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<?php
/**
* Twenty Sixteen functions and definitions
*
* Set up the theme and provides some helper functions, which are used in the
* theme as custom template tags. Others are attached to action and filter
* hooks in WordPress to change core functionality.
*
* When using a child theme you can override certain functions (those wrapped
* in a function_exists() call) by defining them first in your child theme's
* functions.php file. The child theme's functions.php file is included before
* the parent theme's file, so the child theme functions would be used.
*
* @link https://codex.wordpress.org/Theme_Development
* @link https://codex.wordpress.org/Child_Themes
*
* Functions that are not pluggable (not wrapped in function_exists()) are
* instead attached to a filter or action hook.
*
* For more information on hooks, actions, and filters,
* {@link https://codex.wordpress.org/Plugin_API}
*
* @package WordPress
* @subpackage Twenty_Sixteen
* @since Twenty Sixteen 1.0
*/
/**
* Twenty Sixteen only works in WordPress 4.4 or later.
*/
if ( version_compare( $GLOBALS['wp_version'], '4.4-alpha', '<' ) ) {
require get_template_directory() . '/inc/back-compat.php';
}
if ( ! function_exists( 'twentysixteen_setup' ) ) :
/**
* Sets up theme defaults and registers support for various WordPress features.
*
* Note that this function is hooked into the after_setup_theme hook, which
* runs before the init hook. The init hook is too late for some features, such
* as indicating support for post thumbnails.
*
* Create your own twentysixteen_setup() function to override in a child theme.
*
* @since Twenty Sixteen 1.0
*/
function twentysixteen_setup() {
/*
* Make theme available for translation.
* Translations can be filed at WordPress.org. See: https://translate.wordpress.org/projects/wp-themes/twentysixteen
* If you're building a theme based on Twenty Sixteen, use a find and replace
* to change 'twentysixteen' to the name of your theme in all the template files
*/
load_theme_textdomain( 'twentysixteen' );
// Add default posts and comments RSS feed links to head.
add_theme_support( 'automatic-feed-links' );
/*
* Let WordPress manage the document title.
* By adding theme support, we declare that this theme does not use a
* hard-coded <title> tag in the document head, and expect WordPress to
* provide it for us.
*/
add_theme_support( 'title-tag' );
/*
* Enable support for custom logo.
*
* @since Twenty Sixteen 1.2
*/
add_theme_support( 'custom-logo', array(
'height' => 240,
'width' => 240,
'flex-height' => true,
) );
/*
* Enable support for Post Thumbnails on posts and pages.
*
* @link http://codex.wordpress.org/Function_Reference/add_theme_support#Post_Thumbnails
*/
add_theme_support( 'post-thumbnails' );
set_post_thumbnail_size( 1200, 9999 );
// This theme uses wp_nav_menu() in two locations.
register_nav_menus( array(
'primary' => __( 'Primary Menu', 'twentysixteen' ),
'social' => __( 'Social Links Menu', 'twentysixteen' ),
) );
/*
* Switch default core markup for search form, comment form, and comments
* to output valid HTML5.
*/
add_theme_support( 'html5', array(
'search-form',
'comment-form',
'comment-list',
'gallery',
'caption',
) );
/*
* Enable support for Post Formats.
*
* See: https://codex.wordpress.org/Post_Formats
*/
add_theme_support( 'post-formats', array(
'aside',
'image',
'video',
'quote',
'link',
'gallery',
'status',
'audio',
'chat',
) );
/*
* This theme styles the visual editor to resemble the theme style,
* specifically font, colors, icons, and column width.
*/
add_editor_style( array( 'css/editor-style.css', twentysixteen_fonts_url() ) );
// Indicate widget sidebars can use selective refresh in the Customizer.
add_theme_support( 'customize-selective-refresh-widgets' );
}
endif; // twentysixteen_setup
add_action( 'after_setup_theme', 'twentysixteen_setup' );
/**
* Sets the content width in pixels, based on the theme's design and stylesheet.
*
* Priority 0 to make it available to lower priority callbacks.
*
* @global int $content_width
*
* @since Twenty Sixteen 1.0
*/
function twentysixteen_content_width() {
$GLOBALS['content_width'] = apply_filters( 'twentysixteen_content_width', 840 );
}
add_action( 'after_setup_theme', 'twentysixteen_content_width', 0 );
/**
* Registers a widget area.
