reference-footnotes.php

<?php
/**
 * Plugin Name: Reference Footnotes Editor Button
 * Description: Add Reference Footnotes to the toolbar of TinyMCE Editor for automatically insert Reference Footnotes shortcode: ```[ref]...[/ref]```
 * Version: 1.0.3
 * Author: ODC: Huy Eng
 * License: CC0
 * Text Domain: reference-footnotes
 * Domain Path: languages/
 * Note: Based on Simple Footnotes Editor Button
 */

if ( !class_exists( 'reference_footnotes_TinyMCE' ) ) {

    class reference_footnotes_TinyMCE
    {

        function __construct()
        {
            add_action( 'wp_enqueue_scripts', array( &$this, 'add_script' ), 11 );
            add_action( 'init', array( &$this, 'init' ) );

            add_shortcode( 'ref', array( &$this, 'shortcode' ) );

            add_filter( 'img_caption_shortcode', array( &$this, 'nested_img_caption_shortcode' ), 1, 3 );
            add_filter( 'the_content', array( &$this, 'the_content' ), 12 );
        }

        function init()
        {
            add_filter( 'mce_external_plugins', array( $this, 'add_buttons_reference_footnotes' ) );
            add_filter( 'mce_buttons', array( $this, 'register_buttons_reference_footnotes' ) );

            load_plugin_textdomain( 'reference-footnotes', false, dirname( plugin_basename( __FILE__ ) ) . '/i18n' );

            if ( ( current_user_can( 'edit_posts' ) || current_user_can( 'edit_pages' ) ) && 'true' == get_user_option( 'rich_editing' ) ) {
                wp_enqueue_script( array( 'wpdialogs' ) );
                wp_enqueue_style( 'wp-jquery-ui-dialog' );

                add_action( 'admin_footer', array( $this, 'builder_reference_footnotes' ) );
            }
        }

        public function add_script()
        {
            wp_enqueue_style( "reference_footnotes_css", plugins_url( "rfootnotes.css", __FILE__ ) );

            if ( get_post_type() == 'profiles' ) {
                wp_enqueue_script( 'reference_footnotes_script', plugins_url( 'rfootnotes.js', __FILE__ ) );
            }
        }

        /**
         * Add Reference Footnotes button to TinyMCE Editor
         *
         * @param [type] $plugins
         * @return void
         */
        function add_buttons_reference_footnotes( $plugins )
        {
            $plugins['referencefootnote'] = plugins_url( '/js/tinymce.js', __FILE__ );

            return $plugins;
        }

        /**
         * Register Reference Footnotes button to TinyMCE Editor
         *
         * @param [type] $buttons
         * @return void
         */
        function register_buttons_reference_footnotes( $buttons )
        {
            $buttons[] = 'referencefootnote';

            return $buttons;
        }

        /**
         * Render Reference Footnotes Form Builder on modal panel
         *
         * @return void
         */
        function builder_reference_footnotes()
        { ?>
            <div style="display:none;">
                <form id="reference-footnotes" tabindex="-1">
                    <div style="margin: 1em">
                        <p class="howto"><?php _e( 'Enter the content of the reference footnote', 'reference-footnotes' ); ?></p>
                        <textarea id="reference-footnotes-content" rows="4" style="width: 95%; margin-bottom: 1em"></textarea>
                        <div class="submitbox" style="margin-bottom: 1em">
                            <div id="reference-footnotes-insert" class="alignright">
                                <input type="submit" value="<?php esc_attr_e( 'Insert', 'reference-footnotes' ); ?>" class="button-primary">
                            </div>
                            <div id="reference-footnotes-cancel">
                                <a class="submitdelete deletion" href="#"><?php _e( 'Cancel', 'reference-footnotes' ); ?></a>
                            </div>
                        </div>
                    </div>
                </form>
            </div>

            <?php
        }

        function reference_footnotes( $content )
        {
            global $id;

            if ( empty( $this->reference_footnotes[$id] ) )
                return $content;

            $content .= '<div class="reference-footnote">';
            $content .= '<h4 id="reference-notes">' . __( 'References', 'reference-footnotes' ) . '</h4>';
            $content .= '<ol id="reference-list">';

            foreach ( array_filter( $this->reference_footnotes[$id] ) as $num => $note ) {
                $content .= '<li id="ref-' . $id . '-' . $num . '"><a href="#return-note-' . $id . '-' . $num . '">' . sprintf( _n( '%s', '%s', $num, 'tereference-footnotesst' ), $num ) . '</a>. ' . do_shortcode( $note ) . '</li>';
            }

            $content .= '</ol></div>';

            return $content;
        }

        /**
         * Render Note Number
         *
         * @param array $atts
         * @param string $content
         * @return string
         */
        public function shortcode( $atts, $content = null )
        {
            global $id;

            $note_number = '';

            if ( null === $content )
                return $note_number;
            
            if ( !isset( $this->reference_footnotes[$id] ) )
                $this->reference_footnotes[$id] = array( 0 => false );

            $this->reference_footnotes[$id][] = $content;
            
            $note = count( $this->reference_footnotes[$id] ) - 1;

            $note_number = '<sup><a class="reference_footnote" title="' . esc_attr( wp_strip_all_tags( $content ) ) . '" id="return-note-' . $id . '-' . $note . '" href="#ref-' . $id . '-' . $note . '">' . $note . '</a></sup>';

            return $note_number;
        }

        /**
         * Overwrite default the_content() function to include Reference List section
         *
         * @param string $content
         * @return string
         */
        public function the_content( $content )
        {
            if ( isset( $GLOBALS['multipage'] ) && !$GLOBALS['multipage'] )
                return $this->reference_footnotes( $content );

            return $content;
        }

        public function nested_img_caption_shortcode( $empty, $attr, $content = null )
        {
            extract(
                shortcode_atts(
                    array(
                        'id'        => '',
                        'align'     => 'alignnone',
                        'width'     => '',
                        'caption'   => ''
                    ),
                    $attr,
                    'caption'
                )
            );

            $caption = do_shortcode( $caption );

            if ( 1 > ( int ) $width || empty( $caption ) ):
                return $content;
            endif;

            if ( $id ):
                $id = 'id="' . esc_attr( $id ) . '" ';
            endif;

            return '<div ' . $id . 'class="wp-caption ' . esc_attr( $align ) . '" style="width: ' . ( 10 + ( int ) $width ) . 'px">' . do_shortcode( $content ) . '<p class="wp-caption-text">' . $caption . '</p></div>';
        }

    }

}

if ( class_exists( 'reference_footnotes_TinyMCE' ) ) {
    $reference_footnotes_TinyMCE = new reference_footnotes_TinyMCE();
}