp_admin_bar->add_menu( array(
				'id' => 'view',
				'title' => $tax->labels->view_item,
				'href' => get_term_link( $tag )
			) );
		}
	} else {
		$current_object = $wp_the_query->get_queried_object();

		if ( empty( $current_object ) )
			return;

		if ( ! empty( $current_object->post_type )
			&& ( $post_type_object = get_post_type_object( $current_object->post_type ) )
			&& current_user_can( 'edit_post', $current_object->ID )
			&& $post_type_object->show_ui && $post_type_object->show_in_admin_bar )
		{
			$wp_admin_bar->add_menu( array(
				'id' => 'edit',
				'title' => $post_type_object->labels->edit_item,
				'href' => get_edit_post_link( $current_object->ID )
			) );
		} elseif ( ! empty( $current_object->taxonomy )
			&& ( $tax = get_taxonomy( $current_object->taxonomy ) )
			&& current_user_can( $tax->cap->edit_terms )
			&& $tax->show_ui )
		{
			$wp_admin_bar->add_menu( array(
				'id' => 'edit',
				'title' => $tax->labels->edit_item,
				'href' => get_edit_term_link( $current_object->term_id, $current_object->taxonomy )
			) );
		}
	}
}

/**
 * Add "Add New" menu.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_new_content_menu( $wp_admin_bar ) {
	$actions = array();

	$cpts = (array) get_post_types( array( 'show_in_admin_bar' => true ), 'objects' );

	if ( isset( $cpts['post'] ) && current_user_can( $cpts['post']->cap->create_posts ) )
		$actions[ 'post-new.php' ] = array( $cpts['post']->labels->name_admin_bar, 'new-post' );

	if ( isset( $cpts['attachment'] ) && current_user_can( 'upload_files' ) )
		$actions[ 'media-new.php' ] = array( $cpts['attachment']->labels->name_admin_bar, 'new-media' );

	if ( current_user_can( 'manage_links' ) )
		$actions[ 'link-add.php' ] = array( _x( 'Link', 'add new from admin bar' ), 'new-link' );

	if ( isset( $cpts['page'] ) && current_user_can( $cpts['page']->cap->create_posts ) )
		$actions[ 'post-new.php?post_type=page' ] = array( $cpts['page']->labels->name_admin_bar, 'new-page' );

	unset( $cpts['post'], $cpts['page'], $cpts['attachment'] );

	// Add any additional custom post types.
	foreach ( $cpts as $cpt ) {
		if ( ! current_user_can( $cpt->cap->create_posts ) )
			continue;

		$key = 'post-new.php?post_type=' . $cpt->name;
		$actions[ $key ] = array( $cpt->labels->name_admin_bar, 'new-' . $cpt->name );
	}
	// Avoid clash with parent node and a 'content' post type.
	if ( isset( $actions['post-new.php?post_type=content'] ) )
		$actions['post-new.php?post_type=content'][1] = 'add-new-content';

	if ( current_user_can( 'create_users' ) || current_user_can( 'promote_users' ) )
		$actions[ 'user-new.php' ] = array( _x( 'User', 'add new from admin bar' ), 'new-user' );

	if ( ! $actions )
		return;

	$title = '<span class="ab-icon"></span><span class="ab-label">' . _x( 'New', 'admin bar menu group label' ) . '</span>';

	$wp_admin_bar->add_menu( array(
		'id'    => 'new-content',
		'title' => $title,
		'href'  => admin_url( current( array_keys( $actions ) ) ),
		'meta'  => array(
			'title' => _x( 'Add New', 'admin bar menu group label' ),
		),
	) );

	foreach ( $actions as $link => $action ) {
		list( $title, $id ) = $action;

		$wp_admin_bar->add_menu( array(
			'parent'    => 'new-content',
			'id'        => $id,
			'title'     => $title,
			'href'      => admin_url( $link )
		) );
	}
}

/**
 * Add edit comments link with awaiting moderation count bubble.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_comments_menu( $wp_admin_bar ) {
	if ( !current_user_can('edit_posts') )
		return;

	$awaiting_mod = wp_count_comments();
	$awaiting_mod = $awaiting_mod->moderated;
	$awaiting_title = esc_attr( sprintf( _n( '%s comment awaiting moderation', '%s comments awaiting moderation', $awaiting_mod ), number_format_i18n( $awaiting_mod ) ) );

	$icon  = '<span class="ab-icon"></span>';
	$title = '<span id="ab-awaiting-mod" class="ab-label awaiting-mod pending-count count-' . $awaiting_mod . '">' . number_format_i18n( $awaiting_mod ) . '</span>';

