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b8bf6de0ed
When using Google Fonts, pre-connect to https://fonts.gstatic.com to improve the performance downloading the webfont files. Props westonruter. Fixes #44668. Built from https://develop.svn.wordpress.org/trunk@43606 git-svn-id: http://core.svn.wordpress.org/trunk@43435 1a063a9b-81f0-0310-95a4-ce76da25c4cd
484 lines
15 KiB
PHP
484 lines
15 KiB
PHP
<?php
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/**
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* Twenty Sixteen functions and definitions
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*
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* Set up the theme and provides some helper functions, which are used in the
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* theme as custom template tags. Others are attached to action and filter
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* hooks in WordPress to change core functionality.
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*
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* When using a child theme you can override certain functions (those wrapped
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* in a function_exists() call) by defining them first in your child theme's
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* functions.php file. The child theme's functions.php file is included before
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* the parent theme's file, so the child theme functions would be used.
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*
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* @link https://codex.wordpress.org/Theme_Development
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* @link https://codex.wordpress.org/Child_Themes
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*
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* Functions that are not pluggable (not wrapped in function_exists()) are
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* instead attached to a filter or action hook.
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*
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* For more information on hooks, actions, and filters,
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* {@link https://codex.wordpress.org/Plugin_API}
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*
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* @package WordPress
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* @subpackage Twenty_Sixteen
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* @since Twenty Sixteen 1.0
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*/
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/**
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* Twenty Sixteen only works in WordPress 4.4 or later.
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*/
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if ( version_compare( $GLOBALS['wp_version'], '4.4-alpha', '<' ) ) {
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require get_template_directory() . '/inc/back-compat.php';
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}
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if ( ! function_exists( 'twentysixteen_setup' ) ) :
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/**
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* Sets up theme defaults and registers support for various WordPress features.
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*
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* Note that this function is hooked into the after_setup_theme hook, which
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* runs before the init hook. The init hook is too late for some features, such
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* as indicating support for post thumbnails.
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*
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* Create your own twentysixteen_setup() function to override in a child theme.
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*
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* @since Twenty Sixteen 1.0
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*/
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function twentysixteen_setup() {
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/*
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* Make theme available for translation.
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* Translations can be filed at WordPress.org. See: https://translate.wordpress.org/projects/wp-themes/twentysixteen
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* If you're building a theme based on Twenty Sixteen, use a find and replace
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* to change 'twentysixteen' to the name of your theme in all the template files
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*/
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load_theme_textdomain( 'twentysixteen' );
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// Add default posts and comments RSS feed links to head.
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add_theme_support( 'automatic-feed-links' );
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/*
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* Let WordPress manage the document title.
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* By adding theme support, we declare that this theme does not use a
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* hard-coded <title> tag in the document head, and expect WordPress to
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* provide it for us.
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*/
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add_theme_support( 'title-tag' );
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/*
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* Enable support for custom logo.
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*
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* @since Twenty Sixteen 1.2
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*/
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add_theme_support(
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'custom-logo',
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array(
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'height' => 240,
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'width' => 240,
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'flex-height' => true,
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)
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);
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/*
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* Enable support for Post Thumbnails on posts and pages.
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*
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* @link https://codex.wordpress.org/Function_Reference/add_theme_support#Post_Thumbnails
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*/
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add_theme_support( 'post-thumbnails' );
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set_post_thumbnail_size( 1200, 9999 );
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// This theme uses wp_nav_menu() in two locations.
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register_nav_menus(
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array(
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'primary' => __( 'Primary Menu', 'twentysixteen' ),
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'social' => __( 'Social Links Menu', 'twentysixteen' ),
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)
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);
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/*
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* Switch default core markup for search form, comment form, and comments
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* to output valid HTML5.
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*/
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add_theme_support(
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'html5',
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array(
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'search-form',
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'comment-form',
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'comment-list',
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'gallery',
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'caption',
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)
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);
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/*
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* Enable support for Post Formats.
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*
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* See: https://codex.wordpress.org/Post_Formats
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*/
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add_theme_support(
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'post-formats',
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array(
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'aside',
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'image',
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'video',
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'quote',
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'link',
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'gallery',
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'status',
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'audio',
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'chat',
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)
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);
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/*
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* This theme styles the visual editor to resemble the theme style,
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* specifically font, colors, icons, and column width.
