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  1. <?php
  2. /**
  3. * Twenty Thirteen functions and definitions
  4. *
  5. * Sets up the theme and provides some helper functions, which are used in the
  6. * theme as custom template tags. Others are attached to action and filter
  7. * hooks in WordPress to change core functionality.
  8. *
  9. * When using a child theme (see http://codex.wordpress.org/Theme_Development
  10. * and http://codex.wordpress.org/Child_Themes), you can override certain
  11. * functions (those wrapped in a function_exists() call) by defining them first
  12. * in your child theme's functions.php file. The child theme's functions.php
  13. * file is included before the parent theme's file, so the child theme
  14. * functions would be used.
  15. *
  16. * Functions that are not pluggable (not wrapped in function_exists()) are
  17. * instead attached to a filter or action hook.
  18. *
  19. * For more information on hooks, actions, and filters, @link http://codex.wordpress.org/Plugin_API
  20. *
  21. * @package WordPress
  22. * @subpackage Twenty_Thirteen
  23. * @since Twenty Thirteen 1.0
  24. */
  25.  
  26. /*
  27. * Set up the content width value based on the theme's design.
  28. *
  29. * @see twentythirteen_content_width() for template-specific adjustments.
  30. */
  31. if ( ! isset( $content_width ) )
  32. $content_width = 604;
  33.  
  34. /**
  35. * Add support for a custom header image.
  36. */
  37. require get_template_directory() . '/inc/custom-header.php';
  38.  
  39. /**
  40. * Twenty Thirteen only works in WordPress 3.6 or later.
  41. */
  42. if ( version_compare( $GLOBALS['wp_version'], '3.6-alpha', '<' ) )
  43. require get_template_directory() . '/inc/back-compat.php';
  44.  
  45. /**
  46. * Twenty Thirteen setup.
  47. *
  48. * Sets up theme defaults and registers the various WordPress features that
  49. * Twenty Thirteen supports.
  50. *
  51. * @uses load_theme_textdomain() For translation/localization support.
  52. * @uses add_editor_style() To add Visual Editor stylesheets.
  53. * @uses add_theme_support() To add support for automatic feed links, post
  54. * formats, and post thumbnails.
  55. * @uses register_nav_menu() To add support for a navigation menu.
  56. * @uses set_post_thumbnail_size() To set a custom post thumbnail size.
  57. *
  58. * @since Twenty Thirteen 1.0
  59. *
  60. * @return void
  61. */
  62. function twentythirteen_setup() {
  63. /*
  64. * Makes Twenty Thirteen available for translation.
  65. *
  66. * Translations can be added to the /languages/ directory.
  67. * If you're building a theme based on Twenty Thirteen, use a find and
  68. * replace to change 'twentythirteen' to the name of your theme in all
  69. * template files.
  70. */
  71. load_theme_textdomain( 'twentythirteen', get_template_directory() . '/languages' );
  72.  
  73. /*
  74. * This theme styles the visual editor to resemble the theme style,
  75. * specifically font, colors, icons, and column width.
  76. */
  77. add_editor_style( array( 'css/editor-style.css', 'fonts/genericons.css', twentythirteen_fonts_url() ) );
  78.  
  79. // Adds RSS feed links to <head> for posts and comments.
  80. add_theme_support( 'automatic-feed-links' );
  81.  
  82. /*
  83. * Switches default core markup for search form, comment form,
  84. * and comments to output valid HTML5.
  85. */
  86. add_theme_support( 'html5', array( 'search-form', 'comment-form', 'comment-list' ) );
  87.  
  88. /*
  89. * This theme supports all available post formats by default.
  90. * See http://codex.wordpress.org/Post_Formats
  91. */
  92. add_theme_support( 'post-formats', array(
  93. 'aside', 'audio', 'chat', 'gallery', 'image', 'link', 'quote', 'status', 'video'
  94. ) );
  95.  
  96. // This theme uses wp_nav_menu() in one location.
  97. register_nav_menu( 'primary', __( 'Navigation Menu', 'twentythirteen' ) );
  98.  
  99. /*
  100. * This theme uses a custom image size for featured images, displayed on
  101. * "standard" posts and pages.
  102. */
  103. add_theme_support( 'post-thumbnails' );
  104. set_post_thumbnail_size( 604, 270, true );
  105.  
  106. // This theme uses its own gallery styles.
  107. add_filter( 'use_default_gallery_style', '__return_false' );
  108. }
  109. add_action( 'after_setup_theme', 'twentythirteen_setup' );
  110.  
  111. /**
  112. * Return the Google font stylesheet URL, if available.
