source: extensions/DynamicResize/main.inc.php @ 30946

<?php
/*
Plugin Name: DynamicResize
Version: 0.3
Description: Allow to redim a picture server-side based on the client display
Plugin URI: http://fr.piwigo.org/forum/viewtopic.php?id=19304
*/
if (!defined('PHPWG_ROOT_PATH')) die('Hacking attempt!');
if (!defined('ROOT_URL')) define('ROOT_URL',  get_root_url().'/' ); // -> http://piwigo.cumulodata.com
define('DYN_NAME', 'Dynamic Resize');
define('DYN_PATH', dirname(__FILE__)); // /home/piwigo/webapp/web/plugin/dynamicResize
define('DYN_ROOT' , PHPWG_PLUGINS_PATH . basename(dirname(__FILE__))); // ./plugin/dynamicResize
define('ROOT_PATH','/home/piwigo/webapp/web/');
define('PATH', ROOT_URL.DYN_ROOT);

//load_language('plugin.lang', DYN_ROOT);

include_once DYN_ROOT.'/DynamicResize.class.php';

$obj = new DynamicResize();
$obj->load_config();
$debug_mode=0;
$dyn_mode=1; //load in flow, with cookie setting
//$dyn_mode=2; // load in XHR, wait for 2nd picture.

//NOT_USED// add_event_handler('loc_begin_picture','dynamic_resize_picture_content',50,2);
add_event_handler('render_element_content','dynamic_resize_picture_content',60 ,2);

// this is the custom  handler that generates the display for the element
function dynamic_resize_picture_content($content, $element_info){
 global $conf, $template,$debug_mode, $dyn_mode,$next_srcimg,$new_srcimg,$new_next_srcimg;

 $dyn_mode=1;
 $debug_mode=0;

//      $conf['dynamicResize'] = explode(',', $conf['dynamicResize']);
//      $debug_mode = $conf[0];
//      echo 'debug Mode'.$debug_mode;


 //echo 'dyn_mode:'.$dyn_mode;
 //NOT_USED//$template->set_prefilter('picture', 'dynamicResizeXHR');

 $srcimg = $template->get_template_vars('SRC_IMG');
 
 $next = $template->get_template_vars('next');
 $current = $template->get_template_vars('current');
 $new_srcimg='';

//@todo:deal with alternative methods
// $dynamic_srcimg = DYN_ROOT.'/resize.php?picture_url='.$srcimg;
// $dynamic_srcimg= DYN_ROOT.'/slir/w801-h553/'.$srcimg; 

 $template->set_filenames(array('dynamicresize' => DYN_PATH . '/dynamic_resize.tpl'));
 $template->assign(array(
                        'DYN_ROOT' => DYN_ROOT,
                        'ROOT_URL' => ROOT_URL,
                  ));

 if($dyn_mode==1){
        //FLOW MODE
        
        //autosize plugin
        if (isset($_COOKIE["dynamic_width"])) { $max_width=$_COOKIE["dynamic_width"];}
        if (isset($_COOKIE["dynamic_height"])) { $max_height=$_COOKIE["dynamic_height"];}       
        
        //stripped plugin
        if (isset($_COOKIE["stripped_max_width"])) { $max_width=$_COOKIE["stripped_max_width"];}
        if (isset($_COOKIE["stripped_max_height"])) { $max_height=$_COOKIE["stripped_max_height"];}
                
        $img_W0=$current['width'];
        $img_H0=$current['height'];

        $img_ratio=$img_W0/$img_H0;

        if($debug_mode){
                echo 'pic :'.$img_W0.'x'.$img_H0.'<br/>';
        }

        if(isset($max_width) && isset($max_height)){

                if($debug_mode){
                        echo 'max size :'.$max_width.'x'.$max_height.'<br/>';
                }

                if ($img_H0 >= $max_height) {
                        $dynamic_height=$max_height;
                }else{
                        $dynamic_height=$img_H0;
                }
                //TODO // if (img_H <= Hmin) img_H=Hmin;

                $dynamic_width = round($dynamic_height * $img_ratio);

                if ($dynamic_width >  $max_width)  {
                $dynamic_height = round($max_width / $img_ratio);
                //if (img_H <= Hmin) {
                //        img_H = Hmin;
                //        img_W = parseInt(img_H * img_ratio);
                //} else {
                $dynamic_width = $max_width;
                //}
                }
                if($debug_mode){
                        echo 'computed size pic :'.$dynamic_width.'x'.$dynamic_height.'<br/>';
                }