	$wp_admin_bar->add_menu( array(
		'id'    => 'comments',
		'title' => $icon . $title,
		'href'  => admin_url('edit-comments.php'),
		'meta'  => array( 'title' => $awaiting_title ),
	) );
}

/**
 * Add appearance submenu items to the "Site Name" menu.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_appearance_menu( $wp_admin_bar ) {
	$wp_admin_bar->add_group( array( 'parent' => 'site-name', 'id' => 'appearance' ) );

	if ( current_user_can( 'switch_themes' ) || current_user_can( 'edit_theme_options' ) )
		$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'themes', 'title' => __('Themes'), 'href' => admin_url('themes.php') ) );

	if ( ! current_user_can( 'edit_theme_options' ) )
		return;

	if ( current_user_can( 'customize' ) ) {
		$current_url = ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
		$wp_admin_bar->add_menu( array(
			'parent' => 'appearance',
			'id'     => 'customize',
			'title'  => __('Customize'),
			'href'   => add_query_arg( 'url', urlencode( $current_url ), wp_customize_url() ),
			'meta'   => array(
				'class' => 'hide-if-no-customize',
			),
		) );
		add_action( 'wp_before_admin_bar_render', 'wp_customize_support_script' );
	}

	if ( current_theme_supports( 'widgets' )  )
		$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'widgets', 'title' => __('Widgets'), 'href' => admin_url('widgets.php') ) );

	if ( current_theme_supports( 'menus' ) || current_theme_supports( 'widgets' ) )
		$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'menus', 'title' => __('Menus'), 'href' => admin_url('nav-menus.php') ) );

	if ( current_theme_supports( 'custom-background' ) )
		$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'background', 'title' => __('Background'), 'href' => admin_url('themes.php?page=custom-background') ) );

	if ( current_theme_supports( 'custom-header' ) )
		$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'header', 'title' => __('Header'), 'href' => admin_url('themes.php?page=custom-header') ) );
}

/**
 * Provide an update link if theme/plugin/core updates are available.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_updates_menu( $wp_admin_bar ) {

	$update_data = wp_get_update_data();

	if ( !$update_data['counts']['total'] )
		return;

	$title = '<span class="ab-icon"></span><span class="ab-label">' . number_format_i18n( $update_data['counts']['total'] ) . '</span>';
	$title .= '<span class="screen-reader-text">' . $update_data['title'] . '</span>';

	$wp_admin_bar->add_menu( array(
		'id'    => 'updates',
		'title' => $title,
		'href'  => network_admin_url( 'update-core.php' ),
		'meta'  => array(
			'title' => $update_data['title'],
		),
	) );
}

/**
 * Add search form.
 *
 * @since 3.3.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_search_menu( $wp_admin_bar ) {
	if ( is_admin() )
		return;

	$form  = '<form action="' . esc_url( home_url( '/' ) ) . '" method="get" id="adminbarsearch">';
	$form .= '<input class="adminbar-input" name="s" id="adminbar-search" type="text" value="" maxlength="150" />';
	$form .= '<input type="submit" class="adminbar-button" value="' . __('Search') . '"/>';
	$form .= '</form>';

	$wp_admin_bar->add_menu( array(
		'parent' => 'top-secondary',
		'id'     => 'search',
		'title'  => $form,
		'meta'   => array(
			'class'    => 'admin-bar-search',
			'tabindex' => -1,
		)
	) );
}

/**
 * Add secondary menus.
 *
 * @since 3.3.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_add_secondary_groups( $wp_admin_bar ) {
	$wp_admin_bar->add_group( array(
		'id'     => 'top-secondary',
		'meta'   => array(
			'class' => 'ab-top-secondary',
		),
	) );

	$wp_admin_bar->add_group( array(
		'parent' => 'wp-logo',
		'id'     => 'wp-logo-external',
		'meta'   => array(
			'class' => 'ab-sub-secondary',
		),
	) );
}

/**
 * Style and scripts for the admin bar.
 *
 * @since 3.1.0
 */
function wp_admin_bar_header() { ?>
<style type="text/css" media="print">#wpadminbar { display:none; }</style>
<?php
}

/**
 * Default admin bar callback.
 *
 * @since 3.1.0
 */
function _admin_bar_bump_cb() { ?>
<style type="text/css" media="screen">
	html { margin-top: 32px !important; }
	* html body { margin-top: 32px !important; }
	@media screen and ( max-width: 782px ) {
		html { margin-top: 46px !important; }
		* html body { margin-top: 46px !important; }
	}
</style>
<?php
}

