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Inventory_Presser_Shortcode_Iframe

Inventory_Presser_Shortcode_Iframe

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Description Description

Creates a shortcode that makes it easy to create iframes. We've found this useful on most sites for a financing application that is hosted on a separate domain.

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Source Source

File: includes/shortcode/class-shortcode-iframe.php

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class Inventory_Presser_Shortcode_Iframe {
 
    /**
     * Adds two shortcodes
     *
     * @return void
     */
    public function add() {
        add_shortcode( 'invp-iframe', array( $this, 'content' ) );
        add_shortcode( 'invp_iframe', array( $this, 'content' ) );
    }
 
    /**
     * Adds hooks that power the shortcode
     *
     * @return void
     */
    public function add_hooks() {
        add_action( 'init', array( $this, 'add' ) );
    }
 
    /**
     * Creates the HTML content of the shortcode
     *
     * @param  array $atts An array of shortcode attributes.
     * @return string HTML that renders an iframe that expands to the height of its content
     */
    public function content( $atts ) {
        $script_handle = 'invp-iframe-resizer';
        if ( ! wp_script_is( $script_handle, 'registered' ) ) {
            Inventory_Presser_Plugin::include_scripts_and_styles();
        }
        wp_enqueue_script( $script_handle );
        wp_add_inline_script( $script_handle, 'iFrameResize({ log:false,sizeWidth:true });' );
 
        $atts = shortcode_atts(
            array(
                'width'       => '100%',
                'height'      => '5000',
                'scrolling'   => 'yes',
                'src'         => '',
                'class'       => 'iframe-class',
                'frameborder' => '0',
                'title'       => '',
            ),
            $atts
        );
 
        // Stock number may arrive in a querystring variable with key 'stock'.
        if ( isset( $_GET['stock'] ) ) {
            $atts['src'] = esc_url( add_query_arg( 'stock', sanitize_text_field( wp_unslash( $_GET['stock'] ) ), $atts['src'] ) );
        }
 
        $html = '<iframe';
        foreach ( $atts as $attr => $value ) {
 
            // ignore some attributes.
            $ignored_atts = array(
                'onclick',
                'onload',
                'onpageshow',
                'same_height_as',
            );
            if ( in_array( strtolower( $attr ), $ignored_atts, true ) ) {
                continue;
            }
 
            if ( '' !== $value ) { // adding all attributes.
                $html .= ' ' . esc_attr( $attr ) . '="' . esc_attr( $value ) . '"';
            } else { // adding empty attributes.
                $html .= ' ' . esc_attr( $attr );
            }
        }
        $html .= '></iframe>';
 
        if ( isset( $atts['same_height_as'] ) ) {
            $html .= sprintf(
                '<script>
                document.addEventListener("DOMContentLoaded", function(){
                    var target_element, iframe_element;
                    iframe_element = document.querySelector("iframe.%s");
                    target_element = document.querySelector("%s");
                    iframe_element.style.height = target_element.offsetHeight + "px";
                });
                </script>',
                esc_attr( $atts['class'] ),
                esc_attr( $atts['same_height_as'] )
            );
        }
 
        return $html;
    }
}

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Methods Methods

  • add — Adds two shortcodes
  • add_hooks — Adds hooks that power the shortcode
  • content — Creates the HTML content of the shortcode