*
* @link https://developer.wordpress.org/reference/functions/register_sidebar/
*
* @since Twenty Sixteen 1.0
*/
function twentysixteen_widgets_init() {
register_sidebar( array(
'name' => __( 'Sidebar', 'twentysixteen' ),
'id' => 'sidebar-1',
'description' => __( 'Add widgets here to appear in your sidebar.', 'twentysixteen' ),
'before_widget' => '<section id="%1$s" class="widget %2$s">',
'after_widget' => '</section>',
'before_title' => '<h2 class="widget-title">',
'after_title' => '</h2>',
) );
register_sidebar( array(
'name' => __( 'Content Bottom 1', 'twentysixteen' ),
'id' => 'sidebar-2',
'description' => __( 'Appears at the bottom of the content on posts and pages.', 'twentysixteen' ),
'before_widget' => '<section id="%1$s" class="widget %2$s">',
'after_widget' => '</section>',
'before_title' => '<h2 class="widget-title">',
'after_title' => '</h2>',
) );
register_sidebar( array(
'name' => __( 'Content Bottom 2', 'twentysixteen' ),
'id' => 'sidebar-3',
'description' => __( 'Appears at the bottom of the content on posts and pages.', 'twentysixteen' ),
'before_widget' => '<section id="%1$s" class="widget %2$s">',
'after_widget' => '</section>',
'before_title' => '<h2 class="widget-title">',
'after_title' => '</h2>',
) );
}
add_action( 'widgets_init', 'twentysixteen_widgets_init' );
if ( ! function_exists( 'twentysixteen_fonts_url' ) ) :
/**
* Register Google fonts for Twenty Sixteen.
*
* Create your own twentysixteen_fonts_url() function to override in a child theme.
*
* @since Twenty Sixteen 1.0
*
* @return string Google fonts URL for the theme.
*/
function twentysixteen_fonts_url() {
$fonts_url = '';
$fonts = array();
$subsets = 'latin,latin-ext';
/* translators: If there are characters in your language that are not supported by Merriweather, translate this to 'off'. Do not translate into your own language. */
if ( 'off' !== _x( 'on', 'Merriweather font: on or off', 'twentysixteen' ) ) {
$fonts[] = 'Merriweather:400,700,900,400italic,700italic,900italic';
}
/* translators: If there are characters in your language that are not supported by Montserrat, translate this to 'off'. Do not translate into your own language. */
if ( 'off' !== _x( 'on', 'Montserrat font: on or off', 'twentysixteen' ) ) {
$fonts[] = 'Montserrat:400,700';
}
/* translators: If there are characters in your language that are not supported by Inconsolata, translate this to 'off'. Do not translate into your own language. */
if ( 'off' !== _x( 'on', 'Inconsolata font: on or off', 'twentysixteen' ) ) {
$fonts[] = 'Inconsolata:400';
}
if ( $fonts ) {
$fonts_url = add_query_arg( array(
'family' => urlencode( implode( '|', $fonts ) ),
'subset' => urlencode( $subsets ),
), 'https://fonts.googleapis.com/css' );
}
return $fonts_url;
}
endif;
/**
* Handles JavaScript detection.
*
* Adds a `js` class to the root `<html>` element when JavaScript is detected.
*
* @since Twenty Sixteen 1.0
*/
function twentysixteen_javascript_detection() {
echo "<script>(function(html){html.className = html.className.replace(/\bno-js\b/,'js')})(document.documentElement);</script>\n";
}
add_action( 'wp_head', 'twentysixteen_javascript_detection', 0 );
/**
* Enqueues scripts and styles.
*
* @since Twenty Sixteen 1.0
*/
function twentysixteen_scripts() {
// Add custom fonts, used in the main stylesheet.
wp_enqueue_style( 'twentysixteen-fonts', twentysixteen_fonts_url(), array(), null );
// Add Genericons, used in the main stylesheet.
wp_enqueue_style( 'genericons', get_template_directory_uri() . '/genericons/genericons.css', array(), '3.4.1' );
// Theme stylesheet.
wp_enqueue_style( 'twentysixteen-style', get_stylesheet_uri() );
// Load the Internet Explorer specific stylesheet.
wp_enqueue_style( 'twentysixteen-ie', get_template_directory_uri() . '/css/ie.css', array( 'twentysixteen-style' ), '20160816' );
wp_style_add_data( 'twentysixteen-ie', 'conditional', 'lt IE 10' );
// Load the Internet Explorer 8 specific stylesheet.
wp_enqueue_style( 'twentysixteen-ie8', get_template_directory_uri() . '/css/ie8.css', array( 'twentysixteen-style' ), '20160816' );
wp_style_add_data( 'twentysixteen-ie8', 'conditional', 'lt IE 9' );
// Load the Internet Explorer 7 specific stylesheet.
wp_enqueue_style( 'twentysixteen-ie7', get_template_directory_uri() . '/css/ie7.css', array( 'twentysixteen-style' ), '20160816' );
wp_style_add_data( 'twentysixteen-ie7', 'conditional', 'lt IE 8' );
// Load the html5 shiv.
wp_enqueue_script( 'twentysixteen-html5', get_template_directory_uri() . '/js/html5.js', array(), '3.7.3' );
wp_script_add_data( 'twentysixteen-html5', 'conditional', 'lt IE 9' );
wp_enqueue_script( 'twentysixteen-skip-link-focus-fix', get_template_directory_uri() . '/js/skip-link-focus-fix.js', array(), '20160816', true );
if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) {
wp_enqueue_script( 'comment-reply' );
}
if ( is_singular() && wp_attachment_is_image() ) {
wp_enqueue_script( 'twentysixteen-keyboard-image-navigation', get_template_directory_uri() . '/js/keyboard-image-navigation.js', array( 'jquery' ), '20160816' );
}
wp_enqueue_script( 'twentysixteen-script', get_template_directory_uri() . '/js/functions.js', array( 'jquery' ), '20160816', true );
wp_localize_script( 'twentysixteen-script', 'screenReaderText', array(
'expand' => __( 'expand child menu', 'twentysixteen' ),
'collapse' => __( 'collapse child menu', 'twentysixteen' ),
) );
}
add_action( 'wp_enqueue_scripts', 'twentysixteen_scripts' );
/**
* Adds custom classes to the array of body classes.
