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<?php
/**
* Twenty Fifteen 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_Fifteen
* @since Twenty Fifteen 1.0
*/
/**
* Set the content width based on the theme's design and stylesheet.
*
* @since Twenty Fifteen 1.0
*/
if ( ! isset( $content_width ) ) {
$content_width = 660;
}
/**
* Twenty Fifteen only works in WordPress 4.1 or later.
*/
if ( version_compare( $GLOBALS['wp_version'], '4.1-alpha', '<' ) ) {
require get_template_directory() . '/inc/back-compat.php';
}
if ( ! function_exists( 'twentyfifteen_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.
*
* @since Twenty Fifteen 1.0
*/
function twentyfifteen_setup() {
/*
* Make theme available for translation.
* Translations can be filed in the /languages/ directory.
* If you're building a theme based on twentyfifteen, use a find and replace
* to change 'twentyfifteen' to the name of your theme in all the template files
*/
load_theme_textdomain( 'twentyfifteen', 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.
*
* See: https://codex.wordpress.org/Function_Reference/add_theme_support#Post_Thumbnails
*/
add_theme_support( 'post-thumbnails' );
set_post_thumbnail_size( 825, 510, true );
// This theme uses wp_nav_menu() in two locations.
register_nav_menus( array(
'primary' => __( 'Primary Menu', 'twentyfifteen' ),
'social' => __( 'Social Links Menu', 'twentyfifteen' ),
) );
/*
* 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'
) );
/*
* Enable support for custom logo.
*
* @since Twenty Fifteen 1.5
*/
add_theme_support( 'custom-logo', array(
'height' => 248,
'width' => 248,
'flex-height' => true,
) );
$color_scheme = twentyfifteen_get_color_scheme();
$default_color = trim( $color_scheme[0], '#' );
// Setup the WordPress core custom background feature.
add_theme_support( 'custom-background', apply_filters( 'twentyfifteen_custom_background_args', array(
'default-color' => $default_color,
'default-attachment' => 'fixed',
) ) );
/*
* This theme styles the visual editor to resemble the theme style,
* specifically font, colors, icons, and column width.
*/
add_editor_style( array( 'css/editor-style.css', 'genericons/genericons.css', twentyfifteen_fonts_url() ) );
// Indicate widget sidebars can use selective refresh in the Customizer.
add_theme_support( 'customize-selective-refresh-widgets' );
}
endif; // twentyfifteen_setup
add_action( 'after_setup_theme', 'twentyfifteen_setup' );
/**
* Register widget area.
*
* @since Twenty Fifteen 1.0
*
* @link https://codex.wordpress.org/Function_Reference/register_sidebar
*/
function twentyfifteen_widgets_init() {
register_sidebar( array(
'name' => __( 'Widget Area', 'twentyfifteen' ),
'id' => 'sidebar-1',
'description' => __( 'Add widgets here to appear in your sidebar.', 'twentyfifteen' ),
'before_widget' => '<aside id="%1$s" class="widget %2$s">',
'after_widget' => '</aside>',
'before_title' => '<h2 class="widget-title">',
'after_title' => '</h2>',
) );
}
add_action( 'widgets_init', 'twentyfifteen_widgets_init' );
if ( ! function_exists( 'twentyfifteen_fonts_url' ) ) :
/**
* Register Google fonts for Twenty Fifteen.
*
* @since Twenty Fifteen 1.0
*
* @return string Google fonts URL for the theme.
*/
function twentyfifteen_fonts_url() {
$fonts_url = '';
$fonts = array();
$subsets = 'latin,latin-ext';
/*
* Translators: If there are characters in your language that are not supported
* by Noto Sans, translate this to 'off'. Do not translate into your own language.
*/
if ( 'off' !== _x( 'on', 'Noto Sans font: on or off', 'twentyfifteen' ) ) {
$fonts[] = 'Noto Sans:400italic,700italic,400,700';
}
/*
* Translators: If there are characters in your language that are not supported
* by Noto Serif, translate this to 'off'. Do not translate into your own language.
*/
if ( 'off' !== _x( 'on', 'Noto Serif font: on or off', 'twentyfifteen' ) ) {
$fonts[] = 'Noto Serif:400italic,700italic,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', 'twentyfifteen' ) ) {
$fonts[] = 'Inconsolata:400,700';
}
/*
* Translators: To add an additional character subset specific to your language,
* translate this to 'greek', 'cyrillic', 'devanagari' or 'vietnamese'. Do not translate into your own language.
*/
$subset = _x( 'no-subset', 'Add new subset (greek, cyrillic, devanagari, vietnamese)', 'twentyfifteen' );
if ( 'cyrillic' == $subset ) {
$subsets .= ',cyrillic,cyrillic-ext';
} elseif ( 'greek' == $subset ) {
$subsets .= ',greek,greek-ext';
} elseif ( 'devanagari' == $subset ) {
$subsets .= ',devanagari';
} elseif ( 'vietnamese' == $subset ) {
$subsets .= ',vietnamese';
}
if ( $fonts ) {
$fonts_url = add_query_arg( array(
'family' => urlencode( implode( '|', $fonts ) ),
'subset' => urlencode( $subsets ),
), 'https://fonts.googleapis.com/css' );
}
return $fonts_url;
}
endif;
/**
* JavaScript Detection.
*
* Adds a `js` class to the root `<html>` element when JavaScript is detected.
*
* @since Twenty Fifteen 1.1
*/
function twentyfifteen_javascript_detection() {
echo "<script>(function(html){html.className = html.className.replace(/\bno-js\b/,'js')})(document.documentElement);</script>\n";
}
add_action( 'wp_head', 'twentyfifteen_javascript_detection', 0 );
/**
* Enqueue scripts and styles.
