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functions.php
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functions.php
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<?php
/**
* Twenty Eleven functions and definitions
*
* Sets up the theme and provides some helper functions. Some helper functions
* are used in the theme as custom template tags. Others are attached to action and
* filter hooks in WordPress to change core functionality.
*
* The first function, twentyeleven_setup(), sets up the theme by registering support
* for various features in WordPress, such as post thumbnails, navigation menus, and the like.
*
* 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. The hook can be removed by using remove_action() or
* remove_filter() and you can attach your own function to the hook.
*
* We can remove the parent theme's hook only after it is attached, which means we need to
* wait until setting up the child theme:
*
* <code>
* add_action( 'after_setup_theme', 'my_child_theme_setup' );
* function my_child_theme_setup() {
* // We are providing our own filter for excerpt_length (or using the unfiltered value)
* remove_filter( 'excerpt_length', 'twentyeleven_excerpt_length' );
* ...
* }
* </code>
*
* For more information on hooks, actions, and filters, see http://codex.wordpress.org/Plugin_API.
*
* @package WordPress
* @subpackage Twenty_Eleven
* @since Twenty Eleven 1.0
*/
/**
* Set the content width based on the theme's design and stylesheet.
*/
if ( ! isset( $content_width ) )
$content_width = 584;
/**
* Tell WordPress to run twentyeleven_setup() when the 'after_setup_theme' hook is run.
*/
add_action( 'after_setup_theme', 'twentyeleven_setup' );
if ( ! function_exists( 'twentyeleven_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.
*
* To override twentyeleven_setup() in a child theme, add your own twentyeleven_setup to your child theme's
* functions.php file.
*
* @uses load_theme_textdomain() For translation/localization support.
* @uses add_editor_style() To style the visual editor.
* @uses add_theme_support() To add support for post thumbnails, automatic feed links, and Post Formats.
* @uses register_nav_menus() To add support for navigation menus.
* @uses add_custom_background() To add support for a custom background.
* @uses add_custom_image_header() To add support for a custom header.
* @uses register_default_headers() To register the default custom header images provided with the theme.
* @uses set_post_thumbnail_size() To set a custom post thumbnail size.
*
* @since Twenty Eleven 1.0
*/
function twentyeleven_setup() {
/* Make Twenty Eleven available for translation.
* Translations can be added to the /languages/ directory.
* If you're building a theme based on Twenty Eleven, use a find and replace
* to change 'twentyeleven' to the name of your theme in all the template files.
*/
load_theme_textdomain( 'twentyeleven', TEMPLATEPATH . '/languages' );
$locale = get_locale();
$locale_file = TEMPLATEPATH . "/languages/$locale.php";
if ( is_readable( $locale_file ) )
require_once( $locale_file );
// This theme styles the visual editor with editor-style.css to match the theme style.
add_editor_style();
// Load up our theme options page and related code.
require( dirname( __FILE__ ) . '/inc/theme-options.php' );
// Grab Twenty Eleven's Ephemera widget.
require( dirname( __FILE__ ) . '/inc/widgets.php' );
// Add default posts and comments RSS feed links to <head>.
add_theme_support( 'automatic-feed-links' );
// This theme uses wp_nav_menu() in one location.
register_nav_menu( 'primary', __( 'Primary Menu', 'twentyeleven' ) );
// Add support for a variety of post formats
add_theme_support( 'post-formats', array( 'aside', 'link', 'gallery', 'status', 'quote', 'image' ) );
// Add support for custom backgrounds
add_custom_background();
// This theme uses Featured Images (also known as post thumbnails) for per-post/per-page Custom Header images
add_theme_support( 'post-thumbnails' );
// The next four constants set how Twenty Eleven supports custom headers.
// The default header text color
define( 'HEADER_TEXTCOLOR', '000' );
// By leaving empty, we allow for random image rotation.
define( 'HEADER_IMAGE', '' );
// The height and width of your custom header.
// Add a filter to twentyeleven_header_image_width and twentyeleven_header_image_height to change these values.
define( 'HEADER_IMAGE_WIDTH', apply_filters( 'twentyeleven_header_image_width', 1000 ) );
define( 'HEADER_IMAGE_HEIGHT', apply_filters( 'twentyeleven_header_image_height', 288 ) );
// We'll be using post thumbnails for custom header images on posts and pages.
