class-gravityview-field-post-excerpt.php

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

class GravityView_Post_Excerpt extends GravityView_Field {

    var $name = 'post_excerpt';

    var $is_searchable = true;

    var $search_operators = array( 'contains', 'is', 'isnot', 'starts_with', 'ends_with' );

    var $_gf_field_class_name = 'GF_Field_Post_Excerpt';

    var $group = 'post';

    var $icon = 'dashicons-format-quote';

    public function __construct() {
        $this->label = esc_html__( 'Post Excerpt', 'gk-gravityview' );
        parent::__construct();
    }

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

        unset( $field_options['show_as_link'] );

        if( 'edit' === $context ) {
            return $field_options;
        }

        $this->add_field_support('dynamic_data', $field_options );

        return $field_options;
    }
}

new GravityView_Post_Excerpt;