/**
 * Set the display status of the admin bar.
 *
 * This can be called immediately upon plugin load. It does not need to be called from a function hooked to the init action.
 *
 * @since 3.1.0
 *
 * @param bool $show Whether to allow the admin bar to show.
 * @return void
 */
function show_admin_bar( $show ) {
	global $show_admin_bar;
	$show_admin_bar = (bool) $show;
}

/**
 * Determine whether the admin bar should be showing.
 *
 * @since 3.1.0
 *
 * @return bool Whether the admin bar should be showing.
 */
function is_admin_bar_showing() {
	global $show_admin_bar, $pagenow;

	// For all these types of requests, we never want an admin bar.
	if ( defined('XMLRPC_REQUEST') || defined('DOING_AJAX') || defined('IFRAME_REQUEST') )
		return false;

	// Integrated into the admin.
	if ( is_admin() )
		return true;

	if ( ! isset( $show_admin_bar ) ) {
		if ( ! is_user_logged_in() || 'wp-login.php' == $pagenow ) {
			$show_admin_bar = false;
		} else {
			$show_admin_bar = _get_admin_bar_pref();
		}
	}

	/**
	 * Filter whether to show the admin bar.
	 *
	 * Returning false to this hook is the recommended way to hide the admin bar.
	 * The user's display preference is used for logged in users.
	 *
	 * @since 3.1.0
	 *
	 * @param bool $show_admin_bar Whether the admin bar should be shown. Default false.
	 */
	$show_admin_bar = apply_filters( 'show_admin_bar', $show_admin_bar );

	return $show_admin_bar;
}

/**
 * Retrieve the admin bar display preference of a user.
 *
 * @since 3.1.0
 * @access private
 *
 * @param string $context Context of this preference check. Defaults to 'front'. The 'admin'
 * 	preference is no longer used.
 * @param int $user Optional. ID of the user to check, defaults to 0 for current user.
 * @return bool Whether the admin bar should be showing for this user.
 */
function _get_admin_bar_pref( $context = 'front', $user = 0 ) {
	$pref = get_user_option( "show_admin_bar_{$context}", $user );
	if ( false === $pref )
		return true;

	return 'true' === $pref;
}

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<?php

/**

* Admin Bar

* This code handles the building and rendering of the press bar.

/**

* Instantiate the admin bar object and set it up as a global for access elsewhere.

* UNHOOKING THIS FUNCTION WILL NOT PROPERLY REMOVE THE ADMIN BAR.

* For that, use show_admin_bar(false) or the 'show_admin_bar' filter.

* @since 3.1.0

* @access private

* @return bool Whether the admin bar was successfully initialized.

function _wp_admin_bar_init() {

global $wp_admin_bar;

if ( ! is_admin_bar_showing() )

return false;

/* Load the admin bar class code ready for instantiation */

require( ABSPATH . WPINC . '/class-wp-admin-bar.php' );

/* Instantiate the admin bar */

/**

* Filter the admin bar class to instantiate.

* @since 3.1.0

* @param string $wp_admin_bar_class Admin bar class to use. Default 'WP_Admin_Bar'.

$admin_bar_class = apply_filters( 'wp_admin_bar_class', 'WP_Admin_Bar' );

if ( class_exists( $admin_bar_class ) )

$wp_admin_bar = new $admin_bar_class;

else

return false;

$wp_admin_bar->initialize();

$wp_admin_bar->add_menus();

return true;

}

// Don't remove. Wrong way to disable.

add_action( 'template_redirect', '_wp_admin_bar_init', 0 );

add_action( 'admin_init', '_wp_admin_bar_init' );

/**

* Render the admin bar to the page based on the $wp_admin_bar->menu member var.

* This is called very late on the footer actions so that it will render after anything else being

* added to the footer.

* It includes the action "admin_bar_menu" which should be used to hook in and

* add new menus to the admin bar. That way you can be sure that you are adding at most optimal point,

* right before the admin bar is rendered. This also gives you access to the $post global, among others.

* @since 3.1.0

function wp_admin_bar_render() {

global $wp_admin_bar;

if ( ! is_admin_bar_showing() || ! is_object( $wp_admin_bar ) )

return false;

/**

* Load all necessary admin bar items.

* This is the hook used to add, remove, or manipulate admin bar items.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar WP_Admin_Bar instance, passed by reference

do_action_ref_array( 'admin_bar_menu', array( &$wp_admin_bar ) );

/**

* Fires before the admin bar is rendered.