   //FOR PREFETCHING
                $isNext = isset($next) && isset($next['image_url']) && isset($next['width']) && isset($next['height']);
                if($isNext){
                        //NEXT PICTURE URL
                        if(substr($next['image_url'],0,1)=='.') {
                                $next_srcimg = substr($next['image_url'],1);
                        }else{
                                $next_srcimg = $next['image_url'];
                        }

                        if($debug_mode){
                                echo 'next pic image url : '.$next_srcimg.'<br/>';
                        }
                        //NEXT PICTURE SIZE
                        $next_W0=$next['width'];
                        $next_H0=$next['height'];
                        //print_r($next);

                        $next_ratio = $next_W0/$next_H0;

                        if($debug_mode){
                                echo 'next pic :'.$next_W0.'x'.$next_H0.'<br/>';
                        }

                        if ($next_H0 >= $max_height) {
                                $next_dynamic_height=$max_height;
                        }else{
                                $next_dynamic_height=$img_H0;
                        }
                        //TODO // if (img_H <= Hmin) img_H=Hmin;

                        $next_dynamic_width = round($next_dynamic_height * $next_ratio);

                        if ($next_dynamic_width >  $max_width)  {
                        $next_dynamic_height = round($max_width / $next_ratio);
                        //if (img_H <= Hmin) {
                //                img_H = Hmin;
                                //img_W = parseInt(img_H * img_ratio);
                         //} else {
                        $next_dynamic_width = $max_width;
                //      }
                        }
                        if($debug_mode){
                                echo 'next pic computed size:'.$next_dynamic_width.'x'.$next_dynamic_height.'<br/>';
                        }

                }
//height could be wrong on chrome, see http://bugs.jquery.com/ticket/7427
        }else{
                if($debug_mode) echo 'no max_width or height info available, downloading original size<br/>';   
        }

//GETTING PICTURE URL

        if(isset($dynamic_width) && isset($dynamic_height)){
                //@todo: deal with alternative methods
                if(substr($srcimg,0,1)=='.'){ $srcimg = substr($srcimg,1);} //remove leading '.' from path
                $new_srcimg = DYN_ROOT.'/slir/'.'w'.$dynamic_width.'-h'.$dynamic_height.$srcimg;
                
                if($isNext){
                        if(substr($next['image_url'],0,1)=='.') {
                                $next_srcimg = substr($next['image_url'],1);
                        }else{
                                $next_srcimg = $next['image_url'];
                        }
                        $new_next_srcimg = DYN_ROOT.'/slir/'.'w'.$next_dynamic_width.'-h'.$next_dynamic_height.$next_srcimg;
                }
                $template->assign('DYN_MODE', 'FLOW');
        }else{
                //get the original picture
                $new_srcimg = $srcimg;
                if(isset($next)) { $new_next_srcimg = $next_srcimg; }
                $template->assign('DYN_MODE', 'FLOW0');
        }
 }else if ($dyn_mode==2){
        //XHR MODE
        $new_srcimg = DYN_ROOT.'/images/spacer.gif';
        $template->assign('DYN_MODE', 'XHR');
        //@todo : deal with alternative methods
        //$template->assign('DYNAMIC_SRC_IMG', $dynamic_srcimg);
        $template->assign('DYNAMIC_SRC_IMG', $srcimg);
 }else{
        $new_srcimg = $srcimg;
        $template->assign('DYN_MODE', 'STD');
        if($debug_mode) echo 'Warning, mode should be 1 or 2. doing nothing';
 }

 if(isset($next)){
        $template->assign('NEXT',$next);
        $template->assign('NEXT_SRC_IMG',$new_next_srcimg);
 }
 $template->parse('dynamicresize',false);
 
 $template->assign('SRC_IMG', $new_srcimg);
 return $template->parse('default_content',true);
}

//Ajout du prefiltre
/*
add_event_handler('loc_begin_picture', 'dynamicResizePF', 65 );

function dynamicResizePF()
 {
$path = get_root_url().'plugins/'. basename(dirname(__FILE__)).'/';      
  global $template;
        $srcimg = $template->get_template_vars('SRC_IMG');


$template->append('head_elements', '
<script type="text/javascript">
var js_srcimg ="'.$srcimg.'";
</script>
<script type="text/javascript" src="'.$path.'scripts/xhrpic.js"></script>'
        );
}
*/

if($debug_mode==1 && $dyn_mode==2){
 echo '<div onclick="fire_ret_autosize();">Clickme to fire ret_autosize</div>';
}
?>