WordPress/wp-content/themes/twentyfourteen/functions.php

482 lines
15 KiB
PHP

<?php
/**
* Twenty Fourteen functions and definitions.
*
* Sets 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 (see http://codex.wordpress.org/Theme_Development
* and http://codex.wordpress.org/Child_Themes), 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.
*
* 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,
* see http://codex.wordpress.org/Plugin_API
*
* @package WordPress
* @subpackage Twenty_Fourteen
*/
/**
* Sets up the content width value based on the theme's design.
* @see twentyfourteen_content_width() for template-specific adjustments.
*/
if ( ! isset( $content_width ) )
$content_width = 474;
if ( ! function_exists( 'twentyfourteen_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 post thumbnails.
*/
function twentyfourteen_setup() {
/*
* Makes Twenty Fourteen available for translation.
*
* Translations can be added to the /languages/ directory.
* If you're building a theme based on Twenty Fourteen, use a find and
* replace to change 'twentyfourteen' to the name of your theme in all
* template files.
*/
load_theme_textdomain( 'twentyfourteen', get_template_directory() . '/languages' );
/*
* This theme styles the visual editor to resemble the theme style.
*/
add_editor_style( array( 'editor-style.css', twentyfourteen_font_url() ) );
// Adds RSS feed links to <head> for posts and comments.
add_theme_support( 'automatic-feed-links' );
// Enable support for Post Thumbnails.
add_theme_support( 'post-thumbnails', array( 'post' ) );
// Adding several sizes for Post Thumbnails.
add_image_size( 'featured-thumbnail-large', 672, 0 );
add_image_size( 'featured-thumbnail-featured', 672, 336, true );
add_image_size( 'featured-thumbnail-formatted', 306, 0 );
// This theme uses wp_nav_menu() in two locations.
register_nav_menus( array(
'primary' => __( 'Top primary menu', 'twentyfourteen' ),
'secondary' => __( 'Secondary menu in left sidebar', 'twentyfourteen' ),
) );
/*
* Switches 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',
) );
/*
* Enable support for Post Formats.
* See http://codex.wordpress.org/Post_Formats
*/
add_theme_support( 'post-formats', array(
'aside', 'image', 'video', 'quote', 'link', 'gallery',
) );
/*
* This theme allows users to set a custom background.
*/
add_theme_support( 'custom-background', apply_filters( 'twentyfourteen_custom_background_args', array(
'default-color' => 'f5f5f5',
) ) );
}
endif; // twentyfourteen_setup
add_action( 'after_setup_theme', 'twentyfourteen_setup' );
/**
* Adjusts content_width value for full width and attachment templates.
*
* @return void
*/
function twentyfourteen_content_width() {
if ( is_page_template( 'full-width-page.php' ) || is_attachment() )
$GLOBALS['content_width'] = 895;
}
add_action( 'template_redirect', 'twentyfourteen_content_width' );
/**
* Getter function for Featured Content Plugin.
*/
function twentyfourteen_get_featured_posts() {
return apply_filters( 'twentyfourteen_get_featured_posts', false );
}
/**
* A helper conditional function that returns a boolean value
* So that we can use a condition like
* if ( twentyfourteen_has_featured_posts( 1 ) )
*/
function twentyfourteen_has_featured_posts( $minimum = 1 ) {
if ( is_paged() )
return false;
$featured_posts = apply_filters( 'twentyfourteen_get_featured_posts', array() );
return is_array( $featured_posts ) && count( $featured_posts ) > absint( $minimum );
}
/**
* Registers two widget areas.
*
* @return void
*/
function twentyfourteen_widgets_init() {
require get_template_directory() . '/inc/widgets.php';
register_widget( 'Twenty_Fourteen_Ephemera_Widget' );
register_sidebar( array(
'name' => __( 'Primary Sidebar', 'twentyfourteen' ),
'id' => 'sidebar-1',
'description' => __( 'Main sidebar that appears on the left.', 'twentyfourteen' ),
'before_widget' => '<aside id="%1$s" class="widget %2$s">',
'after_widget' => '</aside>',
'before_title' => '<h1 class="widget-title">',
'after_title' => '</h1>',
) );
register_sidebar( array(
'name' => __( 'Front Page Sidebar', 'twentyfourteen' ),
'id' => 'sidebar-2',
'description' => __( 'Additional sidebar that appears on the right, on the home page.', 'twentyfourteen' ),
'before_widget' => '<aside id="%1$s" class="widget %2$s">',
'after_widget' => '</aside>',
'before_title' => '<h1 class="widget-title">',
'after_title' => '</h1>',
) );
register_sidebar( array(
'name' => __( 'Content Sidebar', 'twentyfourteen' ),
'id' => 'sidebar-3',
'description' => __( 'Additional sidebar that appears on the right, on single posts and pages.', 'twentyfourteen' ),
'before_widget' => '<aside id="%1$s" class="widget %2$s">',
'after_widget' => '</aside>',
'before_title' => '<h1 class="widget-title">',
'after_title' => '</h1>',
) );
register_sidebar( array(
'name' => __( 'Footer Widget Area', 'twentyfourteen' ),
'id' => 'sidebar-4',
'description' => __( 'Appears in the footer section of the site.', 'twentyfourteen' ),
'before_widget' => '<aside id="%1$s" class="widget %2$s">',
'after_widget' => '</aside>',
'before_title' => '<h1 class="widget-title">',
'after_title' => '</h1>',
) );
}
add_action( 'widgets_init', 'twentyfourteen_widgets_init' );
/**
* Register Lato Google font for Twenty Fourteen.
