[Summary view] [Print] [Text view]

   1  <?php
   2  /**
   3   * Common theme functions
   4   *
   5   * @package WordPress
   6   * @subpackage Twenty_Nineteen
   7   * @since Twenty Nineteen 1.5
   8   */
   9  
  10  /**
  11   * Determines if post thumbnail can be displayed.
  12   */
  13  function twentynineteen_can_show_post_thumbnail() {
  14      $show_post_thumbnail = ! post_password_required() && ! is_attachment() && has_post_thumbnail();
  15  
  16      /**
  17       * Filters whether to show post thumbnail.
  18       *
  19       * @since Twenty Nineteen 1.0
  20       *
  21       * @param bool $show_post_thumbnail Whether to show post thumbnail.
  22       */
  23      return apply_filters( 'twentynineteen_can_show_post_thumbnail', $show_post_thumbnail );
  24  }
  25  
  26  /**
  27   * Returns true if image filters are enabled on the theme options.
  28   */
  29  function twentynineteen_image_filters_enabled() {
  30      return 0 !== get_theme_mod( 'image_filter', 1 );
  31  }
  32  
  33  /**
  34   * Returns the size for avatars used in the theme.
  35   */
  36  function twentynineteen_get_avatar_size() {
  37      return 60;
  38  }
  39  
  40  /**
  41   * Returns true if comment is by author of the post.
  42   *
  43   * @see get_comment_class()
  44   *
  45   * @param WP_Comment|null $comment The comment object to check. Defaults to the current comment.
  46   * @return bool True if the comment is by the author of the post, false otherwise.
  47   */
  48  function twentynineteen_is_comment_by_post_author( $comment = null ) {
  49      if ( is_object( $comment ) && $comment->user_id > 0 ) {
  50          $user = get_userdata( $comment->user_id );
  51          $post = get_post( $comment->comment_post_ID );
  52          if ( ! empty( $user ) && ! empty( $post ) ) {
  53              return $comment->user_id === $post->post_author;
  54          }
  55      }
  56      return false;
  57  }
  58  
  59  /**
  60   * Returns information about the current post's discussion, with cache support.
  61   */
  62  function twentynineteen_get_discussion_data() {
  63      static $discussion, $post_id;
  64  
  65      $current_post_id = get_the_ID();
  66      if ( $current_post_id === $post_id ) {
  67          return $discussion; /* If we have discussion information for post ID, return cached object */
  68      } else {
  69          $post_id = $current_post_id;
  70      }
  71  
  72      $comments = get_comments(
  73          array(
  74              'post_id' => $current_post_id,
  75              'orderby' => 'comment_date_gmt',
  76              'order'   => get_option( 'comment_order', 'asc' ), /* Respect comment order from Settings » Discussion. */
  77              'status'  => 'approve',
  78              'number'  => 20, /* Only retrieve the last 20 comments, as the end goal is just 6 unique authors */
  79          )
  80      );
  81  
  82      $authors = array();
  83      foreach ( $comments as $comment ) {
  84          $authors[] = ( (int) $comment->user_id > 0 ) ? (int) $comment->user_id : $comment->comment_author_email;
  85      }
  86  
  87      $authors    = array_unique( $authors );
  88      $discussion = (object) array(
  89          'authors'   => array_slice( $authors, 0, 6 ),           /* Six unique authors commenting on the post. */
  90          'responses' => get_comments_number( $current_post_id ), /* Number of responses. */
  91      );
  92  
  93      return $discussion;
  94  }
  95  
  96  /**
  97   * Converts HSL to HEX or RGB colors.
  98   *
  99   * @param float $h      The hue component (0-360).
 100   * @param float $s      The saturation component (0-100).
 101   * @param float $l      The lightness component (0-100).
 102   * @param bool  $to_hex Whether to convert to HEX format (true) or RGB (false). Default true.
 103   */
 104  function twentynineteen_hsl_hex( $h, $s, $l, $to_hex = true ) {
 105  
 106      $h /= 360;
 107      $s /= 100;
 108      $l /= 100;
 109  
 110      $r = $l;
 111      $g = $l;
 112      $b = $l;
 113      $v = ( $l <= 0.5 ) ? ( $l * ( 1.0 + $s ) ) : ( $l + $s - $l * $s );
 114  
 115      if ( $v > 0 ) {
 116          $m       = $l + $l - $v;
 117          $sv      = ( $v - $m ) / $v;
 118          $h      *= 6.0;
 119          $sextant = floor( $h );
 120          $fract   = $h - $sextant;
 121          $vsf     = $v * $sv * $fract;
 122          $mid1    = $m + $vsf;
 123          $mid2    = $v - $vsf;
 124  
 125          switch ( $sextant ) {
 126              case 0:
 127                  $r = $v;
 128                  $g = $mid1;
 129                  $b = $m;
 130                  break;
 131              case 1:
 132                  $r = $mid2;
 133                  $g = $v;
 134                  $b = $m;
 135                  break;
 136              case 2:
 137                  $r = $m;
 138                  $g = $v;
 139                  $b = $mid1;
 140                  break;
 141              case 3:
 142                  $r = $m;
 143                  $g = $mid2;
 144                  $b = $v;
 145                  break;
 146              case 4:
 147                  $r = $mid1;
 148                  $g = $m;
 149                  $b = $v;
 150                  break;
 151              case 5:
 152                  $r = $v;
 153                  $g = $m;
 154                  $b = $mid2;
 155                  break;
 156          }
 157      }
 158  
 159      $r = round( $r * 255, 0 );
 160      $g = round( $g * 255, 0 );
 161      $b = round( $b * 255, 0 );
 162  
 163      if ( $to_hex ) {
 164  
 165          $r = ( $r < 15 ) ? '0' . dechex( $r ) : dechex( $r );
 166          $g = ( $g < 15 ) ? '0' . dechex( $g ) : dechex( $g );
 167          $b = ( $b < 15 ) ? '0' . dechex( $b ) : dechex( $b );
 168  
 169          return "#$r$g$b";
 170  
 171      }
 172  
 173      return "rgb($r, $g, $b)";
 174  }