// We want them to be the size of the header image that we just defined
// Larger images will be auto-cropped to fit, smaller ones will be ignored. See header.php.
set_post_thumbnail_size( HEADER_IMAGE_WIDTH, HEADER_IMAGE_HEIGHT, true );
// Add Twenty Eleven's custom image sizes
add_image_size( 'large-feature', HEADER_IMAGE_WIDTH, HEADER_IMAGE_HEIGHT, true ); // Used for large feature (header) images
add_image_size( 'small-feature', 500, 300 ); // Used for featured posts if a large-feature doesn't exist
// Turn on random header image rotation by default.
add_theme_support( 'custom-header', array( 'random-default' => true ) );
// Add a way for the custom header to be styled in the admin panel that controls
// custom headers. See twentyeleven_admin_header_style(), below.
add_custom_image_header( 'twentyeleven_header_style', 'twentyeleven_admin_header_style', 'twentyeleven_admin_header_image' );
// ... and thus ends the changeable header business.
// Default custom headers packaged with the theme. %s is a placeholder for the theme template directory URI.
register_default_headers( array(
'wheel' => array(
'url' => '%s/images/headers/wheel.jpg',
'thumbnail_url' => '%s/images/headers/wheel-thumbnail.jpg',
/* translators: header image description */
'description' => __( 'Wheel', 'twentyeleven' )
),
'shore' => array(
'url' => '%s/images/headers/shore.jpg',
'thumbnail_url' => '%s/images/headers/shore-thumbnail.jpg',
/* translators: header image description */
'description' => __( 'Shore', 'twentyeleven' )
),
'trolley' => array(
'url' => '%s/images/headers/trolley.jpg',
'thumbnail_url' => '%s/images/headers/trolley-thumbnail.jpg',
/* translators: header image description */
'description' => __( 'Trolley', 'twentyeleven' )
),
'pine-cone' => array(
'url' => '%s/images/headers/pine-cone.jpg',
'thumbnail_url' => '%s/images/headers/pine-cone-thumbnail.jpg',
/* translators: header image description */
'description' => __( 'Pine Cone', 'twentyeleven' )
),
'chessboard' => array(
'url' => '%s/images/headers/chessboard.jpg',
'thumbnail_url' => '%s/images/headers/chessboard-thumbnail.jpg',
/* translators: header image description */
'description' => __( 'Chessboard', 'twentyeleven' )
),
'lanterns' => array(
'url' => '%s/images/headers/lanterns.jpg',
'thumbnail_url' => '%s/images/headers/lanterns-thumbnail.jpg',
/* translators: header image description */
'description' => __( 'Lanterns', 'twentyeleven' )
),
'willow' => array(
'url' => '%s/images/headers/willow.jpg',
'thumbnail_url' => '%s/images/headers/willow-thumbnail.jpg',
/* translators: header image description */
'description' => __( 'Willow', 'twentyeleven' )
),
'hanoi' => array(
'url' => '%s/images/headers/hanoi.jpg',
'thumbnail_url' => '%s/images/headers/hanoi-thumbnail.jpg',
/* translators: header image description */
'description' => __( 'Hanoi Plant', 'twentyeleven' )
)
) );
}
endif; // twentyeleven_setup
if ( ! function_exists( 'twentyeleven_header_style' ) ) :
/**
* Styles the header image and text displayed on the blog
*
* @since Twenty Eleven 1.0
*/
function twentyeleven_header_style() {
// If no custom options for text are set, let's bail
// get_header_textcolor() options: HEADER_TEXTCOLOR is default, hide text (returns 'blank') or any hex value
if ( HEADER_TEXTCOLOR == get_header_textcolor() )
return;
// If we get this far, we have custom styles. Let's do this.
?>
<style type="text/css">
<?php
// Has the text been hidden?
if ( 'blank' == get_header_textcolor() ) :
?>
#site-title,
#site-description {
position: absolute !important;
clip: rect(1px 1px 1px 1px); /* IE6, IE7 */
clip: rect(1px, 1px, 1px, 1px);
}
<?php
// If the user has set a custom color for the text use that
else :
?>
#site-title a,
#site-description {
color: #<?php echo get_header_textcolor(); ?> !important;
}
<?php endif; ?>
</style>
<?php
}
endif; // twentyeleven_header_style
if ( ! function_exists( 'twentyeleven_admin_header_style' ) ) :
/**
* Styles the header image displayed on the Appearance > Header admin panel.
