/**
* Functions and filters related to the menus.
*
* Makes the default WordPress navigation use an HTML structure similar
* to the Navigation block.
*
* @link https://make.wordpress.org/themes/2020/07/06/printing-navigation-block-html-from-a-legacy-menu-in-themes/
*
* @package WordPress
* @subpackage Twenty_Twenty_One
* @since Twenty Twenty-One 1.0
*/
/**
* Add a button to top-level menu items that has sub-menus.
* An icon is added using CSS depending on the value of aria-expanded.
*
* @since Twenty Twenty-One 1.0
*
* @param string $output Nav menu item start element.
* @param object $item Nav menu item.
* @param int $depth Depth.
* @param object $args Nav menu args.
* @return string Nav menu item start element.
*/
function twenty_twenty_one_add_sub_menu_toggle( $output, $item, $depth, $args ) {
if ( 0 === $depth && in_array( 'menu-item-has-children', $item->classes, true ) ) {
// Add toggle button.
$output .= '';
}
return $output;
}
add_filter( 'walker_nav_menu_start_el', 'twenty_twenty_one_add_sub_menu_toggle', 10, 4 );
/**
* Detects the social network from a URL and returns the SVG code for its icon.
*
* @since Twenty Twenty-One 1.0
*
* @param string $uri Social link.
* @param int $size The icon size in pixels.
* @return string
*/
function twenty_twenty_one_get_social_link_svg( $uri, $size = 24 ) {
return Twenty_Twenty_One_SVG_Icons::get_social_link_svg( $uri, $size );
}
/**
* Displays SVG icons in the footer navigation.
*
* @since Twenty Twenty-One 1.0
*
* @param string $item_output The menu item's starting HTML output.
* @param WP_Post $item Menu item data object.
* @param int $depth Depth of the menu. Used for padding.
* @param stdClass $args An object of wp_nav_menu() arguments.
* @return string The menu item output with social icon.
*/
function twenty_twenty_one_nav_menu_social_icons( $item_output, $item, $depth, $args ) {
// Change SVG icon inside social links menu if there is supported URL.
if ( 'footer' === $args->theme_location ) {
$svg = twenty_twenty_one_get_social_link_svg( $item->url, 24 );
if ( ! empty( $svg ) ) {
$item_output = str_replace( $args->link_before, $svg, $item_output );
}
}
return $item_output;
}
add_filter( 'walker_nav_menu_start_el', 'twenty_twenty_one_nav_menu_social_icons', 10, 4 );
/**
* Filters the arguments for a single nav menu item.
*
* @since Twenty Twenty-One 1.0
*
* @param stdClass $args An object of wp_nav_menu() arguments.
* @param WP_Post $item Menu item data object.
* @param int $depth Depth of menu item. Used for padding.
* @return stdClass
*/
function twenty_twenty_one_add_menu_description_args( $args, $item, $depth ) {
if ( '' !== $args->link_after ) {
$args->link_after = '';
}
if ( 0 === $depth && isset( $item->description ) && $item->description ) {
// The extra element is here for styling purposes: Allows the description to not be underlined on hover.
$args->link_after = '';
}
return $args;
}
add_filter( 'nav_menu_item_args', 'twenty_twenty_one_add_menu_description_args', 10, 3 );namespace Elementor;
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly.
}
/**
* Elementor skin base.
*
* An abstract class to register new skins for Elementor widgets. Skins allows
* you to add new templates, set custom controls and more.
*
* To register new skins for your widget use the `add_skin()` method inside the
* widget's `register_skins()` method.
*
* @since 1.0.0
* @abstract
*/
abstract class Skin_Base extends Sub_Controls_Stack {
/**
* Parent widget.
*
* Holds the parent widget of the skin. Default value is null, no parent widget.
*
* @access protected
*
* @var Widget_Base|null
*/
protected $parent = null;
/**
* Skin base constructor.
*
* Initializing the skin base class by setting parent widget and registering
* controls actions.
*
* @since 1.0.0
* @access public
* @param Widget_Base $parent
*/
public function __construct( Widget_Base $parent ) {
parent::__construct( $parent );
$this->_register_controls_actions();
}
/**
* Render skin.
*
* Generates the final HTML on the frontend.
*
* @since 1.0.0
* @access public
* @abstract
*/
abstract public function render();
/**
* Render element in static mode.
*
* If not inherent will call the base render.
*/
public function render_static() {
$this->render();
}
/**
* Determine the render logic.
*/
public function render_by_mode() {
if ( Plugin::$instance->frontend->is_static_render_mode() ) {
$this->render_static();
return;
}
$this->render();
}
/**
* Register skin controls actions.
*
* Run on init and used to register new skins to be injected to the widget.
* This method is used to register new actions that specify the location of
* the skin in the widget.
*
* Example usage:
* `add_action( 'elementor/element/{widget_id}/{section_id}/before_section_end', [ $this, 'register_controls' ] );`
*
* @since 1.0.0
* @access protected
*/
protected function _register_controls_actions() {}
/**
* Get skin control ID.
*
* Retrieve the skin control ID. Note that skin controls have special prefix
* to distinguish them from regular controls, and from controls in other
* skins.
*
* @since 1.0.0
* @access protected
*
* @param string $control_base_id Control base ID.
*
* @return string Control ID.
*/
protected function get_control_id( $control_base_id ) {
$skin_id = str_replace( '-', '_', $this->get_id() );
return $skin_id . '_' . $control_base_id;
}
/**
* Get skin settings.
