WordPress/wp-content/themes/twentynineteen/inc/icon-functions.php

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<?php
/**
* SVG icons related functions
*
* @package WordPress
* @subpackage Twenty_Nineteen
* @since Twenty Nineteen 1.0
*/
/**
* Gets the SVG code for a given icon.
*/
function twentynineteen_get_icon_svg( $icon, $size = 24 ) {
return TwentyNineteen_SVG_Icons::get_svg( 'ui', $icon, $size );
}
/**
* Gets the SVG code for a given social icon.
*/
function twentynineteen_get_social_icon_svg( $icon, $size = 24 ) {
return TwentyNineteen_SVG_Icons::get_svg( 'social', $icon, $size );
}
/**
* Detects the social network from a URL and returns the SVG code for its icon.
*/
function twentynineteen_get_social_link_svg( $uri, $size = 24 ) {
return TwentyNineteen_SVG_Icons::get_social_link_svg( $uri, $size );
}
/**
* Display SVG icons in social links menu.
*
* @param string $item_output The menu item output.
* @param WP_Post $item Menu item object.
* @param int $depth Depth of the menu.
* @param array $args wp_nav_menu() arguments.
* @return string $item_output The menu item output with social icon.
*/
function twentynineteen_nav_menu_social_icons( $item_output, $item, $depth, $args ) {
// Change SVG icon inside social links menu if there is supported URL.
if ( 'social' === $args->theme_location ) {
$svg = twentynineteen_get_social_link_svg( $item->url, 26 );
if ( empty( $svg ) ) {
$svg = twentynineteen_get_icon_svg( 'link' );
}
$item_output = str_replace( $args->link_after, '</span>' . $svg, $item_output );
}
return $item_output;
}
add_filter( 'walker_nav_menu_start_el', 'twentynineteen_nav_menu_social_icons', 10, 4 );