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   1  <?php
   2  /**
   3   * Additional features to allow styling of the templates.
   4   *
   5   * @package WordPress
   6   * @subpackage Twenty_Seventeen
   7   * @since Twenty Seventeen 1.0
   8   */
   9  
  10  /**
  11   * Adds custom classes to the array of body classes.
  12   *
  13   * @param array $classes Classes for the body element.
  14   * @return array
  15   */
  16  function twentyseventeen_body_classes( $classes ) {
  17      // Add class of group-blog to blogs with more than 1 published author.
  18      if ( is_multi_author() ) {
  19          $classes[] = 'group-blog';
  20      }
  21  
  22      // Add class of hfeed to non-singular pages.
  23      if ( ! is_singular() ) {
  24          $classes[] = 'hfeed';
  25      }
  26  
  27      // Add class if we're viewing the Customizer for easier styling of theme options.
  28      if ( is_customize_preview() ) {
  29          $classes[] = 'twentyseventeen-customizer';
  30      }
  31  
  32      // Add class on front page.
  33      if ( is_front_page() && 'posts' !== get_option( 'show_on_front' ) ) {
  34          $classes[] = 'twentyseventeen-front-page';
  35      }
  36  
  37      // Add a class if there is a custom header.
  38      if ( has_header_image() ) {
  39          $classes[] = 'has-header-image';
  40      }
  41  
  42      // Add class if sidebar is used.
  43      if ( is_active_sidebar( 'sidebar-1' ) && ! is_page() ) {
  44          $classes[] = 'has-sidebar';
  45      }
  46  
  47      // Add class for one or two column page layouts.
  48      if ( is_page() || is_archive() ) {
  49          if ( 'one-column' === get_theme_mod( 'page_layout' ) ) {
  50              $classes[] = 'page-one-column';
  51          } else {
  52              $classes[] = 'page-two-column';
  53          }
  54      }
  55  
  56      // Add class if the site title and tagline is hidden.
  57      if ( 'blank' === get_header_textcolor() ) {
  58          $classes[] = 'title-tagline-hidden';
  59      }
  60  
  61      // Get the colorscheme or the default if there isn't one.
  62      $colors    = twentyseventeen_sanitize_colorscheme( get_theme_mod( 'colorscheme', 'light' ) );
  63      $classes[] = 'colors-' . $colors;
  64  
  65      return $classes;
  66  }
  67  add_filter( 'body_class', 'twentyseventeen_body_classes' );
  68  
  69  /**
  70   * Counts the number of our active panels.
  71   *
  72   * Primarily used to see if we have any panels active.
  73   *
  74   * @return int The number of active panels.
  75   */
  76  function twentyseventeen_panel_count() {
  77  
  78      $panel_count = 0;
  79  
  80      /**
  81       * Filters the number of front page sections in Twenty Seventeen.
  82       *
  83       * @since Twenty Seventeen 1.0
  84       *
  85       * @param int $num_sections Number of front page sections.
  86       */
  87      $num_sections = apply_filters( 'twentyseventeen_front_page_sections', 4 );
  88  
  89      // Create a setting and control for each of the sections available in the theme.
  90      for ( $i = 1; $i < ( 1 + $num_sections ); $i++ ) {
  91          if ( get_theme_mod( 'panel_' . $i ) ) {
  92              ++$panel_count;
  93          }
  94      }
  95  
  96      return $panel_count;
  97  }
  98  
  99  /**
 100   * Checks to see if we are on the front page or not.
 101   *
 102   * @return bool Whether we are on the front page or not.
 103   */
 104  function twentyseventeen_is_frontpage() {
 105      return ( is_front_page() && ! is_home() );
 106  }