*
* Referenced via add_custom_image_header() in twentyeleven_setup().
*
* @since Twenty Eleven 1.0
*/
function twentyeleven_admin_header_style() {
?>
<style type="text/css">
.appearance_page_custom-header #headimg {
border: none;
}
#headimg h1,
#desc {
font-family: "Helvetica Neue", Arial, Helvetica, "Nimbus Sans L", sans-serif;
}
#headimg h1 {
margin: 0;
}
#headimg h1 a {
font-size: 32px;
line-height: 36px;
text-decoration: none;
}
#desc {
font-size: 14px;
line-height: 23px;
padding: 0 0 3em;
}
<?php
// If the user has set a custom color for the text use that
if ( get_header_textcolor() != HEADER_TEXTCOLOR ) :
?>
#site-title a,
#site-description {
color: #<?php echo get_header_textcolor(); ?>;
}
<?php endif; ?>
#headimg img {
max-width: 1000px;
height: auto;
width: 100%;
}
</style>
<?php
}
endif; // twentyeleven_admin_header_style
if ( ! function_exists( 'twentyeleven_admin_header_image' ) ) :
/**
* Custom header image markup displayed on the Appearance > Header admin panel.
*
* Referenced via add_custom_image_header() in twentyeleven_setup().
*
* @since Twenty Eleven 1.0
*/
function twentyeleven_admin_header_image() { ?>
<div id="headimg">
<?php
if ( 'blank' == get_theme_mod( 'header_textcolor', HEADER_TEXTCOLOR ) || '' == get_theme_mod( 'header_textcolor', HEADER_TEXTCOLOR ) )
$style = ' style="display:none;"';
else
$style = ' style="color:#' . get_theme_mod( 'header_textcolor', HEADER_TEXTCOLOR ) . ';"';
?>
<h1><a id="name"<?php echo $style; ?> onclick="return false;" href="<?php echo esc_url( home_url( '/' ) ); ?>"><?php bloginfo( 'name' ); ?></a></h1>
<div id="desc"<?php echo $style; ?>><?php bloginfo( 'description' ); ?></div>
<?php $header_image = get_header_image();
if ( ! empty( $header_image ) ) : ?>
<img src="<?php echo esc_url( $header_image ); ?>" alt="" />
<?php endif; ?>
</div>
<?php }
endif; // twentyeleven_admin_header_image
/**
* Sets the post excerpt length to 40 words.
*
* To override this length in a child theme, remove the filter and add your own
* function tied to the excerpt_length filter hook.
*/
function twentyeleven_excerpt_length( $length ) {
return 40;
}
add_filter( 'excerpt_length', 'twentyeleven_excerpt_length' );
/**
* Returns a "Continue Reading" link for excerpts
*/
function twentyeleven_continue_reading_link() {
return ' <a href="'. esc_url( get_permalink() ) . '">' . __( 'Continue reading <span class="meta-nav">→</span>', 'twentyeleven' ) . '</a>';
}
/**
* Replaces "[...]" (appended to automatically generated excerpts) with an ellipsis and twentyeleven_continue_reading_link().
*
* To override this in a child theme, remove the filter and add your own
* function tied to the excerpt_more filter hook.
*/
function twentyeleven_auto_excerpt_more( $more ) {
return ' …' . twentyeleven_continue_reading_link();
}
add_filter( 'excerpt_more', 'twentyeleven_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.
*/
function twentyeleven_custom_excerpt_more( $output ) {
if ( has_excerpt() && ! is_attachment() ) {
$output .= twentyeleven_continue_reading_link();
}
return $output;
}
add_filter( 'get_the_excerpt', 'twentyeleven_custom_excerpt_more' );
/**
* Get our wp_nav_menu() fallback, wp_page_menu(), to show a home link.
