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15dc5a3718
fixes #23927 git-svn-id: http://core.svn.wordpress.org/trunk@23899 1a063a9b-81f0-0310-95a4-ce76da25c4cd
604 lines
19 KiB
PHP
604 lines
19 KiB
PHP
<?php
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/**
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* Twenty Thirteen functions and definitions.
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*
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* Sets 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 (see http://codex.wordpress.org/Theme_Development
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* and http://codex.wordpress.org/Child_Themes), you can override certain
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* functions (those wrapped in a function_exists() call) by defining them first
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* in your child theme's functions.php file. The child theme's functions.php
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* file is included before the parent theme's file, so the child theme
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* functions would be used.
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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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* see http://codex.wordpress.org/Plugin_API
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*
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* @package WordPress
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* @subpackage Twenty_Thirteen
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* @since Twenty Thirteen 1.0
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*/
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/**
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* Sets up the content width value based on the theme's design.
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* @see twentythirteen_content_width() for template-specific adjustments.
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*/
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if ( ! isset( $content_width ) )
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$content_width = 604;
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/**
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* Sets up theme defaults and registers the various WordPress features that
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* Twenty Thirteen supports.
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*
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* @uses load_theme_textdomain() For translation/localization support.
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* @uses add_editor_style() To add a Visual Editor stylesheet.
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* @uses add_theme_support() To add support for automatic feed links, post
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* formats, admin bar, and post thumbnails.
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* @uses register_nav_menu() To add support for a navigation menu.
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* @uses set_post_thumbnail_size() To set a custom post thumbnail size.
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*
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* @since Twenty Thirteen 1.0
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*
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* @return void
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*/
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function twentythirteen_setup() {
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/*
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* Makes Twenty Thirteen available for translation.
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*
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* Translations can be added to the /languages/ directory.
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* If you're building a theme based on Twenty Thirteen, use a find and
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* replace to change 'twentythirteen' to the name of your theme in all
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* template files.
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*/
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load_theme_textdomain( 'twentythirteen', get_template_directory() . '/languages' );
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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, and column width.
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*/
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add_editor_style( 'css/editor-style.css' );
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// Adds RSS feed links to <head> for posts and comments.
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add_theme_support( 'automatic-feed-links' );
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/*
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* This theme supports all available post formats.
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* See http://codex.wordpress.org/Post_Formats
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*
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* Structured post formats are formats where Twenty Thirteen handles the
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* output instead of the default core HTML output.
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*/
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add_theme_support( 'structured-post-formats', array(
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'link', 'video'
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) );
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add_theme_support( 'post-formats', array(
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'aside', 'audio', 'chat', 'gallery', 'image', 'quote', 'status'
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) );
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/*
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* Custom callback to make it easier for our fixed navbar to coexist with
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* the WordPress toolbar. See `.wp-toolbar` in style.css.
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*
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* @see WP_Admin_Bar::initialize()
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*/
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add_theme_support( 'admin-bar', array(
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'callback' => '__return_false'
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) );
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// This theme uses wp_nav_menu() in one location.
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register_nav_menu( 'primary', __( 'Navigation Menu', 'twentythirteen' ) );
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/*
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* This theme uses a custom image size for featured images, displayed on
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* "standard" posts and pages.
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*/
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add_theme_support( 'post-thumbnails' );
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set_post_thumbnail_size( 604, 270, true );
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// Register custom image size for image post formats.
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add_image_size( 'twentythirteen-image-post', 724, 1288 );
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// This theme uses its own gallery styles.
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add_filter( 'use_default_gallery_style', '__return_false' );
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}
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add_action( 'after_setup_theme', 'twentythirteen_setup' );
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/**
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* Returns the Google font stylesheet URL, if available.
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*
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* The use of Source Sans Pro and Bitter by default is localized. For languages
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* that use characters not supported by the font, the font can be disabled.
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*
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* @since Twenty Thirteen 1.0
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*
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* @return string Font stylesheet or empty string if disabled.
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*/
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function twentythirteen_fonts_url() {
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$fonts_url = '';
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/* Translators: If there are characters in your language that are not
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* supported by Source Sans Pro, translate this to 'off'. Do not translate
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* into your own language.