  113. *
  114. * The use of Source Sans Pro and Bitter by default is localized. For languages
  115. * that use characters not supported by the font, the font can be disabled.
  116. *
  117. * @since Twenty Thirteen 1.0
  118. *
  119. * @return string Font stylesheet or empty string if disabled.
  120. */
  121. function twentythirteen_fonts_url() {
  122. $fonts_url = '';
  123.  
  124. /* Translators: If there are characters in your language that are not
  125. * supported by Source Sans Pro, translate this to 'off'. Do not translate
  126. * into your own language.
  127. */
  128. $source_sans_pro = _x( 'on', 'Source Sans Pro font: on or off', 'twentythirteen' );
  129.  
  130. /* Translators: If there are characters in your language that are not
  131. * supported by Bitter, translate this to 'off'. Do not translate into your
  132. * own language.
  133. */
  134. $bitter = _x( 'on', 'Bitter font: on or off', 'twentythirteen' );
  135.  
  136. if ( 'off' !== $source_sans_pro || 'off' !== $bitter ) {
  137. $font_families = array();
  138.  
  139. if ( 'off' !== $source_sans_pro )
  140. $font_families[] = 'Source Sans Pro:300,400,700,300italic,400italic,700italic';
  141.  
  142. if ( 'off' !== $bitter )
  143. $font_families[] = 'Bitter:400,700';
  144.  
  145. $query_args = array(
  146. 'family' => urlencode( implode( '|', $font_families ) ),
  147. 'subset' => urlencode( 'latin,latin-ext' ),
  148. );
  149. $fonts_url = add_query_arg( $query_args, "//fonts.googleapis.com/css" );
  150. }
  151.  
  152. return $fonts_url;
  153. }
  154.  
  155. /**
  156. * Enqueue scripts and styles for the front end.
  157. *
  158. * @since Twenty Thirteen 1.0
  159. *
  160. * @return void
  161. */
  162. function twentythirteen_scripts_styles() {
  163. /*
  164. * Adds JavaScript to pages with the comment form to support
  165. * sites with threaded comments (when in use).
  166. */
  167. if ( is_singular() && comments_open() && get_option( 'thread_comments' ) )
  168. wp_enqueue_script( 'comment-reply' );
  169.  
  170. // Adds Masonry to handle vertical alignment of footer widgets.
  171. if ( is_active_sidebar( 'sidebar-1' ) )
  172. wp_enqueue_script( 'jquery-masonry' );
  173.  
  174. // Loads JavaScript file with functionality specific to Twenty Thirteen.
  175. wp_enqueue_script( 'twentythirteen-script', get_template_directory_uri() . '/js/functions.js', array( 'jquery' ), '2013-07-18', true );
  176.  
  177. // Add Source Sans Pro and Bitter fonts, used in the main stylesheet.
  178. wp_enqueue_style( 'twentythirteen-fonts', twentythirteen_fonts_url(), array(), null );
  179.  
  180. // Add Genericons font, used in the main stylesheet.
  181. wp_enqueue_style( 'genericons', get_template_directory_uri() . '/fonts/genericons.css', array(), '2.09' );
  182.  
  183. // Loads our main stylesheet.
  184. wp_enqueue_style( 'twentythirteen-style', get_stylesheet_uri(), array(), '2013-07-18' );
  185.  
  186. // Loads the Internet Explorer specific stylesheet.
  187. wp_enqueue_style( 'twentythirteen-ie', get_template_directory_uri() . '/css/ie.css', array( 'twentythirteen-style' ), '2013-07-18' );
  188. wp_style_add_data( 'twentythirteen-ie', 'conditional', 'lt IE 9' );
  189. }
  190. add_action( 'wp_enqueue_scripts', 'twentythirteen_scripts_styles' );
  191.  
  192. /**
  193. * Filter the page title.
  194. *
  195. * Creates a nicely formatted and more specific title element text for output
  196. * in head of document, based on current view.
  197. *
  198. * @since Twenty Thirteen 1.0
  199. *
  200. * @param string $title Default title text for current view.
  201. * @param string $sep Optional separator.
  202. * @return string The filtered title.
  203. */
  204. function twentythirteen_wp_title( $title, $sep ) {
  205. global $paged, $page;
  206.  
  207. if ( is_feed() )
  208. return $title;
  209.  
  210. // Add the site name.
  211. $title .= get_bloginfo( 'name' );
  212.  
  213. // Add the site description for the home/front page.