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*/
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add_editor_style( array( 'css/editor-style.css', twentysixteen_fonts_url() ) );
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// Indicate widget sidebars can use selective refresh in the Customizer.
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add_theme_support( 'customize-selective-refresh-widgets' );
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}
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endif; // twentysixteen_setup
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add_action( 'after_setup_theme', 'twentysixteen_setup' );
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/**
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* Sets the content width in pixels, based on the theme's design and stylesheet.
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*
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* Priority 0 to make it available to lower priority callbacks.
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*
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* @global int $content_width
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*
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* @since Twenty Sixteen 1.0
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*/
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function twentysixteen_content_width() {
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$GLOBALS['content_width'] = apply_filters( 'twentysixteen_content_width', 840 );
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}
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add_action( 'after_setup_theme', 'twentysixteen_content_width', 0 );
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/**
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* Add preconnect for Google Fonts.
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*
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* @since Twenty Sixteen 1.6
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*
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* @param array $urls URLs to print for resource hints.
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* @param string $relation_type The relation type the URLs are printed.
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* @return array $urls URLs to print for resource hints.
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*/
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function twentysixteen_resource_hints( $urls, $relation_type ) {
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if ( wp_style_is( 'twentysixteen-fonts', 'queue' ) && 'preconnect' === $relation_type ) {
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$urls[] = array(
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'href' => 'https://fonts.gstatic.com',
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'crossorigin',
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);
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}
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return $urls;
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}
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add_filter( 'wp_resource_hints', 'twentysixteen_resource_hints', 10, 2 );
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/**
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* Registers a widget area.
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*
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* @link https://developer.wordpress.org/reference/functions/register_sidebar/
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*
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* @since Twenty Sixteen 1.0
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*/
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function twentysixteen_widgets_init() {
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register_sidebar(
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array(
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'name' => __( 'Sidebar', 'twentysixteen' ),
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'id' => 'sidebar-1',
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'description' => __( 'Add widgets here to appear in your sidebar.', 'twentysixteen' ),
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'before_widget' => '<section id="%1$s" class="widget %2$s">',
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'after_widget' => '</section>',
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'before_title' => '<h2 class="widget-title">',
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'after_title' => '</h2>',
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)
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);
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register_sidebar(
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array(
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'name' => __( 'Content Bottom 1', 'twentysixteen' ),
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'id' => 'sidebar-2',
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'description' => __( 'Appears at the bottom of the content on posts and pages.', 'twentysixteen' ),
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'before_widget' => '<section id="%1$s" class="widget %2$s">',
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'after_widget' => '</section>',
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'before_title' => '<h2 class="widget-title">',
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'after_title' => '</h2>',
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)
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);
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register_sidebar(
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array(
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'name' => __( 'Content Bottom 2', 'twentysixteen' ),
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'id' => 'sidebar-3',
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'description' => __( 'Appears at the bottom of the content on posts and pages.', 'twentysixteen' ),
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'before_widget' => '<section id="%1$s" class="widget %2$s">',
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'after_widget' => '</section>',
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'before_title' => '<h2 class="widget-title">',
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'after_title' => '</h2>',
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)
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);
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}
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add_action( 'widgets_init', 'twentysixteen_widgets_init' );
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if ( ! function_exists( 'twentysixteen_fonts_url' ) ) :
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/**
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* Register Google fonts for Twenty Sixteen.
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*
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* Create your own twentysixteen_fonts_url() function to override in a child theme.
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*
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* @since Twenty Sixteen 1.0
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*
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* @return string Google fonts URL for the theme.
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*/
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function twentysixteen_fonts_url() {
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$fonts_url = '';
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$fonts = array();
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$subsets = 'latin,latin-ext';
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/* 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. */
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if ( 'off' !== _x( 'on', 'Merriweather font: on or off', 'twentysixteen' ) ) {
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$fonts[] = 'Merriweather:400,700,900,400italic,700italic,900italic';
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}
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/* translators: If there are characters in your language that are not supported by Montserrat, translate this to 'off'. Do not translate into your own language. */
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if ( 'off' !== _x( 'on', 'Montserrat font: on or off', 'twentysixteen' ) ) {
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$fonts[] = 'Montserrat:400,700';
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}
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/* 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. */
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if ( 'off' !== _x( 'on', 'Inconsolata font: on or off', 'twentysixteen' ) ) {
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$fonts[] = 'Inconsolata:400';
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}
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if ( $fonts ) {
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$fonts_url = add_query_arg(
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array(
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'family' => urlencode( implode( '|', $fonts ) ),
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'subset' => urlencode( $subsets ),
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),
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'https://fonts.googleapis.com/css'
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);
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}
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return $fonts_url;
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}
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endif;
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/**
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* Handles JavaScript detection.