* @since 3.1.0

do_action( 'wp_before_admin_bar_render' );

$wp_admin_bar->render();

/**

* Fires after the admin bar is rendered.

* @since 3.1.0

do_action( 'wp_after_admin_bar_render' );

}

add_action( 'wp_footer', 'wp_admin_bar_render', 1000 );

add_action( 'in_admin_header', 'wp_admin_bar_render', 0 );

/**

* Add the WordPress logo menu.

* @since 3.3.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_wp_menu( $wp_admin_bar ) {

$wp_admin_bar->add_menu( array(

'id' => 'wp-logo',

'title' => '<span class="ab-icon"></span>',

'href' => self_admin_url( 'about.php' ),

'meta' => array(

'title' => __('About WordPress'),

) );

if ( is_user_logged_in() ) {

// Add "About WordPress" link

$wp_admin_bar->add_menu( array(

'parent' => 'wp-logo',

'id' => 'about',

'title' => __('About WordPress'),

'href' => self_admin_url( 'about.php' ),

) );

}

// Add WordPress.org link

$wp_admin_bar->add_menu( array(

'parent' => 'wp-logo-external',

'id' => 'wporg',

'title' => __('WordPress.org'),

'href' => __('https://wordpress.org/'),

) );

// Add codex link

$wp_admin_bar->add_menu( array(

'parent' => 'wp-logo-external',

'id' => 'documentation',

'title' => __('Documentation'),

'href' => __('http://codex.wordpress.org/'),

) );

// Add forums link

$wp_admin_bar->add_menu( array(

'parent' => 'wp-logo-external',

'id' => 'support-forums',

'title' => __('Support Forums'),

'href' => __('https://wordpress.org/support/'),

) );

// Add feedback link

$wp_admin_bar->add_menu( array(

'parent' => 'wp-logo-external',

'id' => 'feedback',

'title' => __('Feedback'),

'href' => __('https://wordpress.org/support/forum/requests-and-feedback'),

) );

}

/**

* Add the sidebar toggle button.

* @since 3.8.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_sidebar_toggle( $wp_admin_bar ) {

if ( is_admin() ) {

$wp_admin_bar->add_menu( array(

'id' => 'menu-toggle',

'title' => '<span class="ab-icon"></span><span class="screen-reader-text">' . __( 'Menu' ) . '</span>',

'href' => '#',

) );

}

/**

* Add the "My Account" item.

* @since 3.3.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_my_account_item( $wp_admin_bar ) {

$user_id = get_current_user_id();

$current_user = wp_get_current_user();

$profile_url = get_edit_profile_url( $user_id );

if ( ! $user_id )

return;

$avatar = get_avatar( $user_id, 26 );

$howdy = sprintf( __('Howdy, %1$s'), $current_user->display_name );

$class = empty( $avatar ) ? '' : 'with-avatar';

$wp_admin_bar->add_menu( array(

'id' => 'my-account',

'parent' => 'top-secondary',

'title' => $howdy . $avatar,

'href' => $profile_url,

'meta' => array(

'class' => $class,

'title' => __('My Account'),

) );

}

/**

* Add the "My Account" submenu items.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_my_account_menu( $wp_admin_bar ) {

$user_id = get_current_user_id();

$current_user = wp_get_current_user();

$profile_url = get_edit_profile_url( $user_id );

if ( ! $user_id )

return;

$wp_admin_bar->add_group( array(

'parent' => 'my-account',

'id' => 'user-actions',

) );

$user_info = get_avatar( $user_id, 64 );

$user_info .= "<span class='display-name'>{$current_user->display_name}</span>";

if ( $current_user->display_name !== $current_user->user_login )

$user_info .= "<span class='username'>{$current_user->user_login}</span>";

$wp_admin_bar->add_menu( array(

'parent' => 'user-actions',

'id' => 'user-info',

'title' => $user_info,

'href' => $profile_url,

'meta' => array(

'tabindex' => -1,

) );

$wp_admin_bar->add_menu( array(

'parent' => 'user-actions',

'id' => 'edit-profile',

'title' => __( 'Edit My Profile' ),

'href' => $profile_url,

) );

$wp_admin_bar->add_menu( array(

'parent' => 'user-actions',

'id' => 'logout',

'title' => __( 'Log Out' ),

'href' => wp_logout_url(),

) );

}

/**

* Add the "Site Name" menu.

