source: extensions/rv_tscroller/main.inc.php @ 25035

<?php /*
Plugin Name: RV Thumb Scroller
Version: 2.5.a
Plugin URI: http://piwigo.org/ext/extension_view.php?eid=493
Description: Infinite scroll - loads thumbnails on index page as you scroll down the page
Author: rvelices
Author URI: http://www.modusoptimus.com
*/
define('RVTS_VERSION', '25a');

class RVTS
{
static function on_end_section_init()
{
        global $page;
        $page['nb_image_page'] *= pwg_get_session_var('rvts_mult', 1);
        if (count($page['items'])<$page['nb_image_page']+3)
        {
                if (!@$page['start'] || script_basename()=='picture')
                        $page['nb_image_page'] = max($page['nb_image_page'], count($page['items']));
        }
        add_event_handler('loc_begin_index', array('RVTS','on_index_begin'), EVENT_HANDLER_PRIORITY_NEUTRAL+10);
}

static function on_index_begin()
{
        global $page;
        $is_ajax = isset($_GET['rvts']);
        if (!$is_ajax)
        {
                if (empty($page['items']))
                        add_event_handler('loc_end_index', array('RVTS','on_end_index'));
                else
                        add_event_handler('loc_end_index_thumbnails', array('RVTS','on_index_thumbnails'), EVENT_HANDLER_PRIORITY_NEUTRAL, 1);
        }
        else
        {
                $adj = (int)@$_GET['adj'];
                if ($adj)
                {
                        $mult = pwg_get_session_var('rvts_mult', 1);
                        if ($adj>0 && $mult<5)
                                pwg_set_session_var('rvts_mult', ++$mult);
                        if ($adj<0 && $mult>1)
                                pwg_set_session_var('rvts_mult', --$mult);
                }
                $page['nb_image_page']=(int)$_GET['rvts'];
                add_event_handler('loc_end_index_thumbnails', array('RVTS','on_index_thumbnails_ajax'), EVENT_HANDLER_PRIORITY_NEUTRAL+5, 1);
                $page['root_path'] = get_absolute_root_url(false);
                $page['body_id'] = 'scroll';
                global $user, $template, $conf;
                include(PHPWG_ROOT_PATH.'include/category_default.inc.php');
        }
}

static function on_index_thumbnails($thumbs)
{
        global $page, $template;
        $total = count($page['items']);
        if (count($thumbs) >= $total)
        {
                add_event_handler('loc_end_index', array('RVTS','on_end_index'));
                return $thumbs;
        }
        $url_model = str_replace('123456789', '%start%', duplicate_index_url( array('start'=>123456789) ) );
        $ajax_url_model = add_url_params($url_model, array( 'rvts'=>'%per%' ) );

        $url_model = str_replace('&amp;', '&', $url_model);
        $ajax_url_model = str_replace('&amp;', '&', $ajax_url_model);
        
        $my_base_name = basename(dirname(__FILE__));
        $ajax_loader_image = get_root_url()."plugins/$my_base_name/ajax-loader.gif";
        $template->func_combine_script( array(
                        'id'=> 'jquery',
                        'load'=> 'footer',
                        'path'=> 'themes/default/js/jquery.min.js',
                ));
        $template->func_combine_script( array(
                        'id'=> $my_base_name,
                        'load'=> 'async',
                        'path'=> 'plugins/'.$my_base_name.'/rv_tscroller.min.js',
                        'require' => 'jquery',
                        'version' => RVTS_VERSION,
                ));
        $start = (int)$page['start'];
        $per_page = $page['nb_image_page'];
        $moreMsg = 'See the remaining %d photos';
        if ('en' != $GLOBALS['lang_info']['code'])
        {
                load_language('lang', dirname(__FILE__).'/');
                $moreMsg = l10n($moreMsg);
        }

        // the String.fromCharCode comes from google bot which somehow manage to get these urls
        $template->block_footer_script(null,
                "var RVTS = {
ajaxUrlModel: String.fromCharCode(".ord($ajax_url_model[0]).")+'".substr($ajax_url_model,1)."',
start: $start,
perPage: $per_page,
next: ".($start+$per_page).",
total: $total,
moreUrlModel: String.fromCharCode(".ord($url_model[0]).")+'".substr($url_model,1)."',
moreMsg: '$moreMsg',
prevMsg: '".l10n("Previous")."',
ajaxLoaderImage: '$ajax_loader_image'
};
jQuery('.navigationBar').hide();");
        return $thumbs;
}

static function on_index_thumbnails_ajax($thumbs)
{
        global $template;
        $template->assign('thumbnails', $thumbs);
        header('Content-Type: text/html; charset='.get_pwg_charset());
        $template->pparse('index_thumbnails');
        exit;
}

static function on_end_index()
{
        global $template;
        $req = null;
        foreach($template->scriptLoader->get_all() as $script)
        {
                if($script->load_mode==2 && !$script->is_remote() && count($script->precedents)==0)
                        $req = $script->id;
        }
        if($req!=null)
        {
                $my_base_name = basename(dirname(__FILE__));
                $template->func_combine_script( array(
                        'id'=> $my_base_name,
                        'load'=> 'async',
                        'path'=> 'plugins/'.$my_base_name.'/rv_tscroller.min.js',
                        'require' => $req,
                        'version' => RVTS_VERSION,
                ), $template->smarty);
        }
        //var_export($template->scriptLoader);
}

}

add_event_handler('loc_end_section_init', array('RVTS','on_end_section_init'));
?>