*
* @since Twenty Fifteen 1.0
*/
function twentyfifteen_scripts() {
// Add custom fonts, used in the main stylesheet.
wp_enqueue_style( 'twentyfifteen-fonts', twentyfifteen_fonts_url(), array(), null );
// Add Genericons, used in the main stylesheet.
wp_enqueue_style( 'genericons', get_template_directory_uri() . '/genericons/genericons.css', array(), '3.2' );
// Load our main stylesheet.
wp_enqueue_style( 'twentyfifteen-style', get_stylesheet_uri() );
// Load the Internet Explorer specific stylesheet.
wp_enqueue_style( 'twentyfifteen-ie', get_template_directory_uri() . '/css/ie.css', array( 'twentyfifteen-style' ), '20141010' );
wp_style_add_data( 'twentyfifteen-ie', 'conditional', 'lt IE 9' );
// Load the Internet Explorer 7 specific stylesheet.
wp_enqueue_style( 'twentyfifteen-ie7', get_template_directory_uri() . '/css/ie7.css', array( 'twentyfifteen-style' ), '20141010' );
wp_style_add_data( 'twentyfifteen-ie7', 'conditional', 'lt IE 8' );
wp_enqueue_script( 'twentyfifteen-skip-link-focus-fix', get_template_directory_uri() . '/js/skip-link-focus-fix.js', array(), '20141010', 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( 'twentyfifteen-keyboard-image-navigation', get_template_directory_uri() . '/js/keyboard-image-navigation.js', array( 'jquery' ), '20141010' );
}
wp_enqueue_script( 'twentyfifteen-script', get_template_directory_uri() . '/js/functions.js', array( 'jquery' ), '20150330', true );
wp_localize_script( 'twentyfifteen-script', 'screenReaderText', array(
'expand' => '<span class="screen-reader-text">' . __( 'expand child menu', 'twentyfifteen' ) . '</span>',
'collapse' => '<span class="screen-reader-text">' . __( 'collapse child menu', 'twentyfifteen' ) . '</span>',
) );
}
add_action( 'wp_enqueue_scripts', 'twentyfifteen_scripts' );
/**
* Add featured image as background image to post navigation elements.
*
* @since Twenty Fifteen 1.0
*
* @see wp_add_inline_style()
*/
function twentyfifteen_post_nav_background() {
if ( ! is_single() ) {
return;
}
$previous = ( is_attachment() ) ? get_post( get_post()->post_parent ) : get_adjacent_post( false, '', true );
$next = get_adjacent_post( false, '', false );
$css = '';
if ( is_attachment() && 'attachment' == $previous->post_type ) {
return;
}
if ( $previous && has_post_thumbnail( $previous->ID ) ) {
$prevthumb = wp_get_attachment_image_src( get_post_thumbnail_id( $previous->ID ), 'post-thumbnail' );
$css .= '
.post-navigation .nav-previous { background-image: url(' . esc_url( $prevthumb[0] ) . '); }
.post-navigation .nav-previous .post-title, .post-navigation .nav-previous a:hover .post-title, .post-navigation .nav-previous .meta-nav { color: #fff; }
.post-navigation .nav-previous a:before { background-color: rgba(0, 0, 0, 0.4); }
';
}
if ( $next && has_post_thumbnail( $next->ID ) ) {
$nextthumb = wp_get_attachment_image_src( get_post_thumbnail_id( $next->ID ), 'post-thumbnail' );
$css .= '
.post-navigation .nav-next { background-image: url(' . esc_url( $nextthumb[0] ) . '); border-top: 0; }
.post-navigation .nav-next .post-title, .post-navigation .nav-next a:hover .post-title, .post-navigation .nav-next .meta-nav { color: #fff; }
.post-navigation .nav-next a:before { background-color: rgba(0, 0, 0, 0.4); }
';
}
wp_add_inline_style( 'twentyfifteen-style', $css );
}
add_action( 'wp_enqueue_scripts', 'twentyfifteen_post_nav_background' );
/**
* Display descriptions in main navigation.
*
* @since Twenty Fifteen 1.0
*
* @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 Menu item with possible description.
*/
function twentyfifteen_nav_description( $item_output, $item, $depth, $args ) {
if ( 'primary' == $args->theme_location && $item->description ) {
$item_output = str_replace( $args->link_after . '</a>', '<div class="menu-item-description">' . $item->description . '</div>' . $args->link_after . '</a>', $item_output );
}
return $item_output;
}
add_filter( 'walker_nav_menu_start_el', 'twentyfifteen_nav_description', 10, 4 );
/**
* Add a `screen-reader-text` class to the search form's submit button.
*
* @since Twenty Fifteen 1.0
*
* @param string $html Search form HTML.
* @return string Modified search form HTML.
*/
function twentyfifteen_search_form_modify( $html ) {
return str_replace( 'class="search-submit"', 'class="search-submit screen-reader-text"', $html );
}
add_filter( 'get_search_form', 'twentyfifteen_search_form_modify' );
/**
* Implement the Custom Header feature.
*
* @since Twenty Fifteen 1.0
*/
require get_template_directory() . '/inc/custom-header.php';
/**
* Custom template tags for this theme.
*
* @since Twenty Fifteen 1.0
*/
require get_template_directory() . '/inc/template-tags.php';
/**
* Customizer additions.
*
* @since Twenty Fifteen 1.0
*/
require get_template_directory() . '/inc/customizer.php';