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*
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* Adds a `js` class to the root `<html>` element when JavaScript is detected.
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*
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* @since Twenty Sixteen 1.0
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*/
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function twentysixteen_javascript_detection() {
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echo "<script>(function(html){html.className = html.className.replace(/\bno-js\b/,'js')})(document.documentElement);</script>\n";
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}
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add_action( 'wp_head', 'twentysixteen_javascript_detection', 0 );
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/**
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* Enqueues scripts and styles.
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*
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* @since Twenty Sixteen 1.0
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*/
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function twentysixteen_scripts() {
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// Add custom fonts, used in the main stylesheet.
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wp_enqueue_style( 'twentysixteen-fonts', twentysixteen_fonts_url(), array(), null );
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// Add Genericons, used in the main stylesheet.
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wp_enqueue_style( 'genericons', get_template_directory_uri() . '/genericons/genericons.css', array(), '3.4.1' );
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// Theme stylesheet.
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wp_enqueue_style( 'twentysixteen-style', get_stylesheet_uri() );
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// Load the Internet Explorer specific stylesheet.
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wp_enqueue_style( 'twentysixteen-ie', get_template_directory_uri() . '/css/ie.css', array( 'twentysixteen-style' ), '20160816' );
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wp_style_add_data( 'twentysixteen-ie', 'conditional', 'lt IE 10' );
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// Load the Internet Explorer 8 specific stylesheet.
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wp_enqueue_style( 'twentysixteen-ie8', get_template_directory_uri() . '/css/ie8.css', array( 'twentysixteen-style' ), '20160816' );
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wp_style_add_data( 'twentysixteen-ie8', 'conditional', 'lt IE 9' );
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// Load the Internet Explorer 7 specific stylesheet.
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wp_enqueue_style( 'twentysixteen-ie7', get_template_directory_uri() . '/css/ie7.css', array( 'twentysixteen-style' ), '20160816' );
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wp_style_add_data( 'twentysixteen-ie7', 'conditional', 'lt IE 8' );
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// Load the html5 shiv.
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wp_enqueue_script( 'twentysixteen-html5', get_template_directory_uri() . '/js/html5.js', array(), '3.7.3' );
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wp_script_add_data( 'twentysixteen-html5', 'conditional', 'lt IE 9' );
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wp_enqueue_script( 'twentysixteen-skip-link-focus-fix', get_template_directory_uri() . '/js/skip-link-focus-fix.js', array(), '20160816', true );
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if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) {
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wp_enqueue_script( 'comment-reply' );
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}
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if ( is_singular() && wp_attachment_is_image() ) {
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wp_enqueue_script( 'twentysixteen-keyboard-image-navigation', get_template_directory_uri() . '/js/keyboard-image-navigation.js', array( 'jquery' ), '20160816' );
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}
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wp_enqueue_script( 'twentysixteen-script', get_template_directory_uri() . '/js/functions.js', array( 'jquery' ), '20160816', true );
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wp_localize_script(
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'twentysixteen-script',
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'screenReaderText',
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array(
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'expand' => __( 'expand child menu', 'twentysixteen' ),
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'collapse' => __( 'collapse child menu', 'twentysixteen' ),
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)
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);
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}
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add_action( 'wp_enqueue_scripts', 'twentysixteen_scripts' );
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/**
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* Adds custom classes to the array of body classes.
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*
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* @since Twenty Sixteen 1.0
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*
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* @param array $classes Classes for the body element.
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* @return array (Maybe) filtered body classes.
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*/
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function twentysixteen_body_classes( $classes ) {
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// Adds a class of custom-background-image to sites with a custom background image.
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if ( get_background_image() ) {
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$classes[] = 'custom-background-image';
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}
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// Adds a class of group-blog to sites with more than 1 published author.
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if ( is_multi_author() ) {
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$classes[] = 'group-blog';
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}
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// Adds a class of no-sidebar to sites without active sidebar.
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if ( ! is_active_sidebar( 'sidebar-1' ) ) {
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$classes[] = 'no-sidebar';
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}
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// Adds a class of hfeed to non-singular pages.