*
* @since Twenty Sixteen 1.0
*
* @param array $classes Classes for the body element.
* @return array (Maybe) filtered body classes.
*/
function twentysixteen_body_classes( $classes ) {
// Adds a class of custom-background-image to sites with a custom background image.
if ( get_background_image() ) {
$classes[] = 'custom-background-image';
}
// Adds a class of group-blog to sites with more than 1 published author.
if ( is_multi_author() ) {
$classes[] = 'group-blog';
}
// Adds a class of no-sidebar to sites without active sidebar.
if ( ! is_active_sidebar( 'sidebar-1' ) ) {
$classes[] = 'no-sidebar';
}
// Adds a class of hfeed to non-singular pages.
if ( ! is_singular() ) {
$classes[] = 'hfeed';
}
return $classes;
}
add_filter( 'body_class', 'twentysixteen_body_classes' );
/**
* Converts a HEX value to RGB.
*
* @since Twenty Sixteen 1.0
*
* @param string $color The original color, in 3- or 6-digit hexadecimal form.
* @return array Array containing RGB (red, green, and blue) values for the given
* HEX code, empty array otherwise.
*/
function twentysixteen_hex2rgb( $color ) {
$color = trim( $color, '#' );
if ( strlen( $color ) === 3 ) {
$r = hexdec( substr( $color, 0, 1 ).substr( $color, 0, 1 ) );
$g = hexdec( substr( $color, 1, 1 ).substr( $color, 1, 1 ) );
$b = hexdec( substr( $color, 2, 1 ).substr( $color, 2, 1 ) );
} else if ( strlen( $color ) === 6 ) {
$r = hexdec( substr( $color, 0, 2 ) );
$g = hexdec( substr( $color, 2, 2 ) );
$b = hexdec( substr( $color, 4, 2 ) );
} else {
return array();
}
return array( 'red' => $r, 'green' => $g, 'blue' => $b );
}
/**
* Custom template tags for this theme.
*/
require get_template_directory() . '/inc/template-tags.php';
/**
* Customizer additions.
*/
require get_template_directory() . '/inc/customizer.php';
/**
* Add custom image sizes attribute to enhance responsive image functionality
* for content images
*
* @since Twenty Sixteen 1.0
*
* @param string $sizes A source size value for use in a 'sizes' attribute.
* @param array $size Image size. Accepts an array of width and height
* values in pixels (in that order).
* @return string A source size value for use in a content image 'sizes' attribute.
*/
function twentysixteen_content_image_sizes_attr( $sizes, $size ) {
$width = $size[0];
840 <= $width && $sizes = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px';
if ( 'page' === get_post_type() ) {
840 > $width && $sizes = '(max-width: ' . $width . 'px) 85vw, ' . $width . 'px';
} else {
840 > $width && 600 <= $width && $sizes = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 984px) 61vw, (max-width: 1362px) 45vw, 600px';
600 > $width && $sizes = '(max-width: ' . $width . 'px) 85vw, ' . $width . 'px';
}
return $sizes;
}
add_filter( 'wp_calculate_image_sizes', 'twentysixteen_content_image_sizes_attr', 10 , 2 );
/**
* Add custom image sizes attribute to enhance responsive image functionality
* for post thumbnails
*
* @since Twenty Sixteen 1.0
*
* @param array $attr Attributes for the image markup.
* @param int $attachment Image attachment ID.
* @param array $size Registered image size or flat array of height and width dimensions.
* @return string A source size value for use in a post thumbnail 'sizes' attribute.
*/
function twentysixteen_post_thumbnail_sizes_attr( $attr, $attachment, $size ) {
if ( 'post-thumbnail' === $size ) {
is_active_sidebar( 'sidebar-1' ) && $attr['sizes'] = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 984px) 60vw, (max-width: 1362px) 62vw, 840px';
! is_active_sidebar( 'sidebar-1' ) && $attr['sizes'] = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 88vw, 1200px';
}
return $attr;
}
add_filter( 'wp_get_attachment_image_attributes', 'twentysixteen_post_thumbnail_sizes_attr', 10 , 3 );
/**
* Modifies tag cloud widget arguments to have all tags in the widget same font size.
*
* @since Twenty Sixteen 1.1
*
* @param array $args Arguments for tag cloud widget.
* @return array A new modified arguments.
*/
function twentysixteen_widget_tag_cloud_args( $args ) {
$args['largest'] = 1;
$args['smallest'] = 1;
$args['unit'] = 'em';
return $args;
}
add_filter( 'widget_tag_cloud_args', 'twentysixteen_widget_tag_cloud_args' );