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<?php
/**
* The Horde_Form_Action class provides an API for adding actions to
* Horde_Form variables.
*
* $Horde: framework/Form/Form/Action.php,v 1.19.10.6 2006/01/01 21:28:17 jan Exp $
* Copyright 2002-2006 Chuck Hagenbuch <chuck@horde.org>
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
*
* @author Chuck Hagenbuch <chuck@horde.org>
* @package Horde_Form
*/
class Horde_Form_Action {
var $_id;
var $_params;
var $_trigger = null;
function Horde_Form_Action($params = null)
{
$this->_params = $params;
$this->_id = md5(mt_rand());
}
function getTrigger()
{
return $this->_trigger;
}
function id()
{
return $this->_id;
}
function getActionScript($form, $renderer, $varname)
{
return '';
}
function printJavaScript()
{
}
function _printJavaScriptStart()
{
echo '<script type="text/javascript"><!--';
}
function _printJavaScriptEnd()
{
echo '// --></script>';
}
function getTarget()
{
return isset($this->_params['target']) ? $this->_params['target'] : null;
}
function setValues(&$vars, $sourceVal, $index = null, $arrayVal = false)
{
}
/**
* Attempts to return a concrete Horde_Form_Action instance
* based on $form.
*
* @param mixed $form The type of concrete Horde_Form_Action subclass
* to return. If $form is an array, then we will look
* in $form[0]/lib/Form/Action/ for the subclass
* implementation named $form[1].php.
* @param array $params A hash containing any additional configuration a
* form might need.
*
* @return Horde_Form_Action The concrete Horde_Form_Action reference, or
* false on an error.
*/
function &factory($action, $params = null)
{
if (is_array($action)) {
$app = $action[0];
$action = $action[1];
}
$action = basename($action);
if (empty($action) || (strcmp($action, 'none') == 0)) {
return PEAR::raiseError('Cannot instantiate abstract class Horde_Form_Action.');
}
if (!empty($app)) {
require_once $GLOBALS['registry']->get('fileroot', $app) . '/lib/Form/Action/' . $action . '.php';
} elseif (@file_exists(dirname(__FILE__) . '/Action/' . $action . '.php')) {
require_once dirname(__FILE__) . '/Action/' . $action . '.php';
} else {
require_once 'Horde/Form/Action/' . $action . '.php';
}
$class = 'Horde_Form_Action_' . $action;
if (class_exists($class)) {
$instance = &new $class($params);
} else {
$instance = PEAR::raiseError('Class definition of ' . $class . ' not found.');
}
return $instance;
}
/**
* Attempts to return a reference to a concrete
* Horde_Form_Action instance based on $action. It will only
* create a new instance if no Horde_Form_Action instance with
* the same parameters currently exists.
*
* This should be used if multiple types of form renderers (and,
* thus, multiple Horde_Form_Action instances) are required.
*
* This method must be invoked as: $var =
* &Horde_Form_Action::singleton()
*
* @param mixed $action The type of concrete Horde_Form_Action subclass to return.
* The code is dynamically included. If $action is an array,
* then we will look in $action[0]/lib/Form/Action/ for
* the subclass implementation named $action[1].php.
* @param array $params A hash containing any additional configuration a
* form might need.
*
* @return Horde_Form_Action The concrete Horde_Form_Action reference, or
* false on an error.
*/
function &singleton($action, $params = null)
{
static $instances;
if (!isset($instances)) {
$instances = array();
}
$signature = serialize(array($action, $params));
if (!isset($instances[$signature])) {
$instances[$signature] = &Horde_Form_Action::factory($action, $params);
}
return $instances[$signature];
}
}
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