  214. $site_description = get_bloginfo( 'description', 'display' );
  215. if ( $site_description && ( is_home() || is_front_page() ) )
  216. $title = "$title $sep $site_description";
  217.  
  218. // Add a page number if necessary.
  219. if ( $paged >= 2 || $page >= 2 )
  220. $title = "$title $sep " . sprintf( __( 'Page %s', 'twentythirteen' ), max( $paged, $page ) );
  221.  
  222. return $title;
  223. }
  224. add_filter( 'wp_title', 'twentythirteen_wp_title', 10, 2 );
  225.  
  226. /**
  227. * Register two widget areas.
  228. *
  229. * @since Twenty Thirteen 1.0
  230. *
  231. * @return void
  232. */
  233. function twentythirteen_widgets_init() {
  234. register_sidebar( array(
  235. 'name' => __( 'Main Widget Area', 'twentythirteen' ),
  236. 'id' => 'sidebar-1',
  237. 'description' => __( 'Appears in the footer section of the site.', 'twentythirteen' ),
  238. 'before_widget' => '<aside id="%1$s" class="widget %2$s">',
  239. 'after_widget' => '</aside>',
  240. 'before_title' => '<h3 class="widget-title">',
  241. 'after_title' => '</h3>',
  242. ) );
  243.  
  244. register_sidebar( array(
  245. 'name' => __( 'Secondary Widget Area', 'twentythirteen' ),
  246. 'id' => 'sidebar-2',
  247. 'description' => __( 'Appears on posts and pages in the sidebar.', 'twentythirteen' ),
  248. 'before_widget' => '<aside id="%1$s" class="widget %2$s">',
  249. 'after_widget' => '</aside>',
  250. 'before_title' => '<h3 class="widget-title">',
  251. 'after_title' => '</h3>',
  252. ) );
  253. }
  254. add_action( 'widgets_init', 'twentythirteen_widgets_init' );
  255.  
  256. if ( ! function_exists( 'twentythirteen_paging_nav' ) ) :
  257. /**
  258. * Display navigation to next/previous set of posts when applicable.
  259. *
  260. * @since Twenty Thirteen 1.0
  261. *
  262. * @return void
  263. */
  264. function twentythirteen_paging_nav() {
  265. global $wp_query;
  266.  
  267. // Don't print empty markup if there's only one page.
  268. if ( $wp_query->max_num_pages < 2 )
  269. return;
  270. ?>
  271. <nav class="navigation paging-navigation" role="navigation">
  272. <h1 class="screen-reader-text"><?php _e( 'Posts navigation', 'twentythirteen' ); ?></h1>
  273. <div class="nav-links">
  274.  
  275. <?php if ( get_next_posts_link() ) : ?>
  276. <div class="nav-previous"><?php next_posts_link( __( '<span class="meta-nav">&larr;</span> Older posts', 'twentythirteen' ) ); ?></div>
  277. <?php endif; ?>
  278.  
  279. <?php if ( get_previous_posts_link() ) : ?>
  280. <div class="nav-next"><?php previous_posts_link( __( 'Newer posts <span class="meta-nav">&rarr;</span>', 'twentythirteen' ) ); ?></div>
  281. <?php endif; ?>
  282.  
  283. </div><!-- .nav-links -->
  284. </nav><!-- .navigation -->
  285. <?php
  286. }
  287. endif;
  288.  
  289. if ( ! function_exists( 'twentythirteen_post_nav' ) ) :
  290. /**
  291. * Display navigation to next/previous post when applicable.
  292. *
  293. * @since Twenty Thirteen 1.0
  294. *
  295. * @return void
  296. */
  297. function twentythirteen_post_nav() {
  298. global $post;
  299.  
  300. // Don't print empty markup if there's nowhere to navigate.
  301. $previous = ( is_attachment() ) ? get_post( $post->post_parent ) : get_adjacent_post( false, '', true );
  302. $next = get_adjacent_post( false, '', false );
  303.  
  304. if ( ! $next && ! $previous )
  305. return;
  306. ?>
  307. <nav class="navigation post-navigation" role="navigation">
  308. <h1 class="screen-reader-text"><?php _e( 'Post navigation', 'twentythirteen' ); ?></h1>
  309. <div class="nav-links">
  310.  
  311. <?php previous_post_link( '%link', _x( '<span class="meta-nav">&larr;</span> %title', 'Previous post link', 'twentythirteen' ) ); ?>
  312. <?php next_post_link( '%link', _x( '%title <span class="meta-nav">&rarr;</span>', 'Next post link', 'twentythirteen' ) ); ?>
  313.  