* @since 3.3.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_site_menu( $wp_admin_bar ) {

// Don't show for logged out users.

if ( ! is_user_logged_in() )

return;

// Show only when the user is a member of this site, or they're a super admin.

if ( ! is_user_member_of_blog() && ! is_super_admin() )

return;

$blogname = get_bloginfo('name');

if ( empty( $blogname ) )

$blogname = preg_replace( '#^(https?://)?(www.)?#', '', get_home_url() );

if ( is_network_admin() ) {

$blogname = sprintf( __('Network Admin: %s'), esc_html( get_current_site()->site_name ) );

} elseif ( is_user_admin() ) {

$blogname = sprintf( __('Global Dashboard: %s'), esc_html( get_current_site()->site_name ) );

}

$title = wp_html_excerpt( $blogname, 40, '…' );

$wp_admin_bar->add_menu( array(

'id' => 'site-name',

'title' => $title,

'href' => is_admin() ? home_url( '/' ) : admin_url(),

) );

// Create submenu items.

if ( is_admin() ) {

// Add an option to visit the site.

$wp_admin_bar->add_menu( array(

'parent' => 'site-name',

'id' => 'view-site',

'title' => __( 'Visit Site' ),

'href' => home_url( '/' ),

) );

if ( is_blog_admin() && is_multisite() && current_user_can( 'manage_sites' ) ) {

$wp_admin_bar->add_menu( array(

'parent' => 'site-name',

'id' => 'edit-site',

'title' => __( 'Edit Site' ),

'href' => network_admin_url( 'site-info.php?id=' . get_current_blog_id() ),

) );

}

} else {

// We're on the front end, link to the Dashboard.

$wp_admin_bar->add_menu( array(

'parent' => 'site-name',

'id' => 'dashboard',

'title' => __( 'Dashboard' ),

'href' => admin_url(),

) );

// Add the appearance submenu items.

wp_admin_bar_appearance_menu( $wp_admin_bar );

}

/**

* Add the "My Sites/[Site Name]" menu and all submenus.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_my_sites_menu( $wp_admin_bar ) {

// Don't show for logged out users or single site mode.

if ( ! is_user_logged_in() || ! is_multisite() )

return;

// Show only when the user has at least one site, or they're a super admin.

if ( count( $wp_admin_bar->user->blogs ) < 1 && ! is_super_admin() )

return;

$wp_admin_bar->add_menu( array(

'id' => 'my-sites',

'title' => __( 'My Sites' ),

'href' => admin_url( 'my-sites.php' ),

) );

if ( is_super_admin() ) {

$wp_admin_bar->add_group( array(

'parent' => 'my-sites',

'id' => 'my-sites-super-admin',

) );

$wp_admin_bar->add_menu( array(

'parent' => 'my-sites-super-admin',

'id' => 'network-admin',

'title' => __('Network Admin'),

'href' => network_admin_url(),

) );

$wp_admin_bar->add_menu( array(

'parent' => 'network-admin',

'id' => 'network-admin-d',

'title' => __( 'Dashboard' ),

'href' => network_admin_url(),

) );

$wp_admin_bar->add_menu( array(

'parent' => 'network-admin',

'id' => 'network-admin-s',

'title' => __( 'Sites' ),

'href' => network_admin_url( 'sites.php' ),

) );

$wp_admin_bar->add_menu( array(

'parent' => 'network-admin',

'id' => 'network-admin-u',

'title' => __( 'Users' ),

'href' => network_admin_url( 'users.php' ),

) );

$wp_admin_bar->add_menu( array(

'parent' => 'network-admin',

'id' => 'network-admin-t',

'title' => __( 'Themes' ),

'href' => network_admin_url( 'themes.php' ),

) );

$wp_admin_bar->add_menu( array(

'parent' => 'network-admin',

'id' => 'network-admin-p',

'title' => __( 'Plugins' ),

'href' => network_admin_url( 'plugins.php' ),

) );

}

// Add site links

$wp_admin_bar->add_group( array(

'parent' => 'my-sites',

'id' => 'my-sites-list',

'meta' => array(

'class' => is_super_admin() ? 'ab-sub-secondary' : '',

) );

foreach ( (array) $wp_admin_bar->user->blogs as $blog ) {

switch_to_blog( $blog->userblog_id );

$blavatar = '<div class="blavatar"></div>';

$blogname = empty( $blog->blogname ) ? $blog->domain : $blog->blogname;

$menu_id = 'blog-' . $blog->userblog_id;

$wp_admin_bar->add_menu( array(

'parent' => 'my-sites-list',

'id' => $menu_id,

'title' => $blavatar . $blogname,

'href' => admin_url(),

) );

