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                   $this->_addCommand(true, array('n'=>'rd'),$url);
  29                   $this->run();
  30             }
  31         }
  32         //
  33         // Adds an executable Javascript code.
  34         //
  35         function addScript($trigger, $sJS)
  36         {
  37                 $this->_addCommand($trigger, array('n'=>'js'),$sJS);
  38                 return $this;
  39         }
  40         //
  41         // Assign target attribute with data.
  42         //
  43         function addAssign($trigger, $sTarget,$sAttribute,$sData)
  44         {
  45                 $this->_addCommand($trigger, array('n'=>'as','t'=>$sTarget,'p'=>$sAttribute),$sData);
  46                 return $this;
  47         }
  48         //
  49         // Updates input element or label with data.
  50         //
  51         function addUpdate($trigger, $sTarget, $sData)
  52         {
  53                 $this->_addCommand($trigger, array('n'=>'up','t'=>$sTarget),$sData);
  54                 return $this;
  55         }
  56         //
  57         // Set disable state of element.
  58         //
  59         function addDisable($trigger, $sTarget, $sData=true)
  60         {
  61                 $this->_addCommand($trigger, array('n'=>'di','t'=>$sTarget),$sData);
  62                 return $this;
  63         }
  64         //
  65         // Set state of element to enabled.
  66         //
  67         function addEnable($trigger, $sTarget, $sData=true)
  68         {
  69                 $this->_addCommand($trigger, array('n'=>'di','t'=>$sTarget), !$sData);
  70                 return $this;
  71         }
  72         //
  73         // Set current focus.
  74         //
  75         function addFocus($trigger, $sTarget)
  76         {
  77                 $this->_addCommand($trigger, array('n'=>'fc'),$sTarget);
  78                 return $this;
  79         }
  80         //
  81         // Internal procedure adding command to response.
  82         //
  83         function _addCommand($trigger, $aAttributes, $mData)
  84         {
  85           if ($this->isActive() && ($trigger !== false)) {
  86 //              display_error('adding '.$trigger.':'.htmlentities($mData));
  87
  88                 $aAttributes['why'] = $trigger;
  89                 $aAttributes['data'] = $mData;
  90                 $this->aCommands[] = $aAttributes;
  91           }
  92         }
  93         /*
  94         * Register binds function with ajax call parameter
  95
  96         function register($trigger, $function)
  97         {
  98             if (isset($_REQUEST[$trigger])) {
  99                 $function(&$this);
 100             }
 101         }
 102         */
 103         function run() {
 104
 105             if (!$this->isActive()) return;
 106
 107                 // remove not active commands
 108                 foreach ($this->aCommands as $idx => $com) {
 109 // If we should reload whole page content ignore all commands but the update.
 110 // This is page repost equivalent, although header and footer are not reloaded.
 111                   if ($com['why'] !== true && !isset($this->triggers[$com['why']])) {
 112                         unset($this->aCommands[$idx]);
 113 //                      display_error('unset '.$com['t']);
 114                   }
 115                   else
 116                   if($com['n'] == 'up' && $com['t'] == '_page_body') {
 117                           $cmds = array($com);
 118                           foreach( $this->aCommands as $k=> $cmd) {
 119                                 if ($cmd['n'] == 'fc') {        // save focus
 120                                         $cmds[] = $cmd; break;
 121                                 }
 122                           }
 123                           $this->aCommands = $cmds;
 124                           break;
 125                   }
 126                 }
 127 //              display_error('Activate:'.htmlentities(print_r($this->triggers, true)));
 128 //              display_error('Commands :'.htmlentities(print_r($this->aCommands, true)));
 129             $GLOBALS['_RESULT'] = $this->aCommands;
 130 //          exit();
 131         }
 132 }
 133
 134 function in_ajax() {
 135     global $Ajax;
 136     return $Ajax->isActive();
 137 }
 138
 139 ?>