<?php
/* vim: set expandtab tabstop=4 shiftwidth=4: */
// +----------------------------------------------------------------------+
// | PHP version 4.0 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997, 1998, 1999, 2000, 2001 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available at through the world-wide-web at |
// | http://www.php.net/license/2_02.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Authors: Adam Daniel <adaniel1@eesus.jnj.com> |
// | Bertrand Mansion <bmansion@mamasam.com> |
// +----------------------------------------------------------------------+
//
// $Id$
require_once('HTML/Common.php');
/**
* Static utility methods.
*/
require_once('HTML/QuickForm/utils.php');
/**
* Base class for form elements
*
* @author Adam Daniel <adaniel1@eesus.jnj.com>
* @author Bertrand Mansion <bmansion@mamasam.com>
* @version 1.3
* @since PHP4.04pl1
* @access public
* @abstract
*/
class HTML_QuickForm_element extends HTML_Common
{
// {{{ properties
/**
* Label of the field
* @var string
* @since 1.3
* @access private
*/
var $_label = '';
/**
* Form element type
* @var string
* @since 1.0
* @access private
*/
var $_type = '';
/**
* Flag to tell if element is frozen
* @var boolean
* @since 1.0
* @access private
*/
var $_flagFrozen = false;
/**
* Does the element support persistant data when frozen
* @var boolean
* @since 1.3
* @access private
*/
var $_persistantFreeze = false;
// }}}
// {{{ constructor
/**
* Class constructor
*
* @param string Name of the element
* @param mixed Label(s) for the element
* @param mixed Associative array of tag attributes or HTML attributes name="value" pairs
* @since 1.0
* @access public
* @return void
*/
public function __construct($elementName=null, $elementLabel=null, $attributes=null) {
parent::__construct($attributes);
if (isset($elementName)) {
$this->setName($elementName);
}
if (isset($elementLabel)) {
$this->setLabel($elementLabel);
}
} //end constructor
/**
* Old syntax of class constructor. Deprecated in PHP7.
*
* @deprecated since Moodle 3.1
*/
public function HTML_QuickForm_element($elementName=null, $elementLabel=null, $attributes=null) {
debugging('Use of class name as constructor is deprecated', DEBUG_DEVELOPER);
self::__construct($elementName, $elementLabel, $attributes);
}
// }}}
// {{{ apiVersion()
/**
* Returns the current API version
*
* @since 1.0
* @access public
* @return float
*/
function apiVersion()
{
return 2.0;
} // end func apiVersion
// }}}
// {{{ getType()
/**
* Returns element type
*
* @since 1.0
* @access public
* @return string
*/
function getType()
{
return $this->_type;
} // end func getType
// }}}
// {{{ setName()
/**
* Sets the input field name
*
* @param string $name Input field name attribute
* @since 1.0
* @access public
* @return void
*/
function setName($name)
{
// interface method
} //end func setName
// }}}
// {{{ getName()
/**
* Returns the element name
*
* @since 1.0
* @access public
* @return string
*/
function getName()
{
// interface method
} //end func getName
// }}}
// {{{ setValue()
/**
* Sets the value of the form element
*
* @param string $value Default value of the form element
* @since 1.0
* @access public
* @return void
*/
function setValue($value)
{
// interface
} // end func setValue
// }}}
// {{{ getValue()
/**
* Returns the value of the form element
*
* @since 1.0
* @access public
* @return mixed
*/
function getValue()
{
// interface
return null;
} // end func getValue
// }}}
// {{{ freeze()
/**
* Freeze the element so that only its value is returned
*
* @access public
* @return void
*/
function freeze()
{
$this->_flagFrozen = true;
} //end func freeze
// }}}
// {{{ unfreeze()
/**
* Unfreezes the element so that it becomes editable
*
* @access public
* @return void
* @since 3.2.4
*/
function unfreeze()
{
$this->_flagFrozen = false;
}
// }}}
// {{{ getFrozenHtml()
/**
* Returns the value of field without HTML tags
*
* @since 1.0
* @access public
* @return string
*/
function getFrozenHtml()
{
$value = $this->getValue();
return ('' != $value? htmlspecialchars($value): ' ') .
$this->_getPersistantData();
} //end func getFrozenHtml
// }}}
// {{{ _getPersistantData()
/**
* Used by getFrozenHtml() to pass the element's value if _persistantFreeze is on
*
* @access private
* @return string
*/
function _getPersistantData()
{
if (!$this->_persistantFreeze) {
return '';
} else {
$id = $this->getAttribute('id');
if (isset($id)) {
// Id of persistant input is different then the actual input.