$wp_admin_bar->add_menu( array(

'parent' => $menu_id,

'id' => $menu_id . '-d',

'title' => __( 'Dashboard' ),

'href' => admin_url(),

) );

if ( current_user_can( get_post_type_object( 'post' )->cap->create_posts ) ) {

$wp_admin_bar->add_menu( array(

'parent' => $menu_id,

'id' => $menu_id . '-n',

'title' => __( 'New Post' ),

'href' => admin_url( 'post-new.php' ),

) );

}

if ( current_user_can( 'edit_posts' ) ) {

$wp_admin_bar->add_menu( array(

'parent' => $menu_id,

'id' => $menu_id . '-c',

'title' => __( 'Manage Comments' ),

'href' => admin_url( 'edit-comments.php' ),

) );

}

$wp_admin_bar->add_menu( array(

'parent' => $menu_id,

'id' => $menu_id . '-v',

'title' => __( 'Visit Site' ),

'href' => home_url( '/' ),

) );

restore_current_blog();

}

/**

* Provide a shortlink.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_shortlink_menu( $wp_admin_bar ) {

$short = wp_get_shortlink( 0, 'query' );

$id = 'get-shortlink';

if ( empty( $short ) )

return;

$html = '<input class="shortlink-input" type="text" readonly="readonly" value="' . esc_attr( $short ) . '" />';

$wp_admin_bar->add_menu( array(

'id' => $id,

'title' => __( 'Shortlink' ),

'href' => $short,

'meta' => array( 'html' => $html ),

) );

}

/**

* Provide an edit link for posts and terms.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_edit_menu( $wp_admin_bar ) {

global $tag, $wp_the_query;

if ( is_admin() ) {

$current_screen = get_current_screen();

$post = get_post();

if ( 'post' == $current_screen->base

&& 'add' != $current_screen->action

&& ( $post_type_object = get_post_type_object( $post->post_type ) )

&& current_user_can( 'read_post', $post->ID )

&& ( $post_type_object->public )

&& ( $post_type_object->show_in_admin_bar ) )

{

if( 'draft' == $post->post_status ) {

$preview_link = set_url_scheme( get_permalink( $post->ID ) );

/** This filter is documented in wp-admin/includes/meta-boxes.php */

$preview_link = apply_filters( 'preview_post_link', add_query_arg( 'preview', 'true', $preview_link ), $post );

$wp_admin_bar->add_menu( array(

'id' => 'preview',

'title' => $post_type_object->labels->view_item,

'href' => esc_url( $preview_link ),

'meta' => array( 'target' => 'wp-preview-' . $post->ID ),

) );

} else {

$wp_admin_bar->add_menu( array(

'id' => 'view',

'title' => $post_type_object->labels->view_item,

'href' => get_permalink( $post->ID )

) );

}

} elseif ( 'edit-tags' == $current_screen->base

&& isset( $tag ) && is_object( $tag )

&& ( $tax = get_taxonomy( $tag->taxonomy ) )

&& $tax->public )

{

$wp_admin_bar->add_menu( array(

'id' => 'view',

'title' => $tax->labels->view_item,

'href' => get_term_link( $tag )

) );

}

} else {

$current_object = $wp_the_query->get_queried_object();

if ( empty( $current_object ) )

return;

if ( ! empty( $current_object->post_type )

&& ( $post_type_object = get_post_type_object( $current_object->post_type ) )

&& current_user_can( 'edit_post', $current_object->ID )

&& $post_type_object->show_ui && $post_type_object->show_in_admin_bar )

{

$wp_admin_bar->add_menu( array(

'id' => 'edit',

'title' => $post_type_object->labels->edit_item,

'href' => get_edit_post_link( $current_object->ID )

) );

} elseif ( ! empty( $current_object->taxonomy )

&& ( $tax = get_taxonomy( $current_object->taxonomy ) )

&& current_user_can( $tax->cap->edit_terms )

&& $tax->show_ui )

{

$wp_admin_bar->add_menu( array(

'id' => 'edit',

'title' => $tax->labels->edit_item,

'href' => get_edit_term_link( $current_object->term_id, $current_object->taxonomy )

) );

}

/**

* Add "Add New" menu.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_new_content_menu( $wp_admin_bar ) {

$actions = array();

$cpts = (array) get_post_types( array( 'show_in_admin_bar' => true ), 'objects' );

if ( isset( $cpts['post'] ) && current_user_can( $cpts['post']->cap->create_posts ) )

$actions[ 'post-new.php' ] = array( $cpts['post']->labels->name_admin_bar, 'new-post' );

if ( isset( $cpts['attachment'] ) && current_user_can( 'upload_files' ) )