*/
function twentyeleven_page_menu_args( $args ) {
$args['show_home'] = true;
return $args;
}
add_filter( 'wp_page_menu_args', 'twentyeleven_page_menu_args' );
/**
* Register our sidebars and widgetized areas. Also register the default Epherma widget.
*
* @since Twenty Eleven 1.0
*/
function twentyeleven_widgets_init() {
register_widget( 'Twenty_Eleven_Ephemera_Widget' );
register_sidebar( array(
'name' => __( 'Main Sidebar', 'twentyeleven' ),
'id' => 'sidebar-1',
'before_widget' => '<aside id="%1$s" class="widget %2$s">',
'after_widget' => "</aside>",
'before_title' => '<h3 class="widget-title">',
'after_title' => '</h3>',
) );
register_sidebar( array(
'name' => __( 'Showcase Sidebar', 'twentyeleven' ),
'id' => 'sidebar-2',
'description' => __( 'The sidebar for the optional Showcase Template', 'twentyeleven' ),
'before_widget' => '<aside id="%1$s" class="widget %2$s">',
'after_widget' => "</aside>",
'before_title' => '<h3 class="widget-title">',
'after_title' => '</h3>',
) );
register_sidebar( array(
'name' => __( 'Footer Area One', 'twentyeleven' ),
'id' => 'sidebar-3',
'description' => __( 'An optional widget area for your site footer', 'twentyeleven' ),
'before_widget' => '<aside id="%1$s" class="widget %2$s">',
'after_widget' => "</aside>",
'before_title' => '<h3 class="widget-title">',
'after_title' => '</h3>',
) );
register_sidebar( array(
'name' => __( 'Footer Area Two', 'twentyeleven' ),
'id' => 'sidebar-4',
'description' => __( 'An optional widget area for your site footer', 'twentyeleven' ),
'before_widget' => '<aside id="%1$s" class="widget %2$s">',
'after_widget' => "</aside>",
'before_title' => '<h3 class="widget-title">',
'after_title' => '</h3>',
) );
register_sidebar( array(
'name' => __( 'Footer Area Three', 'twentyeleven' ),
'id' => 'sidebar-5',
'description' => __( 'An optional widget area for your site footer', 'twentyeleven' ),
'before_widget' => '<aside id="%1$s" class="widget %2$s">',
'after_widget' => "</aside>",
'before_title' => '<h3 class="widget-title">',
'after_title' => '</h3>',
) );
}
add_action( 'widgets_init', 'twentyeleven_widgets_init' );
/**
* Display navigation to next/previous pages when applicable
*/
function twentyeleven_content_nav( $nav_id ) {
global $wp_query;
if ( $wp_query->max_num_pages > 1 ) : ?>
<nav id="<?php echo $nav_id; ?>">
<h3 class="assistive-text"><?php _e( 'Post navigation', 'twentyeleven' ); ?></h3>
<div class="nav-previous"><?php next_posts_link( __( '<span class="meta-nav">←</span> Older posts', 'twentyeleven' ) ); ?></div>
<div class="nav-next"><?php previous_posts_link( __( 'Newer posts <span class="meta-nav">→</span>', 'twentyeleven' ) ); ?></div>
</nav><!-- #nav-above -->
<?php endif;
}
/**
* Return the URL for the first link found in the post content.
*
* @since Twenty Eleven 1.0
* @return string|bool URL or false when no link is present.
*/
function twentyeleven_url_grabber() {
if ( ! preg_match( '/<a\s[^>]*?href=[\'"](.+?)[\'"]/is', get_the_content(), $matches ) )
return false;
return esc_url_raw( $matches[1] );
}
/**
* Count the number of footer sidebars to enable dynamic classes for the footer
*/
function twentyeleven_footer_sidebar_class() {
$count = 0;
if ( is_active_sidebar( 'sidebar-3' ) )
$count++;
if ( is_active_sidebar( 'sidebar-4' ) )
$count++;
if ( is_active_sidebar( 'sidebar-5' ) )
$count++;
$class = '';
switch ( $count ) {
case '1':
$class = 'one';
break;
case '2':
$class = 'two';
break;
case '3':
$class = 'three';
break;
}
if ( $class )
echo 'class="' . $class . '"';
}
if ( ! function_exists( 'twentyeleven_comment' ) ) :
/**
* Template for comments and pingbacks.
