wp-content/themes/twentyfifteen/inc/template-tags.php

   1 <?php
   2 /**
   3  * Custom template tags for Twenty Fifteen
   4  *
   5  * Eventually, some of the functionality here could be replaced by core features.
   6  *
   7  * @package WordPress
   8  * @subpackage Twenty_Fifteen
   9  * @since Twenty Fifteen 1.0
  10  */
  11
  12 if ( ! function_exists( 'twentyfifteen_comment_nav' ) ) :
  13 /**
  14  * Display navigation to next/previous comments when applicable.
  15  *
  16  * @since Twenty Fifteen 1.0
  17  */
  18 function twentyfifteen_comment_nav() {
  19         // Are there comments to navigate through?
  20         if ( get_comment_pages_count() > 1 && get_option( 'page_comments' ) ) :
  21         ?>
  22         <nav class="navigation comment-navigation" role="navigation">
  23                 <h2 class="screen-reader-text"><?php _e( 'Comment navigation', 'twentyfifteen' ); ?></h2>
  24                 <div class="nav-links">
  25                         <?php
  26                                 if ( $prev_link = get_previous_comments_link( __( 'Older Comments', 'twentyfifteen' ) ) ) :
  27                                         printf( '<div class="nav-previous">%s</div>', $prev_link );
  28                                 endif;
  29
  30                                 if ( $next_link = get_next_comments_link( __( 'Newer Comments', 'twentyfifteen' ) ) ) :
  31                                         printf( '<div class="nav-next">%s</div>', $next_link );
  32                                 endif;
  33                         ?>
  34                 </div><!-- .nav-links -->
  35         </nav><!-- .comment-navigation -->
  36         <?php
  37         endif;
  38 }
  39 endif;
  40
  41 if ( ! function_exists( 'twentyfifteen_entry_meta' ) ) :
  42 /**
  43  * Prints HTML with meta information for the categories, tags.
  44  *
  45  * @since Twenty Fifteen 1.0
  46  */
  47 function twentyfifteen_entry_meta() {
  48         if ( is_sticky() && is_home() && ! is_paged() ) {
  49                 printf( '<span class="sticky-post">%s</span>', __( 'Featured', 'twentyfifteen' ) );
  50         }
  51
  52         $format = get_post_format();
  53         if ( current_theme_supports( 'post-formats', $format ) ) {
  54                 printf( '<span class="entry-format">%1$s<a href="%2$s">%3$s</a></span>',
  55                         sprintf( '<span class="screen-reader-text">%s </span>', _x( 'Format', 'Used before post format.', 'twentyfifteen' ) ),
  56                         esc_url( get_post_format_link( $format ) ),
  57                         get_post_format_string( $format )
  58                 );
  59         }
  60
  61         if ( in_array( get_post_type(), array( 'post', 'attachment' ) ) ) {
  62                 $time_string = '<time class="entry-date published updated" datetime="%1$s">%2$s</time>';
  63
  64                 if ( get_the_time( 'U' ) !== get_the_modified_time( 'U' ) ) {
  65                         $time_string = '<time class="entry-date published" datetime="%1$s">%2$s</time><time class="updated" datetime="%3$s">%4$s</time>';
  66                 }
  67
  68                 $time_string = sprintf( $time_string,
  69                         esc_attr( get_the_date( 'c' ) ),
  70                         get_the_date(),
  71                         esc_attr( get_the_modified_date( 'c' ) ),
  72                         get_the_modified_date()
  73                 );
  74
  75                 printf( '<span class="posted-on"><span class="screen-reader-text">%1$s </span><a href="%2$s" rel="bookmark">%3$s</a></span>',
  76                         _x( 'Posted on', 'Used before publish date.', 'twentyfifteen' ),
  77                         esc_url( get_permalink() ),
  78                         $time_string
  79                 );
  80         }
  81
  82         if ( 'post' == get_post_type() ) {
  83                 if ( is_singular() || is_multi_author() ) {
  84                         printf( '<span class="byline"><span class="author vcard"><span class="screen-reader-text">%1$s </span><a class="url fn n" href="%2$s">%3$s</a></span></span>',
  85                                 _x( 'Author', 'Used before post author name.', 'twentyfifteen' ),
  86                                 esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
  87                                 get_the_author()
  88                         );
  89                 }
  90
  91                 $categories_list = get_the_category_list( _x( ', ', 'Used between list items, there is a space after the comma.', 'twentyfifteen' ) );
  92                 if ( $categories_list && twentyfifteen_categorized_blog() ) {
  93                         printf( '<span class="cat-links"><span class="screen-reader-text">%1$s </span>%2$s</span>',
  94                                 _x( 'Categories', 'Used before category names.', 'twentyfifteen' ),
  95                                 $categories_list
  96                         );
  97                 }
  98
  99                 $tags_list = get_the_tag_list( '', _x( ', ', 'Used between list items, there is a space after the comma.', 'twentyfifteen' ) );
 100                 if ( $tags_list ) {
 101                         printf( '<span class="tags-links"><span class="screen-reader-text">%1$s </span>%2$s</span>',
 102                                 _x( 'Tags', 'Used before tag names.', 'twentyfifteen' ),
 103                                 $tags_list
 104                         );
 105                 }
 106         }
 107
 108         if ( is_attachment() && wp_attachment_is_image() ) {
 109                 // Retrieve attachment metadata.