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*/
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$source_sans_pro = _x( 'on', 'Source Sans Pro font: on or off', 'twentythirteen' );
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/* Translators: If there are characters in your language that are not
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* supported by Bitter, translate this to 'off'. Do not translate into your
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* own language.
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*/
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$bitter = _x( 'on', 'Bitter font: on or off', 'twentythirteen' );
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if ( 'off' !== $source_sans_pro || 'off' !== $bitter ) {
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$font_families = array();
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if ( 'off' !== $source_sans_pro )
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$font_families[] = 'Source+Sans+Pro:400,700,300italic,400italic,700italic';
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if ( 'off' !== $bitter )
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$font_families[] = 'Bitter:400,700';
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$protocol = is_ssl() ? 'https' : 'http';
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$query_args = array(
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'family' => implode( '|', $font_families ),
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'subset' => 'latin,latin-ext',
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);
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$fonts_url = add_query_arg( $query_args, "$protocol://fonts.googleapis.com/css" );
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}
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return $fonts_url;
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}
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/**
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* Loads our special font CSS file.
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*
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* To disable in a child theme, use wp_dequeue_style()
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* function mytheme_dequeue_fonts() {
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* wp_dequeue_style( 'twentythirteen-fonts' );
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* }
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* add_action( 'wp_enqueue_scripts', 'mytheme_dequeue_fonts', 11 );
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*
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* Also used in the Appearance > Header admin panel:
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* @see twentythirteen_custom_header_setup()
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*
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* @since Twenty Thirteen 1.0
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*
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* @return void
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*/
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function twentythirteen_fonts() {
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$fonts_url = twentythirteen_fonts_url();
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if ( ! empty( $fonts_url ) )
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wp_enqueue_style( 'twentythirteen-fonts', esc_url_raw( $fonts_url ), array(), null );
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}
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add_action( 'wp_enqueue_scripts', 'twentythirteen_fonts' );
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/**
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* Adds additional stylesheets to the TinyMCE editor if needed.
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*
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* @uses twentythirteen_fonts_url() to get the Google Font stylesheet URL.
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*
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* @since Twenty Thirteen 1.0
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*
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* @param string $mce_css CSS path to load in TinyMCE.
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* @return string
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*/
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function twentythirteen_mce_css( $mce_css ) {
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$fonts_url = twentythirteen_fonts_url();
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if ( empty( $fonts_url ) )
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return $mce_css;
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if ( ! empty( $mce_css ) )
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$mce_css .= ',';
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$mce_css .= esc_url_raw( str_replace( ',', '%2C', $fonts_url ) );
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return $mce_css;
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}
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add_filter( 'mce_css', 'twentythirteen_mce_css' );
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/**
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* Enqueues scripts and styles for front end.
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*
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* @since Twenty Thirteen 1.0
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*
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* @return void
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*/
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function twentythirteen_scripts_styles() {
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global $wp_styles;
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/*
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* Adds JavaScript to pages with the comment form to support sites with
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* threaded comments (when in use).
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*/
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if ( is_singular() && comments_open() && get_option( 'thread_comments' ) )
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wp_enqueue_script( 'comment-reply' );
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// Adds Masonry to handle vertical alignment of footer widgets.
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if ( is_active_sidebar( 'sidebar-1' ) )
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wp_enqueue_script( 'jquery-masonry' );
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// Loads JavaScript file with functionality specific to Twenty Thirteen.
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wp_enqueue_script( 'twentythirteen-script', get_template_directory_uri() . '/js/functions.js', array( 'jquery' ), '20130211', true );
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// Loads our main stylesheet.
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wp_enqueue_style( 'twentythirteen-style', get_stylesheet_uri() );
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// Loads the Internet Explorer specific stylesheet.
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wp_enqueue_style( 'twentythirteen-ie', get_template_directory_uri() . '/css/ie.css', array( 'twentythirteen-style' ), '20130213' );
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$wp_styles->add_data( 'twentythirteen-ie', 'conditional', 'lt IE 9' );
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}
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add_action( 'wp_enqueue_scripts', 'twentythirteen_scripts_styles' );
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/**
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* Creates a nicely formatted and more specific title element text for output
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* in head of document, based on current view.
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*
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* @since Twenty Thirteen 1.0
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*
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* @param string $title Default title text for current view.
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* @param string $sep Optional separator.
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* @return string Filtered title.
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*/
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function twentythirteen_wp_title( $title, $sep ) {
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global $paged, $page;
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if ( is_feed() )
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return $title;
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// Add the site name.
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$title .= get_bloginfo( 'name' );
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// Add the site description for the home/front page.
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$site_description = get_bloginfo( 'description', 'display' );
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if ( $site_description && ( is_home() || is_front_page() ) )
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$title = "$title $sep $site_description";
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// Add a page number if necessary.
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if ( $paged >= 2 || $page >= 2 )
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$title = "$title $sep " . sprintf( __( 'Page %s', 'twentythirteen' ), max( $paged, $page ) );
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return $title;
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}
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add_filter( 'wp_title', 'twentythirteen_wp_title', 10, 2 );
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/**
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* Registers two widget areas.
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*
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* @since Twenty Thirteen 1.0
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*
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* @return void
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*/
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function twentythirteen_widgets_init() {
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register_sidebar( array(
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'name' => __( 'Main Widget Area', 'twentythirteen' ),
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'id' => 'sidebar-1',
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'description' => __( 'Appears in the footer section of the site', 'twentythirteen' ),
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'before_widget' => '<aside id="%1$s" class="widget %2$s">',
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'after_widget' => '</aside>',
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'before_title' => '<h3 class="widget-title">',
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'after_title' => '</h3>',
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) );
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register_sidebar( array(
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'name' => __( 'Secondary Widget Area', 'twentythirteen' ),
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'id' => 'sidebar-2',
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'description' => __( 'Appears on posts and pages in the sidebar.', 'twentythirteen' ),
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'before_widget' => '<aside id="%1$s" class="widget %2$s">',
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'after_widget' => '</aside>',
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'before_title' => '<h3 class="widget-title">',
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'after_title' => '</h3>',
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) );
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}
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add_action( 'widgets_init', 'twentythirteen_widgets_init' );
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if ( ! function_exists( 'twentythirteen_paging_nav' ) ) :
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/**
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* Displays navigation to next/previous set of posts when applicable.
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*
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* @since Twenty Thirteen 1.0
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*
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* @return void
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*/
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function twentythirteen_paging_nav() {
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global $wp_query;
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// Don't print empty markup if there's only one page.
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if ( $wp_query->max_num_pages < 2 && ( is_home() || is_archive() || is_search() ) )
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return;
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?>
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<nav class="navigation paging-navigation" role="navigation">
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<h1 class="screen-reader-text"><?php _e( 'Posts navigation', 'twentythirteen' ); ?></h1>
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<div class="nav-links">
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<?php if ( get_next_posts_link() ) : ?>
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<div class="nav-previous"><?php next_posts_link( __( '<span class="meta-nav">←</span> Older posts', 'twentythirteen' ) ); ?></div>
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<?php endif; ?>
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<?php if ( get_previous_posts_link() ) : ?>
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<div class="nav-next"><?php previous_posts_link( __( 'Newer posts <span class="meta-nav">→</span>', 'twentythirteen' ) ); ?></div>
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<?php endif; ?>
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</div><!-- .nav-links -->
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</nav><!-- .navigation -->
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<?php
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}
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endif;
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if ( ! function_exists( 'twentythirteen_post_nav' ) ) :
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/**
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* Displays navigation to next/previous post when applicable.
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*
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* @since Twenty Thirteen 1.0
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*
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* @return void
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*/
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function twentythirteen_post_nav() {
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global $post;
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// Don't print empty markup if there's nowhere to navigate.
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$previous = ( is_attachment() ) ? get_post( $post->post_parent ) : get_adjacent_post( false, '', true );
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$next = get_adjacent_post( false, '', false );
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if ( ! $next && ! $previous )
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return;
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?>
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<nav class="navigation post-navigation" role="navigation">
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<h1 class="screen-reader-text"><?php _e( 'Post navigation', 'twentythirteen' ); ?></h1>
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<div class="nav-links">
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<?php previous_post_link( '%link', _x( '<span class="meta-nav">←</span> %title', 'Previous post link', 'twentythirteen' ) ); ?>
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<?php next_post_link( '%link', _x( '%title <span class="meta-nav">→</span>', 'Next post link', 'twentythirteen' ) ); ?>
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</div><!-- .nav-links -->
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</nav><!-- .navigation -->
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<?php
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}
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endif;
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if ( ! function_exists( 'twentythirteen_entry_meta' ) ) :
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/**
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* Prints HTML with meta information for current post: categories, tags, permalink, author, and date.
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*
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* Create your own twentythirteen_entry_meta() to override in a child theme.
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*
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* @since Twenty Thirteen 1.0
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*
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* @return void
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*/
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function twentythirteen_entry_meta() {
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if ( is_sticky() && is_home() && ! is_paged() )
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echo '<span class="featured-post">' . __( 'Sticky', 'twentythirteen' ) . '</span>';
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if ( ! has_post_format( 'aside' ) && ! has_post_format( 'link' ) && 'post' == get_post_type() )
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twentythirteen_entry_date();
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// Translators: used between list items, there is a space after the comma.
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$categories_list = get_the_category_list( __( ', ', 'twentythirteen' ) );
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if ( $categories_list ) {
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echo '<span class="categories-links">' . $categories_list . '</span>';
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}
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// Translators: used between list items, there is a space after the comma.
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$tag_list = get_the_tag_list( '', __( ', ', 'twentythirteen' ) );
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if ( $tag_list ) {
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echo '<span class="tags-links">' . $tag_list . '</span>';
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}
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// Post author
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if ( 'post' == get_post_type() ) {
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printf( '<span class="author vcard"><a class="url fn n" href="%1$s" title="%2$s" rel="author">%3$s</a></span>',
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esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
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esc_attr( sprintf( __( 'View all posts by %s', 'twentythirteen' ), get_the_author() ) ),
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get_the_author()
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);
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}
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}
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endif;
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if ( ! function_exists( 'twentythirteen_entry_date' ) ) :
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/**
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* Prints HTML with date information for current post.
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*
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* Create your own twentythirteen_entry_date() to override in a child theme.
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*
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* @since Twenty Thirteen 1.0
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*
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* @param boolean $echo Whether to echo the date. Default true.
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* @return string
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*/
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function twentythirteen_entry_date( $echo = true ) {
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$format_prefix = ( has_post_format( 'chat' ) || has_post_format( 'status' ) ) ? _x( '%1$s on %2$s', '1: post format name. 2: date', 'twentythirteen' ): '%2$s';
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$date = sprintf( '<span class="date"><a href="%1$s" title="%2$s" rel="bookmark"><time class="entry-date" datetime="%3$s">%4$s</time></a></span>',
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esc_url( get_permalink() ),
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esc_attr( sprintf( __( 'Permalink to %s', 'twentythirteen' ), the_title_attribute( 'echo=0' ) ) ),
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esc_attr( get_the_date( 'c' ) ),
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esc_html( sprintf( $format_prefix, get_post_format_string( get_post_format() ), get_the_date() ) )
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);
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if ( $echo )
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echo $date;
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return $date;
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}
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endif;
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/**
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* Returns the URL from the post.
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*
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* @uses get_the_link() to get the URL in the post meta (if it exists) or
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* the first link found in the post content.
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*
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* Falls back to the post permalink if no URL is found in the post.
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*
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* @since Twenty Thirteen 1.0
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* @return string URL
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*/
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function twentythirteen_get_link_url() {
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$has_url = get_the_post_format_url();
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return ( $has_url ) ? $has_url : apply_filters( 'the_permalink', get_permalink() );
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}
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if ( ! function_exists( 'twentythirteen_featured_gallery' ) ) :
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/**
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* Displays first gallery from post content. Changes image size from thumbnail
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* to large, to display a larger first image.
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*
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* @since Twenty Thirteen 1.0
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*
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* @return void
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*/
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function twentythirteen_featured_gallery() {
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$pattern = get_shortcode_regex();
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if ( preg_match( "/$pattern/s", get_the_content(), $match ) && 'gallery' == $match[2] ) {
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add_filter( 'shortcode_atts_gallery', 'twentythirteen_gallery_atts' );
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echo do_shortcode_tag( $match );
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}
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}
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endif;
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/**
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* Sets the image size in featured galleries to large.
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*
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* @see twentythirteen_featured_gallery()
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*
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* @since Twenty Thirteen 1.0
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*
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* @param array $atts Combined and filtered attribute list.