*
* To override this walker in a child theme without modifying the comments template
* simply create your own twentyeleven_comment(), and that function will be used instead.
*
* Used as a callback by wp_list_comments() for displaying the comments.
*
* @since Twenty Eleven 1.0
*/
function twentyeleven_comment( $comment, $args, $depth ) {
$GLOBALS['comment'] = $comment;
switch ( $comment->comment_type ) :
case 'pingback' :
case 'trackback' :
?>
<li class="post pingback">
<p><?php _e( 'Pingback:', 'twentyeleven' ); ?> <?php comment_author_link(); ?><?php edit_comment_link( __( 'Edit', 'twentyeleven' ), '<span class="edit-link">', '</span>' ); ?></p>
<?php
break;
default :
?>
<li <?php comment_class(); ?> id="li-comment-<?php comment_ID(); ?>">
<article id="comment-<?php comment_ID(); ?>" class="comment">
<footer class="comment-meta">
<div class="comment-author vcard">
<?php
$avatar_size = 68;
if ( '0' != $comment->comment_parent )
$avatar_size = 39;
echo get_avatar( $comment, $avatar_size );
/* translators: 1: comment author, 2: date and time */
printf( __( '%1$s on %2$s <span class="says">said:</span>', 'twentyeleven' ),
sprintf( '<span class="fn">%s</span>', get_comment_author_link() ),
sprintf( '<a href="%1$s"><time pubdate datetime="%2$s">%3$s</time></a>',
esc_url( get_comment_link( $comment->comment_ID ) ),
get_comment_time( 'c' ),
/* translators: 1: date, 2: time */
sprintf( __( '%1$s at %2$s', 'twentyeleven' ), get_comment_date(), get_comment_time() )
)
);
?>
<?php edit_comment_link( __( 'Edit', 'twentyeleven' ), '<span class="edit-link">', '</span>' ); ?>
</div><!-- .comment-author .vcard -->
<?php if ( $comment->comment_approved == '0' ) : ?>
<em class="comment-awaiting-moderation"><?php _e( 'Your comment is awaiting moderation.', 'twentyeleven' ); ?></em>
<br />
<?php endif; ?>
</footer>
<div class="comment-content"><?php comment_text(); ?></div>
<div class="reply">
<?php comment_reply_link( array_merge( $args, array( 'reply_text' => __( 'Reply <span>↓</span>', 'twentyeleven' ), 'depth' => $depth, 'max_depth' => $args['max_depth'] ) ) ); ?>
</div><!-- .reply -->
</article><!-- #comment-## -->
<?php
break;
endswitch;
}
endif; // ends check for twentyeleven_comment()
if ( ! function_exists( 'twentyeleven_posted_on' ) ) :
/**
* Prints HTML with meta information for the current post-date/time and author.
* Create your own twentyeleven_posted_on to override in a child theme
*
* @since Twenty Eleven 1.0
*/
function twentyeleven_posted_on() {
printf( __( '<span class="sep">Posted on </span><a href="%1$s" title="%2$s" rel="bookmark"><time class="entry-date" datetime="%3$s" pubdate>%4$s</time></a><span class="by-author"> <span class="sep"> by </span> <span class="author vcard"><a class="url fn n" href="%5$s" title="%6$s" rel="author">%7$s</a></span></span>', 'twentyeleven' ),
esc_url( get_permalink() ),
esc_attr( get_the_time() ),
esc_attr( get_the_date( 'c' ) ),
esc_html( get_the_date() ),
esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
sprintf( esc_attr__( 'View all posts by %s', 'twentyeleven' ), get_the_author() ),
esc_html( get_the_author() )
);
}
endif;
/**
* Adds two classes to the array of body classes.
* The first is if the site has only had one author with published posts.
* The second is if a singular post being displayed
*
* @since Twenty Eleven 1.0
*/
function twentyeleven_body_classes( $classes ) {
if ( ! is_multi_author() ) {
$classes[] = 'single-author';
}
if ( is_singular() && ! is_home() && ! is_page_template( 'showcase.php' ) && ! is_page_template( 'sidebar-page.php' ) )
$classes[] = 'singular';
return $classes;
}
add_filter( 'body_class', 'twentyeleven_body_classes' );