$id = array('id' => $id . '_persistant');
} else {
$id = array();
}
return '<input' . $this->_getAttrString(array(
'type' => 'hidden',
'name' => $this->getName(),
'value' => $this->getValue()
) + $id) . ' />';
}
}
// }}}
// {{{ isFrozen()
/**
* Returns whether or not the element is frozen
*
* @since 1.3
* @access public
* @return bool
*/
function isFrozen()
{
return $this->_flagFrozen;
} // end func isFrozen
// }}}
// {{{ setPersistantFreeze()
/**
* Sets wether an element value should be kept in an hidden field
* when the element is frozen or not
*
* @param bool $persistant True if persistant value
* @since 2.0
* @access public
* @return void
*/
function setPersistantFreeze($persistant=false)
{
$this->_persistantFreeze = $persistant;
} //end func setPersistantFreeze
// }}}
// {{{ setLabel()
/**
* Sets display text for the element
*
* @param string $label Display text for the element
* @since 1.3
* @access public
* @return void
*/
function setLabel($label)
{
$this->_label = $label;
} //end func setLabel
// }}}
// {{{ getLabel()
/**
* Returns display text for the element
*
* @since 1.3
* @access public
* @return string
*/
function getLabel()
{
return $this->_label;
} //end func getLabel
// }}}
// {{{ _findValue()
/**
* Tries to find the element value from the values array
*
* @since 2.7
* @access private
* @return mixed
*/
function _findValue(&$values)
{
if (empty($values)) {
return null;
}
$elementName = $this->getName() ?? '';
if (isset($values[$elementName])) {
return $values[$elementName];
} elseif (strpos($elementName, '[')) {
$keys = str_replace(
array('\\', '\'', ']', '['), array('\\\\', '\\\'', '', "']['"),
$elementName
);
$arrayKeys = explode("']['", $keys);
return HTML_QuickForm_utils::recursiveValue($values, $arrayKeys);
} else {
return null;
}
} //end func _findValue
// }}}
// {{{ onQuickFormEvent()
/**
* Called by HTML_QuickForm whenever form event is made on this element
*
* @param string $event Name of event
* @param mixed $arg event arguments
* @param object $caller calling object
* @since 1.0
* @access public
* @return void
*/
function onQuickFormEvent($event, $arg, &$caller)
{
switch ($event) {
case 'createElement':
static::__construct($arg[0], $arg[1], $arg[2], $arg[3], $arg[4], $arg[5]);
if ($caller->getAttribute('data-random-ids') && !$this->getAttribute('id')) {
$this->_generateId();
$attributes = $this->getAttributes();
$attributes['id'] = $this->getAttribute('id') . '_' . random_string();
$this->updateAttributes($attributes);
}
break;
case 'addElement':
$this->onQuickFormEvent('createElement', $arg, $caller);
$this->onQuickFormEvent('updateValue', null, $caller);
break;
case 'updateValue':
// constant values override both default and submitted ones
// default values are overriden by submitted
$value = $this->_findValue($caller->_constantValues);
if (null === $value) {
$value = $this->_findValue($caller->_submitValues);
if (null === $value) {
$value = $this->_findValue($caller->_defaultValues);
}
}
if (null !== $value) {
$this->setValue($value);
}
break;
case 'setGroupValue':
$this->setValue($arg);
}
return true;
} // end func onQuickFormEvent
// }}}
// {{{ accept()
/**
* Accepts a renderer
*
* @param object An HTML_QuickForm_Renderer object
* @param bool Whether an element is required
* @param string An error message associated with an element
* @access public
* @return void
*/
function accept(&$renderer, $required=false, $error=null)
{
$renderer->renderElement($this, $required, $error);
} // end func accept
// }}}
// {{{ _generateId()
/**
* Automatically generates and assigns an 'id' attribute for the element.
*
* Currently used to ensure that labels work on radio buttons and
* checkboxes. Per idea of Alexander Radivanovich.
*
* @access private
* @return void
*/
function _generateId() {
if ($this->getAttribute('id')) {
return;
}
$id = $this->getName() ?? '';
$id = 'id_' . str_replace(array('qf_', '[', ']'), array('', '_', ''), $id);
$id = clean_param($id, PARAM_ALPHANUMEXT);
$this->updateAttributes(array('id' => $id));
}
// }}}
// {{{ exportValue()
/**
* Returns a 'safe' element's value
*
* @param array array of submitted values to search
* @param bool whether to return the value as associative array
* @access public
* @return mixed
*/
function exportValue(&$submitValues, $assoc = false)
{
$value = $this->_findValue($submitValues);
if (null === $value) {
$value = $this->getValue();
}
return $this->_prepareValue($value, $assoc);
}
// }}}
// {{{ _prepareValue()
/**
* Used by exportValue() to prepare the value for returning
*
* @param mixed the value found in exportValue()
* @param bool whether to return the value as associative array
* @access private
* @return mixed
*/
function _prepareValue($value, $assoc)
{
if (null === $value) {
return null;
} elseif (!$assoc) {
return $value;
} else {
$name = $this->getName();
if (!strpos($name, '[')) {
return array($name => $value);
} else {
$keys = str_replace(
array('\\', '\'', ']', '['), array('\\\\', '\\\'', '', "']['"),
$name
);
$keysArray = explode("']['", $keys);
return HTML_QuickForm_utils::recursiveBuild($keysArray, $value);
}
}
}
// }}}
} // end class HTML_QuickForm_element
?>