includes/ajax.inc

   1 <?php
   2 require_once($path_to_root. "/includes/JsHttpRequest.php");
   3
   4 class Ajax extends JsHttpRequest {
   5
   6         var $aCommands = array();
   7         var $triggers = array();
   8
   9     function Ajax()
  10     {
  11           $this->JsHttpRequest($_SESSION['language']->encoding);
  12     }
  13         //
  14         //      This function is used in ctrl routines to activate
  15         //      update of ajaxified html element selected by given name/id.
  16         //
  17         function activate($trigname) {
  18           if (in_ajax()) {
  19                 $this->triggers[$trigname] = true;
  20           }
  21         }
  22         //
  23         //      Javascript clientside redirection.
  24         //      This is the last command added to reponse (if any).
  25         //
  26         function redirect($url) {
  27             if(in_ajax()) {
  28                         $this->_addCommand(true, array('n'=>'rd'), absolute_url($url));
  29                         $this->run();
  30             }
  31         }
  32         //
  33         // Popup window (target=_blank)
  34         //
  35         function popup($url) {
  36                   $this->_addCommand(true, array('n'=>'pu'), absolute_url($url));
  37         }
  38         //
  39         // Adds an executable Javascript code.
  40         //
  41         function addScript($trigger, $sJS)
  42         {
  43                 $this->_addCommand($trigger, array('n'=>'js'),$sJS);
  44                 return $this;
  45         }
  46         //
  47         // Assign target attribute with data.
  48         //
  49         function addAssign($trigger, $sTarget,$sAttribute,$sData)
  50         {
  51                 $this->_addCommand($trigger, array('n'=>'as','t'=>$sTarget,'p'=>$sAttribute),$sData);
  52                 return $this;
  53         }
  54         //
  55         // Updates input element or label with data.
  56         //
  57         function addUpdate($trigger, $sTarget, $sData)
  58         {
  59                 $this->_addCommand($trigger, array('n'=>'up','t'=>$sTarget),$sData);
  60                 return $this;
  61         }
  62         //
  63         // Set disable state of element.
  64         //
  65         function addDisable($trigger, $sTarget, $sData=true)
  66         {
  67                 $this->_addCommand($trigger, array('n'=>'di','t'=>$sTarget),$sData);
  68                 return $this;
  69         }
  70         //
  71         // Set state of element to enabled.
  72         //
  73         function addEnable($trigger, $sTarget, $sData=true)
  74         {
  75                 $this->_addCommand($trigger, array('n'=>'di','t'=>$sTarget), !$sData);
  76                 return $this;
  77         }
  78         //
  79         // Set current focus.
  80         //
  81         function addFocus($trigger, $sTarget)
  82         {
  83                 $this->_addCommand($trigger, array('n'=>'fc'),$sTarget);
  84                 return $this;
  85         }
  86         //
  87         // Internal procedure adding command to response.
  88         //
  89         function _addCommand($trigger, $aAttributes, $mData)
  90         {
  91           if ($this->isActive() && ($trigger !== false)) {
  92 //              display_error('adding '.$trigger.':'.htmlentities($mData));
  93
  94                 $aAttributes['why'] = $trigger;
  95                 $aAttributes['data'] = $mData;
  96                 $this->aCommands[] = $aAttributes;
  97           }
  98         }
  99         /*
 100         * Register binds function with ajax call parameter
 101
 102         function register($trigger, $function)
 103         {
 104             if (isset($_REQUEST[$trigger])) {
 105                 $function(&$this);
 106             }
 107         }
 108         */
 109         function run() {
 110
 111             if (!$this->isActive()) return;
 112
 113                 // remove not active commands
 114                 foreach ($this->aCommands as $idx => $com) {
 115 // If we should reload whole page content ignore all commands but the update.
 116 // This is page repost equivalent, although header and footer are not reloaded.
 117                   if ($com['why'] !== true && !isset($this->triggers[$com['why']])) {
 118                         unset($this->aCommands[$idx]);
 119 //                      display_error('unset '.$com['t']);
 120                   }
 121                   else
 122                   if($com['n'] == 'up' && $com['t'] == '_page_body') {
 123                           $cmds = array($com);
 124                           foreach( $this->aCommands as $k=> $cmd) {
 125                                 if ($cmd['n'] == 'fc') {        // save focus
 126                                         $cmds[] = $cmd; break;
 127                                 }
 128                           }
 129                           $this->aCommands = $cmds;
 130                           break;
 131                   }
 132                 }
 133 //              display_error('Activate:'.htmlentities(print_r($this->triggers, true)));
 134 //              display_error('Commands :'.htmlentities(print_r($this->aCommands, true)));
 135             $GLOBALS['_RESULT'] = $this->aCommands;
 136 //          exit();
 137         }
 138 }
 139
 140 function in_ajax() {
 141     global $Ajax;
 142     return $Ajax->isActive();
 143 }
 144
 145 // Returns absolute path of relative $url. To be used in ajax calls
 146 // for proper redirection from any referer page.
 147 //
 148 function absolute_url($url)
 149 {
 150    return strpos($url, '..')===0 ? dirname($_SERVER['PHP_SELF']).'/'.$url : $url;
 151 }
 152 ?>