129 lines
4 KiB
PHP
129 lines
4 KiB
PHP
<?php
|
|
/**
|
|
* SVG icons related functions and filters
|
|
*
|
|
* @package Radcliffe 2
|
|
*/
|
|
|
|
/**
|
|
* Add SVG definitions to the footer.
|
|
*/
|
|
function radcliffe_2_include_svg_icons() {
|
|
// Define SVG sprite file.
|
|
$svg_icons = get_parent_theme_file_path( '/assets/images/icons.svg' );
|
|
|
|
// If it exists, include it.
|
|
if ( file_exists( $svg_icons ) ) {
|
|
require_once( $svg_icons );
|
|
}
|
|
}
|
|
add_action( 'wp_footer', 'radcliffe_2_include_svg_icons', 9999 );
|
|
|
|
/**
|
|
* Return SVG markup.
|
|
*
|
|
* @param array $args {
|
|
* Parameters needed to display an SVG.
|
|
*
|
|
* @type string $icon Required SVG icon filename.
|
|
* @type string $title Optional SVG title.
|
|
* @type string $desc Optional SVG description.
|
|
* }
|
|
* @return string SVG markup.
|
|
*/
|
|
function radcliffe_2_get_svg( $args = array() ) {
|
|
$unique_id = null;
|
|
// Make sure $args are an array.
|
|
if ( empty( $args ) ) {
|
|
return esc_html__( 'Please define default parameters in the form of an array.', 'radcliffe-2' );
|
|
}
|
|
|
|
// Define an icon.
|
|
if ( false === array_key_exists( 'icon', $args ) ) {
|
|
return esc_html__( 'Please define an SVG icon filename.', 'radcliffe-2' );
|
|
}
|
|
|
|
// Set defaults.
|
|
$defaults = array(
|
|
'icon' => '',
|
|
'title' => '',
|
|
'desc' => '',
|
|
);
|
|
|
|
// Parse args.
|
|
$args = wp_parse_args( $args, $defaults );
|
|
|
|
// Set aria hidden.
|
|
$aria_hidden = ' aria-hidden="true"';
|
|
|
|
// Set ARIA.
|
|
$aria_labelledby = '';
|
|
|
|
/*
|
|
* Radcliffe 2 doesn't use the SVG title or description attributes; non-decorative icons are described with .screen-reader-text.
|
|
*
|
|
* However, child themes can use the title and description to add information to non-decorative SVG icons to improve accessibility.
|
|
*
|
|
* Example 1 with title: <?php echo radcliffe_2_get_svg( array( 'icon' => 'arrow-right', 'title' => esc_html__( 'This is the title', 'textdomain' ) ) ); ?>
|
|
*
|
|
* Example 2 with title and description: <?php echo radcliffe_2_get_svg( array( 'icon' => 'arrow-right', 'title' => esc_html__( 'This is the title', 'textdomain' ), 'desc' => esc_html__( 'This is the description', 'textdomain' ) ) ); ?>
|
|
*
|
|
* See https://www.paciellogroup.com/blog/2013/12/using-aria-enhance-svg-accessibility/.
|
|
*/
|
|
if ( $args['title'] ) {
|
|
$aria_hidden = '';
|
|
$unique_id = uniqid();
|
|
$aria_labelledby = ' aria-labelledby="title-' . $unique_id . '"';
|
|
|
|
if ( $args['desc'] ) {
|
|
$aria_labelledby = ' aria-labelledby="title-' . $unique_id . ' desc-' . $unique_id . '"';
|
|
}
|
|
}
|
|
|
|
// Begin SVG markup.
|
|
$svg = '<svg class="icon icon-' . esc_attr( $args['icon'] ) . '"' . $aria_hidden . $aria_labelledby . ' role="img">';
|
|
|
|
// Display the title.
|
|
if ( $args['title'] ) {
|
|
$svg .= '<title id="title-' . $unique_id . '">' . esc_html( $args['title'] ) . '</title>';
|
|
|
|
// Display the desc only if the title is already set.
|
|
if ( $args['desc'] ) {
|
|
$svg .= '<desc id="desc-' . $unique_id . '">' . esc_html( $args['desc'] ) . '</desc>';
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Display the icon.
|
|
*
|
|
* The whitespace around `<use>` is intentional - it is a work around to a keyboard navigation bug in Safari 10.
|
|
*
|
|
* See https://core.trac.wordpress.org/ticket/38387.
|
|
*/
|
|
$svg .= ' <use href="#icon-' . esc_html( $args['icon'] ) . '" xlink:href="#icon-' . esc_html( $args['icon'] ) . '"></use> ';
|
|
$svg .= '</svg>';
|
|
|
|
return $svg;
|
|
}
|
|
|
|
/**
|
|
* Add dropdown icon if menu item has children.
|
|
*
|
|
* @param string $title The menu item's title.
|
|
* @param object $item The current menu item.
|
|
* @param array $args An array of wp_nav_menu() arguments.
|
|
* @param int $depth Depth of menu item. Used for padding.
|
|
* @return string $title The menu item's title with dropdown icon.
|
|
*/
|
|
function radcliffe_2_dropdown_icon_to_menu_link( $title, $item, $args, $depth ) {
|
|
if ( 'menu-1' === $args->theme_location ) {
|
|
foreach ( $item->classes as $value ) {
|
|
if ( 'menu-item-has-children' === $value || 'page_item_has_children' === $value ) {
|
|
$title = $title . radcliffe_2_get_svg( array( 'icon' => 'expand' ) );
|
|
}
|
|
}
|
|
}
|
|
|
|
return $title;
|
|
}
|
|
add_filter( 'nav_menu_item_title', 'radcliffe_2_dropdown_icon_to_menu_link', 10, 4 );
|