 110                 $metadata = wp_get_attachment_metadata();
 111
 112                 printf( '<span class="full-size-link"><span class="screen-reader-text">%1$s </span><a href="%2$s">%3$s &times; %4$s</a></span>',
 113                         _x( 'Full size', 'Used before full size attachment link.', 'twentyfifteen' ),
 114                         esc_url( wp_get_attachment_url() ),
 115                         $metadata['width'],
 116                         $metadata['height']
 117                 );
 118         }
 119
 120         if ( ! is_single() && ! post_password_required() && ( comments_open() || get_comments_number() ) ) {
 121                 echo '<span class="comments-link">';
 122                 comments_popup_link( __( 'Leave a comment', 'twentyfifteen' ), __( '1 Comment', 'twentyfifteen' ), __( '% Comments', 'twentyfifteen' ) );
 123                 echo '</span>';
 124         }
 125 }
 126 endif;
 127
 128 /**
 129  * Determine whether blog/site has more than one category.
 130  *
 131  * @since Twenty Fifteen 1.0
 132  *
 133  * @return bool True of there is more than one category, false otherwise.
 134  */
 135 function twentyfifteen_categorized_blog() {
 136         if ( false === ( $all_the_cool_cats = get_transient( 'twentyfifteen_categories' ) ) ) {
 137                 // Create an array of all the categories that are attached to posts.
 138                 $all_the_cool_cats = get_categories( array(
 139                         'fields'     => 'ids',
 140                         'hide_empty' => 1,
 141
 142                         // We only need to know if there is more than one category.
 143                         'number'     => 2,
 144                 ) );
 145
 146                 // Count the number of categories that are attached to the posts.
 147                 $all_the_cool_cats = count( $all_the_cool_cats );
 148
 149                 set_transient( 'twentyfifteen_categories', $all_the_cool_cats );
 150         }
 151
 152         if ( $all_the_cool_cats > 1 ) {
 153                 // This blog has more than 1 category so twentyfifteen_categorized_blog should return true.
 154                 return true;
 155         } else {
 156                 // This blog has only 1 category so twentyfifteen_categorized_blog should return false.
 157                 return false;
 158         }
 159 }
 160
 161 /**
 162  * Flush out the transients used in {@see twentyfifteen_categorized_blog()}.
 163  *
 164  * @since Twenty Fifteen 1.0
 165  */
 166 function twentyfifteen_category_transient_flusher() {
 167         // Like, beat it. Dig?
 168         delete_transient( 'twentyfifteen_categories' );
 169 }
 170 add_action( 'edit_category', 'twentyfifteen_category_transient_flusher' );
 171 add_action( 'save_post',     'twentyfifteen_category_transient_flusher' );
 172
 173 if ( ! function_exists( 'twentyfifteen_post_thumbnail' ) ) :
 174 /**
 175  * Display an optional post thumbnail.
 176  *
 177  * Wraps the post thumbnail in an anchor element on index views, or a div
 178  * element when on single views.
 179  *
 180  * @since Twenty Fifteen 1.0
 181  */
 182 function twentyfifteen_post_thumbnail() {
 183         if ( post_password_required() || is_attachment() || ! has_post_thumbnail() ) {
 184                 return;
 185         }
 186
 187         if ( is_singular() ) :
 188         ?>
 189
 190         <div class="post-thumbnail">
 191                 <?php the_post_thumbnail(); ?>
 192         </div><!-- .post-thumbnail -->
 193
 194         <?php else : ?>
 195
 196         <a class="post-thumbnail" href="<?php the_permalink(); ?>" aria-hidden="true">
 197                 <?php
 198                         the_post_thumbnail( 'post-thumbnail', array( 'alt' => get_the_title() ) );
 199                 ?>
 200         </a>
 201
 202         <?php endif; // End is_singular()
 203 }
 204 endif;
 205
 206 if ( ! function_exists( 'twentyfifteen_get_link_url' ) ) :
 207 /**
 208  * Return the post URL.
 209  *
 210  * Falls back to the post permalink if no URL is found in the post.
 211  *
 212  * @since Twenty Fifteen 1.0
 213  *
 214  * @see get_url_in_content()
 215  *
 216  * @return string The Link format URL.
 217  */
 218 function twentyfifteen_get_link_url() {
 219         $has_url = get_url_in_content( get_the_content() );
 220
 221         return $has_url ? $has_url : apply_filters( 'the_permalink', get_permalink() );
 222 }
 223 endif;
 224
 225 if ( ! function_exists( 'twentyfifteen_excerpt_more' ) && ! is_admin() ) :
 226 /**
 227  * Replaces "[...]" (appended to automatically generated excerpts) with ... and a 'Continue reading' link.
 228  *
 229  * @since Twenty Fifteen 1.0
 230  *
 231  * @return string 'Continue reading' link prepended with an ellipsis.
 232  */
 233 function twentyfifteen_excerpt_more( $more ) {
 234         $link = sprintf( '<a href="%1$s" class="more-link">%2$s</a>',
 235                 esc_url( get_permalink( get_the_ID() ) ),
 236                 /* translators: %s: Name of current post */
 237                 sprintf( __( 'Continue reading %s', 'twentyfifteen' ), '<span class="screen-reader-text">' . get_the_title( get_the_ID() ) . '</span>' )
 238                 );
 239         return ' &hellip; ' . $link;
 240 }
 241 add_filter( 'excerpt_more', 'twentyfifteen_excerpt_more' );
 242 endif;