  314. </div><!-- .nav-links -->
  315. </nav><!-- .navigation -->
  316. <?php
  317. }
  318. endif;
  319.  
  320. if ( ! function_exists( 'twentythirteen_entry_meta' ) ) :
  321. /**
  322. * Print HTML with meta information for current post: categories, tags, permalink, author, and date.
  323. *
  324. * Create your own twentythirteen_entry_meta() to override in a child theme.
  325. *
  326. * @since Twenty Thirteen 1.0
  327. *
  328. * @return void
  329. */
  330. function twentythirteen_entry_meta() {
  331. if ( is_sticky() && is_home() && ! is_paged() )
  332. echo '<span class="featured-post">' . __( 'Sticky', 'twentythirteen' ) . '</span>';
  333.  
  334. if ( ! has_post_format( 'link' ) && 'post' == get_post_type() )
  335.  
  336.  
  337. // Translators: used between list items, there is a space after the comma.
  338.  
  339.  
  340. // Translators: used between list items, there is a space after the comma.
  341. $tag_list = get_the_tag_list( '', __( ', ', 'twentythirteen' ) );
  342. if ( $tag_list ) {
  343. echo '<span class="tags-links">' . $tag_list . '</span>';
  344. }
  345.  
  346. // Post author
  347. if ( 'post' == get_post_type() ) {
  348. printf( '<span class="author vcard"><a class="url fn n" href="%1$s" title="%2$s" rel="author">%3$s</a></span>',
  349. esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
  350. esc_attr( sprintf( __( 'View all posts by %s', 'twentythirteen' ), get_the_author() ) ),
  351. get_the_author()
  352. );
  353. }
  354. }
  355. endif;
  356.  
  357. if ( ! function_exists( 'twentythirteen_entry_date' ) ) :
  358. /**
  359. * Print HTML with date information for current post.
  360. *
  361. * Create your own twentythirteen_entry_date() to override in a child theme.
  362. *
  363. * @since Twenty Thirteen 1.0
  364. *
  365. * @param boolean $echo (optional) Whether to echo the date. Default true.
  366. * @return string The HTML-formatted post date.
  367. */
  368. function twentythirteen_entry_date( $echo = true ) {
  369. if ( has_post_format( array( 'chat', 'status' ) ) )
  370. $format_prefix = _x( '%1$s on %2$s', '1: post format name. 2: date', 'twentythirteen' );
  371. else
  372. $format_prefix = '%2$s';
  373.  
  374. $date = sprintf( '<span class="date"><a href="%1$s" title="%2$s" rel="bookmark"><time class="entry-date" datetime="%3$s">%4$s</time></a></span>',
  375. esc_url( get_permalink() ),
  376. esc_attr( sprintf( __( 'Permalink to %s', 'twentythirteen' ), the_title_attribute( 'echo=0' ) ) ),
  377. esc_attr( get_the_date( 'c' ) ),
  378. esc_html( sprintf( $format_prefix, get_post_format_string( get_post_format() ), get_the_date() ) )
  379. );
  380.  
  381. if ( $echo )
  382. echo $date;
  383.  
  384. return $date;
  385. }
  386. endif;
  387.  
  388. if ( ! function_exists( 'twentythirteen_the_attached_image' ) ) :
  389. /**
  390. * Print the attached image with a link to the next attached image.
  391. *
  392. * @since Twenty Thirteen 1.0
  393. *
  394. * @return void
  395. */
  396. function twentythirteen_the_attached_image() {
  397. /**
  398. * Filter the image attachment size to use.
  399. *
  400. * @since Twenty thirteen 1.0
  401. *
  402. * @param array $size {
  403. * @type int The attachment height in pixels.
  404. * @type int The attachment width in pixels.
  405. * }
  406. */
  407. $attachment_size = apply_filters( 'twentythirteen_attachment_size', array( 724, 724 ) );
  408. $next_attachment_url = wp_get_attachment_url();
  409. $post = get_post();
  410.  
  411. /*
  412. * Grab the IDs of all the image attachments in a gallery so we can get the URL
  413. * of the next adjacent image in a gallery, or the first image (if we're
  414. * looking at the last image in a gallery), or, in a gallery of one, just the
  415. * link to that image file.
  416. */
  417. $attachment_ids = get_posts( array(
  418. 'post_parent' => $post->post_parent,
  419. 'fields' => 'ids',
  420. 'numberposts' => -1,
  421. 'post_status' => 'inherit',
  422. 'post_type' => 'attachment',
  423. 'post_mime_type' => 'image',
  424. 'order' => 'ASC',
  425. 'orderby' => 'menu_order ID'
  426. ) );
  427.  
