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<?php
/**
* The Horde_UI_VarRenderer:: class provides base functionality for
* other Horde UI elements.
*
* $Horde: framework/UI/UI/VarRenderer.php,v 1.12.10.10 2006/06/20 09:08:45 jan Exp $
*
* Copyright 2003-2006 Jason M. Felice <jfelice@cronosys.com>
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
*
* @since Horde_UI 0.0.1
* @package Horde_UI
*/
class Horde_UI_VarRenderer {
/**
* Parameters which change this renderer's behavior.
*
* @var array
*/
var $_params;
/**
* Charset to use for output.
*
* @var string
*/
var $_charset;
/**
* Constructs a new renderer.
*
* @param array $params The name of the variable which will track this UI
* widget's state.
*/
function Horde_UI_VarRenderer($params = array())
{
$this->_params = $params;
$this->_charset = NLS::getCharset();
}
/**
* Constructs a new Horde_UI_VarRenderer:: instance.
*
* @param mixed $driver This is the renderer subclass we will instantiate.
* If an array is passed, the first element is the
* library path and the second element is the driver
* name.
* @param array $params Parameters specific to the subclass.
*
* @return Horde_UI_VarRenderer A Horde_UI_VarRenderer:: subclass
* instance.
*/
function &factory($driver, $params = array())
{
if (is_array($driver)) {
$app = $driver[0];
$driver = $driver[1];
}
$driver = basename($driver);
if (!empty($app)) {
require_once $GLOBALS['registry']->get('fileroot', $app) . '/lib/UI/VarRenderer/' . $driver . '.php';
} elseif (@file_exists(dirname(__FILE__) . '/VarRenderer/' . $driver . '.php')) {
require_once dirname(__FILE__) . '/VarRenderer/' . $driver . '.php';
} else {
@include_once 'Horde/UI/VarRenderer/' . $driver . '.php';
}
$class = 'Horde_UI_VarRenderer_' . $driver;
if (class_exists($class)) {
$vr = &new $class($params);
} else {
$vr = PEAR::raiseError('Class definition of ' . $class . ' not found.');
}
return $vr;
}
/**
* Returns a Horde_UI_VarRenderer:: instance, constructing one with the
* specified parameters if necessary.
*
* @param string $driver This is the renderer subclass we will
* instantiate.
* @param array $params Parameters specific to the subclass.
*
* @return Horde_UI_VarRenderer A Horde_UI_VarRenderer:: subclass
* instance.
*/
function &singleton($driver, $params = array())
{
static $cache;
if (is_null($driver)) {
$class = 'Horde_UI_VarRenderer';
}
$key = serialize(array ($driver, $params));
if (!isset($cache[$key])) {
$cache[$key] = &Horde_UI_VarRenderer::factory($driver, $params);
}
return $cache[$key];
}
/**
* Renders a variable.
*
* @param Horde_Form &$form Reference to a Horde_Form instance,
* or null if none is available.
* @param Horde_Form_Variable &$var Reference to a Horde_Form_Variable.
* @param Variables &$vars A Variables instance.
* @param boolean $isInput Whether this is an input field.
*/
function render(&$form, &$var, &$vars, $isInput = false)
{
if ($isInput) {
$state = 'Input';
} else {
$state = 'Display';
}
$method = "_renderVar${state}_" . $var->type->getTypeName();
if (!@method_exists($this, $method)) {
$method = "_renderVar${state}Default";
}
return $this->$method($form, $var, $vars);
}
/**
* Finishes rendering after all fields are output.
*/
function renderEnd()
{
return '';
}
}
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