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* @return array
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*/
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function twentythirteen_gallery_atts( $atts ) {
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$atts['size'] = 'large';
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return $atts;
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}
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/**
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* Extends the default WordPress body class to denote:
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* 1. Custom fonts enabled.
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* 2. Single or multiple authors.
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* 3. Active widgets in the sidebar to change the layout and spacing.
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*
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* @since Twenty Thirteen 1.0
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*
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* @param array $classes Existing class values.
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* @return array Filtered class values.
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*/
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function twentythirteen_body_class( $classes ) {
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// Enable custom font class only if the font CSS is queued to load.
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if ( wp_style_is( 'twentythirteen-fonts', 'queue' ) )
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$classes[] = 'custom-font';
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if ( ! is_multi_author() )
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$classes[] = 'single-author';
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if ( is_active_sidebar( 'sidebar-2' ) && ! is_attachment() && ! is_404() )
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$classes[] = 'sidebar';
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return $classes;
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}
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add_filter( 'body_class', 'twentythirteen_body_class' );
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/**
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* Extends the default WordPress comment class to add 'no-avatars' class
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* if avatars are disabled in discussion settings.
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*
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* @since Twenty Thirteen 1.0
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*
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* @param array $classes Existing class values.
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* @return array Filtered class values.
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*/
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function twentythirteen_comment_class( $classes ) {
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if ( ! get_option ( 'show_avatars' ) )
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$classes[] = 'no-avatars';
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return $classes;
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}
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add_filter( 'comment_class', 'twentythirteen_comment_class' );
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/**
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* Adjusts content_width value for image post formats, video post formats, and
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* image attachment templates.
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*
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* @since Twenty Thirteen 1.0
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*/
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function twentythirteen_content_width() {
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if ( has_post_format( 'video' ) || is_attachment() ) {
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global $content_width;
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$content_width = 724;
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}
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}
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add_action( 'template_redirect', 'twentythirteen_content_width' );
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/**
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* Adds entry date to aside posts after the content.
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*
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*
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* @since Twenty Thirteen 1.0
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*
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* @param string $content Post content.
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* @return string Post content.
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*/
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function twentythirteen_aside_date( $content ) {
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if ( ! is_feed() && has_post_format( 'aside' ) ) {
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$content .= twentythirteen_entry_date( false );
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}
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return $content;
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}
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add_filter( 'the_content', 'twentythirteen_aside_date', 8 ); // After embeds, before everything else.
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/**
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* Switches default core markup for search form to output valid HTML5.
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*
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* @param string $format Expected markup format, default is `xhtml`
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* @return string Twenty Thirteen loves HTML5.
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*/
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function twentythirteen_searchform_format( $format ) {
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return 'html5';
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}
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add_filter( 'search_form_format', 'twentythirteen_searchform_format' );
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/**
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* Add postMessage support for site title and description for the Customizer.
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*
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* @since Twenty Thirteen 1.0
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*
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* @param WP_Customize_Manager $wp_customize Customizer object.
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* @return void
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*/
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function twentythirteen_customize_register( $wp_customize ) {
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$wp_customize->get_setting( 'blogname' )->transport = 'postMessage';
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$wp_customize->get_setting( 'blogdescription' )->transport = 'postMessage';
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$wp_customize->get_setting( 'header_textcolor' )->transport = 'postMessage';
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}
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add_action( 'customize_register', 'twentythirteen_customize_register' );
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/**
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* Binds JavaScript handlers to make Customizer preview reload changes
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* asynchronously.
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*
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* @since Twenty Thirteen 1.0
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*/
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function twentythirteen_customize_preview_js() {
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wp_enqueue_script( 'twentythirteen-customizer', get_template_directory_uri() . '/js/theme-customizer.js', array( 'customize-preview' ), '20130226', true );
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}
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add_action( 'customize_preview_init', 'twentythirteen_customize_preview_js' );
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/**
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* Adds support for a custom header image.
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*/
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require( get_template_directory() . '/inc/custom-header.php' );
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/**
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* Adds back compat handling for WP versions pre-3.6.
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*/
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if ( version_compare( $GLOBALS['wp_version'], '3.6-alpha', '<' ) )
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require( get_template_directory() . '/inc/back-compat.php' );
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