  428. // If there is more than 1 attachment in a gallery...
  429. if ( count( $attachment_ids ) > 1 ) {
  430. foreach ( $attachment_ids as $attachment_id ) {
  431. if ( $attachment_id == $post->ID ) {
  432. $next_id = current( $attachment_ids );
  433. break;
  434. }
  435. }
  436.  
  437. // get the URL of the next image attachment...
  438. if ( $next_id )
  439. $next_attachment_url = get_attachment_link( $next_id );
  440.  
  441. // or get the URL of the first image attachment.
  442. else
  443. $next_attachment_url = get_attachment_link( array_shift( $attachment_ids ) );
  444. }
  445.  
  446. printf( '<a href="%1$s" title="%2$s" rel="attachment">%3$s</a>',
  447. esc_url( $next_attachment_url ),
  448. the_title_attribute( array( 'echo' => false ) ),
  449. wp_get_attachment_image( $post->ID, $attachment_size )
  450. );
  451. }
  452. endif;
  453.  
  454. /**
  455. * Return the post URL.
  456. *
  457. * @uses get_url_in_content() to get the URL in the post meta (if it exists) or
  458. * the first link found in the post content.
  459. *
  460. * Falls back to the post permalink if no URL is found in the post.
  461. *
  462. * @since Twenty Thirteen 1.0
  463. *
  464. * @return string The Link format URL.
  465. */
  466. function twentythirteen_get_link_url() {
  467. $content = get_the_content();
  468. $has_url = get_url_in_content( $content );
  469.  
  470. return ( $has_url ) ? $has_url : apply_filters( 'the_permalink', get_permalink() );
  471. }
  472.  
  473. /**
  474. * Extend the default WordPress body classes.
  475. *
  476. * Adds body classes to denote:
  477. * 1. Single or multiple authors.
  478. * 2. Active widgets in the sidebar to change the layout and spacing.
  479. * 3. When avatars are disabled in discussion settings.
  480. *
  481. * @since Twenty Thirteen 1.0
  482. *
  483. * @param array $classes A list of existing body class values.
  484. * @return array The filtered body class list.
  485. */
  486. function twentythirteen_body_class( $classes ) {
  487. if ( ! is_multi_author() )
  488. $classes[] = 'single-author';
  489.  
  490. if ( is_active_sidebar( 'sidebar-2' ) && ! is_attachment() && ! is_404() )
  491. $classes[] = 'sidebar';
  492.  
  493. if ( ! get_option( 'show_avatars' ) )
  494. $classes[] = 'no-avatars';
  495.  
  496. return $classes;
  497. }
  498. add_filter( 'body_class', 'twentythirteen_body_class' );
  499.  
  500. /**
  501. * Adjust content_width value for video post formats and attachment templates.
  502. *
  503. * @since Twenty Thirteen 1.0
  504. *
  505. * @return void
  506. */
  507. function twentythirteen_content_width() {
  508. global $content_width;
  509.  
  510. if ( is_attachment() )
  511. $content_width = 724;
  512. elseif ( has_post_format( 'audio' ) )
  513. $content_width = 484;
  514. }
  515. add_action( 'template_redirect', 'twentythirteen_content_width' );
  516.  
  517. /**
  518. * Add postMessage support for site title and description for the Customizer.
  519. *
  520. * @since Twenty Thirteen 1.0
  521. *
  522. * @param WP_Customize_Manager $wp_customize Customizer object.
  523. * @return void
  524. */
  525. function twentythirteen_customize_register( $wp_customize ) {
  526. $wp_customize->get_setting( 'blogname' )->transport = 'postMessage';
  527. $wp_customize->get_setting( 'blogdescription' )->transport = 'postMessage';
  528. $wp_customize->get_setting( 'header_textcolor' )->transport = 'postMessage';
  529. }
  530. add_action( 'customize_register', 'twentythirteen_customize_register' );
  531.  
  532. /**
  533. * Enqueue Javascript postMessage handlers for the Customizer.
  534. *
  535. * Binds JavaScript handlers to make the Customizer preview
  536. * reload changes asynchronously.
  537. *
  538. * @since Twenty Thirteen 1.0
  539. *
  540. * @return void
  541. */
  542. function twentythirteen_customize_preview_js() {
  543. wp_enqueue_script( 'twentythirteen-customizer', get_template_directory_uri() . '/js/theme-customizer.js', array( 'customize-preview' ), '20130226', true );
  544. }
  545. add_action( 'customize_preview_init', 'twentythirteen_customize_preview_js' );
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