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add_filter('avf_builder_elements', 'register_meta_elements', 10, 1);
function register_meta_elements($avf_builder_elements) {
  $avf_builder_elements[] = array(
    "slug"  => "layout",
    "name"  => __("Header Position",'avia_framework'),
    "id"    => "header_position",
    "desc"  => "Select the position of the header",
    "type"  => "select",
    "std"   => "",
    "class" => "avia-style",
    "subtype" => array(
                        __("Default",'avia_framework') => '',
                        __('Top Header','avia_framework') =>'header_top',
                        __('Sidebar Header (Left)','avia_framework') =>'header_left header_sidebar',
                        __('Sidebar Header (Right)','avia_framework') =>'header_right header_sidebar',

                )
  );

  return $avf_builder_elements;
}

if(!function_exists('avia_header_setting'))
{
  function avia_header_setting($single_val = false)
  {
    global $avia_config;
    if(isset($avia_config['header_settings']) && $single_val && isset($avia_config['header_settings'][$single_val])) return $avia_config['header_settings'][$single_val];
    if(isset($avia_config['header_settings']) && !$single_val) return $avia_config['header_settings']; //return cached header setting if available

    $defaults = array(  'header_position' => 'header_top',
              'header_layout'=>'logo_left menu_right',
              'header_size'=>'slim',
              'header_custom_size'=>'',
              'header_sticky'=>'header_sticky',
              'header_shrinking'=>'header_shrinking',
              'header_title_bar'=>'',
              'header_social'=>'',
              'header_unstick_top' =>'',
              'header_secondary_menu'=>'',
              'header_stretch'=>'',
              'header_custom_size'=>'',
              'header_phone_active'=>'',
              'header_replacement_logo'=>'',
              'header_replacement_menu'=>'',
              'header_mobile_behavior' => '',
              'header_searchicon' => true,
              'header_mobile_activation' => 'mobile_menu_phone',
              'phone'=>'',
              'sidebarmenu_sticky' => 'conditional_sticky',
              'layout_align_content' => 'content_align_center',
              'sidebarmenu_widgets' => '',
              'sidebarmenu_social' => 'disabled',
              'header_menu_border' => '',
              'header_style'  => ''
              );

    $settings = avia_get_option();



    //overwrite with custom fields if they are set
    $post_id = avia_get_the_id();
    if($post_id && is_singular())
    {
      $custom_fields = get_post_custom($post_id);

      foreach($defaults as $key =>$default)
      {
        if(!empty($custom_fields[$key]) && !empty($custom_fields[$key][0]) )
        {
          $settings[$key] = $custom_fields[$key][0];
        }
      }

      //check if header transparency is set to true
      $transparency = post_password_required() ? false : get_post_meta($post_id, 'header_transparency', true);

      if(get_post_meta($post_id, 'header_position', true)){

        $header['header_position'] = get_post_meta($post_id, 'header_position', true);
      }

    }

    $header = shortcode_atts($defaults, $settings);
    $header['header_scroll_offset'] = avia_get_header_scroll_offset($header);

    if($header['header_position'] != "header_top") return avia_header_setting_sidebar($header, $single_val);

    //set header transparency
    $header['header_transparency'] = "";
    if(!empty($transparency)) $header['header_transparency'] = 'header_transparency';
    if(!empty($transparency) && strpos($transparency, 'glass')) $header['header_transparency'] .= ' header_glassy';
    if(!empty($transparency) && strpos($transparency, 'hidden')) $header['disabled'] = true;
    if(!empty($transparency) && strpos($transparency, 'scrolldown'))
    {
      $header['header_transparency'] .= ' header_scrolldown';
      $header['header_sticky'] = 'header_sticky';
    }


    //deactivate title bar if header is transparent
    if(!empty($transparency)) $header['header_title_bar'] = 'hidden_title_bar';

    //sticky and shrinking are tied together
    if($header['header_sticky'] == 'disabled') { $header['header_shrinking'] = 'disabled'; $header['header_scroll_offset'] =  0; }

    //if the custom height is less than 70 shrinking doesnt really work
    if($header['header_size'] == 'custom' && (int) $header['header_custom_size'] < 65) $header['header_shrinking'] = 'disabled';

    //create a header class so we can style properly
    $header_class_var = array(  'header_position',
                  'header_layout',
                  'header_size',
                  'header_sticky',
                  'header_shrinking',
                  'header_stretch',
                  'header_mobile_activation',
                  'header_transparency',
                  'header_searchicon',
                  'header_unstick_top',
                  'header_menu_border',
                  'header_style'
                );

    $header['header_class'] = "";

    foreach($header_class_var as $class_name)
    {
      if(!empty($header[$class_name]))
      {
        if($header[$class_name] == "disabled") $header[$class_name] = $class_name."_disabled";
        $header['header_class'] .= " av_".str_replace(' ',' av_',$header[$class_name]);
      }
    }

    //set manual flag if we should display the top bar
    $header['header_topbar'] = false;
    if(strpos($header['header_social'], 'extra_header_active') !== false || strpos($header['header_secondary_menu'], 'extra_header_active') !== false || !empty($header['header_phone_active'])){ $header['header_topbar'] = 'header_topbar_active'; }

    //set manual flag if the menu is at the bottom
    $header['bottom_menu'] = false;
    if(strpos($header['header_layout'],'bottom_nav_header') !== false)
    {
      $header['bottom_menu'] = 'header_bottom_menu_active';
    }
    else
    {
      $header['header_class'] .= " av_bottom_nav_disabled ";
    }


    //header class that tells us to use the alternate logo
    if(!empty($header['header_replacement_logo']))
    {
      $header['header_class'] .= " av_alternate_logo_active";
      if(is_numeric($header['header_replacement_logo']))
      {
        $header['header_replacement_logo'] = wp_get_attachment_image_src($header['header_replacement_logo'], 'full');
        $header['header_replacement_logo'] = $header['header_replacement_logo'][0];
      }

    }

    //header class that tells us to use the alternate logo
    if(empty($header['header_menu_border']))
    {
      $header['header_class'] .= " av_header_border_disabled";
    }

    $header = apply_filters('avf_header_setting_filter', $header);

    //make settings available globaly
    $avia_config['header_settings'] = $header;

    if(!empty($single_val) && isset($header[$single_val])) return $header[$single_val];

    return $header;
  }
}