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if ( ! is_singular() ) {
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$classes[] = 'hfeed';
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}
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return $classes;
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}
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add_filter( 'body_class', 'twentysixteen_body_classes' );
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/**
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* Converts a HEX value to RGB.
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*
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* @since Twenty Sixteen 1.0
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*
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* @param string $color The original color, in 3- or 6-digit hexadecimal form.
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* @return array Array containing RGB (red, green, and blue) values for the given
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* HEX code, empty array otherwise.
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*/
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function twentysixteen_hex2rgb( $color ) {
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$color = trim( $color, '#' );
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if ( strlen( $color ) === 3 ) {
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$r = hexdec( substr( $color, 0, 1 ) . substr( $color, 0, 1 ) );
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$g = hexdec( substr( $color, 1, 1 ) . substr( $color, 1, 1 ) );
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$b = hexdec( substr( $color, 2, 1 ) . substr( $color, 2, 1 ) );
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} elseif ( strlen( $color ) === 6 ) {
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$r = hexdec( substr( $color, 0, 2 ) );
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$g = hexdec( substr( $color, 2, 2 ) );
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$b = hexdec( substr( $color, 4, 2 ) );
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} else {
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return array();
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}
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return array(
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'red' => $r,
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'green' => $g,
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'blue' => $b,
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);
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}
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/**
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* Custom template tags for this theme.
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*/
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require get_template_directory() . '/inc/template-tags.php';
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/**
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* Customizer additions.
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*/
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require get_template_directory() . '/inc/customizer.php';
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/**
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* Add custom image sizes attribute to enhance responsive image functionality
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* for content images
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*
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* @since Twenty Sixteen 1.0
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*
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* @param string $sizes A source size value for use in a 'sizes' attribute.
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* @param array $size Image size. Accepts an array of width and height
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* values in pixels (in that order).
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* @return string A source size value for use in a content image 'sizes' attribute.
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*/
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function twentysixteen_content_image_sizes_attr( $sizes, $size ) {
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$width = $size[0];
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if ( 840 <= $width ) {
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$sizes = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px';
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}
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if ( 'page' === get_post_type() ) {
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if ( 840 > $width ) {
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$sizes = '(max-width: ' . $width . 'px) 85vw, ' . $width . 'px';
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}
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} else {
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if ( 840 > $width && 600 <= $width ) {
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$sizes = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 984px) 61vw, (max-width: 1362px) 45vw, 600px';
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} elseif ( 600 > $width ) {
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$sizes = '(max-width: ' . $width . 'px) 85vw, ' . $width . 'px';
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}
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}
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return $sizes;
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}
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add_filter( 'wp_calculate_image_sizes', 'twentysixteen_content_image_sizes_attr', 10, 2 );
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/**
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* Add custom image sizes attribute to enhance responsive image functionality
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* for post thumbnails
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*
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* @since Twenty Sixteen 1.0
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*
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* @param array $attr Attributes for the image markup.
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* @param int $attachment Image attachment ID.
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* @param array $size Registered image size or flat array of height and width dimensions.
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* @return array The filtered attributes for the image markup.
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*/
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function twentysixteen_post_thumbnail_sizes_attr( $attr, $attachment, $size ) {
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if ( 'post-thumbnail' === $size ) {
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if ( is_active_sidebar( 'sidebar-1' ) ) {
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$attr['sizes'] = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 984px) 60vw, (max-width: 1362px) 62vw, 840px';
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} else {
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$attr['sizes'] = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 88vw, 1200px';
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}
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}
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return $attr;
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}
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add_filter( 'wp_get_attachment_image_attributes', 'twentysixteen_post_thumbnail_sizes_attr', 10, 3 );
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/**
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* Modifies tag cloud widget arguments to display all tags in the same font size
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* and use list format for better accessibility.
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*
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* @since Twenty Sixteen 1.1
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*
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* @param array $args Arguments for tag cloud widget.
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* @return array The filtered arguments for tag cloud widget.
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*/
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function twentysixteen_widget_tag_cloud_args( $args ) {
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$args['largest'] = 1;
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$args['smallest'] = 1;
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$args['unit'] = 'em';
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$args['format'] = 'list';
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return $args;
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}
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add_filter( 'widget_tag_cloud_args', 'twentysixteen_widget_tag_cloud_args' );
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