*
* @return void
*/
function twentyfourteen_font_url() {
$font_url = '';
/*
* Translators: If there are characters in your language that are not supported
* by Lato, translate this to 'off'. Do not translate into your own language.
*/
if ( 'off' !== _x( 'on', 'Lato font: on or off', 'twentyfourteen' ) )
$font_url = add_query_arg( 'family', urlencode( 'Lato:100,300,400,700,900,100italic,300italic,400italic,700italic,900italic' ), "//fonts.googleapis.com/css" );
return $font_url;
}
/**
* Enqueues scripts and styles for front end.
*
* @return void
*/
function twentyfourteen_scripts() {
// Add Lato font, used in the main stylesheet.
wp_enqueue_style( 'twentyfourteen-lato' );
// Add Genericons font, used in the main stylesheet.
wp_enqueue_style( 'twentyfourteen-genericons', get_template_directory_uri() . '/fonts/genericons.css', array(), '2.09' );
// Loads our main stylesheet.
wp_enqueue_style( 'twentyfourteen-style', get_stylesheet_uri() );
if ( is_singular() && comments_open() && get_option( 'thread_comments' ) )
wp_enqueue_script( 'comment-reply' );
if ( is_singular() && wp_attachment_is_image() )
wp_enqueue_script( 'twentyfourteen-keyboard-image-navigation', get_template_directory_uri() . '/js/keyboard-image-navigation.js', array( 'jquery' ), '20130402' );
if ( is_active_sidebar( 'sidebar-3' ) )
wp_enqueue_script( 'jquery-masonry' );
wp_enqueue_script( 'twentyfourteen-theme', get_template_directory_uri() . '/js/theme.js', array( 'jquery' ), '20130820', true );
// Add Lato font used in the main stylesheet.
wp_enqueue_style( 'twentyfourteen-lato', twentyfourteen_font_url(), array(), null );
}
add_action( 'wp_enqueue_scripts', 'twentyfourteen_scripts' );
/**
* Enqueue Google fonts style to admin screen for custom header display.
*
* @return void
*/
function twentyfourteen_admin_fonts() {
wp_enqueue_style( 'twentyfourteen-lato' );
}
add_action( 'admin_print_scripts-appearance_page_custom-header', 'twentyfourteen_admin_fonts' );
/**
* Sets the post excerpt length to 20 words.
*
* @param int $length
* @return int
*/
function twentyfourteen_excerpt_length( $length ) {
return 20;
}
add_filter( 'excerpt_length', 'twentyfourteen_excerpt_length' );
/**
* Returns a "Continue Reading" link for excerpts
*
* @return string
*/
function twentyfourteen_continue_reading_link() {
return ' <a href="'. esc_url( get_permalink() ) . '" class="more-link">' . __( 'Read More <span class="meta-nav">&rarr;</span>', 'twentyfourteen' ) . '</a>';
}
/**
* Replaces "[...]" (appended to automatically generated excerpts) with an
* ellipsis and twentyeleven_continue_reading_link().
*
* @param string $more
* @return string
*/
function twentyfourteen_auto_excerpt_more( $more ) {
return ' &hellip;' . twentyfourteen_continue_reading_link();
}
add_filter( 'excerpt_more', 'twentyfourteen_auto_excerpt_more' );
/**
* Adds a pretty "Continue Reading" link to custom post excerpts.
*
* To override this link in a child theme, remove the filter and add your own
* function tied to the get_the_excerpt filter hook.
*
* @param string $output
* @return string
*/
function twentyfourteen_custom_excerpt_more( $output ) {
if ( has_excerpt() && ! is_attachment() ) {
$output .= twentyfourteen_continue_reading_link();
}
return $output;
}
add_filter( 'get_the_excerpt', 'twentyfourteen_custom_excerpt_more' );
if ( ! function_exists( 'twentyfourteen_the_attached_image' ) ) :
/**
* Prints the attached image with a link to the next attached image.
*
* @return void
*/
function twentyfourteen_the_attached_image() {
$post = get_post();
$attachment_size = apply_filters( 'twentyfourteen_attachment_size', array( 1200, 1200 ) );
$next_attachment_url = wp_get_attachment_url();
/**
* Grab the IDs of all the image attachments in a gallery so we can get the URL
* of the next adjacent image in a gallery, or the first image (if we're
* looking at the last image in a gallery), or, in a gallery of one, just the
* link to that image file.