$actions[ 'media-new.php' ] = array( $cpts['attachment']->labels->name_admin_bar, 'new-media' );

if ( current_user_can( 'manage_links' ) )

$actions[ 'link-add.php' ] = array( _x( 'Link', 'add new from admin bar' ), 'new-link' );

if ( isset( $cpts['page'] ) && current_user_can( $cpts['page']->cap->create_posts ) )

$actions[ 'post-new.php?post_type=page' ] = array( $cpts['page']->labels->name_admin_bar, 'new-page' );

unset( $cpts['post'], $cpts['page'], $cpts['attachment'] );

// Add any additional custom post types.

foreach ( $cpts as $cpt ) {

if ( ! current_user_can( $cpt->cap->create_posts ) )

continue;

$key = 'post-new.php?post_type=' . $cpt->name;

$actions[ $key ] = array( $cpt->labels->name_admin_bar, 'new-' . $cpt->name );

}

// Avoid clash with parent node and a 'content' post type.

if ( isset( $actions['post-new.php?post_type=content'] ) )

$actions['post-new.php?post_type=content'][1] = 'add-new-content';

if ( current_user_can( 'create_users' ) || current_user_can( 'promote_users' ) )

$actions[ 'user-new.php' ] = array( _x( 'User', 'add new from admin bar' ), 'new-user' );

if ( ! $actions )

return;

$title = '<span class="ab-icon"></span><span class="ab-label">' . _x( 'New', 'admin bar menu group label' ) . '</span>';

$wp_admin_bar->add_menu( array(

'id' => 'new-content',

'title' => $title,

'href' => admin_url( current( array_keys( $actions ) ) ),

'meta' => array(

'title' => _x( 'Add New', 'admin bar menu group label' ),

) );

foreach ( $actions as $link => $action ) {

list( $title, $id ) = $action;

$wp_admin_bar->add_menu( array(

'parent' => 'new-content',

'id' => $id,

'title' => $title,

'href' => admin_url( $link )

) );

}

/**

* Add edit comments link with awaiting moderation count bubble.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_comments_menu( $wp_admin_bar ) {

if ( !current_user_can('edit_posts') )

return;

$awaiting_mod = wp_count_comments();

$awaiting_mod = $awaiting_mod->moderated;

$awaiting_title = esc_attr( sprintf( _n( '%s comment awaiting moderation', '%s comments awaiting moderation', $awaiting_mod ), number_format_i18n( $awaiting_mod ) ) );

$icon = '<span class="ab-icon"></span>';

$title = '<span id="ab-awaiting-mod" class="ab-label awaiting-mod pending-count count-' . $awaiting_mod . '">' . number_format_i18n( $awaiting_mod ) . '</span>';

$wp_admin_bar->add_menu( array(

'id' => 'comments',

'title' => $icon . $title,

'href' => admin_url('edit-comments.php'),

'meta' => array( 'title' => $awaiting_title ),

) );

}

/**

* Add appearance submenu items to the "Site Name" menu.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_appearance_menu( $wp_admin_bar ) {

$wp_admin_bar->add_group( array( 'parent' => 'site-name', 'id' => 'appearance' ) );

if ( current_user_can( 'switch_themes' ) || current_user_can( 'edit_theme_options' ) )

$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'themes', 'title' => __('Themes'), 'href' => admin_url('themes.php') ) );

if ( ! current_user_can( 'edit_theme_options' ) )

return;

if ( current_user_can( 'customize' ) ) {

$current_url = ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];

$wp_admin_bar->add_menu( array(

'parent' => 'appearance',

'id' => 'customize',

'title' => __('Customize'),

'href' => add_query_arg( 'url', urlencode( $current_url ), wp_customize_url() ),

'meta' => array(

'class' => 'hide-if-no-customize',

) );

add_action( 'wp_before_admin_bar_render', 'wp_customize_support_script' );

}

if ( current_theme_supports( 'widgets' ) )

$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'widgets', 'title' => __('Widgets'), 'href' => admin_url('widgets.php') ) );

if ( current_theme_supports( 'menus' ) || current_theme_supports( 'widgets' ) )

$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'menus', 'title' => __('Menus'), 'href' => admin_url('nav-menus.php') ) );

if ( current_theme_supports( 'custom-background' ) )

$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'background', 'title' => __('Background'), 'href' => admin_url('themes.php?page=custom-background') ) );

if ( current_theme_supports( 'custom-header' ) )

$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'header', 'title' => __('Header'), 'href' => admin_url('themes.php?page=custom-header') ) );

