--- /dev/null
+<?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 in the /languages/ directory.
+ * 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', get_template_directory() . '/languages' );
+
+ // 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 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, 0, true );
+
+ // 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() ) );
+}
+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' ), '20150825' );
+ 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' ), '20150825' );
+ 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' ), '20150825' );
+ 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(), '20150825', 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' ), '20150825' );
+ }
+
+ wp_enqueue_script( 'twentysixteen-script', get_template_directory_uri() . '/js/functions.js', array( 'jquery' ), '20150825', 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 );
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