*/
$attachment_ids = get_posts( array(
'post_parent' => $post->post_parent,
'fields' => 'ids',
'numberposts' => -1,
'post_status' => 'inherit',
'post_type' => 'attachment',
'post_mime_type' => 'image',
'order' => 'ASC',
'orderby' => 'menu_order ID',
) );
// If there is more than 1 attachment in a gallery...
if ( count( $attachment_ids ) > 1 ) {
foreach ( $attachment_ids as $attachment_id ) {
if ( $attachment_id == $post->ID ) {
$next_id = current( $attachment_ids );
break;
}
}
// get the URL of the next image attachment...
if ( $next_id )
$next_attachment_url = get_attachment_link( $next_id );
// or get the URL of the first image attachment.
else
$next_attachment_url = get_attachment_link( array_shift( $attachment_ids ) );
}
printf( '<a href="%1$s" title="%2$s" rel="attachment">%3$s</a>',
esc_url( $next_attachment_url ),
the_title_attribute( array( 'echo' => false ) ),
wp_get_attachment_image( $post->ID, $attachment_size )
);
}
endif;
/**
* Gets recent formatted posts that are not featured in FC plugin.
*
*/
function twentyfourteen_get_recent( $post_format ) {
$args = array(
'order' => 'DESC',
'ignore_sticky_posts' => 1,
'posts_per_page' => 2,
'tax_query' => array(
array(
'taxonomy' => 'post_format',
'terms' => array( $post_format ),
'field' => 'slug',
'operator' => 'IN',
),
),
'no_found_rows' => true,
);
$featured_posts = twentyfourteen_get_featured_posts();
if ( is_array( $featured_posts ) && ! empty( $featured_posts ) )
$args['post__not_in'] = wp_list_pluck( $featured_posts, 'ID' );
return new WP_Query( $args );
}
/**
* Filter the home page posts, and remove formatted posts visible in the sidebar from it
*
*/
function twentyfourteen_pre_get_posts( $query ) {
// Bail if not home, not a query, not main query.
if ( ! $query->is_main_query() || is_admin() )
return;
// Only on the home page
if ( $query->is_home() ) {
$exclude_ids = array();
$videos = twentyfourteen_get_recent( 'post-format-video' );
$images = twentyfourteen_get_recent( 'post-format-image' );
$galleries = twentyfourteen_get_recent( 'post-format-gallery' );
$asides = twentyfourteen_get_recent( 'post-format-aside' );
$links = twentyfourteen_get_recent( 'post-format-link' );
$quotes = twentyfourteen_get_recent( 'post-format-quote' );
foreach ( $videos->posts as $post )
$exclude_ids[] = $post->ID;
foreach ( $images->posts as $post )
$exclude_ids[] = $post->ID;
foreach ( $galleries->posts as $post )
$exclude_ids[] = $post->ID;
foreach ( $asides->posts as $post )
$exclude_ids[] = $post->ID;
foreach ( $links->posts as $post )
$exclude_ids[] = $post->ID;
foreach ( $quotes->posts as $post )
$exclude_ids[] = $post->ID;
$query->set( 'post__not_in', $exclude_ids );
}
}
add_action( 'pre_get_posts', 'twentyfourteen_pre_get_posts' );
/**
* Extends the default WordPress body classes.
*
* Adds body classes to denote:
* 1. Single or multiple authors.
* 2. Index views.
*
* @param array $classes A list of existing body class values.
* @return array The filtered body class list.
*/
function twentyfourteen_body_classes( $classes ) {
// Adds a class of group-blog to blogs with more than 1 published author
if ( is_multi_author() ) {
$classes[] = 'group-blog';
}
if ( is_archive() || is_search() || is_home() ) {
$classes[] = 'list-view';
}
return $classes;
}
add_filter( 'body_class', 'twentyfourteen_body_classes' );
/**
* Creates a nicely formatted and more specific title element text for output
* in head of document, based on current view.
*
* @param string $title Default title text for current view.
* @param string $sep Optional separator.
* @return string The filtered title.
*/
function twentyfourteen_wp_title( $title, $sep ) {
global $paged, $page;
if ( is_feed() )
return $title;
// Add the site name.
$title .= get_bloginfo( 'name' );
// Add the site description for the home/front page.
$site_description = get_bloginfo( 'description', 'display' );
if ( $site_description && ( is_home() || is_front_page() ) )
$title = "$title $sep $site_description";
// Add a page number if necessary.
if ( $paged >= 2 || $page >= 2 )
$title = "$title $sep " . sprintf( __( 'Page %s', 'twentyfourteen' ), max( $paged, $page ) );
return $title;
}
add_filter( 'wp_title', 'twentyfourteen_wp_title', 10, 2 );
/**
* Implement the Custom Header feature
*
*/
require get_template_directory() . '/inc/custom-header.php';
/**
* Custom template tags for this theme.
*/
require get_template_directory() . '/inc/template-tags.php';
/**
* Customizer additions
*/
require get_template_directory() . '/inc/customizer.php';