}

/**

* Provide an update link if theme/plugin/core updates are available.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_updates_menu( $wp_admin_bar ) {

$update_data = wp_get_update_data();

if ( !$update_data['counts']['total'] )

return;

$title = '<span class="ab-icon"></span><span class="ab-label">' . number_format_i18n( $update_data['counts']['total'] ) . '</span>';

$title .= '<span class="screen-reader-text">' . $update_data['title'] . '</span>';

$wp_admin_bar->add_menu( array(

'id' => 'updates',

'title' => $title,

'href' => network_admin_url( 'update-core.php' ),

'meta' => array(

'title' => $update_data['title'],

) );

}

/**

* Add search form.

* @since 3.3.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_search_menu( $wp_admin_bar ) {

if ( is_admin() )

return;

$form = '<form action="' . esc_url( home_url( '/' ) ) . '" method="get" id="adminbarsearch">';

$form .= '<input class="adminbar-input" name="s" id="adminbar-search" type="text" value="" maxlength="150" />';

$form .= '<input type="submit" class="adminbar-button" value="' . __('Search') . '"/>';

$form .= '</form>';

$wp_admin_bar->add_menu( array(

'parent' => 'top-secondary',

'id' => 'search',

'title' => $form,

'meta' => array(

'class' => 'admin-bar-search',

'tabindex' => -1,

)

) );

}

/**

* Add secondary menus.

* @since 3.3.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_add_secondary_groups( $wp_admin_bar ) {

$wp_admin_bar->add_group( array(

'id' => 'top-secondary',

'meta' => array(

'class' => 'ab-top-secondary',

) );

$wp_admin_bar->add_group( array(

'parent' => 'wp-logo',

'id' => 'wp-logo-external',

'meta' => array(

'class' => 'ab-sub-secondary',

) );

}

/**

* Style and scripts for the admin bar.

* @since 3.1.0

function wp_admin_bar_header() { ?>

<?php

}

/**

* Default admin bar callback.

* @since 3.1.0

function _admin_bar_bump_cb() { ?>

html { margin-top: 32px !important; }

* html body { margin-top: 32px !important; }

@media screen and ( max-width: 782px ) {

html { margin-top: 46px !important; }

* html body { margin-top: 46px !important; }

}

</style>

<?php

}

/**

* Set the display status of the admin bar.

* This can be called immediately upon plugin load. It does not need to be called from a function hooked to the init action.

* @since 3.1.0

* @param bool $show Whether to allow the admin bar to show.

* @return void

function show_admin_bar( $show ) {

global $show_admin_bar;

$show_admin_bar = (bool) $show;

}

/**

* Determine whether the admin bar should be showing.

* @since 3.1.0

* @return bool Whether the admin bar should be showing.

function is_admin_bar_showing() {

global $show_admin_bar, $pagenow;

// For all these types of requests, we never want an admin bar.

if ( defined('XMLRPC_REQUEST') || defined('DOING_AJAX') || defined('IFRAME_REQUEST') )

return false;

// Integrated into the admin.

if ( is_admin() )

return true;

if ( ! isset( $show_admin_bar ) ) {

if ( ! is_user_logged_in() || 'wp-login.php' == $pagenow ) {

$show_admin_bar = false;

} else {

$show_admin_bar = _get_admin_bar_pref();

}

/**

* Filter whether to show the admin bar.

* Returning false to this hook is the recommended way to hide the admin bar.

* The user's display preference is used for logged in users.

* @since 3.1.0

* @param bool $show_admin_bar Whether the admin bar should be shown. Default false.

$show_admin_bar = apply_filters( 'show_admin_bar', $show_admin_bar );

return $show_admin_bar;

}

/**

* Retrieve the admin bar display preference of a user.

* @since 3.1.0

* @access private

* @param string $context Context of this preference check. Defaults to 'front'. The 'admin'

* preference is no longer used.

* @param int $user Optional. ID of the user to check, defaults to 0 for current user.

* @return bool Whether the admin bar should be showing for this user.

function _get_admin_bar_pref( $context = 'front', $user = 0 ) {

$pref = get_user_option( "show_admin_bar_{$context}", $user );

if ( false === $pref )

return true;

return 'true' === $pref;

}

: WordPressを読む　51-1 /blog/wp-includes/kses.php 1
/blog/wp-includes/kses.php [crayon-66232 …

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/blog/wp-includes/widgets.php1

WP_Widget::

WP_Widget_Factory::

WordPressを読む　68-1 /blog/wp-includes/widgets.php 1