Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
Gravity Wiz // Gravity Forms Live Preview
<?php
# Default Usage
new GWLivePreview();
# With Configuration Options (hide title, hide description, enable ajax)
new GWLivePreview( array(
'title' => false,
'description' => false,
'ajax' => true
) );
<?php
/**
* Gravity Wiz // Gravity Forms Live Preview
*
* Preview your Gravity forms on the frontend of your website. Adds a "Live Preview" link to the Gravity Forms toolbar.
*
* @version 1.0.1
* @author David Smith <david@gravitywiz.com>
* @license GPL-2.0+
* @link http://gravitywiz.com/...
* @copyright 2013 Gravity Wiz
*/
class GWLivePreview {
var $post_type = 'gw_live_preview';
var $preview_post = null;
function __construct( $args = array() ) {
if( ! property_exists( 'GFCommon', 'version' ) || ! version_compare( GFCommon::$version, '1.8', '>=' ) )
return;
$this->_args = wp_parse_args( $args, array(
'id' => 0,
'title' => true,
'description' => true,
'ajax' => false
) );
add_action( 'admin_footer', array( $this, 'display_preview_link' ) );
add_action( 'init', array( $this, 'register_preview_post_type' ) );
add_action( 'parse_query', array( $this, 'maybe_load_preview_functionality' ) );
}
# ADMIN FUNCTIONS
function display_preview_link() {
if( ! $this->is_applicable_admin_page() )
return;
$form_id = rgget( 'id' );
$url = get_post_type_archive_link( $this->post_type ) . '?id=' . $form_id;
?>
<script type="text/javascript">
(function($){
$( '<li class="gf_form_toolbar_preview"><a style="position:relative" id="gw-live-preview" href="<?php echo $url; ?>" target="_blank">' +
'<i class="fa fa-eye" style="position: absolute; text-shadow: 0px 0px 5px rgb(255, 255, 255); z-index: 99; line-height: 7px; left: 0px font-size: 9px; top: 20px; background-color: rgb(243, 243, 243);"></i>' +
'<i class="fa fa-file-o" style="margin-left: 5px; line-height: 12px; font-size: 18px; position: relative; top: 2px;"></i>' +
'<span style="padding-left:4px;"><?php _e( 'Live Preview' ); ?></span>' +
'</a></li>' )
.insertAfter( 'li.gf_form_toolbar_preview' );
})(jQuery);
</script>
<?php
}
function is_applicable_admin_page() {
return in_array( rgget( 'page' ), array( 'gf_edit_forms', 'gf_entries' ) ) && rgget( 'id' );
}
# FRONTEND FUNCTIONS
function register_preview_post_type() {
$args = array(
'label' => __( 'Form Preview' ),
'description' => __( 'A post type created for previewing Gravity Forms forms on the frontend.' ),
'public' => false,
'publicly_queryable' => true,
'has_archive' => true,
'can_export' => false,
'supports' => false,
'rewrite' => array(
'slug' => 'gravity-forms-preview',
'feeds' => false,
'pages' => false
)
);
register_post_type( $this->post_type, $args );
}
function maybe_load_preview_functionality( $wp_query ) {
if( ! $wp_query->is_main_query() || ! $this->is_live_preview() ) {
return;
}
$this->live_preview_hooks();
$wp_query->query_vars['p'] = $this->get_preview_post( 'ID' );
add_action( 'wp', array( $this, 'populate_post_content_for_gf_scripts_styles' ), 9 );
}
public function populate_post_content_for_gf_scripts_styles() {
global $wp_query;
foreach( $wp_query->posts as &$post ) {
$post->post_content = $this->get_shortcode();
}
}
function get_preview_post( $prop = false ) {
$preview_posts = get_posts( array( 'post_type' => $this->post_type ) );
$preview_post = false;
// if there are no preview posts, create one
if( empty( $preview_posts ) ) {
$post_id = wp_insert_post( array(
'post_type' => $this->post_type,
'post_title' => __( 'Form Preview', 'gravityforms' ),
'post_status' => 'publish'
) );
$preview_post = get_post( $post_id );
}
// otherwise, use the first preview post (there should only be one)
else {
$preview_post = $preview_posts[0];
}
if( ! $preview_post ) {
return false;
} else if( $prop ) {
return $preview_post->$prop;
} else {
return $preview_post;
}
}
function live_preview_hooks() {
add_filter( 'template_include', array( $this, 'load_preview_template' ), 11 );
add_filter( 'the_content', array( $this, 'modify_preview_post_content' ) );
}
function load_preview_template( $template ) {
$page_template = get_page_template();
if( $page_template )
return $page_template;
$single_template = get_single_template();
if( $single_template )
return $single_template;
return $template;
}
function modify_preview_post_content( $content ) {
return $this->get_shortcode();
}
function get_shortcode( $args = array() ) {
if( ! is_user_logged_in() )
return '<p>' . __( 'You need to log in to preview forms.' ) . '</p>' . wp_login_form( array( 'echo' => false ) );
if( ! GFCommon::current_user_can_any( 'gravityforms_preview_forms' ) )
return __( 'Oops! It doesn\'t look like you have the necessary permission to preview this form.' );
if( empty( $args ) )
$args = $this->get_shortcode_parameters_from_query_string();
extract( wp_parse_args( $args, $this->_args ) );
$title = $this->is_true_value( $title ) ? 'true' : 'false';
$description = $this->is_true_value( $description ) ? 'true' : 'false';
$ajax = $this->is_true_value( $ajax ) ? 'true' : 'false';
return "[gravityform id='$id' title='$title' description='$description' ajax='$ajax']";
}
function get_shortcode_parameters_from_query_string() {
return array_filter( array(
'id' => rgget( 'id' ),
'title' => rgget( 'title' ),
'description' => rgget( 'description' ),
'ajax' => rgget( 'ajax' )
) );
}
function is_true_value( $value ) {
return $value === true || intval( $value ) === 1 || strtolower( $value ) === 'true';
}
function is_live_preview() {
return is_post_type_archive( $this->post_type );
}
}
new GWLivePreview();
@cobrank

This comment has been minimized.

Copy link

@cobrank cobrank commented Sep 8, 2015

How to use this code?

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment