class-gravityview-field-section.php

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<?php
/**
 * @file class-gravityview-field-section.php
 * @package GravityView
 * @subpackage includes\fields
 */

/**
 * Add custom options for HTML field
 */
class GravityView_Field_Section extends GravityView_Field {

    var $name = 'section';

    var $is_searchable = false;

    var $_gf_field_class_name = 'GF_Field_Section';

    var $group = 'standard';

    var $icon = 'dashicons-minus';

    public function __construct() {
        $this->label = esc_html__( 'Section', 'gk-gravityview' );

        parent::__construct();

        add_filter( 'gravityview_field_entry_value_section', array( $this, 'prevent_empty_field' ) );
    }

    /**
     * Prevent Sections from being hidden when "Hide Empty Fields" is checked in View settings
     *
     * @since 1.15.1
     *
     * @param string $output Existing section field output
     *
     * @return string If output was empty, return an empty HTML comment tag. Otherwise, return output.
     */
    function prevent_empty_field( $output = '' ) {
        return empty( $output ) ? '<!-- -->' : $output;
    }

    public function field_options( $field_options, $template_id, $field_id, $context, $input_type, $form_id ) {

        unset ( $field_options['search_filter'], $field_options['show_as_link'] );

        // Set the default CSS class to gv-section, which applies a border and top/bottom margin
        $field_options['custom_class']['value'] = 'gv-section';

        return $field_options;
    }

}

new GravityView_Field_Section;