*
* Retrieve all the skin settings or, when requested, a specific setting.
*
* @since 1.0.0
* @TODO: rename to get_setting() and create backward compatibility.
*
* @access public
*
* @param string $control_base_id Control base ID.
*
* @return mixed
*/
public function get_instance_value( $control_base_id ) {
$control_id = $this->get_control_id( $control_base_id );
return $this->parent->get_settings( $control_id );
}
/**
* Start skin controls section.
*
* Used to add a new section of controls to the skin.
*
* @since 1.3.0
* @access public
*
* @param string $id Section ID.
* @param array $args Section arguments.
*/
public function start_controls_section( $id, $args = [] ) {
$args['condition']['_skin'] = $this->get_id();
parent::start_controls_section( $id, $args );
}
/**
* Add new skin control.
*
* Register a single control to the allow the user to set/update skin data.
*
* @param string $id Control ID.
* @param array $args Control arguments.
* @param array $options
*
* @return bool True if skin added, False otherwise.
* @since 3.0.0 New `$options` parameter added.
* @access public
*
*/
public function add_control( $id, $args = [], $options = [] ) {
$args['condition']['_skin'] = $this->get_id();
return parent::add_control( $id, $args, $options );
}
/**
* Update skin control.
*
* Change the value of an existing skin control.
*
* @since 1.3.0
* @since 1.8.1 New `$options` parameter added.
*
* @access public
*
* @param string $id Control ID.
* @param array $args Control arguments. Only the new fields you want to update.
* @param array $options Optional. Some additional options.
*/
public function update_control( $id, $args, array $options = [] ) {
$args['condition']['_skin'] = $this->get_id();
parent::update_control( $id, $args, $options );
}
/**
* Add new responsive skin control.
*
* Register a set of controls to allow editing based on user screen size.
*
* @param string $id Responsive control ID.
* @param array $args Responsive control arguments.
* @param array $options
*
* @since 1.0.5
* @access public
*
*/
public function add_responsive_control( $id, $args, $options = [] ) {
$args['condition']['_skin'] = $this->get_id();
parent::add_responsive_control( $id, $args );
}
/**
* Start skin controls tab.
*
* Used to add a new tab inside a group of tabs.
*
* @since 1.5.0
* @access public
*
* @param string $id Control ID.
* @param array $args Control arguments.
*/
public function start_controls_tab( $id, $args ) {
$args['condition']['_skin'] = $this->get_id();
parent::start_controls_tab( $id, $args );
}
/**
* Start skin controls tabs.
*
* Used to add a new set of tabs inside a section.
*
* @since 1.5.0
* @access public
*
* @param string $id Control ID.
*/
public function start_controls_tabs( $id ) {
$args['condition']['_skin'] = $this->get_id();
parent::start_controls_tabs( $id );
}
/**
* Add new group control.
*
* Register a set of related controls grouped together as a single unified
* control.
*
* @param string $group_name Group control name.
* @param array $args Group control arguments. Default is an empty array.
* @param array $options
*
* @since 1.0.0
* @access public
*
*/
final public function add_group_control( $group_name, $args = [], $options = [] ) {
$args['condition']['_skin'] = $this->get_id();
parent::add_group_control( $group_name, $args );
}
/**
* Set parent widget.
*
* Used to define the parent widget of the skin.
*
* @since 1.0.0
* @access public
*
* @param Widget_Base $parent Parent widget.
*/
public function set_parent( $parent ) {
$this->parent = $parent;
}
}
The symptoms of COVID‑19 can vary but often include fever,[7] fatigue, cough, breathing difficulties, loss of smell, and loss of taste.[8][9][10] Symptoms may begin one to fourteen days after exposure to the virus. At least a third of people who are infected do not develop noticeable symptoms.[11][12] Of those who develop symptoms noticeable enough to be classified as patients, most (81%) develop mild to moderate symptoms (up to mild pneumonia), while 14% develop severe symptoms (dyspnea, hypoxia, or more than 50% lung involvement on imaging), and 5% develop critical symptoms (respiratory failure, shock, or multiorgan dysfunction).[13] Older people have a higher risk of developing severe symptoms. Some complications result in death. Some people continue to experience a range of effects (long COVID) for months or years after infection, and damage to organs has been observed.[14] Multi-year studies on the long-term effects are ongoing.[15]
COVID‑19 transmission occurs when infectious particles are breathed in or come into contact with the eyes, nose, or mouth. The risk is highest when people are in close proximity, but small airborne particles containing the virus can remain suspended in the air and travel over longer distances, particularly indoors. Transmission can also occur when people touch their eyes, nose, or mouth after touching surfaces or objects that have been contaminated by the virus. People remain contagious for up to 20 days and can spread the virus even if they do not develop symptoms.[16]
Testing methods for COVID-19 to detect the virus’s nucleic acid include real-time reverse transcription polymerase chain reaction (RT‑PCR),[17][18] transcription-mediated amplification,[17][18][19] and reverse transcription loop-mediated isothermal amplification (RT‑LAMP)[17][18] from a nasopharyngeal swab.[20]
Several COVID-19 vaccines have been approved and distributed in various countries, many of which have initiated mass vaccination campaigns. Other preventive measures include physical or social distancing, quarantining, ventilation of indoor spaces, use of face masks or coverings in public, covering coughs and sneezes, hand washing, and keeping unwashed hands away from the face. While drugs have been developed to inhibit the virus, the primary treatment is still symptomatic, managing the disease through supportive care, isolation, and experimental measures.
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